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Commit | Line | Data |
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f2c5f623 BC |
1 | /* This file contains the definitions and documentation for the common |
2 | tree codes used in the GNU C and C++ compilers (see c-common.def | |
3 | for the standard codes). | |
4f78b9a8 RH |
4 | Copyright (C) 2000, 2001 Free Software Foundation, Inc. |
5 | Written by Benjamin Chelf (chelf@codesourcery.com). | |
f2c5f623 | 6 | |
1322177d | 7 | This file is part of GCC. |
f2c5f623 | 8 | |
1322177d LB |
9 | GCC is free software; you can redistribute it and/or modify it under |
10 | the terms of the GNU General Public License as published by the Free | |
11 | Software Foundation; either version 2, or (at your option) any later | |
12 | version. | |
f2c5f623 | 13 | |
1322177d LB |
14 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
15 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
16 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
17 | for more details. | |
f2c5f623 BC |
18 | |
19 | You should have received a copy of the GNU General Public License | |
1322177d LB |
20 | along with GCC; see the file COPYING. If not, write to the Free |
21 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
22 | 02111-1307, USA. */ | |
f2c5f623 BC |
23 | |
24 | #include "config.h" | |
25 | #include "system.h" | |
26 | #include "tree.h" | |
27 | #include "function.h" | |
28 | #include "splay-tree.h" | |
29 | #include "varray.h" | |
30 | #include "c-common.h" | |
31 | #include "except.h" | |
32 | #include "toplev.h" | |
33 | #include "flags.h" | |
34 | #include "ggc.h" | |
35 | #include "rtl.h" | |
d6684bc8 | 36 | #include "expr.h" |
f2c5f623 BC |
37 | #include "output.h" |
38 | #include "timevar.h" | |
39 | ||
54f7877c MM |
40 | /* If non-NULL, the address of a language-specific function for |
41 | expanding statements. */ | |
42 | void (*lang_expand_stmt) PARAMS ((tree)); | |
43 | ||
8f17b5c5 MM |
44 | /* If non-NULL, the address of a language-specific function for |
45 | expanding a DECL_STMT. After the language-independent cases are | |
46 | handled, this function will be called. If this function is not | |
47 | defined, it is assumed that declarations other than those for | |
48 | variables and labels do not require any RTL generation. */ | |
49 | void (*lang_expand_decl_stmt) PARAMS ((tree)); | |
50 | ||
ae499cce MM |
51 | /* Create an empty statement tree rooted at T. */ |
52 | ||
53 | void | |
54 | begin_stmt_tree (t) | |
55 | tree *t; | |
56 | { | |
57 | /* We create a trivial EXPR_STMT so that last_tree is never NULL in | |
58 | what follows. We remove the extraneous statement in | |
59 | finish_stmt_tree. */ | |
60 | *t = build_nt (EXPR_STMT, void_zero_node); | |
61 | last_tree = *t; | |
62 | last_expr_type = NULL_TREE; | |
63 | } | |
64 | ||
65 | /* T is a statement. Add it to the statement-tree. */ | |
66 | ||
56cb9733 | 67 | tree |
ae499cce MM |
68 | add_stmt (t) |
69 | tree t; | |
70 | { | |
71 | /* Add T to the statement-tree. */ | |
72 | TREE_CHAIN (last_tree) = t; | |
73 | last_tree = t; | |
0ba8a114 | 74 | |
ae499cce | 75 | /* When we expand a statement-tree, we must know whether or not the |
0ba8a114 | 76 | statements are full-expressions. We record that fact here. */ |
ae499cce | 77 | STMT_IS_FULL_EXPR_P (last_tree) = stmts_are_full_exprs_p (); |
b850de4f MM |
78 | |
79 | /* Keep track of the number of statements in this function. */ | |
80 | if (current_function_decl) | |
81 | ++DECL_NUM_STMTS (current_function_decl); | |
82 | ||
56cb9733 | 83 | return t; |
ae499cce MM |
84 | } |
85 | ||
8f17b5c5 MM |
86 | /* Create a declaration statement for the declaration given by the |
87 | DECL. */ | |
88 | ||
89 | void | |
90 | add_decl_stmt (decl) | |
91 | tree decl; | |
92 | { | |
93 | tree decl_stmt; | |
94 | ||
95 | /* We need the type to last until instantiation time. */ | |
96 | decl_stmt = build_stmt (DECL_STMT, decl); | |
97 | add_stmt (decl_stmt); | |
98 | } | |
99 | ||
100 | /* Add a scope-statement to the statement-tree. BEGIN_P indicates | |
101 | whether this statements opens or closes a scope. PARTIAL_P is true | |
102 | for a partial scope, i.e, the scope that begins after a label when | |
103 | an object that needs a cleanup is created. If BEGIN_P is nonzero, | |
104 | returns a new TREE_LIST representing the top of the SCOPE_STMT | |
105 | stack. The TREE_PURPOSE is the new SCOPE_STMT. If BEGIN_P is | |
106 | zero, returns a TREE_LIST whose TREE_VALUE is the new SCOPE_STMT, | |
0ba8a114 | 107 | and whose TREE_PURPOSE is the matching SCOPE_STMT with |
8f17b5c5 MM |
108 | SCOPE_BEGIN_P set. */ |
109 | ||
110 | tree | |
111 | add_scope_stmt (begin_p, partial_p) | |
112 | int begin_p; | |
113 | int partial_p; | |
114 | { | |
de8e49f3 | 115 | tree *stack_ptr = current_scope_stmt_stack (); |
8f17b5c5 | 116 | tree ss; |
de8e49f3 | 117 | tree top = *stack_ptr; |
8f17b5c5 MM |
118 | |
119 | /* Build the statement. */ | |
120 | ss = build_stmt (SCOPE_STMT, NULL_TREE); | |
121 | SCOPE_BEGIN_P (ss) = begin_p; | |
122 | SCOPE_PARTIAL_P (ss) = partial_p; | |
123 | ||
124 | /* Keep the scope stack up to date. */ | |
125 | if (begin_p) | |
126 | { | |
de8e49f3 NS |
127 | top = tree_cons (ss, NULL_TREE, top); |
128 | *stack_ptr = top; | |
8f17b5c5 MM |
129 | } |
130 | else | |
131 | { | |
8f17b5c5 | 132 | TREE_VALUE (top) = ss; |
de8e49f3 | 133 | *stack_ptr = TREE_CHAIN (top); |
8f17b5c5 MM |
134 | } |
135 | ||
136 | /* Add the new statement to the statement-tree. */ | |
137 | add_stmt (ss); | |
138 | ||
139 | return top; | |
140 | } | |
141 | ||
ae499cce MM |
142 | /* Finish the statement tree rooted at T. */ |
143 | ||
144 | void | |
145 | finish_stmt_tree (t) | |
146 | tree *t; | |
147 | { | |
148 | tree stmt; | |
149 | ||
150 | /* Remove the fake extra statement added in begin_stmt_tree. */ | |
151 | stmt = TREE_CHAIN (*t); | |
152 | *t = stmt; | |
153 | last_tree = NULL_TREE; | |
154 | ||
8f17b5c5 | 155 | if (cfun && stmt) |
ae499cce MM |
156 | { |
157 | /* The line-number recorded in the outermost statement in a function | |
158 | is the line number of the end of the function. */ | |
159 | STMT_LINENO (stmt) = lineno; | |
160 | STMT_LINENO_FOR_FN_P (stmt) = 1; | |
161 | } | |
162 | } | |
163 | ||
0dfdeca6 BC |
164 | /* Build a generic statement based on the given type of node and |
165 | arguments. Similar to `build_nt', except that we set | |
64094f6a RH |
166 | STMT_LINENO to be the current line number. */ |
167 | /* ??? This should be obsolete with the lineno_stmt productions | |
168 | in the grammar. */ | |
0dfdeca6 BC |
169 | |
170 | tree | |
171 | build_stmt VPARAMS ((enum tree_code code, ...)) | |
172 | { | |
b3694847 SS |
173 | tree t; |
174 | int length; | |
175 | int i; | |
0dfdeca6 | 176 | |
7a75edb7 AJ |
177 | VA_OPEN (p, code); |
178 | VA_FIXEDARG (p, enum tree_code, code); | |
0dfdeca6 BC |
179 | |
180 | t = make_node (code); | |
181 | length = TREE_CODE_LENGTH (code); | |
64094f6a | 182 | STMT_LINENO (t) = lineno; |
0dfdeca6 BC |
183 | |
184 | for (i = 0; i < length; i++) | |
185 | TREE_OPERAND (t, i) = va_arg (p, tree); | |
186 | ||
7a75edb7 | 187 | VA_CLOSE (p); |
0dfdeca6 BC |
188 | return t; |
189 | } | |
190 | ||
f2c5f623 BC |
191 | /* Some statements, like for-statements or if-statements, require a |
192 | condition. This condition can be a declaration. If T is such a | |
193 | declaration it is processed, and an expression appropriate to use | |
194 | as the condition is returned. Otherwise, T itself is returned. */ | |
195 | ||
196 | tree | |
197 | expand_cond (t) | |
198 | tree t; | |
199 | { | |
200 | if (t && TREE_CODE (t) == TREE_LIST) | |
201 | { | |
202 | expand_stmt (TREE_PURPOSE (t)); | |
203 | return TREE_VALUE (t); | |
204 | } | |
205 | else | |
206 | return t; | |
207 | } | |
208 | ||
209 | /* Create RTL for the local static variable DECL. */ | |
210 | ||
211 | void | |
212 | make_rtl_for_local_static (decl) | |
213 | tree decl; | |
214 | { | |
215 | const char *asmspec = NULL; | |
216 | ||
217 | /* If we inlined this variable, we could see it's declaration | |
218 | again. */ | |
95ee998c | 219 | if (TREE_ASM_WRITTEN (decl)) |
f2c5f623 BC |
220 | return; |
221 | ||
2c21b247 MM |
222 | /* If the DECL_ASSEMBLER_NAME is not the same as the DECL_NAME, then |
223 | either we already created RTL for this DECL (and since it was a | |
0a7394bc | 224 | local variable, its DECL_ASSEMBLER_NAME got hacked up to prevent |
2c21b247 MM |
225 | clashes with other local statics with the same name by a previous |
226 | call to make_decl_rtl), or the user explicitly requested a | |
227 | particular assembly name for this variable, using the GNU | |
228 | extension for this purpose: | |
229 | ||
230 | int i asm ("j"); | |
231 | ||
232 | There's no way to know which case we're in, here. But, it turns | |
233 | out we're safe. If there's already RTL, then | |
234 | rest_of_decl_compilation ignores the ASMSPEC parameter, so we | |
235 | may as well not pass it in. If there isn't RTL, then we didn't | |
236 | already create RTL, which means that the modification to | |
237 | DECL_ASSEMBLER_NAME came only via the explicit extension. */ | |
238 | if (DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl) | |
45dcf572 | 239 | && !DECL_RTL_SET_P (decl)) |
2c21b247 | 240 | asmspec = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)); |
f2c5f623 BC |
241 | |
242 | rest_of_decl_compilation (decl, asmspec, /*top_level=*/0, /*at_end=*/0); | |
243 | } | |
244 | ||
245 | /* Let the back-end know about DECL. */ | |
246 | ||
247 | void | |
248 | emit_local_var (decl) | |
249 | tree decl; | |
250 | { | |
251 | /* Create RTL for this variable. */ | |
19e7881c | 252 | if (!DECL_RTL_SET_P (decl)) |
f2c5f623 | 253 | { |
3645c4dc RH |
254 | if (DECL_C_HARD_REGISTER (decl)) |
255 | /* The user specified an assembler name for this variable. | |
256 | Set that up now. */ | |
f2c5f623 BC |
257 | rest_of_decl_compilation |
258 | (decl, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)), | |
259 | /*top_level=*/0, /*at_end=*/0); | |
260 | else | |
261 | expand_decl (decl); | |
262 | } | |
263 | ||
264 | /* Actually do the initialization. */ | |
265 | if (stmts_are_full_exprs_p ()) | |
266 | expand_start_target_temps (); | |
267 | ||
268 | expand_decl_init (decl); | |
269 | ||
270 | if (stmts_are_full_exprs_p ()) | |
271 | expand_end_target_temps (); | |
272 | } | |
273 | ||
ec5c56db | 274 | /* Helper for generating the RTL at the beginning of a scope. */ |
f2c5f623 BC |
275 | |
276 | void | |
277 | genrtl_do_pushlevel () | |
278 | { | |
279 | emit_line_note (input_filename, lineno); | |
280 | clear_last_expr (); | |
281 | } | |
282 | ||
ec5c56db | 283 | /* Generate the RTL for DESTINATION, which is a GOTO_STMT. */ |
f2c5f623 BC |
284 | |
285 | void | |
286 | genrtl_goto_stmt (destination) | |
287 | tree destination; | |
288 | { | |
289 | if (TREE_CODE (destination) == IDENTIFIER_NODE) | |
290 | abort (); | |
291 | ||
292 | /* We warn about unused labels with -Wunused. That means we have to | |
293 | mark the used labels as used. */ | |
294 | if (TREE_CODE (destination) == LABEL_DECL) | |
295 | TREE_USED (destination) = 1; | |
296 | ||
297 | emit_line_note (input_filename, lineno); | |
298 | ||
299 | if (TREE_CODE (destination) == LABEL_DECL) | |
300 | { | |
301 | label_rtx (destination); | |
302 | expand_goto (destination); | |
303 | } | |
304 | else | |
305 | expand_computed_goto (destination); | |
306 | } | |
307 | ||
ec5c56db | 308 | /* Generate the RTL for EXPR, which is an EXPR_STMT. */ |
f2c5f623 BC |
309 | |
310 | void | |
311 | genrtl_expr_stmt (expr) | |
312 | tree expr; | |
313 | { | |
314 | if (expr != NULL_TREE) | |
315 | { | |
316 | emit_line_note (input_filename, lineno); | |
317 | ||
318 | if (stmts_are_full_exprs_p ()) | |
319 | expand_start_target_temps (); | |
320 | ||
8f17b5c5 MM |
321 | if (expr != error_mark_node) |
322 | expand_expr_stmt (expr); | |
f2c5f623 BC |
323 | |
324 | if (stmts_are_full_exprs_p ()) | |
325 | expand_end_target_temps (); | |
326 | } | |
327 | } | |
328 | ||
ec5c56db | 329 | /* Generate the RTL for T, which is a DECL_STMT. */ |
f2c5f623 BC |
330 | |
331 | void | |
332 | genrtl_decl_stmt (t) | |
333 | tree t; | |
334 | { | |
335 | tree decl; | |
336 | emit_line_note (input_filename, lineno); | |
337 | decl = DECL_STMT_DECL (t); | |
338 | /* If this is a declaration for an automatic local | |
339 | variable, initialize it. Note that we might also see a | |
340 | declaration for a namespace-scope object (declared with | |
341 | `extern'). We don't have to handle the initialization | |
342 | of those objects here; they can only be declarations, | |
343 | rather than definitions. */ | |
344 | if (TREE_CODE (decl) == VAR_DECL | |
345 | && !TREE_STATIC (decl) | |
346 | && !DECL_EXTERNAL (decl)) | |
347 | { | |
348 | /* Let the back-end know about this variable. */ | |
349 | if (!anon_aggr_type_p (TREE_TYPE (decl))) | |
350 | emit_local_var (decl); | |
351 | else | |
352 | expand_anon_union_decl (decl, NULL_TREE, | |
353 | DECL_ANON_UNION_ELEMS (decl)); | |
354 | } | |
355 | else if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)) | |
0ba8a114 | 356 | make_rtl_for_local_static (decl); |
8f17b5c5 MM |
357 | else if (TREE_CODE (decl) == LABEL_DECL |
358 | && C_DECLARED_LABEL_FLAG (decl)) | |
359 | declare_nonlocal_label (decl); | |
360 | else if (lang_expand_decl_stmt) | |
361 | (*lang_expand_decl_stmt) (t); | |
f2c5f623 BC |
362 | } |
363 | ||
ec5c56db | 364 | /* Generate the RTL for T, which is an IF_STMT. */ |
f2c5f623 BC |
365 | |
366 | void | |
367 | genrtl_if_stmt (t) | |
368 | tree t; | |
369 | { | |
370 | tree cond; | |
371 | genrtl_do_pushlevel (); | |
372 | cond = expand_cond (IF_COND (t)); | |
373 | emit_line_note (input_filename, lineno); | |
374 | expand_start_cond (cond, 0); | |
375 | if (THEN_CLAUSE (t)) | |
376 | expand_stmt (THEN_CLAUSE (t)); | |
377 | if (ELSE_CLAUSE (t)) | |
378 | { | |
379 | expand_start_else (); | |
380 | expand_stmt (ELSE_CLAUSE (t)); | |
381 | } | |
382 | expand_end_cond (); | |
383 | } | |
384 | ||
ec5c56db | 385 | /* Generate the RTL for T, which is a WHILE_STMT. */ |
f2c5f623 BC |
386 | |
387 | void | |
388 | genrtl_while_stmt (t) | |
389 | tree t; | |
390 | { | |
391 | tree cond; | |
392 | emit_nop (); | |
393 | emit_line_note (input_filename, lineno); | |
394 | expand_start_loop (1); | |
395 | genrtl_do_pushlevel (); | |
396 | ||
397 | cond = expand_cond (WHILE_COND (t)); | |
398 | emit_line_note (input_filename, lineno); | |
399 | expand_exit_loop_if_false (0, cond); | |
57939159 | 400 | genrtl_do_pushlevel (); |
f2c5f623 BC |
401 | |
402 | expand_stmt (WHILE_BODY (t)); | |
403 | ||
404 | expand_end_loop (); | |
405 | } | |
406 | ||
ec5c56db | 407 | /* Generate the RTL for T, which is a DO_STMT. */ |
f2c5f623 BC |
408 | |
409 | void | |
410 | genrtl_do_stmt (t) | |
411 | tree t; | |
412 | { | |
d599b81f RH |
413 | tree cond = DO_COND (t); |
414 | ||
415 | /* Recognize the common special-case of do { ... } while (0) and do | |
416 | not emit the loop widgetry in this case. In particular this | |
417 | avoids cluttering the rtl with dummy loop notes, which can affect | |
418 | alignment of adjacent labels. */ | |
5f10ef5b | 419 | if (integer_zerop (cond)) |
f0de0c5d RH |
420 | { |
421 | expand_start_null_loop (); | |
422 | expand_stmt (DO_BODY (t)); | |
423 | expand_end_null_loop (); | |
424 | } | |
d599b81f RH |
425 | else |
426 | { | |
427 | emit_nop (); | |
428 | emit_line_note (input_filename, lineno); | |
429 | expand_start_loop_continue_elsewhere (1); | |
f2c5f623 | 430 | |
d599b81f | 431 | expand_stmt (DO_BODY (t)); |
f2c5f623 | 432 | |
d599b81f RH |
433 | expand_loop_continue_here (); |
434 | cond = expand_cond (cond); | |
435 | emit_line_note (input_filename, lineno); | |
436 | expand_exit_loop_if_false (0, cond); | |
437 | expand_end_loop (); | |
438 | } | |
f2c5f623 BC |
439 | } |
440 | ||
ec5c56db | 441 | /* Build the node for a return statement and return it. */ |
0dfdeca6 BC |
442 | |
443 | tree | |
444 | build_return_stmt (expr) | |
445 | tree expr; | |
446 | { | |
447 | return (build_stmt (RETURN_STMT, expr)); | |
448 | } | |
449 | ||
ec5c56db | 450 | /* Generate the RTL for STMT, which is a RETURN_STMT. */ |
f2c5f623 BC |
451 | |
452 | void | |
56cb9733 MM |
453 | genrtl_return_stmt (stmt) |
454 | tree stmt; | |
f2c5f623 | 455 | { |
0d97bf4c JM |
456 | tree expr; |
457 | ||
07b2f2fd | 458 | expr = RETURN_EXPR (stmt); |
56cb9733 | 459 | |
f2c5f623 | 460 | emit_line_note (input_filename, lineno); |
56cb9733 MM |
461 | if (!expr) |
462 | expand_null_return (); | |
463 | else | |
464 | { | |
465 | expand_start_target_temps (); | |
466 | expand_return (expr); | |
467 | expand_end_target_temps (); | |
468 | } | |
f2c5f623 BC |
469 | } |
470 | ||
ec5c56db | 471 | /* Generate the RTL for T, which is a FOR_STMT. */ |
f2c5f623 BC |
472 | |
473 | void | |
474 | genrtl_for_stmt (t) | |
475 | tree t; | |
476 | { | |
f2c5f623 | 477 | tree cond; |
8f17b5c5 MM |
478 | const char *saved_filename; |
479 | int saved_lineno; | |
480 | ||
f2c5f623 BC |
481 | if (NEW_FOR_SCOPE_P (t)) |
482 | genrtl_do_pushlevel (); | |
483 | ||
484 | expand_stmt (FOR_INIT_STMT (t)); | |
485 | ||
8f17b5c5 | 486 | /* Expand the initialization. */ |
f2c5f623 BC |
487 | emit_nop (); |
488 | emit_line_note (input_filename, lineno); | |
489 | expand_start_loop_continue_elsewhere (1); | |
490 | genrtl_do_pushlevel (); | |
491 | cond = expand_cond (FOR_COND (t)); | |
8f17b5c5 MM |
492 | |
493 | /* Save the filename and line number so that we expand the FOR_EXPR | |
494 | we can reset them back to the saved values. */ | |
495 | saved_filename = input_filename; | |
496 | saved_lineno = lineno; | |
497 | ||
498 | /* Expand the condition. */ | |
f2c5f623 BC |
499 | emit_line_note (input_filename, lineno); |
500 | if (cond) | |
501 | expand_exit_loop_if_false (0, cond); | |
f2c5f623 | 502 | |
8f17b5c5 MM |
503 | /* Expand the body. */ |
504 | genrtl_do_pushlevel (); | |
f2c5f623 BC |
505 | expand_stmt (FOR_BODY (t)); |
506 | ||
8f17b5c5 MM |
507 | /* Expand the increment expression. */ |
508 | input_filename = saved_filename; | |
509 | lineno = saved_lineno; | |
f2c5f623 BC |
510 | emit_line_note (input_filename, lineno); |
511 | expand_loop_continue_here (); | |
8f17b5c5 MM |
512 | if (FOR_EXPR (t)) |
513 | genrtl_expr_stmt (FOR_EXPR (t)); | |
f2c5f623 BC |
514 | expand_end_loop (); |
515 | } | |
516 | ||
ec5c56db | 517 | /* Build a break statement node and return it. */ |
0dfdeca6 BC |
518 | |
519 | tree | |
520 | build_break_stmt () | |
521 | { | |
522 | return (build_stmt (BREAK_STMT)); | |
523 | } | |
524 | ||
ec5c56db | 525 | /* Generate the RTL for a BREAK_STMT. */ |
f2c5f623 BC |
526 | |
527 | void | |
528 | genrtl_break_stmt () | |
529 | { | |
530 | emit_line_note (input_filename, lineno); | |
531 | if ( ! expand_exit_something ()) | |
532 | error ("break statement not within loop or switch"); | |
533 | } | |
534 | ||
ec5c56db | 535 | /* Build a continue statement node and return it. */ |
0dfdeca6 BC |
536 | |
537 | tree | |
538 | build_continue_stmt () | |
539 | { | |
540 | return (build_stmt (CONTINUE_STMT)); | |
541 | } | |
542 | ||
ec5c56db | 543 | /* Generate the RTL for a CONTINUE_STMT. */ |
f2c5f623 BC |
544 | |
545 | void | |
546 | genrtl_continue_stmt () | |
547 | { | |
548 | emit_line_note (input_filename, lineno); | |
549 | if (! expand_continue_loop (0)) | |
550 | error ("continue statement not within a loop"); | |
551 | } | |
552 | ||
ec5c56db | 553 | /* Generate the RTL for T, which is a SCOPE_STMT. */ |
f2c5f623 BC |
554 | |
555 | void | |
556 | genrtl_scope_stmt (t) | |
557 | tree t; | |
558 | { | |
7b2b3f29 MM |
559 | tree block = SCOPE_STMT_BLOCK (t); |
560 | ||
f2c5f623 BC |
561 | if (!SCOPE_NO_CLEANUPS_P (t)) |
562 | { | |
563 | if (SCOPE_BEGIN_P (t)) | |
7b2b3f29 | 564 | expand_start_bindings_and_block (2 * SCOPE_NULLIFIED_P (t), block); |
f2c5f623 BC |
565 | else if (SCOPE_END_P (t)) |
566 | expand_end_bindings (NULL_TREE, !SCOPE_NULLIFIED_P (t), 0); | |
567 | } | |
568 | else if (!SCOPE_NULLIFIED_P (t)) | |
569 | { | |
570 | rtx note = emit_note (NULL, | |
571 | (SCOPE_BEGIN_P (t) | |
572 | ? NOTE_INSN_BLOCK_BEG | |
573 | : NOTE_INSN_BLOCK_END)); | |
7b2b3f29 MM |
574 | NOTE_BLOCK (note) = block; |
575 | } | |
576 | ||
577 | /* If we're at the end of a scope that contains inlined nested | |
578 | functions, we have to decide whether or not to write them out. */ | |
579 | if (block && SCOPE_END_P (t)) | |
580 | { | |
581 | tree fn; | |
582 | ||
583 | for (fn = BLOCK_VARS (block); fn; fn = TREE_CHAIN (fn)) | |
584 | { | |
585 | if (TREE_CODE (fn) == FUNCTION_DECL | |
586 | && DECL_CONTEXT (fn) == current_function_decl | |
587 | && !TREE_ASM_WRITTEN (fn) | |
588 | && TREE_ADDRESSABLE (fn)) | |
589 | { | |
590 | push_function_context (); | |
591 | output_inline_function (fn); | |
592 | pop_function_context (); | |
593 | } | |
594 | } | |
f2c5f623 BC |
595 | } |
596 | } | |
597 | ||
ec5c56db | 598 | /* Generate the RTL for T, which is a SWITCH_STMT. */ |
f2c5f623 BC |
599 | |
600 | void | |
601 | genrtl_switch_stmt (t) | |
602 | tree t; | |
603 | { | |
604 | tree cond; | |
605 | genrtl_do_pushlevel (); | |
606 | ||
607 | cond = expand_cond (SWITCH_COND (t)); | |
56cb9733 | 608 | if (cond == error_mark_node) |
f2c5f623 | 609 | /* The code is in error, but we don't want expand_end_case to |
ec5c56db | 610 | crash. */ |
56cb9733 | 611 | cond = boolean_false_node; |
f2c5f623 | 612 | |
56cb9733 MM |
613 | emit_line_note (input_filename, lineno); |
614 | expand_start_case (1, cond, TREE_TYPE (cond), "switch statement"); | |
f2c5f623 | 615 | expand_stmt (SWITCH_BODY (t)); |
f2c5f623 BC |
616 | expand_end_case (cond); |
617 | } | |
618 | ||
ec5c56db | 619 | /* Create a CASE_LABEL tree node and return it. */ |
0dfdeca6 BC |
620 | |
621 | tree | |
56cb9733 | 622 | build_case_label (low_value, high_value, label_decl) |
0dfdeca6 BC |
623 | tree low_value; |
624 | tree high_value; | |
56cb9733 | 625 | tree label_decl; |
0dfdeca6 | 626 | { |
56cb9733 | 627 | return build_stmt (CASE_LABEL, low_value, high_value, label_decl); |
0dfdeca6 BC |
628 | } |
629 | ||
630 | ||
ec5c56db | 631 | /* Generate the RTL for a CASE_LABEL. */ |
f2c5f623 BC |
632 | |
633 | void | |
56cb9733 MM |
634 | genrtl_case_label (case_label) |
635 | tree case_label; | |
f2c5f623 | 636 | { |
56cb9733 | 637 | tree duplicate; |
8f17b5c5 MM |
638 | tree cleanup; |
639 | ||
640 | cleanup = last_cleanup_this_contour (); | |
641 | if (cleanup) | |
642 | { | |
643 | static int explained = 0; | |
644 | warning_with_decl (TREE_PURPOSE (cleanup), | |
645 | "destructor needed for `%#D'"); | |
646 | warning ("where case label appears here"); | |
647 | if (!explained) | |
648 | { | |
649 | warning ("(enclose actions of previous case statements requiring destructors in their own scope.)"); | |
650 | explained = 1; | |
651 | } | |
652 | } | |
653 | ||
56cb9733 MM |
654 | add_case_node (CASE_LOW (case_label), CASE_HIGH (case_label), |
655 | CASE_LABEL_DECL (case_label), &duplicate); | |
f2c5f623 BC |
656 | } |
657 | ||
ec5c56db | 658 | /* Generate the RTL for T, which is a COMPOUND_STMT. */ |
f2c5f623 | 659 | |
4cf88f57 BC |
660 | void |
661 | genrtl_compound_stmt (t) | |
662 | tree t; | |
f2c5f623 | 663 | { |
91088ddb JM |
664 | #ifdef ENABLE_CHECKING |
665 | struct nesting *n = current_nesting_level (); | |
666 | #endif | |
667 | ||
f2c5f623 | 668 | expand_stmt (COMPOUND_BODY (t)); |
91088ddb JM |
669 | |
670 | #ifdef ENABLE_CHECKING | |
671 | /* Make sure that we've pushed and popped the same number of levels. */ | |
672 | if (n != current_nesting_level ()) | |
673 | abort (); | |
674 | #endif | |
f2c5f623 BC |
675 | } |
676 | ||
ec5c56db | 677 | /* Generate the RTL for an ASM_STMT. */ |
f2c5f623 BC |
678 | |
679 | void | |
680 | genrtl_asm_stmt (cv_qualifier, string, output_operands, | |
4f78b9a8 | 681 | input_operands, clobbers, asm_input_p) |
f2c5f623 BC |
682 | tree cv_qualifier; |
683 | tree string; | |
684 | tree output_operands; | |
685 | tree input_operands; | |
686 | tree clobbers; | |
4f78b9a8 | 687 | int asm_input_p; |
f2c5f623 | 688 | { |
f2c5f623 BC |
689 | if (cv_qualifier != NULL_TREE |
690 | && cv_qualifier != ridpointers[(int) RID_VOLATILE]) | |
691 | { | |
692 | warning ("%s qualifier ignored on asm", | |
693 | IDENTIFIER_POINTER (cv_qualifier)); | |
694 | cv_qualifier = NULL_TREE; | |
695 | } | |
696 | ||
697 | emit_line_note (input_filename, lineno); | |
4f78b9a8 | 698 | if (asm_input_p) |
f2c5f623 | 699 | expand_asm (string); |
4f78b9a8 RH |
700 | else |
701 | c_expand_asm_operands (string, output_operands, input_operands, | |
702 | clobbers, cv_qualifier != NULL_TREE, | |
703 | input_filename, lineno); | |
f2c5f623 BC |
704 | } |
705 | ||
ec5c56db | 706 | /* Generate the RTL for a DECL_CLEANUP. */ |
f2c5f623 BC |
707 | |
708 | void | |
709 | genrtl_decl_cleanup (decl, cleanup) | |
710 | tree decl; | |
711 | tree cleanup; | |
712 | { | |
713 | if (!decl || (DECL_SIZE (decl) && TREE_TYPE (decl) != error_mark_node)) | |
714 | expand_decl_cleanup (decl, cleanup); | |
715 | } | |
716 | ||
54f7877c MM |
717 | /* We're about to expand T, a statement. Set up appropriate context |
718 | for the substitution. */ | |
719 | ||
720 | void | |
721 | prep_stmt (t) | |
722 | tree t; | |
723 | { | |
724 | if (!STMT_LINENO_FOR_FN_P (t)) | |
725 | lineno = STMT_LINENO (t); | |
726 | current_stmt_tree ()->stmts_are_full_exprs_p = STMT_IS_FULL_EXPR_P (t); | |
727 | } | |
728 | ||
4cf88f57 | 729 | /* Generate the RTL for the statement T, its substatements, and any |
ec5c56db | 730 | other statements at its nesting level. */ |
4cf88f57 | 731 | |
54f7877c | 732 | void |
f2c5f623 BC |
733 | expand_stmt (t) |
734 | tree t; | |
735 | { | |
54f7877c MM |
736 | while (t && t != error_mark_node) |
737 | { | |
738 | int saved_stmts_are_full_exprs_p; | |
739 | ||
740 | /* Set up context appropriately for handling this statement. */ | |
741 | saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p (); | |
742 | prep_stmt (t); | |
743 | ||
744 | switch (TREE_CODE (t)) | |
745 | { | |
746 | case RETURN_STMT: | |
56cb9733 | 747 | genrtl_return_stmt (t); |
54f7877c MM |
748 | break; |
749 | ||
750 | case EXPR_STMT: | |
751 | genrtl_expr_stmt (EXPR_STMT_EXPR (t)); | |
752 | break; | |
753 | ||
754 | case DECL_STMT: | |
755 | genrtl_decl_stmt (t); | |
756 | break; | |
757 | ||
758 | case FOR_STMT: | |
759 | genrtl_for_stmt (t); | |
760 | break; | |
761 | ||
762 | case WHILE_STMT: | |
763 | genrtl_while_stmt (t); | |
764 | break; | |
765 | ||
766 | case DO_STMT: | |
767 | genrtl_do_stmt (t); | |
768 | break; | |
769 | ||
770 | case IF_STMT: | |
771 | genrtl_if_stmt (t); | |
772 | break; | |
773 | ||
774 | case COMPOUND_STMT: | |
775 | genrtl_compound_stmt (t); | |
776 | break; | |
777 | ||
778 | case BREAK_STMT: | |
779 | genrtl_break_stmt (); | |
780 | break; | |
781 | ||
782 | case CONTINUE_STMT: | |
783 | genrtl_continue_stmt (); | |
784 | break; | |
785 | ||
786 | case SWITCH_STMT: | |
787 | genrtl_switch_stmt (t); | |
788 | break; | |
789 | ||
790 | case CASE_LABEL: | |
56cb9733 | 791 | genrtl_case_label (t); |
54f7877c MM |
792 | break; |
793 | ||
794 | case LABEL_STMT: | |
795 | expand_label (LABEL_STMT_LABEL (t)); | |
796 | break; | |
797 | ||
798 | case GOTO_STMT: | |
799 | genrtl_goto_stmt (GOTO_DESTINATION (t)); | |
800 | break; | |
801 | ||
802 | case ASM_STMT: | |
803 | genrtl_asm_stmt (ASM_CV_QUAL (t), ASM_STRING (t), | |
4f78b9a8 RH |
804 | ASM_OUTPUTS (t), ASM_INPUTS (t), |
805 | ASM_CLOBBERS (t), ASM_INPUT_P (t)); | |
54f7877c MM |
806 | break; |
807 | ||
8f17b5c5 MM |
808 | case SCOPE_STMT: |
809 | genrtl_scope_stmt (t); | |
810 | break; | |
811 | ||
54f7877c MM |
812 | default: |
813 | if (lang_expand_stmt) | |
814 | (*lang_expand_stmt) (t); | |
815 | else | |
816 | abort (); | |
817 | break; | |
818 | } | |
819 | ||
820 | /* Restore saved state. */ | |
e92044c3 RK |
821 | current_stmt_tree ()->stmts_are_full_exprs_p |
822 | = saved_stmts_are_full_exprs_p; | |
54f7877c MM |
823 | |
824 | /* Go on to the next statement in this scope. */ | |
825 | t = TREE_CHAIN (t); | |
826 | } | |
f2c5f623 | 827 | } |
4cf88f57 | 828 |