gcc/output.h

   1 /* Declarations for insn-output.c.  These functions are defined in recog.c,
   2    final.c, and varasm.c.
   3    Copyright (C) 1987, 1991 Free Software Foundation, Inc.
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU CC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  20
  21 #ifndef STDIO_PROTO
  22 #ifdef BUFSIZ
  23 #define STDIO_PROTO(ARGS) PROTO(ARGS)
  24 #else
  25 #define STDIO_PROTO(ARGS) ()
  26 #endif
  27 #endif
  28
  29 /* Output a string of assembler code, substituting insn operands.
  30    Defined in final.c.  */
  31 extern void output_asm_insn PROTO((char *, rtx *));
  32
  33 /* Output a string of assembler code, substituting numbers, strings
  34    and fixed syntactic prefixes.  */
  35 extern void asm_fprintf ();
  36
  37 /* Print an integer constant expression in assembler syntax.
  38    Addition and subtraction are the only arithmetic
  39    that may appear in these expressions.  */
  40 extern void output_addr_const STDIO_PROTO((FILE *, rtx));
  41
  42 /* Output a name (as found inside a symbol_ref) in assembler syntax.  */
  43 extern void assemble_name STDIO_PROTO((FILE *, char *));
  44
  45 /* Replace a SUBREG with a REG or a MEM, based on the thing it is a
  46    subreg of.  */
  47 extern rtx alter_subreg PROTO((rtx));
  48
  49 /* When outputting assembler code, indicates which alternative
  50    of the constraints was actually satisfied.  */
  51 extern int which_alternative;
  52
  53 /* When outputting delayed branch sequences, this rtx holds the
  54    sequence being output.  It is null when no delayed branch
  55    sequence is being output, so it can be used as a test in the
  56    insn output code.
  57
  58    This variable is defined  in final.c.  */
  59 extern rtx final_sequence;
  60
  61 /* Number of bytes of args popped by function being compiled on its return.
  62    Zero if no bytes are to be popped.
  63    May affect compilation of return insn or of function epilogue.  */
  64
  65 extern int current_function_pops_args;
  66
  67 /* Nonzero if function being compiled needs to be given an address
  68    where the value should be stored.  */
  69
  70 extern int current_function_returns_struct;
  71
  72 /* Nonzero if function being compiled needs to
  73    return the address of where it has put a structure value.  */
  74
  75 extern int current_function_returns_pcc_struct;
  76
  77 /* Nonzero if function being compiled needs to be passed a static chain.  */
  78
  79 extern int current_function_needs_context;
  80
  81 /* Nonzero if function being compiled can call setjmp.  */
  82
  83 extern int current_function_calls_setjmp;
  84
  85 /* Nonzero if function being compiled can call longjmp.  */
  86
  87 extern int current_function_calls_longjmp;
  88
  89 /* Nonzero if function being compiled can call alloca,
  90    either as a subroutine or builtin.  */
  91
  92 extern int current_function_calls_alloca;
  93
  94 /* Nonzero if function being compiled receives nonlocal gotos
  95    from nested functions.  */
  96
  97 extern int current_function_has_nonlocal_label;
  98
  99 /* Nonzero if function being compiled contains nested functions.  */
 100
 101 extern int current_function_contains_functions;
 102
 103 /* Nonzero if the current function returns a pointer type */
 104
 105 extern int current_function_returns_pointer;
 106
 107 /* If function's args have a fixed size, this is that size, in bytes.
 108    Otherwise, it is -1.
 109    May affect compilation of return insn or of function epilogue.  */
 110
 111 extern int current_function_args_size;
 112
 113 /* # bytes the prologue should push and pretend that the caller pushed them.
 114    The prologue must do this, but only if parms can be passed in registers.  */
 115
 116 extern int current_function_pretend_args_size;
 117
 118 /* # of bytes of outgoing arguments required to be pushed by the prologue.
 119    If this is non-zero, it means that ACCUMULATE_OUTGOING_ARGS was defined
 120    and no stack adjusts will be done on function calls.  */
 121
 122 extern int current_function_outgoing_args_size;
 123
 124 /* Nonzero if current function uses varargs.h or equivalent.
 125    Zero for functions that use stdarg.h.  */
 126
 127 extern int current_function_varargs;
 128
 129 /* Quantities of various kinds of registers
 130    used for the current function's args.  */
 131
 132 extern CUMULATIVE_ARGS current_function_args_info;
 133
 134 /* Name of function now being compiled.  */
 135
 136 extern char *current_function_name;
 137
 138 /* If non-zero, an RTL expression for that location at which the current
 139    function returns its result.  Usually equal to
 140    DECL_RTL (DECL_RESULT (current_function_decl)).  */
 141
 142 extern rtx current_function_return_rtx;
 143
 144 /* If some insns can be deferred to the delay slots of the epilogue, the
 145    delay list for them is recorded here.  */
 146
 147 extern rtx current_function_epilogue_delay_list;
 148
 149 /* Nonzero means generate position-independent code.
 150    This is not fully implemented yet.  */
 151
 152 extern int flag_pic;
 153
 154 /* This is nonzero if the current function uses pic_offset_table_rtx.  */
 155 extern int current_function_uses_pic_offset_table;
 156
 157 /* This is nonzero if the current function uses the constant pool.  */
 158 extern int current_function_uses_const_pool;
 159
 160 /* The line number of the beginning of the current function.
 161    sdbout.c needs this so that it can output relative linenumbers.  */
 162
 163 #ifdef SDB_DEBUGGING_INFO /* Avoid undef sym in certain broken linkers.  */
 164 extern int sdb_begin_function_line;
 165 #endif
 166
 167 /* File in which assembler code is being written.  */
 168
 169 #ifdef BUFSIZ
 170 extern FILE *asm_out_file;
 171 #endif