547 lines
21 KiB
C
547 lines
21 KiB
C
/* Declarations for insn-output.c. These functions are defined in recog.c,
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final.c, and varasm.c.
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Copyright (C) 1987, 1991, 1994, 1997, 1998,
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1999, 2000, 2001, 2002 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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/* Compute branch alignments based on frequency information in the CFG. */
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extern void compute_alignments PARAMS ((void));
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/* Initialize data in final at the beginning of a compilation. */
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extern void init_final PARAMS ((const char *));
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/* Called at end of source file,
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to output the block-profiling table for this entire compilation. */
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extern void end_final PARAMS ((const char *));
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/* Enable APP processing of subsequent output.
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Used before the output from an `asm' statement. */
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extern void app_enable PARAMS ((void));
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/* Disable APP processing of subsequent output.
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Called from varasm.c before most kinds of output. */
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extern void app_disable PARAMS ((void));
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/* Return the number of slots filled in the current
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delayed branch sequence (we don't count the insn needing the
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delay slot). Zero if not in a delayed branch sequence. */
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extern int dbr_sequence_length PARAMS ((void));
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/* Indicate that branch shortening hasn't yet been done. */
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extern void init_insn_lengths PARAMS ((void));
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#ifdef RTX_CODE
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/* Obtain the current length of an insn. If branch shortening has been done,
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get its actual length. Otherwise, get its maximum length. */
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extern int get_attr_length PARAMS ((rtx));
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/* Make a pass over all insns and compute their actual lengths by shortening
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any branches of variable length if possible. */
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extern void shorten_branches PARAMS ((rtx));
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/* Output assembler code for the start of a function,
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and initialize some of the variables in this file
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for the new function. The label for the function and associated
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assembler pseudo-ops have already been output in
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`assemble_start_function'. */
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extern void final_start_function PARAMS ((rtx, FILE *, int));
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/* Output assembler code for the end of a function.
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For clarity, args are same as those of `final_start_function'
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even though not all of them are needed. */
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extern void final_end_function PARAMS ((void));
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/* Output assembler code for some insns: all or part of a function. */
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extern void final PARAMS ((rtx, FILE *, int, int));
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/* The final scan for one insn, INSN. Args are same as in `final', except
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that INSN is the insn being scanned. Value returned is the next insn to
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be scanned. */
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extern rtx final_scan_insn PARAMS ((rtx, FILE *, int, int, int));
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/* Replace a SUBREG with a REG or a MEM, based on the thing it is a
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subreg of. */
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extern rtx alter_subreg PARAMS ((rtx *));
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/* Report inconsistency between the assembler template and the operands.
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In an `asm', it's the user's fault; otherwise, the compiler's fault. */
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extern void output_operand_lossage PARAMS ((const char *, ...)) ATTRIBUTE_PRINTF_1;
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/* Output a string of assembler code, substituting insn operands.
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Defined in final.c. */
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extern void output_asm_insn PARAMS ((const char *, rtx *));
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/* Compute a worst-case reference address of a branch so that it
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can be safely used in the presence of aligned labels.
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Defined in final.c. */
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extern int insn_current_reference_address PARAMS ((rtx));
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/* Find the alignment associated with a CODE_LABEL.
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Defined in final.c. */
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extern int label_to_alignment PARAMS ((rtx));
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/* Output a LABEL_REF, or a bare CODE_LABEL, as an assembler symbol. */
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extern void output_asm_label PARAMS ((rtx));
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/* Print a memory reference operand for address X
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using machine-dependent assembler syntax. */
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extern void output_address PARAMS ((rtx));
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/* Print an integer constant expression in assembler syntax.
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Addition and subtraction are the only arithmetic
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that may appear in these expressions. */
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extern void output_addr_const PARAMS ((FILE *, rtx));
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/* Output a string of assembler code, substituting numbers, strings
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and fixed syntactic prefixes. */
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extern void asm_fprintf PARAMS ((FILE *file, const char *p, ...));
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/* Split up a CONST_DOUBLE or integer constant rtx into two rtx's for single
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words. */
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extern void split_double PARAMS ((rtx, rtx *, rtx *));
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/* Return nonzero if this function has no function calls. */
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extern int leaf_function_p PARAMS ((void));
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/* Return 1 if branch is an forward branch.
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Uses insn_shuid array, so it works only in the final pass. May be used by
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output templates to add branch prediction hints, for example. */
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extern int final_forward_branch_p PARAMS ((rtx));
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/* Return 1 if this function uses only the registers that can be
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safely renumbered. */
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extern int only_leaf_regs_used PARAMS ((void));
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/* Scan IN_RTX and its subexpressions, and renumber all regs into those
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available in leaf functions. */
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extern void leaf_renumber_regs_insn PARAMS ((rtx));
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/* Locate the proper template for the given insn-code. */
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extern const char *get_insn_template PARAMS ((int, rtx));
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/* Add function NAME to the weak symbols list. VALUE is a weak alias
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associated with NAME. */
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extern int add_weak PARAMS ((const char *, const char *));
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/* Functions in flow.c */
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extern void allocate_for_life_analysis PARAMS ((void));
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extern int regno_uninitialized PARAMS ((unsigned int));
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extern int regno_clobbered_at_setjmp PARAMS ((int));
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extern void find_basic_blocks PARAMS ((rtx, int, FILE *));
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extern bool cleanup_cfg PARAMS ((int));
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extern void check_function_return_warnings PARAMS ((void));
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#endif
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/* Functions in varasm.c. */
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/* Tell assembler to switch to text section. */
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extern void text_section PARAMS ((void));
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/* Tell assembler to switch to data section. */
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extern void data_section PARAMS ((void));
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/* Tell assembler to make sure its in the data section. */
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extern void force_data_section PARAMS ((void));
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/* Tell assembler to switch to read-only data section. This is normally
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the text section. */
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extern void readonly_data_section PARAMS ((void));
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/* Determine if we're in the text section. */
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extern int in_text_section PARAMS ((void));
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#ifdef CTORS_SECTION_ASM_OP
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extern void ctors_section PARAMS ((void));
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#endif
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#ifdef DTORS_SECTION_ASM_OP
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extern void dtors_section PARAMS ((void));
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#endif
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#ifdef BSS_SECTION_ASM_OP
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extern void bss_section PARAMS ((void));
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#endif
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#ifdef CONST_SECTION_ASM_OP
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extern void const_section PARAMS ((void));
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#endif
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#ifdef INIT_SECTION_ASM_OP
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extern void init_section PARAMS ((void));
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#endif
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#ifdef FINI_SECTION_ASM_OP
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extern void fini_section PARAMS ((void));
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#endif
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#ifdef EXPORTS_SECTION_ASM_OP
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extern void exports_section PARAMS ((void));
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#endif
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#ifdef TDESC_SECTION_ASM_OP
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extern void tdesc_section PARAMS ((void));
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#endif
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#ifdef DRECTVE_SECTION_ASM_OP
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extern void drectve_section PARAMS ((void));
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#endif
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#ifdef SDATA_SECTION_ASM_OP
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extern void sdata_section PARAMS ((void));
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#endif
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#ifdef RDATA_SECTION_ASM_OP
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extern void rdata_section PARAMS ((void));
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#endif
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#ifdef TREE_CODE
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/* Tell assembler to change to section NAME for DECL.
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If DECL is NULL, just switch to section NAME.
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If NAME is NULL, get the name from DECL.
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If RELOC is 1, the initializer for DECL contains relocs. */
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extern void named_section PARAMS ((tree, const char *, int));
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/* Tell assembler to switch to the section for function DECL. */
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extern void function_section PARAMS ((tree));
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/* Tell assembler to switch to the section for string merging. */
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extern void mergeable_string_section PARAMS ((tree, unsigned HOST_WIDE_INT,
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unsigned int));
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/* Tell assembler to switch to the section for constant merging. */
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extern void mergeable_constant_section PARAMS ((enum machine_mode,
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unsigned HOST_WIDE_INT,
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unsigned int));
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/* Declare DECL to be a weak symbol. */
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extern void declare_weak PARAMS ((tree));
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/* Merge weak status. */
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extern void merge_weak PARAMS ((tree, tree));
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#endif /* TREE_CODE */
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/* Emit any pending weak declarations. */
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extern void weak_finish PARAMS ((void));
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/* Decode an `asm' spec for a declaration as a register name.
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Return the register number, or -1 if nothing specified,
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or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized,
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or -3 if ASMSPEC is `cc' and is not recognized,
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or -4 if ASMSPEC is `memory' and is not recognized.
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Accept an exact spelling or a decimal number.
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Prefixes such as % are optional. */
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extern int decode_reg_name PARAMS ((const char *));
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#ifdef TREE_CODE
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/* Make the rtl for variable VAR be volatile.
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Use this only for static variables. */
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extern void make_var_volatile PARAMS ((tree));
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/* Output alignment directive to align for constant expression EXP. */
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extern void assemble_constant_align PARAMS ((tree));
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extern void assemble_alias PARAMS ((tree, tree));
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/* Output a string of literal assembler code
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for an `asm' keyword used between functions. */
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extern void assemble_asm PARAMS ((tree));
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/* Output assembler code for the constant pool of a function and associated
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with defining the name of the function. DECL describes the function.
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NAME is the function's name. For the constant pool, we use the current
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constant pool data. */
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extern void assemble_start_function PARAMS ((tree, const char *));
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/* Output assembler code associated with defining the size of the
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function. DECL describes the function. NAME is the function's name. */
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extern void assemble_end_function PARAMS ((tree, const char *));
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/* Assemble everything that is needed for a variable or function declaration.
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Not used for automatic variables, and not used for function definitions.
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Should not be called for variables of incomplete structure type.
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TOP_LEVEL is nonzero if this variable has file scope.
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AT_END is nonzero if this is the special handling, at end of compilation,
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to define things that have had only tentative definitions.
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DONT_OUTPUT_DATA if nonzero means don't actually output the
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initial value (that will be done by the caller). */
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extern void assemble_variable PARAMS ((tree, int, int, int));
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/* Output something to declare an external symbol to the assembler.
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(Most assemblers don't need this, so we normally output nothing.)
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Do nothing if DECL is not external. */
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extern void assemble_external PARAMS ((tree));
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#endif /* TREE_CODE */
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/* Assemble code to leave SIZE bytes of zeros. */
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extern void assemble_zeros PARAMS ((int));
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/* Assemble an alignment pseudo op for an ALIGN-bit boundary. */
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extern void assemble_align PARAMS ((int));
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extern void assemble_eh_align PARAMS ((int));
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/* Assemble a string constant with the specified C string as contents. */
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extern void assemble_string PARAMS ((const char *, int));
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#ifdef RTX_CODE
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/* Similar, for calling a library function FUN. */
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extern void assemble_external_libcall PARAMS ((rtx));
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#endif
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/* Declare the label NAME global. */
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extern void assemble_global PARAMS ((const char *));
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/* Assemble a label named NAME. */
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extern void assemble_label PARAMS ((const char *));
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extern void assemble_eh_label PARAMS ((const char *));
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/* Output to FILE a reference to the assembler name of a C-level name NAME.
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If NAME starts with a *, the rest of NAME is output verbatim.
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Otherwise NAME is transformed in an implementation-defined way
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(usually by the addition of an underscore).
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Many macros in the tm file are defined to call this function. */
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extern void assemble_name PARAMS ((FILE *, const char *));
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/* Return the assembler directive for creating a given kind of integer
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object. SIZE is the number of bytes in the object and ALIGNED_P
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indicates whether it is known to be aligned. Return NULL if the
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assembly dialect has no such directive.
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The returned string should be printed at the start of a new line and
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be followed immediately by the object's initial value. */
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extern const char *integer_asm_op PARAMS ((int, int));
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#ifdef RTX_CODE
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/* Use directive OP to assemble an integer object X. Print OP at the
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start of the line, followed immediately by the value of X. */
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extern void assemble_integer_with_op PARAMS ((const char *, rtx));
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/* The default implementation of the asm_out.integer target hook. */
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extern bool default_assemble_integer PARAMS ((rtx, unsigned int, int));
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/* Assemble the integer constant X into an object of SIZE bytes. ALIGN is
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the alignment of the integer in bits. Return 1 if we were able to output
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the constant, otherwise 0. If FORCE is non-zero, abort if we can't output
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the constant. */
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extern bool assemble_integer PARAMS ((rtx, unsigned, unsigned, int));
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/* An interface to assemble_integer for the common case in which a value is
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fully aligned and must be printed. VALUE is the value of the integer
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object and SIZE is the number of bytes it contains. */
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#define assemble_aligned_integer(SIZE, VALUE) \
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assemble_integer (VALUE, SIZE, (SIZE) * BITS_PER_UNIT, 1)
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#ifdef REAL_VALUE_TYPE
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/* Assemble the floating-point constant D into an object of size MODE. */
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extern void assemble_real PARAMS ((REAL_VALUE_TYPE,
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enum machine_mode,
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unsigned));
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#endif
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#endif
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/* At the end of a function, forget the memory-constants
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previously made for CONST_DOUBLEs. Mark them as not on real_constant_chain.
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Also clear out real_constant_chain and clear out all the chain-pointers. */
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extern void clear_const_double_mem PARAMS ((void));
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/* Start deferring output of subconstants. */
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extern void defer_addressed_constants PARAMS ((void));
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/* Stop deferring output of subconstants,
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and output now all those that have been deferred. */
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extern void output_deferred_addressed_constants PARAMS ((void));
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/* Return the size of the constant pool. */
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extern int get_pool_size PARAMS ((void));
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#ifdef HAVE_peephole
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extern rtx peephole PARAMS ((rtx));
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#endif
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#ifdef TREE_CODE
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/* Write all the constants in the constant pool. */
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extern void output_constant_pool PARAMS ((const char *, tree));
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/* Return nonzero if VALUE is a valid constant-valued expression
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for use in initializing a static variable; one that can be an
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element of a "constant" initializer.
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Return null_pointer_node if the value is absolute;
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if it is relocatable, return the variable that determines the relocation.
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We assume that VALUE has been folded as much as possible;
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therefore, we do not need to check for such things as
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arithmetic-combinations of integers. */
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extern tree initializer_constant_valid_p PARAMS ((tree, tree));
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/* Output assembler code for constant EXP to FILE, with no label.
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This includes the pseudo-op such as ".int" or ".byte", and a newline.
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Assumes output_addressed_constants has been done on EXP already.
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Generate exactly SIZE bytes of assembler data, padding at the end
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with zeros if necessary. SIZE must always be specified.
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ALIGN is the alignment in bits that may be assumed for the data. */
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extern void output_constant PARAMS ((tree, HOST_WIDE_INT,
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unsigned int));
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#endif
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#ifdef RTX_CODE
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/* When outputting delayed branch sequences, this rtx holds the
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sequence being output. It is null when no delayed branch
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sequence is being output, so it can be used as a test in the
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insn output code.
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This variable is defined in final.c. */
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extern rtx final_sequence;
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#endif
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/* The line number of the beginning of the current function. Various
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md code needs this so that it can output relative linenumbers. */
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#ifdef SDB_DEBUGGING_INFO /* Avoid undef sym in certain broken linkers. */
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extern int sdb_begin_function_line;
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#endif
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/* File in which assembler code is being written. */
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#ifdef BUFSIZ
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extern FILE *asm_out_file;
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#endif
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/* The first global object in the file. */
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extern const char *first_global_object_name;
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/* The first weak object in the file. */
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extern const char *weak_global_object_name;
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/* Nonzero if function being compiled doesn't contain any calls
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(ignoring the prologue and epilogue). This is set prior to
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local register allocation and is valid for the remaining
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compiler passes. */
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extern int current_function_is_leaf;
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/* Nonzero if function being compiled doesn't contain any instructions
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that can throw an exception. This is set prior to final. */
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extern int current_function_nothrow;
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/* Nonzero if function being compiled doesn't modify the stack pointer
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(ignoring the prologue and epilogue). This is only valid after
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life_analysis has run. */
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extern int current_function_sp_is_unchanging;
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/* Nonzero if the function being compiled is a leaf function which only
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uses leaf registers. This is valid after reload (specifically after
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sched2) and is useful only if the port defines LEAF_REGISTERS. */
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extern int current_function_uses_only_leaf_regs;
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/* Default file in which to dump debug output. */
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#ifdef BUFSIZ
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extern FILE *rtl_dump_file;
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#endif
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/* Nonnull if the insn currently being emitted was a COND_EXEC pattern. */
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extern struct rtx_def *current_insn_predicate;
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/* Last insn processed by final_scan_insn. */
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extern struct rtx_def *current_output_insn;
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/* Decide whether DECL needs to be in a writable section. RELOC is the same
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as for SELECT_SECTION. */
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#define DECL_READONLY_SECTION(DECL,RELOC) \
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(TREE_READONLY (DECL) \
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&& ! TREE_THIS_VOLATILE (DECL) \
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&& DECL_INITIAL (DECL) \
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&& (DECL_INITIAL (DECL) == error_mark_node \
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|| TREE_CONSTANT (DECL_INITIAL (DECL))) \
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&& ! (RELOC && (flag_pic || DECL_ONE_ONLY (DECL))))
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/* User label prefix in effect for this compilation. */
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extern const char *user_label_prefix;
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/* This macro gets just the user-specified name
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out of the string in a SYMBOL_REF. On most machines,
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we discard the * if any and that's all. */
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#ifndef STRIP_NAME_ENCODING
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#define STRIP_NAME_ENCODING(VAR,SYMBOL_NAME) \
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(VAR) = ((SYMBOL_NAME) + ((SYMBOL_NAME)[0] == '*'))
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#endif
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/* Default target function prologue and epilogue assembler output. */
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extern void default_function_pro_epilogue PARAMS ((FILE *, HOST_WIDE_INT));
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/* Tell assembler to switch to the section for the exception table. */
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extern void default_exception_section PARAMS ((void));
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/* Tell assembler to switch to the section for the EH frames. */
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extern void default_eh_frame_section PARAMS ((void));
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/* Default target hook that outputs nothing to a stream. */
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extern void no_asm_to_stream PARAMS ((FILE *));
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/* Flags controling properties of a section. */
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#define SECTION_ENTSIZE 0x000ff /* entity size in section */
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#define SECTION_CODE 0x00100 /* contains code */
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#define SECTION_WRITE 0x00200 /* data is writable */
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#define SECTION_DEBUG 0x00400 /* contains debug data */
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#define SECTION_LINKONCE 0x00800 /* is linkonce */
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#define SECTION_SMALL 0x01000 /* contains "small data" */
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#define SECTION_BSS 0x02000 /* contains zeros only */
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#define SECTION_FORGET 0x04000 /* forget that we've entered the section */
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#define SECTION_MERGE 0x08000 /* contains mergeable data */
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#define SECTION_STRINGS 0x10000 /* contains zero terminated strings without
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embedded zeros */
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#define SECTION_OVERRIDE 0x20000 /* allow override of default flags */
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#define SECTION_MACH_DEP 0x40000 /* subsequent bits reserved for target */
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extern unsigned int get_named_section_flags PARAMS ((const char *));
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extern bool set_named_section_flags PARAMS ((const char *, unsigned int));
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extern void named_section_flags PARAMS ((const char *, unsigned int));
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extern bool named_section_first_declaration PARAMS((const char *));
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union tree_node;
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extern unsigned int default_section_type_flags PARAMS ((union tree_node *,
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const char *, int));
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extern void default_no_named_section PARAMS ((const char *, unsigned int));
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extern void default_elf_asm_named_section PARAMS ((const char *, unsigned int));
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extern void default_coff_asm_named_section PARAMS ((const char *,
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unsigned int));
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extern void default_pe_asm_named_section PARAMS ((const char *, unsigned int));
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extern void default_stabs_asm_out_destructor PARAMS ((struct rtx_def *, int));
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extern void default_named_section_asm_out_destructor PARAMS ((struct rtx_def *,
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int));
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extern void default_dtor_section_asm_out_destructor PARAMS ((struct rtx_def *,
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int));
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extern void default_stabs_asm_out_constructor PARAMS ((struct rtx_def *, int));
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extern void default_named_section_asm_out_constructor PARAMS ((struct rtx_def *,
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int));
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extern void default_ctor_section_asm_out_constructor PARAMS ((struct rtx_def *,
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int));
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/* Emit data for vtable gc for GNU binutils. */
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extern void assemble_vtable_entry PARAMS ((struct rtx_def *, HOST_WIDE_INT));
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extern void assemble_vtable_inherit PARAMS ((struct rtx_def *,
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struct rtx_def *));
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