[8833] | 1 | /* Declarations for insn-output.c. These functions are defined in recog.c, |
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| 2 | final.c, and varasm.c. |
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| 3 | Copyright (C) 1987, 1991, 1994 Free Software Foundation, Inc. |
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| 4 | |
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| 5 | This file is part of GNU CC. |
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| 6 | |
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| 7 | GNU CC is free software; you can redistribute it and/or modify |
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| 8 | it under the terms of the GNU General Public License as published by |
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| 9 | the Free Software Foundation; either version 2, or (at your option) |
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| 10 | any later version. |
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| 11 | |
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| 12 | GNU CC is distributed in the hope that it will be useful, |
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| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 15 | GNU General Public License for more details. |
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| 16 | |
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| 17 | You should have received a copy of the GNU General Public License |
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| 18 | along with GNU CC; see the file COPYING. If not, write to |
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| 19 | the Free Software Foundation, 59 Temple Place - Suite 330, |
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| 20 | Boston, MA 02111-1307, USA. */ |
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| 21 | |
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| 22 | /* Initialize data in final at the beginning of a compilation. */ |
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| 23 | extern void init_final PROTO((char *)); |
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| 24 | |
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| 25 | /* Called at end of source file, |
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| 26 | to output the block-profiling table for this entire compilation. */ |
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| 27 | extern void end_final PROTO((char *)); |
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| 28 | |
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| 29 | /* Enable APP processing of subsequent output. |
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| 30 | Used before the output from an `asm' statement. */ |
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| 31 | extern void app_enable PROTO((void)); |
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| 32 | |
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| 33 | /* Disable APP processing of subsequent output. |
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| 34 | Called from varasm.c before most kinds of output. */ |
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| 35 | extern void app_disable PROTO((void)); |
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| 36 | |
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| 37 | /* Return the number of slots filled in the current |
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| 38 | delayed branch sequence (we don't count the insn needing the |
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| 39 | delay slot). Zero if not in a delayed branch sequence. */ |
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| 40 | extern int dbr_sequence_length PROTO((void)); |
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| 41 | |
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| 42 | /* Indicate that branch shortening hasn't yet been done. */ |
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| 43 | extern void init_insn_lengths PROTO((void)); |
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| 44 | |
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| 45 | #ifdef RTX_CODE |
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| 46 | /* Obtain the current length of an insn. If branch shortening has been done, |
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| 47 | get its actual length. Otherwise, get its maximum length. */ |
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| 48 | extern int get_attr_length PROTO((rtx)); |
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| 49 | |
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| 50 | /* Make a pass over all insns and compute their actual lengths by shortening |
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| 51 | any branches of variable length if possible. */ |
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| 52 | extern void shorten_branches PROTO((rtx)); |
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| 53 | |
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| 54 | /* Output assembler code for the start of a function, |
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| 55 | and initialize some of the variables in this file |
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| 56 | for the new function. The label for the function and associated |
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| 57 | assembler pseudo-ops have already been output in |
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| 58 | `assemble_start_function'. */ |
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| 59 | extern void final_start_function STDIO_PROTO((rtx, FILE *, int)); |
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| 60 | |
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| 61 | /* Output assembler code for the end of a function. |
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| 62 | For clarity, args are same as those of `final_start_function' |
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| 63 | even though not all of them are needed. */ |
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| 64 | extern void final_end_function STDIO_PROTO((rtx, FILE *, int)); |
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| 65 | |
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| 66 | /* Output assembler code for some insns: all or part of a function. */ |
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| 67 | extern void final STDIO_PROTO((rtx, FILE *, int, int)); |
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| 68 | |
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| 69 | /* The final scan for one insn, INSN. Args are same as in `final', except |
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| 70 | that INSN is the insn being scanned. Value returned is the next insn to |
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| 71 | be scanned. */ |
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| 72 | extern rtx final_scan_insn STDIO_PROTO((rtx, FILE *, int, int, int)); |
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| 73 | |
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| 74 | /* Replace a SUBREG with a REG or a MEM, based on the thing it is a |
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| 75 | subreg of. */ |
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| 76 | extern rtx alter_subreg PROTO((rtx)); |
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| 77 | |
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| 78 | /* Report inconsistency between the assembler template and the operands. |
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| 79 | In an `asm', it's the user's fault; otherwise, the compiler's fault. */ |
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| 80 | extern void output_operand_lossage PROTO((char *)); |
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| 81 | |
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| 82 | /* Output a string of assembler code, substituting insn operands. |
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| 83 | Defined in final.c. */ |
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| 84 | extern void output_asm_insn PROTO((char *, rtx *)); |
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| 85 | |
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| 86 | /* Output a LABEL_REF, or a bare CODE_LABEL, as an assembler symbol. */ |
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| 87 | extern void output_asm_label PROTO((rtx)); |
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| 88 | |
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| 89 | /* Print a memory reference operand for address X |
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| 90 | using machine-dependent assembler syntax. */ |
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| 91 | extern void output_address PROTO((rtx)); |
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| 92 | |
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| 93 | /* Print an integer constant expression in assembler syntax. |
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| 94 | Addition and subtraction are the only arithmetic |
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| 95 | that may appear in these expressions. */ |
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| 96 | extern void output_addr_const STDIO_PROTO((FILE *, rtx)); |
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| 97 | |
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| 98 | /* Output a string of assembler code, substituting numbers, strings |
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| 99 | and fixed syntactic prefixes. */ |
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| 100 | extern void asm_fprintf STDIO_PROTO(PVPROTO((FILE *file, |
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| 101 | char *p, ...))); |
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| 102 | |
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| 103 | /* Split up a CONST_DOUBLE or integer constant rtx into two rtx's for single |
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| 104 | words. */ |
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| 105 | extern void split_double PROTO((rtx, rtx *, rtx *)); |
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| 106 | |
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| 107 | /* Return nonzero if this function has no function calls. */ |
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| 108 | extern int leaf_function_p PROTO((void)); |
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| 109 | |
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| 110 | /* Return 1 if this function uses only the registers that can be |
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| 111 | safely renumbered. */ |
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| 112 | extern int only_leaf_regs_used PROTO((void)); |
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| 113 | |
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| 114 | /* Scan IN_RTX and its subexpressions, and renumber all regs into those |
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| 115 | available in leaf functions. */ |
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| 116 | extern void leaf_renumber_regs_insn PROTO((rtx)); |
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| 117 | #endif |
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| 118 | |
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| 119 | /* Functions in varasm.c. */ |
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| 120 | |
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| 121 | /* Tell assembler to switch to text section. */ |
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| 122 | extern void text_section PROTO((void)); |
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| 123 | |
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| 124 | /* Tell assembler to switch to data section. */ |
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| 125 | extern void data_section PROTO((void)); |
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| 126 | |
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| 127 | /* Tell assembler to switch to read-only data section. This is normally |
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| 128 | the text section. */ |
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| 129 | extern void readonly_data_section PROTO((void)); |
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| 130 | |
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| 131 | /* Determine if we're in the text section. */ |
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| 132 | extern int in_text_section PROTO((void)); |
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| 133 | |
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| 134 | #ifdef TREE_CODE |
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| 135 | /* Tell assembler to change to section NAME for DECL. |
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| 136 | If DECL is NULL, just switch to section NAME. |
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| 137 | If NAME is NULL, get the name from DECL. */ |
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| 138 | extern void named_section PROTO((tree, char *)); |
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| 139 | |
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| 140 | /* Tell assembler to switch to the section for function DECL. */ |
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| 141 | extern void function_section PROTO((tree)); |
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| 142 | |
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| 143 | /* Create the rtl to represent a function, for a function definition. |
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| 144 | DECL is a FUNCTION_DECL node which describes which function. |
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| 145 | The rtl is stored into DECL. */ |
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| 146 | extern void make_function_rtl PROTO((tree)); |
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| 147 | |
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| 148 | /* Decode an `asm' spec for a declaration as a register name. |
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| 149 | Return the register number, or -1 if nothing specified, |
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| 150 | or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized, |
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| 151 | or -3 if ASMSPEC is `cc' and is not recognized, |
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| 152 | or -4 if ASMSPEC is `memory' and is not recognized. |
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| 153 | Accept an exact spelling or a decimal number. |
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| 154 | Prefixes such as % are optional. */ |
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| 155 | extern int decode_reg_name PROTO((char *)); |
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| 156 | |
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| 157 | /* Create the DECL_RTL for a declaration for a static or external variable |
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| 158 | or static or external function. |
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| 159 | ASMSPEC, if not 0, is the string which the user specified |
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| 160 | as the assembler symbol name. |
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| 161 | TOP_LEVEL is nonzero if this is a file-scope variable. |
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| 162 | |
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| 163 | This is never called for PARM_DECL nodes. */ |
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| 164 | extern void make_decl_rtl PROTO((tree, char *, int)); |
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| 165 | |
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| 166 | /* Make the rtl for variable VAR be volatile. |
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| 167 | Use this only for static variables. */ |
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| 168 | extern void make_var_volatile PROTO((tree)); |
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| 169 | |
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| 170 | /* Output alignment directive to align for constant expression EXP. */ |
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| 171 | extern void assemble_constant_align PROTO((tree)); |
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| 172 | |
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| 173 | /* Output a string of literal assembler code |
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| 174 | for an `asm' keyword used between functions. */ |
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| 175 | extern void assemble_asm PROTO((tree)); |
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| 176 | |
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| 177 | /* Record an element in the table of global destructors. |
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| 178 | How this is done depends on what sort of assembler and linker |
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| 179 | are in use. |
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| 180 | |
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| 181 | NAME should be the name of a global function to be called |
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| 182 | at exit time. This name is output using assemble_name. */ |
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| 183 | extern void assemble_destructor PROTO((char *)); |
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| 184 | |
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| 185 | /* Likewise for global constructors. */ |
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| 186 | extern void assemble_constructor PROTO((char *)); |
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| 187 | |
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| 188 | /* Likewise for entries we want to record for garbage collection. |
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| 189 | Garbage collection is still under development. */ |
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| 190 | extern void assemble_gc_entry PROTO((char *)); |
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| 191 | |
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| 192 | /* Output assembler code for the constant pool of a function and associated |
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| 193 | with defining the name of the function. DECL describes the function. |
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| 194 | NAME is the function's name. For the constant pool, we use the current |
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| 195 | constant pool data. */ |
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| 196 | extern void assemble_start_function PROTO((tree, char *)); |
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| 197 | |
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| 198 | /* Output assembler code associated with defining the size of the |
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| 199 | function. DECL describes the function. NAME is the function's name. */ |
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| 200 | extern void assemble_end_function PROTO((tree, char *)); |
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| 201 | |
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| 202 | /* Assemble code to leave SIZE bytes of zeros. */ |
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| 203 | extern void assemble_zeros PROTO((int)); |
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| 204 | |
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| 205 | /* Assemble an alignment pseudo op for an ALIGN-bit boundary. */ |
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| 206 | extern void assemble_align PROTO((int)); |
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| 207 | |
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| 208 | /* Assemble a string constant with the specified C string as contents. */ |
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| 209 | extern void assemble_string PROTO((char *, int)); |
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| 210 | /* Assemble everything that is needed for a variable or function declaration. |
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| 211 | Not used for automatic variables, and not used for function definitions. |
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| 212 | Should not be called for variables of incomplete structure type. |
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| 213 | |
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| 214 | TOP_LEVEL is nonzero if this variable has file scope. |
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| 215 | AT_END is nonzero if this is the special handling, at end of compilation, |
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| 216 | to define things that have had only tentative definitions. |
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| 217 | DONT_OUTPUT_DATA if nonzero means don't actually output the |
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| 218 | initial value (that will be done by the caller). */ |
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| 219 | extern void assemble_variable PROTO((tree, int, int, int)); |
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| 220 | |
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| 221 | /* Output text storage for constructor CONSTR. */ |
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| 222 | extern void bc_output_constructor PROTO((tree, int)); |
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| 223 | |
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| 224 | /* Create storage for constructor CONSTR. */ |
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| 225 | extern void bc_output_data_constructor PROTO((tree)); |
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| 226 | |
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| 227 | /* Output something to declare an external symbol to the assembler. |
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| 228 | (Most assemblers don't need this, so we normally output nothing.) |
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| 229 | Do nothing if DECL is not external. */ |
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| 230 | extern void assemble_external PROTO((tree)); |
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| 231 | #endif |
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| 232 | |
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| 233 | #ifdef RTX_CODE |
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| 234 | /* Similar, for calling a library function FUN. */ |
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| 235 | extern void assemble_external_libcall PROTO((rtx)); |
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| 236 | #endif |
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| 237 | |
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| 238 | /* Declare the label NAME global. */ |
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| 239 | extern void assemble_global PROTO((char *)); |
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| 240 | |
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| 241 | /* Assemble a label named NAME. */ |
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| 242 | extern void assemble_label PROTO((char *)); |
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| 243 | |
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| 244 | /* Output to FILE a reference to the assembler name of a C-level name NAME. |
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| 245 | If NAME starts with a *, the rest of NAME is output verbatim. |
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| 246 | Otherwise NAME is transformed in an implementation-defined way |
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| 247 | (usually by the addition of an underscore). |
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| 248 | Many macros in the tm file are defined to call this function. */ |
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| 249 | extern void assemble_name STDIO_PROTO((FILE *, char *)); |
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| 250 | |
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| 251 | #ifdef RTX_CODE |
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| 252 | /* Assemble the integer constant X into an object of SIZE bytes. |
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| 253 | X must be either a CONST_INT or CONST_DOUBLE. |
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| 254 | |
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| 255 | Return 1 if we were able to output the constant, otherwise 0. If FORCE is |
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| 256 | non-zero, abort if we can't output the constant. */ |
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| 257 | extern int assemble_integer PROTO((rtx, int, int)); |
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| 258 | |
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| 259 | #ifdef EMUSHORT |
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| 260 | /* Assemble the floating-point constant D into an object of size MODE. */ |
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| 261 | extern void assemble_real PROTO((REAL_VALUE_TYPE, |
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| 262 | enum machine_mode)); |
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| 263 | #endif |
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| 264 | #endif |
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| 265 | |
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| 266 | /* At the end of a function, forget the memory-constants |
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| 267 | previously made for CONST_DOUBLEs. Mark them as not on real_constant_chain. |
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| 268 | Also clear out real_constant_chain and clear out all the chain-pointers. */ |
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| 269 | extern void clear_const_double_mem PROTO((void)); |
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| 270 | |
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| 271 | /* Start deferring output of subconstants. */ |
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| 272 | extern void defer_addressed_constants PROTO((void)); |
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| 273 | |
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| 274 | /* Stop deferring output of subconstants, |
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| 275 | and output now all those that have been deferred. */ |
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| 276 | extern void output_deferred_addressed_constants PROTO((void)); |
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| 277 | |
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| 278 | /* Initialize constant pool hashing for next function. */ |
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| 279 | extern void init_const_rtx_hash_table PROTO((void)); |
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| 280 | |
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| 281 | /* Return the size of the constant pool. */ |
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| 282 | extern int get_pool_size PROTO((void)); |
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| 283 | |
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| 284 | #ifdef TREE_CODE |
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| 285 | /* Write all the constants in the constant pool. */ |
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| 286 | extern void output_constant_pool PROTO((char *, tree)); |
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| 287 | |
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| 288 | /* Output assembler code for constant EXP to FILE, with no label. |
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| 289 | This includes the pseudo-op such as ".int" or ".byte", and a newline. |
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| 290 | Assumes output_addressed_constants has been done on EXP already. |
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| 291 | |
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| 292 | Generate exactly SIZE bytes of assembler data, padding at the end |
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| 293 | with zeros if necessary. SIZE must always be specified. */ |
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| 294 | extern void output_constant PROTO((tree, int)); |
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| 295 | #endif |
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| 296 | |
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| 297 | /* When outputting assembler code, indicates which alternative |
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| 298 | of the constraints was actually satisfied. */ |
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| 299 | extern int which_alternative; |
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| 300 | |
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| 301 | #ifdef RTX_CODE |
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| 302 | /* When outputting delayed branch sequences, this rtx holds the |
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| 303 | sequence being output. It is null when no delayed branch |
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| 304 | sequence is being output, so it can be used as a test in the |
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| 305 | insn output code. |
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| 306 | |
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| 307 | This variable is defined in final.c. */ |
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| 308 | extern rtx final_sequence; |
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| 309 | #endif |
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| 310 | |
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| 311 | /* Number of bytes of args popped by function being compiled on its return. |
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| 312 | Zero if no bytes are to be popped. |
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| 313 | May affect compilation of return insn or of function epilogue. */ |
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| 314 | |
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| 315 | extern int current_function_pops_args; |
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| 316 | |
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| 317 | /* Nonzero if function being compiled needs to be given an address |
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| 318 | where the value should be stored. */ |
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| 319 | |
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| 320 | extern int current_function_returns_struct; |
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| 321 | |
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| 322 | /* Nonzero if function being compiled needs to |
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| 323 | return the address of where it has put a structure value. */ |
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| 324 | |
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| 325 | extern int current_function_returns_pcc_struct; |
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| 326 | |
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| 327 | /* Nonzero if function being compiled needs to be passed a static chain. */ |
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| 328 | |
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| 329 | extern int current_function_needs_context; |
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| 330 | |
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| 331 | /* Nonzero if function being compiled can call setjmp. */ |
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| 332 | |
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| 333 | extern int current_function_calls_setjmp; |
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| 334 | |
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| 335 | /* Nonzero if function being compiled can call longjmp. */ |
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| 336 | |
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| 337 | extern int current_function_calls_longjmp; |
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| 338 | |
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| 339 | /* Nonzero if function being compiled can call alloca, |
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| 340 | either as a subroutine or builtin. */ |
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| 341 | |
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| 342 | extern int current_function_calls_alloca; |
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| 343 | |
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| 344 | /* Nonzero if function being compiled receives nonlocal gotos |
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| 345 | from nested functions. */ |
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| 346 | |
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| 347 | extern int current_function_has_nonlocal_label; |
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| 348 | |
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| 349 | /* Nonzero if function being compiled contains nested functions. */ |
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| 350 | |
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| 351 | extern int current_function_contains_functions; |
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| 352 | |
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| 353 | /* Nonzero if the current function returns a pointer type */ |
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| 354 | |
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| 355 | extern int current_function_returns_pointer; |
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| 356 | |
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| 357 | /* If function's args have a fixed size, this is that size, in bytes. |
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| 358 | Otherwise, it is -1. |
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| 359 | May affect compilation of return insn or of function epilogue. */ |
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| 360 | |
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| 361 | extern int current_function_args_size; |
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| 362 | |
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| 363 | /* # bytes the prologue should push and pretend that the caller pushed them. |
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| 364 | The prologue must do this, but only if parms can be passed in registers. */ |
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| 365 | |
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| 366 | extern int current_function_pretend_args_size; |
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| 367 | |
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| 368 | /* # of bytes of outgoing arguments required to be pushed by the prologue. |
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| 369 | If this is non-zero, it means that ACCUMULATE_OUTGOING_ARGS was defined |
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| 370 | and no stack adjusts will be done on function calls. */ |
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| 371 | |
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| 372 | extern int current_function_outgoing_args_size; |
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| 373 | |
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| 374 | /* Nonzero if current function uses varargs.h or equivalent. |
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| 375 | Zero for functions that use stdarg.h. */ |
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| 376 | |
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| 377 | extern int current_function_varargs; |
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| 378 | |
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| 379 | /* Nonzero if current function uses stdarg.h or equivalent. |
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| 380 | Zero for functions that use varargs.h. */ |
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| 381 | |
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| 382 | extern int current_function_stdarg; |
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| 383 | |
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| 384 | /* Quantities of various kinds of registers |
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| 385 | used for the current function's args. */ |
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| 386 | |
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| 387 | extern CUMULATIVE_ARGS current_function_args_info; |
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| 388 | |
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| 389 | /* Name of function now being compiled. */ |
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| 390 | |
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| 391 | extern char *current_function_name; |
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| 392 | |
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| 393 | #ifdef RTX_CODE |
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| 394 | /* If non-zero, an RTL expression for that location at which the current |
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| 395 | function returns its result. Usually equal to |
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| 396 | DECL_RTL (DECL_RESULT (current_function_decl)). */ |
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| 397 | |
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| 398 | extern rtx current_function_return_rtx; |
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| 399 | |
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| 400 | /* If some insns can be deferred to the delay slots of the epilogue, the |
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| 401 | delay list for them is recorded here. */ |
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| 402 | |
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| 403 | extern rtx current_function_epilogue_delay_list; |
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| 404 | #endif |
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| 405 | |
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| 406 | /* Nonzero means generate position-independent code. |
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| 407 | This is not fully implemented yet. */ |
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| 408 | |
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| 409 | extern int flag_pic; |
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| 410 | |
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| 411 | /* This is nonzero if the current function uses pic_offset_table_rtx. */ |
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| 412 | extern int current_function_uses_pic_offset_table; |
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| 413 | |
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| 414 | /* This is nonzero if the current function uses the constant pool. */ |
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| 415 | extern int current_function_uses_const_pool; |
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| 416 | |
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| 417 | /* The line number of the beginning of the current function. |
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| 418 | sdbout.c needs this so that it can output relative linenumbers. */ |
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| 419 | |
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| 420 | #ifdef SDB_DEBUGGING_INFO /* Avoid undef sym in certain broken linkers. */ |
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| 421 | extern int sdb_begin_function_line; |
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| 422 | #endif |
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| 423 | |
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| 424 | /* File in which assembler code is being written. */ |
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| 425 | |
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| 426 | #ifdef BUFSIZ |
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| 427 | extern FILE *asm_out_file; |
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| 428 | #endif |
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