/* Declarations for insn-output.c.  These functions are defined in recog.c,
   final.c, and varasm.c.
   Copyright (C) 1987, 1991, 1994 Free Software Foundation, Inc.

This file is part of GNU CC.

GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */

/* Initialize data in final at the beginning of a compilation.  */
extern void init_final		PROTO((char *));

/* Called at end of source file,
   to output the block-profiling table for this entire compilation.  */
extern void end_final		PROTO((char *));

/* Enable APP processing of subsequent output.
   Used before the output from an `asm' statement.  */
extern void app_enable		PROTO((void));

/* Disable APP processing of subsequent output.
   Called from varasm.c before most kinds of output.  */
extern void app_disable		PROTO((void));

/* Return the number of slots filled in the current
   delayed branch sequence (we don't count the insn needing the
   delay slot).   Zero if not in a delayed branch sequence.  */
extern int dbr_sequence_length	PROTO((void));

/* Indicate that branch shortening hasn't yet been done.  */
extern void init_insn_lengths	PROTO((void));

/* Obtain the current length of an insn.  If branch shortening has been done,
   get its actual length.  Otherwise, get its maximum length.  */
extern int get_attr_length	PROTO((rtx));

/* Make a pass over all insns and compute their actual lengths by shortening
   any branches of variable length if possible.  */
extern void shorten_branches	PROTO((rtx));

/* Output assembler code for the start of a function,
   and initialize some of the variables in this file
   for the new function.  The label for the function and associated
   assembler pseudo-ops have already been output in
   `assemble_start_function'.  */
extern void final_start_function  STDIO_PROTO((rtx, FILE *, int));

/* Output assembler code for the end of a function.
   For clarity, args are same as those of `final_start_function'
   even though not all of them are needed.  */
extern void final_end_function  STDIO_PROTO((rtx, FILE *, int));

/* Output assembler code for some insns: all or part of a function.  */
extern void final		STDIO_PROTO((rtx, FILE *, int, int));

/* The final scan for one insn, INSN.  Args are same as in `final', except
   that INSN is the insn being scanned.  Value returned is the next insn to
   be scanned.  */
extern rtx final_scan_insn	STDIO_PROTO((rtx, FILE *, int, int, int));

/* Replace a SUBREG with a REG or a MEM, based on the thing it is a
   subreg of.  */
extern rtx alter_subreg PROTO((rtx));

/* Report inconsistency between the assembler template and the operands.
   In an `asm', it's the user's fault; otherwise, the compiler's fault.  */
extern void output_operand_lossage  PROTO((char *));

/* Output a string of assembler code, substituting insn operands.
   Defined in final.c.  */
extern void output_asm_insn	PROTO((char *, rtx *));

/* Output a LABEL_REF, or a bare CODE_LABEL, as an assembler symbol.  */
extern void output_asm_label	PROTO((rtx));

/* Print a memory reference operand for address X
   using machine-dependent assembler syntax.  */
extern void output_address	PROTO((rtx));

/* Print an integer constant expression in assembler syntax.
   Addition and subtraction are the only arithmetic
   that may appear in these expressions.  */
extern void output_addr_const STDIO_PROTO((FILE *, rtx));

/* Output a string of assembler code, substituting numbers, strings
   and fixed syntactic prefixes.  */
extern void asm_fprintf		STDIO_PROTO(PVPROTO((FILE *file,
						     char *p, ...)));

/* Split up a CONST_DOUBLE or integer constant rtx into two rtx's for single
   words.  */
extern void split_double	PROTO((rtx, rtx *, rtx *));

/* Return nonzero if this function has no function calls.  */
extern int leaf_function_p	PROTO((void));

/* Return 1 if this function uses only the registers that can be
   safely renumbered.  */
extern int only_leaf_regs_used	PROTO((void));

/* Scan IN_RTX and its subexpressions, and renumber all regs into those
   available in leaf functions.  */
extern void leaf_renumber_regs_insn PROTO((rtx));

/* Output a name (as found inside a symbol_ref) in assembler syntax.  */
extern void assemble_name STDIO_PROTO((FILE *, char *));

/* When outputting assembler code, indicates which alternative
   of the constraints was actually satisfied.  */
extern int which_alternative;

/* When outputting delayed branch sequences, this rtx holds the
   sequence being output.  It is null when no delayed branch
   sequence is being output, so it can be used as a test in the
   insn output code.

   This variable is defined  in final.c.  */
extern rtx final_sequence;

/* Number of bytes of args popped by function being compiled on its return.
   Zero if no bytes are to be popped.
   May affect compilation of return insn or of function epilogue.  */

extern int current_function_pops_args;

/* Nonzero if function being compiled needs to be given an address
   where the value should be stored.  */

extern int current_function_returns_struct;

/* Nonzero if function being compiled needs to
   return the address of where it has put a structure value.  */

extern int current_function_returns_pcc_struct;

/* Nonzero if function being compiled needs to be passed a static chain.  */

extern int current_function_needs_context;

/* Nonzero if function being compiled can call setjmp.  */

extern int current_function_calls_setjmp;

/* Nonzero if function being compiled can call longjmp.  */

extern int current_function_calls_longjmp;

/* Nonzero if function being compiled can call alloca,
   either as a subroutine or builtin.  */

extern int current_function_calls_alloca;

/* Nonzero if function being compiled receives nonlocal gotos
   from nested functions.  */

extern int current_function_has_nonlocal_label;

/* Nonzero if function being compiled contains nested functions.  */

extern int current_function_contains_functions;

/* Nonzero if the current function returns a pointer type */

extern int current_function_returns_pointer;

/* If function's args have a fixed size, this is that size, in bytes.
   Otherwise, it is -1.
   May affect compilation of return insn or of function epilogue.  */

extern int current_function_args_size;

/* # bytes the prologue should push and pretend that the caller pushed them.
   The prologue must do this, but only if parms can be passed in registers.  */

extern int current_function_pretend_args_size;

/* # of bytes of outgoing arguments required to be pushed by the prologue.
   If this is non-zero, it means that ACCUMULATE_OUTGOING_ARGS was defined
   and no stack adjusts will be done on function calls.  */

extern int current_function_outgoing_args_size;

/* Nonzero if current function uses varargs.h or equivalent.
   Zero for functions that use stdarg.h.  */

extern int current_function_varargs;

/* Quantities of various kinds of registers
   used for the current function's args.  */

extern CUMULATIVE_ARGS current_function_args_info;

/* Name of function now being compiled.  */

extern char *current_function_name;

/* If non-zero, an RTL expression for that location at which the current
   function returns its result.  Usually equal to
   DECL_RTL (DECL_RESULT (current_function_decl)).  */

extern rtx current_function_return_rtx;

/* If some insns can be deferred to the delay slots of the epilogue, the
   delay list for them is recorded here.  */

extern rtx current_function_epilogue_delay_list;

/* Nonzero means generate position-independent code.
   This is not fully implemented yet.  */

extern int flag_pic;

/* This is nonzero if the current function uses pic_offset_table_rtx.  */
extern int current_function_uses_pic_offset_table;

/* This is nonzero if the current function uses the constant pool.  */
extern int current_function_uses_const_pool;

/* The line number of the beginning of the current function.
   sdbout.c needs this so that it can output relative linenumbers.  */

#ifdef SDB_DEBUGGING_INFO /* Avoid undef sym in certain broken linkers.  */
extern int sdb_begin_function_line;
#endif

/* File in which assembler code is being written.  */

#ifdef BUFSIZ
extern FILE *asm_out_file;
#endif
