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 /* Print an integer constant expression in assembler syntax.
  30    Addition and subtraction are the only arithmetic
  31    that may appear in these expressions.  */
  32 extern void output_addr_const ();
  33
  34 /* Output a name (as found inside a symbol_ref) in assembler syntax.  */
  35 extern void assemble_name ();
  36
  37 /* Replace a SUBREG with a REG or a MEM, based on the thing it is a
  38    subreg of.  */
  39 extern rtx alter_subreg ();
  40
  41 /* When outputting assembler code, indicates which alternative
  42    of the constraints was actually satisfied.  */
  43 extern int which_alternative;
  44
  45 /* When outputting delayed branch sequences, this rtx holds the
  46    sequence being output.  It is null when no delayed branch
  47    sequence is being output, so it can be used as a test in the
  48    insn output code.
  49
  50    This variable is defined  in final.c.  */
  51 extern rtx final_sequence;
  52
  53 /* Number of bytes of args popped by function being compiled on its return.
  54    Zero if no bytes are to be popped.
  55    May affect compilation of return insn or of function epilogue.  */
  56
  57 extern int current_function_pops_args;
  58
  59 /* Nonzero if function being compiled needs to be given an address
  60    where the value should be stored.  */
  61
  62 extern int current_function_returns_struct;
  63
  64 /* Nonzero if function being compiled needs to
  65    return the address of where it has put a structure value.  */
  66
  67 extern int current_function_returns_pcc_struct;
  68
  69 /* Nonzero if function being compiled needs to be passed a static chain.  */
  70
  71 extern int current_function_needs_context;
  72
  73 /* Nonzero if function being compiled can call setjmp.  */
  74
  75 extern int current_function_calls_setjmp;
  76
  77 /* Nonzero if function being compiled can call longjmp.  */
  78
  79 extern int current_function_calls_longjmp;
  80
  81 /* Nonzero if function being compiled can call alloca,
  82    either as a subroutine or builtin.  */
  83
  84 extern int current_function_calls_alloca;
  85
  86 /* Nonzero if function being compiled receives nonlocal gotos
  87    from nested functions.  */
  88
  89 extern int current_function_has_nonlocal_label;
  90
  91 /* Nonzero if function being compiled contains nested functions.  */
  92
  93 extern int current_function_contains_functions;
  94
  95 /* Nonzero if the current function returns a pointer type */
  96
  97 extern int current_function_returns_pointer;
  98
  99 /* If function's args have a fixed size, this is that size, in bytes.
 100    Otherwise, it is -1.
 101    May affect compilation of return insn or of function epilogue.  */
 102
 103 extern int current_function_args_size;
 104
 105 /* # bytes the prologue should push and pretend that the caller pushed them.
 106    The prologue must do this, but only if parms can be passed in registers.  */
 107
 108 extern int current_function_pretend_args_size;
 109
 110 /* # of bytes of outgoing arguments required to be pushed by the prologue.
 111    If this is non-zero, it means that ACCUMULATE_OUTGOING_ARGS was defined
 112    and no stack adjusts will be done on function calls.  */
 113
 114 extern int current_function_outgoing_args_size;
 115
 116 /* Nonzero if current function uses varargs.h or equivalent.
 117    Zero for functions that use stdarg.h.  */
 118
 119 extern int current_function_varargs;
 120
 121 /* Quantities of various kinds of registers
 122    used for the current function's args.  */
 123
 124 extern CUMULATIVE_ARGS current_function_args_info;
 125
 126 /* Name of function now being compiled.  */
 127
 128 extern char *current_function_name;
 129
 130 /* If non-zero, an RTL expression for that location at which the current
 131    function returns its result.  Usually equal to
 132    DECL_RTL (DECL_RESULT (current_function_decl)).  */
 133
 134 extern rtx current_function_return_rtx;
 135
 136 /* If some insns can be deferred to the delay slots of the epilogue, the
 137    delay list for them is recorded here.  */
 138
 139 extern rtx current_function_epilogue_delay_list;
 140
 141 /* Nonzero means generate position-independent code.
 142    This is not fully implemented yet.  */
 143
 144 extern int flag_pic;
 145
 146 /* This is nonzero if the current function uses pic_offset_table_rtx.  */
 147 extern int current_function_uses_pic_offset_table;
 148
 149 /* This is nonzero if the current function uses the constant pool.  */
 150 extern int current_function_uses_const_pool;
 151
 152 /* The line number of the beginning of the current function.
 153    sdbout.c needs this so that it can output relative linenumbers.  */
 154
 155 #ifdef SDB_DEBUGGING_INFO /* Avoid undef sym in certain broken linkers.  */
 156 extern int sdb_begin_function_line;
 157 #endif
 158
 159 /* File in which assembler code is being written.  */
 160
 161 #ifdef BUFSIZ  /* The hope is that any kind of stdio.h must define BUFSIZ.  */
 162 extern FILE *asm_out_file;
 163 #endif