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1.1 root 1: /* Register Transfer Language (RTL) definitions for GNU C-Compiler 1.1.1.7 ! root 2: Copyright (C) 1987, 1991, 1992, 1993, 1994 Free Software Foundation, Inc. 1.1 root 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 18: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ 19: 20: 21: #include "machmode.h" 22: 23: #undef FFS /* Some systems predefine this symbol; don't let it interfere. */ 24: #undef FLOAT /* Likewise. */ 1.1.1.5 root 25: #undef ABS /* Likewise. */ 26: #undef PC /* Likewise. */ 1.1 root 27: 1.1.1.7 ! root 28: #ifndef TREE_CODE ! 29: union tree_node; ! 30: #endif ! 31: 1.1 root 32: /* Register Transfer Language EXPRESSIONS CODES */ 33: 34: #define RTX_CODE enum rtx_code 35: enum rtx_code { 36: 37: #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM , 38: #include "rtl.def" /* rtl expressions are documented here */ 39: #undef DEF_RTL_EXPR 40: 1.1.1.3 root 41: LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for 1.1 root 42: NUM_RTX_CODE. 1.1.1.3 root 43: Assumes default enum value assignment. */ 1.1 root 44: 45: #define NUM_RTX_CODE ((int)LAST_AND_UNUSED_RTX_CODE) 46: /* The cast here, saves many elsewhere. */ 47: 48: extern int rtx_length[]; 49: #define GET_RTX_LENGTH(CODE) (rtx_length[(int)(CODE)]) 50: 51: extern char *rtx_name[]; 52: #define GET_RTX_NAME(CODE) (rtx_name[(int)(CODE)]) 53: 54: extern char *rtx_format[]; 55: #define GET_RTX_FORMAT(CODE) (rtx_format[(int)(CODE)]) 56: 57: extern char rtx_class[]; 58: #define GET_RTX_CLASS(CODE) (rtx_class[(int)(CODE)]) 59: 60: /* Common union for an element of an rtx. */ 61: 62: typedef union rtunion_def 63: { 1.1.1.4 root 64: HOST_WIDE_INT rtwint; 1.1 root 65: int rtint; 66: char *rtstr; 67: struct rtx_def *rtx; 68: struct rtvec_def *rtvec; 69: enum machine_mode rttype; 70: } rtunion; 71: 72: /* RTL expression ("rtx"). */ 73: 74: typedef struct rtx_def 75: { 76: #ifdef ONLY_INT_FIELDS 1.1.1.4 root 77: #ifdef CODE_FIELD_BUG 78: unsigned int code : 16; 79: #else 1.1 root 80: unsigned short code; 1.1.1.4 root 81: #endif 1.1 root 82: #else 83: /* The kind of expression this is. */ 84: enum rtx_code code : 16; 85: #endif 86: /* The kind of value the expression has. */ 87: #ifdef ONLY_INT_FIELDS 88: int mode : 8; 89: #else 90: enum machine_mode mode : 8; 91: #endif 92: /* 1 in an INSN if it can alter flow of control 93: within this function. Not yet used! */ 94: unsigned int jump : 1; 95: /* 1 in an INSN if it can call another function. Not yet used! */ 96: unsigned int call : 1; 97: /* 1 in a MEM or REG if value of this expression will never change 98: during the current function, even though it is not 99: manifestly constant. 1.1.1.4 root 100: 1 in a SUBREG if it is from a promoted variable that is unsigned. 1.1 root 101: 1 in a SYMBOL_REF if it addresses something in the per-function 102: constants pool. 103: 1 in a CALL_INSN if it is a const call. 104: 1 in a JUMP_INSN if it is a branch that should be annulled. Valid from 105: reorg until end of compilation; cleared before used. */ 106: unsigned int unchanging : 1; 107: /* 1 in a MEM expression if contents of memory are volatile. 108: 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL or BARRIER 109: if it is deleted. 110: 1 in a REG expression if corresponds to a variable declared by the user. 111: 0 for an internally generated temporary. 1.1.1.4 root 112: In a SYMBOL_REF, this flag is used for machine-specific purposes. 113: In a LABEL_REF or in a REG_LABEL note, this is LABEL_REF_NONLOCAL_P. */ 1.1 root 114: unsigned int volatil : 1; 115: /* 1 in a MEM referring to a field of a structure (not a union!). 116: 0 if the MEM was a variable or the result of a * operator in C; 117: 1 if it was the result of a . or -> operator (on a struct) in C. 118: 1 in a REG if the register is used only in exit code a loop. 1.1.1.4 root 119: 1 in a SUBREG expression if was generated from a variable with a 120: promoted mode. 1.1 root 121: 1 in a CODE_LABEL if the label is used for nonlocal gotos 122: and must not be deleted even if its count is zero. 123: 1 in a LABEL_REF if this is a reference to a label outside the 124: current loop. 125: 1 in an INSN, JUMP_INSN, or CALL_INSN if this insn must be scheduled 1.1.1.2 root 126: together with the preceding insn. Valid only within sched. 1.1 root 127: 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and 128: from the target of a branch. Valid from reorg until end of compilation; 129: cleared before used. */ 130: unsigned int in_struct : 1; 131: /* 1 if this rtx is used. This is used for copying shared structure. 132: See `unshare_all_rtl'. 133: In a REG, this is not needed for that purpose, and used instead 134: in `leaf_renumber_regs_insn'. 135: In a SYMBOL_REF, means that emit_library_call 136: has used it as the function. */ 137: unsigned int used : 1; 138: /* Nonzero if this rtx came from procedure integration. 139: In a REG, nonzero means this reg refers to the return value 140: of the current function. */ 141: unsigned integrated : 1; 142: /* The first element of the operands of this rtx. 143: The number of operands and their types are controlled 144: by the `code' field, according to rtl.def. */ 145: rtunion fld[1]; 146: } *rtx; 147: 1.1.1.6 root 148: 1.1.1.4 root 149: /* Add prototype support. */ 150: #ifndef PROTO 151: #if defined (USE_PROTOTYPES) ? USE_PROTOTYPES : defined (__STDC__) 152: #define PROTO(ARGS) ARGS 153: #else 154: #define PROTO(ARGS) () 155: #endif 156: #endif 157: 1.1.1.7 ! root 158: #ifndef VPROTO ! 159: #ifdef __STDC__ ! 160: #define PVPROTO(ARGS) ARGS ! 161: #define VPROTO(ARGS) ARGS ! 162: #define VA_START(va_list,var) va_start(va_list,var) ! 163: #else ! 164: #define PVPROTO(ARGS) () ! 165: #define VPROTO(ARGS) (va_alist) va_dcl ! 166: #define VA_START(va_list,var) va_start(va_list) ! 167: #endif ! 168: #endif ! 169: ! 170: #ifndef STDIO_PROTO ! 171: #ifdef BUFSIZ ! 172: #define STDIO_PROTO(ARGS) PROTO(ARGS) ! 173: #else ! 174: #define STDIO_PROTO(ARGS) () ! 175: #endif ! 176: #endif ! 177: 1.1 root 178: #define NULL_RTX (rtx) 0 179: 1.1.1.4 root 180: /* Define a generic NULL if one hasn't already been defined. */ 181: 182: #ifndef NULL 183: #define NULL 0 184: #endif 185: 186: #ifndef GENERIC_PTR 187: #if defined (USE_PROTOTYPES) ? USE_PROTOTYPES : defined (__STDC__) 188: #define GENERIC_PTR void * 189: #else 190: #define GENERIC_PTR char * 191: #endif 192: #endif 193: 194: #ifndef NULL_PTR 195: #define NULL_PTR ((GENERIC_PTR)0) 196: #endif 197: 1.1 root 198: /* Define macros to access the `code' field of the rtx. */ 199: 200: #ifdef SHORT_ENUM_BUG 201: #define GET_CODE(RTX) ((enum rtx_code) ((RTX)->code)) 202: #define PUT_CODE(RTX, CODE) ((RTX)->code = ((short) (CODE))) 203: #else 204: #define GET_CODE(RTX) ((RTX)->code) 205: #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE)) 206: #endif 207: 208: #define GET_MODE(RTX) ((RTX)->mode) 209: #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE)) 210: 211: #define RTX_INTEGRATED_P(RTX) ((RTX)->integrated) 212: #define RTX_UNCHANGING_P(RTX) ((RTX)->unchanging) 213: 214: /* RTL vector. These appear inside RTX's when there is a need 215: for a variable number of things. The principle use is inside 216: PARALLEL expressions. */ 217: 218: typedef struct rtvec_def{ 219: unsigned num_elem; /* number of elements */ 220: rtunion elem[1]; 221: } *rtvec; 222: 223: #define NULL_RTVEC (rtvec) 0 224: 225: #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem) 226: #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (unsigned) NUM) 227: 228: #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[(I)].rtx) 229: 230: /* 1 if X is a REG. */ 231: 232: #define REG_P(X) (GET_CODE (X) == REG) 233: 234: /* 1 if X is a constant value that is an integer. */ 235: 236: #define CONSTANT_P(X) \ 237: (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \ 238: || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE \ 239: || GET_CODE (X) == CONST || GET_CODE (X) == HIGH) 240: 241: /* General accessor macros for accessing the fields of an rtx. */ 242: 243: #define XEXP(RTX, N) ((RTX)->fld[N].rtx) 244: #define XINT(RTX, N) ((RTX)->fld[N].rtint) 1.1.1.4 root 245: #define XWINT(RTX, N) ((RTX)->fld[N].rtwint) 1.1 root 246: #define XSTR(RTX, N) ((RTX)->fld[N].rtstr) 247: #define XVEC(RTX, N) ((RTX)->fld[N].rtvec) 248: #define XVECLEN(RTX, N) ((RTX)->fld[N].rtvec->num_elem) 249: #define XVECEXP(RTX,N,M)((RTX)->fld[N].rtvec->elem[M].rtx) 250: 251: /* ACCESS MACROS for particular fields of insns. */ 252: 253: /* Holds a unique number for each insn. 254: These are not necessarily sequentially increasing. */ 255: #define INSN_UID(INSN) ((INSN)->fld[0].rtint) 256: 257: /* Chain insns together in sequence. */ 258: #define PREV_INSN(INSN) ((INSN)->fld[1].rtx) 259: #define NEXT_INSN(INSN) ((INSN)->fld[2].rtx) 260: 261: /* The body of an insn. */ 262: #define PATTERN(INSN) ((INSN)->fld[3].rtx) 263: 264: /* Code number of instruction, from when it was recognized. 265: -1 means this instruction has not been recognized yet. */ 266: #define INSN_CODE(INSN) ((INSN)->fld[4].rtint) 267: 268: /* Set up in flow.c; empty before then. 269: Holds a chain of INSN_LIST rtx's whose first operands point at 270: previous insns with direct data-flow connections to this one. 271: That means that those insns set variables whose next use is in this insn. 272: They are always in the same basic block as this insn. */ 273: #define LOG_LINKS(INSN) ((INSN)->fld[5].rtx) 274: 275: /* 1 if insn has been deleted. */ 276: #define INSN_DELETED_P(INSN) ((INSN)->volatil) 277: 278: /* 1 if insn is a call to a const function. */ 279: #define CONST_CALL_P(INSN) ((INSN)->unchanging) 280: 281: /* 1 if insn is a branch that should not unconditionally execute its 282: delay slots, i.e., it is an annulled branch. */ 283: #define INSN_ANNULLED_BRANCH_P(INSN) ((INSN)->unchanging) 284: 285: /* 1 if insn is in a delay slot and is from the target of the branch. If 1.1.1.3 root 286: the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be 1.1 root 287: executed if the branch is taken. For annulled branches with this bit 288: clear, the insn should be executed only if the branch is not taken. */ 289: #define INSN_FROM_TARGET_P(INSN) ((INSN)->in_struct) 290: 291: /* Holds a list of notes on what this insn does to various REGs. 292: It is a chain of EXPR_LIST rtx's, where the second operand 293: is the chain pointer and the first operand is the REG being described. 294: The mode field of the EXPR_LIST contains not a real machine mode 295: but a value that says what this note says about the REG: 296: REG_DEAD means that the value in REG dies in this insn (i.e., it is 297: not needed past this insn). If REG is set in this insn, the REG_DEAD 298: note may, but need not, be omitted. 299: REG_INC means that the REG is autoincremented or autodecremented. 300: REG_EQUIV describes the insn as a whole; it says that the 301: insn sets a register to a constant value or to be equivalent to 302: a memory address. If the 303: register is spilled to the stack then the constant value 304: should be substituted for it. The contents of the REG_EQUIV 305: is the constant value or memory address, which may be different 306: from the source of the SET although it has the same value. 307: REG_EQUAL is like REG_EQUIV except that the destination 308: is only momentarily equal to the specified rtx. Therefore, it 309: cannot be used for substitution; but it can be used for cse. 310: REG_RETVAL means that this insn copies the return-value of 311: a library call out of the hard reg for return values. This note 312: is actually an INSN_LIST and it points to the first insn involved 313: in setting up arguments for the call. flow.c uses this to delete 314: the entire library call when its result is dead. 315: REG_LIBCALL is the inverse of REG_RETVAL: it goes on the first insn 316: of the library call and points at the one that has the REG_RETVAL. 317: REG_WAS_0 says that the register set in this insn held 0 before the insn. 318: The contents of the note is the insn that stored the 0. 319: If that insn is deleted or patched to a NOTE, the REG_WAS_0 is inoperative. 320: The REG_WAS_0 note is actually an INSN_LIST, not an EXPR_LIST. 321: REG_NONNEG means that the register is always nonnegative during 322: the containing loop. This is used in branches so that decrement and 323: branch instructions terminating on zero can be matched. There must be 324: an insn pattern in the md file named `decrement_and_branch_until_zero' 325: or else this will never be added to any instructions. 326: REG_NO_CONFLICT means there is no conflict *after this insn* 327: between the register in the note and the destination of this insn. 328: REG_UNUSED identifies a register set in this insn and never used. 329: REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use 330: CC0, respectively. Normally, these are required to be consecutive insns, 331: but we permit putting a cc0-setting insn in the delay slot of a branch 332: as long as only one copy of the insn exists. In that case, these notes 333: point from one to the other to allow code generation to determine what 334: any require information and to properly update CC_STATUS. 335: REG_LABEL points to a CODE_LABEL. Used by non-JUMP_INSNs to 336: say that the CODE_LABEL contained in the REG_LABEL note is used 337: by the insn. 338: REG_DEP_ANTI is used in LOG_LINKS which represent anti (write after read) 339: dependencies. REG_DEP_OUTPUT is used in LOG_LINKS which represent output 340: (write after write) dependencies. Data dependencies, which are the only 341: type of LOG_LINK created by flow, are represented by a 0 reg note kind. */ 342: 343: #define REG_NOTES(INSN) ((INSN)->fld[6].rtx) 344: 345: /* Don't forget to change reg_note_name in rtl.c. */ 346: enum reg_note { REG_DEAD = 1, REG_INC = 2, REG_EQUIV = 3, REG_WAS_0 = 4, 347: REG_EQUAL = 5, REG_RETVAL = 6, REG_LIBCALL = 7, 348: REG_NONNEG = 8, REG_NO_CONFLICT = 9, REG_UNUSED = 10, 349: REG_CC_SETTER = 11, REG_CC_USER = 12, REG_LABEL = 13, 350: REG_DEP_ANTI = 14, REG_DEP_OUTPUT = 15 }; 351: 352: /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */ 353: #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK)) 354: #define PUT_REG_NOTE_KIND(LINK,KIND) PUT_MODE(LINK, (enum machine_mode) (KIND)) 355: 356: /* Names for REG_NOTE's in EXPR_LIST insn's. */ 357: 358: extern char *reg_note_name[]; 359: #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int)(MODE)]) 360: 1.1.1.7 ! root 361: /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of ! 362: USE and CLOBBER expressions. ! 363: USE expressions list the registers filled with arguments that ! 364: are passed to the function. ! 365: CLOBBER expressions document the registers explicitly clobbered ! 366: by this CALL_INSN. ! 367: Pseudo registers can not be mentioned in this list. */ ! 368: #define CALL_INSN_FUNCTION_USAGE(INSN) ((INSN)->fld[7].rtx) ! 369: 1.1 root 370: /* The label-number of a code-label. The assembler label 371: is made from `L' and the label-number printed in decimal. 372: Label numbers are unique in a compilation. */ 373: #define CODE_LABEL_NUMBER(INSN) ((INSN)->fld[3].rtint) 374: 375: #define LINE_NUMBER NOTE 376: 377: /* In a NOTE that is a line number, this is a string for the file name 1.1.1.4 root 378: that the line is in. We use the same field to record block numbers 379: temporarily in NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. 380: (We avoid lots of casts between ints and pointers if we use a 381: different macro for the bock number.) */ 1.1 root 382: 383: #define NOTE_SOURCE_FILE(INSN) ((INSN)->fld[3].rtstr) 1.1.1.4 root 384: #define NOTE_BLOCK_NUMBER(INSN) ((INSN)->fld[3].rtint) 1.1 root 385: 386: /* In a NOTE that is a line number, this is the line number. 387: Other kinds of NOTEs are identified by negative numbers here. */ 388: #define NOTE_LINE_NUMBER(INSN) ((INSN)->fld[4].rtint) 389: 390: /* Codes that appear in the NOTE_LINE_NUMBER field 1.1.1.5 root 391: for kinds of notes that are not line numbers. 1.1 root 392: 1.1.1.5 root 393: Notice that we do not try to use zero here for any of 394: the special note codes because sometimes the source line 395: actually can be zero! This happens (for example) when we 396: are generating code for the per-translation-unit constructor 397: and destructor routines for some C++ translation unit. 398: 399: If you should change any of the following values, or if you 400: should add a new value here, don't forget to change the 401: note_insn_name array in rtl.c. */ 1.1 root 402: 403: /* This note is used to get rid of an insn 404: when it isn't safe to patch the insn out of the chain. */ 405: #define NOTE_INSN_DELETED -1 406: #define NOTE_INSN_BLOCK_BEG -2 407: #define NOTE_INSN_BLOCK_END -3 408: #define NOTE_INSN_LOOP_BEG -4 409: #define NOTE_INSN_LOOP_END -5 410: /* This kind of note is generated at the end of the function body, 411: just before the return insn or return label. 412: In an optimizing compilation it is deleted by the first jump optimization, 413: after enabling that optimizer to determine whether control can fall 414: off the end of the function body without a return statement. */ 415: #define NOTE_INSN_FUNCTION_END -6 416: /* This kind of note is generated just after each call to `setjmp', et al. */ 417: #define NOTE_INSN_SETJMP -7 418: /* Generated at the place in a loop that `continue' jumps to. */ 419: #define NOTE_INSN_LOOP_CONT -8 420: /* Generated at the start of a duplicated exit test. */ 421: #define NOTE_INSN_LOOP_VTOP -9 1.1.1.4 root 422: /* This marks the point immediately after the last prologue insn. */ 423: #define NOTE_INSN_PROLOGUE_END -10 424: /* This marks the point immediately prior to the first epilogue insn. */ 425: #define NOTE_INSN_EPILOGUE_BEG -11 426: /* Generated in place of user-declared labels when they are deleted. */ 427: #define NOTE_INSN_DELETED_LABEL -12 1.1.1.5 root 428: /* This note indicates the start of the real body of the function, 429: i.e. the point just after all of the parms have been moved into 430: their homes, etc. */ 431: #define NOTE_INSN_FUNCTION_BEG -13 1.1 root 432: 1.1.1.4 root 433: 434: #if 0 /* These are not used, and I don't know what they were for. --rms. */ 1.1 root 435: #define NOTE_DECL_NAME(INSN) ((INSN)->fld[3].rtstr) 436: #define NOTE_DECL_CODE(INSN) ((INSN)->fld[4].rtint) 437: #define NOTE_DECL_RTL(INSN) ((INSN)->fld[5].rtx) 438: #define NOTE_DECL_IDENTIFIER(INSN) ((INSN)->fld[6].rtint) 439: #define NOTE_DECL_TYPE(INSN) ((INSN)->fld[7].rtint) 1.1.1.4 root 440: #endif /* 0 */ 1.1 root 441: 442: /* Names for NOTE insn's other than line numbers. */ 443: 444: extern char *note_insn_name[]; 445: #define GET_NOTE_INSN_NAME(NOTE_CODE) (note_insn_name[-(NOTE_CODE)]) 446: 447: /* The name of a label, in case it corresponds to an explicit label 448: in the input source code. */ 449: #define LABEL_NAME(LABEL) ((LABEL)->fld[4].rtstr) 450: 451: /* In jump.c, each label contains a count of the number 452: of LABEL_REFs that point at it, so unused labels can be deleted. */ 453: #define LABEL_NUSES(LABEL) ((LABEL)->fld[5].rtint) 454: 1.1.1.6 root 455: /* The rest is used instead of the above, in a CODE_LABEL, 456: if bytecode is being output. 457: We make the slightly klugy assumption that a LABEL has enough slots 458: to hold these things. That happens to be true. */ 459: 460: /* For static or external objects. */ 461: #define BYTECODE_LABEL(X) (XEXP ((X), 0)) 462: 463: /* For goto labels inside bytecode functions. */ 464: #define BYTECODE_BC_LABEL(X) (*(struct bc_label **) &XEXP ((X), 1)) 465: 1.1 root 466: /* In jump.c, each JUMP_INSN can point to a label that it can jump to, 467: so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can 468: be decremented and possibly the label can be deleted. */ 469: #define JUMP_LABEL(INSN) ((INSN)->fld[7].rtx) 470: 471: /* Once basic blocks are found in flow.c, 472: each CODE_LABEL starts a chain that goes through 473: all the LABEL_REFs that jump to that label. 474: The chain eventually winds up at the CODE_LABEL; it is circular. */ 475: #define LABEL_REFS(LABEL) ((LABEL)->fld[5].rtx) 476: 477: /* This is the field in the LABEL_REF through which the circular chain 478: of references to a particular label is linked. 479: This chain is set up in flow.c. */ 480: 481: #define LABEL_NEXTREF(REF) ((REF)->fld[1].rtx) 482: 483: /* Once basic blocks are found in flow.c, 484: Each LABEL_REF points to its containing instruction with this field. */ 485: 486: #define CONTAINING_INSN(RTX) ((RTX)->fld[2].rtx) 487: 488: /* For a REG rtx, REGNO extracts the register number. */ 489: 490: #define REGNO(RTX) ((RTX)->fld[0].rtint) 491: 492: /* For a REG rtx, REG_FUNCTION_VALUE_P is nonzero if the reg 493: is the current function's return value. */ 494: 495: #define REG_FUNCTION_VALUE_P(RTX) ((RTX)->integrated) 496: 497: /* 1 in a REG rtx if it corresponds to a variable declared by the user. */ 498: #define REG_USERVAR_P(RTX) ((RTX)->volatil) 499: 500: /* For a CONST_INT rtx, INTVAL extracts the integer. */ 501: 1.1.1.4 root 502: #define INTVAL(RTX) ((RTX)->fld[0].rtwint) 1.1 root 503: 504: /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of. 505: SUBREG_WORD extracts the word-number. */ 506: 507: #define SUBREG_REG(RTX) ((RTX)->fld[0].rtx) 508: #define SUBREG_WORD(RTX) ((RTX)->fld[1].rtint) 509: 1.1.1.4 root 510: /* 1 if the REG contained in SUBREG_REG is already known to be 511: sign- or zero-extended from the mode of the SUBREG to the mode of 512: the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the 513: extension. 514: 515: When used as a LHS, is means that this extension must be done 516: when assigning to SUBREG_REG. */ 517: 518: #define SUBREG_PROMOTED_VAR_P(RTX) ((RTX)->in_struct) 519: #define SUBREG_PROMOTED_UNSIGNED_P(RTX) ((RTX)->unchanging) 520: 1.1 root 521: /* Access various components of an ASM_OPERANDS rtx. */ 522: 523: #define ASM_OPERANDS_TEMPLATE(RTX) XSTR ((RTX), 0) 524: #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XSTR ((RTX), 1) 525: #define ASM_OPERANDS_OUTPUT_IDX(RTX) XINT ((RTX), 2) 526: #define ASM_OPERANDS_INPUT_VEC(RTX) XVEC ((RTX), 3) 527: #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XVEC ((RTX), 4) 528: #define ASM_OPERANDS_INPUT(RTX, N) XVECEXP ((RTX), 3, (N)) 529: #define ASM_OPERANDS_INPUT_LENGTH(RTX) XVECLEN ((RTX), 3) 530: #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) XSTR (XVECEXP ((RTX), 4, (N)), 0) 531: #define ASM_OPERANDS_INPUT_MODE(RTX, N) GET_MODE (XVECEXP ((RTX), 4, (N))) 532: #define ASM_OPERANDS_SOURCE_FILE(RTX) XSTR ((RTX), 5) 533: #define ASM_OPERANDS_SOURCE_LINE(RTX) XINT ((RTX), 6) 534: 535: /* For a MEM rtx, 1 if it's a volatile reference. 536: Also in an ASM_OPERANDS rtx. */ 537: #define MEM_VOLATILE_P(RTX) ((RTX)->volatil) 538: 539: /* For a MEM rtx, 1 if it refers to a structure or union component. */ 540: #define MEM_IN_STRUCT_P(RTX) ((RTX)->in_struct) 541: 542: /* For a LABEL_REF, 1 means that this reference is to a label outside the 543: loop containing the reference. */ 544: #define LABEL_OUTSIDE_LOOP_P(RTX) ((RTX)->in_struct) 545: 1.1.1.4 root 546: /* For a LABEL_REF, 1 means it is for a nonlocal label. */ 547: /* Likewise in an EXPR_LIST for a REG_LABEL note. */ 548: #define LABEL_REF_NONLOCAL_P(RTX) ((RTX)->volatil) 549: 1.1 root 550: /* For a CODE_LABEL, 1 means always consider this label to be needed. */ 551: #define LABEL_PRESERVE_P(RTX) ((RTX)->in_struct) 552: 553: /* For a REG, 1 means the register is used only in an exit test of a loop. */ 554: #define REG_LOOP_TEST_P(RTX) ((RTX)->in_struct) 555: 556: /* During sched, for an insn, 1 means that the insn must be scheduled together 1.1.1.2 root 557: with the preceding insn. */ 1.1 root 558: #define SCHED_GROUP_P(INSN) ((INSN)->in_struct) 559: 1.1.1.4 root 560: /* During sched, for the LOG_LINKS of an insn, these cache the adjusted 561: cost of the dependence link. The cost of executing an instruction 562: may vary based on how the results are used. LINK_COST_ZERO is 1 when 563: the cost through the link varies and is unchanged (i.e., the link has 564: zero additional cost). LINK_COST_FREE is 1 when the cost through the 565: link is zero (i.e., the link makes the cost free). In other cases, 566: the adjustment to the cost is recomputed each time it is needed. */ 567: #define LINK_COST_ZERO(X) ((X)->jump) 568: #define LINK_COST_FREE(X) ((X)->call) 569: 1.1 root 570: /* For a SET rtx, SET_DEST is the place that is set 571: and SET_SRC is the value it is set to. */ 572: #define SET_DEST(RTX) ((RTX)->fld[0].rtx) 573: #define SET_SRC(RTX) ((RTX)->fld[1].rtx) 574: 575: /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */ 576: #define TRAP_CONDITION(RTX) ((RTX)->fld[0].rtx) 577: 578: /* 1 in a SYMBOL_REF if it addresses this function's constants pool. */ 579: #define CONSTANT_POOL_ADDRESS_P(RTX) ((RTX)->unchanging) 580: 581: /* Flag in a SYMBOL_REF for machine-specific purposes. */ 582: #define SYMBOL_REF_FLAG(RTX) ((RTX)->volatil) 583: 584: /* 1 means a SYMBOL_REF has been the library function in emit_library_call. */ 585: #define SYMBOL_REF_USED(RTX) ((RTX)->used) 586: 587: /* For an INLINE_HEADER rtx, FIRST_FUNCTION_INSN is the first insn 588: of the function that is not involved in copying parameters to 589: pseudo-registers. FIRST_PARM_INSN is the very first insn of 590: the function, including the parameter copying. 591: We keep this around in case we must splice 592: this function into the assembly code at the end of the file. 593: FIRST_LABELNO is the first label number used by the function (inclusive). 594: LAST_LABELNO is the last label used by the function (exclusive). 595: MAX_REGNUM is the largest pseudo-register used by that function. 596: FUNCTION_ARGS_SIZE is the size of the argument block in the stack. 597: POPS_ARGS is the number of bytes of input arguments popped by the function 598: STACK_SLOT_LIST is the list of stack slots. 599: FUNCTION_FLAGS are where single-bit flags are saved. 600: OUTGOING_ARGS_SIZE is the size of the largest outgoing stack parameter list. 601: ORIGINAL_ARG_VECTOR is a vector of the original DECL_RTX values 602: for the function arguments. 603: ORIGINAL_DECL_INITIAL is a pointer to the original DECL_INITIAL for the 604: function. 605: 606: We want this to lay down like an INSN. The PREV_INSN field 607: is always NULL. The NEXT_INSN field always points to the 608: first function insn of the function being squirreled away. */ 609: 610: #define FIRST_FUNCTION_INSN(RTX) ((RTX)->fld[2].rtx) 611: #define FIRST_PARM_INSN(RTX) ((RTX)->fld[3].rtx) 612: #define FIRST_LABELNO(RTX) ((RTX)->fld[4].rtint) 613: #define LAST_LABELNO(RTX) ((RTX)->fld[5].rtint) 614: #define MAX_PARMREG(RTX) ((RTX)->fld[6].rtint) 615: #define MAX_REGNUM(RTX) ((RTX)->fld[7].rtint) 616: #define FUNCTION_ARGS_SIZE(RTX) ((RTX)->fld[8].rtint) 617: #define POPS_ARGS(RTX) ((RTX)->fld[9].rtint) 618: #define STACK_SLOT_LIST(RTX) ((RTX)->fld[10].rtx) 619: #define FUNCTION_FLAGS(RTX) ((RTX)->fld[11].rtint) 620: #define OUTGOING_ARGS_SIZE(RTX) ((RTX)->fld[12].rtint) 621: #define ORIGINAL_ARG_VECTOR(RTX) ((RTX)->fld[13].rtvec) 622: #define ORIGINAL_DECL_INITIAL(RTX) ((RTX)->fld[14].rtx) 623: 624: /* In FUNCTION_FLAGS we save some variables computed when emitting the code 625: for the function and which must be `or'ed into the current flag values when 626: insns from that function are being inlined. */ 627: 628: /* These ought to be an enum, but non-ANSI compilers don't like that. */ 629: #define FUNCTION_FLAGS_CALLS_ALLOCA 01 630: #define FUNCTION_FLAGS_CALLS_SETJMP 02 631: #define FUNCTION_FLAGS_RETURNS_STRUCT 04 632: #define FUNCTION_FLAGS_RETURNS_PCC_STRUCT 010 633: #define FUNCTION_FLAGS_NEEDS_CONTEXT 020 634: #define FUNCTION_FLAGS_HAS_NONLOCAL_LABEL 040 635: #define FUNCTION_FLAGS_RETURNS_POINTER 0100 636: #define FUNCTION_FLAGS_USES_CONST_POOL 0200 637: #define FUNCTION_FLAGS_CALLS_LONGJMP 0400 638: #define FUNCTION_FLAGS_USES_PIC_OFFSET_TABLE 01000 639: 640: /* Define a macro to look for REG_INC notes, 641: but save time on machines where they never exist. */ 642: 1.1.1.3 root 643: /* Don't continue this line--convex cc version 4.1 would lose. */ 644: #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT)) 1.1 root 645: #define FIND_REG_INC_NOTE(insn, reg) (find_reg_note ((insn), REG_INC, (reg))) 646: #else 647: #define FIND_REG_INC_NOTE(insn, reg) 0 648: #endif 649: 650: /* Indicate whether the machine has any sort of auto increment addressing. 651: If not, we can avoid checking for REG_INC notes. */ 652: 1.1.1.3 root 653: /* Don't continue this line--convex cc version 4.1 would lose. */ 654: #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT)) 1.1 root 655: #define AUTO_INC_DEC 656: #endif 657: 658: /* Generally useful functions. */ 659: 1.1.1.4 root 660: /* The following functions accept a wide integer argument. Rather than 661: having to cast on every function call, we use a macro instead, that is 662: defined here and in tree.h. */ 663: 664: #ifndef exact_log2 665: #define exact_log2(N) exact_log2_wide ((HOST_WIDE_INT) (N)) 666: #define floor_log2(N) floor_log2_wide ((HOST_WIDE_INT) (N)) 667: #endif 668: 669: #define plus_constant(X,C) plus_constant_wide (X, (HOST_WIDE_INT) (C)) 670: 671: #define plus_constant_for_output(X,C) \ 672: plus_constant_for_output_wide (X, (HOST_WIDE_INT) (C)) 673: 674: extern rtx plus_constant_wide PROTO((rtx, HOST_WIDE_INT)); 675: extern rtx plus_constant_for_output_wide PROTO((rtx, HOST_WIDE_INT)); 676: 1.1.1.6 root 677: #define GEN_INT(N) gen_rtx (CONST_INT, VOIDmode, (HOST_WIDE_INT) (N)) 1.1.1.4 root 678: 1.1.1.6 root 679: extern rtx bc_gen_rtx (); 1.1.1.4 root 680: 1.1.1.7 ! root 681: extern rtx gen_rtx PVPROTO((enum rtx_code, ! 682: enum machine_mode, ...)); ! 683: extern rtvec gen_rtvec PVPROTO((int, ...)); ! 684: ! 685: extern rtx read_rtx STDIO_PROTO((FILE *)); 1.1.1.4 root 686: 687: #if 0 688: /* At present, don't prototype xrealloc, since all of the callers don't 689: cast their pointers to char *, and all of the xrealloc's don't use 690: void * yet. */ 1.1.1.5 root 691: extern char *xmalloc PROTO((size_t)); 692: extern char *xrealloc PROTO((void *, size_t)); 1.1.1.4 root 693: #else 1.1.1.5 root 694: extern char *xmalloc (); 1.1.1.4 root 695: extern char *xrealloc (); 696: #endif 697: 698: extern char *oballoc PROTO((int)); 699: extern char *permalloc PROTO((int)); 700: extern void free PROTO((void *)); 701: extern rtx rtx_alloc PROTO((RTX_CODE)); 702: extern rtvec rtvec_alloc PROTO((int)); 703: extern rtx find_reg_note PROTO((rtx, enum reg_note, rtx)); 704: extern rtx find_regno_note PROTO((rtx, enum reg_note, int)); 1.1.1.7 ! root 705: extern int find_reg_fusage PROTO((rtx, enum rtx_code, rtx)); ! 706: extern int find_regno_fusage PROTO((rtx, enum rtx_code, int)); 1.1.1.4 root 707: extern HOST_WIDE_INT get_integer_term PROTO((rtx)); 708: extern rtx get_related_value PROTO((rtx)); 709: extern rtx single_set PROTO((rtx)); 710: extern rtx find_last_value PROTO((rtx, rtx *, rtx)); 711: extern rtx copy_rtx PROTO((rtx)); 712: extern rtx copy_rtx_if_shared PROTO((rtx)); 713: extern rtx copy_most_rtx PROTO((rtx, rtx)); 714: extern rtx replace_rtx PROTO((rtx, rtx, rtx)); 715: extern rtvec gen_rtvec_v PROTO((int, rtx *)); 716: extern rtx gen_reg_rtx PROTO((enum machine_mode)); 717: extern rtx gen_label_rtx PROTO((void)); 718: extern rtx gen_inline_header_rtx PROTO((rtx, rtx, int, int, int, int, int, int, rtx, int, int, rtvec, rtx)); 719: extern rtx gen_lowpart_common PROTO((enum machine_mode, rtx)); 720: extern rtx gen_lowpart PROTO((enum machine_mode, rtx)); 721: extern rtx gen_lowpart_if_possible PROTO((enum machine_mode, rtx)); 722: extern rtx gen_highpart PROTO((enum machine_mode, rtx)); 723: extern rtx gen_realpart PROTO((enum machine_mode, rtx)); 724: extern rtx gen_imagpart PROTO((enum machine_mode, rtx)); 725: extern rtx operand_subword PROTO((rtx, int, int, enum machine_mode)); 726: extern rtx operand_subword_force PROTO((rtx, int, enum machine_mode)); 727: extern int subreg_lowpart_p PROTO((rtx)); 728: extern rtx make_safe_from PROTO((rtx, rtx)); 729: extern rtx memory_address PROTO((enum machine_mode, rtx)); 730: extern rtx get_insns PROTO((void)); 731: extern rtx get_last_insn PROTO((void)); 732: extern rtx get_last_insn_anywhere PROTO((void)); 733: extern void start_sequence PROTO((void)); 734: extern void push_to_sequence PROTO((rtx)); 735: extern void end_sequence PROTO((void)); 736: extern rtx gen_sequence PROTO((void)); 737: extern rtx immed_double_const PROTO((HOST_WIDE_INT, HOST_WIDE_INT, enum machine_mode)); 738: extern rtx force_const_mem PROTO((enum machine_mode, rtx)); 739: extern rtx force_reg PROTO((enum machine_mode, rtx)); 740: extern rtx get_pool_constant PROTO((rtx)); 741: extern enum machine_mode get_pool_mode PROTO((rtx)); 742: extern int get_pool_offset PROTO((rtx)); 743: extern rtx simplify_subtraction PROTO((rtx)); 744: extern rtx assign_stack_local PROTO((enum machine_mode, int, int)); 745: extern rtx assign_stack_temp PROTO((enum machine_mode, int, int)); 746: extern rtx protect_from_queue PROTO((rtx, int)); 747: extern void emit_queue PROTO((void)); 748: extern rtx emit_move_insn PROTO((rtx, rtx)); 749: extern rtx emit_insn_before PROTO((rtx, rtx)); 750: extern rtx emit_jump_insn_before PROTO((rtx, rtx)); 751: extern rtx emit_call_insn_before PROTO((rtx, rtx)); 752: extern rtx emit_barrier_before PROTO((rtx)); 753: extern rtx emit_note_before PROTO((int, rtx)); 754: extern rtx emit_insn_after PROTO((rtx, rtx)); 755: extern rtx emit_jump_insn_after PROTO((rtx, rtx)); 756: extern rtx emit_barrier_after PROTO((rtx)); 757: extern rtx emit_label_after PROTO((rtx, rtx)); 758: extern rtx emit_note_after PROTO((int, rtx)); 759: extern rtx emit_line_note_after PROTO((char *, int, rtx)); 760: extern rtx emit_insn PROTO((rtx)); 761: extern rtx emit_insns PROTO((rtx)); 762: extern rtx emit_insns_before PROTO((rtx, rtx)); 763: extern rtx emit_jump_insn PROTO((rtx)); 764: extern rtx emit_call_insn PROTO((rtx)); 765: extern rtx emit_label PROTO((rtx)); 766: extern rtx emit_barrier PROTO((void)); 767: extern rtx emit_line_note PROTO((char *, int)); 768: extern rtx emit_note PROTO((char *, int)); 769: extern rtx emit_line_note_force PROTO((char *, int)); 770: extern rtx make_insn_raw PROTO((rtx)); 771: extern rtx previous_insn PROTO((rtx)); 772: extern rtx next_insn PROTO((rtx)); 773: extern rtx prev_nonnote_insn PROTO((rtx)); 774: extern rtx next_nonnote_insn PROTO((rtx)); 775: extern rtx prev_real_insn PROTO((rtx)); 776: extern rtx next_real_insn PROTO((rtx)); 777: extern rtx prev_active_insn PROTO((rtx)); 778: extern rtx next_active_insn PROTO((rtx)); 779: extern rtx prev_label PROTO((rtx)); 780: extern rtx next_label PROTO((rtx)); 781: extern rtx next_cc0_user PROTO((rtx)); 782: extern rtx prev_cc0_setter PROTO((rtx)); 783: extern rtx reg_set_last PROTO((rtx, rtx)); 784: extern rtx next_nondeleted_insn PROTO((rtx)); 785: extern enum rtx_code reverse_condition PROTO((enum rtx_code)); 786: extern enum rtx_code swap_condition PROTO((enum rtx_code)); 787: extern enum rtx_code unsigned_condition PROTO((enum rtx_code)); 788: extern enum rtx_code signed_condition PROTO((enum rtx_code)); 789: extern rtx find_equiv_reg PROTO((rtx, rtx, enum reg_class, int, short *, int, enum machine_mode)); 790: extern rtx squeeze_notes PROTO((rtx, rtx)); 791: extern rtx delete_insn PROTO((rtx)); 792: extern void delete_jump PROTO((rtx)); 793: extern rtx get_label_before PROTO((rtx)); 794: extern rtx get_label_after PROTO((rtx)); 795: extern rtx follow_jumps PROTO((rtx)); 796: extern rtx adj_offsettable_operand PROTO((rtx, int)); 797: extern rtx try_split PROTO((rtx, rtx, int)); 798: extern rtx split_insns PROTO((rtx, rtx)); 799: extern rtx simplify_unary_operation PROTO((enum rtx_code, enum machine_mode, rtx, enum machine_mode)); 800: extern rtx simplify_binary_operation PROTO((enum rtx_code, enum machine_mode, rtx, rtx)); 801: extern rtx simplify_ternary_operation PROTO((enum rtx_code, enum machine_mode, enum machine_mode, rtx, rtx, rtx)); 802: extern rtx simplify_relational_operation PROTO((enum rtx_code, enum machine_mode, rtx, rtx)); 803: extern rtx nonlocal_label_rtx_list PROTO((void)); 804: extern rtx gen_move_insn PROTO((rtx, rtx)); 805: extern rtx gen_jump PROTO((rtx)); 806: extern rtx gen_beq PROTO((rtx)); 807: extern rtx gen_bge PROTO((rtx)); 808: extern rtx gen_ble PROTO((rtx)); 809: extern rtx eliminate_constant_term PROTO((rtx, rtx *)); 810: extern rtx expand_complex_abs PROTO((enum machine_mode, rtx, rtx, int)); 1.1.1.7 ! root 811: extern enum machine_mode choose_hard_reg_mode PROTO((int, int)); 1.1 root 812: 813: /* Maximum number of parallel sets and clobbers in any insn in this fn. 814: Always at least 3, since the combiner could put that many togetherm 815: and we want this to remain correct for all the remaining passes. */ 816: 817: extern int max_parallel; 818: 1.1.1.4 root 819: extern int asm_noperands PROTO((rtx)); 820: extern char *decode_asm_operands PROTO((rtx, rtx *, rtx **, char **, enum machine_mode *)); 1.1 root 821: 1.1.1.4 root 822: extern enum reg_class reg_preferred_class PROTO((int)); 823: extern enum reg_class reg_alternate_class PROTO((int)); 1.1 root 824: 1.1.1.4 root 825: extern rtx get_first_nonparm_insn PROTO((void)); 1.1 root 826: 827: /* Standard pieces of rtx, to be substituted directly into things. */ 828: extern rtx pc_rtx; 829: extern rtx cc0_rtx; 830: extern rtx const0_rtx; 831: extern rtx const1_rtx; 832: extern rtx const2_rtx; 833: extern rtx constm1_rtx; 834: extern rtx const_true_rtx; 835: 836: extern rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE]; 837: 838: /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the 839: same as VOIDmode. */ 840: 841: #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)]) 842: 843: /* Likewise, for the constants 1 and 2. */ 844: 845: #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)]) 846: #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)]) 847: 848: /* All references to certain hard regs, except those created 849: by allocating pseudo regs into them (when that's possible), 850: go through these unique rtx objects. */ 851: extern rtx stack_pointer_rtx; 852: extern rtx frame_pointer_rtx; 1.1.1.6 root 853: extern rtx hard_frame_pointer_rtx; 1.1 root 854: extern rtx arg_pointer_rtx; 855: extern rtx pic_offset_table_rtx; 856: extern rtx struct_value_rtx; 857: extern rtx struct_value_incoming_rtx; 858: extern rtx static_chain_rtx; 859: extern rtx static_chain_incoming_rtx; 860: 1.1.1.6 root 861: /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg 862: is used to represent the frame pointer. This is because the 863: hard frame pointer and the automatic variables are separated by an amount 864: that cannot be determined until after register allocation. We can assume 865: that in this case ELIMINABLE_REGS will be defined, one action of which 866: will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */ 867: #ifndef HARD_FRAME_POINTER_REGNUM 868: #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM 869: #endif 870: 1.1 root 871: /* Virtual registers are used during RTL generation to refer to locations into 872: the stack frame when the actual location isn't known until RTL generation 873: is complete. The routine instantiate_virtual_regs replaces these with 874: the proper value, which is normally {frame,arg,stack}_pointer_rtx plus 875: a constant. */ 876: 877: #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER) 878: 879: /* This points to the first word of the incoming arguments passed on the stack, 880: either by the caller or by the callee when pretending it was passed by the 881: caller. */ 882: 883: extern rtx virtual_incoming_args_rtx; 884: 885: #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER) 886: 1.1.1.6 root 887: /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first 1.1 root 888: variable on the stack. Otherwise, it points to the first variable on 889: the stack. */ 890: 891: extern rtx virtual_stack_vars_rtx; 892: 893: #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1) 894: 895: /* This points to the location of dynamically-allocated memory on the stack 896: immediately after the stack pointer has been adjusted by the amount 897: desired. */ 898: 899: extern rtx virtual_stack_dynamic_rtx; 900: 901: #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2) 902: 903: /* This points to the location in the stack at which outgoing arguments should 904: be written when the stack is pre-pushed (arguments pushed using push 905: insns always use sp). */ 906: 907: extern rtx virtual_outgoing_args_rtx; 908: 909: #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3) 910: 911: #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 3) 912: 1.1.1.4 root 913: extern rtx find_next_ref PROTO((rtx, rtx)); 914: extern rtx *find_single_use PROTO((rtx, rtx, rtx *)); 915: 916: /* It is hard to write the prototype for expand_expr, since it needs 917: expr.h to be included for the enumeration. */ 918: 919: extern rtx expand_expr (); 920: 1.1.1.7 ! root 921: extern rtx output_constant_def PROTO((union tree_node *)); ! 922: extern rtx immed_real_const PROTO((union tree_node *)); ! 923: extern union tree_node *make_tree PROTO((union tree_node *, rtx)); ! 924: ! 925: /* Abort routines */ ! 926: extern void fatal_insn_not_found PROTO((rtx)); ! 927: extern void fatal_insn PROTO((char *, rtx)); 1.1 root 928: 929: /* Define a default value for STORE_FLAG_VALUE. */ 930: 931: #ifndef STORE_FLAG_VALUE 932: #define STORE_FLAG_VALUE 1 933: #endif 934: 935: /* Nonzero after end of reload pass. 936: Set to 1 or 0 by toplev.c. */ 937: 938: extern int reload_completed; 939: 940: /* Set to 1 while reload_as_needed is operating. 941: Required by some machines to handle any generated moves differently. */ 942: 943: extern int reload_in_progress; 944: 945: /* If this is nonzero, we do not bother generating VOLATILE 946: around volatile memory references, and we are willing to 947: output indirect addresses. If cse is to follow, we reject 948: indirect addresses so a useful potential cse is generated; 949: if it is used only once, instruction combination will produce 950: the same indirect address eventually. */ 951: extern int cse_not_expected; 952: 953: /* Indexed by pseudo register number, gives the rtx for that pseudo. 954: Allocated in parallel with regno_pointer_flag. */ 955: extern rtx *regno_reg_rtx; 1.1.1.5 root 956: 957: /* Translates rtx code to tree code, for those codes needed by 1.1.1.7 ! root 958: REAL_ARITHMETIC. The function returns an int because the caller may not ! 959: know what `enum tree_code' means. */ ! 960: ! 961: extern int rtx_to_tree_code PROTO((enum rtx_code));
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