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 /* Output a string of assembler code, substituting insn operands.
  22    Defined in final.c.  */
  23 extern void output_asm_insn ();
  24
  25 /* Output a string of assembler code, substituting numbers, strings
  26    and fixed syntactic prefixes.  */
  27 extern void asm_fprintf ();
  28
  29 /* Replace a SUBREG with a REG or a MEM, based on the thing it is a
  30    subreg of.  */
  31 extern rtx alter_subreg ();
  32
  33 /* When outputting assembler code, indicates which alternative
  34    of the constraints was actually satisfied.  */
  35 extern int which_alternative;
  36
  37 /* When outputting delayed branch sequences, this rtx holds the
  38    sequence being output.  It is null when no delayed branch
  39    sequence is being output, so it can be used as a test in the
  40    insn output code.
  41
  42    This variable is defined  in final.c.  */
  43 extern rtx final_sequence;
  44
  45 /* Number of bytes of args popped by function being compiled on its return.
  46    Zero if no bytes are to be popped.
  47    May affect compilation of return insn or of function epilogue.  */
  48
  49 extern int current_function_pops_args;
  50
  51 /* Nonzero if function being compiled needs to be given an address
  52    where the value should be stored.  */
  53
  54 extern int current_function_returns_struct;
  55
  56 /* Nonzero if function being compiled needs to
  57    return the address of where it has put a structure value.  */
  58
  59 extern int current_function_returns_pcc_struct;
  60
  61 /* Nonzero if function being compiled needs to be passed a static chain.  */
  62
  63 extern int current_function_needs_context;
  64
  65 /* Nonzero if function being compiled can call setjmp.  */
  66
  67 extern int current_function_calls_setjmp;
  68
  69 /* Nonzero if function being compiled can call longjmp.  */
  70
  71 extern int current_function_calls_longjmp;
  72
  73 /* Nonzero if function being compiled can call alloca,
  74    either as a subroutine or builtin.  */
  75
  76 extern int current_function_calls_alloca;
  77
  78 /* Nonzero if function being compiled receives nonlocal gotos
  79    from nested functions.  */
  80
  81 extern int current_function_has_nonlocal_label;
  82
  83 /* Nonzero if function being compiled contains nested functions.  */
  84
  85 extern int current_function_contains_functions;
  86
  87 /* Nonzero if the current function returns a pointer type */
  88
  89 extern int current_function_returns_pointer;
  90
  91 /* If function's args have a fixed size, this is that size, in bytes.
  92    Otherwise, it is -1.
  93    May affect compilation of return insn or of function epilogue.  */
  94
  95 extern int current_function_args_size;
  96
  97 /* # bytes the prologue should push and pretend that the caller pushed them.
  98    The prologue must do this, but only if parms can be passed in registers.  */
  99
 100 extern int current_function_pretend_args_size;
 101
 102 /* # of bytes of outgoing arguments required to be pushed by the prologue.
 103    If this is non-zero, it means that ACCUMULATE_OUTGOING_ARGS was defined
 104    and no stack adjusts will be done on function calls.  */
 105
 106 extern int current_function_outgoing_args_size;
 107
 108 /* Nonzero if current function uses varargs.h or equivalent.
 109    Zero for functions that use stdarg.h.  */
 110
 111 extern int current_function_varargs;
 112
 113 /* Quantities of various kinds of registers
 114    used for the current function's args.  */
 115
 116 extern CUMULATIVE_ARGS current_function_args_info;
 117
 118 /* Name of function now being compiled.  */
 119
 120 extern char *current_function_name;
 121
 122 /* If non-zero, an RTL expression for that location at which the current
 123    function returns its result.  Usually equal to
 124    DECL_RTL (DECL_RESULT (current_function_decl)).  */
 125
 126 extern rtx current_function_return_rtx;
 127
 128 /* If some insns can be deferred to the delay slots of the epilogue, the
 129    delay list for them is recorded here.  */
 130
 131 extern rtx current_function_epilogue_delay_list;
 132
 133 /* Nonzero means generate position-independent code.
 134    This is not fully implemented yet.  */
 135
 136 extern int flag_pic;
 137
 138 /* This is nonzero if the current function uses pic_offset_table_rtx.  */
 139 extern int current_function_uses_pic_offset_table;
 140
 141 /* The line number of the beginning of the current function.
 142    sdbout.c needs this so that it can output relative linenumbers.  */
 143
 144 #ifdef SDB_DEBUGGING_INFO /* Avoid undef sym in certain broken linkers.  */
 145 extern int sdb_begin_function_line;
 146 #endif
 147
 148 /* File in which assembler code is being written.  */
 149
 150 #ifdef BUFSIZ  /* The hope is that any kind of stdio.h must define BUFSIZ.  */
 151 extern FILE *asm_out_file;
 152 #endif