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Commit | Line | Data |
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4291d9c8 | 1 | /* Top level of GNU C compiler |
4559fd9e | 2 | Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
c4cc12b7 | 3 | 1999, 2000, 2001, 2002 Free Software Foundation, Inc. |
4291d9c8 | 4 | |
1322177d | 5 | This file is part of GCC. |
4291d9c8 | 6 | |
1322177d LB |
7 | GCC is free software; you can redistribute it and/or modify it under |
8 | the terms of the GNU General Public License as published by the Free | |
9 | Software Foundation; either version 2, or (at your option) any later | |
10 | version. | |
4291d9c8 | 11 | |
1322177d LB |
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
4291d9c8 RS |
16 | |
17 | You should have received a copy of the GNU General Public License | |
1322177d LB |
18 | along with GCC; see the file COPYING. If not, write to the Free |
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
4291d9c8 | 21 | |
4291d9c8 RS |
22 | /* This is the top level of cc1/c++. |
23 | It parses command args, opens files, invokes the various passes | |
24 | in the proper order, and counts the time used by each. | |
25 | Error messages and low-level interface to malloc also handled here. */ | |
26 | ||
27 | #include "config.h" | |
670ee920 KG |
28 | #undef FLOAT /* This is for hpux. They should change hpux. */ |
29 | #undef FFS /* Some systems define this in param.h. */ | |
30 | #include "system.h" | |
4291d9c8 RS |
31 | #include <signal.h> |
32 | #include <setjmp.h> | |
956d6950 JL |
33 | |
34 | #ifdef HAVE_SYS_RESOURCE_H | |
35 | # include <sys/resource.h> | |
36 | #endif | |
37 | ||
38 | #ifdef HAVE_SYS_TIMES_H | |
39 | # include <sys/times.h> | |
eb910b5a | 40 | #endif |
4291d9c8 RS |
41 | |
42 | #include "input.h" | |
43 | #include "tree.h" | |
4291d9c8 | 44 | #include "rtl.h" |
6baf1cc8 | 45 | #include "tm_p.h" |
4291d9c8 RS |
46 | #include "flags.h" |
47 | #include "insn-attr.h" | |
e5e809f4 | 48 | #include "insn-config.h" |
0dd0e980 | 49 | #include "insn-flags.h" |
23280139 | 50 | #include "hard-reg-set.h" |
e5e809f4 | 51 | #include "recog.h" |
e14417fa | 52 | #include "output.h" |
3d195391 | 53 | #include "except.h" |
49ad7cfa | 54 | #include "function.h" |
a0c8e1b2 | 55 | #include "toplev.h" |
114791ea | 56 | #include "expr.h" |
b1eeb243 | 57 | #include "basic-block.h" |
ab87f8c8 | 58 | #include "intl.h" |
0a25f1f5 | 59 | #include "ggc.h" |
6a2cc2ac | 60 | #include "graph.h" |
272df862 | 61 | #include "loop.h" |
d0af450d | 62 | #include "regs.h" |
2a9a326b | 63 | #include "timevar.h" |
764dbbf2 | 64 | #include "diagnostic.h" |
b53978a3 | 65 | #include "ssa.h" |
c6d9a88c | 66 | #include "params.h" |
8461e984 | 67 | #include "reload.h" |
5262d6b6 | 68 | #include "dwarf2asm.h" |
c0e7830f | 69 | #include "integrate.h" |
a51d908e | 70 | #include "debug.h" |
7c262518 | 71 | #include "target.h" |
d23c55c2 | 72 | #include "langhooks.h" |
f246a305 | 73 | |
76ead72b RL |
74 | #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO) |
75 | #include "dwarf2out.h" | |
76 | #endif | |
77 | ||
4f70758f | 78 | #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) |
76ead72b RL |
79 | #include "dbxout.h" |
80 | #endif | |
81 | ||
82 | #ifdef SDB_DEBUGGING_INFO | |
83 | #include "sdbout.h" | |
84 | #endif | |
440aabf8 NB |
85 | |
86 | #ifdef XCOFF_DEBUGGING_INFO | |
87 | #include "xcoffout.h" /* Needed for external data | |
88 | declarations for e.g. AIX 4.x. */ | |
89 | #endif | |
d506f649 KG |
90 | |
91 | #ifdef HALF_PIC_DEBUG | |
92 | #include "halfpic.h" | |
93 | #endif | |
4291d9c8 RS |
94 | \f |
95 | #ifdef VMS | |
96 | /* The extra parameters substantially improve the I/O performance. */ | |
854a97f0 | 97 | |
4291d9c8 | 98 | static FILE * |
37c9f674 | 99 | vms_fopen (fname, type) |
854a97f0 KH |
100 | char *fname; |
101 | char *type; | |
4291d9c8 | 102 | { |
37c9f674 RK |
103 | /* The <stdio.h> in the gcc-vms-1.42 distribution prototypes fopen with two |
104 | fixed arguments, which matches ANSI's specification but not VAXCRTL's | |
105 | pre-ANSI implementation. This hack circumvents the mismatch problem. */ | |
106 | FILE *(*vmslib_fopen)() = (FILE *(*)()) fopen; | |
107 | ||
108 | if (*type == 'w') | |
109 | return (*vmslib_fopen) (fname, type, "mbc=32", | |
110 | "deq=64", "fop=tef", "shr=nil"); | |
111 | else | |
112 | return (*vmslib_fopen) (fname, type, "mbc=32"); | |
4291d9c8 | 113 | } |
854a97f0 | 114 | |
37c9f674 | 115 | #define fopen vms_fopen |
854a97f0 | 116 | #endif /* VMS */ |
4291d9c8 | 117 | |
b0316e35 RS |
118 | /* Carry information from ASM_DECLARE_OBJECT_NAME |
119 | to ASM_FINISH_DECLARE_OBJECT. */ | |
120 | ||
121 | extern int size_directive_output; | |
5e10b3cc | 122 | extern tree last_assemble_variable_decl; |
b0316e35 | 123 | |
f5e99456 NB |
124 | static void general_init PARAMS ((char *)); |
125 | static void parse_options_and_default_flags PARAMS ((int, char **)); | |
4d6baafa | 126 | static void do_compile PARAMS ((void)); |
f5e99456 NB |
127 | static void process_options PARAMS ((void)); |
128 | static void lang_independent_init PARAMS ((void)); | |
22703ccc | 129 | static int lang_dependent_init PARAMS ((const char *)); |
f5e99456 | 130 | static void init_asm_output PARAMS ((const char *)); |
22703ccc | 131 | static void finalize PARAMS ((void)); |
f5e99456 | 132 | |
58782098 KG |
133 | static void set_target_switch PARAMS ((const char *)); |
134 | static const char *decl_name PARAMS ((tree, int)); | |
6ed551b4 | 135 | |
58782098 | 136 | static void float_signal PARAMS ((int)) ATTRIBUTE_NORETURN; |
a7023245 | 137 | static void crash_signal PARAMS ((int)) ATTRIBUTE_NORETURN; |
94aca342 | 138 | static void set_float_handler PARAMS ((jmp_buf)); |
f5e99456 | 139 | static void compile_file PARAMS ((void)); |
58782098 | 140 | static void display_help PARAMS ((void)); |
10501d8f | 141 | static void display_target_options PARAMS ((void)); |
58782098 KG |
142 | |
143 | static void decode_d_option PARAMS ((const char *)); | |
61098249 RH |
144 | static int decode_f_option PARAMS ((const char *)); |
145 | static int decode_W_option PARAMS ((const char *)); | |
146 | static int decode_g_option PARAMS ((const char *)); | |
319ea138 | 147 | static unsigned int independent_decode_option PARAMS ((int, char **)); |
58782098 KG |
148 | |
149 | static void print_version PARAMS ((FILE *, const char *)); | |
150 | static int print_single_switch PARAMS ((FILE *, int, int, const char *, | |
87e11268 KG |
151 | const char *, const char *, |
152 | const char *, const char *)); | |
58782098 | 153 | static void print_switch_values PARAMS ((FILE *, int, int, const char *, |
87e11268 | 154 | const char *, const char *)); |
735a0e33 | 155 | |
3d5cdd42 DE |
156 | /* Length of line when printing switch values. */ |
157 | #define MAX_LINE 75 | |
158 | ||
4291d9c8 RS |
159 | /* Name of program invoked, sans directories. */ |
160 | ||
7adfcfed | 161 | const char *progname; |
4291d9c8 | 162 | |
aa5b94de | 163 | /* Copy of arguments to toplev_main. */ |
4291d9c8 RS |
164 | int save_argc; |
165 | char **save_argv; | |
166 | \f | |
167 | /* Name of current original source file (what was input to cpp). | |
168 | This comes from each #-command in the actual input. */ | |
169 | ||
3b304f5b | 170 | const char *input_filename; |
4291d9c8 RS |
171 | |
172 | /* Name of top-level original source file (what was input to cpp). | |
173 | This comes from the #-command at the beginning of the actual input. | |
174 | If there isn't any there, then this is the cc1 input file name. */ | |
175 | ||
3b304f5b | 176 | const char *main_input_filename; |
4291d9c8 | 177 | |
4291d9c8 RS |
178 | /* Current line number in real source file. */ |
179 | ||
180 | int lineno; | |
181 | ||
f1db3576 JL |
182 | /* Nonzero if it is unsafe to create any new pseudo registers. */ |
183 | int no_new_pseudos; | |
184 | ||
4291d9c8 RS |
185 | /* Stack of currently pending input files. */ |
186 | ||
187 | struct file_stack *input_file_stack; | |
188 | ||
189 | /* Incremented on each change to input_file_stack. */ | |
190 | int input_file_stack_tick; | |
191 | ||
4291d9c8 RS |
192 | /* Name to use as base of names for dump output files. */ |
193 | ||
87e11268 | 194 | const char *dump_base_name; |
4291d9c8 | 195 | |
6baf9874 DR |
196 | /* Format to use to print dumpfile index value */ |
197 | #ifndef DUMPFILE_FORMAT | |
198 | #define DUMPFILE_FORMAT ".%02d." | |
199 | #endif | |
200 | ||
4291d9c8 RS |
201 | /* Bit flags that specify the machine subtype we are compiling for. |
202 | Bits are tested using macros TARGET_... defined in the tm.h file | |
203 | and set by `-m...' switches. Must be defined in rtlanal.c. */ | |
204 | ||
205 | extern int target_flags; | |
206 | ||
a51d908e NB |
207 | /* Debug hooks - dependent upon command line options. */ |
208 | ||
f5e99456 | 209 | struct gcc_debug_hooks *debug_hooks = &do_nothing_debug_hooks; |
a51d908e | 210 | |
61098249 RH |
211 | /* Describes a dump file. */ |
212 | ||
213 | struct dump_file_info | |
214 | { | |
215 | /* The unique extension to apply, e.g. ".jump". */ | |
854a97f0 | 216 | const char *const extension; |
61098249 RH |
217 | |
218 | /* The -d<c> character that enables this dump file. */ | |
219 | char const debug_switch; | |
220 | ||
221 | /* True if there is a corresponding graph dump file. */ | |
222 | char const graph_dump_p; | |
223 | ||
224 | /* True if the user selected this dump. */ | |
225 | char enabled; | |
226 | ||
227 | /* True if the files have been initialized (ie truncated). */ | |
228 | char initialized; | |
229 | }; | |
230 | ||
231 | /* Enumerate the extant dump files. */ | |
232 | ||
233 | enum dump_file_index | |
234 | { | |
235 | DFI_rtl, | |
48d9ade5 | 236 | DFI_sibling, |
52a11cbf | 237 | DFI_eh, |
61098249 | 238 | DFI_jump, |
61098249 | 239 | DFI_ssa, |
0b47e4c1 | 240 | DFI_ssa_ccp, |
62d285ff | 241 | DFI_ssa_dce, |
61098249 | 242 | DFI_ussa, |
0826f1d8 JL |
243 | DFI_cse, |
244 | DFI_addressof, | |
61098249 RH |
245 | DFI_gcse, |
246 | DFI_loop, | |
247 | DFI_cse2, | |
51891abe | 248 | DFI_cfg, |
61098249 | 249 | DFI_bp, |
51891abe | 250 | DFI_life, |
61098249 | 251 | DFI_combine, |
9ec6d7ab | 252 | DFI_ce, |
61098249 RH |
253 | DFI_regmove, |
254 | DFI_sched, | |
255 | DFI_lreg, | |
256 | DFI_greg, | |
8bb16620 | 257 | DFI_postreload, |
61098249 RH |
258 | DFI_flow2, |
259 | DFI_peephole2, | |
5fa41e13 | 260 | DFI_rnreg, |
2b2a8f1f | 261 | DFI_ce2, |
61098249 | 262 | DFI_sched2, |
1e5fd094 | 263 | DFI_stack, |
61098249 | 264 | DFI_bbro, |
61098249 RH |
265 | DFI_mach, |
266 | DFI_dbr, | |
61098249 RH |
267 | DFI_MAX |
268 | }; | |
269 | ||
270 | /* Describes all the dump files. Should be kept in order of the | |
9ec6d7ab RH |
271 | pass and in sync with dump_file_index above. |
272 | ||
273 | Remaining -d letters: | |
274 | ||
52a11cbf | 275 | " o q u " |
1e5fd094 | 276 | " H JK OPQ TUV YZ" |
9ec6d7ab | 277 | */ |
61098249 | 278 | |
c083a819 | 279 | static struct dump_file_info dump_file[DFI_MAX] = |
61098249 RH |
280 | { |
281 | { "rtl", 'r', 0, 0, 0 }, | |
48d9ade5 | 282 | { "sibling", 'i', 0, 0, 0 }, |
52a11cbf | 283 | { "eh", 'h', 0, 0, 0 }, |
61098249 | 284 | { "jump", 'j', 0, 0, 0 }, |
61098249 | 285 | { "ssa", 'e', 1, 0, 0 }, |
0b47e4c1 | 286 | { "ssaccp", 'W', 1, 0, 0 }, |
62d285ff | 287 | { "ssadce", 'X', 1, 0, 0 }, |
61098249 | 288 | { "ussa", 'e', 1, 0, 0 }, /* Yes, duplicate enable switch. */ |
0826f1d8 JL |
289 | { "cse", 's', 0, 0, 0 }, |
290 | { "addressof", 'F', 0, 0, 0 }, | |
61098249 RH |
291 | { "gcse", 'G', 1, 0, 0 }, |
292 | { "loop", 'L', 1, 0, 0 }, | |
293 | { "cse2", 't', 1, 0, 0 }, | |
51891abe | 294 | { "cfg", 'f', 1, 0, 0 }, |
61098249 | 295 | { "bp", 'b', 1, 0, 0 }, |
51891abe | 296 | { "life", 'f', 1, 0, 0 }, /* Yes, duplicate enable switch. */ |
61098249 | 297 | { "combine", 'c', 1, 0, 0 }, |
9ec6d7ab | 298 | { "ce", 'C', 1, 0, 0 }, |
61098249 RH |
299 | { "regmove", 'N', 1, 0, 0 }, |
300 | { "sched", 'S', 1, 0, 0 }, | |
301 | { "lreg", 'l', 1, 0, 0 }, | |
302 | { "greg", 'g', 1, 0, 0 }, | |
8bb16620 | 303 | { "postreload", 'o', 1, 0, 0 }, |
61098249 RH |
304 | { "flow2", 'w', 1, 0, 0 }, |
305 | { "peephole2", 'z', 1, 0, 0 }, | |
5fa41e13 | 306 | { "rnreg", 'n', 1, 0, 0 }, |
2b2a8f1f | 307 | { "ce2", 'E', 1, 0, 0 }, |
61098249 | 308 | { "sched2", 'R', 1, 0, 0 }, |
1e5fd094 | 309 | { "stack", 'k', 1, 0, 0 }, |
61098249 | 310 | { "bbro", 'B', 1, 0, 0 }, |
61098249 RH |
311 | { "mach", 'M', 1, 0, 0 }, |
312 | { "dbr", 'd', 0, 0, 0 }, | |
61098249 RH |
313 | }; |
314 | ||
315 | static int open_dump_file PARAMS ((enum dump_file_index, tree)); | |
316 | static void close_dump_file PARAMS ((enum dump_file_index, | |
317 | void (*) (FILE *, rtx), rtx)); | |
318 | ||
319 | /* Other flags saying which kinds of debugging dump have been requested. */ | |
320 | ||
321 | int rtl_dump_and_exit; | |
322 | int flag_print_asm_name; | |
61098249 | 323 | static int version_flag; |
854a97f0 | 324 | static char *filename; |
735a0e33 | 325 | enum graph_dump_types graph_dump_format; |
4291d9c8 RS |
326 | |
327 | /* Name for output file of assembly code, specified with -o. */ | |
328 | ||
329 | char *asm_file_name; | |
330 | ||
331 | /* Value of the -G xx switch, and whether it was passed or not. */ | |
332 | int g_switch_value; | |
333 | int g_switch_set; | |
334 | ||
335 | /* Type(s) of debugging information we are producing (if any). | |
336 | See flags.h for the definitions of the different possible | |
337 | types of debugging information. */ | |
338 | enum debug_info_type write_symbols = NO_DEBUG; | |
339 | ||
340 | /* Level of debugging information we are producing. See flags.h | |
341 | for the definitions of the different possible levels. */ | |
342 | enum debug_info_level debug_info_level = DINFO_LEVEL_NONE; | |
343 | ||
a53d0bcc RS |
344 | /* Nonzero means use GNU-only extensions in the generated symbolic |
345 | debugging information. */ | |
346 | /* Currently, this only has an effect when write_symbols is set to | |
347 | DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */ | |
348 | int use_gnu_debug_info_extensions = 0; | |
4291d9c8 RS |
349 | |
350 | /* Nonzero means do optimizations. -O. | |
351 | Particular numeric values stand for particular amounts of optimization; | |
352 | thus, -O2 stores 2 here. However, the optimizations beyond the basic | |
353 | ones are not controlled directly by this variable. Instead, they are | |
354 | controlled by individual `flag_...' variables that are defaulted | |
355 | based on this variable. */ | |
356 | ||
357 | int optimize = 0; | |
358 | ||
c6aded7c AG |
359 | /* Nonzero means optimize for size. -Os. |
360 | The only valid values are zero and non-zero. When optimize_size is | |
361 | non-zero, optimize defaults to 2, but certain individual code | |
362 | bloating optimizations are disabled. */ | |
363 | ||
364 | int optimize_size = 0; | |
365 | ||
cb773845 ZW |
366 | /* Nonzero if we should exit after parsing options. */ |
367 | static int exit_after_options = 0; | |
368 | ||
00262c8a ML |
369 | /* The FUNCTION_DECL for the function currently being compiled, |
370 | or 0 if between functions. */ | |
371 | tree current_function_decl; | |
372 | ||
373 | /* Set to the FUNC_BEGIN label of the current function, or NULL_TREE | |
374 | if none. */ | |
375 | tree current_function_func_begin_label; | |
376 | ||
a1d7ffe3 JM |
377 | /* Pointer to function to compute the name to use to print a declaration. |
378 | DECL is the declaration in question. | |
379 | VERBOSITY determines what information will be printed: | |
380 | 0: DECL_NAME, demangled as necessary. | |
381 | 1: and scope information. | |
382 | 2: and any other information that might be interesting, such as function | |
383 | parameter types in C++. */ | |
4291d9c8 | 384 | |
58782098 | 385 | const char *(*decl_printable_name) PARAMS ((tree, int)); |
4291d9c8 RS |
386 | |
387 | /* Pointer to function to compute rtl for a language-specific tree code. */ | |
388 | ||
114791ea | 389 | typedef rtx (*lang_expand_expr_t) |
58782098 | 390 | PARAMS ((union tree_node *, rtx, enum machine_mode, |
114791ea KG |
391 | enum expand_modifier modifier)); |
392 | ||
393 | lang_expand_expr_t lang_expand_expr = 0; | |
4291d9c8 | 394 | |
2b599527 RS |
395 | /* Pointer to function to finish handling an incomplete decl at the |
396 | end of compilation. */ | |
397 | ||
58782098 | 398 | void (*incomplete_decl_finalize_hook) PARAMS ((tree)) = 0; |
2b599527 | 399 | |
881c6935 JM |
400 | /* Nonzero if doing dwarf2 duplicate elimination. */ |
401 | ||
402 | int flag_eliminate_dwarf2_dups = 0; | |
403 | ||
4291d9c8 RS |
404 | /* Nonzero if generating code to do profiling. */ |
405 | ||
406 | int profile_flag = 0; | |
407 | ||
0d332add DE |
408 | /* Nonzero if generating code to profile program flow graph arcs. */ |
409 | ||
410 | int profile_arc_flag = 0; | |
411 | ||
412 | /* Nonzero if generating info for gcov to calculate line test coverage. */ | |
413 | ||
414 | int flag_test_coverage = 0; | |
415 | ||
416 | /* Nonzero indicates that branch taken probabilities should be calculated. */ | |
417 | ||
418 | int flag_branch_probabilities = 0; | |
419 | ||
854a97f0 | 420 | /* Nonzero if basic blocks should be reordered. */ |
11bdd2ae SC |
421 | |
422 | int flag_reorder_blocks = 0; | |
423 | ||
854a97f0 | 424 | /* Nonzero if registers should be renamed. */ |
7b82b5da SC |
425 | |
426 | int flag_rename_registers = 0; | |
8582c27b | 427 | int flag_cprop_registers = 0; |
7b82b5da | 428 | |
4291d9c8 RS |
429 | /* Nonzero for -pedantic switch: warn about anything |
430 | that standard spec forbids. */ | |
431 | ||
432 | int pedantic = 0; | |
433 | ||
434 | /* Temporarily suppress certain warnings. | |
435 | This is set while reading code from a system header file. */ | |
436 | ||
437 | int in_system_header = 0; | |
438 | ||
fba0bfd4 | 439 | /* Don't print functions as they are compiled. -quiet. */ |
4291d9c8 RS |
440 | |
441 | int quiet_flag = 0; | |
fba0bfd4 ZW |
442 | |
443 | /* Print times taken by the various passes. -ftime-report. */ | |
444 | ||
445 | int time_report = 0; | |
446 | ||
447 | /* Print memory still in use at end of compilation (which may have little | |
448 | to do with peak memory consumption). -fmem-report. */ | |
449 | ||
450 | int mem_report = 0; | |
451 | ||
0e5921e8 ZW |
452 | /* Non-zero means to collect statistics which might be expensive |
453 | and to print them when we are done. */ | |
454 | int flag_detailed_statistics = 0; | |
455 | ||
4291d9c8 RS |
456 | \f |
457 | /* -f flags. */ | |
458 | ||
459 | /* Nonzero means `char' should be signed. */ | |
460 | ||
461 | int flag_signed_char; | |
462 | ||
463 | /* Nonzero means give an enum type only as many bytes as it needs. */ | |
464 | ||
465 | int flag_short_enums; | |
466 | ||
467 | /* Nonzero for -fcaller-saves: allocate values in regs that need to | |
468 | be saved across function calls, if that produces overall better code. | |
469 | Optional now, so people can test it. */ | |
470 | ||
471 | #ifdef DEFAULT_CALLER_SAVES | |
472 | int flag_caller_saves = 1; | |
473 | #else | |
474 | int flag_caller_saves = 0; | |
475 | #endif | |
476 | ||
958ec8ca JW |
477 | /* Nonzero if structures and unions should be returned in memory. |
478 | ||
479 | This should only be defined if compatibility with another compiler or | |
480 | with an ABI is needed, because it results in slower code. */ | |
481 | ||
482 | #ifndef DEFAULT_PCC_STRUCT_RETURN | |
483 | #define DEFAULT_PCC_STRUCT_RETURN 1 | |
484 | #endif | |
485 | ||
4291d9c8 RS |
486 | /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */ |
487 | ||
958ec8ca | 488 | int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN; |
4291d9c8 RS |
489 | |
490 | /* Nonzero for -fforce-mem: load memory value into a register | |
491 | before arithmetic on it. This makes better cse but slower compilation. */ | |
492 | ||
493 | int flag_force_mem = 0; | |
494 | ||
495 | /* Nonzero for -fforce-addr: load memory address into a register before | |
496 | reference to memory. This makes better cse but slower compilation. */ | |
497 | ||
498 | int flag_force_addr = 0; | |
499 | ||
500 | /* Nonzero for -fdefer-pop: don't pop args after each function call; | |
501 | instead save them up to pop many calls' args with one insns. */ | |
502 | ||
6731a3e3 | 503 | int flag_defer_pop = 0; |
4291d9c8 RS |
504 | |
505 | /* Nonzero for -ffloat-store: don't allocate floats and doubles | |
506 | in extended-precision registers. */ | |
507 | ||
508 | int flag_float_store = 0; | |
509 | ||
510 | /* Nonzero for -fcse-follow-jumps: | |
511 | have cse follow jumps to do a more extensive job. */ | |
512 | ||
513 | int flag_cse_follow_jumps; | |
514 | ||
8b3686ed RK |
515 | /* Nonzero for -fcse-skip-blocks: |
516 | have cse follow a branch around a block. */ | |
517 | int flag_cse_skip_blocks; | |
518 | ||
4291d9c8 RS |
519 | /* Nonzero for -fexpensive-optimizations: |
520 | perform miscellaneous relatively-expensive optimizations. */ | |
521 | int flag_expensive_optimizations; | |
522 | ||
523 | /* Nonzero for -fthread-jumps: | |
524 | have jump optimize output of loop. */ | |
525 | ||
526 | int flag_thread_jumps; | |
527 | ||
528 | /* Nonzero enables strength-reduction in loop.c. */ | |
529 | ||
530 | int flag_strength_reduce = 0; | |
531 | ||
532 | /* Nonzero enables loop unrolling in unroll.c. Only loops for which the | |
533 | number of iterations can be calculated at compile-time (UNROLL_COMPLETELY, | |
534 | UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are | |
535 | unrolled. */ | |
536 | ||
537 | int flag_unroll_loops; | |
538 | ||
539 | /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled. | |
540 | This is generally not a win. */ | |
541 | ||
542 | int flag_unroll_all_loops; | |
543 | ||
0dd0e980 JH |
544 | /* Nonzero enables prefetch optimizations for arrays in loops. */ |
545 | ||
546 | int flag_prefetch_loop_arrays; | |
547 | ||
e5eb27e5 | 548 | /* Nonzero forces all invariant computations in loops to be moved |
854a97f0 | 549 | outside the loop. */ |
e5eb27e5 JL |
550 | |
551 | int flag_move_all_movables = 0; | |
552 | ||
553 | /* Nonzero forces all general induction variables in loops to be | |
854a97f0 | 554 | strength reduced. */ |
e5eb27e5 JL |
555 | |
556 | int flag_reduce_all_givs = 0; | |
557 | ||
9ec36da5 JL |
558 | /* Nonzero to perform full register move optimization passes. This is the |
559 | default for -O2. */ | |
560 | ||
561 | int flag_regmove = 0; | |
562 | ||
4291d9c8 RS |
563 | /* Nonzero for -fwritable-strings: |
564 | store string constants in data segment and don't uniquize them. */ | |
565 | ||
566 | int flag_writable_strings = 0; | |
567 | ||
568 | /* Nonzero means don't put addresses of constant functions in registers. | |
569 | Used for compiling the Unix kernel, where strange substitutions are | |
570 | done on the assembly output. */ | |
571 | ||
572 | int flag_no_function_cse = 0; | |
573 | ||
574 | /* Nonzero for -fomit-frame-pointer: | |
575 | don't make a frame pointer in simple functions that don't require one. */ | |
576 | ||
577 | int flag_omit_frame_pointer = 0; | |
578 | ||
cf440348 JL |
579 | /* Nonzero means place each function into its own section on those platforms |
580 | which support arbitrary section names and unlimited numbers of sections. */ | |
581 | ||
582 | int flag_function_sections = 0; | |
583 | ||
fd868572 | 584 | /* ... and similar for data. */ |
854a97f0 | 585 | |
fd868572 CM |
586 | int flag_data_sections = 0; |
587 | ||
4291d9c8 RS |
588 | /* Nonzero to inhibit use of define_optimization peephole opts. */ |
589 | ||
590 | int flag_no_peephole = 0; | |
591 | ||
db8cb48e JH |
592 | /* Nonzero allows GCC to optimize sibling and tail recursive calls. */ |
593 | ||
594 | int flag_optimize_sibling_calls = 0; | |
595 | ||
41af162c | 596 | /* Nonzero means the front end generally wants `errno' maintained by math |
de6c5979 | 597 | operations, like built-in SQRT. */ |
41af162c CB |
598 | |
599 | int flag_errno_math = 1; | |
600 | ||
de6c5979 BL |
601 | /* Nonzero means that unsafe floating-point math optimizations are allowed |
602 | for the sake of speed. IEEE compliance is not guaranteed, and operations | |
603 | are allowed to assume that their arguments and results are "normal" | |
604 | (e.g., nonnegative for SQRT). */ | |
605 | ||
606 | int flag_unsafe_math_optimizations = 0; | |
607 | ||
608 | /* Zero means that floating-point math operations cannot generate a | |
609 | (user-visible) trap. This is the case, for example, in nonstop | |
610 | IEEE 754 arithmetic. */ | |
611 | ||
612 | int flag_trapping_math = 1; | |
613 | ||
c64f913e CB |
614 | /* 0 means straightforward implementation of complex divide acceptable. |
615 | 1 means wide ranges of inputs must work for complex divide. | |
526aba28 | 616 | 2 means C99-like requirements for complex divide (not yet implemented). */ |
c64f913e CB |
617 | |
618 | int flag_complex_divide_method = 0; | |
619 | ||
4291d9c8 RS |
620 | /* Nonzero means all references through pointers are volatile. */ |
621 | ||
622 | int flag_volatile; | |
c6e75897 | 623 | |
ab87f8c8 | 624 | /* Nonzero means treat all global and extern variables as volatile. */ |
c6e75897 | 625 | |
38d4d0c2 | 626 | int flag_volatile_global; |
4291d9c8 | 627 | |
ab87f8c8 JL |
628 | /* Nonzero means treat all static variables as volatile. */ |
629 | ||
630 | int flag_volatile_static; | |
631 | ||
4291d9c8 RS |
632 | /* Nonzero means just do syntax checking; don't output anything. */ |
633 | ||
634 | int flag_syntax_only = 0; | |
635 | ||
7506f491 DE |
636 | /* Nonzero means perform global cse. */ |
637 | ||
638 | static int flag_gcse; | |
639 | ||
b6d24183 JL |
640 | /* Nonzero means to use global dataflow analysis to eliminate |
641 | useless null pointer tests. */ | |
642 | ||
643 | static int flag_delete_null_pointer_checks; | |
644 | ||
a13d4ebf AM |
645 | /* Nonzero means to do the enhanced load motion during gcse, which trys |
646 | to hoist loads by not killing them when a store to the same location | |
647 | is seen. */ | |
648 | ||
649 | int flag_gcse_lm = 1; | |
650 | ||
651 | /* Nonzero means to perform store motion after gcse, which will try to | |
652 | move stores closer to the exit block. Its not very effective without | |
653 | flag_gcse_lm. */ | |
654 | ||
655 | int flag_gcse_sm = 1; | |
656 | ||
4291d9c8 RS |
657 | /* Nonzero means to rerun cse after loop optimization. This increases |
658 | compilation time about 20% and picks up a few more common expressions. */ | |
659 | ||
660 | static int flag_rerun_cse_after_loop; | |
661 | ||
6d6d0fa0 JL |
662 | /* Nonzero means to run loop optimizations twice. */ |
663 | ||
64fde701 | 664 | int flag_rerun_loop_opt; |
6d6d0fa0 | 665 | |
4291d9c8 RS |
666 | /* Nonzero for -finline-functions: ok to inline functions that look like |
667 | good inline candidates. */ | |
668 | ||
669 | int flag_inline_functions; | |
670 | ||
671 | /* Nonzero for -fkeep-inline-functions: even if we make a function | |
ac2a9454 | 672 | go inline everywhere, keep its definition around for debugging |
4291d9c8 RS |
673 | purposes. */ |
674 | ||
675 | int flag_keep_inline_functions; | |
676 | ||
fadb3bc9 | 677 | /* Nonzero means that functions will not be inlined. */ |
4291d9c8 RS |
678 | |
679 | int flag_no_inline; | |
680 | ||
fbe912dd BK |
681 | /* Nonzero means that we should emit static const variables |
682 | regardless of whether or not optimization is turned on. */ | |
683 | ||
684 | int flag_keep_static_consts = 1; | |
685 | ||
4291d9c8 RS |
686 | /* Nonzero means we should be saving declaration info into a .X file. */ |
687 | ||
688 | int flag_gen_aux_info = 0; | |
689 | ||
f246a305 RS |
690 | /* Specified name of aux-info file. */ |
691 | ||
692 | static char *aux_info_file_name; | |
693 | ||
4291d9c8 RS |
694 | /* Nonzero means make the text shared if supported. */ |
695 | ||
696 | int flag_shared_data; | |
697 | ||
698 | /* Nonzero means schedule into delayed branch slots if supported. */ | |
699 | ||
700 | int flag_delayed_branch; | |
701 | ||
702 | /* Nonzero if we are compiling pure (sharable) code. | |
703 | Value is 1 if we are doing reasonable (i.e. simple | |
704 | offset into offset table) pic. Value is 2 if we can | |
705 | only perform register offsets. */ | |
706 | ||
707 | int flag_pic; | |
708 | ||
3d195391 MS |
709 | /* Nonzero means generate extra code for exception handling and enable |
710 | exception handling. */ | |
711 | ||
b53beeb2 | 712 | int flag_exceptions; |
3d195391 | 713 | |
854a97f0 | 714 | /* Nonzero means generate frame unwind info table when supported. */ |
14a774a9 RK |
715 | |
716 | int flag_unwind_tables = 0; | |
717 | ||
b932f770 JH |
718 | /* Nonzero means generate frame unwind info table exact at each insn boundary */ |
719 | ||
720 | int flag_asynchronous_unwind_tables = 0; | |
721 | ||
2786cbad | 722 | /* Nonzero means don't place uninitialized global data in common storage |
3d195391 | 723 | by default. */ |
4291d9c8 RS |
724 | |
725 | int flag_no_common; | |
726 | ||
727 | /* Nonzero means pretend it is OK to examine bits of target floats, | |
728 | even if that isn't true. The resulting code will have incorrect constants, | |
729 | but the same series of instructions that the native compiler would make. */ | |
730 | ||
731 | int flag_pretend_float; | |
732 | ||
733 | /* Nonzero means change certain warnings into errors. | |
734 | Usually these are warnings about failure to conform to some standard. */ | |
735 | ||
736 | int flag_pedantic_errors = 0; | |
737 | ||
738 | /* flag_schedule_insns means schedule insns within basic blocks (before | |
739 | local_alloc). | |
740 | flag_schedule_insns_after_reload means schedule insns after | |
741 | global_alloc. */ | |
742 | ||
743 | int flag_schedule_insns = 0; | |
744 | int flag_schedule_insns_after_reload = 0; | |
745 | ||
8c660648 JL |
746 | /* The following flags have effect only for scheduling before register |
747 | allocation: | |
748 | ||
749 | flag_schedule_interblock means schedule insns accross basic blocks. | |
750 | flag_schedule_speculative means allow speculative motion of non-load insns. | |
751 | flag_schedule_speculative_load means allow speculative motion of some | |
752 | load insns. | |
753 | flag_schedule_speculative_load_dangerous allows speculative motion of more | |
8e7336f8 | 754 | load insns. */ |
8c660648 JL |
755 | |
756 | int flag_schedule_interblock = 1; | |
757 | int flag_schedule_speculative = 1; | |
758 | int flag_schedule_speculative_load = 0; | |
759 | int flag_schedule_speculative_load_dangerous = 0; | |
8c660648 | 760 | |
46d3a873 CC |
761 | int flag_single_precision_constant; |
762 | ||
5527bf14 | 763 | /* flag_branch_on_count_reg means try to replace add-1,compare,branch tupple |
854a97f0 | 764 | by a cheaper branch on a count register. */ |
5527bf14 | 765 | int flag_branch_on_count_reg = 1; |
8c660648 | 766 | |
4291d9c8 | 767 | /* -finhibit-size-directive inhibits output of .size for ELF. |
854a97f0 | 768 | This is used only for compiling crtstuff.c, |
4291d9c8 RS |
769 | and it may be extended to other effects |
770 | needed for crtstuff.c on other systems. */ | |
771 | int flag_inhibit_size_directive = 0; | |
772 | ||
9a631e8e RS |
773 | /* -fverbose-asm causes extra commentary information to be produced in |
774 | the generated assembly code (to make it more readable). This option | |
775 | is generally only of use to those who actually need to read the | |
3d5cdd42 | 776 | generated assembly code (perhaps while debugging the compiler itself). |
c85f7c16 | 777 | -fno-verbose-asm, the default, causes the extra information |
3d5cdd42 DE |
778 | to be omitted and is useful when comparing two assembler files. */ |
779 | ||
c85f7c16 | 780 | int flag_verbose_asm = 0; |
9a631e8e | 781 | |
3d5cdd42 DE |
782 | /* -dA causes debug commentary information to be produced in |
783 | the generated assembly code (to make it more readable). This option | |
784 | is generally only of use to those who actually need to read the | |
785 | generated assembly code (perhaps while debugging the compiler itself). | |
786 | Currently, this switch is only used by dwarfout.c; however, it is intended | |
787 | to be a catchall for printing debug information in the assembler file. */ | |
788 | ||
789 | int flag_debug_asm = 0; | |
9a631e8e | 790 | |
c349e40b SC |
791 | /* -dP causes the rtl to be emitted as a comment in assembly. */ |
792 | ||
793 | int flag_dump_rtl_in_asm = 0; | |
794 | ||
4291d9c8 | 795 | /* -fgnu-linker specifies use of the GNU linker for initializations. |
d68c507d RS |
796 | (Or, more generally, a linker that handles initializations.) |
797 | -fno-gnu-linker says that collect2 will be used. */ | |
798 | #ifdef USE_COLLECT2 | |
799 | int flag_gnu_linker = 0; | |
800 | #else | |
4291d9c8 | 801 | int flag_gnu_linker = 1; |
d68c507d | 802 | #endif |
4291d9c8 | 803 | |
d9d4fb43 AS |
804 | /* Enable SSA. */ |
805 | int flag_ssa = 0; | |
806 | ||
0b47e4c1 JL |
807 | /* Enable ssa conditional constant propagation. */ |
808 | int flag_ssa_ccp = 0; | |
809 | ||
810 | /* Enable ssa aggressive dead code elimination. */ | |
62d285ff | 811 | int flag_ssa_dce = 0; |
b53978a3 | 812 | |
854a97f0 | 813 | /* Tag all structures with __attribute__(packed). */ |
566cdc73 MM |
814 | int flag_pack_struct = 0; |
815 | ||
bd83d0ac RK |
816 | /* Emit code to check for stack overflow; also may cause large objects |
817 | to be allocated dynamically. */ | |
818 | int flag_stack_check; | |
819 | ||
a157febd GK |
820 | /* When non-NULL, indicates that whenever space is allocated on the |
821 | stack, the resulting stack pointer must not pass this | |
822 | address---that is, for stacks that grow downward, the stack pointer | |
823 | must always be greater than or equal to this address; for stacks | |
824 | that grow upward, the stack pointer must be less than this address. | |
825 | At present, the rtx may be either a REG or a SYMBOL_REF, although | |
826 | the support provided depends on the backend. */ | |
827 | rtx stack_limit_rtx; | |
828 | ||
9ae8ffe7 JL |
829 | /* 0 if pointer arguments may alias each other. True in C. |
830 | 1 if pointer arguments may not alias each other but may alias | |
831 | global variables. | |
832 | 2 if pointer arguments may not alias each other and may not | |
833 | alias global variables. True in Fortran. | |
834 | This defaults to 0 for C. */ | |
835 | int flag_argument_noalias = 0; | |
836 | ||
41472af8 MM |
837 | /* Nonzero if we should do (language-dependent) alias analysis. |
838 | Typically, this analysis will assume that expressions of certain | |
839 | types do not alias expressions of certain other types. Only used | |
840 | if alias analysis (in general) is enabled. */ | |
841 | int flag_strict_aliasing = 0; | |
842 | ||
07417085 KR |
843 | /* Instrument functions with calls at entry and exit, for profiling. */ |
844 | int flag_instrument_function_entry_exit = 0; | |
845 | ||
be163a70 ZW |
846 | /* Nonzero means ignore `#ident' directives. 0 means handle them. |
847 | On SVR4 targets, it also controls whether or not to emit a | |
848 | string identifying the compiler. */ | |
849 | ||
850 | int flag_no_ident = 0; | |
b8468bc7 | 851 | |
854a97f0 | 852 | /* This will perform a peephole pass before sched2. */ |
ede7cd44 RH |
853 | int flag_peephole2 = 0; |
854 | ||
3ff51205 AH |
855 | /* This will try to guess branch probabilities. */ |
856 | int flag_guess_branch_prob = 0; | |
857 | ||
a8aa7975 GM |
858 | /* -fbounded-pointers causes gcc to compile pointers as composite |
859 | objects occupying three words: the pointer value, the base address | |
860 | of the referent object, and the address immediately beyond the end | |
861 | of the referent object. The base and extent allow us to perform | |
862 | runtime bounds checking. -fbounded-pointers implies -fcheck-bounds. */ | |
863 | int flag_bounded_pointers = 0; | |
864 | ||
865 | /* -fcheck-bounds causes gcc to generate array bounds checks. | |
866 | For C, C++: defaults to value of flag_bounded_pointers. | |
867 | For ObjC: defaults to off. | |
868 | For Java: defaults to on. | |
869 | For Fortran: defaults to off. | |
870 | For CHILL: defaults to off. */ | |
871 | int flag_bounds_check = 0; | |
872 | ||
201556f0 JJ |
873 | /* This will attempt to merge constant section constants, if 1 only |
874 | string constants and constants from constant pool, if 2 also constant | |
875 | variables. */ | |
876 | int flag_merge_constants = 1; | |
877 | ||
673b5311 MM |
878 | /* If one, renumber instruction UIDs to reduce the number of |
879 | unused UIDs if there are a lot of instructions. If greater than | |
880 | one, unconditionally renumber instruction UIDs. */ | |
881 | int flag_renumber_insns = 1; | |
882 | ||
854a97f0 KH |
883 | /* Values of the -falign-* flags: how much to align labels in code. |
884 | 0 means `use default', 1 means `don't align'. | |
efa3896a GK |
885 | For each variable, there is an _log variant which is the power |
886 | of two not less than the variable, for .align output. */ | |
887 | ||
888 | int align_loops; | |
889 | int align_loops_log; | |
2cca7283 | 890 | int align_loops_max_skip; |
efa3896a GK |
891 | int align_jumps; |
892 | int align_jumps_log; | |
2cca7283 | 893 | int align_jumps_max_skip; |
efa3896a GK |
894 | int align_labels; |
895 | int align_labels_log; | |
2cca7283 | 896 | int align_labels_max_skip; |
efa3896a GK |
897 | int align_functions; |
898 | int align_functions_log; | |
899 | ||
b8468bc7 | 900 | /* Table of supported debugging formats. */ |
8b60264b | 901 | static const struct |
b8468bc7 | 902 | { |
8b60264b | 903 | const char *const arg; |
b8468bc7 NC |
904 | /* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a |
905 | constant expression, we use NO_DEBUG in its place. */ | |
8b60264b KG |
906 | const enum debug_info_type debug_type; |
907 | const int use_extensions_p; | |
908 | const char *const description; | |
b8468bc7 NC |
909 | } *da, |
910 | debug_args[] = | |
911 | { | |
39dd8003 | 912 | { "", NO_DEBUG, DEFAULT_GDB_EXTENSIONS, |
a6371940 ZW |
913 | N_("Generate debugging info in default format") }, |
914 | { "gdb", NO_DEBUG, 1, N_("Generate debugging info in default extended format") }, | |
b8468bc7 | 915 | #ifdef DBX_DEBUGGING_INFO |
a6371940 ZW |
916 | { "stabs", DBX_DEBUG, 0, N_("Generate STABS format debug info") }, |
917 | { "stabs+", DBX_DEBUG, 1, N_("Generate extended STABS format debug info") }, | |
b8468bc7 NC |
918 | #endif |
919 | #ifdef DWARF_DEBUGGING_INFO | |
a6371940 | 920 | { "dwarf", DWARF_DEBUG, 0, N_("Generate DWARF-1 format debug info") }, |
39dd8003 | 921 | { "dwarf+", DWARF_DEBUG, 1, |
a6371940 | 922 | N_("Generate extended DWARF-1 format debug info") }, |
b8468bc7 NC |
923 | #endif |
924 | #ifdef DWARF2_DEBUGGING_INFO | |
a6371940 | 925 | { "dwarf-2", DWARF2_DEBUG, 0, N_("Generate DWARF-2 debug info") }, |
b8468bc7 NC |
926 | #endif |
927 | #ifdef XCOFF_DEBUGGING_INFO | |
a6371940 ZW |
928 | { "xcoff", XCOFF_DEBUG, 0, N_("Generate XCOFF format debug info") }, |
929 | { "xcoff+", XCOFF_DEBUG, 1, N_("Generate extended XCOFF format debug info") }, | |
b8468bc7 NC |
930 | #endif |
931 | #ifdef SDB_DEBUGGING_INFO | |
a6371940 | 932 | { "coff", SDB_DEBUG, 0, N_("Generate COFF format debug info") }, |
b8468bc7 | 933 | #endif |
c84e2712 | 934 | { 0, 0, 0, 0 } |
b8468bc7 NC |
935 | }; |
936 | ||
937 | typedef struct | |
938 | { | |
c083a819 KG |
939 | const char *const string; |
940 | int *const variable; | |
941 | const int on_value; | |
942 | const char *const description; | |
b8468bc7 NC |
943 | } |
944 | lang_independent_options; | |
945 | ||
91ce572a CC |
946 | int flag_trapv = 0; |
947 | ||
19283265 RH |
948 | /* Add or remove a leading underscore from user symbols. */ |
949 | int flag_leading_underscore = -1; | |
950 | ||
951 | /* The user symbol prefix after having resolved same. */ | |
87e11268 | 952 | const char *user_label_prefix; |
19283265 | 953 | |
c6d9a88c MM |
954 | static const param_info lang_independent_params[] = { |
955 | #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT) \ | |
1c4c47db | 956 | { OPTION, DEFAULT, HELP }, |
c6d9a88c MM |
957 | #include "params.def" |
958 | #undef DEFPARAM | |
1c4c47db | 959 | { NULL, 0, NULL } |
c6d9a88c MM |
960 | }; |
961 | ||
19283265 RH |
962 | /* A default for same. */ |
963 | #ifndef USER_LABEL_PREFIX | |
964 | #define USER_LABEL_PREFIX "" | |
965 | #endif | |
966 | ||
4291d9c8 RS |
967 | /* Table of language-independent -f options. |
968 | STRING is the option name. VARIABLE is the address of the variable. | |
969 | ON_VALUE is the value to store in VARIABLE | |
970 | if `-fSTRING' is seen as an option. | |
971 | (If `-fno-STRING' is seen as an option, the opposite value is stored.) */ | |
972 | ||
c083a819 | 973 | static const lang_independent_options f_options[] = |
4291d9c8 | 974 | { |
21c7361e | 975 | {"eliminate-dwarf2-dups", &flag_eliminate_dwarf2_dups, 1, |
a6371940 | 976 | N_("Perform DWARF2 duplicate elimination") }, |
b8468bc7 | 977 | {"float-store", &flag_float_store, 1, |
a6371940 | 978 | N_("Do not store floats in registers") }, |
b8468bc7 | 979 | {"volatile", &flag_volatile, 1, |
a6371940 | 980 | N_("Consider all mem refs through pointers as volatile") }, |
b8468bc7 | 981 | {"volatile-global", &flag_volatile_global, 1, |
a6371940 | 982 | N_("Consider all mem refs to global data to be volatile") }, |
ab87f8c8 | 983 | {"volatile-static", &flag_volatile_static, 1, |
a6371940 | 984 | N_("Consider all mem refs to static data to be volatile") }, |
b8468bc7 | 985 | {"defer-pop", &flag_defer_pop, 1, |
a6371940 | 986 | N_("Defer popping functions args from stack until later") }, |
b8468bc7 | 987 | {"omit-frame-pointer", &flag_omit_frame_pointer, 1, |
a6371940 | 988 | N_("When possible do not generate stack frames") }, |
db8cb48e | 989 | {"optimize-sibling-calls", &flag_optimize_sibling_calls, 1, |
a6371940 | 990 | N_("Optimize sibling and tail recursive calls") }, |
b8468bc7 | 991 | {"cse-follow-jumps", &flag_cse_follow_jumps, 1, |
a6371940 | 992 | N_("When running CSE, follow jumps to their targets") }, |
b8468bc7 | 993 | {"cse-skip-blocks", &flag_cse_skip_blocks, 1, |
a6371940 | 994 | N_("When running CSE, follow conditional jumps") }, |
b8468bc7 | 995 | {"expensive-optimizations", &flag_expensive_optimizations, 1, |
1737c953 | 996 | N_("Perform a number of minor, expensive optimizations") }, |
b8468bc7 | 997 | {"thread-jumps", &flag_thread_jumps, 1, |
1737c953 | 998 | N_("Perform jump threading optimizations") }, |
b8468bc7 | 999 | {"strength-reduce", &flag_strength_reduce, 1, |
1737c953 | 1000 | N_("Perform strength reduction optimizations") }, |
b8468bc7 | 1001 | {"unroll-loops", &flag_unroll_loops, 1, |
a6371940 | 1002 | N_("Perform loop unrolling when iteration count is known") }, |
b8468bc7 | 1003 | {"unroll-all-loops", &flag_unroll_all_loops, 1, |
a6371940 | 1004 | N_("Perform loop unrolling for all loops") }, |
0dd0e980 JH |
1005 | {"prefetch-loop-arrays", &flag_prefetch_loop_arrays, 1, |
1006 | N_("Generate prefetch instructions, if available, for arrays in loops") }, | |
b8468bc7 | 1007 | {"move-all-movables", &flag_move_all_movables, 1, |
a6371940 | 1008 | N_("Force all loop invariant computations out of loops") }, |
b8468bc7 | 1009 | {"reduce-all-givs", &flag_reduce_all_givs, 1, |
a6371940 | 1010 | N_("Strength reduce all loop general induction variables") }, |
b8468bc7 | 1011 | {"writable-strings", &flag_writable_strings, 1, |
a6371940 | 1012 | N_("Store strings in writable data section") }, |
b8468bc7 | 1013 | {"peephole", &flag_no_peephole, 0, |
1737c953 | 1014 | N_("Enable machine specific peephole optimizations") }, |
b8468bc7 | 1015 | {"force-mem", &flag_force_mem, 1, |
a6371940 | 1016 | N_("Copy memory operands into registers before using") }, |
b8468bc7 | 1017 | {"force-addr", &flag_force_addr, 1, |
a6371940 | 1018 | N_("Copy memory address constants into regs before using") }, |
b8468bc7 | 1019 | {"function-cse", &flag_no_function_cse, 0, |
a6371940 | 1020 | N_("Allow function addresses to be held in registers") }, |
b8468bc7 | 1021 | {"inline-functions", &flag_inline_functions, 1, |
a6371940 | 1022 | N_("Integrate simple functions into their callers") }, |
b8468bc7 | 1023 | {"keep-inline-functions", &flag_keep_inline_functions, 1, |
a6371940 | 1024 | N_("Generate code for funcs even if they are fully inlined") }, |
b8468bc7 | 1025 | {"inline", &flag_no_inline, 0, |
a6371940 | 1026 | N_("Pay attention to the 'inline' keyword") }, |
b8468bc7 | 1027 | {"keep-static-consts", &flag_keep_static_consts, 1, |
a6371940 | 1028 | N_("Emit static const variables even if they are not used") }, |
b8468bc7 | 1029 | {"syntax-only", &flag_syntax_only, 1, |
a6371940 | 1030 | N_("Check for syntax errors, then stop") }, |
b8468bc7 | 1031 | {"shared-data", &flag_shared_data, 1, |
a6371940 | 1032 | N_("Mark data as shared rather than private") }, |
b8468bc7 | 1033 | {"caller-saves", &flag_caller_saves, 1, |
a6371940 | 1034 | N_("Enable saving registers around function calls") }, |
b8468bc7 | 1035 | {"pcc-struct-return", &flag_pcc_struct_return, 1, |
a6371940 | 1036 | N_("Return 'short' aggregates in memory, not registers") }, |
b8468bc7 | 1037 | {"reg-struct-return", &flag_pcc_struct_return, 0, |
a6371940 | 1038 | N_("Return 'short' aggregates in registers") }, |
b8468bc7 | 1039 | {"delayed-branch", &flag_delayed_branch, 1, |
a6371940 | 1040 | N_("Attempt to fill delay slots of branch instructions") }, |
b8468bc7 | 1041 | {"gcse", &flag_gcse, 1, |
a6371940 | 1042 | N_("Perform the global common subexpression elimination") }, |
a13d4ebf | 1043 | {"gcse-lm", &flag_gcse_lm, 1, |
a6371940 | 1044 | N_("Perform enhanced load motion during global subexpression elimination") }, |
a13d4ebf | 1045 | {"gcse-sm", &flag_gcse_sm, 1, |
a6371940 | 1046 | N_("Perform store motion after global subexpression elimination") }, |
b8468bc7 | 1047 | {"rerun-cse-after-loop", &flag_rerun_cse_after_loop, 1, |
1737c953 | 1048 | N_("Run CSE pass after loop optimizations") }, |
b8468bc7 | 1049 | {"rerun-loop-opt", &flag_rerun_loop_opt, 1, |
1737c953 | 1050 | N_("Run the loop optimizer twice") }, |
b6d24183 | 1051 | {"delete-null-pointer-checks", &flag_delete_null_pointer_checks, 1, |
a6371940 | 1052 | N_("Delete useless null pointer checks") }, |
b8468bc7 | 1053 | {"pretend-float", &flag_pretend_float, 1, |
a6371940 | 1054 | N_("Pretend that host and target use the same FP format") }, |
b8468bc7 | 1055 | {"schedule-insns", &flag_schedule_insns, 1, |
a6371940 | 1056 | N_("Reschedule instructions before register allocation") }, |
b8468bc7 | 1057 | {"schedule-insns2", &flag_schedule_insns_after_reload, 1, |
a6371940 | 1058 | N_("Reschedule instructions after register allocation") }, |
b8468bc7 | 1059 | {"sched-interblock",&flag_schedule_interblock, 1, |
a6371940 | 1060 | N_("Enable scheduling across basic blocks") }, |
b8468bc7 | 1061 | {"sched-spec",&flag_schedule_speculative, 1, |
a6371940 | 1062 | N_("Allow speculative motion of non-loads") }, |
b8468bc7 | 1063 | {"sched-spec-load",&flag_schedule_speculative_load, 1, |
a6371940 | 1064 | N_("Allow speculative motion of some loads") }, |
b8468bc7 | 1065 | {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous, 1, |
a6371940 | 1066 | N_("Allow speculative motion of more loads") }, |
b8468bc7 | 1067 | {"branch-count-reg",&flag_branch_on_count_reg, 1, |
a6371940 | 1068 | N_("Replace add,compare,branch with branch on count reg") }, |
b8468bc7 | 1069 | {"pic", &flag_pic, 1, |
a6371940 | 1070 | N_("Generate position independent code, if possible") }, |
b8468bc7 NC |
1071 | {"PIC", &flag_pic, 2, ""}, |
1072 | {"exceptions", &flag_exceptions, 1, | |
a6371940 | 1073 | N_("Enable exception handling") }, |
14a774a9 | 1074 | {"unwind-tables", &flag_unwind_tables, 1, |
a6371940 | 1075 | N_("Just generate unwind tables for exception handling") }, |
b932f770 JH |
1076 | {"asynchronous-unwind-tables", &flag_asynchronous_unwind_tables, 1, |
1077 | N_("Generate unwind tables exact at each instruction boundary") }, | |
c1e9f663 | 1078 | {"non-call-exceptions", &flag_non_call_exceptions, 1, |
a6371940 | 1079 | N_("Support synchronous non-call exceptions") }, |
b8468bc7 | 1080 | {"profile-arcs", &profile_arc_flag, 1, |
a6371940 | 1081 | N_("Insert arc based program profiling code") }, |
b8468bc7 | 1082 | {"test-coverage", &flag_test_coverage, 1, |
a6371940 | 1083 | N_("Create data files needed by gcov") }, |
b8468bc7 | 1084 | {"branch-probabilities", &flag_branch_probabilities, 1, |
a6371940 | 1085 | N_("Use profiling information for branch probabilities") }, |
11bdd2ae | 1086 | {"reorder-blocks", &flag_reorder_blocks, 1, |
a6371940 | 1087 | N_("Reorder basic blocks to improve code placement") }, |
7b82b5da | 1088 | {"rename-registers", &flag_rename_registers, 1, |
a6371940 | 1089 | N_("Do the register renaming optimization pass") }, |
8582c27b RH |
1090 | {"cprop-registers", &flag_cprop_registers, 1, |
1091 | N_("Do the register copy-propagation optimization pass") }, | |
b8468bc7 | 1092 | {"common", &flag_no_common, 0, |
ff7cc307 | 1093 | N_("Do not put uninitialized globals in the common section") }, |
b8468bc7 | 1094 | {"inhibit-size-directive", &flag_inhibit_size_directive, 1, |
a6371940 | 1095 | N_("Do not generate .size directives") }, |
b8468bc7 | 1096 | {"function-sections", &flag_function_sections, 1, |
a6371940 | 1097 | N_("place each function into its own section") }, |
257441db | 1098 | {"data-sections", &flag_data_sections, 1, |
a6371940 | 1099 | N_("place data items into their own section") }, |
b8468bc7 | 1100 | {"verbose-asm", &flag_verbose_asm, 1, |
a6371940 | 1101 | N_("Add extra commentry to assembler output") }, |
b8468bc7 | 1102 | {"gnu-linker", &flag_gnu_linker, 1, |
1737c953 | 1103 | N_("Output GNU ld formatted global initializers") }, |
b8468bc7 | 1104 | {"regmove", &flag_regmove, 1, |
1737c953 | 1105 | N_("Enables a register move optimization") }, |
c84e2712 | 1106 | {"optimize-register-move", &flag_regmove, 1, |
a6371940 | 1107 | N_("Do the full regmove optimization pass") }, |
b8468bc7 | 1108 | {"pack-struct", &flag_pack_struct, 1, |
a6371940 | 1109 | N_("Pack structure members together without holes") }, |
b8468bc7 | 1110 | {"stack-check", &flag_stack_check, 1, |
a6371940 | 1111 | N_("Insert stack checking code into the program") }, |
b8468bc7 | 1112 | {"argument-alias", &flag_argument_noalias, 0, |
a6371940 | 1113 | N_("Specify that arguments may alias each other & globals") }, |
b8468bc7 | 1114 | {"argument-noalias", &flag_argument_noalias, 1, |
a6371940 | 1115 | N_("Assume arguments may alias globals but not each other") }, |
b8468bc7 | 1116 | {"argument-noalias-global", &flag_argument_noalias, 2, |
a6371940 | 1117 | N_("Assume arguments do not alias each other or globals") }, |
b8468bc7 | 1118 | {"strict-aliasing", &flag_strict_aliasing, 1, |
a6371940 | 1119 | N_("Assume strict aliasing rules apply") }, |
854a97f0 | 1120 | {"align-loops", &align_loops, 0, |
a6371940 | 1121 | N_("Align the start of loops") }, |
854a97f0 | 1122 | {"align-jumps", &align_jumps, 0, |
a6371940 | 1123 | N_("Align labels which are only reached by jumping") }, |
efa3896a | 1124 | {"align-labels", &align_labels, 0, |
a6371940 | 1125 | N_("Align all labels") }, |
efa3896a | 1126 | {"align-functions", &align_functions, 0, |
a6371940 | 1127 | N_("Align the start of functions") }, |
201556f0 JJ |
1128 | {"merge-constants", &flag_merge_constants, 1, |
1129 | N_("Attempt to merge identical constants accross compilation units") }, | |
1130 | {"merge-all-constants", &flag_merge_constants, 2, | |
1131 | N_("Attempt to merge identical constants and constant variables") }, | |
c84e2712 | 1132 | {"dump-unnumbered", &flag_dump_unnumbered, 1, |
a6371940 | 1133 | N_("Suppress output of instruction numbers and line number notes in debugging dumps") }, |
07417085 | 1134 | {"instrument-functions", &flag_instrument_function_entry_exit, 1, |
a6371940 | 1135 | N_("Instrument function entry/exit with profiling calls") }, |
d9d4fb43 | 1136 | {"ssa", &flag_ssa, 1, |
a6371940 | 1137 | N_("Enable SSA optimizations") }, |
0b47e4c1 | 1138 | {"ssa-ccp", &flag_ssa_ccp, 1, |
eaec9b3d | 1139 | N_("Enable SSA conditional constant propagation") }, |
62d285ff JL |
1140 | {"ssa-dce", &flag_ssa_dce, 1, |
1141 | N_("Enable aggressive SSA dead code elimination") }, | |
19283265 | 1142 | {"leading-underscore", &flag_leading_underscore, 1, |
a6371940 | 1143 | N_("External symbols have a leading underscore") }, |
be163a70 | 1144 | {"ident", &flag_no_ident, 0, |
a6371940 | 1145 | N_("Process #ident directives") }, |
ede7cd44 | 1146 | { "peephole2", &flag_peephole2, 1, |
a6371940 | 1147 | N_("Enables an rtl peephole pass run before sched2") }, |
3ff51205 | 1148 | { "guess-branch-probability", &flag_guess_branch_prob, 1, |
a6371940 | 1149 | N_("Enables guessing of branch probabilities") }, |
9605da8a | 1150 | {"math-errno", &flag_errno_math, 1, |
a6371940 | 1151 | N_("Set errno after built-in math functions") }, |
de6c5979 | 1152 | {"trapping-math", &flag_trapping_math, 1, |
a6371940 | 1153 | N_("Floating-point operations can trap") }, |
de6c5979 | 1154 | {"unsafe-math-optimizations", &flag_unsafe_math_optimizations, 1, |
a6371940 | 1155 | N_("Allow math optimizations that may violate IEEE or ANSI standards") }, |
a8aa7975 | 1156 | {"bounded-pointers", &flag_bounded_pointers, 1, |
a6371940 | 1157 | N_("Compile pointers as triples: value, base & end") }, |
a8aa7975 | 1158 | {"bounds-check", &flag_bounds_check, 1, |
a6371940 | 1159 | N_("Generate code to check bounds before dereferencing pointers and arrays") }, |
46d3a873 | 1160 | {"single-precision-constant", &flag_single_precision_constant, 1, |
a6371940 | 1161 | N_("Convert floating point constant to single precision constant") }, |
94b23dd5 | 1162 | {"time-report", &time_report, 1, |
a6371940 | 1163 | N_("Report time taken by each compiler pass at end of run") }, |
94b23dd5 | 1164 | {"mem-report", &mem_report, 1, |
a6371940 | 1165 | N_("Report on permanent memory allocation at end of run") }, |
91ce572a | 1166 | { "trapv", &flag_trapv, 1, |
4d6baafa | 1167 | N_("Trap for signed overflow in addition / subtraction / multiplication") }, |
4291d9c8 | 1168 | }; |
b99933c7 RS |
1169 | |
1170 | /* Table of language-specific options. */ | |
1171 | ||
8b60264b | 1172 | static const struct lang_opt |
b8468bc7 | 1173 | { |
8b60264b KG |
1174 | const char *const option; |
1175 | const char *const description; | |
b8468bc7 NC |
1176 | } |
1177 | documented_lang_options[] = | |
b99933c7 | 1178 | { |
b8468bc7 NC |
1179 | /* In order not to overload the --help output, the convention |
1180 | used here is to only describe those options which are not | |
1181 | enabled by default. */ | |
1182 | ||
a6371940 ZW |
1183 | { "-ansi", |
1184 | N_("Compile just for ISO C89") }, | |
b8468bc7 | 1185 | { "-fallow-single-precision", |
a6371940 ZW |
1186 | N_("Do not promote floats to double if using -traditional") }, |
1187 | { "-std= ", | |
1188 | N_("Determine language standard") }, | |
b8468bc7 NC |
1189 | |
1190 | { "-fsigned-bitfields", "" }, | |
a6371940 | 1191 | { "-funsigned-bitfields", |
b0287a90 | 1192 | N_("Make bit-fields by unsigned by default") }, |
b8468bc7 NC |
1193 | { "-fno-signed-bitfields", "" }, |
1194 | { "-fno-unsigned-bitfields","" }, | |
a6371940 ZW |
1195 | { "-fsigned-char", |
1196 | N_("Make 'char' be signed by default") }, | |
1197 | { "-funsigned-char", | |
1198 | N_("Make 'char' be unsigned by default") }, | |
b8468bc7 NC |
1199 | { "-fno-signed-char", "" }, |
1200 | { "-fno-unsigned-char", "" }, | |
1201 | ||
1202 | { "-ftraditional", "" }, | |
a6371940 ZW |
1203 | { "-traditional", |
1204 | N_("Attempt to support traditional K&R style C") }, | |
b8468bc7 NC |
1205 | { "-fnotraditional", "" }, |
1206 | { "-fno-traditional", "" }, | |
1207 | ||
1208 | { "-fasm", "" }, | |
a6371940 | 1209 | { "-fno-asm", |
1737c953 | 1210 | N_("Do not recognize the 'asm' keyword") }, |
b8468bc7 | 1211 | { "-fbuiltin", "" }, |
a6371940 | 1212 | { "-fno-builtin", |
1737c953 | 1213 | N_("Do not recognize any built in functions") }, |
a6371940 ZW |
1214 | { "-fhosted", |
1215 | N_("Assume normal C execution environment") }, | |
b8468bc7 NC |
1216 | { "-fno-hosted", "" }, |
1217 | { "-ffreestanding", | |
a6371940 | 1218 | N_("Assume that standard libraries & main might not exist") }, |
b8468bc7 | 1219 | { "-fno-freestanding", "" }, |
a6371940 ZW |
1220 | { "-fcond-mismatch", |
1221 | N_("Allow different types as args of ? operator") }, | |
b8468bc7 | 1222 | { "-fno-cond-mismatch", "" }, |
a6371940 ZW |
1223 | { "-fdollars-in-identifiers", |
1224 | N_("Allow the use of $ inside identifiers") }, | |
b8468bc7 | 1225 | { "-fno-dollars-in-identifiers", "" }, |
3773a46b JM |
1226 | { "-fpreprocessed", "" }, |
1227 | { "-fno-preprocessed", "" }, | |
a6371940 ZW |
1228 | { "-fshort-double", |
1229 | N_("Use the same size for double as for float") }, | |
b8468bc7 | 1230 | { "-fno-short-double", "" }, |
a6371940 ZW |
1231 | { "-fshort-enums", |
1232 | N_("Use the smallest fitting integer to hold enums") }, | |
b8468bc7 | 1233 | { "-fno-short-enums", "" }, |
a6371940 ZW |
1234 | { "-fshort-wchar", |
1235 | N_("Override the underlying type for wchar_t to `unsigned short'") }, | |
12a39b12 | 1236 | { "-fno-short-wchar", "" }, |
b8468bc7 | 1237 | |
a6371940 ZW |
1238 | { "-Wall", |
1239 | N_("Enable most warning messages") }, | |
b8468bc7 | 1240 | { "-Wbad-function-cast", |
a6371940 | 1241 | N_("Warn about casting functions to incompatible types") }, |
b8468bc7 | 1242 | { "-Wno-bad-function-cast", "" }, |
0ca3fb0a | 1243 | { "-Wno-missing-noreturn", "" }, |
74ff4629 | 1244 | { "-Wmissing-format-attribute", |
a6371940 | 1245 | N_("Warn about functions which might be candidates for format attributes") }, |
74ff4629 | 1246 | { "-Wno-missing-format-attribute", "" }, |
a6371940 ZW |
1247 | { "-Wcast-qual", |
1248 | N_("Warn about casts which discard qualifiers") }, | |
b8468bc7 | 1249 | { "-Wno-cast-qual", "" }, |
a6371940 ZW |
1250 | { "-Wchar-subscripts", |
1251 | N_("Warn about subscripts whose type is 'char'") }, | |
b8468bc7 | 1252 | { "-Wno-char-subscripts", "" }, |
a6371940 ZW |
1253 | { "-Wcomment", |
1254 | N_("Warn if nested comments are detected") }, | |
c84e2712 | 1255 | { "-Wno-comment", "" }, |
a6371940 ZW |
1256 | { "-Wcomments", |
1257 | N_("Warn if nested comments are detected") }, | |
c84e2712 | 1258 | { "-Wno-comments", "" }, |
a6371940 ZW |
1259 | { "-Wconversion", |
1260 | N_("Warn about possibly confusing type conversions") }, | |
b8468bc7 | 1261 | { "-Wno-conversion", "" }, |
a6371940 ZW |
1262 | { "-Wformat", |
1263 | N_("Warn about printf/scanf/strftime/strfmon format anomalies") }, | |
b8468bc7 | 1264 | { "-Wno-format", "" }, |
4d808927 JM |
1265 | { "-Wformat-y2k", "" }, |
1266 | { "-Wno-format-y2k", | |
a6371940 | 1267 | N_("Don't warn about strftime formats yielding 2 digit years") }, |
4d808927 JM |
1268 | { "-Wformat-extra-args", "" }, |
1269 | { "-Wno-format-extra-args", | |
a6371940 ZW |
1270 | N_("Don't warn about too many arguments to format functions") }, |
1271 | { "-Wformat-nonliteral", | |
1272 | N_("Warn about non-string-literal format strings") }, | |
4d808927 | 1273 | { "-Wno-format-nonliteral", "" }, |
c907e684 | 1274 | { "-Wformat-security", |
a6371940 | 1275 | N_("Warn about possible security problems with format functions") }, |
c907e684 | 1276 | { "-Wno-format-security", "" }, |
b8468bc7 | 1277 | { "-Wimplicit-function-declaration", |
a6371940 | 1278 | N_("Warn about implicit function declarations") }, |
b8468bc7 NC |
1279 | { "-Wno-implicit-function-declaration", "" }, |
1280 | { "-Werror-implicit-function-declaration", "" }, | |
a6371940 ZW |
1281 | { "-Wimplicit-int", |
1282 | N_("Warn when a declaration does not specify a type") }, | |
b8468bc7 NC |
1283 | { "-Wno-implicit-int", "" }, |
1284 | { "-Wimplicit", "" }, | |
1285 | { "-Wno-implicit", "" }, | |
a6371940 ZW |
1286 | { "-Wimport", |
1287 | N_("Warn about the use of the #import directive") }, | |
b8468bc7 NC |
1288 | { "-Wno-import", "" }, |
1289 | { "-Wlong-long","" }, | |
a6371940 ZW |
1290 | { "-Wno-long-long", |
1291 | N_("Do not warn about using 'long long' when -pedantic") }, | |
1292 | { "-Wmain", | |
1293 | N_("Warn about suspicious declarations of main") }, | |
b8468bc7 NC |
1294 | { "-Wno-main", "" }, |
1295 | { "-Wmissing-braces", | |
1737c953 | 1296 | N_("Warn about possibly missing braces around initializers") }, |
b8468bc7 NC |
1297 | { "-Wno-missing-braces", "" }, |
1298 | { "-Wmissing-declarations", | |
a6371940 | 1299 | N_("Warn about global funcs without previous declarations") }, |
b8468bc7 | 1300 | { "-Wno-missing-declarations", "" }, |
a6371940 ZW |
1301 | { "-Wmissing-prototypes", |
1302 | N_("Warn about global funcs without prototypes") }, | |
b8468bc7 | 1303 | { "-Wno-missing-prototypes", "" }, |
a6371940 ZW |
1304 | { "-Wmultichar", |
1305 | N_("Warn about use of multicharacter literals") }, | |
b8468bc7 | 1306 | { "-Wno-multichar", "" }, |
a6371940 ZW |
1307 | { "-Wnested-externs", |
1308 | N_("Warn about externs not at file scope level") }, | |
b8468bc7 | 1309 | { "-Wno-nested-externs", "" }, |
a6371940 ZW |
1310 | { "-Wparentheses", |
1311 | N_("Warn about possible missing parentheses") }, | |
b8468bc7 | 1312 | { "-Wno-parentheses", "" }, |
bb58bec5 | 1313 | { "-Wsequence-point", |
a6371940 | 1314 | N_("Warn about possible violations of sequence point rules") }, |
bb58bec5 | 1315 | { "-Wno-sequence-point", "" }, |
a6371940 ZW |
1316 | { "-Wpointer-arith", |
1317 | N_("Warn about function pointer arithmetic") }, | |
b8468bc7 NC |
1318 | { "-Wno-pointer-arith", "" }, |
1319 | { "-Wredundant-decls", | |
a6371940 | 1320 | N_("Warn about multiple declarations of the same object") }, |
b8468bc7 | 1321 | { "-Wno-redundant-decls", "" }, |
a6371940 ZW |
1322 | { "-Wsign-compare", |
1323 | N_("Warn about signed/unsigned comparisons") }, | |
b8468bc7 | 1324 | { "-Wno-sign-compare", "" }, |
a6371940 ZW |
1325 | { "-Wfloat-equal", |
1326 | N_("Warn about testing equality of floating point numbers") }, | |
b843d210 | 1327 | { "-Wno-float-equal", "" }, |
a6371940 ZW |
1328 | { "-Wunknown-pragmas", |
1329 | N_("Warn about unrecognized pragmas") }, | |
b8468bc7 | 1330 | { "-Wno-unknown-pragmas", "" }, |
a6371940 ZW |
1331 | { "-Wstrict-prototypes", |
1332 | N_("Warn about non-prototyped function decls") }, | |
b8468bc7 | 1333 | { "-Wno-strict-prototypes", "" }, |
a6371940 ZW |
1334 | { "-Wtraditional", |
1335 | N_("Warn about constructs whose meaning change in ISO C") }, | |
b8468bc7 | 1336 | { "-Wno-traditional", "" }, |
a6371940 ZW |
1337 | { "-Wtrigraphs", |
1338 | N_("Warn when trigraphs are encountered") }, | |
b8468bc7 NC |
1339 | { "-Wno-trigraphs", "" }, |
1340 | { "-Wundef", "" }, | |
1341 | { "-Wno-undef", "" }, | |
a6371940 ZW |
1342 | { "-Wwrite-strings", |
1343 | N_("Mark strings as 'const char *'") }, | |
b8468bc7 | 1344 | { "-Wno-write-strings", "" }, |
854a97f0 | 1345 | |
b8468bc7 | 1346 | #define DEFINE_LANG_NAME(NAME) { NULL, NAME }, |
854a97f0 | 1347 | |
2a95de17 | 1348 | #include "options.h" |
854a97f0 | 1349 | |
b99933c7 | 1350 | }; |
b8468bc7 NC |
1351 | |
1352 | /* Here is a table, controlled by the tm.h file, listing each -m switch | |
1353 | and which bits in `target_switches' it should set or clear. | |
1354 | If VALUE is positive, it is bits to set. | |
1355 | If VALUE is negative, -VALUE is bits to clear. | |
1356 | (The sign bit is not used so there is no confusion.) */ | |
1357 | ||
8b60264b | 1358 | static const struct |
b8468bc7 | 1359 | { |
8b60264b KG |
1360 | const char *const name; |
1361 | const int value; | |
1362 | const char *const description; | |
b8468bc7 NC |
1363 | } |
1364 | target_switches [] = TARGET_SWITCHES; | |
1365 | ||
1366 | /* This table is similar, but allows the switch to have a value. */ | |
1367 | ||
1368 | #ifdef TARGET_OPTIONS | |
8b60264b | 1369 | static const struct |
b8468bc7 | 1370 | { |
8b60264b KG |
1371 | const char *const prefix; |
1372 | const char **const variable; | |
1373 | const char *const description; | |
b8468bc7 NC |
1374 | } |
1375 | target_options [] = TARGET_OPTIONS; | |
1376 | #endif | |
4291d9c8 | 1377 | \f |
854a97f0 | 1378 | /* Options controlling warnings. */ |
4291d9c8 RS |
1379 | |
1380 | /* Don't print warning messages. -w. */ | |
1381 | ||
1382 | int inhibit_warnings = 0; | |
1383 | ||
317639a8 BC |
1384 | /* Don't suppress warnings from system headers. -Wsystem-headers. */ |
1385 | ||
1386 | int warn_system_headers = 0; | |
1387 | ||
4291d9c8 RS |
1388 | /* Print various extra warnings. -W. */ |
1389 | ||
1390 | int extra_warnings = 0; | |
1391 | ||
1392 | /* Treat warnings as errors. -Werror. */ | |
1393 | ||
1394 | int warnings_are_errors = 0; | |
1395 | ||
078721e1 | 1396 | /* Nonzero to warn about unused variables, functions et.al. */ |
4291d9c8 | 1397 | |
078721e1 AC |
1398 | int warn_unused_function; |
1399 | int warn_unused_label; | |
1400 | int warn_unused_parameter; | |
1401 | int warn_unused_variable; | |
1402 | int warn_unused_value; | |
1403 | ||
312f6255 GK |
1404 | /* Nonzero to warn about code which is never reached. */ |
1405 | ||
1406 | int warn_notreached; | |
1407 | ||
4291d9c8 RS |
1408 | /* Nonzero to warn about variables used before they are initialized. */ |
1409 | ||
1410 | int warn_uninitialized; | |
1411 | ||
6d2f8887 | 1412 | /* Nonzero means warn about all declarations which shadow others. */ |
4291d9c8 RS |
1413 | |
1414 | int warn_shadow; | |
1415 | ||
1416 | /* Warn if a switch on an enum fails to have a case for every enum value. */ | |
1417 | ||
1418 | int warn_switch; | |
1419 | ||
1420 | /* Nonzero means warn about function definitions that default the return type | |
1421 | or that use a null return and have a return-type other than void. */ | |
1422 | ||
1423 | int warn_return_type; | |
1424 | ||
1425 | /* Nonzero means warn about pointer casts that increase the required | |
1426 | alignment of the target type (and might therefore lead to a crash | |
1427 | due to a misaligned access). */ | |
1428 | ||
1429 | int warn_cast_align; | |
1430 | ||
b51e9c62 RK |
1431 | /* Nonzero means warn about any objects definitions whose size is larger |
1432 | than N bytes. Also want about function definitions whose returned | |
1433 | values are larger than N bytes. The value N is in `larger_than_size'. */ | |
854a97f0 | 1434 | |
b51e9c62 | 1435 | int warn_larger_than; |
4559fd9e | 1436 | HOST_WIDE_INT larger_than_size; |
4291d9c8 RS |
1437 | |
1438 | /* Nonzero means warn if inline function is too large. */ | |
1439 | ||
1440 | int warn_inline; | |
1441 | ||
1442 | /* Warn if a function returns an aggregate, | |
1443 | since there are often incompatible calling conventions for doing this. */ | |
1444 | ||
1445 | int warn_aggregate_return; | |
1446 | ||
3c12fcc2 GM |
1447 | /* Warn if packed attribute on struct is unnecessary and inefficient. */ |
1448 | ||
1449 | int warn_packed; | |
1450 | ||
1451 | /* Warn when gcc pads a structure to an alignment boundary. */ | |
1452 | ||
1453 | int warn_padded; | |
1454 | ||
18424ae1 BL |
1455 | /* Warn when an optimization pass is disabled. */ |
1456 | ||
1457 | int warn_disabled_optimization; | |
1458 | ||
b313a0fe RH |
1459 | /* Warn about functions which might be candidates for attribute noreturn. */ |
1460 | ||
1461 | int warn_missing_noreturn; | |
1462 | ||
e23bd218 IR |
1463 | /* Nonzero means warn about uses of __attribute__((deprecated)) |
1464 | declarations. */ | |
1465 | ||
1466 | int warn_deprecated_decl = 1; | |
1467 | ||
4291d9c8 RS |
1468 | /* Likewise for -W. */ |
1469 | ||
c083a819 | 1470 | static const lang_independent_options W_options[] = |
4291d9c8 | 1471 | { |
a6371940 ZW |
1472 | {"unused-function", &warn_unused_function, 1, |
1473 | N_("Warn when a function is unused") }, | |
1474 | {"unused-label", &warn_unused_label, 1, | |
1475 | N_("Warn when a label is unused") }, | |
1476 | {"unused-parameter", &warn_unused_parameter, 1, | |
1477 | N_("Warn when a function parameter is unused") }, | |
1478 | {"unused-variable", &warn_unused_variable, 1, | |
1479 | N_("Warn when a variable is unused") }, | |
1480 | {"unused-value", &warn_unused_value, 1, | |
1481 | N_("Warn when an expression value is unused") }, | |
1482 | {"system-headers", &warn_system_headers, 1, | |
1483 | N_("Do not suppress warnings from system headers") }, | |
1484 | {"error", &warnings_are_errors, 1, | |
1485 | N_("Treat all warnings as errors") }, | |
1486 | {"shadow", &warn_shadow, 1, | |
1487 | N_("Warn when one local variable shadows another") }, | |
b8468bc7 | 1488 | {"switch", &warn_switch, 1, |
a6371940 | 1489 | N_("Warn about enumerated switches missing a specific case") }, |
b8468bc7 | 1490 | {"aggregate-return", &warn_aggregate_return, 1, |
a6371940 | 1491 | N_("Warn about returning structures, unions or arrays") }, |
b8468bc7 | 1492 | {"cast-align", &warn_cast_align, 1, |
a6371940 | 1493 | N_("Warn about pointer casts which increase alignment") }, |
854a97f0 | 1494 | {"unreachable-code", &warn_notreached, 1, |
a6371940 | 1495 | N_("Warn about code that will never be executed") }, |
b8468bc7 | 1496 | {"uninitialized", &warn_uninitialized, 1, |
ff7cc307 | 1497 | N_("Warn about uninitialized automatic variables") }, |
b8468bc7 | 1498 | {"inline", &warn_inline, 1, |
a6371940 | 1499 | N_("Warn when an inlined function cannot be inlined") }, |
3c12fcc2 | 1500 | {"packed", &warn_packed, 1, |
a6371940 | 1501 | N_("Warn when the packed attribute has no effect on struct layout") }, |
3c12fcc2 | 1502 | {"padded", &warn_padded, 1, |
a6371940 | 1503 | N_("Warn when padding is required to align struct members") }, |
18424ae1 | 1504 | {"disabled-optimization", &warn_disabled_optimization, 1, |
a6371940 | 1505 | N_("Warn when an optimization pass is disabled") }, |
e23bd218 IR |
1506 | {"deprecated-declarations", &warn_deprecated_decl, 1, |
1507 | N_("Warn about uses of __attribute__((deprecated)) declarations") }, | |
21c7361e | 1508 | {"missing-noreturn", &warn_missing_noreturn, 1, |
a6371940 | 1509 | N_("Warn about functions which might be candidates for attribute noreturn") } |
4291d9c8 | 1510 | }; |
de6c5979 | 1511 | |
f5e99456 NB |
1512 | void |
1513 | set_Wunused (setting) | |
1514 | int setting; | |
1515 | { | |
1516 | warn_unused_function = setting; | |
1517 | warn_unused_label = setting; | |
1518 | /* Unused function parameter warnings are reported when either ``-W | |
1519 | -Wunused'' or ``-Wunused-parameter'' is specified. Differentiate | |
1520 | -Wunused by setting WARN_UNUSED_PARAMETER to -1. */ | |
1521 | if (!setting) | |
1522 | warn_unused_parameter = 0; | |
1523 | else if (!warn_unused_parameter) | |
1524 | warn_unused_parameter = -1; | |
1525 | warn_unused_variable = setting; | |
1526 | warn_unused_value = setting; | |
1527 | } | |
1528 | ||
de6c5979 BL |
1529 | /* The following routines are useful in setting all the flags that |
1530 | -ffast-math and -fno-fast-math imply. */ | |
1531 | ||
1532 | void | |
1533 | set_fast_math_flags () | |
1534 | { | |
1535 | flag_trapping_math = 0; | |
1536 | flag_unsafe_math_optimizations = 1; | |
1537 | flag_errno_math = 0; | |
1538 | } | |
1539 | ||
1540 | void | |
1541 | set_no_fast_math_flags () | |
1542 | { | |
1543 | flag_trapping_math = 1; | |
1544 | flag_unsafe_math_optimizations = 0; | |
1545 | flag_errno_math = 1; | |
1546 | } | |
1547 | ||
4291d9c8 RS |
1548 | \f |
1549 | /* Output files for assembler code (real compiler output) | |
1550 | and debugging dumps. */ | |
1551 | ||
1552 | FILE *asm_out_file; | |
1553 | FILE *aux_info_file; | |
032713aa | 1554 | FILE *rtl_dump_file = NULL; |
4291d9c8 | 1555 | |
132e01b1 TP |
1556 | /* Decode the string P as an integral parameter. |
1557 | If the string is indeed an integer return its numeric value else | |
192babfd | 1558 | issue an Invalid Option error for the option PNAME and return DEFVAL. |
854a97f0 KH |
1559 | If PNAME is zero just return DEFVAL, do not call error. */ |
1560 | ||
132e01b1 TP |
1561 | int |
1562 | read_integral_parameter (p, pname, defval) | |
192babfd TP |
1563 | const char *p; |
1564 | const char *pname; | |
1565 | const int defval; | |
132e01b1 | 1566 | { |
192babfd | 1567 | const char *endp = p; |
132e01b1 TP |
1568 | |
1569 | while (*endp) | |
1570 | { | |
0df6c2c7 | 1571 | if (ISDIGIT (*endp)) |
132e01b1 TP |
1572 | endp++; |
1573 | else | |
192babfd TP |
1574 | break; |
1575 | } | |
1576 | ||
1577 | if (*endp != 0) | |
1578 | { | |
1579 | if (pname != 0) | |
1f978f5f | 1580 | error ("invalid option `%s'", pname); |
192babfd | 1581 | return defval; |
132e01b1 TP |
1582 | } |
1583 | ||
1584 | return atoi (p); | |
1585 | } | |
1586 | ||
4291d9c8 | 1587 | \f |
4291d9c8 RS |
1588 | /* This is the default decl_printable_name function. */ |
1589 | ||
5f8ded66 | 1590 | static const char * |
a1d7ffe3 | 1591 | decl_name (decl, verbosity) |
4291d9c8 | 1592 | tree decl; |
114791ea | 1593 | int verbosity ATTRIBUTE_UNUSED; |
4291d9c8 RS |
1594 | { |
1595 | return IDENTIFIER_POINTER (DECL_NAME (decl)); | |
1596 | } | |
1597 | \f | |
4291d9c8 RS |
1598 | |
1599 | /* This calls abort and is used to avoid problems when abort if a macro. | |
1600 | It is used when we need to pass the address of abort. */ | |
1601 | ||
1602 | void | |
1603 | do_abort () | |
1604 | { | |
1605 | abort (); | |
1606 | } | |
1607 | ||
1608 | /* When `malloc.c' is compiled with `rcheck' defined, | |
1609 | it calls this function to report clobberage. */ | |
1610 | ||
1611 | void | |
1612 | botch (s) | |
854a97f0 | 1613 | const char *s ATTRIBUTE_UNUSED; |
4291d9c8 RS |
1614 | { |
1615 | abort (); | |
1616 | } | |
4291d9c8 RS |
1617 | \f |
1618 | /* Return the logarithm of X, base 2, considering X unsigned, | |
37366632 RK |
1619 | if X is a power of 2. Otherwise, returns -1. |
1620 | ||
1621 | This should be used via the `exact_log2' macro. */ | |
4291d9c8 RS |
1622 | |
1623 | int | |
37366632 | 1624 | exact_log2_wide (x) |
b3694847 | 1625 | unsigned HOST_WIDE_INT x; |
4291d9c8 | 1626 | { |
b3694847 | 1627 | int log = 0; |
4291d9c8 RS |
1628 | /* Test for 0 or a power of 2. */ |
1629 | if (x == 0 || x != (x & -x)) | |
1630 | return -1; | |
1631 | while ((x >>= 1) != 0) | |
1632 | log++; | |
1633 | return log; | |
1634 | } | |
1635 | ||
1636 | /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X. | |
37366632 RK |
1637 | If X is 0, return -1. |
1638 | ||
1639 | This should be used via the floor_log2 macro. */ | |
4291d9c8 RS |
1640 | |
1641 | int | |
37366632 | 1642 | floor_log2_wide (x) |
b3694847 | 1643 | unsigned HOST_WIDE_INT x; |
4291d9c8 | 1644 | { |
b3694847 | 1645 | int log = -1; |
4291d9c8 RS |
1646 | while (x != 0) |
1647 | log++, | |
1648 | x >>= 1; | |
1649 | return log; | |
1650 | } | |
1651 | ||
3bbfa296 | 1652 | static int float_handler_set; |
4291d9c8 RS |
1653 | int float_handled; |
1654 | jmp_buf float_handler; | |
1655 | ||
3bbfa296 RK |
1656 | /* Signals actually come here. */ |
1657 | ||
1658 | static void | |
1659 | float_signal (signo) | |
1660 | /* If this is missing, some compilers complain. */ | |
d6f4ec51 | 1661 | int signo ATTRIBUTE_UNUSED; |
3bbfa296 RK |
1662 | { |
1663 | if (float_handled == 0) | |
a7023245 | 1664 | crash_signal (signo); |
3bbfa296 | 1665 | float_handled = 0; |
4000fada ZW |
1666 | |
1667 | /* On System-V derived systems, we must reinstall the signal handler. | |
1668 | This is harmless on BSD-derived systems. */ | |
3bbfa296 RK |
1669 | signal (SIGFPE, float_signal); |
1670 | longjmp (float_handler, 1); | |
1671 | } | |
1672 | ||
4291d9c8 RS |
1673 | /* Specify where to longjmp to when a floating arithmetic error happens. |
1674 | If HANDLER is 0, it means don't handle the errors any more. */ | |
1675 | ||
94aca342 | 1676 | static void |
4291d9c8 RS |
1677 | set_float_handler (handler) |
1678 | jmp_buf handler; | |
1679 | { | |
1680 | float_handled = (handler != 0); | |
1681 | if (handler) | |
56b89084 | 1682 | memcpy (float_handler, handler, sizeof (float_handler)); |
3bbfa296 RK |
1683 | |
1684 | if (float_handled && ! float_handler_set) | |
1685 | { | |
1686 | signal (SIGFPE, float_signal); | |
1687 | float_handler_set = 1; | |
1688 | } | |
4291d9c8 RS |
1689 | } |
1690 | ||
1a87eea2 KG |
1691 | /* This is a wrapper function for code which might elicit an |
1692 | arithmetic exception. That code should be passed in as a function | |
1693 | pointer FN, and one argument DATA. DATA is usually a struct which | |
1694 | contains the real input and output for function FN. This function | |
1695 | returns 0 (failure) if longjmp was called (i.e. an exception | |
ff7cc307 | 1696 | occurred.) It returns 1 (success) otherwise. */ |
1a87eea2 KG |
1697 | |
1698 | int | |
1699 | do_float_handler (fn, data) | |
a01da83b KH |
1700 | void (*fn) PARAMS ((PTR)); |
1701 | PTR data; | |
1a87eea2 KG |
1702 | { |
1703 | jmp_buf buf; | |
1704 | ||
1705 | if (setjmp (buf)) | |
1706 | { | |
854a97f0 KH |
1707 | /* We got here via longjmp () caused by an exception in function |
1708 | fn (). */ | |
1a87eea2 KG |
1709 | set_float_handler (NULL); |
1710 | return 0; | |
1711 | } | |
1712 | ||
1713 | set_float_handler (buf); | |
1714 | (*fn)(data); | |
1715 | set_float_handler (NULL); | |
1716 | return 1; | |
1717 | } | |
1718 | ||
a7023245 ZW |
1719 | /* Handler for fatal signals, such as SIGSEGV. These are transformed |
1720 | into ICE messages, which is much more user friendly. */ | |
4291d9c8 RS |
1721 | |
1722 | static void | |
a7023245 | 1723 | crash_signal (signo) |
a7023245 | 1724 | int signo; |
4291d9c8 | 1725 | { |
1f978f5f | 1726 | internal_error ("internal error: %s", strsignal (signo)); |
4291d9c8 RS |
1727 | } |
1728 | ||
1729 | /* Strip off a legitimate source ending from the input string NAME of | |
c62bdc79 | 1730 | length LEN. Rather than having to know the names used by all of |
2290e0ec | 1731 | our front ends, we strip off an ending of a period followed by |
854a97f0 | 1732 | up to five characters. (Java uses ".class".) */ |
4291d9c8 RS |
1733 | |
1734 | void | |
1735 | strip_off_ending (name, len) | |
1736 | char *name; | |
1737 | int len; | |
1738 | { | |
2290e0ec PB |
1739 | int i; |
1740 | for (i = 2; i < 6 && len > i; i++) | |
1741 | { | |
1742 | if (name[len - i] == '.') | |
1743 | { | |
1744 | name[len - i] = '\0'; | |
1745 | break; | |
1746 | } | |
1747 | } | |
4291d9c8 RS |
1748 | } |
1749 | ||
7dce5088 | 1750 | /* Output a quoted string. */ |
0f41302f | 1751 | |
7dce5088 PE |
1752 | void |
1753 | output_quoted_string (asm_file, string) | |
1754 | FILE *asm_file; | |
87e11268 | 1755 | const char *string; |
7dce5088 | 1756 | { |
e9a25f70 JL |
1757 | #ifdef OUTPUT_QUOTED_STRING |
1758 | OUTPUT_QUOTED_STRING (asm_file, string); | |
1759 | #else | |
7dce5088 PE |
1760 | char c; |
1761 | ||
1762 | putc ('\"', asm_file); | |
1763 | while ((c = *string++) != 0) | |
1764 | { | |
1765 | if (c == '\"' || c == '\\') | |
1766 | putc ('\\', asm_file); | |
1767 | putc (c, asm_file); | |
1768 | } | |
1769 | putc ('\"', asm_file); | |
e9a25f70 | 1770 | #endif |
7dce5088 PE |
1771 | } |
1772 | ||
4291d9c8 RS |
1773 | /* Output a file name in the form wanted by System V. */ |
1774 | ||
1775 | void | |
1776 | output_file_directive (asm_file, input_name) | |
1777 | FILE *asm_file; | |
87e11268 | 1778 | const char *input_name; |
4291d9c8 RS |
1779 | { |
1780 | int len = strlen (input_name); | |
87e11268 | 1781 | const char *na = input_name + len; |
4291d9c8 RS |
1782 | |
1783 | /* NA gets INPUT_NAME sans directory names. */ | |
1784 | while (na > input_name) | |
1785 | { | |
1a8bb3dd JL |
1786 | if (IS_DIR_SEPARATOR (na[-1])) |
1787 | break; | |
4291d9c8 RS |
1788 | na--; |
1789 | } | |
1790 | ||
1791 | #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME | |
1792 | ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file, na); | |
1793 | #else | |
1794 | #ifdef ASM_OUTPUT_SOURCE_FILENAME | |
1795 | ASM_OUTPUT_SOURCE_FILENAME (asm_file, na); | |
1796 | #else | |
7dce5088 PE |
1797 | fprintf (asm_file, "\t.file\t"); |
1798 | output_quoted_string (asm_file, na); | |
1799 | fputc ('\n', asm_file); | |
4291d9c8 RS |
1800 | #endif |
1801 | #endif | |
1802 | } | |
1803 | \f | |
61098249 RH |
1804 | /* Routine to open a dump file. Return true if the dump file is enabled. */ |
1805 | ||
1806 | static int | |
1807 | open_dump_file (index, decl) | |
1808 | enum dump_file_index index; | |
1809 | tree decl; | |
032713aa | 1810 | { |
61098249 RH |
1811 | char *dump_name; |
1812 | const char *open_arg; | |
1813 | char seq[16]; | |
1814 | ||
1815 | if (! dump_file[index].enabled) | |
1816 | return 0; | |
0f41302f | 1817 | |
2a9a326b AS |
1818 | timevar_push (TV_DUMP); |
1819 | if (rtl_dump_file != NULL) | |
1820 | fclose (rtl_dump_file); | |
854a97f0 | 1821 | |
6baf9874 | 1822 | sprintf (seq, DUMPFILE_FORMAT, index); |
61098249 | 1823 | |
2a9a326b AS |
1824 | if (! dump_file[index].initialized) |
1825 | { | |
1826 | /* If we've not initialized the files, do so now. */ | |
1827 | if (graph_dump_format != no_graph | |
1828 | && dump_file[index].graph_dump_p) | |
1829 | { | |
1830 | dump_name = concat (seq, dump_file[index].extension, NULL); | |
1831 | clean_graph_dump_file (dump_base_name, dump_name); | |
1832 | free (dump_name); | |
1833 | } | |
1834 | dump_file[index].initialized = 1; | |
1835 | open_arg = "w"; | |
1836 | } | |
1837 | else | |
1838 | open_arg = "a"; | |
61098249 | 1839 | |
2a9a326b AS |
1840 | dump_name = concat (dump_base_name, seq, |
1841 | dump_file[index].extension, NULL); | |
61098249 | 1842 | |
2a9a326b AS |
1843 | rtl_dump_file = fopen (dump_name, open_arg); |
1844 | if (rtl_dump_file == NULL) | |
400500c4 | 1845 | fatal_io_error ("can't open %s", dump_name); |
854a97f0 | 1846 | |
2a9a326b | 1847 | free (dump_name); |
032713aa | 1848 | |
2a9a326b AS |
1849 | if (decl) |
1850 | fprintf (rtl_dump_file, "\n;; Function %s\n\n", | |
1851 | decl_printable_name (decl, 2)); | |
1852 | ||
1853 | timevar_pop (TV_DUMP); | |
61098249 | 1854 | return 1; |
032713aa NC |
1855 | } |
1856 | ||
1857 | /* Routine to close a dump file. */ | |
61098249 | 1858 | |
032713aa | 1859 | static void |
61098249 RH |
1860 | close_dump_file (index, func, insns) |
1861 | enum dump_file_index index; | |
58782098 | 1862 | void (*func) PARAMS ((FILE *, rtx)); |
854a97f0 | 1863 | rtx insns; |
032713aa | 1864 | { |
61098249 RH |
1865 | if (! rtl_dump_file) |
1866 | return; | |
1867 | ||
2a9a326b AS |
1868 | timevar_push (TV_DUMP); |
1869 | if (insns | |
1870 | && graph_dump_format != no_graph | |
1871 | && dump_file[index].graph_dump_p) | |
1872 | { | |
1873 | char seq[16]; | |
1874 | char *suffix; | |
61098249 | 1875 | |
6baf9874 | 1876 | sprintf (seq, DUMPFILE_FORMAT, index); |
2a9a326b AS |
1877 | suffix = concat (seq, dump_file[index].extension, NULL); |
1878 | print_rtl_graph_with_bb (dump_base_name, suffix, insns); | |
1879 | free (suffix); | |
1880 | } | |
61098249 | 1881 | |
2a9a326b AS |
1882 | if (func && insns) |
1883 | func (rtl_dump_file, insns); | |
854a97f0 | 1884 | |
2a9a326b AS |
1885 | fflush (rtl_dump_file); |
1886 | fclose (rtl_dump_file); | |
854a97f0 | 1887 | |
2a9a326b AS |
1888 | rtl_dump_file = NULL; |
1889 | timevar_pop (TV_DUMP); | |
dfe1a916 DE |
1890 | } |
1891 | ||
32291f94 MM |
1892 | /* Do any final processing required for the declarations in VEC, of |
1893 | which there are LEN. We write out inline functions and variables | |
1894 | that have been deferred until this point, but which are required. | |
854a97f0 KH |
1895 | Returns non-zero if anything was put out. */ |
1896 | ||
32291f94 MM |
1897 | int |
1898 | wrapup_global_declarations (vec, len) | |
1899 | tree *vec; | |
1900 | int len; | |
1901 | { | |
1902 | tree decl; | |
1903 | int i; | |
1904 | int reconsider; | |
1905 | int output_something = 0; | |
1906 | ||
1907 | for (i = 0; i < len; i++) | |
1908 | { | |
1909 | decl = vec[i]; | |
854a97f0 | 1910 | |
32291f94 MM |
1911 | /* We're not deferring this any longer. */ |
1912 | DECL_DEFER_OUTPUT (decl) = 0; | |
854a97f0 | 1913 | |
32291f94 MM |
1914 | if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0 |
1915 | && incomplete_decl_finalize_hook != 0) | |
1916 | (*incomplete_decl_finalize_hook) (decl); | |
1917 | } | |
1918 | ||
1919 | /* Now emit any global variables or functions that we have been | |
1920 | putting off. We need to loop in case one of the things emitted | |
1921 | here references another one which comes earlier in the list. */ | |
1922 | do | |
1923 | { | |
1924 | reconsider = 0; | |
1925 | for (i = 0; i < len; i++) | |
1926 | { | |
1927 | decl = vec[i]; | |
1928 | ||
1929 | if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl)) | |
1930 | continue; | |
1931 | ||
1932 | /* Don't write out static consts, unless we still need them. | |
1933 | ||
1934 | We also keep static consts if not optimizing (for debugging), | |
1935 | unless the user specified -fno-keep-static-consts. | |
1936 | ??? They might be better written into the debug information. | |
1937 | This is possible when using DWARF. | |
1938 | ||
1939 | A language processor that wants static constants to be always | |
1940 | written out (even if it is not used) is responsible for | |
1941 | calling rest_of_decl_compilation itself. E.g. the C front-end | |
1942 | calls rest_of_decl_compilation from finish_decl. | |
1943 | One motivation for this is that is conventional in some | |
1944 | environments to write things like: | |
1945 | static const char rcsid[] = "... version string ..."; | |
1946 | intending to force the string to be in the executable. | |
1947 | ||
1948 | A language processor that would prefer to have unneeded | |
1949 | static constants "optimized away" would just defer writing | |
1950 | them out until here. E.g. C++ does this, because static | |
1951 | constants are often defined in header files. | |
1952 | ||
1953 | ??? A tempting alternative (for both C and C++) would be | |
1954 | to force a constant to be written if and only if it is | |
1955 | defined in a main file, as opposed to an include file. */ | |
1956 | ||
1957 | if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl) | |
8cf8d8a2 JM |
1958 | && (((! TREE_READONLY (decl) || TREE_PUBLIC (decl)) |
1959 | && !DECL_COMDAT (decl)) | |
21c7361e | 1960 | || (!optimize |
62136084 MM |
1961 | && flag_keep_static_consts |
1962 | && !DECL_ARTIFICIAL (decl)) | |
32291f94 MM |
1963 | || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))) |
1964 | { | |
1965 | reconsider = 1; | |
9714cf43 | 1966 | rest_of_decl_compilation (decl, NULL, 1, 1); |
32291f94 MM |
1967 | } |
1968 | ||
1969 | if (TREE_CODE (decl) == FUNCTION_DECL | |
1970 | && DECL_INITIAL (decl) != 0 | |
1971 | && DECL_SAVED_INSNS (decl) != 0 | |
1972 | && (flag_keep_inline_functions | |
59182242 | 1973 | || (TREE_PUBLIC (decl) && !DECL_COMDAT (decl)) |
32291f94 MM |
1974 | || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))) |
1975 | { | |
1976 | reconsider = 1; | |
32291f94 | 1977 | output_inline_function (decl); |
32291f94 MM |
1978 | } |
1979 | } | |
1980 | ||
1981 | if (reconsider) | |
1982 | output_something = 1; | |
1983 | } | |
1984 | while (reconsider); | |
1985 | ||
1986 | return output_something; | |
1987 | } | |
1988 | ||
1989 | /* Issue appropriate warnings for the global declarations in VEC (of | |
1990 | which there are LEN). Output debugging information for them. */ | |
854a97f0 | 1991 | |
32291f94 MM |
1992 | void |
1993 | check_global_declarations (vec, len) | |
1994 | tree *vec; | |
1995 | int len; | |
1996 | { | |
1997 | tree decl; | |
1998 | int i; | |
1999 | ||
2000 | for (i = 0; i < len; i++) | |
2001 | { | |
2002 | decl = vec[i]; | |
2003 | ||
2004 | if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl) | |
2005 | && ! TREE_ASM_WRITTEN (decl)) | |
2006 | /* Cancel the RTL for this decl so that, if debugging info | |
2007 | output for global variables is still to come, | |
2008 | this one will be omitted. */ | |
19e7881c | 2009 | SET_DECL_RTL (decl, NULL_RTX); |
32291f94 MM |
2010 | |
2011 | /* Warn about any function | |
2012 | declared static but not defined. | |
2013 | We don't warn about variables, | |
2014 | because many programs have static variables | |
2015 | that exist only to get some text into the object file. */ | |
2016 | if (TREE_CODE (decl) == FUNCTION_DECL | |
078721e1 | 2017 | && (warn_unused_function |
32291f94 MM |
2018 | || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))) |
2019 | && DECL_INITIAL (decl) == 0 | |
2020 | && DECL_EXTERNAL (decl) | |
2021 | && ! DECL_ARTIFICIAL (decl) | |
2022 | && ! TREE_PUBLIC (decl)) | |
2023 | { | |
2024 | if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))) | |
2025 | pedwarn_with_decl (decl, | |
2026 | "`%s' used but never defined"); | |
2027 | else | |
2028 | warning_with_decl (decl, | |
2029 | "`%s' declared `static' but never defined"); | |
2030 | /* This symbol is effectively an "extern" declaration now. */ | |
2031 | TREE_PUBLIC (decl) = 1; | |
2032 | assemble_external (decl); | |
2033 | } | |
2034 | ||
2035 | /* Warn about static fns or vars defined but not used, | |
2036 | but not about inline functions or static consts | |
2037 | since defining those in header files is normal practice. */ | |
078721e1 AC |
2038 | if (((warn_unused_function |
2039 | && TREE_CODE (decl) == FUNCTION_DECL && ! DECL_INLINE (decl)) | |
2040 | || (warn_unused_variable | |
2041 | && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl))) | |
32291f94 MM |
2042 | && ! DECL_IN_SYSTEM_HEADER (decl) |
2043 | && ! DECL_EXTERNAL (decl) | |
2044 | && ! TREE_PUBLIC (decl) | |
2045 | && ! TREE_USED (decl) | |
2046 | && (TREE_CODE (decl) == FUNCTION_DECL || ! DECL_REGISTER (decl)) | |
2047 | /* The TREE_USED bit for file-scope decls | |
2048 | is kept in the identifier, to handle multiple | |
2049 | external decls in different scopes. */ | |
2050 | && ! TREE_USED (DECL_NAME (decl))) | |
2051 | warning_with_decl (decl, "`%s' defined but not used"); | |
2052 | ||
2a9a326b | 2053 | timevar_push (TV_SYMOUT); |
2b85879e | 2054 | (*debug_hooks->global_decl) (decl); |
2a9a326b | 2055 | timevar_pop (TV_SYMOUT); |
32291f94 MM |
2056 | } |
2057 | } | |
032713aa | 2058 | |
68723fae MM |
2059 | /* Save the current INPUT_FILENAME and LINENO on the top entry in the |
2060 | INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the | |
2061 | INPUT_FILENAME and LINENO accordingly. */ | |
2062 | ||
2063 | void | |
2064 | push_srcloc (file, line) | |
3b304f5b | 2065 | const char *file; |
68723fae MM |
2066 | int line; |
2067 | { | |
2068 | struct file_stack *fs; | |
2069 | ||
2070 | if (input_file_stack) | |
2071 | { | |
2072 | input_file_stack->name = input_filename; | |
2073 | input_file_stack->line = lineno; | |
2074 | } | |
2075 | ||
2076 | fs = (struct file_stack *) xmalloc (sizeof (struct file_stack)); | |
2077 | fs->name = input_filename = file; | |
2078 | fs->line = lineno = line; | |
2079 | fs->indent_level = 0; | |
2080 | fs->next = input_file_stack; | |
2081 | input_file_stack = fs; | |
2082 | input_file_stack_tick++; | |
2083 | } | |
2084 | ||
2085 | /* Pop the top entry off the stack of presently open source files. | |
2086 | Restore the INPUT_FILENAME and LINENO from the new topmost entry on | |
2087 | the stack. */ | |
2088 | ||
2089 | void | |
2090 | pop_srcloc () | |
2091 | { | |
2092 | struct file_stack *fs; | |
854a97f0 | 2093 | |
68723fae MM |
2094 | fs = input_file_stack; |
2095 | input_file_stack = fs->next; | |
2096 | free (fs); | |
2097 | input_file_stack_tick++; | |
ebc7f293 | 2098 | /* The initial source file is never popped. */ |
68723fae MM |
2099 | if (!input_file_stack) |
2100 | abort (); | |
2101 | input_filename = input_file_stack->name; | |
2102 | lineno = input_file_stack->line; | |
2103 | } | |
2104 | ||
f5e99456 NB |
2105 | /* Compile an entire translation unit. Write a file of assembly |
2106 | output and various debugging dumps. */ | |
4291d9c8 RS |
2107 | |
2108 | static void | |
f5e99456 | 2109 | compile_file () |
4291d9c8 RS |
2110 | { |
2111 | tree globals; | |
4291d9c8 | 2112 | |
4291d9c8 RS |
2113 | /* Initialize yet another pass. */ |
2114 | ||
b93a436e | 2115 | init_final (main_input_filename); |
0d332add | 2116 | init_branch_prob (dump_base_name); |
4291d9c8 | 2117 | |
2a9a326b | 2118 | timevar_push (TV_PARSE); |
4291d9c8 RS |
2119 | |
2120 | /* Call the parser, which parses the entire file | |
2121 | (calling rest_of_compilation for each function). */ | |
7cb4ff28 | 2122 | yyparse (); |
4291d9c8 | 2123 | |
7cb4ff28 ZW |
2124 | /* In case there were missing block closers, |
2125 | get us back to the global binding level. */ | |
37207ee7 | 2126 | (*lang_hooks.clear_binding_stack) (); |
4291d9c8 RS |
2127 | |
2128 | /* Compilation is now finished except for writing | |
2129 | what's left of the symbol table output. */ | |
2130 | ||
2a9a326b | 2131 | timevar_pop (TV_PARSE); |
4291d9c8 | 2132 | |
1fe65c00 | 2133 | if (flag_syntax_only) |
22703ccc | 2134 | return; |
1fe65c00 | 2135 | |
4291d9c8 RS |
2136 | globals = getdecls (); |
2137 | ||
2138 | /* Really define vars that have had only a tentative definition. | |
2139 | Really output inline functions that must actually be callable | |
2140 | and have not been output so far. */ | |
2141 | ||
2142 | { | |
2143 | int len = list_length (globals); | |
4da896b2 | 2144 | tree *vec = (tree *) xmalloc (sizeof (tree) * len); |
4291d9c8 RS |
2145 | int i; |
2146 | tree decl; | |
2147 | ||
2148 | /* Process the decls in reverse order--earliest first. | |
2149 | Put them into VEC from back to front, then take out from front. */ | |
2150 | ||
2151 | for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl)) | |
2152 | vec[len - i - 1] = decl; | |
2153 | ||
32291f94 | 2154 | wrapup_global_declarations (vec, len); |
4291d9c8 | 2155 | |
2668793e JL |
2156 | /* This must occur after the loop to output deferred functions. Else |
2157 | the profiler initializer would not be emitted if all the functions | |
2158 | in this compilation unit were deferred. | |
2159 | ||
2160 | output_func_start_profiler can not cause any additional functions or | |
2161 | data to need to be output, so it need not be in the deferred function | |
2162 | loop above. */ | |
2163 | output_func_start_profiler (); | |
2164 | ||
6c3fce73 | 2165 | check_global_declarations (vec, len); |
4da896b2 MM |
2166 | |
2167 | /* Clean up. */ | |
2168 | free (vec); | |
4291d9c8 RS |
2169 | } |
2170 | ||
4b8af8d9 JM |
2171 | /* Write out any pending weak symbol declarations. */ |
2172 | ||
2173 | weak_finish (); | |
2174 | ||
854a97f0 | 2175 | /* Do dbx symbols. */ |
2a9a326b | 2176 | timevar_push (TV_SYMOUT); |
7f905405 | 2177 | |
0021b564 JM |
2178 | #ifdef DWARF2_UNWIND_INFO |
2179 | if (dwarf2out_do_frame ()) | |
2180 | dwarf2out_frame_finish (); | |
2181 | #endif | |
2182 | ||
e2a12aca | 2183 | (*debug_hooks->finish) (main_input_filename); |
2a9a326b | 2184 | timevar_pop (TV_SYMOUT); |
9a666dda | 2185 | |
4291d9c8 RS |
2186 | /* Output some stuff at end of file if nec. */ |
2187 | ||
2a1ee410 RH |
2188 | dw2_output_indirect_constants (); |
2189 | ||
b93a436e | 2190 | end_final (dump_base_name); |
854a97f0 | 2191 | |
51891abe | 2192 | if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities) |
61098249 | 2193 | { |
2a9a326b | 2194 | timevar_push (TV_DUMP); |
61098249 | 2195 | open_dump_file (DFI_bp, NULL); |
51891abe JH |
2196 | |
2197 | end_branch_prob (); | |
2198 | ||
61098249 | 2199 | close_dump_file (DFI_bp, NULL, NULL_RTX); |
2a9a326b | 2200 | timevar_pop (TV_DUMP); |
61098249 | 2201 | } |
854a97f0 | 2202 | |
4291d9c8 | 2203 | #ifdef ASM_FILE_END |
b93a436e | 2204 | ASM_FILE_END (asm_out_file); |
4291d9c8 RS |
2205 | #endif |
2206 | ||
acb0db7b ZW |
2207 | /* Attach a special .ident directive to the end of the file to identify |
2208 | the version of GCC which compiled this code. The format of the .ident | |
2209 | string is patterned after the ones produced by native SVR4 compilers. */ | |
2210 | #ifdef IDENT_ASM_OP | |
2211 | if (!flag_no_ident) | |
2212 | fprintf (asm_out_file, "%s\"GCC: (GNU) %s\"\n", | |
2213 | IDENT_ASM_OP, version_string); | |
2214 | #endif | |
2215 | ||
61098249 | 2216 | if (optimize > 0 && open_dump_file (DFI_combine, NULL)) |
4291d9c8 | 2217 | { |
2a9a326b AS |
2218 | timevar_push (TV_DUMP); |
2219 | dump_combine_total_stats (rtl_dump_file); | |
61098249 | 2220 | close_dump_file (DFI_combine, NULL, NULL_RTX); |
2a9a326b | 2221 | timevar_pop (TV_DUMP); |
4291d9c8 | 2222 | } |
4291d9c8 RS |
2223 | } |
2224 | \f | |
2225 | /* This is called from various places for FUNCTION_DECL, VAR_DECL, | |
2226 | and TYPE_DECL nodes. | |
2227 | ||
ef6748cb MM |
2228 | This does nothing for local (non-static) variables, unless the |
2229 | variable is a register variable with an ASMSPEC. In that case, or | |
d558416e | 2230 | if the variable is not an automatic, it sets up the RTL and |
ef6748cb MM |
2231 | outputs any assembler code (label definition, storage allocation |
2232 | and initialization). | |
4291d9c8 RS |
2233 | |
2234 | DECL is the declaration. If ASMSPEC is nonzero, it specifies | |
2235 | the assembler symbol name to be used. TOP_LEVEL is nonzero | |
2236 | if this declaration is not within a function. */ | |
2237 | ||
2238 | void | |
2239 | rest_of_decl_compilation (decl, asmspec, top_level, at_end) | |
2240 | tree decl; | |
87e11268 | 2241 | const char *asmspec; |
4291d9c8 RS |
2242 | int top_level; |
2243 | int at_end; | |
2244 | { | |
2245 | /* Declarations of variables, and of functions defined elsewhere. */ | |
2246 | ||
928eb380 RS |
2247 | /* The most obvious approach, to put an #ifndef around where |
2248 | this macro is used, doesn't work since it's inside a macro call. */ | |
2249 | #ifndef ASM_FINISH_DECLARE_OBJECT | |
2250 | #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END) | |
2251 | #endif | |
2252 | ||
4291d9c8 RS |
2253 | /* Forward declarations for nested functions are not "external", |
2254 | but we need to treat them as if they were. */ | |
216d5cdd | 2255 | if (TREE_STATIC (decl) || DECL_EXTERNAL (decl) |
4291d9c8 | 2256 | || TREE_CODE (decl) == FUNCTION_DECL) |
2a9a326b AS |
2257 | { |
2258 | timevar_push (TV_VARCONST); | |
19e7881c MM |
2259 | if (asmspec) |
2260 | make_decl_rtl (decl, asmspec); | |
8cf8d8a2 JM |
2261 | /* Don't output anything |
2262 | when a tentative file-scope definition is seen. | |
2263 | But at end of compilation, do output code for them. */ | |
2264 | if (at_end || !DECL_DEFER_OUTPUT (decl)) | |
2265 | assemble_variable (decl, top_level, at_end, 0); | |
2a9a326b AS |
2266 | if (decl == last_assemble_variable_decl) |
2267 | { | |
2268 | ASM_FINISH_DECLARE_OBJECT (asm_out_file, decl, | |
2269 | top_level, at_end); | |
2270 | } | |
2271 | timevar_pop (TV_VARCONST); | |
2272 | } | |
216d5cdd | 2273 | else if (DECL_REGISTER (decl) && asmspec != 0) |
4291d9c8 RS |
2274 | { |
2275 | if (decode_reg_name (asmspec) >= 0) | |
2276 | { | |
19e7881c | 2277 | SET_DECL_RTL (decl, NULL_RTX); |
6c418184 | 2278 | make_decl_rtl (decl, asmspec); |
4291d9c8 RS |
2279 | } |
2280 | else | |
8f17b5c5 MM |
2281 | { |
2282 | error ("invalid register name `%s' for register variable", asmspec); | |
2283 | DECL_REGISTER (decl) = 0; | |
19e7881c MM |
2284 | if (!top_level) |
2285 | expand_decl (decl); | |
8f17b5c5 | 2286 | } |
4291d9c8 | 2287 | } |
f246a305 RS |
2288 | #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO) |
2289 | else if ((write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG) | |
2290 | && TREE_CODE (decl) == TYPE_DECL) | |
2a9a326b AS |
2291 | { |
2292 | timevar_push (TV_SYMOUT); | |
2293 | dbxout_symbol (decl, 0); | |
2294 | timevar_pop (TV_SYMOUT); | |
2295 | } | |
4291d9c8 RS |
2296 | #endif |
2297 | #ifdef SDB_DEBUGGING_INFO | |
2298 | else if (write_symbols == SDB_DEBUG && top_level | |
2299 | && TREE_CODE (decl) == TYPE_DECL) | |
2a9a326b AS |
2300 | { |
2301 | timevar_push (TV_SYMOUT); | |
2302 | sdbout_symbol (decl, 0); | |
2303 | timevar_pop (TV_SYMOUT); | |
2304 | } | |
4291d9c8 RS |
2305 | #endif |
2306 | } | |
2307 | ||
2308 | /* Called after finishing a record, union or enumeral type. */ | |
2309 | ||
2310 | void | |
2311 | rest_of_type_compilation (type, toplev) | |
114791ea | 2312 | #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) || defined (SDB_DEBUGGING_INFO) |
4291d9c8 RS |
2313 | tree type; |
2314 | int toplev; | |
114791ea KG |
2315 | #else |
2316 | tree type ATTRIBUTE_UNUSED; | |
2317 | int toplev ATTRIBUTE_UNUSED; | |
2318 | #endif | |
4291d9c8 | 2319 | { |
2a9a326b | 2320 | timevar_push (TV_SYMOUT); |
f246a305 RS |
2321 | #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO) |
2322 | if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG) | |
2a9a326b | 2323 | dbxout_symbol (TYPE_STUB_DECL (type), !toplev); |
4291d9c8 RS |
2324 | #endif |
2325 | #ifdef SDB_DEBUGGING_INFO | |
2326 | if (write_symbols == SDB_DEBUG) | |
d8d1d62b | 2327 | sdbout_symbol (TYPE_STUB_DECL (type), !toplev); |
881c6935 JM |
2328 | #endif |
2329 | #ifdef DWARF2_DEBUGGING_INFO | |
7a0c8d71 DR |
2330 | if ((write_symbols == DWARF2_DEBUG |
2331 | || write_symbols == VMS_AND_DWARF2_DEBUG) | |
2332 | && toplev) | |
881c6935 | 2333 | dwarf2out_decl (TYPE_STUB_DECL (type)); |
4291d9c8 | 2334 | #endif |
2a9a326b | 2335 | timevar_pop (TV_SYMOUT); |
4291d9c8 RS |
2336 | } |
2337 | ||
2338 | /* This is called from finish_function (within yyparse) | |
2339 | after each top-level definition is parsed. | |
2340 | It is supposed to compile that function or variable | |
2341 | and output the assembler code for it. | |
2342 | After we return, the tree storage is freed. */ | |
2343 | ||
2344 | void | |
2345 | rest_of_compilation (decl) | |
2346 | tree decl; | |
2347 | { | |
b3694847 | 2348 | rtx insns; |
4291d9c8 | 2349 | int tem; |
ab40ad2b | 2350 | int failure = 0; |
c4403371 | 2351 | int rebuild_label_notes_after_reload; |
7b40bc6b | 2352 | int register_life_up_to_date; |
4291d9c8 | 2353 | |
2a9a326b AS |
2354 | timevar_push (TV_REST_OF_COMPILATION); |
2355 | ||
1b3d8f8a GK |
2356 | /* Now that we're out of the frontend, we shouldn't have any more |
2357 | CONCATs anywhere. */ | |
2358 | generating_concat_p = 0; | |
2359 | ||
d511f9d5 AO |
2360 | /* When processing delayed functions, prepare_function_start() won't |
2361 | have been run to re-initialize it. */ | |
2362 | cse_not_expected = ! optimize; | |
2363 | ||
fcd7f76b JM |
2364 | /* First, make sure that NOTE_BLOCK is set correctly for each |
2365 | NOTE_INSN_BLOCK_BEG/NOTE_INSN_BLOCK_END note. */ | |
116eebd6 MM |
2366 | if (!cfun->x_whole_function_mode_p) |
2367 | identify_blocks (); | |
fcd7f76b | 2368 | |
e619323d DM |
2369 | /* In function-at-a-time mode, we do not attempt to keep the BLOCK |
2370 | tree in sensible shape. So, we just recalculate it here. */ | |
01d939e8 | 2371 | if (cfun->x_whole_function_mode_p) |
116eebd6 | 2372 | reorder_blocks (); |
e619323d | 2373 | |
1f8f4a0b MM |
2374 | init_flow (); |
2375 | ||
4291d9c8 RS |
2376 | /* If we are reconsidering an inline function |
2377 | at the end of compilation, skip the stuff for making it inline. */ | |
2378 | ||
2379 | if (DECL_SAVED_INSNS (decl) == 0) | |
2380 | { | |
956d6950 | 2381 | int inlinable = 0; |
14a774a9 | 2382 | tree parent; |
dff01034 | 2383 | const char *lose; |
4291d9c8 | 2384 | |
14a774a9 RK |
2385 | /* If this is nested inside an inlined external function, pretend |
2386 | it was only declared. Since we cannot inline such functions, | |
2387 | generating code for this one is not only not necessary but will | |
2388 | confuse some debugging output writers. */ | |
2389 | for (parent = DECL_CONTEXT (current_function_decl); | |
854a97f0 | 2390 | parent != NULL_TREE; |
140b60b4 | 2391 | parent = get_containing_scope (parent)) |
3e038608 MM |
2392 | if (TREE_CODE (parent) == FUNCTION_DECL |
2393 | && DECL_INLINE (parent) && DECL_EXTERNAL (parent)) | |
14a774a9 RK |
2394 | { |
2395 | DECL_INITIAL (decl) = 0; | |
2396 | goto exit_rest_of_compilation; | |
2397 | } | |
2398 | ||
4291d9c8 | 2399 | /* If requested, consider whether to make this function inline. */ |
5262d6b6 | 2400 | if ((DECL_INLINE (decl) && !flag_no_inline) |
b850de4f | 2401 | || flag_inline_functions) |
2a9a326b AS |
2402 | { |
2403 | timevar_push (TV_INTEGRATION); | |
2404 | lose = function_cannot_inline_p (decl); | |
2405 | timevar_pop (TV_INTEGRATION); | |
2406 | if (lose || ! optimize) | |
2407 | { | |
2408 | if (warn_inline && DECL_INLINE (decl)) | |
2409 | warning_with_decl (decl, lose); | |
2410 | DECL_ABSTRACT_ORIGIN (decl) = 0; | |
2411 | /* Don't really compile an extern inline function. | |
2412 | If we can't make it inline, pretend | |
2413 | it was only declared. */ | |
2414 | if (DECL_EXTERNAL (decl)) | |
2415 | { | |
2416 | DECL_INITIAL (decl) = 0; | |
2417 | goto exit_rest_of_compilation; | |
2418 | } | |
2419 | } | |
2420 | else | |
2421 | /* ??? Note that this has the effect of making it look | |
2422 | like "inline" was specified for a function if we choose | |
2423 | to inline it. This isn't quite right, but it's | |
2424 | probably not worth the trouble to fix. */ | |
2425 | inlinable = DECL_INLINE (decl) = 1; | |
2426 | } | |
4291d9c8 RS |
2427 | |
2428 | insns = get_insns (); | |
2429 | ||
2430 | /* Dump the rtl code if we are dumping rtl. */ | |
2431 | ||
61098249 | 2432 | if (open_dump_file (DFI_rtl, decl)) |
032713aa | 2433 | { |
032713aa NC |
2434 | if (DECL_SAVED_INSNS (decl)) |
2435 | fprintf (rtl_dump_file, ";; (integrable)\n\n"); | |
61098249 | 2436 | close_dump_file (DFI_rtl, print_rtl, insns); |
032713aa | 2437 | } |
4291d9c8 | 2438 | |
52a11cbf RH |
2439 | /* Convert from NOTE_INSN_EH_REGION style notes, and do other |
2440 | sorts of eh initialization. Delay this until after the | |
2441 | initial rtl dump so that we can see the original nesting. */ | |
2442 | convert_from_eh_region_ranges (); | |
2443 | ||
4291d9c8 RS |
2444 | /* If function is inline, and we don't yet know whether to |
2445 | compile it by itself, defer decision till end of compilation. | |
2446 | finish_compilation will call rest_of_compilation again | |
16411ea6 | 2447 | for those functions that need to be output. Also defer those |
36edd3cc BS |
2448 | functions that we are supposed to defer. */ |
2449 | ||
fcd7f76b | 2450 | if (inlinable |
36edd3cc BS |
2451 | || (DECL_INLINE (decl) |
2452 | && ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl) | |
2453 | && ! flag_keep_inline_functions) | |
2454 | || DECL_EXTERNAL (decl)))) | |
fcd7f76b | 2455 | DECL_DEFER_OUTPUT (decl) = 1; |
951af26e | 2456 | |
f1f39752 | 2457 | if (DECL_INLINE (decl)) |
cc712abf | 2458 | /* DWARF wants separate debugging info for abstract and |
f1f39752 JM |
2459 | concrete instances of all inline functions, including those |
2460 | declared inline but not inlined, and those inlined even | |
2461 | though they weren't declared inline. Conveniently, that's | |
2462 | what DECL_INLINE means at this point. */ | |
2b85879e | 2463 | (*debug_hooks->deferred_inline_function) (decl); |
f1f39752 | 2464 | |
fcd7f76b JM |
2465 | if (DECL_DEFER_OUTPUT (decl)) |
2466 | { | |
f93dacbd | 2467 | /* If -Wreturn-type, we have to do a bit of compilation. We just |
4793dca1 | 2468 | want to call cleanup the cfg to figure out whether or not we can |
f93dacbd | 2469 | fall off the end of the function; we do the minimum amount of |
4793dca1 | 2470 | work necessary to make that safe. */ |
a701efba | 2471 | if (warn_return_type) |
937522b5 | 2472 | { |
a701efba | 2473 | int saved_optimize = optimize; |
f93dacbd | 2474 | |
a701efba | 2475 | optimize = 0; |
4793dca1 | 2476 | rebuild_jump_labels (insns); |
a701efba | 2477 | find_exception_handler_labels (); |
4793dca1 | 2478 | find_basic_blocks (insns, max_reg_num (), rtl_dump_file); |
0068fd96 | 2479 | cleanup_cfg (CLEANUP_PRE_SIBCALL | CLEANUP_PRE_LOOP); |
a701efba | 2480 | optimize = saved_optimize; |
3c030e88 | 2481 | |
f5143c46 | 2482 | /* CFG is no longer maintained up-to-date. */ |
3c030e88 | 2483 | free_bb_for_insn (); |
a701efba MM |
2484 | } |
2485 | ||
dd1ba632 JM |
2486 | current_function_nothrow = nothrow_function_p (); |
2487 | if (current_function_nothrow) | |
2488 | /* Now we know that this can't throw; set the flag for the benefit | |
2489 | of other functions later in this translation unit. */ | |
2490 | TREE_NOTHROW (current_function_decl) = 1; | |
2491 | ||
2a9a326b | 2492 | timevar_push (TV_INTEGRATION); |
f93dacbd | 2493 | save_for_inline (decl); |
2a9a326b | 2494 | timevar_pop (TV_INTEGRATION); |
49ad7cfa | 2495 | DECL_SAVED_INSNS (decl)->inlinable = inlinable; |
a701efba | 2496 | goto exit_rest_of_compilation; |
4291d9c8 RS |
2497 | } |
2498 | ||
b8471b65 | 2499 | /* If specified extern inline but we aren't inlining it, we are |
1cbe6eb6 JM |
2500 | done. This goes for anything that gets here with DECL_EXTERNAL |
2501 | set, not just things with DECL_INLINE. */ | |
2502 | if (DECL_EXTERNAL (decl)) | |
b8471b65 RK |
2503 | goto exit_rest_of_compilation; |
2504 | } | |
07af9d16 | 2505 | |
c28abdf0 RH |
2506 | /* If we're emitting a nested function, make sure its parent gets |
2507 | emitted as well. Doing otherwise confuses debug info. */ | |
2508 | { | |
2509 | tree parent; | |
2510 | for (parent = DECL_CONTEXT (current_function_decl); | |
2511 | parent != NULL_TREE; | |
2512 | parent = get_containing_scope (parent)) | |
2513 | if (TREE_CODE (parent) == FUNCTION_DECL) | |
2514 | TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (parent)) = 1; | |
2515 | } | |
2516 | ||
2517 | /* We are now committed to emitting code for this function. Do any | |
2518 | preparation, such as emitting abstract debug info for the inline | |
2519 | before it gets mangled by optimization. */ | |
2520 | if (DECL_INLINE (decl)) | |
2521 | (*debug_hooks->outlining_inline_function) (decl); | |
2522 | ||
2523 | /* Remove any notes we don't need. That will make iterating | |
2524 | over the instruction sequence faster, and allow the garbage | |
2525 | collector to reclaim the memory used by the notes. */ | |
2526 | remove_unnecessary_notes (); | |
2527 | reorder_blocks (); | |
2528 | ||
1f8f4a0b | 2529 | ggc_collect (); |
0a1c58a2 | 2530 | |
49ad7cfa BS |
2531 | /* Initialize some variables used by the optimizers. */ |
2532 | init_function_for_compilation (); | |
2533 | ||
951af26e JM |
2534 | if (! DECL_DEFER_OUTPUT (decl)) |
2535 | TREE_ASM_WRITTEN (decl) = 1; | |
4291d9c8 | 2536 | |
659e47fb AH |
2537 | /* Now that integrate will no longer see our rtl, we need not |
2538 | distinguish between the return value of this function and the | |
2539 | return value of called functions. Also, we can remove all SETs | |
2540 | of subregs of hard registers; they are only here because of | |
c0e7830f DD |
2541 | integrate. Also, we can now initialize pseudos intended to |
2542 | carry magic hard reg data throughout the function. */ | |
4291d9c8 | 2543 | rtx_equal_function_value_matters = 0; |
659e47fb | 2544 | purge_hard_subreg_sets (get_insns ()); |
c0e7830f | 2545 | emit_initial_value_sets (); |
21c7361e | 2546 | |
0045d504 | 2547 | /* Don't return yet if -Wreturn-type; we need to do cleanup_cfg. */ |
32235b30 | 2548 | if ((rtl_dump_and_exit || flag_syntax_only) && !warn_return_type) |
a18820c6 | 2549 | goto exit_rest_of_compilation; |
4291d9c8 | 2550 | |
9d9e5c09 RH |
2551 | /* We may have potential sibling or tail recursion sites. Select one |
2552 | (of possibly multiple) methods of performing the call. */ | |
2553 | if (flag_optimize_sibling_calls) | |
2554 | { | |
2a9a326b | 2555 | timevar_push (TV_JUMP); |
9d9e5c09 RH |
2556 | open_dump_file (DFI_sibling, decl); |
2557 | ||
2a9a326b | 2558 | optimize_sibling_and_tail_recursive_calls (); |
9d9e5c09 RH |
2559 | |
2560 | close_dump_file (DFI_sibling, print_rtl, get_insns ()); | |
2a9a326b | 2561 | timevar_pop (TV_JUMP); |
9d9e5c09 | 2562 | } |
2a9a326b | 2563 | |
52a11cbf RH |
2564 | /* Complete generation of exception handling code. */ |
2565 | find_exception_handler_labels (); | |
2566 | if (doing_eh (0)) | |
2567 | { | |
2568 | timevar_push (TV_JUMP); | |
2569 | open_dump_file (DFI_eh, decl); | |
2570 | ||
2571 | finish_eh_generation (); | |
2572 | ||
2573 | close_dump_file (DFI_eh, print_rtl, get_insns ()); | |
2574 | timevar_pop (TV_JUMP); | |
2575 | } | |
2576 | ||
4291d9c8 RS |
2577 | #ifdef FINALIZE_PIC |
2578 | /* If we are doing position-independent code generation, now | |
2579 | is the time to output special prologues and epilogues. | |
2580 | We do not want to do this earlier, because it just clutters | |
2581 | up inline functions with meaningless insns. */ | |
2582 | if (flag_pic) | |
2583 | FINALIZE_PIC; | |
2584 | #endif | |
2585 | ||
2586 | insns = get_insns (); | |
2587 | ||
2588 | /* Copy any shared structure that should not be shared. */ | |
d1b81779 | 2589 | unshare_all_rtl (current_function_decl, insns); |
4291d9c8 | 2590 | |
c9ec4f99 | 2591 | #ifdef SETJMP_VIA_SAVE_AREA |
fb530c07 | 2592 | /* This must be performed before virtual register instantiation. */ |
c9ec4f99 DM |
2593 | if (current_function_calls_alloca) |
2594 | optimize_save_area_alloca (insns); | |
2595 | #endif | |
2596 | ||
4291d9c8 | 2597 | /* Instantiate all virtual registers. */ |
a18820c6 | 2598 | instantiate_virtual_regs (current_function_decl, insns); |
4291d9c8 | 2599 | |
61098249 | 2600 | open_dump_file (DFI_jump, decl); |
02db399d | 2601 | |
cc4e79d8 JL |
2602 | /* Always do one jump optimization pass to ensure that JUMP_LABEL fields |
2603 | are initialized and to compute whether control can drop off the end | |
2604 | of the function. */ | |
994a57cd | 2605 | |
2a9a326b AS |
2606 | timevar_push (TV_JUMP); |
2607 | /* Turn NOTE_INSN_EXPECTED_VALUE into REG_BR_PROB. Do this | |
2608 | before jump optimization switches branch directions. */ | |
2609 | expected_value_to_br_prob (); | |
2610 | ||
2611 | reg_scan (insns, max_reg_num (), 0); | |
0045d504 JH |
2612 | rebuild_jump_labels (insns); |
2613 | find_basic_blocks (insns, max_reg_num (), rtl_dump_file); | |
0068fd96 | 2614 | cleanup_cfg ((optimize ? CLEANUP_EXPENSIVE : 0) | CLEANUP_PRE_LOOP); |
3c030e88 | 2615 | |
f5143c46 | 2616 | /* CFG is no longer maintained up-to-date. */ |
3c030e88 | 2617 | free_bb_for_insn (); |
0045d504 JH |
2618 | copy_loop_headers (insns); |
2619 | purge_line_number_notes (insns); | |
2a9a326b AS |
2620 | |
2621 | timevar_pop (TV_JUMP); | |
673b5311 | 2622 | |
32235b30 | 2623 | /* Now is when we stop if -fsyntax-only and -Wreturn-type. */ |
951af26e | 2624 | if (rtl_dump_and_exit || flag_syntax_only || DECL_DEFER_OUTPUT (decl)) |
a18820c6 RH |
2625 | { |
2626 | close_dump_file (DFI_jump, print_rtl, insns); | |
2627 | goto exit_rest_of_compilation; | |
2628 | } | |
2629 | ||
0826f1d8 JL |
2630 | /* Long term, this should probably move before the jump optimizer too, |
2631 | but I didn't want to disturb the rtl_dump_and_exit and related | |
2632 | stuff at this time. */ | |
2633 | if (optimize > 0 && flag_ssa) | |
2634 | { | |
2635 | /* Convert to SSA form. */ | |
2636 | ||
2637 | timevar_push (TV_TO_SSA); | |
2638 | open_dump_file (DFI_ssa, decl); | |
2639 | ||
2640 | find_basic_blocks (insns, max_reg_num (), rtl_dump_file); | |
0068fd96 | 2641 | cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP); |
0826f1d8 JL |
2642 | convert_to_ssa (); |
2643 | ||
2644 | close_dump_file (DFI_ssa, print_rtl_with_bb, insns); | |
2645 | timevar_pop (TV_TO_SSA); | |
2646 | ||
0b47e4c1 JL |
2647 | /* Perform sparse conditional constant propagation, if requested. */ |
2648 | if (flag_ssa_ccp) | |
2649 | { | |
2650 | timevar_push (TV_SSA_CCP); | |
2651 | open_dump_file (DFI_ssa_ccp, decl); | |
2652 | ||
2653 | ssa_const_prop (); | |
2654 | ||
2655 | close_dump_file (DFI_ssa_ccp, print_rtl_with_bb, get_insns ()); | |
2656 | timevar_pop (TV_SSA_CCP); | |
2657 | } | |
2658 | ||
2659 | /* It would be useful to cleanup the CFG at this point, but block | |
2660 | merging and possibly other transformations might leave a PHI | |
2661 | node in the middle of a basic block, which is a strict no-no. */ | |
2662 | ||
0826f1d8 JL |
2663 | /* The SSA implementation uses basic block numbers in its phi |
2664 | nodes. Thus, changing the control-flow graph or the basic | |
2665 | blocks, e.g., calling find_basic_blocks () or cleanup_cfg (), | |
2666 | may cause problems. */ | |
2667 | ||
2668 | if (flag_ssa_dce) | |
2669 | { | |
2d76cb1a | 2670 | /* Remove dead code. */ |
0826f1d8 JL |
2671 | |
2672 | timevar_push (TV_SSA_DCE); | |
2673 | open_dump_file (DFI_ssa_dce, decl); | |
2674 | ||
2675 | insns = get_insns (); | |
2676 | ssa_eliminate_dead_code(); | |
2677 | ||
2678 | close_dump_file (DFI_ssa_dce, print_rtl_with_bb, insns); | |
2679 | timevar_pop (TV_SSA_DCE); | |
2680 | } | |
2681 | ||
2682 | /* Convert from SSA form. */ | |
2683 | ||
2684 | timevar_push (TV_FROM_SSA); | |
2685 | open_dump_file (DFI_ussa, decl); | |
2686 | ||
2687 | convert_from_ssa (); | |
2688 | /* New registers have been created. Rescan their usage. */ | |
2689 | reg_scan (insns, max_reg_num (), 1); | |
0826f1d8 JL |
2690 | |
2691 | close_dump_file (DFI_ussa, print_rtl_with_bb, insns); | |
2692 | timevar_pop (TV_FROM_SSA); | |
2693 | ||
2694 | ggc_collect (); | |
f5143c46 | 2695 | /* CFG is no longer maintained up-to-date. */ |
3c030e88 | 2696 | free_bb_for_insn (); |
0826f1d8 JL |
2697 | } |
2698 | ||
2a9a326b | 2699 | timevar_push (TV_JUMP); |
9ec6d7ab RH |
2700 | |
2701 | if (optimize > 0) | |
2a9a326b AS |
2702 | { |
2703 | find_basic_blocks (insns, max_reg_num (), rtl_dump_file); | |
8ecba28a JH |
2704 | cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP |
2705 | | (flag_thread_jumps ? CLEANUP_THREADING : 0)); | |
9ec6d7ab RH |
2706 | |
2707 | /* ??? Run if-conversion before delete_null_pointer_checks, | |
2708 | since the later does not preserve the CFG. This should | |
2709 | be changed -- no since converting if's that are going to | |
2710 | be deleted. */ | |
2711 | timevar_push (TV_IFCVT); | |
2712 | if_convert (0); | |
2713 | timevar_pop (TV_IFCVT); | |
2714 | ||
f5143c46 | 2715 | /* CFG is no longer maintained up-to-date. */ |
3c030e88 | 2716 | free_bb_for_insn (); |
9ec6d7ab RH |
2717 | /* Try to identify useless null pointer tests and delete them. */ |
2718 | if (flag_delete_null_pointer_checks) | |
2719 | delete_null_pointer_checks (insns); | |
2a9a326b AS |
2720 | } |
2721 | ||
2722 | /* Jump optimization, and the removal of NULL pointer checks, may | |
2723 | have reduced the number of instructions substantially. CSE, and | |
2724 | future passes, allocate arrays whose dimensions involve the | |
2725 | maximum instruction UID, so if we can reduce the maximum UID | |
2726 | we'll save big on memory. */ | |
2727 | renumber_insns (rtl_dump_file); | |
2728 | timevar_pop (TV_JUMP); | |
a18820c6 RH |
2729 | |
2730 | close_dump_file (DFI_jump, print_rtl, insns); | |
dfdb644f | 2731 | |
1f8f4a0b | 2732 | ggc_collect (); |
a3770a81 | 2733 | |
4291d9c8 RS |
2734 | /* Perform common subexpression elimination. |
2735 | Nonzero value from `cse_main' means that jumps were simplified | |
2736 | and some code may now be unreachable, so do | |
2737 | jump optimization again. */ | |
2738 | ||
4291d9c8 RS |
2739 | if (optimize > 0) |
2740 | { | |
61098249 | 2741 | open_dump_file (DFI_cse, decl); |
2a9a326b | 2742 | timevar_push (TV_CSE); |
032713aa | 2743 | |
2a9a326b | 2744 | reg_scan (insns, max_reg_num (), 1); |
4291d9c8 | 2745 | |
2a9a326b | 2746 | tem = cse_main (insns, max_reg_num (), 0, rtl_dump_file); |
a18820c6 | 2747 | |
48aba75b RK |
2748 | /* If we are not running more CSE passes, then we are no longer |
2749 | expecting CSE to be run. But always rerun it in a cheap mode. */ | |
2750 | cse_not_expected = !flag_rerun_cse_after_loop && !flag_gcse; | |
c5c76735 | 2751 | |
534bfae4 | 2752 | if (tem || optimize > 1) |
2a9a326b AS |
2753 | { |
2754 | timevar_push (TV_JUMP); | |
0045d504 JH |
2755 | rebuild_jump_labels (insns); |
2756 | find_basic_blocks (insns, max_reg_num (), rtl_dump_file); | |
0068fd96 | 2757 | cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP); |
2a9a326b | 2758 | timevar_pop (TV_JUMP); |
f5143c46 | 2759 | /* CFG is no longer maintained up-to-date. */ |
3c030e88 | 2760 | free_bb_for_insn (); |
2a9a326b | 2761 | } |
854a97f0 | 2762 | |
e48a7fbe JL |
2763 | /* Run this after jump optmizations remove all the unreachable code |
2764 | so that unreachable code will not keep values live. */ | |
4793dca1 | 2765 | delete_trivially_dead_insns (insns, max_reg_num (), 0); |
e48a7fbe | 2766 | |
dfdb644f | 2767 | /* Try to identify useless null pointer tests and delete them. */ |
8ecba28a | 2768 | if (flag_delete_null_pointer_checks || flag_thread_jumps) |
2a9a326b AS |
2769 | { |
2770 | timevar_push (TV_JUMP); | |
2771 | find_basic_blocks (insns, max_reg_num (), rtl_dump_file); | |
2772 | ||
8ecba28a JH |
2773 | cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP |
2774 | | (flag_thread_jumps ? CLEANUP_THREADING : 0)); | |
2a9a326b | 2775 | |
8ecba28a JH |
2776 | if (flag_delete_null_pointer_checks) |
2777 | delete_null_pointer_checks (insns); | |
f5143c46 | 2778 | /* CFG is no longer maintained up-to-date. */ |
3c030e88 | 2779 | free_bb_for_insn (); |
2a9a326b AS |
2780 | timevar_pop (TV_JUMP); |
2781 | } | |
4291d9c8 | 2782 | |
673b5311 MM |
2783 | /* The second pass of jump optimization is likely to have |
2784 | removed a bunch more instructions. */ | |
2785 | renumber_insns (rtl_dump_file); | |
735a0e33 | 2786 | |
2a9a326b | 2787 | timevar_pop (TV_CSE); |
61098249 | 2788 | close_dump_file (DFI_cse, print_rtl, insns); |
032713aa | 2789 | } |
4291d9c8 | 2790 | |
61098249 RH |
2791 | open_dump_file (DFI_addressof, decl); |
2792 | ||
e9a25f70 JL |
2793 | purge_addressof (insns); |
2794 | reg_scan (insns, max_reg_num (), 1); | |
2795 | ||
61098249 | 2796 | close_dump_file (DFI_addressof, print_rtl, insns); |
735a0e33 | 2797 | |
1f8f4a0b | 2798 | ggc_collect (); |
a3770a81 | 2799 | |
7506f491 DE |
2800 | /* Perform global cse. */ |
2801 | ||
2802 | if (optimize > 0 && flag_gcse) | |
2803 | { | |
791f5e8d | 2804 | int save_csb, save_cfj; |
48aba75b RK |
2805 | int tem2 = 0; |
2806 | ||
2a9a326b | 2807 | timevar_push (TV_GCSE); |
61098249 | 2808 | open_dump_file (DFI_gcse, decl); |
735a0e33 | 2809 | |
854a97f0 | 2810 | find_basic_blocks (insns, max_reg_num (), rtl_dump_file); |
0068fd96 | 2811 | cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP); |
2a9a326b | 2812 | tem = gcse_main (insns, rtl_dump_file); |
b90e45ae | 2813 | rebuild_jump_labels (insns); |
e78d9500 | 2814 | |
791f5e8d BS |
2815 | save_csb = flag_cse_skip_blocks; |
2816 | save_cfj = flag_cse_follow_jumps; | |
2817 | flag_cse_skip_blocks = flag_cse_follow_jumps = 0; | |
2818 | ||
f5143c46 | 2819 | /* CFG is no longer maintained up-to-date. */ |
3c030e88 | 2820 | free_bb_for_insn (); |
48aba75b RK |
2821 | /* If -fexpensive-optimizations, re-run CSE to clean up things done |
2822 | by gcse. */ | |
2823 | if (flag_expensive_optimizations) | |
2824 | { | |
2825 | timevar_push (TV_CSE); | |
2826 | reg_scan (insns, max_reg_num (), 1); | |
2827 | tem2 = cse_main (insns, max_reg_num (), 0, rtl_dump_file); | |
2828 | timevar_pop (TV_CSE); | |
2829 | cse_not_expected = !flag_rerun_cse_after_loop; | |
2830 | } | |
5262d6b6 | 2831 | |
48aba75b RK |
2832 | /* If gcse or cse altered any jumps, rerun jump optimizations to clean |
2833 | things up. Then possibly re-run CSE again. */ | |
2834 | while (tem || tem2) | |
e78d9500 | 2835 | { |
48aba75b | 2836 | tem = tem2 = 0; |
2a9a326b | 2837 | timevar_push (TV_JUMP); |
0045d504 | 2838 | rebuild_jump_labels (insns); |
ca9fef16 JH |
2839 | delete_trivially_dead_insns (insns, max_reg_num (), 0); |
2840 | find_basic_blocks (insns, max_reg_num (), rtl_dump_file); | |
0068fd96 | 2841 | cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP); |
f5143c46 | 2842 | /* CFG is no longer maintained up-to-date. */ |
3c030e88 | 2843 | free_bb_for_insn (); |
2a9a326b | 2844 | timevar_pop (TV_JUMP); |
48aba75b RK |
2845 | |
2846 | if (flag_expensive_optimizations) | |
2847 | { | |
2848 | timevar_push (TV_CSE); | |
2849 | reg_scan (insns, max_reg_num (), 1); | |
2850 | tem2 = cse_main (insns, max_reg_num (), 0, rtl_dump_file); | |
2851 | timevar_pop (TV_CSE); | |
2852 | } | |
854a97f0 | 2853 | } |
7506f491 | 2854 | |
61098249 | 2855 | close_dump_file (DFI_gcse, print_rtl, insns); |
2a9a326b | 2856 | timevar_pop (TV_GCSE); |
a3770a81 | 2857 | |
1f8f4a0b | 2858 | ggc_collect (); |
791f5e8d BS |
2859 | flag_cse_skip_blocks = save_csb; |
2860 | flag_cse_follow_jumps = save_cfj; | |
a01da83b | 2861 | } |
a18820c6 | 2862 | |
4291d9c8 RS |
2863 | /* Move constant computations out of loops. */ |
2864 | ||
2865 | if (optimize > 0) | |
2866 | { | |
2a9a326b | 2867 | timevar_push (TV_LOOP); |
61098249 | 2868 | open_dump_file (DFI_loop, decl); |
3c030e88 | 2869 | free_bb_for_insn (); |
854a97f0 | 2870 | |
2a9a326b AS |
2871 | if (flag_rerun_loop_opt) |
2872 | { | |
01f62f01 JH |
2873 | cleanup_barriers (); |
2874 | ||
2a9a326b | 2875 | /* We only want to perform unrolling once. */ |
854a97f0 | 2876 | |
1bf14ad7 | 2877 | loop_optimize (insns, rtl_dump_file, 0); |
a18820c6 | 2878 | |
2a9a326b AS |
2879 | /* The first call to loop_optimize makes some instructions |
2880 | trivially dead. We delete those instructions now in the | |
2881 | hope that doing so will make the heuristics in loop work | |
2882 | better and possibly speed up compilation. */ | |
4793dca1 | 2883 | delete_trivially_dead_insns (insns, max_reg_num (), 0); |
c6a26dc4 | 2884 | |
2a9a326b | 2885 | /* The regscan pass is currently necessary as the alias |
c6a26dc4 | 2886 | analysis code depends on this information. */ |
2a9a326b AS |
2887 | reg_scan (insns, max_reg_num (), 1); |
2888 | } | |
01f62f01 | 2889 | cleanup_barriers (); |
854a97f0 | 2890 | loop_optimize (insns, rtl_dump_file, |
0dd0e980 JH |
2891 | (flag_unroll_loops ? LOOP_UNROLL : 0) | LOOP_BCT |
2892 | | (flag_prefetch_loop_arrays ? LOOP_PREFETCH : 0)); | |
735a0e33 | 2893 | |
61098249 | 2894 | close_dump_file (DFI_loop, print_rtl, insns); |
2a9a326b | 2895 | timevar_pop (TV_LOOP); |
a3770a81 | 2896 | |
1f8f4a0b | 2897 | ggc_collect (); |
4291d9c8 RS |
2898 | } |
2899 | ||
032713aa | 2900 | if (optimize > 0) |
c2f006ec | 2901 | { |
2a9a326b | 2902 | timevar_push (TV_CSE2); |
61098249 | 2903 | open_dump_file (DFI_cse2, decl); |
735a0e33 | 2904 | |
032713aa NC |
2905 | if (flag_rerun_cse_after_loop) |
2906 | { | |
2907 | /* Running another jump optimization pass before the second | |
2908 | cse pass sometimes simplifies the RTL enough to allow | |
2909 | the second CSE pass to do a better job. Jump_optimize can change | |
2910 | max_reg_num so we must rerun reg_scan afterwards. | |
2911 | ??? Rework to not call reg_scan so often. */ | |
2a9a326b | 2912 | timevar_push (TV_JUMP); |
9ec6d7ab | 2913 | |
35bb0780 JW |
2914 | /* The previous call to loop_optimize makes some instructions |
2915 | trivially dead. We delete those instructions now in the | |
2916 | hope that doing so will make the heuristics in jump work | |
2917 | better and possibly speed up compilation. */ | |
4793dca1 | 2918 | delete_trivially_dead_insns (insns, max_reg_num (), 0); |
35bb0780 | 2919 | |
2a9a326b | 2920 | reg_scan (insns, max_reg_num (), 0); |
9ec6d7ab RH |
2921 | |
2922 | timevar_push (TV_IFCVT); | |
2923 | ||
2924 | find_basic_blocks (insns, max_reg_num (), rtl_dump_file); | |
46fac664 | 2925 | cleanup_cfg (CLEANUP_EXPENSIVE); |
9ec6d7ab RH |
2926 | if_convert (0); |
2927 | ||
2928 | timevar_pop(TV_IFCVT); | |
2929 | ||
2a9a326b | 2930 | timevar_pop (TV_JUMP); |
854a97f0 | 2931 | |
f5143c46 | 2932 | /* CFG is no longer maintained up-to-date. */ |
3c030e88 | 2933 | free_bb_for_insn (); |
2a9a326b AS |
2934 | reg_scan (insns, max_reg_num (), 0); |
2935 | tem = cse_main (insns, max_reg_num (), 1, rtl_dump_file); | |
a18820c6 | 2936 | |
032713aa | 2937 | if (tem) |
2a9a326b AS |
2938 | { |
2939 | timevar_push (TV_JUMP); | |
0045d504 JH |
2940 | rebuild_jump_labels (insns); |
2941 | find_basic_blocks (insns, max_reg_num (), rtl_dump_file); | |
2942 | cleanup_cfg (CLEANUP_EXPENSIVE); | |
f5143c46 | 2943 | /* CFG is no longer maintained up-to-date. */ |
3c030e88 | 2944 | free_bb_for_insn (); |
2a9a326b AS |
2945 | timevar_pop (TV_JUMP); |
2946 | } | |
032713aa | 2947 | } |
0d332add | 2948 | |
61098249 | 2949 | close_dump_file (DFI_cse2, print_rtl, insns); |
2a9a326b | 2950 | timevar_pop (TV_CSE2); |
a3770a81 | 2951 | |
1f8f4a0b | 2952 | ggc_collect (); |
032713aa | 2953 | } |
735a0e33 | 2954 | |
9ec6d7ab RH |
2955 | cse_not_expected = 1; |
2956 | ||
4291d9c8 RS |
2957 | regclass_init (); |
2958 | ||
d29c259b RH |
2959 | /* Do control and data flow analysis; wrote some of the results to |
2960 | the dump file. */ | |
4291d9c8 | 2961 | |
2a9a326b | 2962 | timevar_push (TV_FLOW); |
51891abe JH |
2963 | open_dump_file (DFI_cfg, decl); |
2964 | ||
2a9a326b | 2965 | find_basic_blocks (insns, max_reg_num (), rtl_dump_file); |
c4cc12b7 | 2966 | cleanup_cfg ((optimize ? CLEANUP_EXPENSIVE : 0) |
8ecba28a | 2967 | | (flag_thread_jumps ? CLEANUP_THREADING : 0)); |
b313a0fe | 2968 | check_function_return_warnings (); |
51891abe | 2969 | |
097c2d51 JH |
2970 | /* It may make more sense to mark constant functions after dead code is |
2971 | eliminated by life_analyzis, but we need to do it early, as -fprofile-arcs | |
2972 | may insert code making function non-constant, but we still must consider | |
2973 | it as constant, otherwise -fbranch-probabilities will not read data back. | |
2974 | ||
2975 | life_analyzis rarely eliminates modification of external memory. | |
2976 | */ | |
2977 | mark_constant_function (); | |
2978 | ||
51891abe | 2979 | close_dump_file (DFI_cfg, print_rtl_with_bb, insns); |
854a97f0 | 2980 | |
51891abe JH |
2981 | if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities) |
2982 | { | |
2983 | timevar_push (TV_BRANCH_PROB); | |
2984 | open_dump_file (DFI_bp, decl); | |
2985 | ||
2986 | branch_prob (); | |
2987 | ||
2988 | close_dump_file (DFI_bp, print_rtl_with_bb, insns); | |
2989 | timevar_pop (TV_BRANCH_PROB); | |
2990 | } | |
2991 | ||
2992 | open_dump_file (DFI_life, decl); | |
2a9a326b AS |
2993 | if (optimize) |
2994 | { | |
2995 | struct loops loops; | |
604617ba | 2996 | |
2a9a326b AS |
2997 | /* Discover and record the loop depth at the head of each basic |
2998 | block. The loop infrastructure does the real job for us. */ | |
5d6a16e2 | 2999 | flow_loops_find (&loops, LOOP_TREE); |
604617ba | 3000 | |
2a9a326b | 3001 | /* Estimate using heuristics if no profiling info is available. */ |
3ff51205 AH |
3002 | if (flag_guess_branch_prob) |
3003 | estimate_probability (&loops); | |
604617ba | 3004 | |
2a9a326b | 3005 | if (rtl_dump_file) |
6057c0e6 | 3006 | flow_loops_dump (&loops, rtl_dump_file, NULL, 0); |
604617ba | 3007 | |
2a9a326b AS |
3008 | flow_loops_free (&loops); |
3009 | } | |
3010 | life_analysis (insns, rtl_dump_file, PROP_FINAL); | |
2a9a326b | 3011 | timevar_pop (TV_FLOW); |
5ece9746 | 3012 | |
7b40bc6b RH |
3013 | no_new_pseudos = 1; |
3014 | ||
d29c259b RH |
3015 | if (warn_uninitialized || extra_warnings) |
3016 | { | |
3017 | uninitialized_vars_warning (DECL_INITIAL (decl)); | |
3018 | if (extra_warnings) | |
3019 | setjmp_args_warning (); | |
4291d9c8 RS |
3020 | } |
3021 | ||
0626ef8a AM |
3022 | if (optimize) |
3023 | { | |
3024 | if (initialize_uninitialized_subregs ()) | |
3025 | { | |
3026 | /* Insns were inserted, so things might look a bit different. */ | |
a01da83b | 3027 | insns = get_insns (); |
0626ef8a AM |
3028 | life_analysis (insns, rtl_dump_file, |
3029 | (PROP_LOG_LINKS | PROP_REG_INFO | PROP_DEATH_NOTES)); | |
3030 | } | |
3031 | } | |
3032 | ||
51891abe | 3033 | close_dump_file (DFI_life, print_rtl_with_bb, insns); |
735a0e33 | 3034 | |
1f8f4a0b | 3035 | ggc_collect (); |
a3770a81 | 3036 | |
4291d9c8 RS |
3037 | /* If -opt, try combining insns through substitution. */ |
3038 | ||
3039 | if (optimize > 0) | |
032713aa | 3040 | { |
44a76fc8 AG |
3041 | int rebuild_jump_labels_after_combine = 0; |
3042 | ||
2a9a326b | 3043 | timevar_push (TV_COMBINE); |
61098249 RH |
3044 | open_dump_file (DFI_combine, decl); |
3045 | ||
2a9a326b AS |
3046 | rebuild_jump_labels_after_combine |
3047 | = combine_instructions (insns, max_reg_num ()); | |
854a97f0 | 3048 | |
39f95a2c JH |
3049 | /* Always purge dead edges, as we may eliminate an insn throwing |
3050 | exception. */ | |
473fb060 | 3051 | rebuild_jump_labels_after_combine |= purge_all_dead_edges (true); |
39f95a2c | 3052 | |
44a76fc8 AG |
3053 | /* Combining insns may have turned an indirect jump into a |
3054 | direct jump. Rebuid the JUMP_LABEL fields of jumping | |
3055 | instructions. */ | |
3056 | if (rebuild_jump_labels_after_combine) | |
3057 | { | |
2a9a326b AS |
3058 | timevar_push (TV_JUMP); |
3059 | rebuild_jump_labels (insns); | |
3060 | timevar_pop (TV_JUMP); | |
9ec6d7ab | 3061 | |
635559ab | 3062 | cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_UPDATE_LIFE); |
44a76fc8 | 3063 | } |
735a0e33 | 3064 | |
61098249 | 3065 | close_dump_file (DFI_combine, print_rtl_with_bb, insns); |
2a9a326b | 3066 | timevar_pop (TV_COMBINE); |
a3770a81 | 3067 | |
1f8f4a0b | 3068 | ggc_collect (); |
032713aa | 3069 | } |
8c660648 | 3070 | |
9ec6d7ab RH |
3071 | /* Rerun if-conversion, as combine may have simplified things enough to |
3072 | now meet sequence length restrictions. */ | |
3073 | if (optimize > 0) | |
3074 | { | |
3075 | timevar_push (TV_IFCVT); | |
3076 | open_dump_file (DFI_ce, decl); | |
3077 | ||
7b40bc6b | 3078 | no_new_pseudos = 0; |
9ec6d7ab | 3079 | if_convert (1); |
7b40bc6b | 3080 | no_new_pseudos = 1; |
9ec6d7ab RH |
3081 | |
3082 | close_dump_file (DFI_ce, print_rtl_with_bb, insns); | |
3083 | timevar_pop (TV_IFCVT); | |
3084 | } | |
3085 | ||
8c660648 JL |
3086 | /* Register allocation pre-pass, to reduce number of moves |
3087 | necessary for two-address machines. */ | |
1230327b | 3088 | if (optimize > 0 && (flag_regmove || flag_expensive_optimizations)) |
032713aa | 3089 | { |
2a9a326b | 3090 | timevar_push (TV_REGMOVE); |
61098249 | 3091 | open_dump_file (DFI_regmove, decl); |
735a0e33 | 3092 | |
2a9a326b | 3093 | regmove_optimize (insns, max_reg_num (), rtl_dump_file); |
735a0e33 | 3094 | |
61098249 | 3095 | close_dump_file (DFI_regmove, print_rtl_with_bb, insns); |
2a9a326b | 3096 | timevar_pop (TV_REGMOVE); |
a3770a81 | 3097 | |
1f8f4a0b | 3098 | ggc_collect (); |
032713aa | 3099 | } |
8c660648 | 3100 | |
22fb740d JH |
3101 | /* Do unconditional splitting before register allocation to allow machine |
3102 | description to add extra information not needed previously. */ | |
3103 | split_all_insns (1); | |
3104 | ||
7b40bc6b RH |
3105 | /* Any of the several passes since flow1 will have munged register |
3106 | lifetime data a bit. */ | |
22fb740d | 3107 | register_life_up_to_date = 0; |
7b40bc6b | 3108 | |
97d36f45 | 3109 | #ifdef OPTIMIZE_MODE_SWITCHING |
b932f770 | 3110 | timevar_push (TV_MODE_SWITCH); |
97d36f45 | 3111 | |
22fb740d | 3112 | no_new_pseudos = 0; |
9714cf43 | 3113 | if (optimize_mode_switching (NULL)) |
bd675859 BS |
3114 | { |
3115 | /* We did work, and so had to regenerate global life information. | |
3116 | Take advantage of this and don't re-recompute register life | |
3117 | information below. */ | |
3118 | register_life_up_to_date = 1; | |
9f09b1f2 | 3119 | } |
22fb740d | 3120 | no_new_pseudos = 1; |
bd675859 | 3121 | |
b932f770 | 3122 | timevar_pop (TV_MODE_SWITCH); |
97d36f45 | 3123 | #endif |
9f09b1f2 | 3124 | |
05b432db JH |
3125 | timevar_push (TV_SCHED); |
3126 | ||
375e2d5c | 3127 | #ifdef INSN_SCHEDULING |
97726216 RK |
3128 | |
3129 | /* Print function header into sched dump now | |
3130 | because doing the sched analysis makes some of the dump. */ | |
4291d9c8 RS |
3131 | if (optimize > 0 && flag_schedule_insns) |
3132 | { | |
61098249 | 3133 | open_dump_file (DFI_sched, decl); |
735a0e33 | 3134 | |
4291d9c8 RS |
3135 | /* Do control and data sched analysis, |
3136 | and write some of the results to dump file. */ | |
3137 | ||
2a9a326b | 3138 | schedule_insns (rtl_dump_file); |
735a0e33 | 3139 | |
61098249 | 3140 | close_dump_file (DFI_sched, print_rtl_with_bb, insns); |
9ec6d7ab | 3141 | |
7b40bc6b RH |
3142 | /* Register lifetime information was updated as part of verifying |
3143 | the schedule. */ | |
3144 | register_life_up_to_date = 1; | |
4291d9c8 | 3145 | } |
375e2d5c | 3146 | #endif |
05b432db JH |
3147 | timevar_pop (TV_SCHED); |
3148 | ||
3149 | ggc_collect (); | |
4291d9c8 | 3150 | |
54ff41b7 JW |
3151 | /* Determine if the current function is a leaf before running reload |
3152 | since this can impact optimizations done by the prologue and | |
3153 | epilogue thus changing register elimination offsets. */ | |
3154 | current_function_is_leaf = leaf_function_p (); | |
3155 | ||
2a9a326b | 3156 | timevar_push (TV_LOCAL_ALLOC); |
61098249 | 3157 | open_dump_file (DFI_lreg, decl); |
246fd41f | 3158 | |
854a97f0 | 3159 | /* Allocate pseudo-regs that are used only within 1 basic block. |
3f1b9b1b JL |
3160 | |
3161 | RUN_JUMP_AFTER_RELOAD records whether or not we need to rerun the | |
3162 | jump optimizer after register allocation and reloading are finished. */ | |
4291d9c8 | 3163 | |
7b40bc6b RH |
3164 | if (! register_life_up_to_date) |
3165 | recompute_reg_usage (insns, ! optimize_size); | |
385b6e2d R |
3166 | |
3167 | /* Allocate the reg_renumber array. */ | |
3168 | allocate_reg_info (max_regno, FALSE, TRUE); | |
3169 | ||
3170 | /* And the reg_equiv_memory_loc array. */ | |
3171 | reg_equiv_memory_loc = (rtx *) xcalloc (max_regno, sizeof (rtx)); | |
3172 | ||
3173 | allocate_initial_values (reg_equiv_memory_loc); | |
3174 | ||
2a9a326b AS |
3175 | regclass (insns, max_reg_num (), rtl_dump_file); |
3176 | rebuild_label_notes_after_reload = local_alloc (); | |
3177 | ||
3178 | timevar_pop (TV_LOCAL_ALLOC); | |
4291d9c8 | 3179 | |
61098249 | 3180 | if (dump_file[DFI_lreg].enabled) |
032713aa | 3181 | { |
2a9a326b AS |
3182 | timevar_push (TV_DUMP); |
3183 | ||
3184 | dump_flow_info (rtl_dump_file); | |
3185 | dump_local_alloc (rtl_dump_file); | |
735a0e33 | 3186 | |
61098249 | 3187 | close_dump_file (DFI_lreg, print_rtl_with_bb, insns); |
2a9a326b | 3188 | timevar_pop (TV_DUMP); |
032713aa | 3189 | } |
4291d9c8 | 3190 | |
1f8f4a0b | 3191 | ggc_collect (); |
a3770a81 | 3192 | |
2a9a326b | 3193 | timevar_push (TV_GLOBAL_ALLOC); |
61098249 | 3194 | open_dump_file (DFI_greg, decl); |
4291d9c8 | 3195 | |
d29c259b RH |
3196 | /* If optimizing, allocate remaining pseudo-regs. Do the reload |
3197 | pass fixing up any insns that are invalid. */ | |
4291d9c8 | 3198 | |
2a9a326b AS |
3199 | if (optimize) |
3200 | failure = global_alloc (rtl_dump_file); | |
3201 | else | |
3202 | { | |
3203 | build_insn_chain (insns); | |
e04ca094 | 3204 | failure = reload (insns, 0); |
2a9a326b AS |
3205 | } |
3206 | ||
3207 | timevar_pop (TV_GLOBAL_ALLOC); | |
4291d9c8 | 3208 | |
8bb16620 BS |
3209 | if (dump_file[DFI_greg].enabled) |
3210 | { | |
3211 | timevar_push (TV_DUMP); | |
3212 | ||
3213 | dump_global_regs (rtl_dump_file); | |
3214 | ||
3215 | close_dump_file (DFI_greg, print_rtl_with_bb, insns); | |
3216 | timevar_pop (TV_DUMP); | |
3217 | } | |
3218 | ||
ab40ad2b RS |
3219 | if (failure) |
3220 | goto exit_rest_of_compilation; | |
3221 | ||
1f8f4a0b | 3222 | ggc_collect (); |
a3770a81 | 3223 | |
8bb16620 BS |
3224 | open_dump_file (DFI_postreload, decl); |
3225 | ||
c8ed219d RK |
3226 | /* Do a very simple CSE pass over just the hard registers. */ |
3227 | if (optimize > 0) | |
2a9a326b AS |
3228 | { |
3229 | timevar_push (TV_RELOAD_CSE_REGS); | |
3230 | reload_cse_regs (insns); | |
854a97f0 | 3231 | timevar_pop (TV_RELOAD_CSE_REGS); |
2a9a326b | 3232 | } |
c8ed219d | 3233 | |
0edaaa41 HB |
3234 | /* Register allocation and reloading may have turned an indirect jump into |
3235 | a direct jump. If so, we must rebuild the JUMP_LABEL fields of | |
3236 | jumping instructions. */ | |
3237 | if (rebuild_label_notes_after_reload) | |
2a9a326b AS |
3238 | { |
3239 | timevar_push (TV_JUMP); | |
3240 | ||
3241 | rebuild_jump_labels (insns); | |
3242 | ||
3243 | timevar_pop (TV_JUMP); | |
3244 | } | |
0edaaa41 | 3245 | |
8bb16620 | 3246 | close_dump_file (DFI_postreload, print_rtl_with_bb, insns); |
e881bb1b | 3247 | |
6764d250 | 3248 | /* Re-create the death notes which were deleted during reload. */ |
2a9a326b | 3249 | timevar_push (TV_FLOW2); |
61098249 | 3250 | open_dump_file (DFI_flow2, decl); |
2a9a326b | 3251 | |
6f862f2f JH |
3252 | #ifdef ENABLE_CHECKING |
3253 | verify_flow_info (); | |
3254 | #endif | |
0005550b JH |
3255 | |
3256 | /* If optimizing, then go ahead and split insns now. */ | |
3257 | if (optimize > 0) | |
3258 | split_all_insns (0); | |
3259 | ||
0ecf09f9 | 3260 | cleanup_cfg (optimize ? CLEANUP_EXPENSIVE : 0); |
19d3c25c RH |
3261 | |
3262 | /* On some machines, the prologue and epilogue code, or parts thereof, | |
3263 | can be represented as RTL. Doing so lets us schedule insns between | |
3264 | it and the rest of the code and also allows delayed branch | |
3265 | scheduling to operate in the epilogue. */ | |
3266 | thread_prologue_and_epilogue_insns (insns); | |
3267 | ||
6764d250 | 3268 | if (optimize) |
e881bb1b | 3269 | { |
46fac664 | 3270 | cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_CROSSJUMP); |
2a9a326b | 3271 | life_analysis (insns, rtl_dump_file, PROP_FINAL); |
1e7f0a48 | 3272 | |
5fa41e13 | 3273 | /* This is kind of a heuristic. We need to run combine_stack_adjustments |
f73ad30e JH |
3274 | even for machines with possibly nonzero RETURN_POPS_ARGS |
3275 | and ACCUMULATE_OUTGOING_ARGS. We expect that only ports having | |
3276 | push instructions will have popping returns. */ | |
3277 | #ifndef PUSH_ROUNDING | |
3278 | if (!ACCUMULATE_OUTGOING_ARGS) | |
1e7f0a48 | 3279 | #endif |
2a9a326b | 3280 | combine_stack_adjustments (); |
1e7f0a48 | 3281 | |
1f8f4a0b | 3282 | ggc_collect (); |
e881bb1b | 3283 | } |
6764d250 | 3284 | |
56744d1a JL |
3285 | flow2_completed = 1; |
3286 | ||
61098249 | 3287 | close_dump_file (DFI_flow2, print_rtl_with_bb, insns); |
2a9a326b | 3288 | timevar_pop (TV_FLOW2); |
e881bb1b | 3289 | |
ede7cd44 RH |
3290 | #ifdef HAVE_peephole2 |
3291 | if (optimize > 0 && flag_peephole2) | |
3292 | { | |
2a9a326b | 3293 | timevar_push (TV_PEEPHOLE2); |
2a9a326b | 3294 | open_dump_file (DFI_peephole2, decl); |
9ec6d7ab | 3295 | |
2a9a326b | 3296 | peephole2_optimize (rtl_dump_file); |
ede7cd44 | 3297 | |
61098249 | 3298 | close_dump_file (DFI_peephole2, print_rtl_with_bb, insns); |
2a9a326b | 3299 | timevar_pop (TV_PEEPHOLE2); |
ede7cd44 RH |
3300 | } |
3301 | #endif | |
3302 | ||
8582c27b | 3303 | if (flag_rename_registers || flag_cprop_registers) |
5fa41e13 SC |
3304 | { |
3305 | timevar_push (TV_RENAME_REGISTERS); | |
3306 | open_dump_file (DFI_rnreg, decl); | |
3307 | ||
8582c27b RH |
3308 | if (flag_rename_registers) |
3309 | regrename_optimize (); | |
3310 | if (flag_cprop_registers) | |
3311 | copyprop_hardreg_forward (); | |
5fa41e13 SC |
3312 | |
3313 | close_dump_file (DFI_rnreg, print_rtl_with_bb, insns); | |
3314 | timevar_pop (TV_RENAME_REGISTERS); | |
854a97f0 | 3315 | } |
5fa41e13 | 3316 | |
2b2a8f1f RH |
3317 | if (optimize > 0) |
3318 | { | |
3319 | timevar_push (TV_IFCVT2); | |
3320 | open_dump_file (DFI_ce2, decl); | |
3321 | ||
3322 | if_convert (1); | |
3323 | ||
3324 | close_dump_file (DFI_ce2, print_rtl_with_bb, insns); | |
3325 | timevar_pop (TV_IFCVT2); | |
3326 | } | |
1e5fd094 JH |
3327 | #ifdef STACK_REGS |
3328 | if (optimize) | |
3329 | split_all_insns (1); | |
3330 | #endif | |
2b2a8f1f | 3331 | |
375e2d5c | 3332 | #ifdef INSN_SCHEDULING |
4291d9c8 RS |
3333 | if (optimize > 0 && flag_schedule_insns_after_reload) |
3334 | { | |
2a9a326b | 3335 | timevar_push (TV_SCHED2); |
61098249 | 3336 | open_dump_file (DFI_sched2, decl); |
4291d9c8 RS |
3337 | |
3338 | /* Do control and data sched analysis again, | |
3339 | and write some more of the results to dump file. */ | |
3340 | ||
05b432db JH |
3341 | split_all_insns (1); |
3342 | ||
2a9a326b | 3343 | schedule_insns (rtl_dump_file); |
4291d9c8 | 3344 | |
61098249 | 3345 | close_dump_file (DFI_sched2, print_rtl_with_bb, insns); |
2a9a326b | 3346 | timevar_pop (TV_SCHED2); |
a3770a81 | 3347 | |
1f8f4a0b | 3348 | ggc_collect (); |
4291d9c8 | 3349 | } |
375e2d5c | 3350 | #endif |
4291d9c8 RS |
3351 | |
3352 | #ifdef LEAF_REGISTERS | |
5ad9b85f JW |
3353 | current_function_uses_only_leaf_regs |
3354 | = optimize > 0 && only_leaf_regs_used () && leaf_function_p (); | |
4291d9c8 RS |
3355 | #endif |
3356 | ||
1e5fd094 JH |
3357 | #ifdef STACK_REGS |
3358 | timevar_push (TV_REG_STACK); | |
3359 | open_dump_file (DFI_stack, decl); | |
3360 | ||
3361 | reg_to_stack (insns, rtl_dump_file); | |
3362 | ||
3c030e88 | 3363 | close_dump_file (DFI_stack, print_rtl_with_bb, insns); |
1e5fd094 JH |
3364 | timevar_pop (TV_REG_STACK); |
3365 | ||
3366 | ggc_collect (); | |
3367 | #endif | |
4793dca1 | 3368 | if (optimize > 0) |
11bdd2ae | 3369 | { |
2a9a326b | 3370 | timevar_push (TV_REORDER_BLOCKS); |
61098249 | 3371 | open_dump_file (DFI_bbro, decl); |
11bdd2ae | 3372 | |
4793dca1 JH |
3373 | /* Last attempt to optimize CFG, as life analyzis possibly removed |
3374 | some instructions. */ | |
3375 | cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_POST_REGSTACK | |
3376 | | CLEANUP_CROSSJUMP); | |
3377 | if (flag_reorder_blocks) | |
3378 | { | |
3379 | reorder_basic_blocks (); | |
3380 | cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_POST_REGSTACK); | |
3381 | } | |
11bdd2ae | 3382 | |
61098249 | 3383 | close_dump_file (DFI_bbro, print_rtl_with_bb, insns); |
2a9a326b | 3384 | timevar_pop (TV_REORDER_BLOCKS); |
854a97f0 | 3385 | } |
247a370b | 3386 | compute_alignments (); |
11bdd2ae | 3387 | |
f5143c46 | 3388 | /* CFG is no longer maintained up-to-date. */ |
3c030e88 JH |
3389 | free_bb_for_insn (); |
3390 | ||
2c65021a RK |
3391 | /* If a machine dependent reorganization is needed, call it. */ |
3392 | #ifdef MACHINE_DEPENDENT_REORG | |
eced69b5 | 3393 | timevar_push (TV_MACH_DEP); |
61098249 | 3394 | open_dump_file (DFI_mach, decl); |
88924698 | 3395 | |
61098249 | 3396 | MACHINE_DEPENDENT_REORG (insns); |
032713aa | 3397 | |
232a132f | 3398 | close_dump_file (DFI_mach, print_rtl, insns); |
eced69b5 | 3399 | timevar_pop (TV_MACH_DEP); |
a3770a81 | 3400 | |
1f8f4a0b | 3401 | ggc_collect (); |
2c65021a RK |
3402 | #endif |
3403 | ||
0045d504 | 3404 | purge_line_number_notes (insns); |
01f62f01 | 3405 | cleanup_barriers (); |
0045d504 | 3406 | |
4291d9c8 | 3407 | /* If a scheduling pass for delayed branches is to be done, |
0f41302f | 3408 | call the scheduling code. */ |
4291d9c8 RS |
3409 | |
3410 | #ifdef DELAY_SLOTS | |
3411 | if (optimize > 0 && flag_delayed_branch) | |
3412 | { | |
2a9a326b | 3413 | timevar_push (TV_DBR_SCHED); |
61098249 | 3414 | open_dump_file (DFI_dbr, decl); |
bbd2180d | 3415 | |
2a9a326b | 3416 | dbr_schedule (insns, rtl_dump_file); |
735a0e33 | 3417 | |
232a132f | 3418 | close_dump_file (DFI_dbr, print_rtl, insns); |
2a9a326b | 3419 | timevar_pop (TV_DBR_SCHED); |
a3770a81 | 3420 | |
1f8f4a0b | 3421 | ggc_collect (); |
61098249 | 3422 | } |
4291d9c8 RS |
3423 | #endif |
3424 | ||
1e5fd094 | 3425 | #if defined (HAVE_ATTR_length) && !defined (STACK_REGS) |
d7e5d7fe | 3426 | timevar_push (TV_SHORTEN_BRANCH); |
6f862f2f | 3427 | split_all_insns_noflow (); |
2a9a326b | 3428 | timevar_pop (TV_SHORTEN_BRANCH); |
932f0847 | 3429 | #endif |
52a11cbf RH |
3430 | |
3431 | convert_to_eh_region_ranges (); | |
932f0847 JH |
3432 | |
3433 | /* Shorten branches. */ | |
3434 | timevar_push (TV_SHORTEN_BRANCH); | |
3435 | shorten_branches (get_insns ()); | |
3436 | timevar_pop (TV_SHORTEN_BRANCH); | |
4291d9c8 | 3437 | |
fb13d4d0 | 3438 | current_function_nothrow = nothrow_function_p (); |
12a22e76 JM |
3439 | if (current_function_nothrow) |
3440 | /* Now we know that this can't throw; set the flag for the benefit | |
3441 | of other functions later in this translation unit. */ | |
3442 | TREE_NOTHROW (current_function_decl) = 1; | |
fb13d4d0 | 3443 | |
4291d9c8 RS |
3444 | /* Now turn the rtl into assembler code. */ |
3445 | ||
2a9a326b AS |
3446 | timevar_push (TV_FINAL); |
3447 | { | |
3448 | rtx x; | |
3449 | const char *fnname; | |
4291d9c8 | 3450 | |
d171a5fb RK |
3451 | /* Get the function's name, as described by its RTL. This may be |
3452 | different from the DECL_NAME name used in the source file. */ | |
4291d9c8 | 3453 | |
2a9a326b AS |
3454 | x = DECL_RTL (decl); |
3455 | if (GET_CODE (x) != MEM) | |
3456 | abort (); | |
3457 | x = XEXP (x, 0); | |
3458 | if (GET_CODE (x) != SYMBOL_REF) | |
3459 | abort (); | |
3460 | fnname = XSTR (x, 0); | |
3461 | ||
3462 | assemble_start_function (decl, fnname); | |
3463 | final_start_function (insns, asm_out_file, optimize); | |
3464 | final (insns, asm_out_file, optimize, 0); | |
e2a12aca | 3465 | final_end_function (); |
2a1ee410 RH |
3466 | |
3467 | #ifdef IA64_UNWIND_INFO | |
3468 | /* ??? The IA-64 ".handlerdata" directive must be issued before | |
3469 | the ".endp" directive that closes the procedure descriptor. */ | |
3470 | output_function_exception_table (); | |
3471 | #endif | |
3472 | ||
2a9a326b | 3473 | assemble_end_function (decl, fnname); |
52a11cbf | 3474 | |
2a1ee410 RH |
3475 | #ifndef IA64_UNWIND_INFO |
3476 | /* Otherwise, it feels unclean to switch sections in the middle. */ | |
52a11cbf | 3477 | output_function_exception_table (); |
2a1ee410 | 3478 | #endif |
52a11cbf | 3479 | |
2a9a326b AS |
3480 | if (! quiet_flag) |
3481 | fflush (asm_out_file); | |
9ddca353 | 3482 | |
854a97f0 | 3483 | /* Release all memory allocated by flow. */ |
2a9a326b | 3484 | free_basic_block_vars (0); |
e881bb1b | 3485 | |
854a97f0 | 3486 | /* Release all memory held by regsets now. */ |
2a9a326b AS |
3487 | regset_release_memory (); |
3488 | } | |
3489 | timevar_pop (TV_FINAL); | |
4291d9c8 | 3490 | |
1f8f4a0b | 3491 | ggc_collect (); |
a3770a81 | 3492 | |
854a97f0 | 3493 | /* Write DBX symbols if requested. */ |
4291d9c8 RS |
3494 | |
3495 | /* Note that for those inline functions where we don't initially | |
3496 | know for certain that we will be generating an out-of-line copy, | |
3497 | the first invocation of this routine (rest_of_compilation) will | |
3498 | skip over this code by doing a `goto exit_rest_of_compilation;'. | |
3499 | Later on, finish_compilation will call rest_of_compilation again | |
3500 | for those inline functions that need to have out-of-line copies | |
3501 | generated. During that call, we *will* be routed past here. */ | |
3502 | ||
2a9a326b | 3503 | timevar_push (TV_SYMOUT); |
2b85879e | 3504 | (*debug_hooks->function_decl) (decl); |
2a9a326b | 3505 | timevar_pop (TV_SYMOUT); |
9a666dda | 3506 | |
4291d9c8 RS |
3507 | exit_rest_of_compilation: |
3508 | ||
f246a305 RS |
3509 | /* In case the function was not output, |
3510 | don't leave any temporary anonymous types | |
3511 | queued up for sdb output. */ | |
3512 | #ifdef SDB_DEBUGGING_INFO | |
3513 | if (write_symbols == SDB_DEBUG) | |
37366632 | 3514 | sdbout_types (NULL_TREE); |
f246a305 RS |
3515 | #endif |
3516 | ||
4291d9c8 | 3517 | reload_completed = 0; |
56744d1a | 3518 | flow2_completed = 0; |
f1db3576 | 3519 | no_new_pseudos = 0; |
4291d9c8 | 3520 | |
2a9a326b | 3521 | timevar_push (TV_FINAL); |
4291d9c8 | 3522 | |
2a9a326b AS |
3523 | /* Clear out the insn_length contents now that they are no |
3524 | longer valid. */ | |
3525 | init_insn_lengths (); | |
3526 | ||
3527 | /* Clear out the real_constant_chain before some of the rtx's | |
854a97f0 | 3528 | it runs through become garbage. */ |
2a9a326b AS |
3529 | clear_const_double_mem (); |
3530 | ||
2a9a326b AS |
3531 | /* Show no temporary slots allocated. */ |
3532 | init_temp_slots (); | |
adcd38c9 | 3533 | |
2a9a326b | 3534 | free_basic_block_vars (0); |
5652450c | 3535 | free_bb_for_insn (); |
fa51b01b | 3536 | |
2a9a326b | 3537 | timevar_pop (TV_FINAL); |
adcd38c9 | 3538 | |
c8d86b9a JW |
3539 | /* Make sure volatile mem refs aren't considered valid operands for |
3540 | arithmetic insns. We must call this here if this is a nested inline | |
3541 | function, since the above code leaves us in the init_recog state | |
3542 | (from final.c), and the function context push/pop code does not | |
3543 | save/restore volatile_ok. | |
3544 | ||
3545 | ??? Maybe it isn't necessary for expand_start_function to call this | |
3546 | anymore if we do it here? */ | |
3547 | ||
3548 | init_recog_no_volatile (); | |
3549 | ||
21cd906e | 3550 | /* We're done with this function. Free up memory if we can. */ |
01d939e8 | 3551 | free_after_parsing (cfun); |
fa51b01b | 3552 | if (! DECL_DEFER_OUTPUT (decl)) |
ae6f2a1c ZW |
3553 | { |
3554 | free_after_compilation (cfun); | |
3555 | ||
3556 | /* Clear integrate.c's pointer to the cfun structure we just | |
3557 | destroyed. */ | |
3558 | DECL_SAVED_INSNS (decl) = 0; | |
3559 | } | |
01d939e8 | 3560 | cfun = 0; |
a3770a81 | 3561 | |
1f8f4a0b | 3562 | ggc_collect (); |
a3770a81 | 3563 | |
2a9a326b | 3564 | timevar_pop (TV_REST_OF_COMPILATION); |
4291d9c8 RS |
3565 | } |
3566 | \f | |
b8468bc7 NC |
3567 | static void |
3568 | display_help () | |
3569 | { | |
854a97f0 KH |
3570 | int undoc; |
3571 | unsigned long i; | |
3572 | const char *lang; | |
3573 | ||
5e4adfba PT |
3574 | printf (_(" -ffixed-<register> Mark <register> as being unavailable to the compiler\n")); |
3575 | printf (_(" -fcall-used-<register> Mark <register> as being corrupted by function calls\n")); | |
3576 | printf (_(" -fcall-saved-<register> Mark <register> as being preserved across functions\n")); | |
3577 | printf (_(" -finline-limit=<number> Limits the size of inlined functions to <number>\n")); | |
3578 | printf (_(" -fmessage-length=<number> Limits diagnostics messages lengths to <number> characters per line. 0 suppresses line-wrapping\n")); | |
e6513023 | 3579 | printf (_(" -fdiagnostics-show-location=[once | every-line] Indicates how often source location information should be emitted, as prefix, at the beginning of diagnostics when line-wrapping\n")); |
b8468bc7 | 3580 | |
b6a1cbae | 3581 | for (i = ARRAY_SIZE (f_options); i--;) |
b8468bc7 | 3582 | { |
854a97f0 KH |
3583 | const char *description = f_options[i].description; |
3584 | ||
b8468bc7 NC |
3585 | if (description != NULL && * description != 0) |
3586 | printf (" -f%-21s %s\n", | |
a6371940 | 3587 | f_options[i].string, _(description)); |
b8468bc7 | 3588 | } |
854a97f0 | 3589 | |
1737c953 JM |
3590 | printf (_(" -O[number] Set optimization level to [number]\n")); |
3591 | printf (_(" -Os Optimize for space rather than speed\n")); | |
639bc36c | 3592 | for (i = LAST_PARAM; i--;) |
1c4c47db JO |
3593 | { |
3594 | const char *description = compiler_params[i].help; | |
3595 | const int length = 21-strlen(compiler_params[i].option); | |
3596 | ||
3597 | if (description != NULL && * description != 0) | |
3598 | printf (" --param %s=<value>%.*s%s\n", | |
3599 | compiler_params[i].option, | |
3600 | length > 0 ? length : 1, " ", | |
a6371940 | 3601 | _(description)); |
1c4c47db | 3602 | } |
89abf8d1 | 3603 | printf (_(" -pedantic Issue warnings needed by strict compliance to ISO C\n")); |
5e4adfba PT |
3604 | printf (_(" -pedantic-errors Like -pedantic except that errors are produced\n")); |
3605 | printf (_(" -w Suppress warnings\n")); | |
3606 | printf (_(" -W Enable extra warnings\n")); | |
854a97f0 | 3607 | |
b6a1cbae | 3608 | for (i = ARRAY_SIZE (W_options); i--;) |
b8468bc7 | 3609 | { |
854a97f0 KH |
3610 | const char *description = W_options[i].description; |
3611 | ||
b8468bc7 NC |
3612 | if (description != NULL && * description != 0) |
3613 | printf (" -W%-21s %s\n", | |
a6371940 | 3614 | W_options[i].string, _(description)); |
b8468bc7 | 3615 | } |
854a97f0 | 3616 | |
5e4adfba | 3617 | printf (_(" -Wunused Enable unused warnings\n")); |
5e4adfba PT |
3618 | printf (_(" -Wlarger-than-<number> Warn if an object is larger than <number> bytes\n")); |
3619 | printf (_(" -p Enable function profiling\n")); | |
b8468bc7 | 3620 | #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER) |
5e4adfba | 3621 | printf (_(" -a Enable block profiling \n")); |
854a97f0 | 3622 | #endif |
b8468bc7 | 3623 | #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER) || defined FUNCTION_BLOCK_PROFILER_EXIT |
5e4adfba | 3624 | printf (_(" -ax Enable jump profiling \n")); |
854a97f0 | 3625 | #endif |
5e4adfba PT |
3626 | printf (_(" -o <file> Place output into <file> \n")); |
3627 | printf (_("\ | |
3628 | -G <number> Put global and static data smaller than <number>\n\ | |
3629 | bytes into a special section (on some targets)\n")); | |
854a97f0 | 3630 | |
b6a1cbae | 3631 | for (i = ARRAY_SIZE (debug_args); i--;) |
b8468bc7 NC |
3632 | { |
3633 | if (debug_args[i].description != NULL) | |
854a97f0 | 3634 | printf (" -g%-21s %s\n", |
a6371940 | 3635 | debug_args[i].arg, _(debug_args[i].description)); |
b8468bc7 | 3636 | } |
854a97f0 | 3637 | |
c47af4b7 | 3638 | printf (_(" -aux-info <file> Emit declaration info into <file>\n")); |
5e4adfba PT |
3639 | printf (_(" -quiet Do not display functions compiled or elapsed time\n")); |
3640 | printf (_(" -version Display the compiler's version\n")); | |
3641 | printf (_(" -d[letters] Enable dumps from specific passes of the compiler\n")); | |
3642 | printf (_(" -dumpbase <file> Base name to be used for dumps from specific passes\n")); | |
7b5efe21 | 3643 | #if defined INSN_SCHEDULING |
5e4adfba | 3644 | printf (_(" -fsched-verbose=<number> Set the verbosity level of the scheduler\n")); |
b8468bc7 | 3645 | #endif |
5e4adfba | 3646 | printf (_(" --help Display this information\n")); |
b8468bc7 NC |
3647 | |
3648 | undoc = 0; | |
3649 | lang = "language"; | |
854a97f0 | 3650 | |
b8468bc7 NC |
3651 | /* Display descriptions of language specific options. |
3652 | If there is no description, note that there is an undocumented option. | |
3653 | If the description is empty, do not display anything. (This allows | |
3654 | options to be deliberately undocumented, for whatever reason). | |
3655 | If the option string is missing, then this is a marker, indicating | |
630962bf | 3656 | that the description string is in fact the name of a language, whose |
b8468bc7 | 3657 | language specific options are to follow. */ |
854a97f0 | 3658 | |
b6a1cbae | 3659 | if (ARRAY_SIZE (documented_lang_options) > 1) |
b8468bc7 | 3660 | { |
5e4adfba | 3661 | printf (_("\nLanguage specific options:\n")); |
b8468bc7 | 3662 | |
b6a1cbae | 3663 | for (i = 0; i < ARRAY_SIZE (documented_lang_options); i++) |
b8468bc7 | 3664 | { |
854a97f0 KH |
3665 | const char *description = documented_lang_options[i].description; |
3666 | const char *option = documented_lang_options[i].option; | |
b8468bc7 NC |
3667 | |
3668 | if (description == NULL) | |
844642e6 NC |
3669 | { |
3670 | undoc = 1; | |
3671 | ||
3672 | if (extra_warnings) | |
5e4adfba | 3673 | printf (_(" %-23.23s [undocumented]\n"), option); |
844642e6 | 3674 | } |
854a97f0 | 3675 | else if (*description == 0) |
b8468bc7 NC |
3676 | continue; |
3677 | else if (option == NULL) | |
3678 | { | |
3679 | if (undoc) | |
3680 | printf | |
5e4adfba | 3681 | (_("\nThere are undocumented %s specific options as well.\n"), |
b8468bc7 NC |
3682 | lang); |
3683 | undoc = 0; | |
854a97f0 | 3684 | |
5e4adfba | 3685 | printf (_("\n Options for %s:\n"), description); |
b8468bc7 NC |
3686 | |
3687 | lang = description; | |
3688 | } | |
3689 | else | |
a6371940 | 3690 | printf (" %-23.23s %s\n", option, _(description)); |
b8468bc7 NC |
3691 | } |
3692 | } | |
3693 | ||
3694 | if (undoc) | |
854a97f0 KH |
3695 | printf (_("\nThere are undocumented %s specific options as well.\n"), |
3696 | lang); | |
b8468bc7 | 3697 | |
10501d8f CC |
3698 | display_target_options (); |
3699 | } | |
3700 | ||
8f54374e | 3701 | static void |
10501d8f CC |
3702 | display_target_options () |
3703 | { | |
a01da83b | 3704 | int undoc, i; |
76306300 NB |
3705 | static bool displayed = false; |
3706 | ||
3707 | /* Avoid double printing for --help --target-help. */ | |
3708 | if (displayed) | |
3709 | return; | |
3710 | displayed = true; | |
10501d8f | 3711 | |
b6a1cbae | 3712 | if (ARRAY_SIZE (target_switches) > 1 |
b8468bc7 | 3713 | #ifdef TARGET_OPTIONS |
b6a1cbae | 3714 | || ARRAY_SIZE (target_options) > 1 |
b8468bc7 NC |
3715 | #endif |
3716 | ) | |
3717 | { | |
3718 | int doc = 0; | |
854a97f0 | 3719 | |
b8468bc7 | 3720 | undoc = 0; |
854a97f0 | 3721 | |
5e4adfba | 3722 | printf (_("\nTarget specific options:\n")); |
b8468bc7 | 3723 | |
b6a1cbae | 3724 | for (i = ARRAY_SIZE (target_switches); i--;) |
b8468bc7 | 3725 | { |
854a97f0 KH |
3726 | const char *option = target_switches[i].name; |
3727 | const char *description = target_switches[i].description; | |
b8468bc7 | 3728 | |
854a97f0 | 3729 | if (option == NULL || *option == 0) |
b8468bc7 NC |
3730 | continue; |
3731 | else if (description == NULL) | |
844642e6 NC |
3732 | { |
3733 | undoc = 1; | |
854a97f0 | 3734 | |
844642e6 | 3735 | if (extra_warnings) |
10501d8f | 3736 | printf (_(" -m%-23.23s [undocumented]\n"), option); |
844642e6 | 3737 | } |
b8468bc7 | 3738 | else if (* description != 0) |
a6371940 | 3739 | doc += printf (" -m%-23.23s %s\n", option, _(description)); |
b8468bc7 | 3740 | } |
854a97f0 KH |
3741 | |
3742 | #ifdef TARGET_OPTIONS | |
b6a1cbae | 3743 | for (i = ARRAY_SIZE (target_options); i--;) |
b8468bc7 | 3744 | { |
854a97f0 KH |
3745 | const char *option = target_options[i].prefix; |
3746 | const char *description = target_options[i].description; | |
b8468bc7 | 3747 | |
854a97f0 | 3748 | if (option == NULL || *option == 0) |
b8468bc7 NC |
3749 | continue; |
3750 | else if (description == NULL) | |
844642e6 NC |
3751 | { |
3752 | undoc = 1; | |
854a97f0 | 3753 | |
844642e6 | 3754 | if (extra_warnings) |
10501d8f | 3755 | printf (_(" -m%-23.23s [undocumented]\n"), option); |
844642e6 | 3756 | } |
b8468bc7 | 3757 | else if (* description != 0) |
a6371940 | 3758 | doc += printf (" -m%-23.23s %s\n", option, _(description)); |
b8468bc7 NC |
3759 | } |
3760 | #endif | |
3761 | if (undoc) | |
ff59bfe6 JM |
3762 | { |
3763 | if (doc) | |
5e4adfba | 3764 | printf (_("\nThere are undocumented target specific options as well.\n")); |
ff59bfe6 | 3765 | else |
5e4adfba | 3766 | printf (_(" They exist, but they are not documented.\n")); |
ff59bfe6 | 3767 | } |
b8468bc7 NC |
3768 | } |
3769 | } | |
39dd8003 | 3770 | \f |
f63d1bf7 | 3771 | /* Parse a -d... command line switch. */ |
39dd8003 NC |
3772 | |
3773 | static void | |
3774 | decode_d_option (arg) | |
854a97f0 | 3775 | const char *arg; |
39dd8003 | 3776 | { |
61098249 RH |
3777 | int i, c, matched; |
3778 | ||
3779 | while (*arg) | |
3780 | switch (c = *arg++) | |
39dd8003 NC |
3781 | { |
3782 | case 'a': | |
dbbbbf3b | 3783 | for (i = 0; i < (int) DFI_MAX; ++i) |
61098249 | 3784 | dump_file[i].enabled = 1; |
39dd8003 NC |
3785 | break; |
3786 | case 'A': | |
3787 | flag_debug_asm = 1; | |
3788 | break; | |
39dd8003 NC |
3789 | case 'p': |
3790 | flag_print_asm_name = 1; | |
3791 | break; | |
c349e40b SC |
3792 | case 'P': |
3793 | flag_dump_rtl_in_asm = 1; | |
3794 | flag_print_asm_name = 1; | |
3795 | break; | |
39dd8003 NC |
3796 | case 'v': |
3797 | graph_dump_format = vcg; | |
3798 | break; | |
39dd8003 NC |
3799 | case 'x': |
3800 | rtl_dump_and_exit = 1; | |
3801 | break; | |
3802 | case 'y': | |
5d69f816 | 3803 | (*lang_hooks.set_yydebug) (1); |
39dd8003 | 3804 | break; |
39dd8003 NC |
3805 | case 'D': /* These are handled by the preprocessor. */ |
3806 | case 'I': | |
3807 | break; | |
61098249 | 3808 | |
39dd8003 | 3809 | default: |
61098249 | 3810 | matched = 0; |
dbbbbf3b | 3811 | for (i = 0; i < (int) DFI_MAX; ++i) |
61098249 RH |
3812 | if (c == dump_file[i].debug_switch) |
3813 | { | |
3814 | dump_file[i].enabled = 1; | |
3815 | matched = 1; | |
3816 | } | |
3817 | ||
3818 | if (! matched) | |
3819 | warning ("unrecognized gcc debugging option: %c", c); | |
39dd8003 NC |
3820 | break; |
3821 | } | |
3822 | } | |
b8468bc7 | 3823 | |
f63d1bf7 | 3824 | /* Parse a -f... command line switch. ARG is the value after the -f. |
39dd8003 NC |
3825 | It is safe to access 'ARG - 2' to generate the full switch name. |
3826 | Return the number of strings consumed. */ | |
b8468bc7 NC |
3827 | |
3828 | static int | |
39dd8003 | 3829 | decode_f_option (arg) |
854a97f0 | 3830 | const char *arg; |
b8468bc7 | 3831 | { |
39dd8003 | 3832 | int j; |
6f5ef761 | 3833 | const char *option_value = NULL; |
39dd8003 NC |
3834 | |
3835 | /* Search for the option in the table of binary f options. */ | |
b6a1cbae | 3836 | for (j = ARRAY_SIZE (f_options); j--;) |
39dd8003 NC |
3837 | { |
3838 | if (!strcmp (arg, f_options[j].string)) | |
3839 | { | |
3840 | *f_options[j].variable = f_options[j].on_value; | |
3841 | return 1; | |
3842 | } | |
854a97f0 | 3843 | |
39dd8003 NC |
3844 | if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-' |
3845 | && ! strcmp (arg + 3, f_options[j].string)) | |
3846 | { | |
3847 | *f_options[j].variable = ! f_options[j].on_value; | |
3848 | return 1; | |
3849 | } | |
3850 | } | |
b8468bc7 | 3851 | |
de6c5979 | 3852 | if (!strcmp (arg, "fast-math")) |
a01da83b | 3853 | set_fast_math_flags (); |
de6c5979 | 3854 | else if (!strcmp (arg, "no-fast-math")) |
a01da83b | 3855 | set_no_fast_math_flags (); |
de6c5979 BL |
3856 | else if ((option_value = skip_leading_substring (arg, "inline-limit-")) |
3857 | || (option_value = skip_leading_substring (arg, "inline-limit="))) | |
c6d9a88c | 3858 | { |
5262d6b6 | 3859 | int val = |
c6d9a88c MM |
3860 | read_integral_parameter (option_value, arg - 2, |
3861 | MAX_INLINE_INSNS); | |
3862 | set_param_value ("max-inline-insns", val); | |
3863 | } | |
39dd8003 | 3864 | #ifdef INSN_SCHEDULING |
6f5ef761 GDR |
3865 | else if ((option_value = skip_leading_substring (arg, "sched-verbose="))) |
3866 | fix_sched_param ("verbose", option_value); | |
3867 | #endif | |
3868 | else if ((option_value = skip_leading_substring (arg, "fixed-"))) | |
3869 | fix_register (option_value, 1, 1); | |
3870 | else if ((option_value = skip_leading_substring (arg, "call-used-"))) | |
3871 | fix_register (option_value, 0, 1); | |
3872 | else if ((option_value = skip_leading_substring (arg, "call-saved-"))) | |
3873 | fix_register (option_value, 0, 0); | |
3874 | else if ((option_value = skip_leading_substring (arg, "align-loops="))) | |
3875 | align_loops = read_integral_parameter (option_value, arg - 2, align_loops); | |
3876 | else if ((option_value = skip_leading_substring (arg, "align-functions="))) | |
4559fd9e | 3877 | align_functions |
6f5ef761 GDR |
3878 | = read_integral_parameter (option_value, arg - 2, align_functions); |
3879 | else if ((option_value = skip_leading_substring (arg, "align-jumps="))) | |
3880 | align_jumps = read_integral_parameter (option_value, arg - 2, align_jumps); | |
3881 | else if ((option_value = skip_leading_substring (arg, "align-labels="))) | |
3882 | align_labels | |
3883 | = read_integral_parameter (option_value, arg - 2, align_labels); | |
3884 | else if ((option_value | |
854a97f0 | 3885 | = skip_leading_substring (arg, "stack-limit-register="))) |
6f5ef761 GDR |
3886 | { |
3887 | int reg = decode_reg_name (option_value); | |
a157febd | 3888 | if (reg < 0) |
6f5ef761 | 3889 | error ("unrecognized register name `%s'", option_value); |
a157febd GK |
3890 | else |
3891 | stack_limit_rtx = gen_rtx_REG (Pmode, reg); | |
3892 | } | |
6f5ef761 | 3893 | else if ((option_value |
854a97f0 | 3894 | = skip_leading_substring (arg, "stack-limit-symbol="))) |
a157febd | 3895 | { |
520a57c8 | 3896 | const char *nm; |
1f8f4a0b | 3897 | nm = ggc_strdup (option_value); |
a157febd GK |
3898 | stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, nm); |
3899 | } | |
764dbbf2 GDR |
3900 | else if ((option_value |
3901 | = skip_leading_substring (arg, "message-length="))) | |
9596ddd6 GDR |
3902 | output_set_maximum_length |
3903 | (&global_dc->buffer, read_integral_parameter | |
3904 | (option_value, arg - 2, diagnostic_line_cutoff (global_dc))); | |
764dbbf2 | 3905 | else if ((option_value |
854a97f0 | 3906 | = skip_leading_substring (arg, "diagnostics-show-location="))) |
764dbbf2 GDR |
3907 | { |
3908 | if (!strcmp (option_value, "once")) | |
9596ddd6 | 3909 | diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE; |
764dbbf2 | 3910 | else if (!strcmp (option_value, "every-line")) |
9596ddd6 GDR |
3911 | diagnostic_prefixing_rule (global_dc) |
3912 | = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE; | |
764dbbf2 | 3913 | else |
1f978f5f | 3914 | error ("unrecognized option `%s'", arg - 2); |
764dbbf2 | 3915 | } |
a157febd GK |
3916 | else if (!strcmp (arg, "no-stack-limit")) |
3917 | stack_limit_rtx = NULL_RTX; | |
39dd8003 NC |
3918 | else if (!strcmp (arg, "preprocessed")) |
3919 | /* Recognise this switch but do nothing. This prevents warnings | |
4dbba876 | 3920 | about an unrecognized switch if cpplib has not been linked in. */ |
39dd8003 | 3921 | ; |
1f50b029 | 3922 | else |
39dd8003 NC |
3923 | return 0; |
3924 | ||
3925 | return 1; | |
3926 | } | |
3927 | ||
f63d1bf7 | 3928 | /* Parse a -W... command line switch. ARG is the value after the -W. |
39dd8003 NC |
3929 | It is safe to access 'ARG - 2' to generate the full switch name. |
3930 | Return the number of strings consumed. */ | |
4559fd9e | 3931 | |
39dd8003 NC |
3932 | static int |
3933 | decode_W_option (arg) | |
854a97f0 | 3934 | const char *arg; |
39dd8003 | 3935 | { |
6f5ef761 | 3936 | const char *option_value = NULL; |
39dd8003 | 3937 | int j; |
854a97f0 | 3938 | |
39dd8003 NC |
3939 | /* Search for the option in the table of binary W options. */ |
3940 | ||
b6a1cbae | 3941 | for (j = ARRAY_SIZE (W_options); j--;) |
39dd8003 NC |
3942 | { |
3943 | if (!strcmp (arg, W_options[j].string)) | |
3944 | { | |
3945 | *W_options[j].variable = W_options[j].on_value; | |
3946 | return 1; | |
3947 | } | |
3948 | ||
3949 | if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-' | |
3950 | && ! strcmp (arg + 3, W_options[j].string)) | |
3951 | { | |
3952 | *W_options[j].variable = ! W_options[j].on_value; | |
3953 | return 1; | |
3954 | } | |
3955 | } | |
3956 | ||
6f5ef761 | 3957 | if ((option_value = skip_leading_substring (arg, "id-clash-"))) |
84b77836 | 3958 | warning ("-Wid-clash-LEN is no longer supported"); |
6f5ef761 | 3959 | else if ((option_value = skip_leading_substring (arg, "larger-than-"))) |
39dd8003 | 3960 | { |
6f5ef761 | 3961 | larger_than_size = read_integral_parameter (option_value, arg - 2, -1); |
4559fd9e | 3962 | |
e9770d51 | 3963 | warn_larger_than = larger_than_size != -1; |
39dd8003 | 3964 | } |
078721e1 AC |
3965 | else if (!strcmp (arg, "unused")) |
3966 | { | |
3967 | set_Wunused (1); | |
3968 | } | |
3969 | else if (!strcmp (arg, "no-unused")) | |
3970 | { | |
3971 | set_Wunused (0); | |
3972 | } | |
39dd8003 | 3973 | else |
b8468bc7 | 3974 | return 0; |
39dd8003 NC |
3975 | |
3976 | return 1; | |
3977 | } | |
3978 | ||
f63d1bf7 | 3979 | /* Parse a -g... command line switch. ARG is the value after the -g. |
39dd8003 NC |
3980 | It is safe to access 'ARG - 2' to generate the full switch name. |
3981 | Return the number of strings consumed. */ | |
14a774a9 | 3982 | |
39dd8003 NC |
3983 | static int |
3984 | decode_g_option (arg) | |
854a97f0 | 3985 | const char *arg; |
39dd8003 | 3986 | { |
84a5b4f8 | 3987 | static unsigned level=0; |
39dd8003 NC |
3988 | /* A lot of code assumes write_symbols == NO_DEBUG if the |
3989 | debugging level is 0 (thus -gstabs1 -gstabs0 would lose track | |
3990 | of what debugging type has been selected). This records the | |
3991 | selected type. It is an error to specify more than one | |
3992 | debugging type. */ | |
3993 | static enum debug_info_type selected_debug_type = NO_DEBUG; | |
3994 | /* Non-zero if debugging format has been explicitly set. | |
3995 | -g and -ggdb don't explicitly set the debugging format so | |
3996 | -gdwarf -g3 is equivalent to -gdwarf3. */ | |
3997 | static int type_explicitly_set_p = 0; | |
3998 | /* Indexed by enum debug_info_type. */ | |
27c38fbe | 3999 | static const char *const debug_type_names[] = |
39dd8003 | 4000 | { |
7a0c8d71 | 4001 | "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff", "vms" |
39dd8003 | 4002 | }; |
854a97f0 | 4003 | |
39dd8003 NC |
4004 | /* The maximum admissible debug level value. */ |
4005 | static const unsigned max_debug_level = 3; | |
854a97f0 | 4006 | |
39dd8003 NC |
4007 | /* Look up ARG in the table. */ |
4008 | for (da = debug_args; da->arg; da++) | |
4009 | { | |
4010 | const int da_len = strlen (da->arg); | |
4011 | ||
4012 | if (da_len == 0 || ! strncmp (arg, da->arg, da_len)) | |
4013 | { | |
4014 | enum debug_info_type type = da->debug_type; | |
854a97f0 KH |
4015 | const char *p = arg + da_len; |
4016 | ||
0df6c2c7 | 4017 | if (*p && ! ISDIGIT (*p)) |
39dd8003 | 4018 | continue; |
854a97f0 | 4019 | |
39dd8003 NC |
4020 | /* A debug flag without a level defaults to level 2. |
4021 | Note we do not want to call read_integral_parameter | |
854a97f0 | 4022 | for that case since it will call atoi which |
39dd8003 | 4023 | will return zero. |
854a97f0 KH |
4024 | |
4025 | ??? We may want to generalize the interface to | |
39dd8003 NC |
4026 | read_integral_parameter to better handle this case |
4027 | if this case shows up often. */ | |
4028 | if (*p) | |
4029 | level = read_integral_parameter (p, 0, max_debug_level + 1); | |
4030 | else | |
84a5b4f8 | 4031 | level = (level == 0) ? 2 : level; |
854a97f0 | 4032 | |
39dd8003 NC |
4033 | if (da_len > 1 && *p && !strncmp (arg, "dwarf", da_len)) |
4034 | { | |
4035 | error ("use -gdwarf -g%d for DWARF v1, level %d", | |
4036 | level, level); | |
4037 | if (level == 2) | |
4038 | error ("use -gdwarf-2 for DWARF v2"); | |
4039 | } | |
854a97f0 | 4040 | |
39dd8003 NC |
4041 | if (level > max_debug_level) |
4042 | { | |
4043 | warning ("\ | |
4044 | ignoring option `%s' due to invalid debug level specification", | |
4045 | arg - 2); | |
4046 | level = debug_info_level; | |
4047 | } | |
4048 | ||
4049 | if (type == NO_DEBUG) | |
4050 | { | |
4051 | type = PREFERRED_DEBUGGING_TYPE; | |
854a97f0 | 4052 | |
39dd8003 NC |
4053 | if (da_len > 1 && strncmp (arg, "gdb", da_len) == 0) |
4054 | { | |
4055 | #if defined (DWARF2_DEBUGGING_INFO) && !defined (LINKER_DOES_NOT_WORK_WITH_DWARF2) | |
4056 | type = DWARF2_DEBUG; | |
4057 | #else | |
4058 | #ifdef DBX_DEBUGGING_INFO | |
4059 | type = DBX_DEBUG; | |
4060 | #endif | |
4061 | #endif | |
4062 | } | |
4063 | } | |
854a97f0 | 4064 | |
39dd8003 | 4065 | if (type == NO_DEBUG) |
14a774a9 | 4066 | warning ("`%s': unknown or unsupported -g option", arg - 2); |
39dd8003 NC |
4067 | |
4068 | /* Does it conflict with an already selected type? */ | |
4069 | if (type_explicitly_set_p | |
854a97f0 | 4070 | /* -g/-ggdb don't conflict with anything. */ |
39dd8003 NC |
4071 | && da->debug_type != NO_DEBUG |
4072 | && type != selected_debug_type) | |
4073 | warning ("`%s' ignored, conflicts with `-g%s'", | |
4074 | arg - 2, debug_type_names[(int) selected_debug_type]); | |
4075 | else | |
4076 | { | |
4077 | /* If the format has already been set, -g/-ggdb | |
4078 | only change the debug level. */ | |
4079 | if (type_explicitly_set_p && da->debug_type == NO_DEBUG) | |
854a97f0 KH |
4080 | /* Don't change debugging type. */ |
4081 | ; | |
39dd8003 NC |
4082 | else |
4083 | { | |
4084 | selected_debug_type = type; | |
4085 | type_explicitly_set_p = da->debug_type != NO_DEBUG; | |
4086 | } | |
854a97f0 | 4087 | |
39dd8003 NC |
4088 | write_symbols = (level == 0 |
4089 | ? NO_DEBUG | |
4090 | : selected_debug_type); | |
4091 | use_gnu_debug_info_extensions = da->use_extensions_p; | |
4092 | debug_info_level = (enum debug_info_level) level; | |
4093 | } | |
854a97f0 | 4094 | |
39dd8003 NC |
4095 | break; |
4096 | } | |
4097 | } | |
854a97f0 | 4098 | |
39dd8003 | 4099 | if (! da->arg) |
04324727 | 4100 | return 0; |
39dd8003 NC |
4101 | |
4102 | return 1; | |
4103 | } | |
4104 | ||
4105 | /* Decode the first argument in the argv as a language-independent option. | |
319ea138 | 4106 | Return the number of strings consumed. */ |
854a97f0 | 4107 | |
13eb1f7f | 4108 | static unsigned int |
319ea138 | 4109 | independent_decode_option (argc, argv) |
39dd8003 | 4110 | int argc; |
13eb1f7f | 4111 | char **argv; |
39dd8003 | 4112 | { |
13eb1f7f | 4113 | char *arg = argv[0]; |
854a97f0 | 4114 | |
39dd8003 | 4115 | if (arg[0] != '-' || arg[1] == 0) |
b8468bc7 | 4116 | { |
39dd8003 NC |
4117 | if (arg[0] == '+') |
4118 | return 0; | |
854a97f0 | 4119 | |
39dd8003 NC |
4120 | filename = arg; |
4121 | ||
4122 | return 1; | |
b8468bc7 | 4123 | } |
39dd8003 | 4124 | |
854a97f0 KH |
4125 | arg++; |
4126 | ||
39dd8003 NC |
4127 | if (!strcmp (arg, "-help")) |
4128 | { | |
4129 | display_help (); | |
cb773845 | 4130 | exit_after_options = 1; |
39dd8003 NC |
4131 | } |
4132 | ||
10501d8f CC |
4133 | if (!strcmp (arg, "-target-help")) |
4134 | { | |
4135 | display_target_options (); | |
cb773845 | 4136 | exit_after_options = 1; |
10501d8f CC |
4137 | } |
4138 | ||
f4cdc368 ZW |
4139 | if (!strcmp (arg, "-version")) |
4140 | { | |
4141 | print_version (stderr, ""); | |
cb773845 | 4142 | exit_after_options = 1; |
f4cdc368 ZW |
4143 | } |
4144 | ||
c6d9a88c MM |
4145 | /* Handle '--param <name>=<value>'. */ |
4146 | if (strcmp (arg, "-param") == 0) | |
4147 | { | |
4148 | char *equal; | |
4149 | ||
4150 | if (argc == 1) | |
4151 | { | |
4152 | error ("-param option missing argument"); | |
4153 | return 1; | |
4154 | } | |
4155 | ||
7521b913 | 4156 | /* Get the '<name>=<value>' parameter. */ |
c6d9a88c MM |
4157 | arg = argv[1]; |
4158 | /* Look for the `='. */ | |
4159 | equal = strchr (arg, '='); | |
5262d6b6 | 4160 | if (!equal) |
c6d9a88c | 4161 | error ("invalid --param option: %s", arg); |
5262d6b6 | 4162 | else |
c6d9a88c MM |
4163 | { |
4164 | int val; | |
4165 | ||
4166 | /* Zero out the `=' sign so that we get two separate strings. */ | |
4167 | *equal = '\0'; | |
4168 | /* Figure out what value is specified. */ | |
4169 | val = read_integral_parameter (equal + 1, NULL, INVALID_PARAM_VAL); | |
4170 | if (val != INVALID_PARAM_VAL) | |
4171 | set_param_value (arg, val); | |
4172 | else | |
4173 | error ("invalid parameter value `%s'", equal + 1); | |
4174 | } | |
4175 | ||
4176 | return 2; | |
4177 | } | |
5262d6b6 | 4178 | |
854a97f0 KH |
4179 | if (*arg == 'Y') |
4180 | arg++; | |
4181 | ||
13eb1f7f | 4182 | switch (*arg) |
b8468bc7 | 4183 | { |
39dd8003 NC |
4184 | default: |
4185 | return 0; | |
854a97f0 | 4186 | |
39dd8003 NC |
4187 | case 'O': |
4188 | /* Already been treated in main (). Do nothing. */ | |
4189 | break; | |
854a97f0 | 4190 | |
39dd8003 NC |
4191 | case 'm': |
4192 | set_target_switch (arg + 1); | |
4193 | break; | |
4194 | ||
4195 | case 'f': | |
4196 | return decode_f_option (arg + 1); | |
854a97f0 | 4197 | |
39dd8003 | 4198 | case 'g': |
319ea138 | 4199 | return decode_g_option (arg + 1); |
39dd8003 NC |
4200 | |
4201 | case 'd': | |
4202 | if (!strcmp (arg, "dumpbase")) | |
4203 | { | |
4204 | if (argc == 1) | |
4205 | return 0; | |
854a97f0 | 4206 | |
39dd8003 NC |
4207 | dump_base_name = argv[1]; |
4208 | return 2; | |
4209 | } | |
4210 | else | |
4211 | decode_d_option (arg + 1); | |
4212 | break; | |
4213 | ||
4214 | case 'p': | |
4215 | if (!strcmp (arg, "pedantic")) | |
4216 | pedantic = 1; | |
4217 | else if (!strcmp (arg, "pedantic-errors")) | |
4218 | flag_pedantic_errors = pedantic = 1; | |
4219 | else if (arg[1] == 0) | |
4220 | profile_flag = 1; | |
4221 | else | |
4222 | return 0; | |
4223 | break; | |
4224 | ||
4225 | case 'q': | |
4226 | if (!strcmp (arg, "quiet")) | |
4227 | quiet_flag = 1; | |
4228 | else | |
4229 | return 0; | |
4230 | break; | |
4231 | ||
4232 | case 'v': | |
4233 | if (!strcmp (arg, "version")) | |
4234 | version_flag = 1; | |
4235 | else | |
4236 | return 0; | |
4237 | break; | |
4238 | ||
4239 | case 'w': | |
4240 | if (arg[1] == 0) | |
4241 | inhibit_warnings = 1; | |
4242 | else | |
4243 | return 0; | |
4244 | break; | |
4245 | ||
4246 | case 'W': | |
4247 | if (arg[1] == 0) | |
4248 | { | |
4249 | extra_warnings = 1; | |
4250 | /* We save the value of warn_uninitialized, since if they put | |
4251 | -Wuninitialized on the command line, we need to generate a | |
4252 | warning about not using it without also specifying -O. */ | |
4253 | if (warn_uninitialized != 1) | |
4254 | warn_uninitialized = 2; | |
4255 | } | |
4256 | else | |
4257 | return decode_W_option (arg + 1); | |
4258 | break; | |
854a97f0 | 4259 | |
3db83e32 JJ |
4260 | case 'a': |
4261 | if (!strncmp (arg, "aux-info", 8)) | |
4262 | { | |
4263 | if (arg[8] == '\0') | |
4264 | { | |
4265 | if (argc == 1) | |
4266 | return 0; | |
4267 | ||
4268 | aux_info_file_name = argv[1]; | |
4269 | flag_gen_aux_info = 1; | |
4270 | return 2; | |
4271 | } | |
4272 | else if (arg[8] == '=') | |
4273 | { | |
4274 | aux_info_file_name = arg + 9; | |
4275 | flag_gen_aux_info = 1; | |
4276 | } | |
4277 | else | |
4278 | return 0; | |
4279 | } | |
4280 | else | |
4281 | return 0; | |
4282 | break; | |
4283 | ||
39dd8003 NC |
4284 | case 'o': |
4285 | if (arg[1] == 0) | |
4286 | { | |
4287 | if (argc == 1) | |
4288 | return 0; | |
854a97f0 | 4289 | |
39dd8003 NC |
4290 | asm_file_name = argv[1]; |
4291 | return 2; | |
b8468bc7 | 4292 | } |
39dd8003 NC |
4293 | return 0; |
4294 | ||
4295 | case 'G': | |
4296 | { | |
4297 | int g_switch_val; | |
4298 | int return_val; | |
854a97f0 | 4299 | |
39dd8003 NC |
4300 | if (arg[1] == 0) |
4301 | { | |
4302 | if (argc == 1) | |
4303 | return 0; | |
854a97f0 | 4304 | |
39dd8003 NC |
4305 | g_switch_val = read_integral_parameter (argv[1], 0, -1); |
4306 | return_val = 2; | |
4307 | } | |
4308 | else | |
4309 | { | |
4310 | g_switch_val = read_integral_parameter (arg + 1, 0, -1); | |
4311 | return_val = 1; | |
4312 | } | |
854a97f0 | 4313 | |
39dd8003 NC |
4314 | if (g_switch_val == -1) |
4315 | return_val = 0; | |
4316 | else | |
4317 | { | |
4318 | g_switch_set = TRUE; | |
4319 | g_switch_value = g_switch_val; | |
4320 | } | |
854a97f0 | 4321 | |
39dd8003 NC |
4322 | return return_val; |
4323 | } | |
b8468bc7 | 4324 | } |
854a97f0 | 4325 | |
b8468bc7 NC |
4326 | return 1; |
4327 | } | |
4328 | \f | |
f5e99456 NB |
4329 | /* Decode -m switches. */ |
4330 | /* Decode the switch -mNAME. */ | |
7adfcfed | 4331 | |
f5e99456 NB |
4332 | static void |
4333 | set_target_switch (name) | |
4334 | const char *name; | |
4291d9c8 | 4335 | { |
f5e99456 NB |
4336 | size_t j; |
4337 | int valid_target_option = 0; | |
4291d9c8 | 4338 | |
f5e99456 NB |
4339 | for (j = 0; j < ARRAY_SIZE (target_switches); j++) |
4340 | if (!strcmp (target_switches[j].name, name)) | |
4341 | { | |
4342 | if (target_switches[j].value < 0) | |
4343 | target_flags &= ~-target_switches[j].value; | |
4344 | else | |
4345 | target_flags |= target_switches[j].value; | |
4346 | valid_target_option = 1; | |
4347 | } | |
4291d9c8 | 4348 | |
f5e99456 NB |
4349 | #ifdef TARGET_OPTIONS |
4350 | if (!valid_target_option) | |
4351 | for (j = 0; j < ARRAY_SIZE (target_options); j++) | |
4352 | { | |
4353 | int len = strlen (target_options[j].prefix); | |
4354 | if (!strncmp (target_options[j].prefix, name, len)) | |
4355 | { | |
4356 | *target_options[j].variable = name + len; | |
4357 | valid_target_option = 1; | |
4358 | } | |
4359 | } | |
4360 | #endif | |
4291d9c8 | 4361 | |
f5e99456 | 4362 | if (!valid_target_option) |
1f978f5f | 4363 | error ("invalid option `%s'", name); |
f5e99456 NB |
4364 | } |
4365 | \f | |
4366 | /* Print version information to FILE. | |
4367 | Each line begins with INDENT (for the case where FILE is the | |
4368 | assembler output file). */ | |
4369 | ||
4370 | static void | |
4371 | print_version (file, indent) | |
4372 | FILE *file; | |
4373 | const char *indent; | |
4374 | { | |
4375 | #ifndef __VERSION__ | |
4376 | #define __VERSION__ "[?]" | |
4377 | #endif | |
4378 | fnotice (file, | |
4379 | #ifdef __GNUC__ | |
4380 | "%s%s%s version %s (%s)\n%s\tcompiled by GNU C version %s.\n" | |
4381 | #else | |
4382 | "%s%s%s version %s (%s) compiled by CC.\n" | |
4383 | #endif | |
4384 | , indent, *indent != 0 ? " " : "", | |
4385 | lang_hooks.name, version_string, TARGET_NAME, | |
4386 | indent, __VERSION__); | |
4387 | } | |
4388 | ||
4389 | /* Print an option value and return the adjusted position in the line. | |
4390 | ??? We don't handle error returns from fprintf (disk full); presumably | |
4391 | other code will catch a disk full though. */ | |
4392 | ||
4393 | static int | |
4394 | print_single_switch (file, pos, max, indent, sep, term, type, name) | |
4395 | FILE *file; | |
4396 | int pos, max; | |
4397 | const char *indent, *sep, *term, *type, *name; | |
4398 | { | |
4399 | /* The ultrix fprintf returns 0 on success, so compute the result we want | |
4400 | here since we need it for the following test. */ | |
4401 | int len = strlen (sep) + strlen (type) + strlen (name); | |
4402 | ||
4403 | if (pos != 0 | |
4404 | && pos + len > max) | |
4405 | { | |
4406 | fprintf (file, "%s", term); | |
4407 | pos = 0; | |
4408 | } | |
4409 | if (pos == 0) | |
4410 | { | |
4411 | fprintf (file, "%s", indent); | |
4412 | pos = strlen (indent); | |
4413 | } | |
4414 | fprintf (file, "%s%s%s", sep, type, name); | |
4415 | pos += len; | |
4416 | return pos; | |
4417 | } | |
4418 | ||
4419 | /* Print active target switches to FILE. | |
4420 | POS is the current cursor position and MAX is the size of a "line". | |
4421 | Each line begins with INDENT and ends with TERM. | |
4422 | Each switch is separated from the next by SEP. */ | |
4423 | ||
4424 | static void | |
4425 | print_switch_values (file, pos, max, indent, sep, term) | |
4426 | FILE *file; | |
4427 | int pos, max; | |
4428 | const char *indent, *sep, *term; | |
4429 | { | |
4430 | size_t j; | |
4431 | char **p; | |
4432 | ||
4433 | /* Print the options as passed. */ | |
4434 | ||
4435 | pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term, | |
4436 | _("options passed: "), ""); | |
4437 | ||
4438 | for (p = &save_argv[1]; *p != NULL; p++) | |
4439 | if (**p == '-') | |
4440 | { | |
4441 | /* Ignore these. */ | |
4442 | if (strcmp (*p, "-o") == 0) | |
4443 | { | |
4444 | if (p[1] != NULL) | |
4445 | p++; | |
4446 | continue; | |
4447 | } | |
4448 | if (strcmp (*p, "-quiet") == 0) | |
4449 | continue; | |
4450 | if (strcmp (*p, "-version") == 0) | |
4451 | continue; | |
4452 | if ((*p)[1] == 'd') | |
4453 | continue; | |
4454 | ||
4455 | pos = print_single_switch (file, pos, max, indent, sep, term, *p, ""); | |
4456 | } | |
4457 | if (pos > 0) | |
4458 | fprintf (file, "%s", term); | |
4459 | ||
4460 | /* Print the -f and -m options that have been enabled. | |
4461 | We don't handle language specific options but printing argv | |
4462 | should suffice. */ | |
4463 | ||
4464 | pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term, | |
4465 | _("options enabled: "), ""); | |
4466 | ||
4467 | for (j = 0; j < ARRAY_SIZE (f_options); j++) | |
4468 | if (*f_options[j].variable == f_options[j].on_value) | |
4469 | pos = print_single_switch (file, pos, max, indent, sep, term, | |
4470 | "-f", f_options[j].string); | |
4471 | ||
4472 | /* Print target specific options. */ | |
4473 | ||
4474 | for (j = 0; j < ARRAY_SIZE (target_switches); j++) | |
4475 | if (target_switches[j].name[0] != '\0' | |
4476 | && target_switches[j].value > 0 | |
4477 | && ((target_switches[j].value & target_flags) | |
4478 | == target_switches[j].value)) | |
4479 | { | |
4480 | pos = print_single_switch (file, pos, max, indent, sep, term, | |
4481 | "-m", target_switches[j].name); | |
4482 | } | |
4483 | ||
4484 | #ifdef TARGET_OPTIONS | |
4485 | for (j = 0; j < ARRAY_SIZE (target_options); j++) | |
4486 | if (*target_options[j].variable != NULL) | |
4487 | { | |
4488 | char prefix[256]; | |
4489 | sprintf (prefix, "-m%s", target_options[j].prefix); | |
4490 | pos = print_single_switch (file, pos, max, indent, sep, term, | |
4491 | prefix, *target_options[j].variable); | |
4492 | } | |
4493 | #endif | |
4494 | ||
4495 | fprintf (file, "%s", term); | |
4496 | } | |
4497 | \f | |
4498 | /* Open assembly code output file. Do this even if -fsyntax-only is | |
4499 | on, because then the driver will have provided the name of a | |
4500 | temporary file or bit bucket for us. NAME is the file specified on | |
4501 | the command line, possibly NULL. */ | |
4502 | static void | |
4503 | init_asm_output (name) | |
4504 | const char *name; | |
4505 | { | |
4506 | if (name == NULL && asm_file_name == 0) | |
4507 | asm_out_file = stdout; | |
4508 | else | |
4509 | { | |
4510 | if (asm_file_name == 0) | |
4511 | { | |
4512 | int len = strlen (dump_base_name); | |
4513 | char *dumpname = (char *) xmalloc (len + 6); | |
4514 | memcpy (dumpname, dump_base_name, len + 1); | |
4515 | strip_off_ending (dumpname, len); | |
4516 | strcat (dumpname, ".s"); | |
4517 | asm_file_name = dumpname; | |
4518 | } | |
4519 | if (!strcmp (asm_file_name, "-")) | |
4520 | asm_out_file = stdout; | |
4521 | else | |
4522 | asm_out_file = fopen (asm_file_name, "w"); | |
4523 | if (asm_out_file == 0) | |
4524 | fatal_io_error ("can't open %s for writing", asm_file_name); | |
4525 | } | |
4526 | ||
4527 | #ifdef IO_BUFFER_SIZE | |
4528 | setvbuf (asm_out_file, (char *) xmalloc (IO_BUFFER_SIZE), | |
4529 | _IOFBF, IO_BUFFER_SIZE); | |
4530 | #endif | |
4531 | ||
4532 | if (!flag_syntax_only) | |
4533 | { | |
4534 | #ifdef ASM_FILE_START | |
4535 | ASM_FILE_START (asm_out_file); | |
4536 | #endif | |
4537 | ||
4538 | #ifdef ASM_COMMENT_START | |
4539 | if (flag_verbose_asm) | |
4540 | { | |
4541 | /* Print the list of options in effect. */ | |
4542 | print_version (asm_out_file, ASM_COMMENT_START); | |
4543 | print_switch_values (asm_out_file, 0, MAX_LINE, | |
4544 | ASM_COMMENT_START, " ", "\n"); | |
4545 | /* Add a blank line here so it appears in assembler output but not | |
4546 | screen output. */ | |
4547 | fprintf (asm_out_file, "\n"); | |
4548 | } | |
4549 | #endif | |
4550 | } | |
4551 | } | |
4552 | \f | |
4553 | /* Initialization of the front end environment, before command line | |
4554 | options are parsed. Signal handlers, internationalization etc. | |
4555 | ARGV0 is main's argv[0]. */ | |
4556 | static void | |
4557 | general_init (argv0) | |
4558 | char *argv0; | |
4559 | { | |
4560 | char *p; | |
4561 | ||
4562 | p = argv0 + strlen (argv0); | |
4563 | while (p != argv0 && !IS_DIR_SEPARATOR (p[-1])) | |
4564 | --p; | |
4565 | progname = p; | |
4566 | ||
4567 | xmalloc_set_program_name (progname); | |
e1a132c6 | 4568 | |
191bf464 | 4569 | gcc_init_libintl (); |
ab87f8c8 | 4570 | |
a7023245 ZW |
4571 | /* Install handler for SIGFPE, which may be received while we do |
4572 | compile-time floating point arithmetic. */ | |
4291d9c8 RS |
4573 | signal (SIGFPE, float_signal); |
4574 | ||
a7023245 ZW |
4575 | /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */ |
4576 | #ifdef SIGSEGV | |
4577 | signal (SIGSEGV, crash_signal); | |
935d4b07 | 4578 | #endif |
a7023245 ZW |
4579 | #ifdef SIGILL |
4580 | signal (SIGILL, crash_signal); | |
4581 | #endif | |
4582 | #ifdef SIGBUS | |
4583 | signal (SIGBUS, crash_signal); | |
4584 | #endif | |
4585 | #ifdef SIGABRT | |
4586 | signal (SIGABRT, crash_signal); | |
4587 | #endif | |
4588 | #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT) | |
4589 | signal (SIGIOT, crash_signal); | |
4590 | #endif | |
854a97f0 | 4591 | |
f5e99456 NB |
4592 | /* Initialize the diagnostics reporting machinery, so option parsing |
4593 | can give warnings and errors. */ | |
4594 | diagnostic_initialize (global_dc); | |
4595 | } | |
4596 | \f | |
4597 | /* Parse command line options and set default flag values, called | |
a1f300c0 | 4598 | after language-independent option-independent initialization. Do |
f5e99456 NB |
4599 | minimal options processing. Outputting diagnostics is OK, but GC |
4600 | and identifier hashtables etc. are not initialized yet. */ | |
4601 | static void | |
4602 | parse_options_and_default_flags (argc, argv) | |
4603 | int argc; | |
4604 | char **argv; | |
4605 | { | |
4606 | int i; | |
3ac88239 | 4607 | |
f5e99456 NB |
4608 | /* Save in case md file wants to emit args as a comment. */ |
4609 | save_argc = argc; | |
4610 | save_argv = argv; | |
afe3d090 | 4611 | |
f5e99456 NB |
4612 | /* Initialize register usage now so switches may override. */ |
4613 | init_reg_sets (); | |
764dbbf2 | 4614 | |
c6d9a88c MM |
4615 | /* Register the language-independent parameters. */ |
4616 | add_params (lang_independent_params, LAST_PARAM); | |
4617 | ||
eaec9b3d | 4618 | /* Perform language-specific options initialization. */ |
77b1a921 | 4619 | (*lang_hooks.init_options) (); |
b53beeb2 | 4620 | |
4291d9c8 RS |
4621 | /* Scan to see what optimization level has been specified. That will |
4622 | determine the default value of many flags. */ | |
4623 | for (i = 1; i < argc; i++) | |
4624 | { | |
4625 | if (!strcmp (argv[i], "-O")) | |
4626 | { | |
4627 | optimize = 1; | |
16b6e120 | 4628 | optimize_size = 0; |
4291d9c8 RS |
4629 | } |
4630 | else if (argv[i][0] == '-' && argv[i][1] == 'O') | |
4631 | { | |
c6aded7c | 4632 | /* Handle -Os, -O2, -O3, -O69, ... */ |
4291d9c8 | 4633 | char *p = &argv[i][2]; |
854a97f0 | 4634 | |
c6aded7c | 4635 | if ((p[0] == 's') && (p[1] == 0)) |
16b6e120 NC |
4636 | { |
4637 | optimize_size = 1; | |
854a97f0 KH |
4638 | |
4639 | /* Optimizing for size forces optimize to be 2. */ | |
16b6e120 NC |
4640 | optimize = 2; |
4641 | } | |
c6aded7c | 4642 | else |
854a97f0 | 4643 | { |
192babfd TP |
4644 | const int optimize_val = read_integral_parameter (p, p - 2, -1); |
4645 | if (optimize_val != -1) | |
16b6e120 | 4646 | { |
192babfd | 4647 | optimize = optimize_val; |
16b6e120 NC |
4648 | optimize_size = 0; |
4649 | } | |
c6aded7c | 4650 | } |
4291d9c8 RS |
4651 | } |
4652 | } | |
4653 | ||
201556f0 JJ |
4654 | if (!optimize) |
4655 | { | |
4656 | flag_merge_constants = 0; | |
4657 | } | |
4658 | ||
4291d9c8 RS |
4659 | if (optimize >= 1) |
4660 | { | |
6731a3e3 | 4661 | flag_defer_pop = 1; |
4291d9c8 RS |
4662 | flag_thread_jumps = 1; |
4663 | #ifdef DELAY_SLOTS | |
4664 | flag_delayed_branch = 1; | |
7e89c3a3 RK |
4665 | #endif |
4666 | #ifdef CAN_DEBUG_WITHOUT_FP | |
4667 | flag_omit_frame_pointer = 1; | |
4291d9c8 | 4668 | #endif |
3ff51205 | 4669 | flag_guess_branch_prob = 1; |
57d1019b | 4670 | flag_cprop_registers = 1; |
4291d9c8 RS |
4671 | } |
4672 | ||
4673 | if (optimize >= 2) | |
4674 | { | |
db8cb48e | 4675 | flag_optimize_sibling_calls = 1; |
4291d9c8 | 4676 | flag_cse_follow_jumps = 1; |
8b3686ed | 4677 | flag_cse_skip_blocks = 1; |
7506f491 | 4678 | flag_gcse = 1; |
4291d9c8 RS |
4679 | flag_expensive_optimizations = 1; |
4680 | flag_strength_reduce = 1; | |
4681 | flag_rerun_cse_after_loop = 1; | |
6d6d0fa0 | 4682 | flag_rerun_loop_opt = 1; |
ac266247 | 4683 | flag_caller_saves = 1; |
4ac8e06e | 4684 | flag_force_mem = 1; |
ede7cd44 | 4685 | flag_peephole2 = 1; |
4291d9c8 RS |
4686 | #ifdef INSN_SCHEDULING |
4687 | flag_schedule_insns = 1; | |
4688 | flag_schedule_insns_after_reload = 1; | |
4689 | #endif | |
8c660648 | 4690 | flag_regmove = 1; |
3f9a83a9 | 4691 | flag_strict_aliasing = 1; |
b6d24183 | 4692 | flag_delete_null_pointer_checks = 1; |
58d8c980 | 4693 | flag_reorder_blocks = 1; |
4291d9c8 RS |
4694 | } |
4695 | ||
7e89c3a3 RK |
4696 | if (optimize >= 3) |
4697 | { | |
4698 | flag_inline_functions = 1; | |
2b2a8f1f | 4699 | flag_rename_registers = 1; |
7e89c3a3 RK |
4700 | } |
4701 | ||
efa3896a GK |
4702 | if (optimize < 2 || optimize_size) |
4703 | { | |
4704 | align_loops = 1; | |
4705 | align_jumps = 1; | |
4706 | align_labels = 1; | |
4707 | align_functions = 1; | |
4708 | } | |
4709 | ||
f5e99456 NB |
4710 | /* Initialize whether `char' is signed. */ |
4711 | flag_signed_char = DEFAULT_SIGNED_CHAR; | |
4712 | #ifdef DEFAULT_SHORT_ENUMS | |
4713 | /* Initialize how much space enums occupy, by default. */ | |
4714 | flag_short_enums = DEFAULT_SHORT_ENUMS; | |
4715 | #endif | |
4716 | ||
c1da383f DE |
4717 | /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can |
4718 | modify it. */ | |
4719 | target_flags = 0; | |
4720 | set_target_switch (""); | |
4721 | ||
fc85e1ad | 4722 | /* Unwind tables are always present in an ABI-conformant IA-64 |
854a97f0 | 4723 | object file, so the default should be ON. */ |
fc85e1ad AH |
4724 | #ifdef IA64_UNWIND_INFO |
4725 | flag_unwind_tables = IA64_UNWIND_INFO; | |
4726 | #endif | |
4727 | ||
4291d9c8 RS |
4728 | #ifdef OPTIMIZATION_OPTIONS |
4729 | /* Allow default optimizations to be specified on a per-machine basis. */ | |
c6aded7c | 4730 | OPTIMIZATION_OPTIONS (optimize, optimize_size); |
4291d9c8 RS |
4731 | #endif |
4732 | ||
39dd8003 NC |
4733 | /* Perform normal command line switch decoding. */ |
4734 | for (i = 1; i < argc;) | |
4291d9c8 | 4735 | { |
57883c53 MM |
4736 | int lang_processed; |
4737 | int indep_processed; | |
f88b51fc | 4738 | |
39dd8003 | 4739 | /* Give the language a chance to decode the option for itself. */ |
ee811cfd | 4740 | lang_processed = (*lang_hooks.decode_option) (argc - i, argv + i); |
43a8f6d5 | 4741 | |
57883c53 MM |
4742 | if (lang_processed >= 0) |
4743 | /* Now see if the option also has a language independent meaning. | |
4744 | Some options are both language specific and language independent, | |
4745 | eg --help. */ | |
4746 | indep_processed = independent_decode_option (argc - i, argv + i); | |
4747 | else | |
4748 | { | |
4749 | lang_processed = -lang_processed; | |
4750 | indep_processed = 0; | |
4751 | } | |
39dd8003 NC |
4752 | |
4753 | if (lang_processed || indep_processed) | |
04324727 | 4754 | i += MAX (lang_processed, indep_processed); |
39dd8003 | 4755 | else |
43a8f6d5 | 4756 | { |
854a97f0 KH |
4757 | const char *option = NULL; |
4758 | const char *lang = NULL; | |
0c70c30f | 4759 | unsigned int j; |
854a97f0 | 4760 | |
0c70c30f NC |
4761 | /* It is possible that the command line switch is not valid for the |
4762 | current language, but it is valid for another language. In order | |
4763 | to be compatible with previous versions of the compiler (which | |
4764 | did not issue an error message in this case) we check for this | |
bc83ee59 | 4765 | possibility here. If we do find a match, then if extra_warnings |
0c70c30f NC |
4766 | is set we generate a warning message, otherwise we will just |
4767 | ignore the option. */ | |
b6a1cbae | 4768 | for (j = 0; j < ARRAY_SIZE (documented_lang_options); j++) |
0c70c30f NC |
4769 | { |
4770 | option = documented_lang_options[j].option; | |
854a97f0 | 4771 | |
0c70c30f NC |
4772 | if (option == NULL) |
4773 | lang = documented_lang_options[j].description; | |
4774 | else if (! strncmp (argv[i], option, strlen (option))) | |
4775 | break; | |
4776 | } | |
4777 | ||
b6a1cbae | 4778 | if (j != ARRAY_SIZE (documented_lang_options)) |
0c70c30f NC |
4779 | { |
4780 | if (extra_warnings) | |
4781 | { | |
1f978f5f | 4782 | warning ("ignoring command line option '%s'", argv[i]); |
0c70c30f | 4783 | if (lang) |
04324727 | 4784 | warning |
1f978f5f | 4785 | ("(it is valid for %s but not the selected language)", |
04324727 | 4786 | lang); |
0c70c30f NC |
4787 | } |
4788 | } | |
337aa8ed | 4789 | else if (argv[i][0] == '-' && argv[i][1] == 'g') |
04324727 | 4790 | warning ("`%s': unknown or unsupported -g option", &argv[i][2]); |
0c70c30f | 4791 | else |
1f978f5f | 4792 | error ("unrecognized option `%s'", argv[i]); |
854a97f0 | 4793 | |
43a8f6d5 JM |
4794 | i++; |
4795 | } | |
4291d9c8 | 4796 | } |
854a97f0 | 4797 | |
a32274ad NB |
4798 | /* Set flag_no_inline before the post_options () hook. The C front |
4799 | ends use it to determine tree inlining defaults. FIXME: such | |
4800 | code should be lang-independent when all front ends use tree | |
4801 | inlining, in which case it, and this condition, should be moved | |
4802 | to the top of process_options() instead. */ | |
f246a305 RS |
4803 | if (optimize == 0) |
4804 | { | |
a2468e45 BK |
4805 | /* Inlining does not work if not optimizing, |
4806 | so force it not to be done. */ | |
f246a305 RS |
4807 | flag_no_inline = 1; |
4808 | warn_inline = 0; | |
a2468e45 | 4809 | |
ee811cfd | 4810 | /* The c_decode_option function and decode_option hook set |
a2468e45 BK |
4811 | this to `2' if -Wall is used, so we can avoid giving out |
4812 | lots of errors for people who don't realize what -Wall does. */ | |
4813 | if (warn_uninitialized == 1) | |
4814 | warning ("-Wuninitialized is not supported without -O"); | |
f246a305 RS |
4815 | } |
4816 | ||
a32274ad NB |
4817 | /* All command line options have been parsed; allow the front end to |
4818 | perform consistency checks, etc. */ | |
4819 | (*lang_hooks.post_options) (); | |
4820 | } | |
4821 | \f | |
4822 | /* Process the options that have been parsed. */ | |
4823 | static void | |
4824 | process_options () | |
4825 | { | |
4291d9c8 RS |
4826 | #ifdef OVERRIDE_OPTIONS |
4827 | /* Some machines may reject certain combinations of options. */ | |
4828 | OVERRIDE_OPTIONS; | |
4829 | #endif | |
4830 | ||
efa3896a GK |
4831 | /* Set up the align_*_log variables, defaulting them to 1 if they |
4832 | were still unset. */ | |
4833 | if (align_loops <= 0) align_loops = 1; | |
2cca7283 JH |
4834 | if (align_loops_max_skip > align_loops || !align_loops) |
4835 | align_loops_max_skip = align_loops - 1; | |
854a97f0 | 4836 | align_loops_log = floor_log2 (align_loops * 2 - 1); |
efa3896a | 4837 | if (align_jumps <= 0) align_jumps = 1; |
2cca7283 JH |
4838 | if (align_jumps_max_skip > align_jumps || !align_jumps) |
4839 | align_jumps_max_skip = align_jumps - 1; | |
854a97f0 | 4840 | align_jumps_log = floor_log2 (align_jumps * 2 - 1); |
efa3896a | 4841 | if (align_labels <= 0) align_labels = 1; |
854a97f0 | 4842 | align_labels_log = floor_log2 (align_labels * 2 - 1); |
2cca7283 JH |
4843 | if (align_labels_max_skip > align_labels || !align_labels) |
4844 | align_labels_max_skip = align_labels - 1; | |
efa3896a | 4845 | if (align_functions <= 0) align_functions = 1; |
854a97f0 KH |
4846 | align_functions_log = floor_log2 (align_functions * 2 - 1); |
4847 | ||
4291d9c8 RS |
4848 | /* Unrolling all loops implies that standard loop unrolling must also |
4849 | be done. */ | |
4850 | if (flag_unroll_all_loops) | |
4851 | flag_unroll_loops = 1; | |
4852 | /* Loop unrolling requires that strength_reduction be on also. Silently | |
4853 | turn on strength reduction here if it isn't already on. Also, the loop | |
4854 | unrolling code assumes that cse will be run after loop, so that must | |
4855 | be turned on also. */ | |
4856 | if (flag_unroll_loops) | |
4857 | { | |
4858 | flag_strength_reduce = 1; | |
4859 | flag_rerun_cse_after_loop = 1; | |
4860 | } | |
4861 | ||
b932f770 JH |
4862 | if (flag_non_call_exceptions) |
4863 | flag_asynchronous_unwind_tables = 1; | |
4864 | if (flag_asynchronous_unwind_tables) | |
4865 | flag_unwind_tables = 1; | |
4866 | ||
4291d9c8 RS |
4867 | /* Warn about options that are not supported on this machine. */ |
4868 | #ifndef INSN_SCHEDULING | |
4869 | if (flag_schedule_insns || flag_schedule_insns_after_reload) | |
4870 | warning ("instruction scheduling not supported on this target machine"); | |
4871 | #endif | |
4872 | #ifndef DELAY_SLOTS | |
4873 | if (flag_delayed_branch) | |
4874 | warning ("this target machine does not have delayed branches"); | |
4875 | #endif | |
4876 | ||
4da5f005 MM |
4877 | /* Some operating systems do not allow profiling without a frame |
4878 | pointer. */ | |
4879 | if (!TARGET_ALLOWS_PROFILING_WITHOUT_FRAME_POINTER | |
4880 | && profile_flag | |
4881 | && flag_omit_frame_pointer) | |
4882 | { | |
4883 | error ("profiling does not work without a frame pointer"); | |
4884 | flag_omit_frame_pointer = 0; | |
4885 | } | |
4886 | ||
19283265 RH |
4887 | user_label_prefix = USER_LABEL_PREFIX; |
4888 | if (flag_leading_underscore != -1) | |
4889 | { | |
854a97f0 | 4890 | /* If the default prefix is more complicated than "" or "_", |
19283265 RH |
4891 | issue a warning and ignore this option. */ |
4892 | if (user_label_prefix[0] == 0 || | |
4893 | (user_label_prefix[0] == '_' && user_label_prefix[1] == 0)) | |
4894 | { | |
4895 | user_label_prefix = flag_leading_underscore ? "_" : ""; | |
4896 | } | |
4897 | else | |
4898 | warning ("-f%sleading-underscore not supported on this target machine", | |
4899 | flag_leading_underscore ? "" : "no-"); | |
4900 | } | |
4901 | ||
4291d9c8 RS |
4902 | /* If we are in verbose mode, write out the version and maybe all the |
4903 | option flags in use. */ | |
4904 | if (version_flag) | |
4905 | { | |
3d5cdd42 | 4906 | print_version (stderr, ""); |
4291d9c8 | 4907 | if (! quiet_flag) |
3d5cdd42 | 4908 | print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n"); |
4291d9c8 RS |
4909 | } |
4910 | ||
f5e99456 NB |
4911 | if (! quiet_flag) |
4912 | time_report = 1; | |
4291d9c8 | 4913 | |
f5e99456 NB |
4914 | if (flag_syntax_only) |
4915 | { | |
4916 | write_symbols = NO_DEBUG; | |
4917 | profile_flag = 0; | |
f5e99456 | 4918 | } |
4291d9c8 | 4919 | |
f5e99456 NB |
4920 | /* Now we know write_symbols, set up the debug hooks based on it. |
4921 | By default we do nothing for debug output. */ | |
4922 | #if defined(DBX_DEBUGGING_INFO) | |
4923 | if (write_symbols == DBX_DEBUG) | |
4924 | debug_hooks = &dbx_debug_hooks; | |
4291d9c8 | 4925 | #endif |
f5e99456 NB |
4926 | #if defined(XCOFF_DEBUGGING_INFO) |
4927 | if (write_symbols == XCOFF_DEBUG) | |
4928 | debug_hooks = &xcoff_debug_hooks; | |
3d5cdd42 | 4929 | #endif |
f5e99456 NB |
4930 | #ifdef SDB_DEBUGGING_INFO |
4931 | if (write_symbols == SDB_DEBUG) | |
4932 | debug_hooks = &sdb_debug_hooks; | |
4933 | #endif | |
4934 | #ifdef DWARF_DEBUGGING_INFO | |
4935 | if (write_symbols == DWARF_DEBUG) | |
4936 | debug_hooks = &dwarf_debug_hooks; | |
4937 | #endif | |
4938 | #ifdef DWARF2_DEBUGGING_INFO | |
4939 | if (write_symbols == DWARF2_DEBUG) | |
4940 | debug_hooks = &dwarf2_debug_hooks; | |
3d5cdd42 | 4941 | #endif |
7a0c8d71 DR |
4942 | #ifdef VMS_DEBUGGING_INFO |
4943 | if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG) | |
4944 | debug_hooks = &vmsdbg_debug_hooks; | |
4945 | #endif | |
4291d9c8 | 4946 | |
f5e99456 NB |
4947 | /* If auxiliary info generation is desired, open the output file. |
4948 | This goes in the same directory as the source file--unlike | |
4949 | all the other output files. */ | |
4950 | if (flag_gen_aux_info) | |
4951 | { | |
4952 | aux_info_file = fopen (aux_info_file_name, "w"); | |
4953 | if (aux_info_file == 0) | |
4954 | fatal_io_error ("can't open %s", aux_info_file_name); | |
4955 | } | |
309a8875 | 4956 | |
f5e99456 | 4957 | if (! targetm.have_named_sections) |
4291d9c8 | 4958 | { |
f5e99456 NB |
4959 | if (flag_function_sections) |
4960 | { | |
4d6baafa | 4961 | warning ("-ffunction-sections not supported for this target"); |
f5e99456 NB |
4962 | flag_function_sections = 0; |
4963 | } | |
4964 | if (flag_data_sections) | |
4965 | { | |
4d6baafa | 4966 | warning ("-fdata-sections not supported for this target"); |
f5e99456 NB |
4967 | flag_data_sections = 0; |
4968 | } | |
4291d9c8 | 4969 | } |
f5e99456 | 4970 | |
8456b95a | 4971 | if (flag_function_sections && profile_flag) |
3d5cdd42 | 4972 | { |
4d6baafa | 4973 | warning ("-ffunction-sections disabled; it makes profiling impossible"); |
f5e99456 | 4974 | flag_function_sections = 0; |
3d5cdd42 | 4975 | } |
f5e99456 | 4976 | |
0dd0e980 JH |
4977 | #ifndef HAVE_prefetch |
4978 | if (flag_prefetch_loop_arrays) | |
4979 | { | |
4980 | warning ("-fprefetch-loop-arrays not supported for this target"); | |
4981 | flag_prefetch_loop_arrays = 0; | |
4982 | } | |
4983 | #else | |
4984 | if (flag_prefetch_loop_arrays && !HAVE_prefetch) | |
4985 | { | |
4986 | warning ("-fprefetch-loop-arrays not supported for this target (try -march switches)"); | |
4987 | flag_prefetch_loop_arrays = 0; | |
4988 | } | |
4989 | #endif | |
4990 | ||
f5e99456 NB |
4991 | #ifndef OBJECT_FORMAT_ELF |
4992 | if (flag_function_sections && write_symbols != NO_DEBUG) | |
4d6baafa | 4993 | warning ("-ffunction-sections may affect debugging on some targets"); |
f5e99456 | 4994 | #endif |
4291d9c8 | 4995 | } |
f5e99456 NB |
4996 | \f |
4997 | /* Language-independent initialization, before language-dependent | |
4998 | initialization. */ | |
4999 | static void | |
5000 | lang_independent_init () | |
5001 | { | |
5002 | decl_printable_name = decl_name; | |
5003 | lang_expand_expr = (lang_expand_expr_t) do_abort; | |
854a97f0 | 5004 | |
a1f300c0 | 5005 | /* Set the language-dependent identifier size. */ |
f5e99456 NB |
5006 | tree_code_length[(int) IDENTIFIER_NODE] |
5007 | = ((lang_hooks.identifier_size - sizeof (struct tree_common)) | |
5008 | / sizeof (tree)); | |
5009 | ||
0abc6a6a | 5010 | /* Initialize the garbage-collector, and string pools. */ |
f5e99456 NB |
5011 | init_ggc (); |
5012 | ggc_add_rtx_root (&stack_limit_rtx, 1); | |
5013 | ggc_add_tree_root (¤t_function_decl, 1); | |
5014 | ggc_add_tree_root (¤t_function_func_begin_label, 1); | |
4291d9c8 | 5015 | |
f5e99456 NB |
5016 | init_stringpool (); |
5017 | init_obstacks (); | |
5018 | ||
5019 | init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL | |
5020 | || debug_info_level == DINFO_LEVEL_VERBOSE | |
7a0c8d71 DR |
5021 | #ifdef VMS_DEBUGGING_INFO |
5022 | /* Enable line number info for traceback */ | |
5023 | || debug_info_level > DINFO_LEVEL_NONE | |
5024 | #endif | |
5025 | || flag_test_coverage | |
5026 | || warn_notreached); | |
f5e99456 NB |
5027 | init_regs (); |
5028 | init_alias_once (); | |
5029 | init_stmt (); | |
5030 | init_loop (); | |
5031 | init_reload (); | |
5032 | init_function_once (); | |
5033 | init_stor_layout_once (); | |
5034 | init_varasm_once (); | |
5035 | init_EXPR_INSN_LIST_cache (); | |
5036 | ||
5037 | /* The following initialization functions need to generate rtl, so | |
5038 | provide a dummy function context for them. */ | |
5039 | init_dummy_function_start (); | |
5040 | init_expmed (); | |
5041 | init_expr_once (); | |
5042 | if (flag_caller_saves) | |
5043 | init_caller_save (); | |
5044 | expand_dummy_function_end (); | |
5045 | } | |
5046 | \f | |
22703ccc NB |
5047 | /* Language-dependent initialization. Returns non-zero on success. */ |
5048 | static int | |
f5e99456 NB |
5049 | lang_dependent_init (name) |
5050 | const char *name; | |
4291d9c8 | 5051 | { |
f5e99456 NB |
5052 | if (dump_base_name == 0) |
5053 | dump_base_name = name ? name : "gccdump"; | |
3d5cdd42 | 5054 | |
f5e99456 NB |
5055 | /* Front-end initialization. This hook can assume that GC, |
5056 | identifier hashes etc. are set up, but debug initialization is | |
5057 | not done yet. This routine must return the original filename | |
5058 | (e.g. foo.i -> foo.c) so can correctly initialize debug output. */ | |
5059 | name = (*lang_hooks.init) (name); | |
22703ccc NB |
5060 | if (name == NULL) |
5061 | return 0; | |
4291d9c8 | 5062 | |
22703ccc NB |
5063 | /* Is this duplication necessary? */ |
5064 | name = ggc_strdup (name); | |
f5e99456 NB |
5065 | main_input_filename = input_filename = name; |
5066 | init_asm_output (name); | |
3d5cdd42 | 5067 | |
f5e99456 NB |
5068 | /* These create various _DECL nodes, so need to be called after the |
5069 | front end is initialized. */ | |
5070 | init_eh (); | |
5071 | init_optabs (); | |
3d5cdd42 | 5072 | |
f5e99456 NB |
5073 | /* Put an entry on the input file stack for the main input file. */ |
5074 | push_srcloc (input_filename, 0); | |
3d5cdd42 | 5075 | |
f5e99456 NB |
5076 | /* If dbx symbol table desired, initialize writing it and output the |
5077 | predefined types. */ | |
5078 | timevar_push (TV_SYMOUT); | |
4291d9c8 | 5079 | |
f5e99456 NB |
5080 | #ifdef DWARF2_UNWIND_INFO |
5081 | if (dwarf2out_do_frame ()) | |
5082 | dwarf2out_frame_init (); | |
5083 | #endif | |
4291d9c8 | 5084 | |
f5e99456 NB |
5085 | /* Now we have the correct original filename, we can initialize |
5086 | debug output. */ | |
5087 | (*debug_hooks->init) (name); | |
4291d9c8 | 5088 | |
f5e99456 | 5089 | timevar_pop (TV_SYMOUT); |
22703ccc NB |
5090 | |
5091 | return 1; | |
5092 | } | |
5093 | \f | |
5094 | /* Clean up: close opened files, etc. */ | |
5095 | ||
5096 | static void | |
5097 | finalize () | |
5098 | { | |
5099 | /* Close the dump files. */ | |
5100 | if (flag_gen_aux_info) | |
5101 | { | |
5102 | fclose (aux_info_file); | |
5103 | if (errorcount) | |
5104 | unlink (aux_info_file_name); | |
5105 | } | |
5106 | ||
5107 | /* Close non-debugging input and output files. Take special care to note | |
5108 | whether fclose returns an error, since the pages might still be on the | |
5109 | buffer chain while the file is open. */ | |
5110 | ||
5111 | if (asm_out_file) | |
5112 | { | |
5113 | if (ferror (asm_out_file) != 0) | |
5114 | fatal_io_error ("error writing to %s", asm_file_name); | |
5115 | if (fclose (asm_out_file) != 0) | |
5116 | fatal_io_error ("error closing %s", asm_file_name); | |
5117 | } | |
5118 | ||
5119 | /* Do whatever is necessary to finish printing the graphs. */ | |
5120 | if (graph_dump_format != no_graph) | |
5121 | { | |
5122 | int i; | |
5123 | ||
5124 | for (i = 0; i < (int) DFI_MAX; ++i) | |
5125 | if (dump_file[i].initialized && dump_file[i].graph_dump_p) | |
5126 | { | |
5127 | char seq[16]; | |
5128 | char *suffix; | |
5129 | ||
6baf9874 | 5130 | sprintf (seq, DUMPFILE_FORMAT, i); |
22703ccc NB |
5131 | suffix = concat (seq, dump_file[i].extension, NULL); |
5132 | finish_graph_dump_file (dump_base_name, suffix); | |
5133 | free (suffix); | |
5134 | } | |
5135 | } | |
5136 | ||
5137 | if (mem_report) | |
5138 | { | |
5139 | ggc_print_statistics (); | |
5140 | stringpool_statistics (); | |
5141 | dump_tree_statistics (); | |
5142 | } | |
5143 | ||
5144 | /* Free up memory for the benefit of leak detectors. */ | |
5145 | free_reg_info (); | |
5146 | ||
5147 | /* Language-specific end of compilation actions. */ | |
5148 | (*lang_hooks.finish) (); | |
f5e99456 NB |
5149 | } |
5150 | \f | |
4d6baafa NB |
5151 | /* Initialize the compiler, and compile the input file. */ |
5152 | static void | |
5153 | do_compile () | |
f5e99456 | 5154 | { |
f5e99456 NB |
5155 | /* The bulk of command line switch processing. */ |
5156 | process_options (); | |
5157 | ||
a9915c78 RK |
5158 | /* We cannot start timing until after options are processed since that |
5159 | says if we run timers or not. */ | |
5160 | init_timevar (); | |
5161 | timevar_start (TV_TOTAL); | |
5162 | ||
f5e99456 NB |
5163 | /* Language-independent initialization. Also sets up GC, identifier |
5164 | hashes etc. */ | |
5165 | lang_independent_init (); | |
5166 | ||
22703ccc NB |
5167 | /* Language-dependent initialization. Returns true on success. */ |
5168 | if (lang_dependent_init (filename)) | |
5169 | compile_file (); | |
f5e99456 | 5170 | |
22703ccc | 5171 | finalize (); |
f5e99456 NB |
5172 | |
5173 | /* Stop timing and print the times. */ | |
5174 | timevar_stop (TV_TOTAL); | |
5175 | timevar_print (stderr); | |
4d6baafa NB |
5176 | } |
5177 | \f | |
5178 | /* Entry point of cc1, cc1plus, jc1, f771, etc. | |
5179 | Decode command args, then call compile_file. | |
5180 | Exit code is FATAL_EXIT_CODE if can't open files or if there were | |
5181 | any errors, or SUCCESS_EXIT_CODE if compilation succeeded. | |
5182 | ||
5183 | It is not safe to call this function more than once. */ | |
5184 | ||
5185 | int | |
5186 | toplev_main (argc, argv) | |
5187 | int argc; | |
5188 | char **argv; | |
5189 | { | |
faf31866 KG |
5190 | hex_init (); |
5191 | ||
4d6baafa NB |
5192 | /* Initialization of GCC's environment, and diagnostics. */ |
5193 | general_init (argv [0]); | |
5194 | ||
5195 | /* Parse the options and do minimal processing; basically just | |
5196 | enough to default flags appropriately. */ | |
5197 | parse_options_and_default_flags (argc, argv); | |
5198 | ||
5199 | /* Exit early if we can (e.g. -help). */ | |
5200 | if (!exit_after_options) | |
5201 | do_compile (); | |
f5e99456 NB |
5202 | |
5203 | if (errorcount || sorrycount) | |
5204 | return (FATAL_EXIT_CODE); | |
5205 | ||
5206 | return (SUCCESS_EXIT_CODE); | |
4291d9c8 | 5207 | } |