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6f29feb1 | 1 | /* Register Transfer Language (RTL) definitions for GNU C-Compiler |
184bb750 | 2 | Copyright (C) 1987, 91-97, 1998 Free Software Foundation, Inc. |
6f29feb1 JW |
3 | |
4 | This file is part of GNU CC. | |
5 | ||
6 | GNU CC is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU CC is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU CC; see the file COPYING. If not, write to | |
e99215a3 RK |
18 | the Free Software Foundation, 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
6f29feb1 | 20 | |
ac957f13 JL |
21 | #ifndef _RTL_H |
22 | #define _RTL_H | |
6f29feb1 JW |
23 | |
24 | #include "machmode.h" | |
25 | ||
26 | #undef FFS /* Some systems predefine this symbol; don't let it interfere. */ | |
1cfc3092 | 27 | #undef FLOAT /* Likewise. */ |
ac889e46 | 28 | #undef ABS /* Likewise. */ |
71ae9cc6 | 29 | #undef PC /* Likewise. */ |
6f29feb1 | 30 | |
88efc60a RK |
31 | #ifndef TREE_CODE |
32 | union tree_node; | |
33 | #endif | |
34 | ||
6f29feb1 JW |
35 | /* Register Transfer Language EXPRESSIONS CODES */ |
36 | ||
37 | #define RTX_CODE enum rtx_code | |
38 | enum rtx_code { | |
39 | ||
40 | #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM , | |
41 | #include "rtl.def" /* rtl expressions are documented here */ | |
42 | #undef DEF_RTL_EXPR | |
43 | ||
6dc42e49 | 44 | LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for |
6f29feb1 | 45 | NUM_RTX_CODE. |
6dc42e49 | 46 | Assumes default enum value assignment. */ |
6f29feb1 JW |
47 | |
48 | #define NUM_RTX_CODE ((int)LAST_AND_UNUSED_RTX_CODE) | |
49 | /* The cast here, saves many elsewhere. */ | |
50 | ||
51 | extern int rtx_length[]; | |
0f41302f | 52 | #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)]) |
6f29feb1 JW |
53 | |
54 | extern char *rtx_name[]; | |
0f41302f | 55 | #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)]) |
6f29feb1 JW |
56 | |
57 | extern char *rtx_format[]; | |
0f41302f | 58 | #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)]) |
6f29feb1 JW |
59 | |
60 | extern char rtx_class[]; | |
0f41302f | 61 | #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)]) |
6f29feb1 | 62 | \f |
33f7f353 JR |
63 | /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label |
64 | relative to which the offsets are calculated, as explained in rtl.def. */ | |
65 | typedef struct | |
66 | { | |
67 | /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */ | |
68 | unsigned min_align: 8; | |
69 | /* Flags: */ | |
70 | unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */ | |
71 | unsigned min_after_vec: 1; /* minimum address target label is after the ADDR_DIFF_VEC. */ | |
72 | unsigned max_after_vec: 1; /* maximum address target label is after the ADDR_DIFF_VEC. */ | |
73 | unsigned min_after_base: 1; /* minimum address target label is after BASE. */ | |
74 | unsigned max_after_base: 1; /* maximum address target label is after BASE. */ | |
75 | /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */ | |
76 | unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */ | |
77 | unsigned : 2; | |
78 | unsigned scale : 8; | |
79 | } addr_diff_vec_flags; | |
80 | ||
6f29feb1 JW |
81 | /* Common union for an element of an rtx. */ |
82 | ||
83 | typedef union rtunion_def | |
84 | { | |
5f4f0e22 | 85 | HOST_WIDE_INT rtwint; |
6f29feb1 JW |
86 | int rtint; |
87 | char *rtstr; | |
88 | struct rtx_def *rtx; | |
89 | struct rtvec_def *rtvec; | |
90 | enum machine_mode rttype; | |
33f7f353 | 91 | addr_diff_vec_flags rt_addr_diff_vec_flags; |
0dfa1860 MM |
92 | struct bitmap_head_def *rtbit; |
93 | union tree_node *rttree; | |
6f29feb1 JW |
94 | } rtunion; |
95 | ||
96 | /* RTL expression ("rtx"). */ | |
97 | ||
98 | typedef struct rtx_def | |
99 | { | |
100 | #ifdef ONLY_INT_FIELDS | |
10c344b4 RS |
101 | #ifdef CODE_FIELD_BUG |
102 | unsigned int code : 16; | |
103 | #else | |
6f29feb1 | 104 | unsigned short code; |
10c344b4 | 105 | #endif |
6f29feb1 JW |
106 | #else |
107 | /* The kind of expression this is. */ | |
108 | enum rtx_code code : 16; | |
109 | #endif | |
110 | /* The kind of value the expression has. */ | |
111 | #ifdef ONLY_INT_FIELDS | |
112 | int mode : 8; | |
113 | #else | |
114 | enum machine_mode mode : 8; | |
115 | #endif | |
116 | /* 1 in an INSN if it can alter flow of control | |
117 | within this function. Not yet used! */ | |
118 | unsigned int jump : 1; | |
119 | /* 1 in an INSN if it can call another function. Not yet used! */ | |
120 | unsigned int call : 1; | |
121 | /* 1 in a MEM or REG if value of this expression will never change | |
122 | during the current function, even though it is not | |
123 | manifestly constant. | |
07be3989 | 124 | 1 in a SUBREG if it is from a promoted variable that is unsigned. |
6f29feb1 JW |
125 | 1 in a SYMBOL_REF if it addresses something in the per-function |
126 | constants pool. | |
127 | 1 in a CALL_INSN if it is a const call. | |
128 | 1 in a JUMP_INSN if it is a branch that should be annulled. Valid from | |
129 | reorg until end of compilation; cleared before used. */ | |
130 | unsigned int unchanging : 1; | |
131 | /* 1 in a MEM expression if contents of memory are volatile. | |
132 | 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL or BARRIER | |
133 | if it is deleted. | |
134 | 1 in a REG expression if corresponds to a variable declared by the user. | |
135 | 0 for an internally generated temporary. | |
2a406d2a RS |
136 | In a SYMBOL_REF, this flag is used for machine-specific purposes. |
137 | In a LABEL_REF or in a REG_LABEL note, this is LABEL_REF_NONLOCAL_P. */ | |
6f29feb1 JW |
138 | unsigned int volatil : 1; |
139 | /* 1 in a MEM referring to a field of a structure (not a union!). | |
140 | 0 if the MEM was a variable or the result of a * operator in C; | |
141 | 1 if it was the result of a . or -> operator (on a struct) in C. | |
142 | 1 in a REG if the register is used only in exit code a loop. | |
07be3989 RK |
143 | 1 in a SUBREG expression if was generated from a variable with a |
144 | promoted mode. | |
6f29feb1 JW |
145 | 1 in a CODE_LABEL if the label is used for nonlocal gotos |
146 | and must not be deleted even if its count is zero. | |
147 | 1 in a LABEL_REF if this is a reference to a label outside the | |
148 | current loop. | |
149 | 1 in an INSN, JUMP_INSN, or CALL_INSN if this insn must be scheduled | |
d45cf215 | 150 | together with the preceding insn. Valid only within sched. |
6f29feb1 JW |
151 | 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and |
152 | from the target of a branch. Valid from reorg until end of compilation; | |
153 | cleared before used. */ | |
154 | unsigned int in_struct : 1; | |
155 | /* 1 if this rtx is used. This is used for copying shared structure. | |
156 | See `unshare_all_rtl'. | |
157 | In a REG, this is not needed for that purpose, and used instead | |
158 | in `leaf_renumber_regs_insn'. | |
159 | In a SYMBOL_REF, means that emit_library_call | |
160 | has used it as the function. */ | |
161 | unsigned int used : 1; | |
162 | /* Nonzero if this rtx came from procedure integration. | |
163 | In a REG, nonzero means this reg refers to the return value | |
164 | of the current function. */ | |
165 | unsigned integrated : 1; | |
469ac993 JM |
166 | /* Nonzero if this rtx is related to the call frame, either changing how |
167 | we compute the frame address or saving and restoring registers in | |
168 | the prologue and epilogue. */ | |
169 | unsigned frame_related : 1; | |
6f29feb1 JW |
170 | /* The first element of the operands of this rtx. |
171 | The number of operands and their types are controlled | |
172 | by the `code' field, according to rtl.def. */ | |
173 | rtunion fld[1]; | |
174 | } *rtx; | |
175 | ||
61b39f42 | 176 | #include "gansidecl.h" |
88efc60a | 177 | |
6f29feb1 JW |
178 | #define NULL_RTX (rtx) 0 |
179 | ||
180 | /* Define macros to access the `code' field of the rtx. */ | |
181 | ||
182 | #ifdef SHORT_ENUM_BUG | |
183 | #define GET_CODE(RTX) ((enum rtx_code) ((RTX)->code)) | |
184 | #define PUT_CODE(RTX, CODE) ((RTX)->code = ((short) (CODE))) | |
185 | #else | |
186 | #define GET_CODE(RTX) ((RTX)->code) | |
187 | #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE)) | |
188 | #endif | |
189 | ||
190 | #define GET_MODE(RTX) ((RTX)->mode) | |
191 | #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE)) | |
192 | ||
193 | #define RTX_INTEGRATED_P(RTX) ((RTX)->integrated) | |
194 | #define RTX_UNCHANGING_P(RTX) ((RTX)->unchanging) | |
469ac993 | 195 | #define RTX_FRAME_RELATED_P(RTX) ((RTX)->frame_related) |
6f29feb1 JW |
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{ | |
e9a25f70 | 202 | int num_elem; /* number of elements */ |
6f29feb1 JW |
203 | rtunion elem[1]; |
204 | } *rtvec; | |
205 | ||
206 | #define NULL_RTVEC (rtvec) 0 | |
207 | ||
208 | #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem) | |
e9a25f70 | 209 | #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM)) |
6f29feb1 JW |
210 | |
211 | #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[(I)].rtx) | |
212 | ||
213 | /* 1 if X is a REG. */ | |
214 | ||
215 | #define REG_P(X) (GET_CODE (X) == REG) | |
216 | ||
217 | /* 1 if X is a constant value that is an integer. */ | |
218 | ||
219 | #define CONSTANT_P(X) \ | |
220 | (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \ | |
221 | || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE \ | |
222 | || GET_CODE (X) == CONST || GET_CODE (X) == HIGH) | |
223 | ||
224 | /* General accessor macros for accessing the fields of an rtx. */ | |
225 | ||
226 | #define XEXP(RTX, N) ((RTX)->fld[N].rtx) | |
227 | #define XINT(RTX, N) ((RTX)->fld[N].rtint) | |
5f4f0e22 | 228 | #define XWINT(RTX, N) ((RTX)->fld[N].rtwint) |
6f29feb1 JW |
229 | #define XSTR(RTX, N) ((RTX)->fld[N].rtstr) |
230 | #define XVEC(RTX, N) ((RTX)->fld[N].rtvec) | |
231 | #define XVECLEN(RTX, N) ((RTX)->fld[N].rtvec->num_elem) | |
232 | #define XVECEXP(RTX,N,M)((RTX)->fld[N].rtvec->elem[M].rtx) | |
0dfa1860 MM |
233 | #define XBITMAP(RTX, N) ((RTX)->fld[N].rtbit) |
234 | #define XTREE(RTX, N) ((RTX)->fld[N].rttree) | |
235 | ||
6f29feb1 JW |
236 | \f |
237 | /* ACCESS MACROS for particular fields of insns. */ | |
238 | ||
239 | /* Holds a unique number for each insn. | |
240 | These are not necessarily sequentially increasing. */ | |
241 | #define INSN_UID(INSN) ((INSN)->fld[0].rtint) | |
242 | ||
243 | /* Chain insns together in sequence. */ | |
244 | #define PREV_INSN(INSN) ((INSN)->fld[1].rtx) | |
245 | #define NEXT_INSN(INSN) ((INSN)->fld[2].rtx) | |
246 | ||
247 | /* The body of an insn. */ | |
248 | #define PATTERN(INSN) ((INSN)->fld[3].rtx) | |
249 | ||
250 | /* Code number of instruction, from when it was recognized. | |
251 | -1 means this instruction has not been recognized yet. */ | |
252 | #define INSN_CODE(INSN) ((INSN)->fld[4].rtint) | |
253 | ||
254 | /* Set up in flow.c; empty before then. | |
255 | Holds a chain of INSN_LIST rtx's whose first operands point at | |
256 | previous insns with direct data-flow connections to this one. | |
257 | That means that those insns set variables whose next use is in this insn. | |
258 | They are always in the same basic block as this insn. */ | |
259 | #define LOG_LINKS(INSN) ((INSN)->fld[5].rtx) | |
260 | ||
261 | /* 1 if insn has been deleted. */ | |
262 | #define INSN_DELETED_P(INSN) ((INSN)->volatil) | |
263 | ||
264 | /* 1 if insn is a call to a const function. */ | |
265 | #define CONST_CALL_P(INSN) ((INSN)->unchanging) | |
266 | ||
267 | /* 1 if insn is a branch that should not unconditionally execute its | |
268 | delay slots, i.e., it is an annulled branch. */ | |
269 | #define INSN_ANNULLED_BRANCH_P(INSN) ((INSN)->unchanging) | |
270 | ||
271 | /* 1 if insn is in a delay slot and is from the target of the branch. If | |
6dc42e49 | 272 | the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be |
6f29feb1 JW |
273 | executed if the branch is taken. For annulled branches with this bit |
274 | clear, the insn should be executed only if the branch is not taken. */ | |
275 | #define INSN_FROM_TARGET_P(INSN) ((INSN)->in_struct) | |
276 | ||
277 | /* Holds a list of notes on what this insn does to various REGs. | |
278 | It is a chain of EXPR_LIST rtx's, where the second operand | |
279 | is the chain pointer and the first operand is the REG being described. | |
280 | The mode field of the EXPR_LIST contains not a real machine mode | |
281 | but a value that says what this note says about the REG: | |
282 | REG_DEAD means that the value in REG dies in this insn (i.e., it is | |
283 | not needed past this insn). If REG is set in this insn, the REG_DEAD | |
284 | note may, but need not, be omitted. | |
285 | REG_INC means that the REG is autoincremented or autodecremented. | |
f75487ff ILT |
286 | REG_EQUIV describes the insn as a whole; it says that the insn |
287 | sets a register to a constant value or to be equivalent to a memory | |
288 | address. If the register is spilled to the stack then the constant | |
289 | value should be substituted for it. The contents of the REG_EQUIV | |
6f29feb1 | 290 | is the constant value or memory address, which may be different |
f75487ff ILT |
291 | from the source of the SET although it has the same value. A |
292 | REG_EQUIV note may also appear on an insn which copies a register | |
293 | parameter to a pseudo-register, if there is a memory address which | |
294 | could be used to hold that pseudo-register throughout the function. | |
6f29feb1 JW |
295 | REG_EQUAL is like REG_EQUIV except that the destination |
296 | is only momentarily equal to the specified rtx. Therefore, it | |
297 | cannot be used for substitution; but it can be used for cse. | |
298 | REG_RETVAL means that this insn copies the return-value of | |
299 | a library call out of the hard reg for return values. This note | |
300 | is actually an INSN_LIST and it points to the first insn involved | |
301 | in setting up arguments for the call. flow.c uses this to delete | |
302 | the entire library call when its result is dead. | |
303 | REG_LIBCALL is the inverse of REG_RETVAL: it goes on the first insn | |
304 | of the library call and points at the one that has the REG_RETVAL. | |
305 | REG_WAS_0 says that the register set in this insn held 0 before the insn. | |
306 | The contents of the note is the insn that stored the 0. | |
307 | If that insn is deleted or patched to a NOTE, the REG_WAS_0 is inoperative. | |
308 | The REG_WAS_0 note is actually an INSN_LIST, not an EXPR_LIST. | |
309 | REG_NONNEG means that the register is always nonnegative during | |
310 | the containing loop. This is used in branches so that decrement and | |
311 | branch instructions terminating on zero can be matched. There must be | |
312 | an insn pattern in the md file named `decrement_and_branch_until_zero' | |
313 | or else this will never be added to any instructions. | |
314 | REG_NO_CONFLICT means there is no conflict *after this insn* | |
315 | between the register in the note and the destination of this insn. | |
316 | REG_UNUSED identifies a register set in this insn and never used. | |
317 | REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use | |
318 | CC0, respectively. Normally, these are required to be consecutive insns, | |
319 | but we permit putting a cc0-setting insn in the delay slot of a branch | |
320 | as long as only one copy of the insn exists. In that case, these notes | |
321 | point from one to the other to allow code generation to determine what | |
322 | any require information and to properly update CC_STATUS. | |
323 | REG_LABEL points to a CODE_LABEL. Used by non-JUMP_INSNs to | |
324 | say that the CODE_LABEL contained in the REG_LABEL note is used | |
325 | by the insn. | |
d45cf215 | 326 | REG_DEP_ANTI is used in LOG_LINKS which represent anti (write after read) |
6f29feb1 JW |
327 | dependencies. REG_DEP_OUTPUT is used in LOG_LINKS which represent output |
328 | (write after write) dependencies. Data dependencies, which are the only | |
329 | type of LOG_LINK created by flow, are represented by a 0 reg note kind. */ | |
7ae21caf DE |
330 | /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs when the flag |
331 | -fbranch-probabilities is given. It has an integer value. For jumps, | |
332 | it is the probability that this is a taken branch. For calls, it is the | |
333 | probability that this call won't return. | |
334 | REG_EXEC_COUNT is attached to the first insn of each basic block, and | |
335 | the first insn after each CALL_INSN. It indicates how many times this | |
c107334d DM |
336 | block was executed. |
337 | REG_SAVE_AREA is used to optimize rtl generated by dynamic stack | |
338 | allocations for targets where SETJMP_VIA_SAVE_AREA is true. | |
339 | REG_BR_PRED is attached to JUMP_INSNs only, it holds the branch prediction | |
340 | flags computed by get_jump_flags() after dbr scheduling is complete. */ | |
341 | ||
6f29feb1 JW |
342 | |
343 | #define REG_NOTES(INSN) ((INSN)->fld[6].rtx) | |
344 | ||
33f7f353 JR |
345 | #define ADDR_DIFF_VEC_FLAGS(RTX) ((RTX)->fld[4].rt_addr_diff_vec_flags) |
346 | ||
6f29feb1 JW |
347 | /* Don't forget to change reg_note_name in rtl.c. */ |
348 | enum reg_note { REG_DEAD = 1, REG_INC = 2, REG_EQUIV = 3, REG_WAS_0 = 4, | |
349 | REG_EQUAL = 5, REG_RETVAL = 6, REG_LIBCALL = 7, | |
350 | REG_NONNEG = 8, REG_NO_CONFLICT = 9, REG_UNUSED = 10, | |
351 | REG_CC_SETTER = 11, REG_CC_USER = 12, REG_LABEL = 13, | |
7ae21caf | 352 | REG_DEP_ANTI = 14, REG_DEP_OUTPUT = 15, REG_BR_PROB = 16, |
c107334d | 353 | REG_EXEC_COUNT = 17, REG_NOALIAS = 18, REG_SAVE_AREA = 19, |
154bba13 | 354 | REG_BR_PRED = 20, REG_EH_CONTEXT = 21 }; |
7ae21caf DE |
355 | /* The base value for branch probability notes. */ |
356 | #define REG_BR_PROB_BASE 10000 | |
6f29feb1 JW |
357 | |
358 | /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */ | |
359 | #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK)) | |
360 | #define PUT_REG_NOTE_KIND(LINK,KIND) PUT_MODE(LINK, (enum machine_mode) (KIND)) | |
361 | ||
362 | /* Names for REG_NOTE's in EXPR_LIST insn's. */ | |
363 | ||
364 | extern char *reg_note_name[]; | |
0f41302f | 365 | #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)]) |
6f29feb1 | 366 | |
e51c6661 RK |
367 | /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of |
368 | USE and CLOBBER expressions. | |
369 | USE expressions list the registers filled with arguments that | |
370 | are passed to the function. | |
371 | CLOBBER expressions document the registers explicitly clobbered | |
372 | by this CALL_INSN. | |
373 | Pseudo registers can not be mentioned in this list. */ | |
374 | #define CALL_INSN_FUNCTION_USAGE(INSN) ((INSN)->fld[7].rtx) | |
375 | ||
6f29feb1 JW |
376 | /* The label-number of a code-label. The assembler label |
377 | is made from `L' and the label-number printed in decimal. | |
378 | Label numbers are unique in a compilation. */ | |
379 | #define CODE_LABEL_NUMBER(INSN) ((INSN)->fld[3].rtint) | |
380 | ||
381 | #define LINE_NUMBER NOTE | |
382 | ||
0dfa1860 MM |
383 | /* In a NOTE that is a line number, this is a string for the file name that the |
384 | line is in. We use the same field to record block numbers temporarily in | |
385 | NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts | |
386 | between ints and pointers if we use a different macro for the block number.) | |
387 | The NOTE_INSN_RANGE_{START,END} and NOTE_INSN_LIVE notes record their | |
388 | information as a rtx in the field. */ | |
6f29feb1 JW |
389 | |
390 | #define NOTE_SOURCE_FILE(INSN) ((INSN)->fld[3].rtstr) | |
3da3fb2f | 391 | #define NOTE_BLOCK_NUMBER(INSN) ((INSN)->fld[3].rtint) |
0dfa1860 MM |
392 | #define NOTE_RANGE_INFO(INSN) ((INSN)->fld[3].rtx) |
393 | #define NOTE_LIVE_INFO(INSN) ((INSN)->fld[3].rtx) | |
394 | ||
395 | /* If the NOTE_BLOCK_NUMBER field gets a -1, it means create a new | |
396 | block node for a live range block. */ | |
397 | #define NOTE_BLOCK_LIVE_RANGE_BLOCK -1 | |
6f29feb1 JW |
398 | |
399 | /* In a NOTE that is a line number, this is the line number. | |
400 | Other kinds of NOTEs are identified by negative numbers here. */ | |
401 | #define NOTE_LINE_NUMBER(INSN) ((INSN)->fld[4].rtint) | |
402 | ||
403 | /* Codes that appear in the NOTE_LINE_NUMBER field | |
a31efb86 | 404 | for kinds of notes that are not line numbers. |
6f29feb1 | 405 | |
a31efb86 DE |
406 | Notice that we do not try to use zero here for any of |
407 | the special note codes because sometimes the source line | |
408 | actually can be zero! This happens (for example) when we | |
409 | are generating code for the per-translation-unit constructor | |
410 | and destructor routines for some C++ translation unit. | |
411 | ||
412 | If you should change any of the following values, or if you | |
413 | should add a new value here, don't forget to change the | |
414 | note_insn_name array in rtl.c. */ | |
6f29feb1 JW |
415 | |
416 | /* This note is used to get rid of an insn | |
417 | when it isn't safe to patch the insn out of the chain. */ | |
418 | #define NOTE_INSN_DELETED -1 | |
419 | #define NOTE_INSN_BLOCK_BEG -2 | |
420 | #define NOTE_INSN_BLOCK_END -3 | |
421 | #define NOTE_INSN_LOOP_BEG -4 | |
422 | #define NOTE_INSN_LOOP_END -5 | |
423 | /* This kind of note is generated at the end of the function body, | |
424 | just before the return insn or return label. | |
425 | In an optimizing compilation it is deleted by the first jump optimization, | |
426 | after enabling that optimizer to determine whether control can fall | |
427 | off the end of the function body without a return statement. */ | |
428 | #define NOTE_INSN_FUNCTION_END -6 | |
429 | /* This kind of note is generated just after each call to `setjmp', et al. */ | |
430 | #define NOTE_INSN_SETJMP -7 | |
431 | /* Generated at the place in a loop that `continue' jumps to. */ | |
432 | #define NOTE_INSN_LOOP_CONT -8 | |
433 | /* Generated at the start of a duplicated exit test. */ | |
434 | #define NOTE_INSN_LOOP_VTOP -9 | |
bdac5f58 TW |
435 | /* This marks the point immediately after the last prologue insn. */ |
436 | #define NOTE_INSN_PROLOGUE_END -10 | |
437 | /* This marks the point immediately prior to the first epilogue insn. */ | |
438 | #define NOTE_INSN_EPILOGUE_BEG -11 | |
196cedd0 RS |
439 | /* Generated in place of user-declared labels when they are deleted. */ |
440 | #define NOTE_INSN_DELETED_LABEL -12 | |
a31efb86 DE |
441 | /* This note indicates the start of the real body of the function, |
442 | i.e. the point just after all of the parms have been moved into | |
443 | their homes, etc. */ | |
444 | #define NOTE_INSN_FUNCTION_BEG -13 | |
3d195391 MS |
445 | /* These note where exception handling regions begin and end. */ |
446 | #define NOTE_INSN_EH_REGION_BEG -14 | |
447 | #define NOTE_INSN_EH_REGION_END -15 | |
7ae21caf DE |
448 | /* Generated whenever a duplicate line number note is output. For example, |
449 | one is output after the end of an inline function, in order to prevent | |
450 | the line containing the inline call from being counted twice in gcov. */ | |
451 | #define NOTE_REPEATED_LINE_NUMBER -16 | |
6f29feb1 | 452 | |
0dfa1860 MM |
453 | /* Start/end of a live range region, where pseudos allocated on the stack can |
454 | be allocated to temporary registers. */ | |
455 | #define NOTE_INSN_RANGE_START -17 | |
456 | #define NOTE_INSN_RANGE_END -18 | |
457 | /* Record which registers are currently live. */ | |
458 | #define NOTE_INSN_LIVE -19 | |
10f07067 RS |
459 | |
460 | #if 0 /* These are not used, and I don't know what they were for. --rms. */ | |
6f29feb1 JW |
461 | #define NOTE_DECL_NAME(INSN) ((INSN)->fld[3].rtstr) |
462 | #define NOTE_DECL_CODE(INSN) ((INSN)->fld[4].rtint) | |
463 | #define NOTE_DECL_RTL(INSN) ((INSN)->fld[5].rtx) | |
464 | #define NOTE_DECL_IDENTIFIER(INSN) ((INSN)->fld[6].rtint) | |
465 | #define NOTE_DECL_TYPE(INSN) ((INSN)->fld[7].rtint) | |
10f07067 | 466 | #endif /* 0 */ |
6f29feb1 JW |
467 | |
468 | /* Names for NOTE insn's other than line numbers. */ | |
469 | ||
470 | extern char *note_insn_name[]; | |
471 | #define GET_NOTE_INSN_NAME(NOTE_CODE) (note_insn_name[-(NOTE_CODE)]) | |
472 | ||
473 | /* The name of a label, in case it corresponds to an explicit label | |
474 | in the input source code. */ | |
475 | #define LABEL_NAME(LABEL) ((LABEL)->fld[4].rtstr) | |
476 | ||
477 | /* In jump.c, each label contains a count of the number | |
478 | of LABEL_REFs that point at it, so unused labels can be deleted. */ | |
479 | #define LABEL_NUSES(LABEL) ((LABEL)->fld[5].rtint) | |
480 | ||
e9a25f70 JL |
481 | /* The original regno this ADDRESSOF was built for. */ |
482 | #define ADDRESSOF_REGNO(RTX) ((RTX)->fld[1].rtint) | |
483 | ||
484 | /* The variable in the register we took the address of. */ | |
485 | #define ADDRESSOF_DECL(X) ((tree) XEXP ((X), 2)) | |
486 | #define SET_ADDRESSOF_DECL(X, T) (XEXP ((X), 2) = (rtx) (T)) | |
487 | ||
6f29feb1 JW |
488 | /* In jump.c, each JUMP_INSN can point to a label that it can jump to, |
489 | so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can | |
490 | be decremented and possibly the label can be deleted. */ | |
491 | #define JUMP_LABEL(INSN) ((INSN)->fld[7].rtx) | |
492 | ||
493 | /* Once basic blocks are found in flow.c, | |
494 | each CODE_LABEL starts a chain that goes through | |
495 | all the LABEL_REFs that jump to that label. | |
496 | The chain eventually winds up at the CODE_LABEL; it is circular. */ | |
f754c4a1 | 497 | #define LABEL_REFS(LABEL) ((LABEL)->fld[6].rtx) |
6f29feb1 JW |
498 | \f |
499 | /* This is the field in the LABEL_REF through which the circular chain | |
500 | of references to a particular label is linked. | |
501 | This chain is set up in flow.c. */ | |
502 | ||
503 | #define LABEL_NEXTREF(REF) ((REF)->fld[1].rtx) | |
504 | ||
505 | /* Once basic blocks are found in flow.c, | |
506 | Each LABEL_REF points to its containing instruction with this field. */ | |
507 | ||
508 | #define CONTAINING_INSN(RTX) ((RTX)->fld[2].rtx) | |
509 | ||
510 | /* For a REG rtx, REGNO extracts the register number. */ | |
511 | ||
512 | #define REGNO(RTX) ((RTX)->fld[0].rtint) | |
513 | ||
514 | /* For a REG rtx, REG_FUNCTION_VALUE_P is nonzero if the reg | |
515 | is the current function's return value. */ | |
516 | ||
517 | #define REG_FUNCTION_VALUE_P(RTX) ((RTX)->integrated) | |
518 | ||
519 | /* 1 in a REG rtx if it corresponds to a variable declared by the user. */ | |
520 | #define REG_USERVAR_P(RTX) ((RTX)->volatil) | |
521 | ||
522 | /* For a CONST_INT rtx, INTVAL extracts the integer. */ | |
523 | ||
5f4f0e22 | 524 | #define INTVAL(RTX) ((RTX)->fld[0].rtwint) |
6f29feb1 JW |
525 | |
526 | /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of. | |
527 | SUBREG_WORD extracts the word-number. */ | |
528 | ||
529 | #define SUBREG_REG(RTX) ((RTX)->fld[0].rtx) | |
530 | #define SUBREG_WORD(RTX) ((RTX)->fld[1].rtint) | |
531 | ||
07be3989 RK |
532 | /* 1 if the REG contained in SUBREG_REG is already known to be |
533 | sign- or zero-extended from the mode of the SUBREG to the mode of | |
534 | the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the | |
535 | extension. | |
536 | ||
537 | When used as a LHS, is means that this extension must be done | |
538 | when assigning to SUBREG_REG. */ | |
539 | ||
540 | #define SUBREG_PROMOTED_VAR_P(RTX) ((RTX)->in_struct) | |
541 | #define SUBREG_PROMOTED_UNSIGNED_P(RTX) ((RTX)->unchanging) | |
542 | ||
6f29feb1 JW |
543 | /* Access various components of an ASM_OPERANDS rtx. */ |
544 | ||
545 | #define ASM_OPERANDS_TEMPLATE(RTX) XSTR ((RTX), 0) | |
546 | #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XSTR ((RTX), 1) | |
547 | #define ASM_OPERANDS_OUTPUT_IDX(RTX) XINT ((RTX), 2) | |
548 | #define ASM_OPERANDS_INPUT_VEC(RTX) XVEC ((RTX), 3) | |
549 | #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XVEC ((RTX), 4) | |
550 | #define ASM_OPERANDS_INPUT(RTX, N) XVECEXP ((RTX), 3, (N)) | |
551 | #define ASM_OPERANDS_INPUT_LENGTH(RTX) XVECLEN ((RTX), 3) | |
552 | #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) XSTR (XVECEXP ((RTX), 4, (N)), 0) | |
553 | #define ASM_OPERANDS_INPUT_MODE(RTX, N) GET_MODE (XVECEXP ((RTX), 4, (N))) | |
554 | #define ASM_OPERANDS_SOURCE_FILE(RTX) XSTR ((RTX), 5) | |
555 | #define ASM_OPERANDS_SOURCE_LINE(RTX) XINT ((RTX), 6) | |
556 | ||
557 | /* For a MEM rtx, 1 if it's a volatile reference. | |
558 | Also in an ASM_OPERANDS rtx. */ | |
559 | #define MEM_VOLATILE_P(RTX) ((RTX)->volatil) | |
560 | ||
561 | /* For a MEM rtx, 1 if it refers to a structure or union component. */ | |
562 | #define MEM_IN_STRUCT_P(RTX) ((RTX)->in_struct) | |
563 | ||
564 | /* For a LABEL_REF, 1 means that this reference is to a label outside the | |
565 | loop containing the reference. */ | |
566 | #define LABEL_OUTSIDE_LOOP_P(RTX) ((RTX)->in_struct) | |
567 | ||
adfaf10a | 568 | /* For a LABEL_REF, 1 means it is for a nonlocal label. */ |
2a406d2a | 569 | /* Likewise in an EXPR_LIST for a REG_LABEL note. */ |
adfaf10a RS |
570 | #define LABEL_REF_NONLOCAL_P(RTX) ((RTX)->volatil) |
571 | ||
6f29feb1 JW |
572 | /* For a CODE_LABEL, 1 means always consider this label to be needed. */ |
573 | #define LABEL_PRESERVE_P(RTX) ((RTX)->in_struct) | |
574 | ||
575 | /* For a REG, 1 means the register is used only in an exit test of a loop. */ | |
576 | #define REG_LOOP_TEST_P(RTX) ((RTX)->in_struct) | |
577 | ||
578 | /* During sched, for an insn, 1 means that the insn must be scheduled together | |
d45cf215 | 579 | with the preceding insn. */ |
6f29feb1 JW |
580 | #define SCHED_GROUP_P(INSN) ((INSN)->in_struct) |
581 | ||
c376c05b TW |
582 | /* During sched, for the LOG_LINKS of an insn, these cache the adjusted |
583 | cost of the dependence link. The cost of executing an instruction | |
584 | may vary based on how the results are used. LINK_COST_ZERO is 1 when | |
585 | the cost through the link varies and is unchanged (i.e., the link has | |
586 | zero additional cost). LINK_COST_FREE is 1 when the cost through the | |
587 | link is zero (i.e., the link makes the cost free). In other cases, | |
588 | the adjustment to the cost is recomputed each time it is needed. */ | |
589 | #define LINK_COST_ZERO(X) ((X)->jump) | |
590 | #define LINK_COST_FREE(X) ((X)->call) | |
591 | ||
6f29feb1 JW |
592 | /* For a SET rtx, SET_DEST is the place that is set |
593 | and SET_SRC is the value it is set to. */ | |
594 | #define SET_DEST(RTX) ((RTX)->fld[0].rtx) | |
595 | #define SET_SRC(RTX) ((RTX)->fld[1].rtx) | |
596 | ||
597 | /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */ | |
598 | #define TRAP_CONDITION(RTX) ((RTX)->fld[0].rtx) | |
599 | ||
600 | /* 1 in a SYMBOL_REF if it addresses this function's constants pool. */ | |
601 | #define CONSTANT_POOL_ADDRESS_P(RTX) ((RTX)->unchanging) | |
602 | ||
603 | /* Flag in a SYMBOL_REF for machine-specific purposes. */ | |
604 | #define SYMBOL_REF_FLAG(RTX) ((RTX)->volatil) | |
605 | ||
606 | /* 1 means a SYMBOL_REF has been the library function in emit_library_call. */ | |
607 | #define SYMBOL_REF_USED(RTX) ((RTX)->used) | |
608 | ||
609 | /* For an INLINE_HEADER rtx, FIRST_FUNCTION_INSN is the first insn | |
610 | of the function that is not involved in copying parameters to | |
611 | pseudo-registers. FIRST_PARM_INSN is the very first insn of | |
612 | the function, including the parameter copying. | |
613 | We keep this around in case we must splice | |
614 | this function into the assembly code at the end of the file. | |
615 | FIRST_LABELNO is the first label number used by the function (inclusive). | |
616 | LAST_LABELNO is the last label used by the function (exclusive). | |
617 | MAX_REGNUM is the largest pseudo-register used by that function. | |
618 | FUNCTION_ARGS_SIZE is the size of the argument block in the stack. | |
619 | POPS_ARGS is the number of bytes of input arguments popped by the function | |
620 | STACK_SLOT_LIST is the list of stack slots. | |
2fbb1ada | 621 | FORCED_LABELS is the list of labels whose address was taken. |
6f29feb1 JW |
622 | FUNCTION_FLAGS are where single-bit flags are saved. |
623 | OUTGOING_ARGS_SIZE is the size of the largest outgoing stack parameter list. | |
624 | ORIGINAL_ARG_VECTOR is a vector of the original DECL_RTX values | |
625 | for the function arguments. | |
626 | ORIGINAL_DECL_INITIAL is a pointer to the original DECL_INITIAL for the | |
627 | function. | |
ee5fb731 RK |
628 | INLINE_REGNO_REG_RTX, INLINE_REGNO_POINTER_FLAG, and |
629 | INLINE_REGNO_POINTER_ALIGN are pointers to the corresponding arrays. | |
6f29feb1 JW |
630 | |
631 | We want this to lay down like an INSN. The PREV_INSN field | |
632 | is always NULL. The NEXT_INSN field always points to the | |
633 | first function insn of the function being squirreled away. */ | |
634 | ||
635 | #define FIRST_FUNCTION_INSN(RTX) ((RTX)->fld[2].rtx) | |
636 | #define FIRST_PARM_INSN(RTX) ((RTX)->fld[3].rtx) | |
637 | #define FIRST_LABELNO(RTX) ((RTX)->fld[4].rtint) | |
638 | #define LAST_LABELNO(RTX) ((RTX)->fld[5].rtint) | |
639 | #define MAX_PARMREG(RTX) ((RTX)->fld[6].rtint) | |
640 | #define MAX_REGNUM(RTX) ((RTX)->fld[7].rtint) | |
641 | #define FUNCTION_ARGS_SIZE(RTX) ((RTX)->fld[8].rtint) | |
642 | #define POPS_ARGS(RTX) ((RTX)->fld[9].rtint) | |
643 | #define STACK_SLOT_LIST(RTX) ((RTX)->fld[10].rtx) | |
2fbb1ada RK |
644 | #define FORCED_LABELS(RTX) ((RTX)->fld[11].rtx) |
645 | #define FUNCTION_FLAGS(RTX) ((RTX)->fld[12].rtint) | |
646 | #define OUTGOING_ARGS_SIZE(RTX) ((RTX)->fld[13].rtint) | |
647 | #define ORIGINAL_ARG_VECTOR(RTX) ((RTX)->fld[14].rtvec) | |
648 | #define ORIGINAL_DECL_INITIAL(RTX) ((RTX)->fld[15].rtx) | |
ee5fb731 | 649 | #define INLINE_REGNO_REG_RTX(RTX) ((RTX)->fld[16].rtvec) |
67f21747 JW |
650 | #define INLINE_REGNO_POINTER_FLAG(RTX) ((RTX)->fld[17].rtstr) |
651 | #define INLINE_REGNO_POINTER_ALIGN(RTX) ((RTX)->fld[18].rtstr) | |
e9a25f70 | 652 | #define PARMREG_STACK_LOC(RTX) ((RTX)->fld[19].rtvec) |
6f29feb1 JW |
653 | |
654 | /* In FUNCTION_FLAGS we save some variables computed when emitting the code | |
655 | for the function and which must be `or'ed into the current flag values when | |
656 | insns from that function are being inlined. */ | |
657 | ||
658 | /* These ought to be an enum, but non-ANSI compilers don't like that. */ | |
659 | #define FUNCTION_FLAGS_CALLS_ALLOCA 01 | |
660 | #define FUNCTION_FLAGS_CALLS_SETJMP 02 | |
661 | #define FUNCTION_FLAGS_RETURNS_STRUCT 04 | |
662 | #define FUNCTION_FLAGS_RETURNS_PCC_STRUCT 010 | |
663 | #define FUNCTION_FLAGS_NEEDS_CONTEXT 020 | |
664 | #define FUNCTION_FLAGS_HAS_NONLOCAL_LABEL 040 | |
665 | #define FUNCTION_FLAGS_RETURNS_POINTER 0100 | |
666 | #define FUNCTION_FLAGS_USES_CONST_POOL 0200 | |
667 | #define FUNCTION_FLAGS_CALLS_LONGJMP 0400 | |
668 | #define FUNCTION_FLAGS_USES_PIC_OFFSET_TABLE 01000 | |
669 | ||
670 | /* Define a macro to look for REG_INC notes, | |
671 | but save time on machines where they never exist. */ | |
672 | ||
58e54c44 RS |
673 | /* Don't continue this line--convex cc version 4.1 would lose. */ |
674 | #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT)) | |
6f29feb1 JW |
675 | #define FIND_REG_INC_NOTE(insn, reg) (find_reg_note ((insn), REG_INC, (reg))) |
676 | #else | |
677 | #define FIND_REG_INC_NOTE(insn, reg) 0 | |
678 | #endif | |
679 | ||
680 | /* Indicate whether the machine has any sort of auto increment addressing. | |
681 | If not, we can avoid checking for REG_INC notes. */ | |
682 | ||
58e54c44 RS |
683 | /* Don't continue this line--convex cc version 4.1 would lose. */ |
684 | #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT)) | |
6f29feb1 JW |
685 | #define AUTO_INC_DEC |
686 | #endif | |
0dfa1860 MM |
687 | |
688 | /* Accessors for RANGE_INFO. */ | |
689 | /* For RANGE_{START,END} notes return the RANGE_START note. */ | |
690 | #define RANGE_INFO_NOTE_START(INSN) (XEXP (INSN, 0)) | |
691 | ||
692 | /* For RANGE_{START,END} notes return the RANGE_START note. */ | |
693 | #define RANGE_INFO_NOTE_END(INSN) (XEXP (INSN, 1)) | |
694 | ||
695 | /* For RANGE_{START,END} notes, return the vector containing the registers used | |
696 | in the range. */ | |
697 | #define RANGE_INFO_REGS(INSN) (XVEC (INSN, 2)) | |
698 | #define RANGE_INFO_REGS_REG(INSN, N) (XVECEXP (INSN, 2, N)) | |
699 | #define RANGE_INFO_NUM_REGS(INSN) (XVECLEN (INSN, 2)) | |
700 | ||
701 | /* For RANGE_{START,END} notes, the number of calls within the range. */ | |
702 | #define RANGE_INFO_NCALLS(INSN) (XINT (INSN, 3)) | |
703 | ||
704 | /* For RANGE_{START,END} notes, the number of insns within the range. */ | |
705 | #define RANGE_INFO_NINSNS(INSN) (XINT (INSN, 4)) | |
706 | ||
707 | /* For RANGE_{START,END} notes, a unique # to identify this range. */ | |
708 | #define RANGE_INFO_UNIQUE(INSN) (XINT (INSN, 5)) | |
709 | ||
710 | /* For RANGE_{START,END} notes, the basic block # the range starts with. */ | |
711 | #define RANGE_INFO_BB_START(INSN) (XINT (INSN, 6)) | |
712 | ||
713 | /* For RANGE_{START,END} notes, the basic block # the range ends with. */ | |
714 | #define RANGE_INFO_BB_END(INSN) (XINT (INSN, 7)) | |
715 | ||
716 | /* For RANGE_{START,END} notes, the loop depth the range is in. */ | |
717 | #define RANGE_INFO_LOOP_DEPTH(INSN) (XINT (INSN, 8)) | |
718 | ||
719 | /* For RANGE_{START,END} notes, the bitmap of live registers at the start | |
720 | of the range. */ | |
721 | #define RANGE_INFO_LIVE_START(INSN) (XBITMAP (INSN, 9)) | |
722 | ||
723 | /* For RANGE_{START,END} notes, the bitmap of live registers at the end | |
724 | of the range. */ | |
725 | #define RANGE_INFO_LIVE_END(INSN) (XBITMAP (INSN, 10)) | |
726 | ||
727 | /* For RANGE_START notes, the marker # of the start of the range. */ | |
728 | #define RANGE_INFO_MARKER_START(INSN) (XINT (INSN, 11)) | |
729 | ||
730 | /* For RANGE_START notes, the marker # of the end of the range. */ | |
731 | #define RANGE_INFO_MARKER_END(INSN) (XINT (INSN, 12)) | |
732 | ||
733 | /* Original pseudo register # for a live range note. */ | |
734 | #define RANGE_REG_PSEUDO(INSN,N) (XINT (XVECEXP (INSN, 2, N), 0)) | |
735 | ||
736 | /* Pseudo register # original register is copied into or -1. */ | |
737 | #define RANGE_REG_COPY(INSN,N) (XINT (XVECEXP (INSN, 2, N), 1)) | |
738 | ||
739 | /* How many times a register in a live range note was referenced. */ | |
740 | #define RANGE_REG_REFS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 2)) | |
741 | ||
742 | /* How many times a register in a live range note was set. */ | |
743 | #define RANGE_REG_SETS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 3)) | |
744 | ||
745 | /* How many times a register in a live range note died. */ | |
746 | #define RANGE_REG_DEATHS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 4)) | |
747 | ||
748 | /* Whether the original value is needed to be copied into the range register at | |
749 | the start of the range. */ | |
750 | #define RANGE_REG_COPY_FLAGS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 5)) | |
751 | ||
752 | /* # of insns the register copy is live over. */ | |
753 | #define RANGE_REG_LIVE_LENGTH(INSN,N) (XINT (XVECEXP (INSN, 2, N), 6)) | |
754 | ||
755 | /* # of calls the register copy is live over. */ | |
756 | #define RANGE_REG_N_CALLS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 7)) | |
757 | ||
758 | /* DECL_NODE pointer of the declaration if the register is a user defined | |
759 | variable. */ | |
760 | #define RANGE_REG_SYMBOL_NODE(INSN,N) (XTREE (XVECEXP (INSN, 2, N), 8)) | |
761 | ||
762 | /* BLOCK_NODE pointer to the block the variable is declared in if the | |
763 | register is a user defined variable. */ | |
764 | #define RANGE_REG_BLOCK_NODE(INSN,N) (XTREE (XVECEXP (INSN, 2, N), 9)) | |
765 | ||
766 | /* EXPR_LIST of the distinct ranges a variable is in. */ | |
767 | #define RANGE_VAR_LIST(INSN) (XEXP (INSN, 0)) | |
768 | ||
769 | /* Block a variable is declared in. */ | |
770 | #define RANGE_VAR_BLOCK(INSN) (XTREE (INSN, 1)) | |
771 | ||
772 | /* # of distinct ranges a variable is in. */ | |
773 | #define RANGE_VAR_NUM(INSN) (XINT (INSN, 2)) | |
774 | ||
775 | /* For a NOTE_INSN_LIVE note, the registers which are currently live. */ | |
776 | #define RANGE_LIVE_BITMAP(INSN) (XBITMAP (INSN, 0)) | |
777 | ||
778 | /* For a NOTE_INSN_LIVE note, the original basic block number. */ | |
779 | #define RANGE_LIVE_ORIG_BLOCK(INSN) (XINT (INSN, 1)) | |
6f29feb1 JW |
780 | \f |
781 | /* Generally useful functions. */ | |
782 | ||
5f4f0e22 CH |
783 | /* The following functions accept a wide integer argument. Rather than |
784 | having to cast on every function call, we use a macro instead, that is | |
785 | defined here and in tree.h. */ | |
786 | ||
787 | #ifndef exact_log2 | |
ac957f13 JL |
788 | #define exact_log2(N) exact_log2_wide ((unsigned HOST_WIDE_INT) (N)) |
789 | #define floor_log2(N) floor_log2_wide ((unsigned HOST_WIDE_INT) (N)) | |
5f4f0e22 | 790 | #endif |
ac957f13 JL |
791 | extern int exact_log2_wide PROTO((unsigned HOST_WIDE_INT)); |
792 | extern int floor_log2_wide PROTO((unsigned HOST_WIDE_INT)); | |
793 | ||
794 | /* In expmed.c */ | |
795 | extern int ceil_log2 PROTO((unsigned HOST_WIDE_INT)); | |
5f4f0e22 CH |
796 | |
797 | #define plus_constant(X,C) plus_constant_wide (X, (HOST_WIDE_INT) (C)) | |
798 | ||
799 | #define plus_constant_for_output(X,C) \ | |
800 | plus_constant_for_output_wide (X, (HOST_WIDE_INT) (C)) | |
801 | ||
f837a861 MM |
802 | extern rtx plus_constant_wide PROTO((rtx, HOST_WIDE_INT)); |
803 | extern rtx plus_constant_for_output_wide PROTO((rtx, HOST_WIDE_INT)); | |
5f4f0e22 | 804 | |
bdea67fa RK |
805 | extern rtx gen_rtx PVPROTO((enum rtx_code, |
806 | enum machine_mode, ...)); | |
807 | extern rtvec gen_rtvec PVPROTO((int, ...)); | |
f837a861 | 808 | |
e9a25f70 JL |
809 | #ifdef BUFSIZ |
810 | extern rtx read_rtx PROTO((FILE *)); | |
811 | #endif | |
f837a861 MM |
812 | |
813 | #if 0 | |
814 | /* At present, don't prototype xrealloc, since all of the callers don't | |
815 | cast their pointers to char *, and all of the xrealloc's don't use | |
816 | void * yet. */ | |
bbfd16d4 RK |
817 | extern char *xmalloc PROTO((size_t)); |
818 | extern char *xrealloc PROTO((void *, size_t)); | |
f837a861 | 819 | #else |
bbfd16d4 | 820 | extern char *xmalloc (); |
f837a861 MM |
821 | extern char *xrealloc (); |
822 | #endif | |
823 | ||
f837a861 MM |
824 | extern char *oballoc PROTO((int)); |
825 | extern char *permalloc PROTO((int)); | |
f837a861 MM |
826 | extern rtx rtx_alloc PROTO((RTX_CODE)); |
827 | extern rtvec rtvec_alloc PROTO((int)); | |
f837a861 MM |
828 | extern rtx copy_rtx PROTO((rtx)); |
829 | extern rtx copy_rtx_if_shared PROTO((rtx)); | |
830 | extern rtx copy_most_rtx PROTO((rtx, rtx)); | |
f837a861 | 831 | extern rtvec gen_rtvec_v PROTO((int, rtx *)); |
da3a3ba6 | 832 | extern rtvec gen_rtvec_vv PROTO((int, rtunion *)); |
f837a861 MM |
833 | extern rtx gen_reg_rtx PROTO((enum machine_mode)); |
834 | extern rtx gen_label_rtx PROTO((void)); | |
2fbb1ada RK |
835 | extern rtx gen_inline_header_rtx PROTO((rtx, rtx, int, int, int, int, |
836 | int, int, rtx, rtx, int, int, | |
ee5fb731 | 837 | rtvec, rtx, |
e9a25f70 | 838 | rtvec, char *, char *, rtvec)); |
f837a861 MM |
839 | extern rtx gen_lowpart_common PROTO((enum machine_mode, rtx)); |
840 | extern rtx gen_lowpart PROTO((enum machine_mode, rtx)); | |
841 | extern rtx gen_lowpart_if_possible PROTO((enum machine_mode, rtx)); | |
24f8db99 | 842 | extern rtx gen_highpart PROTO((enum machine_mode, rtx)); |
1577a9b4 RS |
843 | extern rtx gen_realpart PROTO((enum machine_mode, rtx)); |
844 | extern rtx gen_imagpart PROTO((enum machine_mode, rtx)); | |
f837a861 MM |
845 | extern rtx operand_subword PROTO((rtx, int, int, enum machine_mode)); |
846 | extern rtx operand_subword_force PROTO((rtx, int, enum machine_mode)); | |
847 | extern int subreg_lowpart_p PROTO((rtx)); | |
848 | extern rtx make_safe_from PROTO((rtx, rtx)); | |
9c5f2956 | 849 | extern rtx convert_memory_address PROTO((enum machine_mode, rtx)); |
f837a861 MM |
850 | extern rtx memory_address PROTO((enum machine_mode, rtx)); |
851 | extern rtx get_insns PROTO((void)); | |
852 | extern rtx get_last_insn PROTO((void)); | |
853 | extern rtx get_last_insn_anywhere PROTO((void)); | |
854 | extern void start_sequence PROTO((void)); | |
855 | extern void push_to_sequence PROTO((rtx)); | |
856 | extern void end_sequence PROTO((void)); | |
857 | extern rtx gen_sequence PROTO((void)); | |
858 | extern rtx immed_double_const PROTO((HOST_WIDE_INT, HOST_WIDE_INT, enum machine_mode)); | |
859 | extern rtx force_const_mem PROTO((enum machine_mode, rtx)); | |
860 | extern rtx force_reg PROTO((enum machine_mode, rtx)); | |
861 | extern rtx get_pool_constant PROTO((rtx)); | |
862 | extern enum machine_mode get_pool_mode PROTO((rtx)); | |
863 | extern int get_pool_offset PROTO((rtx)); | |
9ee96709 | 864 | extern rtx simplify_subtraction PROTO((rtx)); |
e5e809f4 JL |
865 | extern rtx assign_stack_local PROTO((enum machine_mode, |
866 | HOST_WIDE_INT, int)); | |
867 | extern rtx assign_stack_temp PROTO((enum machine_mode, | |
868 | HOST_WIDE_INT, int)); | |
869 | extern rtx assign_temp PROTO((union tree_node *, | |
870 | int, int, int)); | |
f837a861 MM |
871 | extern rtx protect_from_queue PROTO((rtx, int)); |
872 | extern void emit_queue PROTO((void)); | |
873 | extern rtx emit_move_insn PROTO((rtx, rtx)); | |
874 | extern rtx emit_insn_before PROTO((rtx, rtx)); | |
875 | extern rtx emit_jump_insn_before PROTO((rtx, rtx)); | |
876 | extern rtx emit_call_insn_before PROTO((rtx, rtx)); | |
877 | extern rtx emit_barrier_before PROTO((rtx)); | |
878 | extern rtx emit_note_before PROTO((int, rtx)); | |
879 | extern rtx emit_insn_after PROTO((rtx, rtx)); | |
880 | extern rtx emit_jump_insn_after PROTO((rtx, rtx)); | |
881 | extern rtx emit_barrier_after PROTO((rtx)); | |
882 | extern rtx emit_label_after PROTO((rtx, rtx)); | |
883 | extern rtx emit_note_after PROTO((int, rtx)); | |
884 | extern rtx emit_line_note_after PROTO((char *, int, rtx)); | |
885 | extern rtx emit_insn PROTO((rtx)); | |
886 | extern rtx emit_insns PROTO((rtx)); | |
887 | extern rtx emit_insns_before PROTO((rtx, rtx)); | |
81f59869 | 888 | extern rtx emit_insns_after PROTO((rtx, rtx)); |
f837a861 MM |
889 | extern rtx emit_jump_insn PROTO((rtx)); |
890 | extern rtx emit_call_insn PROTO((rtx)); | |
891 | extern rtx emit_label PROTO((rtx)); | |
892 | extern rtx emit_barrier PROTO((void)); | |
893 | extern rtx emit_line_note PROTO((char *, int)); | |
894 | extern rtx emit_note PROTO((char *, int)); | |
895 | extern rtx emit_line_note_force PROTO((char *, int)); | |
896 | extern rtx make_insn_raw PROTO((rtx)); | |
897 | extern rtx previous_insn PROTO((rtx)); | |
898 | extern rtx next_insn PROTO((rtx)); | |
899 | extern rtx prev_nonnote_insn PROTO((rtx)); | |
900 | extern rtx next_nonnote_insn PROTO((rtx)); | |
901 | extern rtx prev_real_insn PROTO((rtx)); | |
902 | extern rtx next_real_insn PROTO((rtx)); | |
903 | extern rtx prev_active_insn PROTO((rtx)); | |
904 | extern rtx next_active_insn PROTO((rtx)); | |
905 | extern rtx prev_label PROTO((rtx)); | |
906 | extern rtx next_label PROTO((rtx)); | |
907 | extern rtx next_cc0_user PROTO((rtx)); | |
908 | extern rtx prev_cc0_setter PROTO((rtx)); | |
f837a861 MM |
909 | extern rtx next_nondeleted_insn PROTO((rtx)); |
910 | extern enum rtx_code reverse_condition PROTO((enum rtx_code)); | |
911 | extern enum rtx_code swap_condition PROTO((enum rtx_code)); | |
912 | extern enum rtx_code unsigned_condition PROTO((enum rtx_code)); | |
913 | extern enum rtx_code signed_condition PROTO((enum rtx_code)); | |
914 | extern rtx find_equiv_reg PROTO((rtx, rtx, enum reg_class, int, short *, int, enum machine_mode)); | |
915 | extern rtx squeeze_notes PROTO((rtx, rtx)); | |
916 | extern rtx delete_insn PROTO((rtx)); | |
917 | extern void delete_jump PROTO((rtx)); | |
918 | extern rtx get_label_before PROTO((rtx)); | |
919 | extern rtx get_label_after PROTO((rtx)); | |
920 | extern rtx follow_jumps PROTO((rtx)); | |
921 | extern rtx adj_offsettable_operand PROTO((rtx, int)); | |
922 | extern rtx try_split PROTO((rtx, rtx, int)); | |
923 | extern rtx split_insns PROTO((rtx, rtx)); | |
924 | extern rtx simplify_unary_operation PROTO((enum rtx_code, enum machine_mode, rtx, enum machine_mode)); | |
925 | extern rtx simplify_binary_operation PROTO((enum rtx_code, enum machine_mode, rtx, rtx)); | |
926 | extern rtx simplify_ternary_operation PROTO((enum rtx_code, enum machine_mode, enum machine_mode, rtx, rtx, rtx)); | |
927 | extern rtx simplify_relational_operation PROTO((enum rtx_code, enum machine_mode, rtx, rtx)); | |
928 | extern rtx nonlocal_label_rtx_list PROTO((void)); | |
929 | extern rtx gen_move_insn PROTO((rtx, rtx)); | |
930 | extern rtx gen_jump PROTO((rtx)); | |
931 | extern rtx gen_beq PROTO((rtx)); | |
932 | extern rtx gen_bge PROTO((rtx)); | |
933 | extern rtx gen_ble PROTO((rtx)); | |
e9a25f70 | 934 | extern rtx gen_mem_addressof PROTO((rtx, union tree_node *)); |
f837a861 | 935 | extern rtx eliminate_constant_term PROTO((rtx, rtx *)); |
d03cc004 | 936 | extern rtx expand_complex_abs PROTO((enum machine_mode, rtx, rtx, int)); |
a021f58a | 937 | extern enum machine_mode choose_hard_reg_mode PROTO((int, int)); |
9ae8ffe7 JL |
938 | extern int rtx_varies_p PROTO((rtx)); |
939 | extern int may_trap_p PROTO((rtx)); | |
940 | extern int side_effects_p PROTO((rtx)); | |
941 | extern int volatile_refs_p PROTO((rtx)); | |
942 | extern int volatile_insn_p PROTO((rtx)); | |
943 | extern void remove_note PROTO((rtx, rtx)); | |
ac957f13 | 944 | extern void note_stores PROTO((rtx, void (*) (rtx, rtx))); |
9ae8ffe7 JL |
945 | extern int refers_to_regno_p PROTO((int, int, rtx, rtx *)); |
946 | extern int reg_overlap_mentioned_p PROTO((rtx, rtx)); | |
8c660648 | 947 | extern rtx find_use_as_address PROTO((rtx, rtx, HOST_WIDE_INT)); |
9ae8ffe7 | 948 | |
e9a25f70 JL |
949 | /* Functions in rtlanal.c */ |
950 | ||
951 | extern int rtx_unstable_p PROTO((rtx)); | |
952 | extern int rtx_varies_p PROTO((rtx)); | |
953 | extern int rtx_addr_varies_p PROTO((rtx)); | |
954 | extern HOST_WIDE_INT get_integer_term PROTO((rtx)); | |
955 | extern rtx get_related_value PROTO((rtx)); | |
956 | extern int reg_mentioned_p PROTO((rtx, rtx)); | |
957 | extern int reg_referenced_p PROTO((rtx, rtx)); | |
958 | extern int reg_used_between_p PROTO((rtx, rtx, rtx)); | |
959 | extern int reg_referenced_between_p PROTO((rtx, rtx, rtx)); | |
960 | extern int reg_set_between_p PROTO((rtx, rtx, rtx)); | |
961 | extern int modified_between_p PROTO((rtx, rtx, rtx)); | |
962 | extern int no_labels_between_p PROTO((rtx, rtx)); | |
963 | extern int modified_in_p PROTO((rtx, rtx)); | |
964 | extern int reg_set_p PROTO((rtx, rtx)); | |
965 | extern rtx single_set PROTO((rtx)); | |
966 | extern rtx find_last_value PROTO((rtx, rtx *, rtx)); | |
967 | extern int refers_to_regno_p PROTO((int, int, rtx, rtx *)); | |
968 | extern int reg_overlap_mentioned_p PROTO((rtx, rtx)); | |
e9a25f70 JL |
969 | extern rtx reg_set_last PROTO((rtx, rtx)); |
970 | extern int rtx_equal_p PROTO((rtx, rtx)); | |
971 | extern int dead_or_set_p PROTO((rtx, rtx)); | |
972 | extern int dead_or_set_regno_p PROTO((rtx, int)); | |
973 | extern rtx find_reg_note PROTO((rtx, enum reg_note, rtx)); | |
974 | extern rtx find_regno_note PROTO((rtx, enum reg_note, int)); | |
975 | extern int find_reg_fusage PROTO((rtx, enum rtx_code, rtx)); | |
976 | extern int find_regno_fusage PROTO((rtx, enum rtx_code, int)); | |
977 | extern void remove_note PROTO((rtx, rtx)); | |
978 | extern int side_effects_p PROTO((rtx)); | |
979 | extern int volatile_refs_p PROTO((rtx)); | |
980 | extern int volatile_insn_p PROTO((rtx)); | |
981 | extern int may_trap_p PROTO((rtx)); | |
982 | extern int inequality_comparison_p PROTO((rtx)); | |
983 | extern rtx replace_rtx PROTO((rtx, rtx, rtx)); | |
984 | extern rtx replace_regs PROTO((rtx, rtx *, int, int)); | |
ac957f13 | 985 | extern int computed_jump_p PROTO((rtx)); |
6f29feb1 JW |
986 | |
987 | /* Maximum number of parallel sets and clobbers in any insn in this fn. | |
988 | Always at least 3, since the combiner could put that many togetherm | |
989 | and we want this to remain correct for all the remaining passes. */ | |
990 | ||
991 | extern int max_parallel; | |
992 | ||
f837a861 MM |
993 | extern int asm_noperands PROTO((rtx)); |
994 | extern char *decode_asm_operands PROTO((rtx, rtx *, rtx **, char **, enum machine_mode *)); | |
6f29feb1 | 995 | |
f837a861 MM |
996 | extern enum reg_class reg_preferred_class PROTO((int)); |
997 | extern enum reg_class reg_alternate_class PROTO((int)); | |
6f29feb1 | 998 | |
f837a861 | 999 | extern rtx get_first_nonparm_insn PROTO((void)); |
6f29feb1 JW |
1000 | |
1001 | /* Standard pieces of rtx, to be substituted directly into things. */ | |
68d75312 JC |
1002 | #define pc_rtx (&global_rtl.pc_val) |
1003 | #define cc0_rtx (&global_rtl.cc0_val) | |
1004 | ||
1005 | #define MAX_SAVED_CONST_INT 64 | |
1006 | extern struct rtx_def const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1]; | |
1007 | ||
1008 | #define const0_rtx (&const_int_rtx[MAX_SAVED_CONST_INT]) | |
1009 | #define const1_rtx (&const_int_rtx[MAX_SAVED_CONST_INT+1]) | |
1010 | #define const2_rtx (&const_int_rtx[MAX_SAVED_CONST_INT+2]) | |
1011 | #define constm1_rtx (&const_int_rtx[MAX_SAVED_CONST_INT-1]) | |
6f29feb1 | 1012 | extern rtx const_true_rtx; |
a8efe40d RK |
1013 | |
1014 | extern rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE]; | |
1015 | ||
1016 | /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the | |
1017 | same as VOIDmode. */ | |
1018 | ||
1019 | #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)]) | |
1020 | ||
1021 | /* Likewise, for the constants 1 and 2. */ | |
1022 | ||
1023 | #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)]) | |
1024 | #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)]) | |
6f29feb1 | 1025 | |
68d75312 JC |
1026 | extern struct _global_rtl |
1027 | { | |
1028 | struct rtx_def pc_val, cc0_val; | |
1029 | struct rtx_def stack_pointer_val, frame_pointer_val; | |
1030 | struct rtx_def hard_frame_pointer_val; | |
1031 | struct rtx_def arg_pointer_val; | |
1032 | struct rtx_def virtual_incoming_args_val; | |
1033 | struct rtx_def virtual_stack_vars_val; | |
1034 | struct rtx_def virtual_stack_dynamic_val; | |
1035 | struct rtx_def virtual_outgoing_args_val; | |
1036 | } global_rtl; | |
1037 | ||
6f29feb1 JW |
1038 | /* All references to certain hard regs, except those created |
1039 | by allocating pseudo regs into them (when that's possible), | |
1040 | go through these unique rtx objects. */ | |
68d75312 JC |
1041 | #define stack_pointer_rtx (&global_rtl.stack_pointer_val) |
1042 | #define frame_pointer_rtx (&global_rtl.frame_pointer_val) | |
1043 | ||
6f29feb1 JW |
1044 | extern rtx pic_offset_table_rtx; |
1045 | extern rtx struct_value_rtx; | |
1046 | extern rtx struct_value_incoming_rtx; | |
1047 | extern rtx static_chain_rtx; | |
1048 | extern rtx static_chain_incoming_rtx; | |
1049 | ||
3b80f6ca RH |
1050 | |
1051 | /* Include the RTL generation functions. */ | |
1052 | ||
1053 | #ifndef NO_GENRTL_H | |
1054 | #include "genrtl.h" | |
1055 | #endif | |
1056 | ||
1057 | /* There are two RTL codes that require special attention; the generation | |
1058 | functions included above do the raw handling. */ | |
1059 | ||
1060 | extern rtx gen_rtx_CONST_INT PROTO((enum machine_mode, HOST_WIDE_INT)); | |
1061 | extern rtx gen_rtx_REG PROTO((enum machine_mode, int)); | |
1062 | ||
aefdd5ab JL |
1063 | /* We need the cast here to ensure that we get the same result both with |
1064 | and without prototypes. */ | |
1065 | #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N)) | |
3b80f6ca RH |
1066 | |
1067 | ||
3ba71656 DE |
1068 | /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg |
1069 | is used to represent the frame pointer. This is because the | |
1070 | hard frame pointer and the automatic variables are separated by an amount | |
1071 | that cannot be determined until after register allocation. We can assume | |
1072 | that in this case ELIMINABLE_REGS will be defined, one action of which | |
1073 | will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */ | |
1074 | #ifndef HARD_FRAME_POINTER_REGNUM | |
1075 | #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM | |
1076 | #endif | |
1077 | ||
68d75312 JC |
1078 | /* For register elimination to work properly these hard_frame_pointer_rtx, |
1079 | frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to | |
1080 | the same register. */ | |
1081 | #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM | |
1082 | #define hard_frame_pointer_rtx (&global_rtl.frame_pointer_val) | |
1083 | #else | |
1084 | #define hard_frame_pointer_rtx (&global_rtl.hard_frame_pointer_val) | |
1085 | #endif | |
1086 | ||
1087 | #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM | |
1088 | #define arg_pointer_rtx (&global_rtl.frame_pointer_val) | |
1089 | #else | |
ffc3503d | 1090 | #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM |
68d75312 JC |
1091 | #define arg_pointer_rtx (&global_rtl.hard_frame_pointer_val) |
1092 | #else | |
1093 | #define arg_pointer_rtx (&global_rtl.arg_pointer_val) | |
1094 | #endif | |
1095 | #endif | |
1096 | ||
6f29feb1 JW |
1097 | /* Virtual registers are used during RTL generation to refer to locations into |
1098 | the stack frame when the actual location isn't known until RTL generation | |
1099 | is complete. The routine instantiate_virtual_regs replaces these with | |
1100 | the proper value, which is normally {frame,arg,stack}_pointer_rtx plus | |
1101 | a constant. */ | |
1102 | ||
1103 | #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER) | |
1104 | ||
1105 | /* This points to the first word of the incoming arguments passed on the stack, | |
1106 | either by the caller or by the callee when pretending it was passed by the | |
1107 | caller. */ | |
1108 | ||
68d75312 | 1109 | #define virtual_incoming_args_rtx (&global_rtl.virtual_incoming_args_val) |
6f29feb1 JW |
1110 | |
1111 | #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER) | |
1112 | ||
60343c3b | 1113 | /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first |
6f29feb1 JW |
1114 | variable on the stack. Otherwise, it points to the first variable on |
1115 | the stack. */ | |
1116 | ||
68d75312 | 1117 | #define virtual_stack_vars_rtx (&global_rtl.virtual_stack_vars_val) |
6f29feb1 JW |
1118 | |
1119 | #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1) | |
1120 | ||
1121 | /* This points to the location of dynamically-allocated memory on the stack | |
1122 | immediately after the stack pointer has been adjusted by the amount | |
1123 | desired. */ | |
1124 | ||
68d75312 | 1125 | #define virtual_stack_dynamic_rtx (&global_rtl.virtual_stack_dynamic_val) |
6f29feb1 JW |
1126 | |
1127 | #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2) | |
1128 | ||
1129 | /* This points to the location in the stack at which outgoing arguments should | |
1130 | be written when the stack is pre-pushed (arguments pushed using push | |
1131 | insns always use sp). */ | |
1132 | ||
68d75312 | 1133 | #define virtual_outgoing_args_rtx (&global_rtl.virtual_outgoing_args_val) |
6f29feb1 JW |
1134 | |
1135 | #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3) | |
1136 | ||
1137 | #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 3) | |
1138 | ||
f837a861 MM |
1139 | extern rtx find_next_ref PROTO((rtx, rtx)); |
1140 | extern rtx *find_single_use PROTO((rtx, rtx, rtx *)); | |
1141 | ||
1142 | /* It is hard to write the prototype for expand_expr, since it needs | |
1143 | expr.h to be included for the enumeration. */ | |
1144 | ||
1145 | extern rtx expand_expr (); | |
f837a861 | 1146 | |
88efc60a RK |
1147 | extern rtx output_constant_def PROTO((union tree_node *)); |
1148 | extern rtx immed_real_const PROTO((union tree_node *)); | |
1149 | extern union tree_node *make_tree PROTO((union tree_node *, rtx)); | |
6f29feb1 | 1150 | |
a89b2cc4 MM |
1151 | /* Abort routines */ |
1152 | extern void fatal_insn_not_found PROTO((rtx)); | |
1153 | extern void fatal_insn PROTO((char *, rtx)); | |
1154 | ||
6f29feb1 JW |
1155 | /* Define a default value for STORE_FLAG_VALUE. */ |
1156 | ||
1157 | #ifndef STORE_FLAG_VALUE | |
1158 | #define STORE_FLAG_VALUE 1 | |
1159 | #endif | |
1160 | ||
1161 | /* Nonzero after end of reload pass. | |
1162 | Set to 1 or 0 by toplev.c. */ | |
1163 | ||
1164 | extern int reload_completed; | |
1165 | ||
1166 | /* Set to 1 while reload_as_needed is operating. | |
1167 | Required by some machines to handle any generated moves differently. */ | |
1168 | ||
1169 | extern int reload_in_progress; | |
1170 | ||
1171 | /* If this is nonzero, we do not bother generating VOLATILE | |
1172 | around volatile memory references, and we are willing to | |
1173 | output indirect addresses. If cse is to follow, we reject | |
1174 | indirect addresses so a useful potential cse is generated; | |
1175 | if it is used only once, instruction combination will produce | |
1176 | the same indirect address eventually. */ | |
1177 | extern int cse_not_expected; | |
1178 | ||
1179 | /* Indexed by pseudo register number, gives the rtx for that pseudo. | |
1180 | Allocated in parallel with regno_pointer_flag. */ | |
1181 | extern rtx *regno_reg_rtx; | |
f5118aa5 | 1182 | |
68d75312 JC |
1183 | /* Vector indexed by regno; contain the alignment in bytes and type |
1184 | pointed to for a register that contains a pointer, if known. */ | |
aacd9b3f RE |
1185 | extern char *regno_pointer_align; |
1186 | #define REGNO_POINTER_ALIGN(REGNO) regno_pointer_align[REGNO] | |
1187 | ||
f5118aa5 | 1188 | /* Translates rtx code to tree code, for those codes needed by |
88efc60a RK |
1189 | REAL_ARITHMETIC. The function returns an int because the caller may not |
1190 | know what `enum tree_code' means. */ | |
1191 | ||
1192 | extern int rtx_to_tree_code PROTO((enum rtx_code)); | |
9ae8ffe7 | 1193 | |
ac957f13 JL |
1194 | /* In rtlanal.c */ |
1195 | extern int reg_set_p PROTO ((rtx, rtx)); | |
1196 | extern int reg_mentioned_p PROTO ((rtx, rtx)); | |
1197 | extern int reg_referenced_p PROTO ((rtx, rtx)); | |
1198 | extern int reg_used_between_p PROTO ((rtx, rtx, rtx)); | |
1199 | extern int reg_set_p PROTO ((rtx, rtx)); | |
1200 | extern int reg_referenced_between_p PROTO ((rtx, rtx, rtx)); | |
1201 | extern int reg_set_between_p PROTO ((rtx, rtx, rtx)); | |
1202 | extern int rtx_unstable_p PROTO ((rtx)); | |
1203 | extern int rtx_addr_varies_p PROTO ((rtx)); | |
1204 | extern int rtx_equal_p PROTO ((rtx, rtx)); | |
1205 | extern int inequality_comparisons_p PROTO ((rtx)); | |
1206 | extern int dead_or_set_p PROTO ((rtx, rtx)); | |
1207 | extern int dead_or_set_regno_p PROTO ((rtx, int)); | |
1208 | extern int no_labels_between_p PROTO ((rtx, rtx)); | |
1209 | extern int modified_between_p PROTO ((rtx, rtx, rtx)); | |
1210 | extern int modified_in_p PROTO ((rtx, rtx)); | |
1211 | ||
1212 | /* In tree.c */ | |
1213 | extern void obfree PROTO ((char *)); | |
1214 | struct obstack; | |
1215 | extern void gcc_obstack_init PROTO ((struct obstack *)); | |
1216 | extern void pop_obstacks PROTO ((void)); | |
1217 | extern void push_obstacks PROTO ((struct obstack *, | |
1218 | struct obstack *)); | |
1219 | #ifdef BUFSIZ | |
1220 | extern int read_skip_spaces PROTO ((FILE *)); | |
1221 | #endif | |
1222 | ||
1223 | /* In cse.c */ | |
1224 | struct cse_basic_block_data; | |
1225 | extern int rtx_cost PROTO ((rtx, enum rtx_code)); | |
c6a26dc4 | 1226 | extern void delete_trivially_dead_insns PROTO ((rtx, int)); |
ac957f13 JL |
1227 | #ifdef BUFSIZ |
1228 | extern int cse_main PROTO ((rtx, int, int, FILE *)); | |
1229 | #endif | |
1230 | extern void cse_end_of_basic_block PROTO ((rtx, | |
1231 | struct cse_basic_block_data *, | |
1232 | int, int, int)); | |
1233 | ||
1234 | /* In jump.c */ | |
1235 | extern int comparison_dominates_p PROTO ((enum rtx_code, enum rtx_code)); | |
1236 | extern int condjump_p PROTO ((rtx)); | |
1237 | extern int simplejump_p PROTO ((rtx)); | |
1238 | extern int sets_cc0_p PROTO ((rtx)); | |
1239 | extern int invert_jump PROTO ((rtx, rtx)); | |
1240 | extern int rtx_renumbered_equal_p PROTO ((rtx, rtx)); | |
1241 | extern int true_regnum PROTO ((rtx)); | |
1242 | extern int redirect_jump PROTO ((rtx, rtx)); | |
1243 | extern void jump_optimize PROTO ((rtx, int, int, int)); | |
1244 | extern void thread_jumps PROTO ((rtx, int, int)); | |
1245 | extern int redirect_exp PROTO ((rtx *, rtx, rtx, rtx)); | |
1246 | extern int rtx_equal_for_thread_p PROTO ((rtx, rtx, rtx)); | |
1247 | extern int invert_exp PROTO ((rtx, rtx)); | |
1248 | extern int can_reverse_comparison_p PROTO ((rtx, rtx)); | |
1249 | extern void delete_for_peephole PROTO ((rtx, rtx)); | |
1250 | extern int condjump_in_parallel_p PROTO ((rtx)); | |
1251 | ||
14bf4a33 MM |
1252 | /* Flags for jump_optimize() */ |
1253 | #define JUMP_CROSS_JUMP 1 | |
1254 | #define JUMP_NOOP_MOVES 1 | |
1255 | #define JUMP_AFTER_REGSCAN 1 | |
1256 | ||
ac957f13 JL |
1257 | /* In emit-rtl.c. */ |
1258 | extern int max_reg_num PROTO ((void)); | |
1259 | extern int max_label_num PROTO ((void)); | |
1260 | extern int get_first_label_num PROTO ((void)); | |
1261 | extern void delete_insns_since PROTO ((rtx)); | |
1262 | extern void mark_reg_pointer PROTO ((rtx, int)); | |
1263 | extern void mark_user_reg PROTO ((rtx)); | |
1264 | extern void reset_used_flags PROTO ((rtx)); | |
1265 | extern void reorder_insns PROTO ((rtx, rtx, rtx)); | |
1266 | extern int get_max_uid PROTO ((void)); | |
1267 | extern int in_sequence_p PROTO ((void)); | |
1268 | extern void force_next_line_note PROTO ((void)); | |
1269 | extern void init_emit PROTO ((void)); | |
1270 | extern void init_emit_once PROTO ((int)); | |
1271 | extern void push_topmost_sequence PROTO ((void)); | |
1272 | extern void pop_topmost_sequence PROTO ((void)); | |
1273 | extern int subreg_realpart_p PROTO ((rtx)); | |
1274 | extern void reverse_comparison PROTO ((rtx)); | |
1275 | extern void set_new_first_and_last_insn PROTO ((rtx, rtx)); | |
1276 | extern void set_new_first_and_last_label_num PROTO ((int, int)); | |
1277 | extern void unshare_all_rtl PROTO ((rtx)); | |
1278 | extern void set_last_insn PROTO ((rtx)); | |
1279 | extern void link_cc0_insns PROTO ((rtx)); | |
1280 | extern void add_insn PROTO ((rtx)); | |
1281 | extern void add_insn_before PROTO ((rtx, rtx)); | |
1282 | extern void add_insn_after PROTO ((rtx, rtx)); | |
1283 | extern void reorder_insns_with_line_notes PROTO ((rtx, rtx, rtx)); | |
1284 | extern void emit_insn_after_with_line_notes PROTO ((rtx, rtx, rtx)); | |
1285 | extern enum rtx_code classify_insn PROTO ((rtx)); | |
1286 | extern rtx emit PROTO ((rtx)); | |
a11759a3 JR |
1287 | /* Query and clear/ restore no_line_numbers. This is used by the |
1288 | switch / case handling in stmt.c to give proper line numbers in | |
1289 | warnings about unreachable code. */ | |
1290 | int force_line_numbers PROTO((void)); | |
1291 | void restore_line_number_status PROTO((int old_value)); | |
ac957f13 JL |
1292 | |
1293 | /* In insn-emit.c */ | |
1294 | extern void add_clobbers PROTO ((rtx, int)); | |
1295 | ||
1296 | /* In combine.c */ | |
1297 | extern void combine_instructions PROTO ((rtx, int)); | |
1298 | extern int extended_count PROTO ((rtx, enum machine_mode, int)); | |
1299 | extern rtx remove_death PROTO ((int, rtx)); | |
1300 | #ifdef BUFSIZ | |
1301 | extern void dump_combine_stats PROTO ((FILE *)); | |
1302 | extern void dump_combine_total_stats PROTO ((FILE *)); | |
1303 | #endif | |
1304 | ||
1305 | /* In sched.c. */ | |
1306 | #ifdef BUFSIZ | |
1307 | extern void schedule_insns PROTO ((FILE *)); | |
1308 | #endif | |
1309 | ||
1310 | /* In print-rtl.c */ | |
1311 | extern void debug_rtx PROTO ((rtx)); | |
1312 | extern void debug_rtx_list PROTO ((rtx, int)); | |
1313 | extern rtx debug_rtx_find PROTO ((rtx, int)); | |
1314 | #ifdef BUFSIZ | |
1315 | extern void print_rtl PROTO ((FILE *, rtx)); | |
d6f4ec51 | 1316 | extern void print_rtl_single PROTO ((FILE *, rtx)); |
ac957f13 JL |
1317 | extern void print_inline_rtx PROTO ((FILE *, rtx, int)); |
1318 | #endif | |
1319 | ||
1320 | /* In loop.c */ | |
1321 | extern void init_loop PROTO ((void)); | |
1322 | #ifdef BUFSIZ | |
1323 | extern void loop_optimize PROTO ((rtx, FILE *, int)); | |
1324 | #endif | |
1325 | extern void record_excess_regs PROTO ((rtx, rtx, rtx *)); | |
1326 | ||
1327 | /* In function.c */ | |
1328 | extern void reposition_prologue_and_epilogue_notes PROTO ((rtx)); | |
1329 | extern void thread_prologue_and_epilogue_insns PROTO ((rtx)); | |
1330 | extern void use_variable PROTO ((rtx)); | |
1331 | extern HOST_WIDE_INT get_frame_size PROTO ((void)); | |
1332 | extern void preserve_rtl_expr_result PROTO ((rtx)); | |
1333 | extern void mark_temp_addr_taken PROTO ((rtx)); | |
1334 | extern void update_temp_slot_address PROTO ((rtx, rtx)); | |
1335 | extern void use_variable_after PROTO ((rtx, rtx)); | |
1336 | ||
1337 | /* In reload.c */ | |
1338 | extern int operands_match_p PROTO ((rtx, rtx)); | |
1339 | extern int safe_from_earlyclobber PROTO ((rtx, rtx)); | |
1340 | extern int strict_memory_address_p PROTO ((enum machine_mode, rtx)); | |
1341 | ||
1342 | /* In recog.c */ | |
1343 | extern int memory_address_p PROTO ((enum machine_mode, rtx)); | |
1344 | extern int constrain_operands PROTO ((int, int)); | |
1345 | extern int mode_dependent_address_p PROTO ((rtx)); | |
1346 | extern void init_recog_no_volatile PROTO ((void)); | |
51723711 | 1347 | extern int offsettable_memref_p PROTO ((rtx)); |
ac957f13 JL |
1348 | extern int offsettable_nonstrict_memref_p PROTO ((rtx)); |
1349 | extern int reg_fits_class_p PROTO ((rtx, register enum reg_class, | |
1350 | int, enum machine_mode)); | |
1351 | extern int check_asm_operands PROTO ((rtx)); | |
1352 | extern int address_operand PROTO ((rtx, enum machine_mode)); | |
1353 | extern int const_int_operand PROTO ((rtx, enum machine_mode)); | |
1354 | extern int const_double_operand PROTO ((rtx, enum machine_mode)); | |
1355 | extern int general_operand PROTO ((rtx, enum machine_mode)); | |
1356 | extern int immediate_operand PROTO ((rtx, enum machine_mode)); | |
1357 | extern int nonimmediate_operand PROTO ((rtx, enum machine_mode)); | |
1358 | extern int memory_operand PROTO ((rtx, enum machine_mode)); | |
1359 | extern int nonmemory_operand PROTO ((rtx, enum machine_mode)); | |
1360 | extern int push_operand PROTO ((rtx, enum machine_mode)); | |
1361 | extern int register_operand PROTO ((rtx, enum machine_mode)); | |
1362 | extern int scratch_operand PROTO ((rtx, enum machine_mode)); | |
1363 | extern int indirect_operand PROTO ((rtx, enum machine_mode)); | |
1364 | extern int mode_independent_operand PROTO ((rtx, enum machine_mode)); | |
1365 | extern int comparison_operator PROTO ((rtx, enum machine_mode)); | |
1366 | extern void init_recog_no_volatile PROTO ((void)); | |
1367 | extern void init_recog PROTO ((void)); | |
1368 | extern int validate_replace_rtx PROTO ((rtx, rtx, rtx)); | |
1369 | extern int offsettable_address_p PROTO ((int, enum machine_mode, rtx)); | |
1370 | extern int next_insn_tests_no_inequality PROTO ((rtx)); | |
1371 | extern int recog_memoized PROTO ((rtx)); | |
1372 | extern int validate_change PROTO ((rtx, rtx *, rtx, int)); | |
1373 | extern int apply_change_group PROTO ((void)); | |
1374 | extern void cancel_changes PROTO ((int)); | |
1375 | extern int num_validated_changes PROTO ((void)); | |
1376 | ||
1377 | /* In insn-recog.c */ | |
1378 | extern int recog PROTO ((rtx, rtx, int *)); | |
1379 | ||
1380 | /* In stmt.c */ | |
487a6e06 | 1381 | extern void expand_null_return PROTO((void)); |
ac957f13 JL |
1382 | extern void emit_jump PROTO ((rtx)); |
1383 | extern int preserve_subexpressions_p PROTO ((void)); | |
1384 | ||
1385 | /* In expr.c */ | |
ac957f13 JL |
1386 | extern void init_expr_once PROTO ((void)); |
1387 | ||
1388 | /* In stupid.c */ | |
1389 | #ifdef BUFSIZ | |
1390 | extern void stupid_life_analysis PROTO ((rtx, int, FILE *)); | |
1391 | #endif | |
1392 | ||
1393 | /* In flow.c */ | |
1394 | extern void allocate_for_life_analysis PROTO ((void)); | |
1395 | #ifdef BUFSIZ | |
1396 | extern void dump_flow_info PROTO ((FILE *)); | |
1397 | #endif | |
1398 | ||
1399 | /* In expmed.c */ | |
1400 | extern void init_expmed PROTO ((void)); | |
1401 | extern void expand_inc PROTO ((rtx, rtx)); | |
1402 | extern void expand_dec PROTO ((rtx, rtx)); | |
1403 | extern rtx expand_mult_highpart PROTO ((enum machine_mode, rtx, | |
1404 | unsigned HOST_WIDE_INT, rtx, | |
1405 | int, int)); | |
1406 | ||
ac957f13 | 1407 | /* In global.c */ |
487a6e06 | 1408 | extern void mark_elimination PROTO ((int, int)); |
ac957f13 JL |
1409 | #ifdef BUFSIZ |
1410 | extern int global_alloc PROTO ((FILE *)); | |
1411 | extern void dump_global_regs PROTO ((FILE *)); | |
1412 | #endif | |
1413 | ||
1414 | /* In regclass.c */ | |
487a6e06 | 1415 | extern int reg_classes_intersect_p PROTO ((enum reg_class, enum reg_class)); |
d6f4ec51 | 1416 | extern int reg_class_subset_p PROTO ((enum reg_class, enum reg_class)); |
ac957f13 JL |
1417 | extern void globalize_reg PROTO ((int)); |
1418 | extern void init_regs PROTO ((void)); | |
1419 | extern void init_reg_sets PROTO ((void)); | |
1420 | extern void regset_release_memory PROTO ((void)); | |
1421 | extern void regclass_init PROTO ((void)); | |
1422 | extern void regclass PROTO ((rtx, int)); | |
1423 | extern void reg_scan PROTO ((rtx, int, int)); | |
1424 | extern void fix_register PROTO ((char *, int, int)); | |
1425 | ||
1426 | /* In optabs.c */ | |
1427 | extern void init_optabs PROTO ((void)); | |
1428 | ||
1429 | /* In local-alloc.c */ | |
1430 | #ifdef BUFSIZ | |
1431 | extern void dump_local_alloc PROTO ((FILE *)); | |
1432 | #endif | |
1433 | extern void local_alloc PROTO ((void)); | |
1434 | ||
1435 | /* In reload1.c */ | |
1436 | extern void reload_cse_regs PROTO ((rtx)); | |
1437 | extern void init_reload PROTO ((void)); | |
1438 | extern void mark_home_live PROTO ((int)); | |
1439 | #ifdef BUFSIZ | |
1440 | extern int reload PROTO ((rtx, int, FILE *)); | |
1441 | #endif | |
1442 | ||
1443 | /* In caller-save.c */ | |
1444 | extern void init_caller_save PROTO ((void)); | |
1445 | ||
1446 | /* In profile.c */ | |
1447 | extern void init_branch_prob PROTO ((char *)); | |
d6f4ec51 | 1448 | extern void output_func_start_profiler PROTO ((void)); |
ac957f13 JL |
1449 | |
1450 | /* In reg-stack.c */ | |
1451 | #ifdef BUFSIZ | |
1452 | extern void reg_to_stack PROTO ((rtx, FILE *)); | |
1453 | #endif | |
1454 | extern int stack_regs_mentioned_p PROTO ((rtx)); | |
1455 | ||
1456 | /* In fold-const.c */ | |
1457 | extern int add_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT, | |
1458 | HOST_WIDE_INT, HOST_WIDE_INT, | |
1459 | HOST_WIDE_INT *, HOST_WIDE_INT *)); | |
1460 | extern int neg_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT, | |
1461 | HOST_WIDE_INT *, HOST_WIDE_INT *)); | |
1462 | extern int mul_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT, | |
1463 | HOST_WIDE_INT, HOST_WIDE_INT, | |
1464 | HOST_WIDE_INT *, HOST_WIDE_INT *)); | |
1465 | extern void lshift_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT, | |
1466 | HOST_WIDE_INT, int, HOST_WIDE_INT *, | |
1467 | HOST_WIDE_INT *, int)); | |
1468 | extern void rshift_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT, | |
1469 | HOST_WIDE_INT, int, | |
1470 | HOST_WIDE_INT *, HOST_WIDE_INT *, int)); | |
1471 | extern void lrotate_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT, | |
1472 | HOST_WIDE_INT, int, HOST_WIDE_INT *, | |
1473 | HOST_WIDE_INT *)); | |
1474 | extern void rrotate_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT, | |
1475 | HOST_WIDE_INT, int, HOST_WIDE_INT *, | |
1476 | HOST_WIDE_INT *)); | |
1477 | ||
1478 | /* In calls.c */ | |
1479 | /* Emit library call. */ | |
1480 | extern void emit_library_call PVPROTO ((rtx, int, enum machine_mode, | |
1481 | int, ...)); | |
1482 | extern rtx emit_library_call_value PVPROTO((rtx, rtx, int, | |
1483 | enum machine_mode, | |
1484 | int, ...)); | |
1485 | ||
1486 | /* In unroll.c */ | |
1487 | extern int set_dominates_use PROTO ((int, int, int, rtx, rtx)); | |
1488 | ||
1489 | /* In varasm.c */ | |
1490 | extern void bss_section PROTO ((void)); | |
1491 | extern int in_data_section PROTO ((void)); | |
1492 | extern int supports_one_only PROTO ((void)); | |
1493 | ||
1494 | /* In rtl.c */ | |
1495 | extern void init_rtl PROTO ((void)); | |
1496 | extern void rtx_free PROTO ((rtx)); | |
1497 | ||
1498 | /* In alias.c */ | |
1499 | extern int true_dependence PROTO ((rtx, enum machine_mode, rtx, | |
1500 | int (*)(rtx))); | |
1501 | extern int read_dependence PROTO ((rtx, rtx)); | |
1502 | extern int anti_dependence PROTO ((rtx, rtx)); | |
1503 | extern int output_dependence PROTO ((rtx, rtx)); | |
6e73e666 | 1504 | extern void init_alias_once PROTO ((void)); |
ac957f13 JL |
1505 | extern void init_alias_analysis PROTO ((void)); |
1506 | extern void end_alias_analysis PROTO ((void)); | |
1507 | ||
de12be17 JC |
1508 | extern void record_base_value PROTO ((int, rtx, int)); |
1509 | ||
ac957f13 | 1510 | #endif /* _RTL_H */ |