rtl.h revision 52284
1/* Register Transfer Language (RTL) definitions for GNU C-Compiler 2 Copyright (C) 1987, 91-98, 1999 Free Software Foundation, Inc. 3 4This file is part of GNU CC. 5 6GNU CC is free software; you can redistribute it and/or modify 7it under the terms of the GNU General Public License as published by 8the Free Software Foundation; either version 2, or (at your option) 9any later version. 10 11GNU CC is distributed in the hope that it will be useful, 12but WITHOUT ANY WARRANTY; without even the implied warranty of 13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14GNU General Public License for more details. 15 16You should have received a copy of the GNU General Public License 17along with GNU CC; see the file COPYING. If not, write to 18the Free Software Foundation, 59 Temple Place - Suite 330, 19Boston, MA 02111-1307, USA. */ 20 21#ifndef _RTL_H 22#define _RTL_H 23 24#include "machmode.h" 25 26#undef FFS /* Some systems predefine this symbol; don't let it interfere. */ 27#undef FLOAT /* Likewise. */ 28#undef ABS /* Likewise. */ 29#undef PC /* Likewise. */ 30 31#ifndef TREE_CODE 32union tree_node; 33#endif 34 35/* Register Transfer Language EXPRESSIONS CODES */ 36 37#define RTX_CODE enum rtx_code 38enum 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 44 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for 45 NUM_RTX_CODE. 46 Assumes default enum value assignment. */ 47 48#define NUM_RTX_CODE ((int)LAST_AND_UNUSED_RTX_CODE) 49 /* The cast here, saves many elsewhere. */ 50 51extern int rtx_length[]; 52#define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)]) 53 54extern char *rtx_name[]; 55#define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)]) 56 57extern char *rtx_format[]; 58#define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)]) 59 60extern char rtx_class[]; 61#define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)]) 62 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. */ 65typedef 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 81/* Common union for an element of an rtx. */ 82 83typedef union rtunion_def 84{ 85 HOST_WIDE_INT rtwint; 86 int rtint; 87 char *rtstr; 88 struct rtx_def *rtx; 89 struct rtvec_def *rtvec; 90 enum machine_mode rttype; 91 addr_diff_vec_flags rt_addr_diff_vec_flags; 92 struct bitmap_head_def *rtbit; 93 union tree_node *rttree; 94 struct basic_block_def *bb; 95} rtunion; 96 97/* RTL expression ("rtx"). */ 98 99typedef struct rtx_def 100{ 101#ifdef ONLY_INT_FIELDS 102#ifdef CODE_FIELD_BUG 103 unsigned int code : 16; 104#else 105 unsigned short code; 106#endif 107#else 108 /* The kind of expression this is. */ 109 enum rtx_code code : 16; 110#endif 111 /* The kind of value the expression has. */ 112#ifdef ONLY_INT_FIELDS 113 int mode : 8; 114#else 115 enum machine_mode mode : 8; 116#endif 117 /* LINK_COST_ZERO in an INSN_LIST. */ 118 unsigned int jump : 1; 119 /* LINK_COST_FREE in an INSN_LIST. */ 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. 124 1 in a SUBREG if it is from a promoted variable that is unsigned. 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. 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. */ 138 unsigned int volatil : 1; 139 /* 1 in a MEM referring to a field of an aggregate. 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. 143 1 in a SUBREG expression if was generated from a variable with a 144 promoted mode. 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 150 together with the preceding insn. Valid only within sched. 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; 166 /* 1 in an INSN or a SET if this rtx is related to the call frame, 167 either changing how we compute the frame address or saving and 168 restoring registers in the prologue and epilogue. 169 1 in a MEM if the MEM refers to a scalar, rather than a member of 170 an aggregate. */ 171 unsigned frame_related : 1; 172 /* The first element of the operands of this rtx. 173 The number of operands and their types are controlled 174 by the `code' field, according to rtl.def. */ 175 rtunion fld[1]; 176} *rtx; 177 178#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) 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 201typedef struct rtvec_def{ 202 int num_elem; /* number of elements */ 203 rtunion 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#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 || GET_CODE (X) == CONSTANT_P_RTX) 224 225/* General accessor macros for accessing the fields of an rtx. */ 226 227#define XEXP(RTX, N) ((RTX)->fld[N].rtx) 228#define XINT(RTX, N) ((RTX)->fld[N].rtint) 229#define XWINT(RTX, N) ((RTX)->fld[N].rtwint) 230#define XSTR(RTX, N) ((RTX)->fld[N].rtstr) 231#define XVEC(RTX, N) ((RTX)->fld[N].rtvec) 232#define XVECLEN(RTX, N) ((RTX)->fld[N].rtvec->num_elem) 233#define XVECEXP(RTX,N,M)((RTX)->fld[N].rtvec->elem[M].rtx) 234#define XBITMAP(RTX, N) ((RTX)->fld[N].rtbit) 235#define XTREE(RTX, N) ((RTX)->fld[N].rttree) 236 237 238/* ACCESS MACROS for particular fields of insns. */ 239 240/* Holds a unique number for each insn. 241 These are not necessarily sequentially increasing. */ 242#define INSN_UID(INSN) ((INSN)->fld[0].rtint) 243 244/* Chain insns together in sequence. */ 245#define PREV_INSN(INSN) ((INSN)->fld[1].rtx) 246#define NEXT_INSN(INSN) ((INSN)->fld[2].rtx) 247 248/* The body of an insn. */ 249#define PATTERN(INSN) ((INSN)->fld[3].rtx) 250 251/* Code number of instruction, from when it was recognized. 252 -1 means this instruction has not been recognized yet. */ 253#define INSN_CODE(INSN) ((INSN)->fld[4].rtint) 254 255/* Set up in flow.c; empty before then. 256 Holds a chain of INSN_LIST rtx's whose first operands point at 257 previous insns with direct data-flow connections to this one. 258 That means that those insns set variables whose next use is in this insn. 259 They are always in the same basic block as this insn. */ 260#define LOG_LINKS(INSN) ((INSN)->fld[5].rtx) 261 262/* 1 if insn has been deleted. */ 263#define INSN_DELETED_P(INSN) ((INSN)->volatil) 264 265/* 1 if insn is a call to a const function. */ 266#define CONST_CALL_P(INSN) ((INSN)->unchanging) 267 268/* 1 if insn is a branch that should not unconditionally execute its 269 delay slots, i.e., it is an annulled branch. */ 270#define INSN_ANNULLED_BRANCH_P(INSN) ((INSN)->unchanging) 271 272/* 1 if insn is in a delay slot and is from the target of the branch. If 273 the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be 274 executed if the branch is taken. For annulled branches with this bit 275 clear, the insn should be executed only if the branch is not taken. */ 276#define INSN_FROM_TARGET_P(INSN) ((INSN)->in_struct) 277 278/* Holds a list of notes on what this insn does to various REGs. 279 It is a chain of EXPR_LIST rtx's, where the second operand 280 is the chain pointer and the first operand is the REG being described. 281 The mode field of the EXPR_LIST contains not a real machine mode 282 but a value that says what this note says about the REG: 283 REG_DEAD means that the value in REG dies in this insn (i.e., it is 284 not needed past this insn). If REG is set in this insn, the REG_DEAD 285 note may, but need not, be omitted. 286 REG_INC means that the REG is autoincremented or autodecremented. 287 REG_EQUIV describes the insn as a whole; it says that the insn 288 sets a register to a constant value or to be equivalent to a memory 289 address. If the register is spilled to the stack then the constant 290 value should be substituted for it. The contents of the REG_EQUIV 291 is the constant value or memory address, which may be different 292 from the source of the SET although it has the same value. A 293 REG_EQUIV note may also appear on an insn which copies a register 294 parameter to a pseudo-register, if there is a memory address which 295 could be used to hold that pseudo-register throughout the function. 296 REG_EQUAL is like REG_EQUIV except that the destination 297 is only momentarily equal to the specified rtx. Therefore, it 298 cannot be used for substitution; but it can be used for cse. 299 REG_RETVAL means that this insn copies the return-value of 300 a library call out of the hard reg for return values. This note 301 is actually an INSN_LIST and it points to the first insn involved 302 in setting up arguments for the call. flow.c uses this to delete 303 the entire library call when its result is dead. 304 REG_LIBCALL is the inverse of REG_RETVAL: it goes on the first insn 305 of the library call and points at the one that has the REG_RETVAL. 306 REG_WAS_0 says that the register set in this insn held 0 before the insn. 307 The contents of the note is the insn that stored the 0. 308 If that insn is deleted or patched to a NOTE, the REG_WAS_0 is inoperative. 309 The REG_WAS_0 note is actually an INSN_LIST, not an EXPR_LIST. 310 REG_NONNEG means that the register is always nonnegative during 311 the containing loop. This is used in branches so that decrement and 312 branch instructions terminating on zero can be matched. There must be 313 an insn pattern in the md file named `decrement_and_branch_until_zero' 314 or else this will never be added to any instructions. 315 REG_NO_CONFLICT means there is no conflict *after this insn* 316 between the register in the note and the destination of this insn. 317 REG_UNUSED identifies a register set in this insn and never used. 318 REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use 319 CC0, respectively. Normally, these are required to be consecutive insns, 320 but we permit putting a cc0-setting insn in the delay slot of a branch 321 as long as only one copy of the insn exists. In that case, these notes 322 point from one to the other to allow code generation to determine what 323 any require information and to properly update CC_STATUS. 324 REG_LABEL points to a CODE_LABEL. Used by non-JUMP_INSNs to 325 say that the CODE_LABEL contained in the REG_LABEL note is used 326 by the insn. 327 REG_DEP_ANTI is used in LOG_LINKS which represent anti (write after read) 328 dependencies. REG_DEP_OUTPUT is used in LOG_LINKS which represent output 329 (write after write) dependencies. Data dependencies, which are the only 330 type of LOG_LINK created by flow, are represented by a 0 reg note kind. */ 331/* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs when the flag 332 -fbranch-probabilities is given. It has an integer value. For jumps, 333 it is the probability that this is a taken branch. For calls, it is the 334 probability that this call won't return. 335 REG_EXEC_COUNT is attached to the first insn of each basic block, and 336 the first insn after each CALL_INSN. It indicates how many times this 337 block was executed. 338 REG_SAVE_AREA is used to optimize rtl generated by dynamic stack 339 allocations for targets where SETJMP_VIA_SAVE_AREA is true. 340 REG_BR_PRED is attached to JUMP_INSNs only, it holds the branch prediction 341 flags computed by get_jump_flags() after dbr scheduling is complete. 342 REG_FRAME_RELATED_EXPR is attached to insns that are RTX_FRAME_RELATED_P, 343 but are too complex for DWARF to interpret what they imply. The attached 344 rtx is used instead of intuition. */ 345/* REG_EH_REGION is used to indicate what exception region an INSN 346 belongs in. This can be used to indicate what region a call may throw 347 to. A REGION of 0 indicates that a call cannot throw at all. 348 A REGION of -1 indicates that it cannot throw, nor will it execute 349 a non-local goto. 350 REG_EH_RETHROW is used to indicate what that a call is actually a 351 call to rethrow, and specifies which region the rethrow is targetting. 352 This provides a way to generate the non standard flow edges required 353 for a rethrow. */ 354 355 356#define REG_NOTES(INSN) ((INSN)->fld[6].rtx) 357 358#define ADDR_DIFF_VEC_FLAGS(RTX) ((RTX)->fld[4].rt_addr_diff_vec_flags) 359 360/* Don't forget to change reg_note_name in rtl.c. */ 361enum reg_note { REG_DEAD = 1, REG_INC = 2, REG_EQUIV = 3, REG_WAS_0 = 4, 362 REG_EQUAL = 5, REG_RETVAL = 6, REG_LIBCALL = 7, 363 REG_NONNEG = 8, REG_NO_CONFLICT = 9, REG_UNUSED = 10, 364 REG_CC_SETTER = 11, REG_CC_USER = 12, REG_LABEL = 13, 365 REG_DEP_ANTI = 14, REG_DEP_OUTPUT = 15, REG_BR_PROB = 16, 366 REG_EXEC_COUNT = 17, REG_NOALIAS = 18, REG_SAVE_AREA = 19, 367 REG_BR_PRED = 20, REG_EH_CONTEXT = 21, 368 REG_FRAME_RELATED_EXPR = 22, REG_EH_REGION = 23, 369 REG_EH_RETHROW = 24 }; 370/* The base value for branch probability notes. */ 371#define REG_BR_PROB_BASE 10000 372 373/* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */ 374#define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK)) 375#define PUT_REG_NOTE_KIND(LINK,KIND) PUT_MODE(LINK, (enum machine_mode) (KIND)) 376 377/* Names for REG_NOTE's in EXPR_LIST insn's. */ 378 379extern char *reg_note_name[]; 380#define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)]) 381 382/* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of 383 USE and CLOBBER expressions. 384 USE expressions list the registers filled with arguments that 385 are passed to the function. 386 CLOBBER expressions document the registers explicitly clobbered 387 by this CALL_INSN. 388 Pseudo registers can not be mentioned in this list. */ 389#define CALL_INSN_FUNCTION_USAGE(INSN) ((INSN)->fld[7].rtx) 390 391/* The label-number of a code-label. The assembler label 392 is made from `L' and the label-number printed in decimal. 393 Label numbers are unique in a compilation. */ 394#define CODE_LABEL_NUMBER(INSN) ((INSN)->fld[3].rtint) 395 396#define LINE_NUMBER NOTE 397 398/* In a NOTE that is a line number, this is a string for the file name that the 399 line is in. We use the same field to record block numbers temporarily in 400 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts 401 between ints and pointers if we use a different macro for the block number.) 402 The NOTE_INSN_RANGE_{START,END} and NOTE_INSN_LIVE notes record their 403 information as a rtx in the field. */ 404 405#define NOTE_SOURCE_FILE(INSN) ((INSN)->fld[3].rtstr) 406#define NOTE_BLOCK_NUMBER(INSN) ((INSN)->fld[3].rtint) 407#define NOTE_RANGE_INFO(INSN) ((INSN)->fld[3].rtx) 408#define NOTE_LIVE_INFO(INSN) ((INSN)->fld[3].rtx) 409#define NOTE_BASIC_BLOCK(INSN) ((INSN)->fld[3].bb) 410 411/* If the NOTE_BLOCK_NUMBER field gets a -1, it means create a new 412 block node for a live range block. */ 413#define NOTE_BLOCK_LIVE_RANGE_BLOCK -1 414 415/* In a NOTE that is a line number, this is the line number. 416 Other kinds of NOTEs are identified by negative numbers here. */ 417#define NOTE_LINE_NUMBER(INSN) ((INSN)->fld[4].rtint) 418 419/* Codes that appear in the NOTE_LINE_NUMBER field 420 for kinds of notes that are not line numbers. 421 422 Notice that we do not try to use zero here for any of 423 the special note codes because sometimes the source line 424 actually can be zero! This happens (for example) when we 425 are generating code for the per-translation-unit constructor 426 and destructor routines for some C++ translation unit. 427 428 If you should change any of the following values, or if you 429 should add a new value here, don't forget to change the 430 note_insn_name array in rtl.c. */ 431 432/* This note is used to get rid of an insn 433 when it isn't safe to patch the insn out of the chain. */ 434#define NOTE_INSN_DELETED -1 435#define NOTE_INSN_BLOCK_BEG -2 436#define NOTE_INSN_BLOCK_END -3 437#define NOTE_INSN_LOOP_BEG -4 438#define NOTE_INSN_LOOP_END -5 439/* This kind of note is generated at the end of the function body, 440 just before the return insn or return label. 441 In an optimizing compilation it is deleted by the first jump optimization, 442 after enabling that optimizer to determine whether control can fall 443 off the end of the function body without a return statement. */ 444#define NOTE_INSN_FUNCTION_END -6 445/* This kind of note is generated just after each call to `setjmp', et al. */ 446#define NOTE_INSN_SETJMP -7 447/* Generated at the place in a loop that `continue' jumps to. */ 448#define NOTE_INSN_LOOP_CONT -8 449/* Generated at the start of a duplicated exit test. */ 450#define NOTE_INSN_LOOP_VTOP -9 451/* This marks the point immediately after the last prologue insn. */ 452#define NOTE_INSN_PROLOGUE_END -10 453/* This marks the point immediately prior to the first epilogue insn. */ 454#define NOTE_INSN_EPILOGUE_BEG -11 455/* Generated in place of user-declared labels when they are deleted. */ 456#define NOTE_INSN_DELETED_LABEL -12 457/* This note indicates the start of the real body of the function, 458 i.e. the point just after all of the parms have been moved into 459 their homes, etc. */ 460#define NOTE_INSN_FUNCTION_BEG -13 461/* These note where exception handling regions begin and end. */ 462#define NOTE_INSN_EH_REGION_BEG -14 463#define NOTE_INSN_EH_REGION_END -15 464/* Generated whenever a duplicate line number note is output. For example, 465 one is output after the end of an inline function, in order to prevent 466 the line containing the inline call from being counted twice in gcov. */ 467#define NOTE_REPEATED_LINE_NUMBER -16 468 469/* Start/end of a live range region, where pseudos allocated on the stack can 470 be allocated to temporary registers. */ 471#define NOTE_INSN_RANGE_START -17 472#define NOTE_INSN_RANGE_END -18 473/* Record which registers are currently live. */ 474#define NOTE_INSN_LIVE -19 475/* Record the struct for the following basic block. */ 476#define NOTE_INSN_BASIC_BLOCK -20 477 478#if 0 /* These are not used, and I don't know what they were for. --rms. */ 479#define NOTE_DECL_NAME(INSN) ((INSN)->fld[3].rtstr) 480#define NOTE_DECL_CODE(INSN) ((INSN)->fld[4].rtint) 481#define NOTE_DECL_RTL(INSN) ((INSN)->fld[5].rtx) 482#define NOTE_DECL_IDENTIFIER(INSN) ((INSN)->fld[6].rtint) 483#define NOTE_DECL_TYPE(INSN) ((INSN)->fld[7].rtint) 484#endif /* 0 */ 485 486/* Names for NOTE insn's other than line numbers. */ 487 488extern char *note_insn_name[]; 489#define GET_NOTE_INSN_NAME(NOTE_CODE) (note_insn_name[-(NOTE_CODE)]) 490 491/* The name of a label, in case it corresponds to an explicit label 492 in the input source code. */ 493#define LABEL_NAME(LABEL) ((LABEL)->fld[4].rtstr) 494 495/* In jump.c, each label contains a count of the number 496 of LABEL_REFs that point at it, so unused labels can be deleted. */ 497#define LABEL_NUSES(LABEL) ((LABEL)->fld[5].rtint) 498 499/* The original regno this ADDRESSOF was built for. */ 500#define ADDRESSOF_REGNO(RTX) ((RTX)->fld[1].rtint) 501 502/* The variable in the register we took the address of. */ 503#define ADDRESSOF_DECL(X) ((tree) XEXP ((X), 2)) 504#define SET_ADDRESSOF_DECL(X, T) (XEXP ((X), 2) = (rtx) (T)) 505 506/* In jump.c, each JUMP_INSN can point to a label that it can jump to, 507 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can 508 be decremented and possibly the label can be deleted. */ 509#define JUMP_LABEL(INSN) ((INSN)->fld[7].rtx) 510 511/* Once basic blocks are found in flow.c, 512 each CODE_LABEL starts a chain that goes through 513 all the LABEL_REFs that jump to that label. 514 The chain eventually winds up at the CODE_LABEL; it is circular. */ 515#define LABEL_REFS(LABEL) ((LABEL)->fld[6].rtx) 516 517/* This is the field in the LABEL_REF through which the circular chain 518 of references to a particular label is linked. 519 This chain is set up in flow.c. */ 520 521#define LABEL_NEXTREF(REF) ((REF)->fld[1].rtx) 522 523/* Once basic blocks are found in flow.c, 524 Each LABEL_REF points to its containing instruction with this field. */ 525 526#define CONTAINING_INSN(RTX) ((RTX)->fld[2].rtx) 527 528/* For a REG rtx, REGNO extracts the register number. */ 529 530#define REGNO(RTX) ((RTX)->fld[0].rtint) 531 532/* For a REG rtx, REG_FUNCTION_VALUE_P is nonzero if the reg 533 is the current function's return value. */ 534 535#define REG_FUNCTION_VALUE_P(RTX) ((RTX)->integrated) 536 537/* 1 in a REG rtx if it corresponds to a variable declared by the user. */ 538#define REG_USERVAR_P(RTX) ((RTX)->volatil) 539 540/* For a CONST_INT rtx, INTVAL extracts the integer. */ 541 542#define INTVAL(RTX) ((RTX)->fld[0].rtwint) 543 544/* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of. 545 SUBREG_WORD extracts the word-number. */ 546 547#define SUBREG_REG(RTX) ((RTX)->fld[0].rtx) 548#define SUBREG_WORD(RTX) ((RTX)->fld[1].rtint) 549 550/* 1 if the REG contained in SUBREG_REG is already known to be 551 sign- or zero-extended from the mode of the SUBREG to the mode of 552 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the 553 extension. 554 555 When used as a LHS, is means that this extension must be done 556 when assigning to SUBREG_REG. */ 557 558#define SUBREG_PROMOTED_VAR_P(RTX) ((RTX)->in_struct) 559#define SUBREG_PROMOTED_UNSIGNED_P(RTX) ((RTX)->unchanging) 560 561/* Access various components of an ASM_OPERANDS rtx. */ 562 563#define ASM_OPERANDS_TEMPLATE(RTX) XSTR ((RTX), 0) 564#define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XSTR ((RTX), 1) 565#define ASM_OPERANDS_OUTPUT_IDX(RTX) XINT ((RTX), 2) 566#define ASM_OPERANDS_INPUT_VEC(RTX) XVEC ((RTX), 3) 567#define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XVEC ((RTX), 4) 568#define ASM_OPERANDS_INPUT(RTX, N) XVECEXP ((RTX), 3, (N)) 569#define ASM_OPERANDS_INPUT_LENGTH(RTX) XVECLEN ((RTX), 3) 570#define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) XSTR (XVECEXP ((RTX), 4, (N)), 0) 571#define ASM_OPERANDS_INPUT_MODE(RTX, N) GET_MODE (XVECEXP ((RTX), 4, (N))) 572#define ASM_OPERANDS_SOURCE_FILE(RTX) XSTR ((RTX), 5) 573#define ASM_OPERANDS_SOURCE_LINE(RTX) XINT ((RTX), 6) 574 575/* For a MEM rtx, 1 if it's a volatile reference. 576 Also in an ASM_OPERANDS rtx. */ 577#define MEM_VOLATILE_P(RTX) ((RTX)->volatil) 578 579/* For a MEM rtx, 1 if it refers to a field of an aggregate. If zero, 580 RTX may or may not refer to a field of an aggregate. */ 581#define MEM_IN_STRUCT_P(RTX) ((RTX)->in_struct) 582 583/* For a MEM rtx, 1 if it refers to a scalar. If zero, RTX may or may 584 not refer to a scalar.*/ 585#define MEM_SCALAR_P(RTX) ((RTX)->frame_related) 586 587/* Copy the MEM_VOLATILE_P, MEM_IN_STRUCT_P, and MEM_SCALAR_P 588 attributes from RHS to LHS. */ 589#define MEM_COPY_ATTRIBUTES(LHS, RHS) \ 590 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \ 591 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \ 592 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS)) 593 594/* If VAL is non-zero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in 595 RTX. Otherwise, vice versa. Use this macro only when you are 596 *sure* that you know that the MEM is in a structure, or is a 597 scalar. VAL is evaluated only once. */ 598#define MEM_SET_IN_STRUCT_P(RTX, VAL) \ 599 ((VAL) ? (MEM_IN_STRUCT_P (RTX) = 1, MEM_SCALAR_P (RTX) = 0) \ 600 : (MEM_IN_STRUCT_P (RTX) = 0, MEM_SCALAR_P (RTX) = 1)) 601 602/* For a MEM rtx, the alias set. If 0, this MEM is not in any alias 603 set, and may alias anything. Otherwise, the MEM can only alias 604 MEMs in the same alias set. This value is set in a 605 language-dependent manner in the front-end, and should not be 606 altered in the back-end. These set numbers are tested for zero, 607 and compared for equality; they have no other significance. In 608 some front-ends, these numbers may correspond in some way to types, 609 or other language-level entities, but they need not, and the 610 back-end makes no such assumptions. */ 611#define MEM_ALIAS_SET(RTX) (XINT (RTX, 1)) 612 613/* For a LABEL_REF, 1 means that this reference is to a label outside the 614 loop containing the reference. */ 615#define LABEL_OUTSIDE_LOOP_P(RTX) ((RTX)->in_struct) 616 617/* For a LABEL_REF, 1 means it is for a nonlocal label. */ 618/* Likewise in an EXPR_LIST for a REG_LABEL note. */ 619#define LABEL_REF_NONLOCAL_P(RTX) ((RTX)->volatil) 620 621/* For a CODE_LABEL, 1 means always consider this label to be needed. */ 622#define LABEL_PRESERVE_P(RTX) ((RTX)->in_struct) 623 624/* For a REG, 1 means the register is used only in an exit test of a loop. */ 625#define REG_LOOP_TEST_P(RTX) ((RTX)->in_struct) 626 627/* During sched, for an insn, 1 means that the insn must be scheduled together 628 with the preceding insn. */ 629#define SCHED_GROUP_P(INSN) ((INSN)->in_struct) 630 631/* During sched, for the LOG_LINKS of an insn, these cache the adjusted 632 cost of the dependence link. The cost of executing an instruction 633 may vary based on how the results are used. LINK_COST_ZERO is 1 when 634 the cost through the link varies and is unchanged (i.e., the link has 635 zero additional cost). LINK_COST_FREE is 1 when the cost through the 636 link is zero (i.e., the link makes the cost free). In other cases, 637 the adjustment to the cost is recomputed each time it is needed. */ 638#define LINK_COST_ZERO(X) ((X)->jump) 639#define LINK_COST_FREE(X) ((X)->call) 640 641/* For a SET rtx, SET_DEST is the place that is set 642 and SET_SRC is the value it is set to. */ 643#define SET_DEST(RTX) ((RTX)->fld[0].rtx) 644#define SET_SRC(RTX) ((RTX)->fld[1].rtx) 645 646/* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */ 647#define TRAP_CONDITION(RTX) ((RTX)->fld[0].rtx) 648#define TRAP_CODE(RTX) (RTX)->fld[1].rtx 649 650/* 1 in a SYMBOL_REF if it addresses this function's constants pool. */ 651#define CONSTANT_POOL_ADDRESS_P(RTX) ((RTX)->unchanging) 652 653/* Flag in a SYMBOL_REF for machine-specific purposes. */ 654#define SYMBOL_REF_FLAG(RTX) ((RTX)->volatil) 655 656/* 1 in a SYMBOL_REF if it represents a symbol which might have to change 657 if its inlined or unrolled. */ 658#define SYMBOL_REF_NEED_ADJUST(RTX) ((RTX)->in_struct) 659 660/* 1 means a SYMBOL_REF has been the library function in emit_library_call. */ 661#define SYMBOL_REF_USED(RTX) ((RTX)->used) 662 663/* For an INLINE_HEADER rtx, FIRST_FUNCTION_INSN is the first insn 664 of the function that is not involved in copying parameters to 665 pseudo-registers. FIRST_PARM_INSN is the very first insn of 666 the function, including the parameter copying. 667 We keep this around in case we must splice 668 this function into the assembly code at the end of the file. 669 FIRST_LABELNO is the first label number used by the function (inclusive). 670 LAST_LABELNO is the last label used by the function (exclusive). 671 MAX_REGNUM is the largest pseudo-register used by that function. 672 FUNCTION_ARGS_SIZE is the size of the argument block in the stack. 673 POPS_ARGS is the number of bytes of input arguments popped by the function 674 STACK_SLOT_LIST is the list of stack slots. 675 FORCED_LABELS is the list of labels whose address was taken. 676 FUNCTION_FLAGS are where single-bit flags are saved. 677 OUTGOING_ARGS_SIZE is the size of the largest outgoing stack parameter list. 678 ORIGINAL_ARG_VECTOR is a vector of the original DECL_RTX values 679 for the function arguments. 680 ORIGINAL_DECL_INITIAL is a pointer to the original DECL_INITIAL for the 681 function. 682 INLINE_REGNO_REG_RTX, INLINE_REGNO_POINTER_FLAG, and 683 INLINE_REGNO_POINTER_ALIGN are pointers to the corresponding arrays. 684 685 We want this to lay down like an INSN. The PREV_INSN field 686 is always NULL. The NEXT_INSN field always points to the 687 first function insn of the function being squirreled away. */ 688 689#define FIRST_FUNCTION_INSN(RTX) ((RTX)->fld[2].rtx) 690#define FIRST_PARM_INSN(RTX) ((RTX)->fld[3].rtx) 691#define FIRST_LABELNO(RTX) ((RTX)->fld[4].rtint) 692#define LAST_LABELNO(RTX) ((RTX)->fld[5].rtint) 693#define MAX_PARMREG(RTX) ((RTX)->fld[6].rtint) 694#define MAX_REGNUM(RTX) ((RTX)->fld[7].rtint) 695#define FUNCTION_ARGS_SIZE(RTX) ((RTX)->fld[8].rtint) 696#define POPS_ARGS(RTX) ((RTX)->fld[9].rtint) 697#define STACK_SLOT_LIST(RTX) ((RTX)->fld[10].rtx) 698#define FORCED_LABELS(RTX) ((RTX)->fld[11].rtx) 699#define FUNCTION_FLAGS(RTX) ((RTX)->fld[12].rtint) 700#define OUTGOING_ARGS_SIZE(RTX) ((RTX)->fld[13].rtint) 701#define ORIGINAL_ARG_VECTOR(RTX) ((RTX)->fld[14].rtvec) 702#define ORIGINAL_DECL_INITIAL(RTX) ((RTX)->fld[15].rtx) 703#define INLINE_REGNO_REG_RTX(RTX) ((RTX)->fld[16].rtvec) 704#define INLINE_REGNO_POINTER_FLAG(RTX) ((RTX)->fld[17].rtstr) 705#define INLINE_REGNO_POINTER_ALIGN(RTX) ((RTX)->fld[18].rtstr) 706#define PARMREG_STACK_LOC(RTX) ((RTX)->fld[19].rtvec) 707 708/* In FUNCTION_FLAGS we save some variables computed when emitting the code 709 for the function and which must be `or'ed into the current flag values when 710 insns from that function are being inlined. */ 711 712/* These ought to be an enum, but non-ANSI compilers don't like that. */ 713#define FUNCTION_FLAGS_CALLS_ALLOCA 01 714#define FUNCTION_FLAGS_CALLS_SETJMP 02 715#define FUNCTION_FLAGS_RETURNS_STRUCT 04 716#define FUNCTION_FLAGS_RETURNS_PCC_STRUCT 010 717#define FUNCTION_FLAGS_NEEDS_CONTEXT 020 718#define FUNCTION_FLAGS_HAS_NONLOCAL_LABEL 040 719#define FUNCTION_FLAGS_RETURNS_POINTER 0100 720#define FUNCTION_FLAGS_USES_CONST_POOL 0200 721#define FUNCTION_FLAGS_CALLS_LONGJMP 0400 722#define FUNCTION_FLAGS_USES_PIC_OFFSET_TABLE 01000 723#define FUNCTION_FLAGS_HAS_COMPUTED_JUMP 02000 724 725/* Define a macro to look for REG_INC notes, 726 but save time on machines where they never exist. */ 727 728/* Don't continue this line--convex cc version 4.1 would lose. */ 729#if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT)) 730#define FIND_REG_INC_NOTE(insn, reg) (find_reg_note ((insn), REG_INC, (reg))) 731#else 732#define FIND_REG_INC_NOTE(insn, reg) 0 733#endif 734 735/* Indicate whether the machine has any sort of auto increment addressing. 736 If not, we can avoid checking for REG_INC notes. */ 737 738/* Don't continue this line--convex cc version 4.1 would lose. */ 739#if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT)) 740#define AUTO_INC_DEC 741#endif 742 743#ifndef HAVE_PRE_INCREMENT 744#define HAVE_PRE_INCREMENT 0 745#endif 746 747#ifndef HAVE_PRE_DECREMENT 748#define HAVE_PRE_DECREMENT 0 749#endif 750 751#ifndef HAVE_POST_INCREMENT 752#define HAVE_POST_INCREMENT 0 753#endif 754 755#ifndef HAVE_POST_DECREMENT 756#define HAVE_POST_DECREMENT 0 757#endif 758 759 760/* Some architectures do not have complete pre/post increment/decrement 761 instruction sets, or only move some modes efficiently. These macros 762 allow us to tune autoincrement generation. */ 763 764#ifndef USE_LOAD_POST_INCREMENT 765#define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT 766#endif 767 768#ifndef USE_LOAD_POST_DECREMENT 769#define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT 770#endif 771 772#ifndef USE_LOAD_PRE_INCREMENT 773#define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT 774#endif 775 776#ifndef USE_LOAD_PRE_DECREMENT 777#define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT 778#endif 779 780#ifndef USE_STORE_POST_INCREMENT 781#define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT 782#endif 783 784#ifndef USE_STORE_POST_DECREMENT 785#define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT 786#endif 787 788#ifndef USE_STORE_PRE_INCREMENT 789#define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT 790#endif 791 792#ifndef USE_STORE_PRE_DECREMENT 793#define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT 794#endif 795 796 797/* Accessors for RANGE_INFO. */ 798/* For RANGE_{START,END} notes return the RANGE_START note. */ 799#define RANGE_INFO_NOTE_START(INSN) (XEXP (INSN, 0)) 800 801/* For RANGE_{START,END} notes return the RANGE_START note. */ 802#define RANGE_INFO_NOTE_END(INSN) (XEXP (INSN, 1)) 803 804/* For RANGE_{START,END} notes, return the vector containing the registers used 805 in the range. */ 806#define RANGE_INFO_REGS(INSN) (XVEC (INSN, 2)) 807#define RANGE_INFO_REGS_REG(INSN, N) (XVECEXP (INSN, 2, N)) 808#define RANGE_INFO_NUM_REGS(INSN) (XVECLEN (INSN, 2)) 809 810/* For RANGE_{START,END} notes, the number of calls within the range. */ 811#define RANGE_INFO_NCALLS(INSN) (XINT (INSN, 3)) 812 813/* For RANGE_{START,END} notes, the number of insns within the range. */ 814#define RANGE_INFO_NINSNS(INSN) (XINT (INSN, 4)) 815 816/* For RANGE_{START,END} notes, a unique # to identify this range. */ 817#define RANGE_INFO_UNIQUE(INSN) (XINT (INSN, 5)) 818 819/* For RANGE_{START,END} notes, the basic block # the range starts with. */ 820#define RANGE_INFO_BB_START(INSN) (XINT (INSN, 6)) 821 822/* For RANGE_{START,END} notes, the basic block # the range ends with. */ 823#define RANGE_INFO_BB_END(INSN) (XINT (INSN, 7)) 824 825/* For RANGE_{START,END} notes, the loop depth the range is in. */ 826#define RANGE_INFO_LOOP_DEPTH(INSN) (XINT (INSN, 8)) 827 828/* For RANGE_{START,END} notes, the bitmap of live registers at the start 829 of the range. */ 830#define RANGE_INFO_LIVE_START(INSN) (XBITMAP (INSN, 9)) 831 832/* For RANGE_{START,END} notes, the bitmap of live registers at the end 833 of the range. */ 834#define RANGE_INFO_LIVE_END(INSN) (XBITMAP (INSN, 10)) 835 836/* For RANGE_START notes, the marker # of the start of the range. */ 837#define RANGE_INFO_MARKER_START(INSN) (XINT (INSN, 11)) 838 839/* For RANGE_START notes, the marker # of the end of the range. */ 840#define RANGE_INFO_MARKER_END(INSN) (XINT (INSN, 12)) 841 842/* Original pseudo register # for a live range note. */ 843#define RANGE_REG_PSEUDO(INSN,N) (XINT (XVECEXP (INSN, 2, N), 0)) 844 845/* Pseudo register # original register is copied into or -1. */ 846#define RANGE_REG_COPY(INSN,N) (XINT (XVECEXP (INSN, 2, N), 1)) 847 848/* How many times a register in a live range note was referenced. */ 849#define RANGE_REG_REFS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 2)) 850 851/* How many times a register in a live range note was set. */ 852#define RANGE_REG_SETS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 3)) 853 854/* How many times a register in a live range note died. */ 855#define RANGE_REG_DEATHS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 4)) 856 857/* Whether the original value is needed to be copied into the range register at 858 the start of the range. */ 859#define RANGE_REG_COPY_FLAGS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 5)) 860 861/* # of insns the register copy is live over. */ 862#define RANGE_REG_LIVE_LENGTH(INSN,N) (XINT (XVECEXP (INSN, 2, N), 6)) 863 864/* # of calls the register copy is live over. */ 865#define RANGE_REG_N_CALLS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 7)) 866 867/* DECL_NODE pointer of the declaration if the register is a user defined 868 variable. */ 869#define RANGE_REG_SYMBOL_NODE(INSN,N) (XTREE (XVECEXP (INSN, 2, N), 8)) 870 871/* BLOCK_NODE pointer to the block the variable is declared in if the 872 register is a user defined variable. */ 873#define RANGE_REG_BLOCK_NODE(INSN,N) (XTREE (XVECEXP (INSN, 2, N), 9)) 874 875/* EXPR_LIST of the distinct ranges a variable is in. */ 876#define RANGE_VAR_LIST(INSN) (XEXP (INSN, 0)) 877 878/* Block a variable is declared in. */ 879#define RANGE_VAR_BLOCK(INSN) (XTREE (INSN, 1)) 880 881/* # of distinct ranges a variable is in. */ 882#define RANGE_VAR_NUM(INSN) (XINT (INSN, 2)) 883 884/* For a NOTE_INSN_LIVE note, the registers which are currently live. */ 885#define RANGE_LIVE_BITMAP(INSN) (XBITMAP (INSN, 0)) 886 887/* For a NOTE_INSN_LIVE note, the original basic block number. */ 888#define RANGE_LIVE_ORIG_BLOCK(INSN) (XINT (INSN, 1)) 889 890/* Generally useful functions. */ 891 892/* The following functions accept a wide integer argument. Rather than 893 having to cast on every function call, we use a macro instead, that is 894 defined here and in tree.h. */ 895 896#ifndef exact_log2 897#define exact_log2(N) exact_log2_wide ((unsigned HOST_WIDE_INT) (N)) 898#define floor_log2(N) floor_log2_wide ((unsigned HOST_WIDE_INT) (N)) 899#endif 900extern int exact_log2_wide PROTO((unsigned HOST_WIDE_INT)); 901extern int floor_log2_wide PROTO((unsigned HOST_WIDE_INT)); 902 903/* In expmed.c */ 904extern int ceil_log2 PROTO((unsigned HOST_WIDE_INT)); 905 906#define plus_constant(X,C) plus_constant_wide (X, (HOST_WIDE_INT) (C)) 907 908#define plus_constant_for_output(X,C) \ 909 plus_constant_for_output_wide (X, (HOST_WIDE_INT) (C)) 910 911/* In explow.c */ 912extern rtx plus_constant_wide PROTO((rtx, HOST_WIDE_INT)); 913extern rtx plus_constant_for_output_wide PROTO((rtx, HOST_WIDE_INT)); 914extern void optimize_save_area_alloca PROTO((rtx)); 915 916extern rtx gen_rtx PVPROTO((enum rtx_code, 917 enum machine_mode, ...)); 918extern rtvec gen_rtvec PVPROTO((int, ...)); 919 920#ifdef BUFSIZ 921extern rtx read_rtx PROTO((FILE *)); 922#endif 923 924extern char *oballoc PROTO((int)); 925extern char *permalloc PROTO((int)); 926extern rtx rtx_alloc PROTO((RTX_CODE)); 927extern rtvec rtvec_alloc PROTO((int)); 928extern rtx copy_rtx PROTO((rtx)); 929extern rtx copy_rtx_if_shared PROTO((rtx)); 930extern rtx copy_most_rtx PROTO((rtx, rtx)); 931extern rtx shallow_copy_rtx PROTO((rtx)); 932extern rtvec gen_rtvec_v PROTO((int, rtx *)); 933extern rtvec gen_rtvec_vv PROTO((int, rtunion *)); 934extern rtx gen_reg_rtx PROTO((enum machine_mode)); 935extern rtx gen_label_rtx PROTO((void)); 936extern rtx gen_inline_header_rtx PROTO((rtx, rtx, int, int, int, int, 937 int, int, rtx, rtx, int, int, 938 rtvec, rtx, 939 rtvec, char *, char *, rtvec)); 940extern rtx gen_lowpart_common PROTO((enum machine_mode, rtx)); 941extern rtx gen_lowpart PROTO((enum machine_mode, rtx)); 942extern rtx gen_lowpart_if_possible PROTO((enum machine_mode, rtx)); 943extern rtx gen_highpart PROTO((enum machine_mode, rtx)); 944extern rtx gen_realpart PROTO((enum machine_mode, rtx)); 945extern rtx gen_imagpart PROTO((enum machine_mode, rtx)); 946extern rtx operand_subword PROTO((rtx, int, int, enum machine_mode)); 947extern rtx operand_subword_force PROTO((rtx, int, enum machine_mode)); 948extern int subreg_lowpart_p PROTO((rtx)); 949extern rtx make_safe_from PROTO((rtx, rtx)); 950extern rtx convert_memory_address PROTO((enum machine_mode, rtx)); 951extern rtx memory_address PROTO((enum machine_mode, rtx)); 952extern rtx get_insns PROTO((void)); 953extern rtx get_last_insn PROTO((void)); 954extern rtx get_last_insn_anywhere PROTO((void)); 955extern void start_sequence PROTO((void)); 956extern void push_to_sequence PROTO((rtx)); 957extern void end_sequence PROTO((void)); 958extern rtx gen_sequence PROTO((void)); 959extern rtx immed_double_const PROTO((HOST_WIDE_INT, HOST_WIDE_INT, enum machine_mode)); 960extern rtx force_const_mem PROTO((enum machine_mode, rtx)); 961extern rtx force_reg PROTO((enum machine_mode, rtx)); 962extern rtx get_pool_constant PROTO((rtx)); 963extern enum machine_mode get_pool_mode PROTO((rtx)); 964extern int get_pool_offset PROTO((rtx)); 965extern rtx simplify_subtraction PROTO((rtx)); 966extern rtx assign_stack_local PROTO((enum machine_mode, 967 HOST_WIDE_INT, int)); 968extern rtx assign_stack_temp PROTO((enum machine_mode, 969 HOST_WIDE_INT, int)); 970extern rtx assign_temp PROTO((union tree_node *, 971 int, int, int)); 972extern rtx protect_from_queue PROTO((rtx, int)); 973extern void emit_queue PROTO((void)); 974extern rtx emit_move_insn PROTO((rtx, rtx)); 975extern rtx emit_insn_before PROTO((rtx, rtx)); 976extern rtx emit_jump_insn_before PROTO((rtx, rtx)); 977extern rtx emit_call_insn_before PROTO((rtx, rtx)); 978extern rtx emit_barrier_before PROTO((rtx)); 979extern rtx emit_label_before PROTO((rtx, rtx)); 980extern rtx emit_note_before PROTO((int, rtx)); 981extern rtx emit_insn_after PROTO((rtx, rtx)); 982extern rtx emit_jump_insn_after PROTO((rtx, rtx)); 983extern rtx emit_barrier_after PROTO((rtx)); 984extern rtx emit_label_after PROTO((rtx, rtx)); 985extern rtx emit_note_after PROTO((int, rtx)); 986extern rtx emit_line_note_after PROTO((char *, int, rtx)); 987extern rtx emit_insn PROTO((rtx)); 988extern rtx emit_insns PROTO((rtx)); 989extern rtx emit_insns_before PROTO((rtx, rtx)); 990extern rtx emit_insns_after PROTO((rtx, rtx)); 991extern rtx emit_jump_insn PROTO((rtx)); 992extern rtx emit_call_insn PROTO((rtx)); 993extern rtx emit_label PROTO((rtx)); 994extern rtx emit_barrier PROTO((void)); 995extern rtx emit_line_note PROTO((char *, int)); 996extern rtx emit_note PROTO((char *, int)); 997extern rtx emit_line_note_force PROTO((char *, int)); 998extern rtx make_insn_raw PROTO((rtx)); 999extern rtx previous_insn PROTO((rtx)); 1000extern rtx next_insn PROTO((rtx)); 1001extern rtx prev_nonnote_insn PROTO((rtx)); 1002extern rtx next_nonnote_insn PROTO((rtx)); 1003extern rtx prev_real_insn PROTO((rtx)); 1004extern rtx next_real_insn PROTO((rtx)); 1005extern rtx prev_active_insn PROTO((rtx)); 1006extern rtx next_active_insn PROTO((rtx)); 1007extern rtx prev_label PROTO((rtx)); 1008extern rtx next_label PROTO((rtx)); 1009extern rtx next_cc0_user PROTO((rtx)); 1010extern rtx prev_cc0_setter PROTO((rtx)); 1011extern rtx next_nondeleted_insn PROTO((rtx)); 1012extern enum rtx_code reverse_condition PROTO((enum rtx_code)); 1013extern enum rtx_code swap_condition PROTO((enum rtx_code)); 1014extern enum rtx_code unsigned_condition PROTO((enum rtx_code)); 1015extern enum rtx_code signed_condition PROTO((enum rtx_code)); 1016extern rtx find_equiv_reg PROTO((rtx, rtx, enum reg_class, int, short *, int, enum machine_mode)); 1017extern rtx squeeze_notes PROTO((rtx, rtx)); 1018extern rtx delete_insn PROTO((rtx)); 1019extern void delete_jump PROTO((rtx)); 1020extern rtx get_label_before PROTO((rtx)); 1021extern rtx get_label_after PROTO((rtx)); 1022extern rtx follow_jumps PROTO((rtx)); 1023extern rtx adj_offsettable_operand PROTO((rtx, int)); 1024extern rtx try_split PROTO((rtx, rtx, int)); 1025extern rtx split_insns PROTO((rtx, rtx)); 1026extern rtx simplify_unary_operation PROTO((enum rtx_code, enum machine_mode, rtx, enum machine_mode)); 1027extern rtx simplify_binary_operation PROTO((enum rtx_code, enum machine_mode, rtx, rtx)); 1028extern rtx simplify_ternary_operation PROTO((enum rtx_code, enum machine_mode, enum machine_mode, rtx, rtx, rtx)); 1029extern rtx simplify_relational_operation PROTO((enum rtx_code, enum machine_mode, rtx, rtx)); 1030extern rtx gen_move_insn PROTO((rtx, rtx)); 1031extern rtx gen_jump PROTO((rtx)); 1032extern rtx gen_beq PROTO((rtx)); 1033extern rtx gen_bge PROTO((rtx)); 1034extern rtx gen_ble PROTO((rtx)); 1035extern rtx gen_mem_addressof PROTO((rtx, union tree_node *)); 1036extern rtx eliminate_constant_term PROTO((rtx, rtx *)); 1037extern rtx expand_complex_abs PROTO((enum machine_mode, rtx, rtx, int)); 1038extern enum machine_mode choose_hard_reg_mode PROTO((int, int)); 1039extern void set_unique_reg_note PROTO((rtx, enum reg_note, rtx)); 1040 1041/* Functions in rtlanal.c */ 1042 1043extern int rtx_unstable_p PROTO((rtx)); 1044extern int rtx_varies_p PROTO((rtx)); 1045extern int rtx_addr_varies_p PROTO((rtx)); 1046extern HOST_WIDE_INT get_integer_term PROTO((rtx)); 1047extern rtx get_related_value PROTO((rtx)); 1048extern int reg_mentioned_p PROTO((rtx, rtx)); 1049extern int reg_referenced_p PROTO((rtx, rtx)); 1050extern int reg_used_between_p PROTO((rtx, rtx, rtx)); 1051extern int reg_referenced_between_p PROTO((rtx, rtx, rtx)); 1052extern int reg_set_between_p PROTO((rtx, rtx, rtx)); 1053extern int regs_set_between_p PROTO((rtx, rtx, rtx)); 1054extern int modified_between_p PROTO((rtx, rtx, rtx)); 1055extern int no_labels_between_p PROTO((rtx, rtx)); 1056extern int no_jumps_between_p PROTO((rtx, rtx)); 1057extern int modified_in_p PROTO((rtx, rtx)); 1058extern int reg_set_p PROTO((rtx, rtx)); 1059extern rtx single_set PROTO((rtx)); 1060extern int multiple_sets PROTO((rtx)); 1061extern rtx find_last_value PROTO((rtx, rtx *, rtx, int)); 1062extern int refers_to_regno_p PROTO((int, int, rtx, rtx *)); 1063extern int reg_overlap_mentioned_p PROTO((rtx, rtx)); 1064extern void note_stores PROTO((rtx, void (*)(rtx, rtx))); 1065extern rtx reg_set_last PROTO((rtx, rtx)); 1066extern int rtx_equal_p PROTO((rtx, rtx)); 1067extern int dead_or_set_p PROTO((rtx, rtx)); 1068extern int dead_or_set_regno_p PROTO((rtx, int)); 1069extern rtx find_reg_note PROTO((rtx, enum reg_note, rtx)); 1070extern rtx find_regno_note PROTO((rtx, enum reg_note, int)); 1071extern int find_reg_fusage PROTO((rtx, enum rtx_code, rtx)); 1072extern int find_regno_fusage PROTO((rtx, enum rtx_code, int)); 1073extern void remove_note PROTO((rtx, rtx)); 1074extern int side_effects_p PROTO((rtx)); 1075extern int volatile_refs_p PROTO((rtx)); 1076extern int volatile_insn_p PROTO((rtx)); 1077extern int may_trap_p PROTO((rtx)); 1078extern int inequality_comparisons_p PROTO ((rtx)); 1079extern rtx replace_rtx PROTO((rtx, rtx, rtx)); 1080extern rtx replace_regs PROTO((rtx, rtx *, int, int)); 1081extern int computed_jump_p PROTO((rtx)); 1082typedef int (*rtx_function) PROTO((rtx *, void *)); 1083extern int for_each_rtx PROTO((rtx *, rtx_function, void *)); 1084extern rtx regno_use_in PROTO((int, rtx)); 1085extern int auto_inc_p PROTO((rtx)); 1086extern void remove_node_from_expr_list PROTO((rtx, rtx *)); 1087 1088/* flow.c */ 1089 1090extern rtx find_use_as_address PROTO((rtx, rtx, HOST_WIDE_INT)); 1091 1092/* regclass.c */ 1093 1094/* Maximum number of parallel sets and clobbers in any insn in this fn. 1095 Always at least 3, since the combiner could put that many togetherm 1096 and we want this to remain correct for all the remaining passes. */ 1097 1098extern int max_parallel; 1099 1100/* Free up register info memory. */ 1101extern void free_reg_info PROTO((void)); 1102 1103/* recog.c */ 1104extern int asm_noperands PROTO((rtx)); 1105extern char *decode_asm_operands PROTO((rtx, rtx *, rtx **, 1106 const char **, 1107 enum machine_mode *)); 1108 1109extern enum reg_class reg_preferred_class PROTO((int)); 1110extern enum reg_class reg_alternate_class PROTO((int)); 1111 1112extern rtx get_first_nonparm_insn PROTO((void)); 1113 1114extern void split_block_insns PROTO((int, int)); 1115extern void update_flow_info PROTO((rtx, rtx, rtx, rtx)); 1116 1117/* Standard pieces of rtx, to be substituted directly into things. */ 1118#define pc_rtx (&global_rtl.pc_val) 1119#define cc0_rtx (&global_rtl.cc0_val) 1120 1121#define MAX_SAVED_CONST_INT 64 1122extern struct rtx_def const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1]; 1123 1124#define const0_rtx (&const_int_rtx[MAX_SAVED_CONST_INT]) 1125#define const1_rtx (&const_int_rtx[MAX_SAVED_CONST_INT+1]) 1126#define const2_rtx (&const_int_rtx[MAX_SAVED_CONST_INT+2]) 1127#define constm1_rtx (&const_int_rtx[MAX_SAVED_CONST_INT-1]) 1128extern rtx const_true_rtx; 1129 1130extern rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE]; 1131 1132/* Returns a constant 0 rtx in mode MODE. Integer modes are treated the 1133 same as VOIDmode. */ 1134 1135#define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)]) 1136 1137/* Likewise, for the constants 1 and 2. */ 1138 1139#define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)]) 1140#define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)]) 1141 1142extern struct _global_rtl 1143{ 1144 struct rtx_def pc_val, cc0_val; 1145 struct rtx_def stack_pointer_val, frame_pointer_val; 1146 struct rtx_def hard_frame_pointer_val; 1147 struct rtx_def arg_pointer_val; 1148 struct rtx_def virtual_incoming_args_val; 1149 struct rtx_def virtual_stack_vars_val; 1150 struct rtx_def virtual_stack_dynamic_val; 1151 struct rtx_def virtual_outgoing_args_val; 1152 struct rtx_def virtual_cfa_val; 1153} global_rtl; 1154 1155/* All references to certain hard regs, except those created 1156 by allocating pseudo regs into them (when that's possible), 1157 go through these unique rtx objects. */ 1158#define stack_pointer_rtx (&global_rtl.stack_pointer_val) 1159#define frame_pointer_rtx (&global_rtl.frame_pointer_val) 1160 1161extern rtx pic_offset_table_rtx; 1162extern rtx struct_value_rtx; 1163extern rtx struct_value_incoming_rtx; 1164extern rtx static_chain_rtx; 1165extern rtx static_chain_incoming_rtx; 1166extern rtx return_address_pointer_rtx; 1167 1168/* Include the RTL generation functions. */ 1169 1170#ifndef NO_GENRTL_H 1171#include "genrtl.h" 1172#endif 1173 1174/* There are some RTL codes that require special attention; the 1175 generation functions included above do the raw handling. If you 1176 add to this list, modify special_rtx in gengenrtl.c as well. You 1177 should also modify gen_rtx to use the special function. */ 1178 1179extern rtx gen_rtx_CONST_DOUBLE PROTO((enum machine_mode, rtx, 1180 HOST_WIDE_INT, HOST_WIDE_INT)); 1181extern rtx gen_rtx_CONST_INT PROTO((enum machine_mode, HOST_WIDE_INT)); 1182extern rtx gen_rtx_REG PROTO((enum machine_mode, int)); 1183extern rtx gen_rtx_MEM PROTO((enum machine_mode, rtx)); 1184 1185/* We need the cast here to ensure that we get the same result both with 1186 and without prototypes. */ 1187#define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N)) 1188 1189 1190/* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg 1191 is used to represent the frame pointer. This is because the 1192 hard frame pointer and the automatic variables are separated by an amount 1193 that cannot be determined until after register allocation. We can assume 1194 that in this case ELIMINABLE_REGS will be defined, one action of which 1195 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */ 1196#ifndef HARD_FRAME_POINTER_REGNUM 1197#define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM 1198#endif 1199 1200/* For register elimination to work properly these hard_frame_pointer_rtx, 1201 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to 1202 the same register. */ 1203#if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM 1204#define hard_frame_pointer_rtx (&global_rtl.frame_pointer_val) 1205#else 1206#define hard_frame_pointer_rtx (&global_rtl.hard_frame_pointer_val) 1207#endif 1208 1209#if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM 1210#define arg_pointer_rtx (&global_rtl.frame_pointer_val) 1211#else 1212#if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM 1213#define arg_pointer_rtx (&global_rtl.hard_frame_pointer_val) 1214#else 1215#define arg_pointer_rtx (&global_rtl.arg_pointer_val) 1216#endif 1217#endif 1218 1219/* Virtual registers are used during RTL generation to refer to locations into 1220 the stack frame when the actual location isn't known until RTL generation 1221 is complete. The routine instantiate_virtual_regs replaces these with 1222 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus 1223 a constant. */ 1224 1225#define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER) 1226 1227/* This points to the first word of the incoming arguments passed on the stack, 1228 either by the caller or by the callee when pretending it was passed by the 1229 caller. */ 1230 1231#define virtual_incoming_args_rtx (&global_rtl.virtual_incoming_args_val) 1232 1233#define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER) 1234 1235/* If FRAME_GROWS_DOWNWARD, this points to immediately above the first 1236 variable on the stack. Otherwise, it points to the first variable on 1237 the stack. */ 1238 1239#define virtual_stack_vars_rtx (&global_rtl.virtual_stack_vars_val) 1240 1241#define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1) 1242 1243/* This points to the location of dynamically-allocated memory on the stack 1244 immediately after the stack pointer has been adjusted by the amount 1245 desired. */ 1246 1247#define virtual_stack_dynamic_rtx (&global_rtl.virtual_stack_dynamic_val) 1248 1249#define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2) 1250 1251/* This points to the location in the stack at which outgoing arguments should 1252 be written when the stack is pre-pushed (arguments pushed using push 1253 insns always use sp). */ 1254 1255#define virtual_outgoing_args_rtx (&global_rtl.virtual_outgoing_args_val) 1256 1257#define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3) 1258 1259/* This points to the Canonical Frame Address of the function. This 1260 should corrospond to the CFA produced by INCOMING_FRAME_SP_OFFSET, 1261 but is calculated relative to the arg pointer for simplicity; the 1262 frame pointer nor stack pointer are necessarily fixed relative to 1263 the CFA until after reload. */ 1264 1265#define virtual_cfa_rtx (&global_rtl.virtual_cfa_val) 1266 1267#define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4) 1268 1269#define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4) 1270 1271extern rtx find_next_ref PROTO((rtx, rtx)); 1272extern rtx *find_single_use PROTO((rtx, rtx, rtx *)); 1273 1274extern rtx output_constant_def PROTO((union tree_node *)); 1275extern rtx immed_real_const PROTO((union tree_node *)); 1276extern union tree_node *make_tree PROTO((union tree_node *, rtx)); 1277 1278/* Define a default value for STORE_FLAG_VALUE. */ 1279 1280#ifndef STORE_FLAG_VALUE 1281#define STORE_FLAG_VALUE 1 1282#endif 1283 1284/* Nonzero after the second flow pass has completed. 1285 Set to 1 or 0 by toplev.c */ 1286extern int flow2_completed; 1287 1288/* Nonzero after end of reload pass. 1289 Set to 1 or 0 by reload1.c. */ 1290 1291extern int reload_completed; 1292 1293/* Set to 1 while reload_as_needed is operating. 1294 Required by some machines to handle any generated moves differently. */ 1295 1296extern int reload_in_progress; 1297 1298/* If this is nonzero, we do not bother generating VOLATILE 1299 around volatile memory references, and we are willing to 1300 output indirect addresses. If cse is to follow, we reject 1301 indirect addresses so a useful potential cse is generated; 1302 if it is used only once, instruction combination will produce 1303 the same indirect address eventually. */ 1304extern int cse_not_expected; 1305 1306/* Set to nonzero before life analysis to indicate that it is unsafe to 1307 generate any new pseudo registers. */ 1308extern int no_new_pseudos; 1309 1310/* Indexed by pseudo register number, gives the rtx for that pseudo. 1311 Allocated in parallel with regno_pointer_flag. */ 1312extern rtx *regno_reg_rtx; 1313 1314/* Vector indexed by regno; contain the alignment in bytes and type 1315 pointed to for a register that contains a pointer, if known. */ 1316extern char *regno_pointer_align; 1317#define REGNO_POINTER_ALIGN(REGNO) regno_pointer_align[REGNO] 1318 1319/* Translates rtx code to tree code, for those codes needed by 1320 REAL_ARITHMETIC. The function returns an int because the caller may not 1321 know what `enum tree_code' means. */ 1322 1323extern int rtx_to_tree_code PROTO((enum rtx_code)); 1324 1325/* In tree.c */ 1326extern void obfree PROTO ((char *)); 1327struct obstack; 1328extern void gcc_obstack_init PROTO ((struct obstack *)); 1329extern void pop_obstacks PROTO ((void)); 1330extern void push_obstacks PROTO ((struct obstack *, 1331 struct obstack *)); 1332#ifdef BUFSIZ 1333extern int read_skip_spaces PROTO ((FILE *)); 1334#endif 1335 1336/* In cse.c */ 1337struct cse_basic_block_data; 1338extern int rtx_cost PROTO ((rtx, enum rtx_code)); 1339extern void delete_trivially_dead_insns PROTO ((rtx, int)); 1340#ifdef BUFSIZ 1341extern int cse_main PROTO ((rtx, int, int, FILE *)); 1342#endif 1343extern void cse_end_of_basic_block PROTO ((rtx, 1344 struct cse_basic_block_data *, 1345 int, int, int)); 1346 1347/* In jump.c */ 1348extern int comparison_dominates_p PROTO ((enum rtx_code, enum rtx_code)); 1349extern int condjump_p PROTO ((rtx)); 1350extern rtx condjump_label PROTO ((rtx)); 1351extern int simplejump_p PROTO ((rtx)); 1352extern int returnjump_p PROTO ((rtx)); 1353extern int sets_cc0_p PROTO ((rtx)); 1354extern int invert_jump PROTO ((rtx, rtx)); 1355extern int rtx_renumbered_equal_p PROTO ((rtx, rtx)); 1356extern int true_regnum PROTO ((rtx)); 1357extern int redirect_jump PROTO ((rtx, rtx)); 1358extern void jump_optimize PROTO ((rtx, int, int, int)); 1359extern void rebuild_jump_labels PROTO ((rtx)); 1360extern void thread_jumps PROTO ((rtx, int, int)); 1361extern int redirect_exp PROTO ((rtx *, rtx, rtx, rtx)); 1362extern int rtx_equal_for_thread_p PROTO ((rtx, rtx, rtx)); 1363extern int invert_exp PROTO ((rtx, rtx)); 1364extern int can_reverse_comparison_p PROTO ((rtx, rtx)); 1365extern void delete_for_peephole PROTO ((rtx, rtx)); 1366extern int condjump_in_parallel_p PROTO ((rtx)); 1367 1368/* Flags for jump_optimize() */ 1369#define JUMP_CROSS_JUMP 1 1370#define JUMP_NOOP_MOVES 1 1371#define JUMP_AFTER_REGSCAN 1 1372 1373/* In emit-rtl.c. */ 1374extern int max_reg_num PROTO ((void)); 1375extern int max_label_num PROTO ((void)); 1376extern int get_first_label_num PROTO ((void)); 1377extern void delete_insns_since PROTO ((rtx)); 1378extern void mark_reg_pointer PROTO ((rtx, int)); 1379extern void mark_user_reg PROTO ((rtx)); 1380extern void reset_used_flags PROTO ((rtx)); 1381extern void reorder_insns PROTO ((rtx, rtx, rtx)); 1382extern int get_max_uid PROTO ((void)); 1383extern int in_sequence_p PROTO ((void)); 1384extern void force_next_line_note PROTO ((void)); 1385extern void init_emit PROTO ((void)); 1386extern void init_emit_once PROTO ((int)); 1387extern void push_topmost_sequence PROTO ((void)); 1388extern void pop_topmost_sequence PROTO ((void)); 1389extern int subreg_realpart_p PROTO ((rtx)); 1390extern void reverse_comparison PROTO ((rtx)); 1391extern void set_new_first_and_last_insn PROTO ((rtx, rtx)); 1392extern void set_new_first_and_last_label_num PROTO ((int, int)); 1393extern void unshare_all_rtl PROTO ((rtx)); 1394extern void set_last_insn PROTO ((rtx)); 1395extern void link_cc0_insns PROTO ((rtx)); 1396extern void add_insn PROTO ((rtx)); 1397extern void add_insn_before PROTO ((rtx, rtx)); 1398extern void add_insn_after PROTO ((rtx, rtx)); 1399extern void remove_insn PROTO ((rtx)); 1400extern void reorder_insns_with_line_notes PROTO ((rtx, rtx, rtx)); 1401extern void emit_insn_after_with_line_notes PROTO ((rtx, rtx, rtx)); 1402extern enum rtx_code classify_insn PROTO ((rtx)); 1403extern void init_virtual_regs PROTO ((void)); 1404extern rtx emit PROTO ((rtx)); 1405/* Query and clear/ restore no_line_numbers. This is used by the 1406 switch / case handling in stmt.c to give proper line numbers in 1407 warnings about unreachable code. */ 1408int force_line_numbers PROTO((void)); 1409void restore_line_number_status PROTO((int old_value)); 1410 1411/* In insn-emit.c */ 1412extern void add_clobbers PROTO ((rtx, int)); 1413 1414/* In combine.c */ 1415extern void combine_instructions PROTO ((rtx, int)); 1416extern int extended_count PROTO ((rtx, enum machine_mode, int)); 1417extern rtx remove_death PROTO ((int, rtx)); 1418#ifdef BUFSIZ 1419extern void dump_combine_stats PROTO ((FILE *)); 1420extern void dump_combine_total_stats PROTO ((FILE *)); 1421#endif 1422 1423/* In sched.c. */ 1424#ifdef BUFSIZ 1425extern void schedule_insns PROTO ((FILE *)); 1426#endif 1427#ifdef HAIFA 1428extern void fix_sched_param PROTO ((char *, char *)); 1429#endif 1430 1431/* In print-rtl.c */ 1432extern void debug_rtx PROTO ((rtx)); 1433extern void debug_rtx_list PROTO ((rtx, int)); 1434extern rtx debug_rtx_find PROTO ((rtx, int)); 1435#ifdef BUFSIZ 1436extern void print_rtl PROTO ((FILE *, rtx)); 1437extern int print_rtl_single PROTO ((FILE *, rtx)); 1438extern void print_inline_rtx PROTO ((FILE *, rtx, int)); 1439#endif 1440 1441/* In loop.c */ 1442extern void init_loop PROTO ((void)); 1443extern rtx libcall_other_reg PROTO ((rtx, rtx)); 1444#ifdef BUFSIZ 1445extern void loop_optimize PROTO ((rtx, FILE *, int, int)); 1446#endif 1447extern void record_excess_regs PROTO ((rtx, rtx, rtx *)); 1448 1449/* In function.c */ 1450extern void reposition_prologue_and_epilogue_notes PROTO ((rtx)); 1451extern void thread_prologue_and_epilogue_insns PROTO ((rtx)); 1452extern void use_variable PROTO ((rtx)); 1453extern HOST_WIDE_INT get_frame_size PROTO ((void)); 1454extern void preserve_rtl_expr_result PROTO ((rtx)); 1455extern void mark_temp_addr_taken PROTO ((rtx)); 1456extern void update_temp_slot_address PROTO ((rtx, rtx)); 1457extern void use_variable_after PROTO ((rtx, rtx)); 1458extern void purge_addressof PROTO ((rtx)); 1459 1460/* In reload.c */ 1461extern int operands_match_p PROTO ((rtx, rtx)); 1462extern int safe_from_earlyclobber PROTO ((rtx, rtx)); 1463 1464/* In stmt.c */ 1465extern void expand_null_return PROTO((void)); 1466extern void emit_jump PROTO ((rtx)); 1467extern int preserve_subexpressions_p PROTO ((void)); 1468 1469/* List (chain of EXPR_LIST) of labels heading the current handlers for 1470 nonlocal gotos. */ 1471extern rtx nonlocal_goto_handler_labels; 1472 1473/* In expr.c */ 1474extern void init_expr_once PROTO ((void)); 1475extern void move_by_pieces PROTO ((rtx, rtx, int, int)); 1476 1477 1478/* In stupid.c */ 1479#ifdef BUFSIZ 1480extern void stupid_life_analysis PROTO ((rtx, int, FILE *)); 1481#endif 1482 1483/* In flow.c */ 1484extern void allocate_bb_life_data PROTO ((void)); 1485extern void allocate_reg_life_data PROTO ((void)); 1486extern void recompute_reg_usage PROTO ((rtx, int)); 1487#ifdef BUFSIZ 1488extern void dump_flow_info PROTO ((FILE *)); 1489#endif 1490extern void free_bb_mem PROTO ((void)); 1491 1492/* In expmed.c */ 1493extern void init_expmed PROTO ((void)); 1494extern void expand_inc PROTO ((rtx, rtx)); 1495extern void expand_dec PROTO ((rtx, rtx)); 1496extern rtx expand_mult_highpart PROTO ((enum machine_mode, rtx, 1497 unsigned HOST_WIDE_INT, rtx, 1498 int, int)); 1499 1500/* In gcse.c */ 1501#ifdef BUFSIZ 1502extern int gcse_main PROTO ((rtx, FILE *)); 1503#endif 1504 1505/* In global.c */ 1506extern void mark_elimination PROTO ((int, int)); 1507#ifdef BUFSIZ 1508extern int global_alloc PROTO ((FILE *)); 1509extern void dump_global_regs PROTO ((FILE *)); 1510#endif 1511#ifdef HARD_CONST 1512extern void retry_global_alloc PROTO ((int, HARD_REG_SET)); 1513#endif 1514 1515/* In regclass.c */ 1516extern int reg_classes_intersect_p PROTO ((enum reg_class, enum reg_class)); 1517extern int reg_class_subset_p PROTO ((enum reg_class, enum reg_class)); 1518extern void globalize_reg PROTO ((int)); 1519extern void init_regs PROTO ((void)); 1520extern void init_reg_sets PROTO ((void)); 1521extern void regset_release_memory PROTO ((void)); 1522extern void regclass_init PROTO ((void)); 1523extern void regclass PROTO ((rtx, int)); 1524extern void reg_scan PROTO ((rtx, int, int)); 1525extern void reg_scan_update PROTO ((rtx, rtx, int)); 1526extern void fix_register PROTO ((char *, int, int)); 1527 1528/* In regmove.c */ 1529#ifdef BUFSIZ 1530extern void regmove_optimize PROTO ((rtx, int, FILE *)); 1531#endif 1532 1533/* In reorg.c */ 1534#ifdef BUFSIZ 1535extern void dbr_schedule PROTO ((rtx, FILE *)); 1536#endif 1537 1538/* In optabs.c */ 1539extern void init_optabs PROTO ((void)); 1540 1541/* In local-alloc.c */ 1542#ifdef BUFSIZ 1543extern void dump_local_alloc PROTO ((FILE *)); 1544#endif 1545extern int local_alloc PROTO ((void)); 1546extern int function_invariant_p PROTO ((rtx)); 1547 1548/* In reload1.c */ 1549extern void reload_cse_regs PROTO ((rtx)); 1550extern void init_reload PROTO ((void)); 1551extern void mark_home_live PROTO ((int)); 1552#ifdef BUFSIZ 1553extern int reload PROTO ((rtx, int, FILE *)); 1554#endif 1555 1556/* In caller-save.c */ 1557extern void init_caller_save PROTO ((void)); 1558 1559/* In profile.c */ 1560extern void init_branch_prob PROTO ((const char *)); 1561#ifdef BUFSIZ 1562extern void branch_prob PROTO ((rtx, FILE *)); 1563extern void end_branch_prob PROTO ((FILE *)); 1564#endif 1565extern void output_func_start_profiler PROTO ((void)); 1566 1567/* In reg-stack.c */ 1568#ifdef BUFSIZ 1569extern void reg_to_stack PROTO ((rtx, FILE *)); 1570#endif 1571extern int stack_regs_mentioned_p PROTO ((rtx)); 1572 1573/* In fold-const.c */ 1574extern int add_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT, 1575 HOST_WIDE_INT, HOST_WIDE_INT, 1576 HOST_WIDE_INT *, HOST_WIDE_INT *)); 1577extern int neg_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT, 1578 HOST_WIDE_INT *, HOST_WIDE_INT *)); 1579extern int mul_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT, 1580 HOST_WIDE_INT, HOST_WIDE_INT, 1581 HOST_WIDE_INT *, HOST_WIDE_INT *)); 1582extern void lshift_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT, 1583 HOST_WIDE_INT, int, HOST_WIDE_INT *, 1584 HOST_WIDE_INT *, int)); 1585extern void rshift_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT, 1586 HOST_WIDE_INT, int, 1587 HOST_WIDE_INT *, HOST_WIDE_INT *, int)); 1588extern void lrotate_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT, 1589 HOST_WIDE_INT, int, HOST_WIDE_INT *, 1590 HOST_WIDE_INT *)); 1591extern void rrotate_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT, 1592 HOST_WIDE_INT, int, HOST_WIDE_INT *, 1593 HOST_WIDE_INT *)); 1594 1595/* In calls.c */ 1596/* Emit library call. */ 1597extern void emit_library_call PVPROTO ((rtx, int, enum machine_mode, 1598 int, ...)); 1599extern rtx emit_library_call_value PVPROTO((rtx, rtx, int, 1600 enum machine_mode, 1601 int, ...)); 1602 1603/* In unroll.c */ 1604extern int set_dominates_use PROTO ((int, int, int, rtx, rtx)); 1605 1606/* In varasm.c */ 1607extern void bss_section PROTO ((void)); 1608extern int in_data_section PROTO ((void)); 1609extern int supports_one_only PROTO ((void)); 1610 1611/* In rtl.c */ 1612extern void init_rtl PROTO ((void)); 1613extern void rtx_free PROTO ((rtx)); 1614 1615/* In alias.c */ 1616extern int true_dependence PROTO ((rtx, enum machine_mode, rtx, 1617 int (*)(rtx))); 1618extern int read_dependence PROTO ((rtx, rtx)); 1619extern int anti_dependence PROTO ((rtx, rtx)); 1620extern int output_dependence PROTO ((rtx, rtx)); 1621extern void init_alias_once PROTO ((void)); 1622extern void init_alias_analysis PROTO ((void)); 1623extern void end_alias_analysis PROTO ((void)); 1624 1625extern void record_base_value PROTO ((int, rtx, int)); 1626extern void record_alias_subset PROTO ((int, int)); 1627extern rtx addr_side_effect_eval PROTO ((rtx, int, int)); 1628 1629#ifdef STACK_REGS 1630extern int stack_regs_mentioned PROTO((rtx insn)); 1631#endif 1632 1633#endif /* _RTL_H */ 1634