[8833] | 1 | /* Register Transfer Language (RTL) definitions for GNU C-Compiler |
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| 2 | Copyright (C) 1987, 91, 92, 93, 94, 1995 Free Software Foundation, Inc. |
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| 3 | |
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| 4 | This file is part of GNU CC. |
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| 5 | |
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| 6 | GNU CC is free software; you can redistribute it and/or modify |
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| 7 | it under the terms of the GNU General Public License as published by |
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| 8 | the Free Software Foundation; either version 2, or (at your option) |
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| 9 | any later version. |
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| 10 | |
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| 11 | GNU CC is distributed in the hope that it will be useful, |
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 14 | GNU General Public License for more details. |
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| 15 | |
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| 16 | You should have received a copy of the GNU General Public License |
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| 17 | along with GNU CC; see the file COPYING. If not, write to |
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| 18 | the Free Software Foundation, 59 Temple Place - Suite 330, |
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| 19 | Boston, MA 02111-1307, USA. */ |
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| 20 | |
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| 21 | |
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| 22 | #include "machmode.h" |
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| 23 | |
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| 24 | #undef FFS /* Some systems predefine this symbol; don't let it interfere. */ |
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| 25 | #undef FLOAT /* Likewise. */ |
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| 26 | #undef ABS /* Likewise. */ |
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| 27 | #undef PC /* Likewise. */ |
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| 28 | |
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| 29 | #ifndef TREE_CODE |
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| 30 | union tree_node; |
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| 31 | #endif |
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| 32 | |
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| 33 | /* Register Transfer Language EXPRESSIONS CODES */ |
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| 34 | |
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| 35 | #define RTX_CODE enum rtx_code |
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| 36 | enum rtx_code { |
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| 37 | |
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| 38 | #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM , |
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| 39 | #include "rtl.def" /* rtl expressions are documented here */ |
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| 40 | #undef DEF_RTL_EXPR |
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| 41 | |
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| 42 | LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for |
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| 43 | NUM_RTX_CODE. |
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| 44 | Assumes default enum value assignment. */ |
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| 45 | |
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| 46 | #define NUM_RTX_CODE ((int)LAST_AND_UNUSED_RTX_CODE) |
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| 47 | /* The cast here, saves many elsewhere. */ |
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| 48 | |
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| 49 | extern int rtx_length[]; |
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| 50 | #define GET_RTX_LENGTH(CODE) (rtx_length[(int)(CODE)]) |
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| 51 | |
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| 52 | extern char *rtx_name[]; |
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| 53 | #define GET_RTX_NAME(CODE) (rtx_name[(int)(CODE)]) |
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| 54 | |
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| 55 | extern char *rtx_format[]; |
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| 56 | #define GET_RTX_FORMAT(CODE) (rtx_format[(int)(CODE)]) |
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| 57 | |
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| 58 | extern char rtx_class[]; |
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| 59 | #define GET_RTX_CLASS(CODE) (rtx_class[(int)(CODE)]) |
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| 60 | |
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| 61 | /* Common union for an element of an rtx. */ |
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| 62 | |
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| 63 | typedef union rtunion_def |
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| 64 | { |
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| 65 | HOST_WIDE_INT rtwint; |
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| 66 | int rtint; |
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| 67 | char *rtstr; |
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| 68 | struct rtx_def *rtx; |
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| 69 | struct rtvec_def *rtvec; |
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| 70 | enum machine_mode rttype; |
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| 71 | } rtunion; |
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| 72 | |
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| 73 | /* RTL expression ("rtx"). */ |
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| 74 | |
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| 75 | typedef struct rtx_def |
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| 76 | { |
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| 77 | #ifdef ONLY_INT_FIELDS |
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| 78 | #ifdef CODE_FIELD_BUG |
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| 79 | unsigned int code : 16; |
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| 80 | #else |
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| 81 | unsigned short code; |
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| 82 | #endif |
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| 83 | #else |
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| 84 | /* The kind of expression this is. */ |
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| 85 | enum rtx_code code : 16; |
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| 86 | #endif |
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| 87 | /* The kind of value the expression has. */ |
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| 88 | #ifdef ONLY_INT_FIELDS |
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| 89 | int mode : 8; |
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| 90 | #else |
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| 91 | enum machine_mode mode : 8; |
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| 92 | #endif |
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| 93 | /* 1 in an INSN if it can alter flow of control |
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| 94 | within this function. Not yet used! */ |
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| 95 | unsigned int jump : 1; |
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| 96 | /* 1 in an INSN if it can call another function. Not yet used! */ |
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| 97 | unsigned int call : 1; |
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| 98 | /* 1 in a MEM or REG if value of this expression will never change |
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| 99 | during the current function, even though it is not |
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| 100 | manifestly constant. |
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| 101 | 1 in a SUBREG if it is from a promoted variable that is unsigned. |
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| 102 | 1 in a SYMBOL_REF if it addresses something in the per-function |
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| 103 | constants pool. |
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| 104 | 1 in a CALL_INSN if it is a const call. |
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| 105 | 1 in a JUMP_INSN if it is a branch that should be annulled. Valid from |
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| 106 | reorg until end of compilation; cleared before used. */ |
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| 107 | unsigned int unchanging : 1; |
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| 108 | /* 1 in a MEM expression if contents of memory are volatile. |
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| 109 | 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL or BARRIER |
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| 110 | if it is deleted. |
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| 111 | 1 in a REG expression if corresponds to a variable declared by the user. |
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| 112 | 0 for an internally generated temporary. |
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| 113 | In a SYMBOL_REF, this flag is used for machine-specific purposes. |
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| 114 | In a LABEL_REF or in a REG_LABEL note, this is LABEL_REF_NONLOCAL_P. */ |
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| 115 | unsigned int volatil : 1; |
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| 116 | /* 1 in a MEM referring to a field of a structure (not a union!). |
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| 117 | 0 if the MEM was a variable or the result of a * operator in C; |
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| 118 | 1 if it was the result of a . or -> operator (on a struct) in C. |
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| 119 | 1 in a REG if the register is used only in exit code a loop. |
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| 120 | 1 in a SUBREG expression if was generated from a variable with a |
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| 121 | promoted mode. |
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| 122 | 1 in a CODE_LABEL if the label is used for nonlocal gotos |
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| 123 | and must not be deleted even if its count is zero. |
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| 124 | 1 in a LABEL_REF if this is a reference to a label outside the |
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| 125 | current loop. |
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| 126 | 1 in an INSN, JUMP_INSN, or CALL_INSN if this insn must be scheduled |
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| 127 | together with the preceding insn. Valid only within sched. |
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| 128 | 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and |
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| 129 | from the target of a branch. Valid from reorg until end of compilation; |
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| 130 | cleared before used. */ |
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| 131 | unsigned int in_struct : 1; |
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| 132 | /* 1 if this rtx is used. This is used for copying shared structure. |
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| 133 | See `unshare_all_rtl'. |
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| 134 | In a REG, this is not needed for that purpose, and used instead |
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| 135 | in `leaf_renumber_regs_insn'. |
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| 136 | In a SYMBOL_REF, means that emit_library_call |
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| 137 | has used it as the function. */ |
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| 138 | unsigned int used : 1; |
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| 139 | /* Nonzero if this rtx came from procedure integration. |
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| 140 | In a REG, nonzero means this reg refers to the return value |
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| 141 | of the current function. */ |
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| 142 | unsigned integrated : 1; |
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| 143 | /* The first element of the operands of this rtx. |
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| 144 | The number of operands and their types are controlled |
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| 145 | by the `code' field, according to rtl.def. */ |
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| 146 | rtunion fld[1]; |
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| 147 | } *rtx; |
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| 148 | |
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| 149 | |
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| 150 | /* Add prototype support. */ |
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| 151 | #ifndef PROTO |
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| 152 | #if defined (USE_PROTOTYPES) ? USE_PROTOTYPES : defined (__STDC__) |
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| 153 | #define PROTO(ARGS) ARGS |
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| 154 | #else |
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| 155 | #define PROTO(ARGS) () |
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| 156 | #endif |
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| 157 | #endif |
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| 158 | |
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| 159 | #ifndef VPROTO |
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| 160 | #ifdef __STDC__ |
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| 161 | #define PVPROTO(ARGS) ARGS |
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| 162 | #define VPROTO(ARGS) ARGS |
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| 163 | #define VA_START(va_list,var) va_start(va_list,var) |
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| 164 | #else |
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| 165 | #define PVPROTO(ARGS) () |
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| 166 | #define VPROTO(ARGS) (va_alist) va_dcl |
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| 167 | #define VA_START(va_list,var) va_start(va_list) |
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| 168 | #endif |
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| 169 | #endif |
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| 170 | |
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| 171 | #ifndef STDIO_PROTO |
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| 172 | #ifdef BUFSIZ |
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| 173 | #define STDIO_PROTO(ARGS) PROTO(ARGS) |
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| 174 | #else |
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| 175 | #define STDIO_PROTO(ARGS) () |
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| 176 | #endif |
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| 177 | #endif |
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| 178 | |
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| 179 | #define NULL_RTX (rtx) 0 |
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| 180 | |
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| 181 | /* Define a generic NULL if one hasn't already been defined. */ |
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| 182 | |
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| 183 | #ifndef NULL |
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| 184 | #define NULL 0 |
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| 185 | #endif |
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| 186 | |
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| 187 | #ifndef GENERIC_PTR |
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| 188 | #if defined (USE_PROTOTYPES) ? USE_PROTOTYPES : defined (__STDC__) |
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| 189 | #define GENERIC_PTR void * |
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| 190 | #else |
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| 191 | #define GENERIC_PTR char * |
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| 192 | #endif |
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| 193 | #endif |
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| 194 | |
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| 195 | #ifndef NULL_PTR |
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| 196 | #define NULL_PTR ((GENERIC_PTR)0) |
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| 197 | #endif |
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| 198 | |
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| 199 | /* Define macros to access the `code' field of the rtx. */ |
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| 200 | |
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| 201 | #ifdef SHORT_ENUM_BUG |
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| 202 | #define GET_CODE(RTX) ((enum rtx_code) ((RTX)->code)) |
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| 203 | #define PUT_CODE(RTX, CODE) ((RTX)->code = ((short) (CODE))) |
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| 204 | #else |
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| 205 | #define GET_CODE(RTX) ((RTX)->code) |
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| 206 | #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE)) |
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| 207 | #endif |
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| 208 | |
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| 209 | #define GET_MODE(RTX) ((RTX)->mode) |
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| 210 | #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE)) |
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| 211 | |
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| 212 | #define RTX_INTEGRATED_P(RTX) ((RTX)->integrated) |
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| 213 | #define RTX_UNCHANGING_P(RTX) ((RTX)->unchanging) |
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| 214 | |
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| 215 | /* RTL vector. These appear inside RTX's when there is a need |
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| 216 | for a variable number of things. The principle use is inside |
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| 217 | PARALLEL expressions. */ |
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| 218 | |
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| 219 | typedef struct rtvec_def{ |
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| 220 | unsigned num_elem; /* number of elements */ |
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| 221 | rtunion elem[1]; |
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| 222 | } *rtvec; |
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| 223 | |
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| 224 | #define NULL_RTVEC (rtvec) 0 |
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| 225 | |
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| 226 | #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem) |
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| 227 | #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (unsigned) NUM) |
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| 228 | |
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| 229 | #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[(I)].rtx) |
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| 230 | |
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| 231 | /* 1 if X is a REG. */ |
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| 232 | |
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| 233 | #define REG_P(X) (GET_CODE (X) == REG) |
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| 234 | |
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| 235 | /* 1 if X is a constant value that is an integer. */ |
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| 236 | |
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| 237 | #define CONSTANT_P(X) \ |
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| 238 | (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \ |
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| 239 | || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE \ |
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| 240 | || GET_CODE (X) == CONST || GET_CODE (X) == HIGH) |
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| 241 | |
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| 242 | /* General accessor macros for accessing the fields of an rtx. */ |
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| 243 | |
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| 244 | #define XEXP(RTX, N) ((RTX)->fld[N].rtx) |
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| 245 | #define XINT(RTX, N) ((RTX)->fld[N].rtint) |
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| 246 | #define XWINT(RTX, N) ((RTX)->fld[N].rtwint) |
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| 247 | #define XSTR(RTX, N) ((RTX)->fld[N].rtstr) |
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| 248 | #define XVEC(RTX, N) ((RTX)->fld[N].rtvec) |
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| 249 | #define XVECLEN(RTX, N) ((RTX)->fld[N].rtvec->num_elem) |
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| 250 | #define XVECEXP(RTX,N,M)((RTX)->fld[N].rtvec->elem[M].rtx) |
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| 251 | |
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| 252 | /* ACCESS MACROS for particular fields of insns. */ |
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| 253 | |
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| 254 | /* Holds a unique number for each insn. |
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| 255 | These are not necessarily sequentially increasing. */ |
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| 256 | #define INSN_UID(INSN) ((INSN)->fld[0].rtint) |
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| 257 | |
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| 258 | /* Chain insns together in sequence. */ |
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| 259 | #define PREV_INSN(INSN) ((INSN)->fld[1].rtx) |
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| 260 | #define NEXT_INSN(INSN) ((INSN)->fld[2].rtx) |
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| 261 | |
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| 262 | /* The body of an insn. */ |
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| 263 | #define PATTERN(INSN) ((INSN)->fld[3].rtx) |
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| 264 | |
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| 265 | /* Code number of instruction, from when it was recognized. |
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| 266 | -1 means this instruction has not been recognized yet. */ |
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| 267 | #define INSN_CODE(INSN) ((INSN)->fld[4].rtint) |
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| 268 | |
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| 269 | /* Set up in flow.c; empty before then. |
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| 270 | Holds a chain of INSN_LIST rtx's whose first operands point at |
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| 271 | previous insns with direct data-flow connections to this one. |
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| 272 | That means that those insns set variables whose next use is in this insn. |
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| 273 | They are always in the same basic block as this insn. */ |
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| 274 | #define LOG_LINKS(INSN) ((INSN)->fld[5].rtx) |
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| 275 | |
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| 276 | /* 1 if insn has been deleted. */ |
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| 277 | #define INSN_DELETED_P(INSN) ((INSN)->volatil) |
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| 278 | |
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| 279 | /* 1 if insn is a call to a const function. */ |
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| 280 | #define CONST_CALL_P(INSN) ((INSN)->unchanging) |
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| 281 | |
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| 282 | /* 1 if insn is a branch that should not unconditionally execute its |
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| 283 | delay slots, i.e., it is an annulled branch. */ |
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| 284 | #define INSN_ANNULLED_BRANCH_P(INSN) ((INSN)->unchanging) |
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| 285 | |
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| 286 | /* 1 if insn is in a delay slot and is from the target of the branch. If |
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| 287 | the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be |
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| 288 | executed if the branch is taken. For annulled branches with this bit |
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| 289 | clear, the insn should be executed only if the branch is not taken. */ |
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| 290 | #define INSN_FROM_TARGET_P(INSN) ((INSN)->in_struct) |
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| 291 | |
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| 292 | /* Holds a list of notes on what this insn does to various REGs. |
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| 293 | It is a chain of EXPR_LIST rtx's, where the second operand |
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| 294 | is the chain pointer and the first operand is the REG being described. |
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| 295 | The mode field of the EXPR_LIST contains not a real machine mode |
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| 296 | but a value that says what this note says about the REG: |
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| 297 | REG_DEAD means that the value in REG dies in this insn (i.e., it is |
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| 298 | not needed past this insn). If REG is set in this insn, the REG_DEAD |
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| 299 | note may, but need not, be omitted. |
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| 300 | REG_INC means that the REG is autoincremented or autodecremented. |
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| 301 | REG_EQUIV describes the insn as a whole; it says that the |
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| 302 | insn sets a register to a constant value or to be equivalent to |
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| 303 | a memory address. If the |
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| 304 | register is spilled to the stack then the constant value |
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| 305 | should be substituted for it. The contents of the REG_EQUIV |
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| 306 | is the constant value or memory address, which may be different |
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| 307 | from the source of the SET although it has the same value. |
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| 308 | REG_EQUAL is like REG_EQUIV except that the destination |
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| 309 | is only momentarily equal to the specified rtx. Therefore, it |
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| 310 | cannot be used for substitution; but it can be used for cse. |
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| 311 | REG_RETVAL means that this insn copies the return-value of |
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| 312 | a library call out of the hard reg for return values. This note |
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| 313 | is actually an INSN_LIST and it points to the first insn involved |
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| 314 | in setting up arguments for the call. flow.c uses this to delete |
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| 315 | the entire library call when its result is dead. |
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| 316 | REG_LIBCALL is the inverse of REG_RETVAL: it goes on the first insn |
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| 317 | of the library call and points at the one that has the REG_RETVAL. |
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| 318 | REG_WAS_0 says that the register set in this insn held 0 before the insn. |
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| 319 | The contents of the note is the insn that stored the 0. |
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| 320 | If that insn is deleted or patched to a NOTE, the REG_WAS_0 is inoperative. |
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| 321 | The REG_WAS_0 note is actually an INSN_LIST, not an EXPR_LIST. |
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| 322 | REG_NONNEG means that the register is always nonnegative during |
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| 323 | the containing loop. This is used in branches so that decrement and |
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| 324 | branch instructions terminating on zero can be matched. There must be |
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| 325 | an insn pattern in the md file named `decrement_and_branch_until_zero' |
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| 326 | or else this will never be added to any instructions. |
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| 327 | REG_NO_CONFLICT means there is no conflict *after this insn* |
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| 328 | between the register in the note and the destination of this insn. |
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| 329 | REG_UNUSED identifies a register set in this insn and never used. |
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| 330 | REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use |
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| 331 | CC0, respectively. Normally, these are required to be consecutive insns, |
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| 332 | but we permit putting a cc0-setting insn in the delay slot of a branch |
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| 333 | as long as only one copy of the insn exists. In that case, these notes |
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| 334 | point from one to the other to allow code generation to determine what |
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| 335 | any require information and to properly update CC_STATUS. |
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| 336 | REG_LABEL points to a CODE_LABEL. Used by non-JUMP_INSNs to |
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| 337 | say that the CODE_LABEL contained in the REG_LABEL note is used |
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| 338 | by the insn. |
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| 339 | REG_DEP_ANTI is used in LOG_LINKS which represent anti (write after read) |
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| 340 | dependencies. REG_DEP_OUTPUT is used in LOG_LINKS which represent output |
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| 341 | (write after write) dependencies. Data dependencies, which are the only |
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| 342 | type of LOG_LINK created by flow, are represented by a 0 reg note kind. */ |
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| 343 | |
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| 344 | #define REG_NOTES(INSN) ((INSN)->fld[6].rtx) |
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| 345 | |
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| 346 | /* Don't forget to change reg_note_name in rtl.c. */ |
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| 347 | enum reg_note { REG_DEAD = 1, REG_INC = 2, REG_EQUIV = 3, REG_WAS_0 = 4, |
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| 348 | REG_EQUAL = 5, REG_RETVAL = 6, REG_LIBCALL = 7, |
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| 349 | REG_NONNEG = 8, REG_NO_CONFLICT = 9, REG_UNUSED = 10, |
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| 350 | REG_CC_SETTER = 11, REG_CC_USER = 12, REG_LABEL = 13, |
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| 351 | REG_DEP_ANTI = 14, REG_DEP_OUTPUT = 15 }; |
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| 352 | |
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| 353 | /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */ |
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| 354 | #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK)) |
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| 355 | #define PUT_REG_NOTE_KIND(LINK,KIND) PUT_MODE(LINK, (enum machine_mode) (KIND)) |
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| 356 | |
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| 357 | /* Names for REG_NOTE's in EXPR_LIST insn's. */ |
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| 358 | |
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| 359 | extern char *reg_note_name[]; |
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| 360 | #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int)(MODE)]) |
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| 361 | |
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| 362 | /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of |
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| 363 | USE and CLOBBER expressions. |
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| 364 | USE expressions list the registers filled with arguments that |
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| 365 | are passed to the function. |
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| 366 | CLOBBER expressions document the registers explicitly clobbered |
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| 367 | by this CALL_INSN. |
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| 368 | Pseudo registers can not be mentioned in this list. */ |
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| 369 | #define CALL_INSN_FUNCTION_USAGE(INSN) ((INSN)->fld[7].rtx) |
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| 370 | |
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| 371 | /* The label-number of a code-label. The assembler label |
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| 372 | is made from `L' and the label-number printed in decimal. |
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| 373 | Label numbers are unique in a compilation. */ |
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| 374 | #define CODE_LABEL_NUMBER(INSN) ((INSN)->fld[3].rtint) |
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| 375 | |
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| 376 | #define LINE_NUMBER NOTE |
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| 377 | |
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| 378 | /* In a NOTE that is a line number, this is a string for the file name |
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| 379 | that the line is in. We use the same field to record block numbers |
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| 380 | temporarily in NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. |
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| 381 | (We avoid lots of casts between ints and pointers if we use a |
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| 382 | different macro for the bock number.) */ |
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| 383 | |
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| 384 | #define NOTE_SOURCE_FILE(INSN) ((INSN)->fld[3].rtstr) |
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| 385 | #define NOTE_BLOCK_NUMBER(INSN) ((INSN)->fld[3].rtint) |
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| 386 | |
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| 387 | /* In a NOTE that is a line number, this is the line number. |
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| 388 | Other kinds of NOTEs are identified by negative numbers here. */ |
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| 389 | #define NOTE_LINE_NUMBER(INSN) ((INSN)->fld[4].rtint) |
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| 390 | |
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| 391 | /* Codes that appear in the NOTE_LINE_NUMBER field |
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| 392 | for kinds of notes that are not line numbers. |
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| 393 | |
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| 394 | Notice that we do not try to use zero here for any of |
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| 395 | the special note codes because sometimes the source line |
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| 396 | actually can be zero! This happens (for example) when we |
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| 397 | are generating code for the per-translation-unit constructor |
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| 398 | and destructor routines for some C++ translation unit. |
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| 399 | |
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| 400 | If you should change any of the following values, or if you |
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| 401 | should add a new value here, don't forget to change the |
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| 402 | note_insn_name array in rtl.c. */ |
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| 403 | |
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| 404 | /* This note is used to get rid of an insn |
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| 405 | when it isn't safe to patch the insn out of the chain. */ |
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| 406 | #define NOTE_INSN_DELETED -1 |
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| 407 | #define NOTE_INSN_BLOCK_BEG -2 |
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| 408 | #define NOTE_INSN_BLOCK_END -3 |
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| 409 | #define NOTE_INSN_LOOP_BEG -4 |
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| 410 | #define NOTE_INSN_LOOP_END -5 |
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| 411 | /* This kind of note is generated at the end of the function body, |
---|
| 412 | just before the return insn or return label. |
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| 413 | In an optimizing compilation it is deleted by the first jump optimization, |
---|
| 414 | after enabling that optimizer to determine whether control can fall |
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| 415 | off the end of the function body without a return statement. */ |
---|
| 416 | #define NOTE_INSN_FUNCTION_END -6 |
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| 417 | /* This kind of note is generated just after each call to `setjmp', et al. */ |
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| 418 | #define NOTE_INSN_SETJMP -7 |
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| 419 | /* Generated at the place in a loop that `continue' jumps to. */ |
---|
| 420 | #define NOTE_INSN_LOOP_CONT -8 |
---|
| 421 | /* Generated at the start of a duplicated exit test. */ |
---|
| 422 | #define NOTE_INSN_LOOP_VTOP -9 |
---|
| 423 | /* This marks the point immediately after the last prologue insn. */ |
---|
| 424 | #define NOTE_INSN_PROLOGUE_END -10 |
---|
| 425 | /* This marks the point immediately prior to the first epilogue insn. */ |
---|
| 426 | #define NOTE_INSN_EPILOGUE_BEG -11 |
---|
| 427 | /* Generated in place of user-declared labels when they are deleted. */ |
---|
| 428 | #define NOTE_INSN_DELETED_LABEL -12 |
---|
| 429 | /* This note indicates the start of the real body of the function, |
---|
| 430 | i.e. the point just after all of the parms have been moved into |
---|
| 431 | their homes, etc. */ |
---|
| 432 | #define NOTE_INSN_FUNCTION_BEG -13 |
---|
| 433 | |
---|
| 434 | |
---|
| 435 | #if 0 /* These are not used, and I don't know what they were for. --rms. */ |
---|
| 436 | #define NOTE_DECL_NAME(INSN) ((INSN)->fld[3].rtstr) |
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| 437 | #define NOTE_DECL_CODE(INSN) ((INSN)->fld[4].rtint) |
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| 438 | #define NOTE_DECL_RTL(INSN) ((INSN)->fld[5].rtx) |
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| 439 | #define NOTE_DECL_IDENTIFIER(INSN) ((INSN)->fld[6].rtint) |
---|
| 440 | #define NOTE_DECL_TYPE(INSN) ((INSN)->fld[7].rtint) |
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| 441 | #endif /* 0 */ |
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| 442 | |
---|
| 443 | /* Names for NOTE insn's other than line numbers. */ |
---|
| 444 | |
---|
| 445 | extern char *note_insn_name[]; |
---|
| 446 | #define GET_NOTE_INSN_NAME(NOTE_CODE) (note_insn_name[-(NOTE_CODE)]) |
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| 447 | |
---|
| 448 | /* The name of a label, in case it corresponds to an explicit label |
---|
| 449 | in the input source code. */ |
---|
| 450 | #define LABEL_NAME(LABEL) ((LABEL)->fld[4].rtstr) |
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| 451 | |
---|
| 452 | /* In jump.c, each label contains a count of the number |
---|
| 453 | of LABEL_REFs that point at it, so unused labels can be deleted. */ |
---|
| 454 | #define LABEL_NUSES(LABEL) ((LABEL)->fld[5].rtint) |
---|
| 455 | |
---|
| 456 | /* The rest is used instead of the above, in a CODE_LABEL, |
---|
| 457 | if bytecode is being output. |
---|
| 458 | We make the slightly kludgy assumption that a LABEL has enough slots |
---|
| 459 | to hold these things. That happens to be true. */ |
---|
| 460 | |
---|
| 461 | /* For static or external objects. */ |
---|
| 462 | #define BYTECODE_LABEL(X) (XEXP ((X), 0)) |
---|
| 463 | |
---|
| 464 | /* For goto labels inside bytecode functions. */ |
---|
| 465 | #define BYTECODE_BC_LABEL(X) (*(struct bc_label **) &XEXP ((X), 1)) |
---|
| 466 | |
---|
| 467 | /* In jump.c, each JUMP_INSN can point to a label that it can jump to, |
---|
| 468 | so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can |
---|
| 469 | be decremented and possibly the label can be deleted. */ |
---|
| 470 | #define JUMP_LABEL(INSN) ((INSN)->fld[7].rtx) |
---|
| 471 | |
---|
| 472 | /* Once basic blocks are found in flow.c, |
---|
| 473 | each CODE_LABEL starts a chain that goes through |
---|
| 474 | all the LABEL_REFs that jump to that label. |
---|
| 475 | The chain eventually winds up at the CODE_LABEL; it is circular. */ |
---|
| 476 | #define LABEL_REFS(LABEL) ((LABEL)->fld[5].rtx) |
---|
| 477 | |
---|
| 478 | /* This is the field in the LABEL_REF through which the circular chain |
---|
| 479 | of references to a particular label is linked. |
---|
| 480 | This chain is set up in flow.c. */ |
---|
| 481 | |
---|
| 482 | #define LABEL_NEXTREF(REF) ((REF)->fld[1].rtx) |
---|
| 483 | |
---|
| 484 | /* Once basic blocks are found in flow.c, |
---|
| 485 | Each LABEL_REF points to its containing instruction with this field. */ |
---|
| 486 | |
---|
| 487 | #define CONTAINING_INSN(RTX) ((RTX)->fld[2].rtx) |
---|
| 488 | |
---|
| 489 | /* For a REG rtx, REGNO extracts the register number. */ |
---|
| 490 | |
---|
| 491 | #define REGNO(RTX) ((RTX)->fld[0].rtint) |
---|
| 492 | |
---|
| 493 | /* For a REG rtx, REG_FUNCTION_VALUE_P is nonzero if the reg |
---|
| 494 | is the current function's return value. */ |
---|
| 495 | |
---|
| 496 | #define REG_FUNCTION_VALUE_P(RTX) ((RTX)->integrated) |
---|
| 497 | |
---|
| 498 | /* 1 in a REG rtx if it corresponds to a variable declared by the user. */ |
---|
| 499 | #define REG_USERVAR_P(RTX) ((RTX)->volatil) |
---|
| 500 | |
---|
| 501 | /* For a CONST_INT rtx, INTVAL extracts the integer. */ |
---|
| 502 | |
---|
| 503 | #define INTVAL(RTX) ((RTX)->fld[0].rtwint) |
---|
| 504 | |
---|
| 505 | /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of. |
---|
| 506 | SUBREG_WORD extracts the word-number. */ |
---|
| 507 | |
---|
| 508 | #define SUBREG_REG(RTX) ((RTX)->fld[0].rtx) |
---|
| 509 | #define SUBREG_WORD(RTX) ((RTX)->fld[1].rtint) |
---|
| 510 | |
---|
| 511 | /* 1 if the REG contained in SUBREG_REG is already known to be |
---|
| 512 | sign- or zero-extended from the mode of the SUBREG to the mode of |
---|
| 513 | the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the |
---|
| 514 | extension. |
---|
| 515 | |
---|
| 516 | When used as a LHS, is means that this extension must be done |
---|
| 517 | when assigning to SUBREG_REG. */ |
---|
| 518 | |
---|
| 519 | #define SUBREG_PROMOTED_VAR_P(RTX) ((RTX)->in_struct) |
---|
| 520 | #define SUBREG_PROMOTED_UNSIGNED_P(RTX) ((RTX)->unchanging) |
---|
| 521 | |
---|
| 522 | /* Access various components of an ASM_OPERANDS rtx. */ |
---|
| 523 | |
---|
| 524 | #define ASM_OPERANDS_TEMPLATE(RTX) XSTR ((RTX), 0) |
---|
| 525 | #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XSTR ((RTX), 1) |
---|
| 526 | #define ASM_OPERANDS_OUTPUT_IDX(RTX) XINT ((RTX), 2) |
---|
| 527 | #define ASM_OPERANDS_INPUT_VEC(RTX) XVEC ((RTX), 3) |
---|
| 528 | #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XVEC ((RTX), 4) |
---|
| 529 | #define ASM_OPERANDS_INPUT(RTX, N) XVECEXP ((RTX), 3, (N)) |
---|
| 530 | #define ASM_OPERANDS_INPUT_LENGTH(RTX) XVECLEN ((RTX), 3) |
---|
| 531 | #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) XSTR (XVECEXP ((RTX), 4, (N)), 0) |
---|
| 532 | #define ASM_OPERANDS_INPUT_MODE(RTX, N) GET_MODE (XVECEXP ((RTX), 4, (N))) |
---|
| 533 | #define ASM_OPERANDS_SOURCE_FILE(RTX) XSTR ((RTX), 5) |
---|
| 534 | #define ASM_OPERANDS_SOURCE_LINE(RTX) XINT ((RTX), 6) |
---|
| 535 | |
---|
| 536 | /* For a MEM rtx, 1 if it's a volatile reference. |
---|
| 537 | Also in an ASM_OPERANDS rtx. */ |
---|
| 538 | #define MEM_VOLATILE_P(RTX) ((RTX)->volatil) |
---|
| 539 | |
---|
| 540 | /* For a MEM rtx, 1 if it refers to a structure or union component. */ |
---|
| 541 | #define MEM_IN_STRUCT_P(RTX) ((RTX)->in_struct) |
---|
| 542 | |
---|
| 543 | /* For a LABEL_REF, 1 means that this reference is to a label outside the |
---|
| 544 | loop containing the reference. */ |
---|
| 545 | #define LABEL_OUTSIDE_LOOP_P(RTX) ((RTX)->in_struct) |
---|
| 546 | |
---|
| 547 | /* For a LABEL_REF, 1 means it is for a nonlocal label. */ |
---|
| 548 | /* Likewise in an EXPR_LIST for a REG_LABEL note. */ |
---|
| 549 | #define LABEL_REF_NONLOCAL_P(RTX) ((RTX)->volatil) |
---|
| 550 | |
---|
| 551 | /* For a CODE_LABEL, 1 means always consider this label to be needed. */ |
---|
| 552 | #define LABEL_PRESERVE_P(RTX) ((RTX)->in_struct) |
---|
| 553 | |
---|
| 554 | /* For a REG, 1 means the register is used only in an exit test of a loop. */ |
---|
| 555 | #define REG_LOOP_TEST_P(RTX) ((RTX)->in_struct) |
---|
| 556 | |
---|
| 557 | /* During sched, for an insn, 1 means that the insn must be scheduled together |
---|
| 558 | with the preceding insn. */ |
---|
| 559 | #define SCHED_GROUP_P(INSN) ((INSN)->in_struct) |
---|
| 560 | |
---|
| 561 | /* During sched, for the LOG_LINKS of an insn, these cache the adjusted |
---|
| 562 | cost of the dependence link. The cost of executing an instruction |
---|
| 563 | may vary based on how the results are used. LINK_COST_ZERO is 1 when |
---|
| 564 | the cost through the link varies and is unchanged (i.e., the link has |
---|
| 565 | zero additional cost). LINK_COST_FREE is 1 when the cost through the |
---|
| 566 | link is zero (i.e., the link makes the cost free). In other cases, |
---|
| 567 | the adjustment to the cost is recomputed each time it is needed. */ |
---|
| 568 | #define LINK_COST_ZERO(X) ((X)->jump) |
---|
| 569 | #define LINK_COST_FREE(X) ((X)->call) |
---|
| 570 | |
---|
| 571 | /* For a SET rtx, SET_DEST is the place that is set |
---|
| 572 | and SET_SRC is the value it is set to. */ |
---|
| 573 | #define SET_DEST(RTX) ((RTX)->fld[0].rtx) |
---|
| 574 | #define SET_SRC(RTX) ((RTX)->fld[1].rtx) |
---|
| 575 | |
---|
| 576 | /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */ |
---|
| 577 | #define TRAP_CONDITION(RTX) ((RTX)->fld[0].rtx) |
---|
| 578 | |
---|
| 579 | /* 1 in a SYMBOL_REF if it addresses this function's constants pool. */ |
---|
| 580 | #define CONSTANT_POOL_ADDRESS_P(RTX) ((RTX)->unchanging) |
---|
| 581 | |
---|
| 582 | /* Flag in a SYMBOL_REF for machine-specific purposes. */ |
---|
| 583 | #define SYMBOL_REF_FLAG(RTX) ((RTX)->volatil) |
---|
| 584 | |
---|
| 585 | /* 1 means a SYMBOL_REF has been the library function in emit_library_call. */ |
---|
| 586 | #define SYMBOL_REF_USED(RTX) ((RTX)->used) |
---|
| 587 | |
---|
| 588 | /* For an INLINE_HEADER rtx, FIRST_FUNCTION_INSN is the first insn |
---|
| 589 | of the function that is not involved in copying parameters to |
---|
| 590 | pseudo-registers. FIRST_PARM_INSN is the very first insn of |
---|
| 591 | the function, including the parameter copying. |
---|
| 592 | We keep this around in case we must splice |
---|
| 593 | this function into the assembly code at the end of the file. |
---|
| 594 | FIRST_LABELNO is the first label number used by the function (inclusive). |
---|
| 595 | LAST_LABELNO is the last label used by the function (exclusive). |
---|
| 596 | MAX_REGNUM is the largest pseudo-register used by that function. |
---|
| 597 | FUNCTION_ARGS_SIZE is the size of the argument block in the stack. |
---|
| 598 | POPS_ARGS is the number of bytes of input arguments popped by the function |
---|
| 599 | STACK_SLOT_LIST is the list of stack slots. |
---|
| 600 | FORCED_LABELS is the list of labels whose address was taken. |
---|
| 601 | FUNCTION_FLAGS are where single-bit flags are saved. |
---|
| 602 | OUTGOING_ARGS_SIZE is the size of the largest outgoing stack parameter list. |
---|
| 603 | ORIGINAL_ARG_VECTOR is a vector of the original DECL_RTX values |
---|
| 604 | for the function arguments. |
---|
| 605 | ORIGINAL_DECL_INITIAL is a pointer to the original DECL_INITIAL for the |
---|
| 606 | function. |
---|
| 607 | |
---|
| 608 | We want this to lay down like an INSN. The PREV_INSN field |
---|
| 609 | is always NULL. The NEXT_INSN field always points to the |
---|
| 610 | first function insn of the function being squirreled away. */ |
---|
| 611 | |
---|
| 612 | #define FIRST_FUNCTION_INSN(RTX) ((RTX)->fld[2].rtx) |
---|
| 613 | #define FIRST_PARM_INSN(RTX) ((RTX)->fld[3].rtx) |
---|
| 614 | #define FIRST_LABELNO(RTX) ((RTX)->fld[4].rtint) |
---|
| 615 | #define LAST_LABELNO(RTX) ((RTX)->fld[5].rtint) |
---|
| 616 | #define MAX_PARMREG(RTX) ((RTX)->fld[6].rtint) |
---|
| 617 | #define MAX_REGNUM(RTX) ((RTX)->fld[7].rtint) |
---|
| 618 | #define FUNCTION_ARGS_SIZE(RTX) ((RTX)->fld[8].rtint) |
---|
| 619 | #define POPS_ARGS(RTX) ((RTX)->fld[9].rtint) |
---|
| 620 | #define STACK_SLOT_LIST(RTX) ((RTX)->fld[10].rtx) |
---|
| 621 | #define FORCED_LABELS(RTX) ((RTX)->fld[11].rtx) |
---|
| 622 | #define FUNCTION_FLAGS(RTX) ((RTX)->fld[12].rtint) |
---|
| 623 | #define OUTGOING_ARGS_SIZE(RTX) ((RTX)->fld[13].rtint) |
---|
| 624 | #define ORIGINAL_ARG_VECTOR(RTX) ((RTX)->fld[14].rtvec) |
---|
| 625 | #define ORIGINAL_DECL_INITIAL(RTX) ((RTX)->fld[15].rtx) |
---|
| 626 | |
---|
| 627 | /* In FUNCTION_FLAGS we save some variables computed when emitting the code |
---|
| 628 | for the function and which must be `or'ed into the current flag values when |
---|
| 629 | insns from that function are being inlined. */ |
---|
| 630 | |
---|
| 631 | /* These ought to be an enum, but non-ANSI compilers don't like that. */ |
---|
| 632 | #define FUNCTION_FLAGS_CALLS_ALLOCA 01 |
---|
| 633 | #define FUNCTION_FLAGS_CALLS_SETJMP 02 |
---|
| 634 | #define FUNCTION_FLAGS_RETURNS_STRUCT 04 |
---|
| 635 | #define FUNCTION_FLAGS_RETURNS_PCC_STRUCT 010 |
---|
| 636 | #define FUNCTION_FLAGS_NEEDS_CONTEXT 020 |
---|
| 637 | #define FUNCTION_FLAGS_HAS_NONLOCAL_LABEL 040 |
---|
| 638 | #define FUNCTION_FLAGS_RETURNS_POINTER 0100 |
---|
| 639 | #define FUNCTION_FLAGS_USES_CONST_POOL 0200 |
---|
| 640 | #define FUNCTION_FLAGS_CALLS_LONGJMP 0400 |
---|
| 641 | #define FUNCTION_FLAGS_USES_PIC_OFFSET_TABLE 01000 |
---|
| 642 | |
---|
| 643 | /* Define a macro to look for REG_INC notes, |
---|
| 644 | but save time on machines where they never exist. */ |
---|
| 645 | |
---|
| 646 | /* Don't continue this line--convex cc version 4.1 would lose. */ |
---|
| 647 | #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT)) |
---|
| 648 | #define FIND_REG_INC_NOTE(insn, reg) (find_reg_note ((insn), REG_INC, (reg))) |
---|
| 649 | #else |
---|
| 650 | #define FIND_REG_INC_NOTE(insn, reg) 0 |
---|
| 651 | #endif |
---|
| 652 | |
---|
| 653 | /* Indicate whether the machine has any sort of auto increment addressing. |
---|
| 654 | If not, we can avoid checking for REG_INC notes. */ |
---|
| 655 | |
---|
| 656 | /* Don't continue this line--convex cc version 4.1 would lose. */ |
---|
| 657 | #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT)) |
---|
| 658 | #define AUTO_INC_DEC |
---|
| 659 | #endif |
---|
| 660 | |
---|
| 661 | /* Generally useful functions. */ |
---|
| 662 | |
---|
| 663 | /* The following functions accept a wide integer argument. Rather than |
---|
| 664 | having to cast on every function call, we use a macro instead, that is |
---|
| 665 | defined here and in tree.h. */ |
---|
| 666 | |
---|
| 667 | #ifndef exact_log2 |
---|
| 668 | #define exact_log2(N) exact_log2_wide ((HOST_WIDE_INT) (N)) |
---|
| 669 | #define floor_log2(N) floor_log2_wide ((HOST_WIDE_INT) (N)) |
---|
| 670 | #endif |
---|
| 671 | |
---|
| 672 | #define plus_constant(X,C) plus_constant_wide (X, (HOST_WIDE_INT) (C)) |
---|
| 673 | |
---|
| 674 | #define plus_constant_for_output(X,C) \ |
---|
| 675 | plus_constant_for_output_wide (X, (HOST_WIDE_INT) (C)) |
---|
| 676 | |
---|
| 677 | extern rtx plus_constant_wide PROTO((rtx, HOST_WIDE_INT)); |
---|
| 678 | extern rtx plus_constant_for_output_wide PROTO((rtx, HOST_WIDE_INT)); |
---|
| 679 | |
---|
| 680 | #define GEN_INT(N) gen_rtx (CONST_INT, VOIDmode, (HOST_WIDE_INT) (N)) |
---|
| 681 | |
---|
| 682 | extern rtx bc_gen_rtx (); |
---|
| 683 | |
---|
| 684 | extern rtx gen_rtx PVPROTO((enum rtx_code, |
---|
| 685 | enum machine_mode, ...)); |
---|
| 686 | extern rtvec gen_rtvec PVPROTO((int, ...)); |
---|
| 687 | |
---|
| 688 | extern rtx read_rtx STDIO_PROTO((FILE *)); |
---|
| 689 | |
---|
| 690 | #if 0 |
---|
| 691 | /* At present, don't prototype xrealloc, since all of the callers don't |
---|
| 692 | cast their pointers to char *, and all of the xrealloc's don't use |
---|
| 693 | void * yet. */ |
---|
| 694 | extern char *xmalloc PROTO((size_t)); |
---|
| 695 | extern char *xrealloc PROTO((void *, size_t)); |
---|
| 696 | #else |
---|
| 697 | extern char *xmalloc (); |
---|
| 698 | extern char *xrealloc (); |
---|
| 699 | #endif |
---|
| 700 | |
---|
| 701 | extern char *oballoc PROTO((int)); |
---|
| 702 | extern char *permalloc PROTO((int)); |
---|
| 703 | extern void free PROTO((void *)); |
---|
| 704 | extern rtx rtx_alloc PROTO((RTX_CODE)); |
---|
| 705 | extern rtvec rtvec_alloc PROTO((int)); |
---|
| 706 | extern rtx find_reg_note PROTO((rtx, enum reg_note, rtx)); |
---|
| 707 | extern rtx find_regno_note PROTO((rtx, enum reg_note, int)); |
---|
| 708 | extern int find_reg_fusage PROTO((rtx, enum rtx_code, rtx)); |
---|
| 709 | extern int find_regno_fusage PROTO((rtx, enum rtx_code, int)); |
---|
| 710 | extern HOST_WIDE_INT get_integer_term PROTO((rtx)); |
---|
| 711 | extern rtx get_related_value PROTO((rtx)); |
---|
| 712 | extern rtx single_set PROTO((rtx)); |
---|
| 713 | extern rtx find_last_value PROTO((rtx, rtx *, rtx)); |
---|
| 714 | extern rtx copy_rtx PROTO((rtx)); |
---|
| 715 | extern rtx copy_rtx_if_shared PROTO((rtx)); |
---|
| 716 | extern rtx copy_most_rtx PROTO((rtx, rtx)); |
---|
| 717 | extern rtx replace_rtx PROTO((rtx, rtx, rtx)); |
---|
| 718 | extern rtvec gen_rtvec_v PROTO((int, rtx *)); |
---|
| 719 | extern rtx gen_reg_rtx PROTO((enum machine_mode)); |
---|
| 720 | extern rtx gen_label_rtx PROTO((void)); |
---|
| 721 | extern rtx gen_inline_header_rtx PROTO((rtx, rtx, int, int, int, int, |
---|
| 722 | int, int, rtx, rtx, int, int, |
---|
| 723 | rtvec, rtx)); |
---|
| 724 | extern rtx gen_lowpart_common PROTO((enum machine_mode, rtx)); |
---|
| 725 | extern rtx gen_lowpart PROTO((enum machine_mode, rtx)); |
---|
| 726 | extern rtx gen_lowpart_if_possible PROTO((enum machine_mode, rtx)); |
---|
| 727 | extern rtx gen_highpart PROTO((enum machine_mode, rtx)); |
---|
| 728 | extern rtx gen_realpart PROTO((enum machine_mode, rtx)); |
---|
| 729 | extern rtx gen_imagpart PROTO((enum machine_mode, rtx)); |
---|
| 730 | extern rtx operand_subword PROTO((rtx, int, int, enum machine_mode)); |
---|
| 731 | extern rtx operand_subword_force PROTO((rtx, int, enum machine_mode)); |
---|
| 732 | extern int subreg_lowpart_p PROTO((rtx)); |
---|
| 733 | extern rtx make_safe_from PROTO((rtx, rtx)); |
---|
| 734 | extern rtx convert_memory_address PROTO((enum machine_mode, rtx)); |
---|
| 735 | extern rtx memory_address PROTO((enum machine_mode, rtx)); |
---|
| 736 | extern rtx get_insns PROTO((void)); |
---|
| 737 | extern rtx get_last_insn PROTO((void)); |
---|
| 738 | extern rtx get_last_insn_anywhere PROTO((void)); |
---|
| 739 | extern void start_sequence PROTO((void)); |
---|
| 740 | extern void push_to_sequence PROTO((rtx)); |
---|
| 741 | extern void end_sequence PROTO((void)); |
---|
| 742 | extern rtx gen_sequence PROTO((void)); |
---|
| 743 | extern rtx immed_double_const PROTO((HOST_WIDE_INT, HOST_WIDE_INT, enum machine_mode)); |
---|
| 744 | extern rtx force_const_mem PROTO((enum machine_mode, rtx)); |
---|
| 745 | extern rtx force_reg PROTO((enum machine_mode, rtx)); |
---|
| 746 | extern rtx get_pool_constant PROTO((rtx)); |
---|
| 747 | extern enum machine_mode get_pool_mode PROTO((rtx)); |
---|
| 748 | extern int get_pool_offset PROTO((rtx)); |
---|
| 749 | extern rtx simplify_subtraction PROTO((rtx)); |
---|
| 750 | extern rtx assign_stack_local PROTO((enum machine_mode, int, int)); |
---|
| 751 | extern rtx assign_stack_temp PROTO((enum machine_mode, int, int)); |
---|
| 752 | extern rtx protect_from_queue PROTO((rtx, int)); |
---|
| 753 | extern void emit_queue PROTO((void)); |
---|
| 754 | extern rtx emit_move_insn PROTO((rtx, rtx)); |
---|
| 755 | extern rtx emit_insn_before PROTO((rtx, rtx)); |
---|
| 756 | extern rtx emit_jump_insn_before PROTO((rtx, rtx)); |
---|
| 757 | extern rtx emit_call_insn_before PROTO((rtx, rtx)); |
---|
| 758 | extern rtx emit_barrier_before PROTO((rtx)); |
---|
| 759 | extern rtx emit_note_before PROTO((int, rtx)); |
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| 760 | extern rtx emit_insn_after PROTO((rtx, rtx)); |
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| 761 | extern rtx emit_jump_insn_after PROTO((rtx, rtx)); |
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| 762 | extern rtx emit_barrier_after PROTO((rtx)); |
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| 763 | extern rtx emit_label_after PROTO((rtx, rtx)); |
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| 764 | extern rtx emit_note_after PROTO((int, rtx)); |
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| 765 | extern rtx emit_line_note_after PROTO((char *, int, rtx)); |
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| 766 | extern rtx emit_insn PROTO((rtx)); |
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| 767 | extern rtx emit_insns PROTO((rtx)); |
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| 768 | extern rtx emit_insns_before PROTO((rtx, rtx)); |
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| 769 | extern rtx emit_insns_after PROTO((rtx, rtx)); |
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| 770 | extern rtx emit_jump_insn PROTO((rtx)); |
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| 771 | extern rtx emit_call_insn PROTO((rtx)); |
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| 772 | extern rtx emit_label PROTO((rtx)); |
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| 773 | extern rtx emit_barrier PROTO((void)); |
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| 774 | extern rtx emit_line_note PROTO((char *, int)); |
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| 775 | extern rtx emit_note PROTO((char *, int)); |
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| 776 | extern rtx emit_line_note_force PROTO((char *, int)); |
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| 777 | extern rtx make_insn_raw PROTO((rtx)); |
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| 778 | extern rtx previous_insn PROTO((rtx)); |
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| 779 | extern rtx next_insn PROTO((rtx)); |
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| 780 | extern rtx prev_nonnote_insn PROTO((rtx)); |
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| 781 | extern rtx next_nonnote_insn PROTO((rtx)); |
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| 782 | extern rtx prev_real_insn PROTO((rtx)); |
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| 783 | extern rtx next_real_insn PROTO((rtx)); |
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| 784 | extern rtx prev_active_insn PROTO((rtx)); |
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| 785 | extern rtx next_active_insn PROTO((rtx)); |
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| 786 | extern rtx prev_label PROTO((rtx)); |
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| 787 | extern rtx next_label PROTO((rtx)); |
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| 788 | extern rtx next_cc0_user PROTO((rtx)); |
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| 789 | extern rtx prev_cc0_setter PROTO((rtx)); |
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| 790 | extern rtx reg_set_last PROTO((rtx, rtx)); |
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| 791 | extern rtx next_nondeleted_insn PROTO((rtx)); |
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| 792 | extern enum rtx_code reverse_condition PROTO((enum rtx_code)); |
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| 793 | extern enum rtx_code swap_condition PROTO((enum rtx_code)); |
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| 794 | extern enum rtx_code unsigned_condition PROTO((enum rtx_code)); |
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| 795 | extern enum rtx_code signed_condition PROTO((enum rtx_code)); |
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| 796 | extern rtx find_equiv_reg PROTO((rtx, rtx, enum reg_class, int, short *, int, enum machine_mode)); |
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| 797 | extern rtx squeeze_notes PROTO((rtx, rtx)); |
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| 798 | extern rtx delete_insn PROTO((rtx)); |
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| 799 | extern void delete_jump PROTO((rtx)); |
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| 800 | extern rtx get_label_before PROTO((rtx)); |
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| 801 | extern rtx get_label_after PROTO((rtx)); |
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| 802 | extern rtx follow_jumps PROTO((rtx)); |
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| 803 | extern rtx adj_offsettable_operand PROTO((rtx, int)); |
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| 804 | extern rtx try_split PROTO((rtx, rtx, int)); |
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| 805 | extern rtx split_insns PROTO((rtx, rtx)); |
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| 806 | extern rtx simplify_unary_operation PROTO((enum rtx_code, enum machine_mode, rtx, enum machine_mode)); |
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| 807 | extern rtx simplify_binary_operation PROTO((enum rtx_code, enum machine_mode, rtx, rtx)); |
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| 808 | extern rtx simplify_ternary_operation PROTO((enum rtx_code, enum machine_mode, enum machine_mode, rtx, rtx, rtx)); |
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| 809 | extern rtx simplify_relational_operation PROTO((enum rtx_code, enum machine_mode, rtx, rtx)); |
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| 810 | extern rtx nonlocal_label_rtx_list PROTO((void)); |
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| 811 | extern rtx gen_move_insn PROTO((rtx, rtx)); |
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| 812 | extern rtx gen_jump PROTO((rtx)); |
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| 813 | extern rtx gen_beq PROTO((rtx)); |
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| 814 | extern rtx gen_bge PROTO((rtx)); |
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| 815 | extern rtx gen_ble PROTO((rtx)); |
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| 816 | extern rtx eliminate_constant_term PROTO((rtx, rtx *)); |
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| 817 | extern rtx expand_complex_abs PROTO((enum machine_mode, rtx, rtx, int)); |
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| 818 | extern enum machine_mode choose_hard_reg_mode PROTO((int, int)); |
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| 819 | |
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| 820 | /* Maximum number of parallel sets and clobbers in any insn in this fn. |
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| 821 | Always at least 3, since the combiner could put that many togetherm |
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| 822 | and we want this to remain correct for all the remaining passes. */ |
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| 823 | |
---|
| 824 | extern int max_parallel; |
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| 825 | |
---|
| 826 | extern int asm_noperands PROTO((rtx)); |
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| 827 | extern char *decode_asm_operands PROTO((rtx, rtx *, rtx **, char **, enum machine_mode *)); |
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| 828 | |
---|
| 829 | extern enum reg_class reg_preferred_class PROTO((int)); |
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| 830 | extern enum reg_class reg_alternate_class PROTO((int)); |
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| 831 | |
---|
| 832 | extern rtx get_first_nonparm_insn PROTO((void)); |
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| 833 | |
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| 834 | /* Standard pieces of rtx, to be substituted directly into things. */ |
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| 835 | extern rtx pc_rtx; |
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| 836 | extern rtx cc0_rtx; |
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| 837 | extern rtx const0_rtx; |
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| 838 | extern rtx const1_rtx; |
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| 839 | extern rtx const2_rtx; |
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| 840 | extern rtx constm1_rtx; |
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| 841 | extern rtx const_true_rtx; |
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| 842 | |
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| 843 | extern rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE]; |
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| 844 | |
---|
| 845 | /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the |
---|
| 846 | same as VOIDmode. */ |
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| 847 | |
---|
| 848 | #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)]) |
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| 849 | |
---|
| 850 | /* Likewise, for the constants 1 and 2. */ |
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| 851 | |
---|
| 852 | #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)]) |
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| 853 | #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)]) |
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| 854 | |
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| 855 | /* All references to certain hard regs, except those created |
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| 856 | by allocating pseudo regs into them (when that's possible), |
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| 857 | go through these unique rtx objects. */ |
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| 858 | extern rtx stack_pointer_rtx; |
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| 859 | extern rtx frame_pointer_rtx; |
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| 860 | extern rtx hard_frame_pointer_rtx; |
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| 861 | extern rtx arg_pointer_rtx; |
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| 862 | extern rtx pic_offset_table_rtx; |
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| 863 | extern rtx struct_value_rtx; |
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| 864 | extern rtx struct_value_incoming_rtx; |
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| 865 | extern rtx static_chain_rtx; |
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| 866 | extern rtx static_chain_incoming_rtx; |
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| 867 | |
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| 868 | /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg |
---|
| 869 | is used to represent the frame pointer. This is because the |
---|
| 870 | hard frame pointer and the automatic variables are separated by an amount |
---|
| 871 | that cannot be determined until after register allocation. We can assume |
---|
| 872 | that in this case ELIMINABLE_REGS will be defined, one action of which |
---|
| 873 | will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */ |
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| 874 | #ifndef HARD_FRAME_POINTER_REGNUM |
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| 875 | #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM |
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| 876 | #endif |
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| 877 | |
---|
| 878 | /* Virtual registers are used during RTL generation to refer to locations into |
---|
| 879 | the stack frame when the actual location isn't known until RTL generation |
---|
| 880 | is complete. The routine instantiate_virtual_regs replaces these with |
---|
| 881 | the proper value, which is normally {frame,arg,stack}_pointer_rtx plus |
---|
| 882 | a constant. */ |
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| 883 | |
---|
| 884 | #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER) |
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| 885 | |
---|
| 886 | /* This points to the first word of the incoming arguments passed on the stack, |
---|
| 887 | either by the caller or by the callee when pretending it was passed by the |
---|
| 888 | caller. */ |
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| 889 | |
---|
| 890 | extern rtx virtual_incoming_args_rtx; |
---|
| 891 | |
---|
| 892 | #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER) |
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| 893 | |
---|
| 894 | /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first |
---|
| 895 | variable on the stack. Otherwise, it points to the first variable on |
---|
| 896 | the stack. */ |
---|
| 897 | |
---|
| 898 | extern rtx virtual_stack_vars_rtx; |
---|
| 899 | |
---|
| 900 | #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1) |
---|
| 901 | |
---|
| 902 | /* This points to the location of dynamically-allocated memory on the stack |
---|
| 903 | immediately after the stack pointer has been adjusted by the amount |
---|
| 904 | desired. */ |
---|
| 905 | |
---|
| 906 | extern rtx virtual_stack_dynamic_rtx; |
---|
| 907 | |
---|
| 908 | #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2) |
---|
| 909 | |
---|
| 910 | /* This points to the location in the stack at which outgoing arguments should |
---|
| 911 | be written when the stack is pre-pushed (arguments pushed using push |
---|
| 912 | insns always use sp). */ |
---|
| 913 | |
---|
| 914 | extern rtx virtual_outgoing_args_rtx; |
---|
| 915 | |
---|
| 916 | #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3) |
---|
| 917 | |
---|
| 918 | #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 3) |
---|
| 919 | |
---|
| 920 | extern rtx find_next_ref PROTO((rtx, rtx)); |
---|
| 921 | extern rtx *find_single_use PROTO((rtx, rtx, rtx *)); |
---|
| 922 | |
---|
| 923 | /* It is hard to write the prototype for expand_expr, since it needs |
---|
| 924 | expr.h to be included for the enumeration. */ |
---|
| 925 | |
---|
| 926 | extern rtx expand_expr (); |
---|
| 927 | |
---|
| 928 | extern rtx output_constant_def PROTO((union tree_node *)); |
---|
| 929 | extern rtx immed_real_const PROTO((union tree_node *)); |
---|
| 930 | extern union tree_node *make_tree PROTO((union tree_node *, rtx)); |
---|
| 931 | |
---|
| 932 | /* Abort routines */ |
---|
| 933 | extern void fatal_insn_not_found PROTO((rtx)); |
---|
| 934 | extern void fatal_insn PROTO((char *, rtx)); |
---|
| 935 | |
---|
| 936 | /* Define a default value for STORE_FLAG_VALUE. */ |
---|
| 937 | |
---|
| 938 | #ifndef STORE_FLAG_VALUE |
---|
| 939 | #define STORE_FLAG_VALUE 1 |
---|
| 940 | #endif |
---|
| 941 | |
---|
| 942 | /* Nonzero after end of reload pass. |
---|
| 943 | Set to 1 or 0 by toplev.c. */ |
---|
| 944 | |
---|
| 945 | extern int reload_completed; |
---|
| 946 | |
---|
| 947 | /* Set to 1 while reload_as_needed is operating. |
---|
| 948 | Required by some machines to handle any generated moves differently. */ |
---|
| 949 | |
---|
| 950 | extern int reload_in_progress; |
---|
| 951 | |
---|
| 952 | /* If this is nonzero, we do not bother generating VOLATILE |
---|
| 953 | around volatile memory references, and we are willing to |
---|
| 954 | output indirect addresses. If cse is to follow, we reject |
---|
| 955 | indirect addresses so a useful potential cse is generated; |
---|
| 956 | if it is used only once, instruction combination will produce |
---|
| 957 | the same indirect address eventually. */ |
---|
| 958 | extern int cse_not_expected; |
---|
| 959 | |
---|
| 960 | /* Indexed by pseudo register number, gives the rtx for that pseudo. |
---|
| 961 | Allocated in parallel with regno_pointer_flag. */ |
---|
| 962 | extern rtx *regno_reg_rtx; |
---|
| 963 | |
---|
| 964 | /* Translates rtx code to tree code, for those codes needed by |
---|
| 965 | REAL_ARITHMETIC. The function returns an int because the caller may not |
---|
| 966 | know what `enum tree_code' means. */ |
---|
| 967 | |
---|
| 968 | extern int rtx_to_tree_code PROTO((enum rtx_code)); |
---|