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1 /* Register Transfer Language (RTL) definitions for GNU C-Compiler
2 Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001 Free Software Foundation, Inc.
4
5 This file is part of GNU CC.
6
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
10 any later version.
11
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
21
22 #ifndef _RTL_H
23 #define _RTL_H
24
25 struct function;
26
27 #include "machmode.h"
28
29 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
30 #undef FLOAT /* Likewise. */
31 #undef ABS /* Likewise. */
32 #undef PC /* Likewise. */
33
34 #ifndef TREE_CODE
35 union tree_node;
36 #endif
37
38 /* Register Transfer Language EXPRESSIONS CODES */
39
40 #define RTX_CODE enum rtx_code
41 enum rtx_code {
42
43 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
44 #include "rtl.def" /* rtl expressions are documented here */
45 #undef DEF_RTL_EXPR
46
47 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
48 NUM_RTX_CODE.
49 Assumes default enum value assignment. */
50
51 #define NUM_RTX_CODE ((int)LAST_AND_UNUSED_RTX_CODE)
52 /* The cast here, saves many elsewhere. */
53
54 extern const int rtx_length[];
55 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
56
57 extern const char * const rtx_name[];
58 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
59
60 extern const char * const rtx_format[];
61 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
62
63 extern const char rtx_class[];
64 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
65 \f
66 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
67 relative to which the offsets are calculated, as explained in rtl.def. */
68 typedef struct
69 {
70 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
71 unsigned min_align: 8;
72 /* Flags: */
73 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */
74 unsigned min_after_vec: 1; /* minimum address target label is after the ADDR_DIFF_VEC. */
75 unsigned max_after_vec: 1; /* maximum address target label is after the ADDR_DIFF_VEC. */
76 unsigned min_after_base: 1; /* minimum address target label is after BASE. */
77 unsigned max_after_base: 1; /* maximum address target label is after BASE. */
78 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
79 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
80 unsigned : 2;
81 unsigned scale : 8;
82 } addr_diff_vec_flags;
83
84 /* Common union for an element of an rtx. */
85
86 typedef union rtunion_def
87 {
88 HOST_WIDE_INT rtwint;
89 int rtint;
90 unsigned int rtuint;
91 const char *rtstr;
92 struct rtx_def *rtx;
93 struct rtvec_def *rtvec;
94 enum machine_mode rttype;
95 addr_diff_vec_flags rt_addr_diff_vec_flags;
96 struct cselib_val_struct *rt_cselib;
97 struct bitmap_head_def *rtbit;
98 union tree_node *rttree;
99 struct basic_block_def *bb;
100 } rtunion;
101
102 /* RTL expression ("rtx"). */
103
104 typedef struct rtx_def
105 {
106 /* The kind of expression this is. */
107 ENUM_BITFIELD(rtx_code) code: 16;
108
109 /* The kind of value the expression has. */
110 ENUM_BITFIELD(machine_mode) mode : 8;
111
112 /* 1 in an INSN if it can alter flow of control
113 within this function.
114 LINK_COST_ZERO in an INSN_LIST. */
115 unsigned int jump : 1;
116 /* 1 in an INSN if it can call another function.
117 LINK_COST_FREE in an INSN_LIST. */
118 unsigned int call : 1;
119 /* 1 in a REG if value of this expression will never change during
120 the current function, even though it is not manifestly constant.
121 1 in a MEM if contents of memory are constant. This does not
122 necessarily mean that the value of this expression is constant.
123 1 in a SUBREG if it is from a promoted variable that is unsigned.
124 1 in a SYMBOL_REF if it addresses something in the per-function
125 constants pool.
126 1 in a CALL_INSN if it is a const call.
127 1 in a JUMP_INSN if it is a branch that should be annulled. Valid from
128 reorg until end of compilation; cleared before used. */
129 unsigned int unchanging : 1;
130 /* 1 in a MEM expression if contents of memory are volatile.
131 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL or BARRIER
132 if it is deleted.
133 1 in a REG expression if corresponds to a variable declared by the user.
134 0 for an internally generated temporary.
135 In a SYMBOL_REF, this flag is used for machine-specific purposes.
136 In a LABEL_REF or in a REG_LABEL note, this is LABEL_REF_NONLOCAL_P. */
137 unsigned int volatil : 1;
138 /* 1 in a MEM referring to a field of an aggregate.
139 0 if the MEM was a variable or the result of a * operator in C;
140 1 if it was the result of a . or -> operator (on a struct) in C.
141 1 in a REG if the register is used only in exit code a loop.
142 1 in a SUBREG expression if was generated from a variable with a
143 promoted mode.
144 1 in a CODE_LABEL if the label is used for nonlocal gotos
145 and must not be deleted even if its count is zero.
146 1 in a LABEL_REF if this is a reference to a label outside the
147 current loop.
148 1 in an INSN, JUMP_INSN, or CALL_INSN if this insn must be scheduled
149 together with the preceding insn. Valid only within sched.
150 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
151 from the target of a branch. Valid from reorg until end of compilation;
152 cleared before used.
153 1 in an INSN if this insn is dead code. Valid only during
154 dead-code elimination phase; cleared before use. */
155 unsigned int in_struct : 1;
156 /* 1 if this rtx is used. This is used for copying shared structure.
157 See `unshare_all_rtl'.
158 In a REG, this is not needed for that purpose, and used instead
159 in `leaf_renumber_regs_insn'.
160 In a SYMBOL_REF, means that emit_library_call
161 has used it as the function. */
162 unsigned int used : 1;
163 /* Nonzero if this rtx came from procedure integration.
164 In a REG, nonzero means this reg refers to the return value
165 of the current function. */
166 unsigned integrated : 1;
167 /* 1 in an INSN or a SET if this rtx is related to the call frame,
168 either changing how we compute the frame address or saving and
169 restoring registers in the prologue and epilogue.
170 1 in a MEM if the MEM refers to a scalar, rather than a member of
171 an aggregate.
172 1 in a REG if the register is a pointer.
173 1 in a SYMBOL_REF if it addresses something in the per-function
174 constant string pool. */
175 unsigned frame_related : 1;
176
177 /* The first element of the operands of this rtx.
178 The number of operands and their types are controlled
179 by the `code' field, according to rtl.def. */
180 rtunion fld[1];
181 } *rtx;
182
183 #define NULL_RTX (rtx) 0
184
185 /* Define macros to access the `code' field of the rtx. */
186
187 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
188 #define PUT_CODE(RTX, CODE) ((RTX)->code = (ENUM_BITFIELD(rtx_code)) (CODE))
189
190 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
191 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (ENUM_BITFIELD(machine_mode)) (MODE))
192
193 #define RTX_INTEGRATED_P(RTX) ((RTX)->integrated)
194 #define RTX_UNCHANGING_P(RTX) ((RTX)->unchanging)
195 #define RTX_FRAME_RELATED_P(RTX) ((RTX)->frame_related)
196
197 /* RTL vector. These appear inside RTX's when there is a need
198 for a variable number of things. The principle use is inside
199 PARALLEL expressions. */
200
201 typedef struct rtvec_def{
202 int num_elem; /* number of elements */
203 struct rtx_def *elem[1];
204 } *rtvec;
205
206 #define NULL_RTVEC (rtvec) 0
207
208 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
209 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
210
211 /* Predicate yielding nonzero iff X is an rtl for a register. */
212 #define REG_P(X) (GET_CODE (X) == REG)
213
214 /* Predicate yielding nonzero iff X is a label insn. */
215 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
216
217 /* Predicate yielding nonzero iff X is a jump insn. */
218 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
219
220 /* Predicate yielding nonzero iff X is a note insn. */
221 #define NOTE_P(X) (GET_CODE (X) == NOTE)
222
223 /* Predicate yielding nonzero iff X is a barrier insn. */
224 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
225
226 /* Predicate yielding nonzero iff X is a data for a jump table. */
227 #define JUMP_TABLE_DATA_P(INSN) \
228 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
229 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
230
231 /* 1 if X is a constant value that is an integer. */
232
233 #define CONSTANT_P(X) \
234 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
235 || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE \
236 || GET_CODE (X) == CONST || GET_CODE (X) == HIGH \
237 || GET_CODE (X) == CONSTANT_P_RTX)
238
239 /* General accessor macros for accessing the fields of an rtx. */
240
241 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
242 /* The bit with a star outside the statement expr and an & inside is
243 so that N can be evaluated only once. */
244 #define RTL_CHECK1(RTX, N, C1) __extension__ \
245 (*({ rtx _rtx = (RTX); int _n = (N); \
246 enum rtx_code _code = GET_CODE (_rtx); \
247 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
248 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, __FUNCTION__); \
249 if (GET_RTX_FORMAT(_code)[_n] != C1) \
250 rtl_check_failed_type1(_rtx, _n, C1, __FILE__, __LINE__, __FUNCTION__); \
251 &_rtx->fld[_n]; }))
252
253 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
254 (*({ rtx _rtx = (RTX); int _n = (N); \
255 enum rtx_code _code = GET_CODE (_rtx); \
256 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
257 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, __FUNCTION__); \
258 if (GET_RTX_FORMAT(_code)[_n] != C1 \
259 && GET_RTX_FORMAT(_code)[_n] != C2) \
260 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
261 __FUNCTION__); \
262 &_rtx->fld[_n]; }))
263
264 #define RTL_CHECKC1(RTX, N, C) __extension__ \
265 (*({ rtx _rtx = (RTX); int _n = (N); \
266 if (GET_CODE (_rtx) != C) \
267 rtl_check_failed_code1 (_rtx, C, __FILE__, __LINE__, __FUNCTION__); \
268 &_rtx->fld[_n]; }))
269
270 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
271 (*({ rtx _rtx = (RTX); int _n = (N); \
272 enum rtx_code _code = GET_CODE (_rtx); \
273 if (_code != C1 && _code != C2) \
274 rtl_check_failed_code2(_rtx, C1, C2, __FILE__, __LINE__, __FUNCTION__); \
275 &_rtx->fld[_n]; }))
276
277 #define RTVEC_ELT(RTVEC, I) __extension__ \
278 (*({ rtvec _rtvec = (RTVEC); int _i = (I); \
279 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
280 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
281 __FUNCTION__); \
282 &_rtvec->elem[_i]; }))
283
284 extern void rtl_check_failed_bounds PARAMS ((rtx, int,
285 const char *, int, const char *))
286 ATTRIBUTE_NORETURN;
287 extern void rtl_check_failed_type1 PARAMS ((rtx, int, int,
288 const char *, int, const char *))
289 ATTRIBUTE_NORETURN;
290 extern void rtl_check_failed_type2 PARAMS ((rtx, int, int, int,
291 const char *, int, const char *))
292 ATTRIBUTE_NORETURN;
293 extern void rtl_check_failed_code1 PARAMS ((rtx, enum rtx_code,
294 const char *, int, const char *))
295 ATTRIBUTE_NORETURN;
296 extern void rtl_check_failed_code2 PARAMS ((rtx, enum rtx_code, enum rtx_code,
297 const char *, int, const char *))
298 ATTRIBUTE_NORETURN;
299 extern void rtvec_check_failed_bounds PARAMS ((rtvec, int,
300 const char *, int, const char *))
301 ATTRIBUTE_NORETURN;
302
303 #else /* not ENABLE_RTL_CHECKING */
304
305 #define RTL_CHECK1(RTX, N, C1) ((RTX)->fld[N])
306 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->fld[N])
307 #define RTL_CHECKC1(RTX, N, C) ((RTX)->fld[N])
308 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->fld[N])
309 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
310
311 #endif
312
313 #define XWINT(RTX, N) (RTL_CHECK1(RTX, N, 'w').rtwint)
314 #define XINT(RTX, N) (RTL_CHECK2(RTX, N, 'i', 'n').rtint)
315 #define XSTR(RTX, N) (RTL_CHECK2(RTX, N, 's', 'S').rtstr)
316 #define XEXP(RTX, N) (RTL_CHECK2(RTX, N, 'e', 'u').rtx)
317 #define XVEC(RTX, N) (RTL_CHECK2(RTX, N, 'E', 'V').rtvec)
318 #define XMODE(RTX, N) (RTL_CHECK1(RTX, N, 'M').rttype)
319 #define XBITMAP(RTX, N) (RTL_CHECK1(RTX, N, 'b').rtbit)
320 #define XTREE(RTX, N) (RTL_CHECK1(RTX, N, 't').rttree)
321 #define XBBDEF(RTX, N) (RTL_CHECK1(RTX, N, 'B').bb)
322
323 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
324 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
325
326 /* These are like XWINT, etc. except that they expect a '0' field instead
327 of the normal type code. */
328
329 #define X0WINT(RTX, N) (RTL_CHECK1(RTX, N, '0').rtwint)
330 #define X0INT(RTX, N) (RTL_CHECK1(RTX, N, '0').rtint)
331 #define X0UINT(RTX, N) (RTL_CHECK1(RTX, N, '0').rtuint)
332 #define X0STR(RTX, N) (RTL_CHECK1(RTX, N, '0').rtstr)
333 #define X0EXP(RTX, N) (RTL_CHECK1(RTX, N, '0').rtx)
334 #define X0VEC(RTX, N) (RTL_CHECK1(RTX, N, '0').rtvec)
335 #define X0MODE(RTX, N) (RTL_CHECK1(RTX, N, '0').rttype)
336 #define X0BITMAP(RTX, N) (RTL_CHECK1(RTX, N, '0').rtbit)
337 #define X0TREE(RTX, N) (RTL_CHECK1(RTX, N, '0').rttree)
338 #define X0BBDEF(RTX, N) (RTL_CHECK1(RTX, N, '0').bb)
339 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1(RTX, N, '0').rt_addr_diff_vec_flags)
340 #define X0CSELIB(RTX, N) (RTL_CHECK1(RTX, N, '0').rt_cselib)
341
342 #define XCWINT(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtwint)
343 #define XCINT(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtint)
344 #define XCUINT(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtuint)
345 #define XCSTR(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtstr)
346 #define XCEXP(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtx)
347 #define XCVEC(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtvec)
348 #define XCMODE(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rttype)
349 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtbit)
350 #define XCTREE(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rttree)
351 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1(RTX, N, C).bb)
352 #define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rt_addr_diff_vec_flags)
353 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rt_cselib)
354
355 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
356 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
357
358 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2(RTX, N, C1, C2).rtx)
359 \f
360 /* ACCESS MACROS for particular fields of insns. */
361
362 /* Determines whether X is an insn. */
363 #define INSN_P(X) (GET_RTX_CLASS (GET_CODE(X)) == 'i')
364
365 /* Holds a unique number for each insn.
366 These are not necessarily sequentially increasing. */
367 #define INSN_UID(INSN) XINT(INSN, 0)
368
369 /* Chain insns together in sequence. */
370 #define PREV_INSN(INSN) XEXP(INSN, 1)
371 #define NEXT_INSN(INSN) XEXP(INSN, 2)
372
373 /* The body of an insn. */
374 #define PATTERN(INSN) XEXP(INSN, 3)
375
376 /* Code number of instruction, from when it was recognized.
377 -1 means this instruction has not been recognized yet. */
378 #define INSN_CODE(INSN) XINT(INSN, 4)
379
380 /* Set up in flow.c; empty before then.
381 Holds a chain of INSN_LIST rtx's whose first operands point at
382 previous insns with direct data-flow connections to this one.
383 That means that those insns set variables whose next use is in this insn.
384 They are always in the same basic block as this insn. */
385 #define LOG_LINKS(INSN) XEXP(INSN, 5)
386
387 /* 1 if insn has been deleted. */
388 #define INSN_DELETED_P(INSN) ((INSN)->volatil)
389
390 /* 1 if insn is a call to a const function. */
391 #define CONST_CALL_P(INSN) ((INSN)->unchanging)
392
393 /* 1 if insn (assumed to be a CALL_INSN) is a sibling call. */
394 #define SIBLING_CALL_P(INSN) ((INSN)->jump)
395
396 /* 1 if insn is a branch that should not unconditionally execute its
397 delay slots, i.e., it is an annulled branch. */
398 #define INSN_ANNULLED_BRANCH_P(INSN) ((INSN)->unchanging)
399
400 /* 1 if insn is a dead code. Valid only for dead-code elimination phase. */
401 #define INSN_DEAD_CODE_P(INSN) ((INSN)->in_struct)
402
403 /* 1 if insn is in a delay slot and is from the target of the branch. If
404 the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
405 executed if the branch is taken. For annulled branches with this bit
406 clear, the insn should be executed only if the branch is not taken. */
407 #define INSN_FROM_TARGET_P(INSN) ((INSN)->in_struct)
408
409 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
410
411 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
412
413 /* Holds a list of notes on what this insn does to various REGs.
414 It is a chain of EXPR_LIST rtx's, where the second operand is the
415 chain pointer and the first operand is the REG being described.
416 The mode field of the EXPR_LIST contains not a real machine mode
417 but a value from enum reg_note. */
418
419 #define REG_NOTES(INSN) XEXP(INSN, 6)
420
421 /* Don't forget to change reg_note_name in rtl.c. */
422 enum reg_note
423 {
424 /* The value in REG dies in this insn (i.e., it is not needed past
425 this insn). If REG is set in this insn, the REG_DEAD note may,
426 but need not, be omitted. */
427 REG_DEAD = 1,
428
429 /* The REG is autoincremented or autodecremented. */
430 REG_INC,
431
432 /* Describes the insn as a whole; it says that the insn sets a register
433 to a constant value or to be equivalent to a memory address. If the
434 register is spilled to the stack then the constant value should be
435 substituted for it. The contents of the REG_EQUIV is the constant
436 value or memory address, which may be different from the source of
437 the SET although it has the same value. A REG_EQUIV note may also
438 appear on an insn which copies a register parameter to a pseudo-register,
439 if there is a memory address which could be used to hold that
440 pseudo-register throughout the function. */
441 REG_EQUIV,
442
443 /* Like REG_EQUIV except that the destination is only momentarily equal
444 to the specified rtx. Therefore, it cannot be used for substitution;
445 but it can be used for cse. */
446 REG_EQUAL,
447
448 /* The register set in this insn held 0 before the insn. The contents of
449 the note is the insn that stored the 0. If that insn is deleted or
450 patched to a NOTE, the REG_WAS_0 is inoperative. The REG_WAS_0 note
451 is actually an INSN_LIST, not an EXPR_LIST. */
452 REG_WAS_0,
453
454 /* This insn copies the return-value of a library call out of the hard reg
455 for return values. This note is actually an INSN_LIST and it points to
456 the first insn involved in setting up arguments for the call. flow.c
457 uses this to delete the entire library call when its result is dead. */
458 REG_RETVAL,
459
460 /* The inverse of REG_RETVAL: it goes on the first insn of the library call
461 and points at the one that has the REG_RETVAL. This note is also an
462 INSN_LIST. */
463 REG_LIBCALL,
464
465 /* The register is always nonnegative during the containing loop. This is
466 used in branches so that decrement and branch instructions terminating
467 on zero can be matched. There must be an insn pattern in the md file
468 named `decrement_and_branch_until_zero' or else this will never be added
469 to any instructions. */
470 REG_NONNEG,
471
472 /* There is no conflict *after this insn* between the register in the note
473 and the destination of this insn. */
474 REG_NO_CONFLICT,
475
476 /* Identifies a register set in this insn and never used. */
477 REG_UNUSED,
478
479 /* REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use CC0,
480 respectively. Normally, these are required to be consecutive insns, but
481 we permit putting a cc0-setting insn in the delay slot of a branch as
482 long as only one copy of the insn exists. In that case, these notes
483 point from one to the other to allow code generation to determine what
484 any require information and to properly update CC_STATUS. These notes
485 are INSN_LISTs. */
486 REG_CC_SETTER, REG_CC_USER,
487
488 /* Points to a CODE_LABEL. Used by non-JUMP_INSNs to say that the
489 CODE_LABEL contained in the REG_LABEL note is used by the insn.
490 This note is an INSN_LIST. */
491 REG_LABEL,
492
493 /* REG_DEP_ANTI and REG_DEP_OUTPUT are used in LOG_LINKS to represent
494 write-after-read and write-after-write dependencies respectively.
495 Data dependencies, which are the only type of LOG_LINK created by
496 flow, are represented by a 0 reg note kind. */
497 REG_DEP_ANTI, REG_DEP_OUTPUT,
498
499 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs when the flag
500 -fbranch-probabilities is given. It has an integer value. For jumps,
501 it is the probability that this is a taken branch. For calls, it is
502 the probability that this call won't return. */
503 REG_BR_PROB,
504
505 /* REG_EXEC_COUNT is attached to the first insn of each basic block, and
506 the first insn after each CALL_INSN. It indicates how many times this
507 block was executed. */
508 REG_EXEC_COUNT,
509
510 /* Attached to a call insn; indicates that the call is malloc-like and
511 that the pointer returned cannot alias anything else. */
512 REG_NOALIAS,
513
514 /* Used to optimize rtl generated by dynamic stack allocations for targets
515 where SETJMP_VIA_SAVE_AREA is true. */
516 REG_SAVE_AREA,
517
518 /* Attached to JUMP_INSNs only, it holds the branch prediction flags
519 computed by get_jump_flags() after dbr scheduling is complete. */
520 REG_BR_PRED,
521
522 /* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex
523 for DWARF to interpret what they imply. The attached rtx is used
524 instead of intuition. */
525 REG_FRAME_RELATED_EXPR,
526
527 /* Indicates that REG holds the exception context for the function.
528 This context is shared by inline functions, so the code to acquire
529 the real exception context is delayed until after inlining. */
530 REG_EH_CONTEXT,
531
532 /* Indicates what exception region an INSN belongs in. This is used to
533 indicate what region to which a call may throw. REGION 0 indicates
534 that a call cannot throw at all. REGION -1 indicates that it cannot
535 throw, nor will it execute a non-local goto. */
536 REG_EH_REGION,
537
538 /* Indicates that a call is actually a call to rethrow, and specifies the
539 rethrow symbol for the region the rethrow is targetting. This provides
540 a way to generate the non standard flow edges required for a rethrow. */
541 REG_EH_RETHROW,
542
543 /* Used by haifa-sched to save NOTE_INSN notes across scheduling. */
544 REG_SAVE_NOTE,
545
546 /* Indicates that this insn (which is part of the prologue) computes
547 a value which might not be used later, and if so it's OK to delete
548 the insn. Normally, deleting any insn in the prologue is an error.
549 At present the parameter is unused and set to (const_int 0). */
550 REG_MAYBE_DEAD,
551
552 /* Indicates that a call does not return. */
553 REG_NORETURN,
554
555 /* Indicates that an indirect jump is a non-local goto instead of a
556 computed goto. */
557 REG_NON_LOCAL_GOTO
558 };
559
560 /* The base value for branch probability notes. */
561 #define REG_BR_PROB_BASE 10000
562
563 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
564 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
565 #define PUT_REG_NOTE_KIND(LINK,KIND) PUT_MODE(LINK, (enum machine_mode) (KIND))
566
567 /* Names for REG_NOTE's in EXPR_LIST insn's. */
568
569 extern const char * const reg_note_name[];
570 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
571
572 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
573 USE and CLOBBER expressions.
574 USE expressions list the registers filled with arguments that
575 are passed to the function.
576 CLOBBER expressions document the registers explicitly clobbered
577 by this CALL_INSN.
578 Pseudo registers can not be mentioned in this list. */
579 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 7)
580
581 /* The label-number of a code-label. The assembler label
582 is made from `L' and the label-number printed in decimal.
583 Label numbers are unique in a compilation. */
584 #define CODE_LABEL_NUMBER(INSN) XINT(INSN, 5)
585
586 #define LINE_NUMBER NOTE
587
588 /* In a NOTE that is a line number, this is a string for the file name that the
589 line is in. We use the same field to record block numbers temporarily in
590 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
591 between ints and pointers if we use a different macro for the block number.)
592 The NOTE_INSN_RANGE_{START,END} and NOTE_INSN_LIVE notes record their
593 information as a rtx in the field. */
594
595 #define NOTE_SOURCE_FILE(INSN) XCSTR(INSN, 3, NOTE)
596 #define NOTE_BLOCK(INSN) XCTREE(INSN, 3, NOTE)
597 #define NOTE_EH_HANDLER(INSN) XCINT(INSN, 3, NOTE)
598 #define NOTE_RANGE_INFO(INSN) XCEXP(INSN, 3, NOTE)
599 #define NOTE_LIVE_INFO(INSN) XCEXP(INSN, 3, NOTE)
600 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF(INSN, 3, NOTE)
601 #define NOTE_EXPECTED_VALUE(INSN) XCEXP(INSN, 3, NOTE)
602
603 /* In a NOTE that is a line number, this is the line number.
604 Other kinds of NOTEs are identified by negative numbers here. */
605 #define NOTE_LINE_NUMBER(INSN) XCINT(INSN, 4, NOTE)
606
607 /* Nonzero if INSN is a note marking the beginning of a basic block. */
608 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
609 (GET_CODE (INSN) == NOTE \
610 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
611
612 /* Codes that appear in the NOTE_LINE_NUMBER field
613 for kinds of notes that are not line numbers.
614
615 Notice that we do not try to use zero here for any of
616 the special note codes because sometimes the source line
617 actually can be zero! This happens (for example) when we
618 are generating code for the per-translation-unit constructor
619 and destructor routines for some C++ translation unit.
620
621 If you should change any of the following values, or if you
622 should add a new value here, don't forget to change the
623 note_insn_name array in rtl.c. */
624
625 enum insn_note
626 {
627 /* Keep all of these numbers negative. Adjust as needed. */
628 NOTE_INSN_BIAS = -100,
629
630 /* This note is used to get rid of an insn
631 when it isn't safe to patch the insn out of the chain. */
632 NOTE_INSN_DELETED,
633
634 /* These are used to mark the beginning and end of a lexical block.
635 See NOTE_BLOCK, identify_blocks and reorder_blocks. */
636 NOTE_INSN_BLOCK_BEG,
637 NOTE_INSN_BLOCK_END,
638
639 /* These mark the extremes of a loop. */
640 NOTE_INSN_LOOP_BEG,
641 NOTE_INSN_LOOP_END,
642
643 /* Generated at the place in a loop that `continue' jumps to. */
644 NOTE_INSN_LOOP_CONT,
645 /* Generated at the start of a duplicated exit test. */
646 NOTE_INSN_LOOP_VTOP,
647
648 /* This kind of note is generated at the end of the function body,
649 just before the return insn or return label. In an optimizing
650 compilation it is deleted by the first jump optimization, after
651 enabling that optimizer to determine whether control can fall
652 off the end of the function body without a return statement. */
653 NOTE_INSN_FUNCTION_END,
654
655 /* This kind of note is generated just after each call to `setjmp',
656 and similar functions that can return twice. */
657 NOTE_INSN_SETJMP,
658
659 /* This marks the point immediately after the last prologue insn. */
660 NOTE_INSN_PROLOGUE_END,
661
662 /* This marks the point immediately prior to the first epilogue insn. */
663 NOTE_INSN_EPILOGUE_BEG,
664
665 /* Generated in place of user-declared labels when they are deleted. */
666 NOTE_INSN_DELETED_LABEL,
667
668 /* This note indicates the start of the real body of the function,
669 i.e. the point just after all of the parms have been moved into
670 their homes, etc. */
671 NOTE_INSN_FUNCTION_BEG,
672
673 /* These note where exception handling regions begin and end.
674 Uses NOTE_EH_HANDLER to identify the region in question. */
675 NOTE_INSN_EH_REGION_BEG,
676 NOTE_INSN_EH_REGION_END,
677
678 /* Generated whenever a duplicate line number note is output. For example,
679 one is output after the end of an inline function, in order to prevent
680 the line containing the inline call from being counted twice in gcov. */
681 NOTE_INSN_REPEATED_LINE_NUMBER,
682
683 /* Start/end of a live range region, where pseudos allocated on the stack
684 can be allocated to temporary registers. Uses NOTE_RANGE_INFO. */
685 NOTE_INSN_RANGE_BEG,
686 NOTE_INSN_RANGE_END,
687
688 /* Record which registers are currently live. Uses NOTE_LIVE_INFO. */
689 NOTE_INSN_LIVE,
690
691 /* Record the struct for the following basic block. Uses NOTE_BASIC_BLOCK. */
692 NOTE_INSN_BASIC_BLOCK,
693
694 /* Record the expected value of a register at a location. Uses
695 NOTE_EXPECTED_VALUE; stored as (eq (reg) (const_int)). */
696 NOTE_INSN_EXPECTED_VALUE,
697
698 NOTE_INSN_MAX
699 };
700
701 /* Names for NOTE insn's other than line numbers. */
702
703 extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS];
704 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
705 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
706
707 /* The name of a label, in case it corresponds to an explicit label
708 in the input source code. */
709 #define LABEL_NAME(RTX) XCSTR(RTX, 6, CODE_LABEL)
710
711 /* In jump.c, each label contains a count of the number
712 of LABEL_REFs that point at it, so unused labels can be deleted. */
713 #define LABEL_NUSES(RTX) XCINT(RTX, 3, CODE_LABEL)
714
715 /* Associate a name with a CODE_LABEL. */
716 #define LABEL_ALTERNATE_NAME(RTX) XCSTR(RTX, 7, CODE_LABEL)
717
718 /* The original regno this ADDRESSOF was built for. */
719 #define ADDRESSOF_REGNO(RTX) XCUINT(RTX, 1, ADDRESSOF)
720
721 /* The variable in the register we took the address of. */
722 #define ADDRESSOF_DECL(RTX) XCTREE(RTX, 2, ADDRESSOF)
723
724 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
725 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
726 be decremented and possibly the label can be deleted. */
727 #define JUMP_LABEL(INSN) XCEXP(INSN, 7, JUMP_INSN)
728
729 /* Once basic blocks are found in flow.c,
730 each CODE_LABEL starts a chain that goes through
731 all the LABEL_REFs that jump to that label.
732 The chain eventually winds up at the CODE_LABEL: it is circular. */
733 #define LABEL_REFS(LABEL) XCEXP(LABEL, 4, CODE_LABEL)
734 \f
735 /* This is the field in the LABEL_REF through which the circular chain
736 of references to a particular label is linked.
737 This chain is set up in flow.c. */
738
739 #define LABEL_NEXTREF(REF) XCEXP(REF, 1, LABEL_REF)
740
741 /* Once basic blocks are found in flow.c,
742 Each LABEL_REF points to its containing instruction with this field. */
743
744 #define CONTAINING_INSN(RTX) XCEXP(RTX, 2, LABEL_REF)
745
746 /* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
747 the number the register originally had; for a pseudo register turned into
748 a hard reg this will hold the old pseudo register number. */
749
750 #define REGNO(RTX) XCUINT(RTX, 0, REG)
751 #define ORIGINAL_REGNO(RTX) X0UINT(RTX, 1)
752
753 /* For a REG rtx, REG_FUNCTION_VALUE_P is nonzero if the reg
754 is the current function's return value. */
755
756 #define REG_FUNCTION_VALUE_P(RTX) ((RTX)->integrated)
757
758 /* 1 in a REG rtx if it corresponds to a variable declared by the user. */
759 #define REG_USERVAR_P(RTX) ((RTX)->volatil)
760
761 /* 1 in a REG rtx if the register is a pointer. */
762 #define REG_POINTER(RTX) ((RTX)->frame_related)
763
764 /* 1 if the given register REG corresponds to a hard register. */
765 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
766
767 /* 1 if the given register number REG_NO corresponds to a hard register. */
768 #define HARD_REGISTER_NUM_P(REG_NO) (REG_NO < FIRST_PSEUDO_REGISTER)
769
770 /* For a CONST_INT rtx, INTVAL extracts the integer. */
771
772 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
773
774 /* For a CONST_DOUBLE:
775 The usual two ints that hold the value.
776 For a DImode, that is all there are;
777 and CONST_DOUBLE_LOW is the low-order word and ..._HIGH the high-order.
778 For a float, the number of ints varies,
779 and CONST_DOUBLE_LOW is the one that should come first *in memory*.
780 So use &CONST_DOUBLE_LOW(r) as the address of an array of ints. */
781 #define CONST_DOUBLE_LOW(r) XCWINT (r, 2, CONST_DOUBLE)
782 #define CONST_DOUBLE_HIGH(r) XCWINT (r, 3, CONST_DOUBLE)
783
784 /* Link for chain of all CONST_DOUBLEs in use in current function. */
785 #define CONST_DOUBLE_CHAIN(r) XCEXP (r, 1, CONST_DOUBLE)
786 /* The MEM which represents this CONST_DOUBLE's value in memory,
787 or const0_rtx if no MEM has been made for it yet,
788 or cc0_rtx if it is not on the chain. */
789 #define CONST_DOUBLE_MEM(r) XCEXP (r, 0, CONST_DOUBLE)
790
791 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
792 SUBREG_WORD extracts the word-number. */
793
794 #define SUBREG_REG(RTX) XCEXP(RTX, 0, SUBREG)
795 #define SUBREG_WORD(RTX) XCUINT(RTX, 1, SUBREG)
796
797 /* 1 if the REG contained in SUBREG_REG is already known to be
798 sign- or zero-extended from the mode of the SUBREG to the mode of
799 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
800 extension.
801
802 When used as a LHS, is means that this extension must be done
803 when assigning to SUBREG_REG. */
804
805 #define SUBREG_PROMOTED_VAR_P(RTX) ((RTX)->in_struct)
806 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) ((RTX)->unchanging)
807
808 /* Access various components of an ASM_OPERANDS rtx. */
809
810 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR ((RTX), 0, ASM_OPERANDS)
811 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR ((RTX), 1, ASM_OPERANDS)
812 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT ((RTX), 2, ASM_OPERANDS)
813 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC ((RTX), 3, ASM_OPERANDS)
814 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC ((RTX), 4, ASM_OPERANDS)
815 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP ((RTX), 3, (N), ASM_OPERANDS)
816 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN ((RTX), 3, ASM_OPERANDS)
817 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
818 XCVECEXP ((RTX), 4, (N), ASM_OPERANDS)
819 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
820 XSTR (XCVECEXP ((RTX), 4, (N), ASM_OPERANDS), 0)
821 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
822 GET_MODE (XCVECEXP ((RTX), 4, (N), ASM_OPERANDS))
823 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR ((RTX), 5, ASM_OPERANDS)
824 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT ((RTX), 6, ASM_OPERANDS)
825
826 /* For a MEM rtx, 1 if it's a volatile reference.
827 Also in an ASM_OPERANDS rtx. */
828 #define MEM_VOLATILE_P(RTX) ((RTX)->volatil)
829
830 /* For a MEM rtx, 1 if it refers to an aggregate, either to the
831 aggregate itself of to a field of the aggregate. If zero, RTX may
832 or may not be such a reference. */
833 #define MEM_IN_STRUCT_P(RTX) ((RTX)->in_struct)
834
835 /* For a MEM rtx, 1 if it refers to a scalar. If zero, RTX may or may
836 not refer to a scalar.*/
837 #define MEM_SCALAR_P(RTX) ((RTX)->frame_related)
838
839 /* If VAL is non-zero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
840 RTX. Otherwise, vice versa. Use this macro only when you are
841 *sure* that you know that the MEM is in a structure, or is a
842 scalar. VAL is evaluated only once. */
843 #define MEM_SET_IN_STRUCT_P(RTX, VAL) do { \
844 if (VAL) \
845 { \
846 MEM_IN_STRUCT_P (RTX) = 1; \
847 MEM_SCALAR_P (RTX) = 0; \
848 } \
849 else \
850 { \
851 MEM_IN_STRUCT_P (RTX) = 0; \
852 MEM_SCALAR_P (RTX) = 1; \
853 } \
854 } while (0)
855
856 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
857 set, and may alias anything. Otherwise, the MEM can only alias
858 MEMs in the same alias set. This value is set in a
859 language-dependent manner in the front-end, and should not be
860 altered in the back-end. These set numbers are tested for zero,
861 and compared for equality; they have no other significance. In
862 some front-ends, these numbers may correspond in some way to types,
863 or other language-level entities, but they need not, and the
864 back-end makes no such assumptions. */
865 #define MEM_ALIAS_SET(RTX) XCWINT(RTX, 1, MEM)
866
867 /* Copy the attributes that apply to memory locations from RHS to LHS. */
868 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
869 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
870 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
871 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
872 MEM_ALIAS_SET (LHS) = MEM_ALIAS_SET (RHS), \
873 RTX_UNCHANGING_P (LHS) = RTX_UNCHANGING_P (RHS))
874
875 /* For a LABEL_REF, 1 means that this reference is to a label outside the
876 loop containing the reference. */
877 #define LABEL_OUTSIDE_LOOP_P(RTX) ((RTX)->in_struct)
878
879 /* For a LABEL_REF, 1 means it is for a nonlocal label. */
880 /* Likewise in an EXPR_LIST for a REG_LABEL note. */
881 #define LABEL_REF_NONLOCAL_P(RTX) ((RTX)->volatil)
882
883 /* For a CODE_LABEL, 1 means always consider this label to be needed. */
884 #define LABEL_PRESERVE_P(RTX) ((RTX)->in_struct)
885
886 /* For a REG, 1 means the register is used only in an exit test of a loop. */
887 #define REG_LOOP_TEST_P(RTX) ((RTX)->in_struct)
888
889 /* During sched, for an insn, 1 means that the insn must be scheduled together
890 with the preceding insn. */
891 #define SCHED_GROUP_P(INSN) ((INSN)->in_struct)
892
893 /* During sched, for the LOG_LINKS of an insn, these cache the adjusted
894 cost of the dependence link. The cost of executing an instruction
895 may vary based on how the results are used. LINK_COST_ZERO is 1 when
896 the cost through the link varies and is unchanged (i.e., the link has
897 zero additional cost). LINK_COST_FREE is 1 when the cost through the
898 link is zero (i.e., the link makes the cost free). In other cases,
899 the adjustment to the cost is recomputed each time it is needed. */
900 #define LINK_COST_ZERO(X) ((X)->jump)
901 #define LINK_COST_FREE(X) ((X)->call)
902
903 /* For a SET rtx, SET_DEST is the place that is set
904 and SET_SRC is the value it is set to. */
905 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
906 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
907
908 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
909 #define TRAP_CONDITION(RTX) XCEXP(RTX, 0, TRAP_IF)
910 #define TRAP_CODE(RTX) XCEXP(RTX, 1, TRAP_IF)
911
912 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
913 conditionally executing the code on, COND_EXEC_CODE is the code
914 to execute if the condition is true. */
915 #define COND_EXEC_TEST(RTX) XCEXP(RTX, 0, COND_EXEC)
916 #define COND_EXEC_CODE(RTX) XCEXP(RTX, 1, COND_EXEC)
917
918 /* 1 in a SYMBOL_REF if it addresses this function's constants pool. */
919 #define CONSTANT_POOL_ADDRESS_P(RTX) ((RTX)->unchanging)
920
921 /* 1 in a SYMBOL_REF if it addresses this function's string constant pool. */
922 #define STRING_POOL_ADDRESS_P(RTX) ((RTX)->frame_related)
923
924 /* Flag in a SYMBOL_REF for machine-specific purposes. */
925 #define SYMBOL_REF_FLAG(RTX) ((RTX)->volatil)
926
927 /* 1 means a SYMBOL_REF has been the library function in emit_library_call. */
928 #define SYMBOL_REF_USED(RTX) ((RTX)->used)
929
930 /* Define a macro to look for REG_INC notes,
931 but save time on machines where they never exist. */
932
933 /* Don't continue this line--convex cc version 4.1 would lose. */
934 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
935 #define FIND_REG_INC_NOTE(insn, reg) (find_reg_note ((insn), REG_INC, (reg)))
936 #else
937 #define FIND_REG_INC_NOTE(insn, reg) 0
938 #endif
939
940 /* Indicate whether the machine has any sort of auto increment addressing.
941 If not, we can avoid checking for REG_INC notes. */
942
943 /* Don't continue this line--convex cc version 4.1 would lose. */
944 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
945 #define AUTO_INC_DEC
946 #endif
947
948 #ifndef HAVE_PRE_INCREMENT
949 #define HAVE_PRE_INCREMENT 0
950 #endif
951
952 #ifndef HAVE_PRE_DECREMENT
953 #define HAVE_PRE_DECREMENT 0
954 #endif
955
956 #ifndef HAVE_POST_INCREMENT
957 #define HAVE_POST_INCREMENT 0
958 #endif
959
960 #ifndef HAVE_POST_DECREMENT
961 #define HAVE_POST_DECREMENT 0
962 #endif
963
964 #ifndef HAVE_POST_MODIFY_DISP
965 #define HAVE_POST_MODIFY_DISP 0
966 #endif
967
968 #ifndef HAVE_POST_MODIFY_REG
969 #define HAVE_POST_MODIFY_REG 0
970 #endif
971
972 #ifndef HAVE_PRE_MODIFY_DISP
973 #define HAVE_PRE_MODIFY_DISP 0
974 #endif
975
976 #ifndef HAVE_PRE_MODIFY_REG
977 #define HAVE_PRE_MODIFY_REG 0
978 #endif
979
980
981 /* Some architectures do not have complete pre/post increment/decrement
982 instruction sets, or only move some modes efficiently. These macros
983 allow us to tune autoincrement generation. */
984
985 #ifndef USE_LOAD_POST_INCREMENT
986 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
987 #endif
988
989 #ifndef USE_LOAD_POST_DECREMENT
990 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
991 #endif
992
993 #ifndef USE_LOAD_PRE_INCREMENT
994 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
995 #endif
996
997 #ifndef USE_LOAD_PRE_DECREMENT
998 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
999 #endif
1000
1001 #ifndef USE_STORE_POST_INCREMENT
1002 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1003 #endif
1004
1005 #ifndef USE_STORE_POST_DECREMENT
1006 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1007 #endif
1008
1009 #ifndef USE_STORE_PRE_INCREMENT
1010 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1011 #endif
1012
1013 #ifndef USE_STORE_PRE_DECREMENT
1014 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1015 #endif
1016
1017
1018 /* Accessors for RANGE_INFO. */
1019 /* For RANGE_{START,END} notes return the RANGE_START note. */
1020 #define RANGE_INFO_NOTE_START(INSN) XCEXP (INSN, 0, RANGE_INFO)
1021
1022 /* For RANGE_{START,END} notes return the RANGE_START note. */
1023 #define RANGE_INFO_NOTE_END(INSN) XCEXP (INSN, 1, RANGE_INFO)
1024
1025 /* For RANGE_{START,END} notes, return the vector containing the registers used
1026 in the range. */
1027 #define RANGE_INFO_REGS(INSN) XCVEC (INSN, 2, RANGE_INFO)
1028 #define RANGE_INFO_REGS_REG(INSN, N) XCVECEXP (INSN, 2, N, RANGE_INFO)
1029 #define RANGE_INFO_NUM_REGS(INSN) XCVECLEN (INSN, 2, RANGE_INFO)
1030
1031 /* For RANGE_{START,END} notes, the number of calls within the range. */
1032 #define RANGE_INFO_NCALLS(INSN) XCINT (INSN, 3, RANGE_INFO)
1033
1034 /* For RANGE_{START,END} notes, the number of insns within the range. */
1035 #define RANGE_INFO_NINSNS(INSN) XCINT (INSN, 4, RANGE_INFO)
1036
1037 /* For RANGE_{START,END} notes, a unique # to identify this range. */
1038 #define RANGE_INFO_UNIQUE(INSN) XCINT (INSN, 5, RANGE_INFO)
1039
1040 /* For RANGE_{START,END} notes, the basic block # the range starts with. */
1041 #define RANGE_INFO_BB_START(INSN) XCINT (INSN, 6, RANGE_INFO)
1042
1043 /* For RANGE_{START,END} notes, the basic block # the range ends with. */
1044 #define RANGE_INFO_BB_END(INSN) XCINT (INSN, 7, RANGE_INFO)
1045
1046 /* For RANGE_{START,END} notes, the loop depth the range is in. */
1047 #define RANGE_INFO_LOOP_DEPTH(INSN) XCINT (INSN, 8, RANGE_INFO)
1048
1049 /* For RANGE_{START,END} notes, the bitmap of live registers at the start
1050 of the range. */
1051 #define RANGE_INFO_LIVE_START(INSN) XCBITMAP (INSN, 9, RANGE_INFO)
1052
1053 /* For RANGE_{START,END} notes, the bitmap of live registers at the end
1054 of the range. */
1055 #define RANGE_INFO_LIVE_END(INSN) XCBITMAP (INSN, 10, RANGE_INFO)
1056
1057 /* For RANGE_START notes, the marker # of the start of the range. */
1058 #define RANGE_INFO_MARKER_START(INSN) XCINT (INSN, 11, RANGE_INFO)
1059
1060 /* For RANGE_START notes, the marker # of the end of the range. */
1061 #define RANGE_INFO_MARKER_END(INSN) XCINT (INSN, 12, RANGE_INFO)
1062
1063 /* Original pseudo register # for a live range note. */
1064 #define RANGE_REG_PSEUDO(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 0, REG)
1065
1066 /* Pseudo register # original register is copied into or -1. */
1067 #define RANGE_REG_COPY(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 1, REG)
1068
1069 /* How many times a register in a live range note was referenced. */
1070 #define RANGE_REG_REFS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 2)
1071
1072 /* How many times a register in a live range note was set. */
1073 #define RANGE_REG_SETS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 3)
1074
1075 /* How many times a register in a live range note died. */
1076 #define RANGE_REG_DEATHS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 4)
1077
1078 /* Whether the original value is needed to be copied into the range register at
1079 the start of the range. */
1080 #define RANGE_REG_COPY_FLAGS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 5)
1081
1082 /* # of insns the register copy is live over. */
1083 #define RANGE_REG_LIVE_LENGTH(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 6)
1084
1085 /* # of calls the register copy is live over. */
1086 #define RANGE_REG_N_CALLS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 7)
1087
1088 /* DECL_NODE pointer of the declaration if the register is a user defined
1089 variable. */
1090 #define RANGE_REG_SYMBOL_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 8)
1091
1092 /* BLOCK_NODE pointer to the block the variable is declared in if the
1093 register is a user defined variable. */
1094 #define RANGE_REG_BLOCK_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 9)
1095
1096 /* EXPR_LIST of the distinct ranges a variable is in. */
1097 #define RANGE_VAR_LIST(INSN) (XEXP (INSN, 0))
1098
1099 /* Block a variable is declared in. */
1100 #define RANGE_VAR_BLOCK(INSN) (XTREE (INSN, 1))
1101
1102 /* # of distinct ranges a variable is in. */
1103 #define RANGE_VAR_NUM(INSN) (XINT (INSN, 2))
1104
1105 /* For a NOTE_INSN_LIVE note, the registers which are currently live. */
1106 #define RANGE_LIVE_BITMAP(INSN) (XBITMAP (INSN, 0))
1107
1108 /* For a NOTE_INSN_LIVE note, the original basic block number. */
1109 #define RANGE_LIVE_ORIG_BLOCK(INSN) (XINT (INSN, 1))
1110
1111 /* Determine if the insn is a PHI node. */
1112 #define PHI_NODE_P(X) \
1113 (X && GET_CODE (X) == INSN \
1114 && GET_CODE (PATTERN (X)) == SET \
1115 && GET_CODE (SET_SRC (PATTERN (X))) == PHI)
1116 \f
1117 /* Nonzero if we need to distinguish between the return value of this function
1118 and the return value of a function called by this function. This helps
1119 integrate.c.
1120 This is 1 until after the rtl generation pass. */
1121 extern int rtx_equal_function_value_matters;
1122
1123 /* Nonzero when we are generating CONCATs. */
1124 extern int generating_concat_p;
1125
1126 /* Generally useful functions. */
1127
1128 /* The following functions accept a wide integer argument. Rather than
1129 having to cast on every function call, we use a macro instead, that is
1130 defined here and in tree.h. */
1131
1132 #ifndef exact_log2
1133 #define exact_log2(N) exact_log2_wide ((unsigned HOST_WIDE_INT) (N))
1134 #define floor_log2(N) floor_log2_wide ((unsigned HOST_WIDE_INT) (N))
1135 #endif
1136 extern int exact_log2_wide PARAMS ((unsigned HOST_WIDE_INT));
1137 extern int floor_log2_wide PARAMS ((unsigned HOST_WIDE_INT));
1138
1139 /* In expmed.c */
1140 extern int ceil_log2 PARAMS ((unsigned HOST_WIDE_INT));
1141
1142 #define plus_constant(X,C) plus_constant_wide (X, (HOST_WIDE_INT) (C))
1143
1144 #define plus_constant_for_output(X,C) \
1145 plus_constant_for_output_wide (X, (HOST_WIDE_INT) (C))
1146
1147 /* In explow.c */
1148 extern void set_stack_check_libfunc PARAMS ((rtx));
1149 extern HOST_WIDE_INT trunc_int_for_mode PARAMS ((HOST_WIDE_INT,
1150 enum machine_mode));
1151 extern rtx plus_constant_wide PARAMS ((rtx, HOST_WIDE_INT));
1152 extern rtx plus_constant_for_output_wide PARAMS ((rtx, HOST_WIDE_INT));
1153 extern void optimize_save_area_alloca PARAMS ((rtx));
1154
1155 /* In emit-rtl.c */
1156 extern rtx gen_rtx PARAMS ((enum rtx_code,
1157 enum machine_mode, ...));
1158 extern rtvec gen_rtvec PARAMS ((int, ...));
1159
1160 /* In other files */
1161 extern char *permalloc PARAMS ((int));
1162 extern rtx rtx_alloc PARAMS ((RTX_CODE));
1163 extern rtvec rtvec_alloc PARAMS ((int));
1164 extern rtx copy_insn_1 PARAMS ((rtx));
1165 extern rtx copy_insn PARAMS ((rtx));
1166
1167 /* In rtl.c */
1168 extern rtx copy_rtx PARAMS ((rtx));
1169
1170 /* In emit-rtl.c */
1171 extern rtx copy_rtx_if_shared PARAMS ((rtx));
1172
1173 /* In rtl.c */
1174 extern rtx copy_most_rtx PARAMS ((rtx, rtx));
1175 extern rtx shallow_copy_rtx PARAMS ((rtx));
1176 extern int rtx_equal_p PARAMS ((rtx, rtx));
1177
1178 /* In emit-rtl.c */
1179 extern rtvec gen_rtvec_v PARAMS ((int, rtx *));
1180 extern rtx gen_reg_rtx PARAMS ((enum machine_mode));
1181 extern rtx gen_label_rtx PARAMS ((void));
1182 extern rtx gen_lowpart_common PARAMS ((enum machine_mode, rtx));
1183 extern rtx gen_lowpart PARAMS ((enum machine_mode, rtx));
1184
1185 /* In cse.c */
1186 extern rtx gen_lowpart_if_possible PARAMS ((enum machine_mode, rtx));
1187
1188 /* In emit-rtl.c */
1189 extern rtx gen_highpart PARAMS ((enum machine_mode, rtx));
1190 extern rtx gen_realpart PARAMS ((enum machine_mode, rtx));
1191 extern rtx gen_imagpart PARAMS ((enum machine_mode, rtx));
1192 extern rtx operand_subword PARAMS ((rtx, unsigned int, int,
1193 enum machine_mode));
1194
1195 /* In emit-rtl.c */
1196 extern rtx operand_subword_force PARAMS ((rtx, unsigned int,
1197 enum machine_mode));
1198 extern int subreg_lowpart_p PARAMS ((rtx));
1199 extern rtx make_safe_from PARAMS ((rtx, rtx));
1200 extern rtx convert_memory_address PARAMS ((enum machine_mode, rtx));
1201 extern rtx memory_address PARAMS ((enum machine_mode, rtx));
1202 extern rtx get_insns PARAMS ((void));
1203 extern const char *get_insn_name PARAMS ((int));
1204 extern rtx get_last_insn PARAMS ((void));
1205 extern rtx get_last_insn_anywhere PARAMS ((void));
1206 extern void start_sequence PARAMS ((void));
1207 extern void push_to_sequence PARAMS ((rtx));
1208 extern void end_sequence PARAMS ((void));
1209 extern void push_to_full_sequence PARAMS ((rtx, rtx));
1210 extern void end_full_sequence PARAMS ((rtx*, rtx*));
1211 extern rtx gen_sequence PARAMS ((void));
1212
1213 /* In varasm.c */
1214 extern rtx immed_double_const PARAMS ((HOST_WIDE_INT, HOST_WIDE_INT, enum machine_mode));
1215 extern rtx force_const_mem PARAMS ((enum machine_mode, rtx));
1216
1217 /* In explow.c */
1218 extern rtx force_reg PARAMS ((enum machine_mode, rtx));
1219
1220 /* In varasm.c */
1221 extern rtx get_pool_constant PARAMS ((rtx));
1222 extern enum machine_mode get_pool_mode PARAMS ((rtx));
1223 extern rtx get_pool_constant_for_function PARAMS ((struct function *, rtx));
1224 extern enum machine_mode get_pool_mode_for_function PARAMS ((struct function *, rtx));
1225 extern int get_pool_offset PARAMS ((rtx));
1226 extern rtx simplify_subtraction PARAMS ((rtx));
1227
1228 /* In function.c */
1229 extern rtx assign_stack_local PARAMS ((enum machine_mode,
1230 HOST_WIDE_INT, int));
1231 extern rtx assign_stack_temp PARAMS ((enum machine_mode,
1232 HOST_WIDE_INT, int));
1233 extern rtx assign_temp PARAMS ((union tree_node *,
1234 int, int, int));
1235 /* In expr.c */
1236 extern rtx protect_from_queue PARAMS ((rtx, int));
1237 extern void emit_queue PARAMS ((void));
1238 extern rtx emit_move_insn PARAMS ((rtx, rtx));
1239
1240 /* In emit-rtl.c */
1241 extern rtx emit_insn_before PARAMS ((rtx, rtx));
1242 extern rtx emit_jump_insn_before PARAMS ((rtx, rtx));
1243 extern rtx emit_call_insn_before PARAMS ((rtx, rtx));
1244 extern rtx emit_barrier_before PARAMS ((rtx));
1245 extern rtx emit_label_before PARAMS ((rtx, rtx));
1246 extern rtx emit_note_before PARAMS ((int, rtx));
1247 extern rtx emit_insn_after PARAMS ((rtx, rtx));
1248 extern rtx emit_jump_insn_after PARAMS ((rtx, rtx));
1249 extern rtx emit_barrier_after PARAMS ((rtx));
1250 extern rtx emit_label_after PARAMS ((rtx, rtx));
1251 extern rtx emit_note_after PARAMS ((int, rtx));
1252 extern rtx emit_line_note_after PARAMS ((const char *, int, rtx));
1253 extern rtx emit_insn PARAMS ((rtx));
1254 extern rtx emit_insns PARAMS ((rtx));
1255 extern rtx emit_insns_before PARAMS ((rtx, rtx));
1256 extern rtx emit_insns_after PARAMS ((rtx, rtx));
1257 extern rtx emit_jump_insn PARAMS ((rtx));
1258 extern rtx emit_call_insn PARAMS ((rtx));
1259 extern rtx emit_label PARAMS ((rtx));
1260 extern rtx emit_barrier PARAMS ((void));
1261 extern rtx emit_line_note PARAMS ((const char *, int));
1262 extern rtx emit_note PARAMS ((const char *, int));
1263 extern rtx emit_line_note_force PARAMS ((const char *, int));
1264 extern rtx make_insn_raw PARAMS ((rtx));
1265 extern rtx previous_insn PARAMS ((rtx));
1266 extern rtx next_insn PARAMS ((rtx));
1267 extern rtx prev_nonnote_insn PARAMS ((rtx));
1268 extern rtx next_nonnote_insn PARAMS ((rtx));
1269 extern rtx prev_real_insn PARAMS ((rtx));
1270 extern rtx next_real_insn PARAMS ((rtx));
1271 extern rtx prev_active_insn PARAMS ((rtx));
1272 extern rtx next_active_insn PARAMS ((rtx));
1273 extern int active_insn_p PARAMS ((rtx));
1274 extern rtx prev_label PARAMS ((rtx));
1275 extern rtx next_label PARAMS ((rtx));
1276 extern rtx next_cc0_user PARAMS ((rtx));
1277 extern rtx prev_cc0_setter PARAMS ((rtx));
1278
1279 /* In jump.c */
1280 extern rtx next_nondeleted_insn PARAMS ((rtx));
1281 extern enum rtx_code reverse_condition PARAMS ((enum rtx_code));
1282 extern enum rtx_code reverse_condition_maybe_unordered PARAMS ((enum rtx_code));
1283 extern enum rtx_code swap_condition PARAMS ((enum rtx_code));
1284 extern enum rtx_code unsigned_condition PARAMS ((enum rtx_code));
1285 extern enum rtx_code signed_condition PARAMS ((enum rtx_code));
1286 extern void mark_jump_label PARAMS ((rtx, rtx, int, int));
1287
1288 /* In reload.c */
1289 extern rtx find_equiv_reg PARAMS ((rtx, rtx, enum reg_class, int, short *, int, enum machine_mode));
1290
1291 /* In jump.c */
1292 extern rtx squeeze_notes PARAMS ((rtx, rtx));
1293 extern rtx delete_insn PARAMS ((rtx));
1294 extern void delete_jump PARAMS ((rtx));
1295 extern void delete_barrier PARAMS ((rtx));
1296 extern rtx get_label_before PARAMS ((rtx));
1297 extern rtx get_label_after PARAMS ((rtx));
1298 extern rtx follow_jumps PARAMS ((rtx));
1299
1300 /* In recog.c */
1301 extern rtx adj_offsettable_operand PARAMS ((rtx, int));
1302
1303 /* In emit-rtl.c */
1304 extern rtx try_split PARAMS ((rtx, rtx, int));
1305
1306 /* In unknown file */
1307 extern rtx split_insns PARAMS ((rtx, rtx));
1308
1309 /* In simplify-rtx.c */
1310 extern rtx simplify_unary_operation PARAMS ((enum rtx_code,
1311 enum machine_mode, rtx,
1312 enum machine_mode));
1313 extern rtx simplify_binary_operation PARAMS ((enum rtx_code,
1314 enum machine_mode, rtx,
1315 rtx));
1316 extern rtx simplify_ternary_operation PARAMS ((enum rtx_code,
1317 enum machine_mode,
1318 enum machine_mode, rtx, rtx,
1319 rtx));
1320 extern rtx simplify_relational_operation PARAMS ((enum rtx_code,
1321 enum machine_mode, rtx,
1322 rtx));
1323 extern rtx simplify_gen_binary PARAMS ((enum rtx_code,
1324 enum machine_mode,
1325 rtx, rtx));
1326 extern rtx simplify_gen_unary PARAMS ((enum rtx_code,
1327 enum machine_mode, rtx,
1328 enum machine_mode));
1329 extern rtx simplify_gen_ternary PARAMS ((enum rtx_code,
1330 enum machine_mode,
1331 enum machine_mode,
1332 rtx, rtx, rtx));
1333 extern rtx simplify_gen_relational PARAMS ((enum rtx_code,
1334 enum machine_mode,
1335 rtx, rtx));
1336 extern rtx simplify_replace_rtx PARAMS ((rtx, rtx, rtx));
1337 extern rtx simplify_rtx PARAMS ((rtx));
1338
1339 /* In optabs.c */
1340 extern rtx gen_move_insn PARAMS ((rtx, rtx));
1341
1342 extern rtx gen_jump PARAMS ((rtx));
1343 extern rtx gen_beq PARAMS ((rtx));
1344 extern rtx gen_bge PARAMS ((rtx));
1345 extern rtx gen_ble PARAMS ((rtx));
1346
1347 /* In function.c */
1348 extern rtx gen_mem_addressof PARAMS ((rtx, union tree_node *));
1349
1350 /* In explow.c */
1351 extern rtx eliminate_constant_term PARAMS ((rtx, rtx *));
1352
1353 /* In optabs.c */
1354 extern rtx expand_complex_abs PARAMS ((enum machine_mode, rtx, rtx,
1355 int));
1356
1357 /* In regclass.c */
1358 extern enum machine_mode choose_hard_reg_mode PARAMS ((unsigned int,
1359 unsigned int));
1360
1361 /* In emit-rtl.c */
1362 extern void set_unique_reg_note PARAMS ((rtx, enum reg_note, rtx));
1363
1364 /* Functions in rtlanal.c */
1365
1366 /* Single set is implemented as macro for performance reasons. */
1367 #define single_set(I) (INSN_P (I) \
1368 ? (GET_CODE (PATTERN (I)) == SET \
1369 ? PATTERN (I) : single_set_1 (I)) \
1370 : NULL_RTX)
1371 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1372
1373 extern int rtx_addr_can_trap_p PARAMS ((rtx));
1374 extern int rtx_unstable_p PARAMS ((rtx));
1375 extern int rtx_varies_p PARAMS ((rtx, int));
1376 extern int rtx_addr_varies_p PARAMS ((rtx, int));
1377 extern HOST_WIDE_INT get_integer_term PARAMS ((rtx));
1378 extern rtx get_related_value PARAMS ((rtx));
1379 extern int reg_mentioned_p PARAMS ((rtx, rtx));
1380 extern int count_occurrences PARAMS ((rtx, rtx, int));
1381 extern int reg_referenced_p PARAMS ((rtx, rtx));
1382 extern int reg_used_between_p PARAMS ((rtx, rtx, rtx));
1383 extern int reg_referenced_between_p PARAMS ((rtx, rtx, rtx));
1384 extern int reg_set_between_p PARAMS ((rtx, rtx, rtx));
1385 extern int regs_set_between_p PARAMS ((rtx, rtx, rtx));
1386 extern int modified_between_p PARAMS ((rtx, rtx, rtx));
1387 extern int no_labels_between_p PARAMS ((rtx, rtx));
1388 extern int no_jumps_between_p PARAMS ((rtx, rtx));
1389 extern int modified_in_p PARAMS ((rtx, rtx));
1390 extern int insn_dependent_p PARAMS ((rtx, rtx));
1391 extern int reg_set_p PARAMS ((rtx, rtx));
1392 extern rtx single_set_2 PARAMS ((rtx, rtx));
1393 extern int multiple_sets PARAMS ((rtx));
1394 extern rtx find_last_value PARAMS ((rtx, rtx *, rtx, int));
1395 extern int refers_to_regno_p PARAMS ((unsigned int, unsigned int,
1396 rtx, rtx *));
1397 extern int reg_overlap_mentioned_p PARAMS ((rtx, rtx));
1398 extern rtx set_of PARAMS ((rtx, rtx));
1399 extern void note_stores PARAMS ((rtx,
1400 void (*) (rtx, rtx, void *),
1401 void *));
1402 extern void note_uses PARAMS ((rtx *,
1403 void (*) (rtx *, void *),
1404 void *));
1405 extern rtx reg_set_last PARAMS ((rtx, rtx));
1406 extern int dead_or_set_p PARAMS ((rtx, rtx));
1407 extern int dead_or_set_regno_p PARAMS ((rtx, unsigned int));
1408 extern rtx find_reg_note PARAMS ((rtx, enum reg_note, rtx));
1409 extern rtx find_regno_note PARAMS ((rtx, enum reg_note,
1410 unsigned int));
1411 extern rtx find_reg_equal_equiv_note PARAMS ((rtx));
1412 extern int find_reg_fusage PARAMS ((rtx, enum rtx_code, rtx));
1413 extern int find_regno_fusage PARAMS ((rtx, enum rtx_code,
1414 unsigned int));
1415 extern void remove_note PARAMS ((rtx, rtx));
1416 extern int side_effects_p PARAMS ((rtx));
1417 extern int volatile_refs_p PARAMS ((rtx));
1418 extern int volatile_insn_p PARAMS ((rtx));
1419 extern int may_trap_p PARAMS ((rtx));
1420 extern int inequality_comparisons_p PARAMS ((rtx));
1421 extern rtx replace_rtx PARAMS ((rtx, rtx, rtx));
1422 extern rtx replace_regs PARAMS ((rtx, rtx *, unsigned int,
1423 int));
1424 extern int computed_jump_p PARAMS ((rtx));
1425 typedef int (*rtx_function) PARAMS ((rtx *, void *));
1426 extern int for_each_rtx PARAMS ((rtx *, rtx_function, void *));
1427 extern rtx regno_use_in PARAMS ((unsigned int, rtx));
1428 extern int auto_inc_p PARAMS ((rtx));
1429 extern void remove_node_from_expr_list PARAMS ((rtx, rtx *));
1430 extern int insns_safe_to_move_p PARAMS ((rtx, rtx, rtx *));
1431 extern int loc_mentioned_in_p PARAMS ((rtx *, rtx));
1432
1433 /* flow.c */
1434
1435 extern rtx find_use_as_address PARAMS ((rtx, rtx, HOST_WIDE_INT));
1436 void init_EXPR_INSN_LIST_cache PARAMS ((void));
1437 void free_EXPR_LIST_list PARAMS ((rtx *));
1438 void free_INSN_LIST_list PARAMS ((rtx *));
1439 void free_EXPR_LIST_node PARAMS ((rtx));
1440 void free_INSN_LIST_node PARAMS ((rtx));
1441 rtx alloc_INSN_LIST PARAMS ((rtx, rtx));
1442 rtx alloc_EXPR_LIST PARAMS ((int, rtx, rtx));
1443 void clear_log_links PARAMS ((rtx));
1444
1445 /* regclass.c */
1446
1447 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1448 Always at least 3, since the combiner could put that many togetherm
1449 and we want this to remain correct for all the remaining passes. */
1450
1451 extern int max_parallel;
1452
1453 /* Free up register info memory. */
1454 extern void free_reg_info PARAMS ((void));
1455
1456 /* recog.c */
1457 extern int asm_noperands PARAMS ((rtx));
1458 extern const char *decode_asm_operands PARAMS ((rtx, rtx *, rtx **,
1459 const char **,
1460 enum machine_mode *));
1461
1462 extern enum reg_class reg_preferred_class PARAMS ((int));
1463 extern enum reg_class reg_alternate_class PARAMS ((int));
1464
1465 extern rtx get_first_nonparm_insn PARAMS ((void));
1466
1467 extern void split_all_insns PARAMS ((int));
1468
1469 #define MAX_SAVED_CONST_INT 64
1470 extern rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1471
1472 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1473 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1474 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1475 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1476 extern rtx const_true_rtx;
1477
1478 extern rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1479
1480 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1481 same as VOIDmode. */
1482
1483 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1484
1485 /* Likewise, for the constants 1 and 2. */
1486
1487 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1488 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1489
1490 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1491 is used to represent the frame pointer. This is because the
1492 hard frame pointer and the automatic variables are separated by an amount
1493 that cannot be determined until after register allocation. We can assume
1494 that in this case ELIMINABLE_REGS will be defined, one action of which
1495 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1496 #ifndef HARD_FRAME_POINTER_REGNUM
1497 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1498 #endif
1499
1500 /* Index labels for global_rtl. */
1501 enum global_rtl_index
1502 {
1503 GR_PC,
1504 GR_CC0,
1505 GR_STACK_POINTER,
1506 GR_FRAME_POINTER,
1507 /* For register elimination to work properly these hard_frame_pointer_rtx,
1508 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1509 the same register. */
1510 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1511 GR_ARG_POINTER = GR_FRAME_POINTER,
1512 #endif
1513 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1514 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1515 #else
1516 GR_HARD_FRAME_POINTER,
1517 #endif
1518 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1519 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1520 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1521 #else
1522 GR_ARG_POINTER,
1523 #endif
1524 #endif
1525 GR_VIRTUAL_INCOMING_ARGS,
1526 GR_VIRTUAL_STACK_ARGS,
1527 GR_VIRTUAL_STACK_DYNAMIC,
1528 GR_VIRTUAL_OUTGOING_ARGS,
1529 GR_VIRTUAL_CFA,
1530
1531 GR_MAX
1532 };
1533
1534 /* Pointers to standard pieces of rtx are stored here. */
1535 extern rtx global_rtl[GR_MAX];
1536
1537 /* Standard pieces of rtx, to be substituted directly into things. */
1538 #define pc_rtx (global_rtl[GR_PC])
1539 #define cc0_rtx (global_rtl[GR_CC0])
1540
1541 /* All references to certain hard regs, except those created
1542 by allocating pseudo regs into them (when that's possible),
1543 go through these unique rtx objects. */
1544 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1545 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1546 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1547 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
1548
1549 extern rtx pic_offset_table_rtx;
1550 extern rtx struct_value_rtx;
1551 extern rtx struct_value_incoming_rtx;
1552 extern rtx static_chain_rtx;
1553 extern rtx static_chain_incoming_rtx;
1554 extern rtx return_address_pointer_rtx;
1555
1556 /* Include the RTL generation functions. */
1557
1558 #ifndef NO_GENRTL_H
1559 #include "genrtl.h"
1560 #endif
1561
1562 /* There are some RTL codes that require special attention; the
1563 generation functions included above do the raw handling. If you
1564 add to this list, modify special_rtx in gengenrtl.c as well. You
1565 should also modify gen_rtx to use the special function. */
1566
1567 extern rtx gen_rtx_CONST_DOUBLE PARAMS ((enum machine_mode, rtx,
1568 HOST_WIDE_INT, HOST_WIDE_INT));
1569 extern rtx gen_rtx_CONST_INT PARAMS ((enum machine_mode, HOST_WIDE_INT));
1570 extern rtx gen_raw_REG PARAMS ((enum machine_mode, int));
1571 extern rtx gen_rtx_REG PARAMS ((enum machine_mode, int));
1572 extern rtx gen_rtx_MEM PARAMS ((enum machine_mode, rtx));
1573
1574 /* We need the cast here to ensure that we get the same result both with
1575 and without prototypes. */
1576 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N))
1577
1578 /* Virtual registers are used during RTL generation to refer to locations into
1579 the stack frame when the actual location isn't known until RTL generation
1580 is complete. The routine instantiate_virtual_regs replaces these with
1581 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1582 a constant. */
1583
1584 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1585
1586 /* This points to the first word of the incoming arguments passed on the stack,
1587 either by the caller or by the callee when pretending it was passed by the
1588 caller. */
1589
1590 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
1591
1592 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1593
1594 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1595 variable on the stack. Otherwise, it points to the first variable on
1596 the stack. */
1597
1598 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
1599
1600 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1601
1602 /* This points to the location of dynamically-allocated memory on the stack
1603 immediately after the stack pointer has been adjusted by the amount
1604 desired. */
1605
1606 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
1607
1608 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1609
1610 /* This points to the location in the stack at which outgoing arguments should
1611 be written when the stack is pre-pushed (arguments pushed using push
1612 insns always use sp). */
1613
1614 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
1615
1616 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1617
1618 /* This points to the Canonical Frame Address of the function. This
1619 should corrospond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1620 but is calculated relative to the arg pointer for simplicity; the
1621 frame pointer nor stack pointer are necessarily fixed relative to
1622 the CFA until after reload. */
1623
1624 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
1625
1626 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1627
1628 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
1629
1630 /* REGNUM never really appearing in the INSN stream. */
1631 #define INVALID_REGNUM (~(unsigned int)0)
1632
1633 extern rtx find_next_ref PARAMS ((rtx, rtx));
1634 extern rtx *find_single_use PARAMS ((rtx, rtx, rtx *));
1635
1636 extern rtx output_constant_def PARAMS ((union tree_node *, int));
1637 extern rtx immed_real_const PARAMS ((union tree_node *));
1638 extern union tree_node *make_tree PARAMS ((union tree_node *, rtx));
1639
1640 /* Define a default value for STORE_FLAG_VALUE. */
1641
1642 #ifndef STORE_FLAG_VALUE
1643 #define STORE_FLAG_VALUE 1
1644 #endif
1645
1646 /* Nonzero after the second flow pass has completed.
1647 Set to 1 or 0 by toplev.c */
1648 extern int flow2_completed;
1649
1650 /* Nonzero after end of reload pass.
1651 Set to 1 or 0 by reload1.c. */
1652
1653 extern int reload_completed;
1654
1655 /* Set to 1 while reload_as_needed is operating.
1656 Required by some machines to handle any generated moves differently. */
1657
1658 extern int reload_in_progress;
1659
1660 /* If this is nonzero, we do not bother generating VOLATILE
1661 around volatile memory references, and we are willing to
1662 output indirect addresses. If cse is to follow, we reject
1663 indirect addresses so a useful potential cse is generated;
1664 if it is used only once, instruction combination will produce
1665 the same indirect address eventually. */
1666 extern int cse_not_expected;
1667
1668 /* Set to nonzero before life analysis to indicate that it is unsafe to
1669 generate any new pseudo registers. */
1670 extern int no_new_pseudos;
1671
1672 /* Translates rtx code to tree code, for those codes needed by
1673 REAL_ARITHMETIC. The function returns an int because the caller may not
1674 know what `enum tree_code' means. */
1675
1676 extern int rtx_to_tree_code PARAMS ((enum rtx_code));
1677
1678 /* In tree.c */
1679 struct obstack;
1680 extern void gcc_obstack_init PARAMS ((struct obstack *));
1681
1682 /* In cse.c */
1683 struct cse_basic_block_data;
1684
1685 /* Return the right cost to give to an operation
1686 to make the cost of the corresponding register-to-register instruction
1687 N times that of a fast register-to-register instruction. */
1688 #define COSTS_N_INSNS(N) ((N) * 4)
1689
1690 /* Maximum cost of a rtl expression. This value has the special meaning
1691 not to use an rtx with this cost under any circumstances. */
1692 #define MAX_COST INT_MAX
1693
1694 extern int rtx_cost PARAMS ((rtx, enum rtx_code));
1695 extern int address_cost PARAMS ((rtx, enum machine_mode));
1696 extern void delete_trivially_dead_insns PARAMS ((rtx, int));
1697 #ifdef BUFSIZ
1698 extern int cse_main PARAMS ((rtx, int, int, FILE *));
1699 #endif
1700 extern void cse_end_of_basic_block PARAMS ((rtx,
1701 struct cse_basic_block_data *,
1702 int, int, int));
1703
1704 /* In jump.c */
1705 extern int comparison_dominates_p PARAMS ((enum rtx_code, enum rtx_code));
1706 extern int condjump_p PARAMS ((rtx));
1707 extern int any_condjump_p PARAMS ((rtx));
1708 extern int any_uncondjump_p PARAMS ((rtx));
1709 extern int safe_to_remove_jump_p PARAMS ((rtx));
1710 extern rtx pc_set PARAMS ((rtx));
1711 extern rtx condjump_label PARAMS ((rtx));
1712 extern int simplejump_p PARAMS ((rtx));
1713 extern int returnjump_p PARAMS ((rtx));
1714 extern int onlyjump_p PARAMS ((rtx));
1715 extern int sets_cc0_p PARAMS ((rtx));
1716 extern int invert_jump_1 PARAMS ((rtx, rtx));
1717 extern int invert_jump PARAMS ((rtx, rtx, int));
1718 extern int rtx_renumbered_equal_p PARAMS ((rtx, rtx));
1719 extern int true_regnum PARAMS ((rtx));
1720 extern int redirect_jump_1 PARAMS ((rtx, rtx));
1721 extern int redirect_jump PARAMS ((rtx, rtx, int));
1722 extern void jump_optimize PARAMS ((rtx, int, int, int));
1723 extern void jump_optimize_minimal PARAMS ((rtx));
1724 extern void rebuild_jump_labels PARAMS ((rtx));
1725 extern void thread_jumps PARAMS ((rtx, int, int));
1726 extern int rtx_equal_for_thread_p PARAMS ((rtx, rtx, rtx));
1727 extern int can_reverse_comparison_p PARAMS ((rtx, rtx));
1728 extern enum rtx_code reversed_comparison_code PARAMS ((rtx, rtx));
1729 extern enum rtx_code reversed_comparison_code_parts PARAMS ((enum rtx_code,
1730 rtx, rtx, rtx));
1731 extern void delete_for_peephole PARAMS ((rtx, rtx));
1732 extern int condjump_in_parallel_p PARAMS ((rtx));
1733 extern void never_reached_warning PARAMS ((rtx));
1734
1735 /* Flags for jump_optimize() */
1736 #define JUMP_CROSS_JUMP 1
1737 #define JUMP_CROSS_JUMP_DEATH_MATTERS 2
1738 #define JUMP_NOOP_MOVES 1
1739 #define JUMP_AFTER_REGSCAN 1
1740
1741 /* In emit-rtl.c. */
1742 extern int max_reg_num PARAMS ((void));
1743 extern int max_label_num PARAMS ((void));
1744 extern int get_first_label_num PARAMS ((void));
1745 extern void delete_insns_since PARAMS ((rtx));
1746 extern void mark_reg_pointer PARAMS ((rtx, int));
1747 extern void mark_user_reg PARAMS ((rtx));
1748 extern void reset_used_flags PARAMS ((rtx));
1749 extern void reorder_insns PARAMS ((rtx, rtx, rtx));
1750 extern int get_max_uid PARAMS ((void));
1751 extern int in_sequence_p PARAMS ((void));
1752 extern void force_next_line_note PARAMS ((void));
1753 extern void clear_emit_caches PARAMS ((void));
1754 extern void init_emit PARAMS ((void));
1755 extern void init_emit_once PARAMS ((int));
1756 extern void push_topmost_sequence PARAMS ((void));
1757 extern void pop_topmost_sequence PARAMS ((void));
1758 extern int subreg_realpart_p PARAMS ((rtx));
1759 extern void reverse_comparison PARAMS ((rtx));
1760 extern void set_new_first_and_last_insn PARAMS ((rtx, rtx));
1761 extern void set_new_first_and_last_label_num PARAMS ((int, int));
1762 extern void set_new_last_label_num PARAMS ((int));
1763 extern void unshare_all_rtl_again PARAMS ((rtx));
1764 extern void set_last_insn PARAMS ((rtx));
1765 extern void link_cc0_insns PARAMS ((rtx));
1766 extern void add_insn PARAMS ((rtx));
1767 extern void add_insn_before PARAMS ((rtx, rtx));
1768 extern void add_insn_after PARAMS ((rtx, rtx));
1769 extern void remove_insn PARAMS ((rtx));
1770 extern void reorder_insns_with_line_notes PARAMS ((rtx, rtx, rtx));
1771 extern void emit_insn_after_with_line_notes PARAMS ((rtx, rtx, rtx));
1772 extern enum rtx_code classify_insn PARAMS ((rtx));
1773 extern rtx emit PARAMS ((rtx));
1774 /* Query and clear/ restore no_line_numbers. This is used by the
1775 switch / case handling in stmt.c to give proper line numbers in
1776 warnings about unreachable code. */
1777 int force_line_numbers PARAMS ((void));
1778 void restore_line_number_status PARAMS ((int old_value));
1779 extern void renumber_insns PARAMS ((FILE *));
1780 extern void remove_unnecessary_notes PARAMS ((void));
1781
1782 /* In combine.c */
1783 extern int combine_instructions PARAMS ((rtx, unsigned int));
1784 extern unsigned int extended_count PARAMS ((rtx, enum machine_mode, int));
1785 extern rtx remove_death PARAMS ((unsigned int, rtx));
1786 #ifdef BUFSIZ
1787 extern void dump_combine_stats PARAMS ((FILE *));
1788 extern void dump_combine_total_stats PARAMS ((FILE *));
1789 #endif
1790
1791 /* In sched.c. */
1792 #ifdef BUFSIZ
1793 extern void schedule_insns PARAMS ((FILE *));
1794 extern void schedule_ebbs PARAMS ((FILE *));
1795 #endif
1796 extern void fix_sched_param PARAMS ((const char *, const char *));
1797
1798 /* In print-rtl.c */
1799 extern const char *print_rtx_head;
1800 extern void debug_rtx PARAMS ((rtx));
1801 extern void debug_rtx_list PARAMS ((rtx, int));
1802 extern void debug_rtx_range PARAMS ((rtx, rtx));
1803 extern rtx debug_rtx_find PARAMS ((rtx, int));
1804 #ifdef BUFSIZ
1805 extern void print_rtl PARAMS ((FILE *, rtx));
1806 extern void print_simple_rtl PARAMS ((FILE *, rtx));
1807 extern int print_rtl_single PARAMS ((FILE *, rtx));
1808 extern void print_inline_rtx PARAMS ((FILE *, rtx, int));
1809 #endif
1810
1811 /* In loop.c */
1812 extern void init_loop PARAMS ((void));
1813 extern rtx libcall_other_reg PARAMS ((rtx, rtx));
1814 #ifdef BUFSIZ
1815 extern void loop_optimize PARAMS ((rtx, FILE *, int));
1816 #endif
1817 extern void record_excess_regs PARAMS ((rtx, rtx, rtx *));
1818
1819 /* In function.c */
1820 extern void reposition_prologue_and_epilogue_notes PARAMS ((rtx));
1821 extern void thread_prologue_and_epilogue_insns PARAMS ((rtx));
1822 extern int prologue_epilogue_contains PARAMS ((rtx));
1823 extern int sibcall_epilogue_contains PARAMS ((rtx));
1824 extern HOST_WIDE_INT get_frame_size PARAMS ((void));
1825 extern void preserve_rtl_expr_result PARAMS ((rtx));
1826 extern void mark_temp_addr_taken PARAMS ((rtx));
1827 extern void update_temp_slot_address PARAMS ((rtx, rtx));
1828 extern void purge_addressof PARAMS ((rtx));
1829 extern void purge_hard_subreg_sets PARAMS ((rtx));
1830
1831 /* In reload.c */
1832 extern int operands_match_p PARAMS ((rtx, rtx));
1833 extern int safe_from_earlyclobber PARAMS ((rtx, rtx));
1834
1835 /* In stmt.c */
1836 extern void set_file_and_line_for_stmt PARAMS ((const char *, int));
1837 extern void expand_null_return PARAMS ((void));
1838 extern void emit_jump PARAMS ((rtx));
1839 extern int preserve_subexpressions_p PARAMS ((void));
1840
1841 /* In expr.c */
1842 extern void init_expr_once PARAMS ((void));
1843 extern void move_by_pieces PARAMS ((rtx, rtx,
1844 unsigned HOST_WIDE_INT,
1845 unsigned int));
1846
1847 /* In flow.c */
1848 extern void recompute_reg_usage PARAMS ((rtx, int));
1849 #ifdef BUFSIZ
1850 extern void print_rtl_with_bb PARAMS ((FILE *, rtx));
1851 extern void dump_flow_info PARAMS ((FILE *));
1852 #endif
1853
1854 /* In expmed.c */
1855 extern void init_expmed PARAMS ((void));
1856 extern void expand_inc PARAMS ((rtx, rtx));
1857 extern void expand_dec PARAMS ((rtx, rtx));
1858 extern rtx expand_mult_highpart PARAMS ((enum machine_mode, rtx,
1859 unsigned HOST_WIDE_INT, rtx,
1860 int, int));
1861
1862 /* In gcse.c */
1863 #ifdef BUFSIZ
1864 extern int gcse_main PARAMS ((rtx, FILE *));
1865 #endif
1866
1867 /* In global.c */
1868 extern void mark_elimination PARAMS ((int, int));
1869 #ifdef BUFSIZ
1870 extern int global_alloc PARAMS ((FILE *));
1871 extern void dump_global_regs PARAMS ((FILE *));
1872 #endif
1873 #ifdef HARD_CONST
1874 extern void retry_global_alloc PARAMS ((int, HARD_REG_SET));
1875 #endif
1876 extern void build_insn_chain PARAMS ((rtx));
1877
1878 /* In regclass.c */
1879 extern int reg_classes_intersect_p PARAMS ((enum reg_class, enum reg_class));
1880 extern int reg_class_subset_p PARAMS ((enum reg_class, enum reg_class));
1881 extern void globalize_reg PARAMS ((int));
1882 extern void init_regs PARAMS ((void));
1883 extern void init_reg_sets PARAMS ((void));
1884 extern void regset_release_memory PARAMS ((void));
1885 extern void regclass_init PARAMS ((void));
1886 extern void regclass PARAMS ((rtx, int, FILE *));
1887 extern void reg_scan PARAMS ((rtx, unsigned int, int));
1888 extern void reg_scan_update PARAMS ((rtx, rtx, unsigned int));
1889 extern void fix_register PARAMS ((const char *, int, int));
1890
1891 extern void delete_null_pointer_checks PARAMS ((rtx));
1892
1893 /* In regmove.c */
1894 #ifdef BUFSIZ
1895 extern void regmove_optimize PARAMS ((rtx, int, FILE *));
1896 #endif
1897 extern void combine_stack_adjustments PARAMS ((void));
1898
1899 /* In reorg.c */
1900 #ifdef BUFSIZ
1901 extern void dbr_schedule PARAMS ((rtx, FILE *));
1902 #endif
1903
1904 /* In optabs.c */
1905 extern void init_optabs PARAMS ((void));
1906
1907 /* In local-alloc.c */
1908 #ifdef BUFSIZ
1909 extern void dump_local_alloc PARAMS ((FILE *));
1910 #endif
1911 extern int local_alloc PARAMS ((void));
1912 extern int function_invariant_p PARAMS ((rtx));
1913
1914 /* In reload1.c */
1915 extern void reload_cse_regs PARAMS ((rtx));
1916 extern void init_reload PARAMS ((void));
1917 extern void mark_home_live PARAMS ((int));
1918 extern int reload PARAMS ((rtx, int));
1919
1920 /* In caller-save.c */
1921 extern void init_caller_save PARAMS ((void));
1922
1923 /* In profile.c */
1924 extern void init_branch_prob PARAMS ((const char *));
1925 extern void branch_prob PARAMS ((void));
1926 extern void end_branch_prob PARAMS ((void));
1927 extern void output_func_start_profiler PARAMS ((void));
1928
1929 /* In reg-stack.c */
1930 #ifdef BUFSIZ
1931 extern void reg_to_stack PARAMS ((rtx, FILE *));
1932 #endif
1933
1934 /* In fold-const.c */
1935 extern int add_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1936 unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1937 unsigned HOST_WIDE_INT *,
1938 HOST_WIDE_INT *));
1939 extern int neg_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1940 unsigned HOST_WIDE_INT *,
1941 HOST_WIDE_INT *));
1942 extern int mul_double PARAMS ((unsigned HOST_WIDE_INT,
1943 HOST_WIDE_INT,
1944 unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1945 unsigned HOST_WIDE_INT *,
1946 HOST_WIDE_INT *));
1947 extern void lshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1948 HOST_WIDE_INT, unsigned int,
1949 unsigned HOST_WIDE_INT *,
1950 HOST_WIDE_INT *, int));
1951 extern void rshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1952 HOST_WIDE_INT, unsigned int,
1953 unsigned HOST_WIDE_INT *,
1954 HOST_WIDE_INT *, int));
1955 extern void lrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1956 HOST_WIDE_INT, unsigned int,
1957 unsigned HOST_WIDE_INT *,
1958 HOST_WIDE_INT *));
1959 extern void rrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1960 HOST_WIDE_INT, unsigned int,
1961 unsigned HOST_WIDE_INT *,
1962 HOST_WIDE_INT *));
1963
1964 /* In calls.c */
1965 enum libcall_type
1966 {
1967 LCT_NORMAL = 0,
1968 LCT_CONST = 1,
1969 LCT_PURE = 2,
1970 LCT_CONST_MAKE_BLOCK = 3,
1971 LCT_PURE_MAKE_BLOCK = 4,
1972 LCT_NORETURN = 5
1973 };
1974
1975 extern void emit_library_call PARAMS ((rtx, enum libcall_type,
1976 enum machine_mode, int,
1977 ...));
1978 extern rtx emit_library_call_value PARAMS ((rtx, rtx, enum libcall_type,
1979 enum machine_mode, int,
1980 ...));
1981
1982 /* In unroll.c */
1983 extern int set_dominates_use PARAMS ((int, int, int, rtx, rtx));
1984
1985 /* In varasm.c */
1986 extern void bss_section PARAMS ((void));
1987 extern int in_data_section PARAMS ((void));
1988 extern int supports_one_only PARAMS ((void));
1989 extern void init_varasm_once PARAMS ((void));
1990
1991 /* In rtl.c */
1992 extern void init_rtl PARAMS ((void));
1993 extern void traverse_md_constants PARAMS ((int (*) (void **, void *),
1994 void *));
1995 struct md_constant { char *name, *value; };
1996
1997 #ifdef BUFSIZ
1998 extern int read_skip_spaces PARAMS ((FILE *));
1999 extern rtx read_rtx PARAMS ((FILE *));
2000 #endif
2001
2002 extern const char *read_rtx_filename;
2003 extern int read_rtx_lineno;
2004
2005 /* Redefine abort to report an internal error w/o coredump, and
2006 reporting the location of the error in the source file. This logic
2007 is duplicated in rtl.h and tree.h because every file that needs the
2008 special abort includes one or both. toplev.h gets too few files,
2009 system.h gets too many. */
2010
2011 extern void fancy_abort PARAMS ((const char *, int, const char *))
2012 ATTRIBUTE_NORETURN;
2013 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
2014
2015 /* In alias.c */
2016 extern rtx canon_rtx PARAMS ((rtx));
2017 extern int true_dependence PARAMS ((rtx, enum machine_mode, rtx,
2018 int (*)(rtx, int)));
2019 extern int read_dependence PARAMS ((rtx, rtx));
2020 extern int anti_dependence PARAMS ((rtx, rtx));
2021 extern int output_dependence PARAMS ((rtx, rtx));
2022 extern void mark_constant_function PARAMS ((void));
2023 extern void init_alias_once PARAMS ((void));
2024 extern void init_alias_analysis PARAMS ((void));
2025 extern void end_alias_analysis PARAMS ((void));
2026 extern rtx addr_side_effect_eval PARAMS ((rtx, int, int));
2027
2028 /* In sibcall.c */
2029 typedef enum {
2030 sibcall_use_normal = 1,
2031 sibcall_use_tail_recursion,
2032 sibcall_use_sibcall
2033 } sibcall_use_t;
2034
2035 extern void optimize_sibling_and_tail_recursive_calls PARAMS ((void));
2036 extern void replace_call_placeholder PARAMS ((rtx, sibcall_use_t));
2037
2038 #ifdef STACK_REGS
2039 extern int stack_regs_mentioned PARAMS ((rtx insn));
2040 #endif
2041
2042 /* In toplev.c */
2043 extern rtx stack_limit_rtx;
2044
2045 /* In regrename.c */
2046 extern void regrename_optimize PARAMS ((void));
2047
2048 /* In condexec.c */
2049 extern void if_convert PARAMS ((int));
2050
2051 #endif /* _RTL_H */
GNU Compiler Collection
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