output.h

GUN开源阻止下的编译器GCC

/* 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, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, 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));

#ifdef RTX_CODE
/* 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));
#endif

/* Functions in varasm.c.  */

/* Tell assembler to switch to text section.  */
extern void text_section		PROTO((void));

/* Tell assembler to switch to data section.  */
extern void data_section		PROTO((void));

/* Tell assembler to switch to read-only data section.  This is normally
   the text section.  */
extern void readonly_data_section	PROTO((void));

/* Determine if we're in the text section. */
extern int in_text_section		PROTO((void));

#ifdef TREE_CODE
/* Tell assembler to change to section NAME for DECL.
   If DECL is NULL, just switch to section NAME.
   If NAME is NULL, get the name from DECL.  */
extern void named_section		PROTO((tree, char *));

/* Tell assembler to switch to the section for function DECL.  */
extern void function_section		PROTO((tree));

/* Create the rtl to represent a function, for a function definition.
   DECL is a FUNCTION_DECL node which describes which function.
   The rtl is stored into DECL.  */
extern void make_function_rtl		PROTO((tree));

/* Decode an `asm' spec for a declaration as a register name.
   Return the register number, or -1 if nothing specified,
   or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized,
   or -3 if ASMSPEC is `cc' and is not recognized,
   or -4 if ASMSPEC is `memory' and is not recognized.
   Accept an exact spelling or a decimal number.
   Prefixes such as % are optional.  */
extern int decode_reg_name		PROTO((char *));

/* Create the DECL_RTL for a declaration for a static or external variable
   or static or external function.
   ASMSPEC, if not 0, is the string which the user specified
   as the assembler symbol name.
   TOP_LEVEL is nonzero if this is a file-scope variable.

   This is never called for PARM_DECL nodes.  */
extern void make_decl_rtl		PROTO((tree, char *, int));

/* Make the rtl for variable VAR be volatile.
   Use this only for static variables.  */
extern void make_var_volatile		PROTO((tree));

/* Output alignment directive to align for constant expression EXP.  */
extern void assemble_constant_align	PROTO((tree));

/* Output a string of literal assembler code
   for an `asm' keyword used between functions.  */
extern void assemble_asm		PROTO((tree));

/* Record an element in the table of global destructors.
   How this is done depends on what sort of assembler and linker
   are in use.

   NAME should be the name of a global function to be called
   at exit time.  This name is output using assemble_name.  */
extern void assemble_destructor		PROTO((char *));

/* Likewise for global constructors.  */
extern void assemble_constructor	PROTO((char *));

/* Likewise for entries we want to record for garbage collection.
   Garbage collection is still under development.  */
extern void assemble_gc_entry		PROTO((char *));

/* Output assembler code for the constant pool of a function and associated
   with defining the name of the function.  DECL describes the function.
   NAME is the function's name.  For the constant pool, we use the current
   constant pool data.  */
extern void assemble_start_function	PROTO((tree, char *));

/* Output assembler code associated with defining the size of the
   function.  DECL describes the function.  NAME is the function's name.  */
extern void assemble_end_function	PROTO((tree, char *));

/* Assemble code to leave SIZE bytes of zeros.  */
extern void assemble_zeros		PROTO((int));

/* Assemble an alignment pseudo op for an ALIGN-bit boundary.  */
extern void assemble_align		PROTO((int));

/* Assemble a string constant with the specified C string as contents.  */
extern void assemble_string		PROTO((char *, int));
/* Assemble everything that is needed for a variable or function declaration.
   Not used for automatic variables, and not used for function definitions.
   Should not be called for variables of incomplete structure type.

   TOP_LEVEL is nonzero if this variable has file scope.
   AT_END is nonzero if this is the special handling, at end of compilation,