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/* Declarations for insn-output.c.  These functions are defined in recog.c,

   final.c, and varasm.c.

   Copyright (C) 1987, 1991, 1994, 1997, 1998,

   1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.

This file is part of GCC.

GCC 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.

GCC 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 GCC; see the file COPYING.  If not, write to the Free

Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301, USA.  */

#ifndef GCC_OUTPUT_H

#define GCC_OUTPUT_H

/* Compute branch alignments based on frequency information in the CFG.  */

extern void compute_alignments (void);

/* Initialize data in final at the beginning of a compilation.  */

extern void init_final (const char *);

/* Enable APP processing of subsequent output.

   Used before the output from an `asm' statement.  */

extern void app_enable (void);

/* Disable APP processing of subsequent output.

   Called from varasm.c before most kinds of output.  */

extern void app_disable (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 (void);

/* Indicate that branch shortening hasn't yet been done.  */

extern void init_insn_lengths (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 (rtx);

/* Obtain the current length of an insn.  If branch shortening has been done,

   get its actual length.  Otherwise, get its minimum length.  */

extern int get_attr_min_length (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 (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 (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 (void);

/* Output assembler code for some insns: all or part of a function.  */

extern void final (rtx, FILE *, 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 (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 (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 (const char *, ...) ATTRIBUTE_PRINTF_1;

/* Output a string of assembler code, substituting insn operands.

   Defined in final.c.  */

extern void output_asm_insn (const char *, rtx *);

/* Compute a worst-case reference address of a branch so that it

   can be safely used in the presence of aligned labels.

   Defined in final.c.  */

extern int insn_current_reference_address (rtx);

/* Find the alignment associated with a CODE_LABEL.

   Defined in final.c.  */

extern int label_to_alignment (rtx);

/* Output a LABEL_REF, or a bare CODE_LABEL, as an assembler symbol.  */

extern void output_asm_label (rtx);

/* Print a memory reference operand for address X

   using machine-dependent assembler syntax.  */

extern void output_address (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 (FILE *, rtx);

/* Output a string of assembler code, substituting numbers, strings

   and fixed syntactic prefixes.  */

#if GCC_VERSION >= 3004

#define ATTRIBUTE_ASM_FPRINTF(m, n) __attribute__ ((__format__ (__asm_fprintf__, m, n))) ATTRIBUTE_NONNULL(m)

/* This is a magic identifier which allows GCC to figure out the type

   of HOST_WIDE_INT for %wd specifier checks.  You must issue this

   typedef before using the __asm_fprintf__ format attribute.  */

typedef HOST_WIDE_INT __gcc_host_wide_int__;

#else

#define ATTRIBUTE_ASM_FPRINTF(m, n) ATTRIBUTE_NONNULL(m)

#endif

extern void asm_fprintf (FILE *file, const char *p, ...)

     ATTRIBUTE_ASM_FPRINTF(2, 3);

/* Split up a CONST_DOUBLE or integer constant rtx into two rtx's for single

   words.  */

extern void split_double (rtx, rtx *, rtx *);

/* Return nonzero if this function has no function calls.  */

extern int leaf_function_p (void);

/* Return 1 if branch is a forward branch.

   Uses insn_shuid array, so it works only in the final pass.  May be used by

   output templates to add branch prediction hints, for example.  */

extern int final_forward_branch_p (rtx);

/* Return 1 if this function uses only the registers that can be

   safely renumbered.  */

extern int only_leaf_regs_used (void);

/* Scan IN_RTX and its subexpressions, and renumber all regs into those

   available in leaf functions.  */

extern void leaf_renumber_regs_insn (rtx);

/* Locate the proper template for the given insn-code.  */

extern const char *get_insn_template (int, rtx);

/* Functions in flow.c */

extern int regno_clobbered_at_setjmp (int);

/* Functions in varasm.c.  */

/* Tell assembler to switch to text section.  */

extern void text_section (void);

/* Tell assembler to switch to unlikely-to-be-executed text section.  */

extern void unlikely_text_section (void);

/* Tell assembler to switch to data section.  */

extern void data_section (void);

/* Tell assembler to switch to read-only data section.  This is normally

   the text section.  */

extern void readonly_data_section (void);

/* Determine if we're in the text section.  */

extern int in_text_section (void);

/* Determine if we're in the unlikely-to-be-executed text section.  */

extern int in_unlikely_text_section (void);

#ifdef CTORS_SECTION_ASM_OP

extern void ctors_section (void);

#endif

#ifdef DTORS_SECTION_ASM_OP

extern void dtors_section (void);

#endif

#ifdef BSS_SECTION_ASM_OP

extern void bss_section (void);

#endif

#ifdef INIT_SECTION_ASM_OP

extern void init_section (void);

#endif

#ifdef FINI_SECTION_ASM_OP

extern void fini_section (void);

#endif

#ifdef EXPORTS_SECTION_ASM_OP

extern void exports_section (void);

#endif

#ifdef DRECTVE_SECTION_ASM_OP

extern void drectve_section (void);

#endif

#ifdef SDATA_SECTION_ASM_OP

extern void sdata_section (void);

#endif

/* 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.

   If RELOC is 1, the initializer for DECL contains relocs.  */

extern void named_section (tree, const char *, int);

/* Tell assembler to switch to the section for function DECL.  */

extern void function_section (tree);

/* Tell assembler to switch to the most recently used text section.  */

extern void current_function_section (tree);

/* Tell assembler to switch to the section for string merging.  */

extern void mergeable_string_section (tree, unsigned HOST_WIDE_INT,

                                      unsigned int);

/* Tell assembler to switch to the section for constant merging.  */

extern void mergeable_constant_section (enum machine_mode,

                                        unsigned HOST_WIDE_INT, unsigned int);

/* Declare DECL to be a weak symbol.  */

extern void declare_weak (tree);

/* Merge weak status.  */

extern void merge_weak (tree, tree);

/* Emit any pending weak declarations.  */

extern void weak_finish (void);

/* 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 (const char *);

/* Make the rtl for variable VAR be volatile.

   Use this only for static variables.  */

extern void make_var_volatile (tree);

extern void assemble_alias (tree, tree);

extern void default_assemble_visibility (tree, int);

/* Output a string of literal assembler code

   for an `asm' keyword used between functions.  */

extern void assemble_asm (tree);

/* 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 (tree, const 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 (tree, const char *);

/* 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,

   to define things that have had only tentative definitions.

   DONT_OUTPUT_DATA if nonzero means don't actually output the

   initial value (that will be done by the caller).  */

extern void assemble_variable (tree, int, int, int);

/* Output something to declare an external symbol to the assembler.

   (Most assemblers don't need this, so we normally output nothing.)

   Do nothing if DECL is not external.  */

extern void assemble_external (tree);

/* Assemble code to leave SIZE bytes of zeros.  */

extern void assemble_zeros (unsigned HOST_WIDE_INT);

/* Assemble an alignment pseudo op for an ALIGN-bit boundary.  */

extern void assemble_align (int);

/* Assemble a string constant with the specified C string as contents.  */

extern void assemble_string (const char *, int);

/* Similar, for calling a library function FUN.  */

extern void assemble_external_libcall (rtx);

/* Assemble a label named NAME.  */

extern void assemble_label (const char *);

/* Output to FILE (an assembly file) a reference to NAME.  If NAME

   starts with a *, the rest of NAME is output verbatim.  Otherwise

   NAME is transformed in a target-specific way (usually by the

   addition of an underscore).  */

extern void assemble_name_raw (FILE *, const char *);

/* Like assemble_name_raw, but should be used when NAME might refer to

   an entity that is also represented as a tree (like a function or

   variable).  If NAME does refer to such an entity, that entity will

   be marked as referenced.  */

extern void assemble_name (FILE *, const char *);

/* Return the assembler directive for creating a given kind of integer

   object.  SIZE is the number of bytes in the object and ALIGNED_P

   indicates whether it is known to be aligned.  Return NULL if the

   assembly dialect has no such directive.

   The returned string should be printed at the start of a new line and

   be followed immediately by the object's initial value.  */

extern const char *integer_asm_op (int, int);

/* Use directive OP to assemble an integer object X.  Print OP at the

   start of the line, followed immediately by the value of X.  */

extern void assemble_integer_with_op (const char *, rtx);

/* The default implementation of the asm_out.integer target hook.  */

extern bool default_assemble_integer (rtx, unsigned int, int);

/* Assemble the integer constant X into an object of SIZE bytes.  ALIGN is

   the alignment of the integer in bits.  Return 1 if we were able to output

   the constant, otherwise 0.  If FORCE is nonzero the constant must

   be outputable. */

extern bool assemble_integer (rtx, unsigned, unsigned, int);

/* An interface to assemble_integer for the common case in which a value is

   fully aligned and must be printed.  VALUE is the value of the integer

   object and SIZE is the number of bytes it contains.  */

#define assemble_aligned_integer(SIZE, VALUE) \

  assemble_integer (VALUE, SIZE, (SIZE) * BITS_PER_UNIT, 1)

#ifdef REAL_VALUE_TYPE_SIZE

/* Assemble the floating-point constant D into an object of size MODE.  */

extern void assemble_real (REAL_VALUE_TYPE, enum machine_mode, unsigned);

#endif

/* Return the size of the constant pool.  */

extern int get_pool_size (void);

#ifdef HAVE_peephole

extern rtx peephole (rtx);

#endif

/* Write all the constants in the constant pool.  */

extern void output_constant_pool (const char *, tree);

/* Return nonzero if VALUE is a valid constant-valued expression

   for use in initializing a static variable; one that can be an

   element of a "constant" initializer.

   Return null_pointer_node if the value is absolute;

   if it is relocatable, return the variable that determines the relocation.

   We assume that VALUE has been folded as much as possible;

   therefore, we do not need to check for such things as

   arithmetic-combinations of integers.  */

extern tree initializer_constant_valid_p (tree, tree);

/* Output assembler code for constant EXP to FILE, with no label.

   This includes the pseudo-op such as ".int" or ".byte", and a newline.

   Assumes output_addressed_constants has been done on EXP already.

   Generate exactly SIZE bytes of assembler data, padding at the end

   with zeros if necessary.  SIZE must always be specified.

   ALIGN is the alignment in bits that may be assumed for the data.  */

extern void output_constant (tree, unsigned HOST_WIDE_INT, unsigned int);

/* 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;

/* The line number of the beginning of the current function.  Various

   md code 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

/* The first global object in the file.  */

extern const char *first_global_object_name;

/* The first weak object in the file.  */

extern const char *weak_global_object_name;

/* Nonzero if function being compiled doesn't contain any calls

   (ignoring the prologue and epilogue).  This is set prior to

   local register allocation and is valid for the remaining

   compiler passes.  */

extern int current_function_is_leaf;

/* Nonzero if function being compiled doesn't modify the stack pointer

   (ignoring the prologue and epilogue).  This is only valid after

   life_analysis has run.  */

extern int current_function_sp_is_unchanging;

/* Nonzero if the function being compiled is a leaf function which only

   uses leaf registers.  This is valid after reload (specifically after

   sched2) and is useful only if the port defines LEAF_REGISTERS.  */

extern int current_function_uses_only_leaf_regs;

/* Default file in which to dump debug output.  */

#ifdef BUFSIZ

extern FILE *dump_file;

#endif

/* Nonnull if the insn currently being emitted was a COND_EXEC pattern.  */

extern rtx current_insn_predicate;

/* Last insn processed by final_scan_insn.  */

extern rtx current_output_insn;

/* Nonzero while outputting an `asm' with operands.

   This means that inconsistencies are the user's fault, so don't die.

   The precise value is the insn being output, to pass to error_for_asm.  */

extern rtx this_is_asm_operands;

/* Carry information from ASM_DECLARE_OBJECT_NAME

   to ASM_FINISH_DECLARE_OBJECT.  */

extern int size_directive_output;

extern tree last_assemble_variable_decl;

enum in_section { no_section, in_text, in_unlikely_executed_text, in_data,

                 in_named

#ifdef BSS_SECTION_ASM_OP

  , in_bss

#endif

#ifdef CTORS_SECTION_ASM_OP

  , in_ctors

#endif

#ifdef DTORS_SECTION_ASM_OP

  , in_dtors

#endif

#ifdef READONLY_DATA_SECTION_ASM_OP

  , in_readonly_data

#endif

#ifdef EXTRA_SECTIONS

  , EXTRA_SECTIONS

#endif

};

extern const char *last_text_section_name;

extern enum in_section last_text_section;

extern bool first_function_block_is_cold;

/* Decide whether DECL needs to be in a writable section.

   RELOC is the same as for SELECT_SECTION.  */

extern bool decl_readonly_section (tree, int);

extern bool decl_readonly_section_1 (tree, int, int);

/* This can be used to compute RELOC for the function above, when

   given a constant expression.  */

extern int compute_reloc_for_constant (tree);

/* User label prefix in effect for this compilation.  */

extern const char *user_label_prefix;

/* Default target function prologue and epilogue assembler output.  */

extern void default_function_pro_epilogue (FILE *, HOST_WIDE_INT);

/* Tell assembler to switch to the section for the exception table.  */

extern void default_exception_section (void);

/* Tell assembler to switch to the section for the EH frames.  */

extern void named_section_eh_frame_section (void);

extern void collect2_eh_frame_section (void);

extern void default_eh_frame_section (void);

/* Default target hook that outputs nothing to a stream.  */

extern void no_asm_to_stream (FILE *);

/* Flags controlling properties of a section.  */

#define SECTION_ENTSIZE  0x000ff        /* entity size in section */

#define SECTION_CODE     0x00100        /* contains code */

#define SECTION_WRITE    0x00200        /* data is writable */

#define SECTION_DEBUG    0x00400        /* contains debug data */

#define SECTION_LINKONCE 0x00800        /* is linkonce */

#define SECTION_SMALL    0x01000        /* contains "small data" */

#define SECTION_BSS      0x02000        /* contains zeros only */

#define SECTION_FORGET   0x04000        /* forget that we've entered the section */

#define SECTION_MERGE    0x08000        /* contains mergeable data */

#define SECTION_STRINGS  0x10000        /* contains zero terminated strings without

                                           embedded zeros */

#define SECTION_OVERRIDE 0x20000        /* allow override of default flags */

#define SECTION_TLS      0x40000        /* contains thread-local storage */

#define SECTION_NOTYPE   0x80000        /* don't output @progbits */

#define SECTION_MACH_DEP 0x100000       /* subsequent bits reserved for target */

/* A helper function for default_elf_select_section and

   default_elf_unique_section.  Categorizes the DECL.  */

enum section_category

{

  SECCAT_TEXT,

  SECCAT_RODATA,

  SECCAT_RODATA_MERGE_STR,

  SECCAT_RODATA_MERGE_STR_INIT,

  SECCAT_RODATA_MERGE_CONST,

  SECCAT_SRODATA,

  SECCAT_DATA,

  /* To optimize loading of shared programs, define following subsections

     of data section:

        _REL    Contains data that has relocations, so they get grouped

                together and dynamic linker will visit fewer pages in memory.

        _RO     Contains data that is otherwise read-only.  This is useful

                with prelinking as most relocations won't be dynamically

                linked and thus stay read only.

        _LOCAL  Marks data containing relocations only to local objects.

                These relocations will get fully resolved by prelinking.  */

  SECCAT_DATA_REL,

  SECCAT_DATA_REL_LOCAL,

  SECCAT_DATA_REL_RO,

  SECCAT_DATA_REL_RO_LOCAL,

  SECCAT_SDATA,

  SECCAT_TDATA,

  SECCAT_BSS,

  SECCAT_SBSS,

  SECCAT_TBSS

};

extern bool set_named_section_flags (const char *, unsigned int);

#define named_section_flags(NAME, FLAGS) \

  named_section_real((NAME), (FLAGS), /*decl=*/NULL_TREE)

extern void named_section_real (const char *, unsigned int, tree);

extern bool named_section_first_declaration (const char *);

extern unsigned int default_section_type_flags (tree, const char *, int);

extern unsigned int default_section_type_flags_1 (tree, const char *, int, int);

extern void default_no_named_section (const char *, unsigned int, tree);

extern void default_elf_asm_named_section (const char *, unsigned int, tree);

extern enum section_category categorize_decl_for_section (tree, int, int);

extern void default_coff_asm_named_section (const char *, unsigned int, tree);

extern void default_pe_asm_named_section (const char *, unsigned int, tree);

extern void default_stabs_asm_out_destructor (rtx, int);

extern void default_named_section_asm_out_destructor (rtx, int);

extern void default_dtor_section_asm_out_destructor (rtx, int);

extern void default_stabs_asm_out_constructor (rtx, int);

extern void default_named_section_asm_out_constructor (rtx, int);

extern void default_ctor_section_asm_out_constructor (rtx, int);

extern void default_select_section (tree, int, unsigned HOST_WIDE_INT);

extern void default_elf_select_section (tree, int, unsigned HOST_WIDE_INT);

extern void default_elf_select_section_1 (tree, int,

                                          unsigned HOST_WIDE_INT, int);

extern void default_unique_section (tree, int);

extern void default_unique_section_1 (tree, int, int);

extern void default_function_rodata_section (tree);

extern void default_no_function_rodata_section (tree);

extern void default_select_rtx_section (enum machine_mode, rtx,

                                        unsigned HOST_WIDE_INT);

extern void default_elf_select_rtx_section (enum machine_mode, rtx,

                                            unsigned HOST_WIDE_INT);

extern void default_encode_section_info (tree, rtx, int);

extern const char *default_strip_name_encoding (const char *);

extern bool default_binds_local_p (tree);

extern bool default_binds_local_p_1 (tree, int);

extern void default_globalize_label (FILE *, const char *);

extern void default_emit_unwind_label (FILE *, tree, int, int);

extern void default_internal_label (FILE *, const char *, unsigned long);

extern void default_file_start (void);

extern void file_end_indicate_exec_stack (void);

extern bool default_valid_pointer_mode (enum machine_mode);

extern int default_address_cost (rtx);

/* dbxout helper functions */

#if defined DBX_DEBUGGING_INFO || defined XCOFF_DEBUGGING_INFO

extern void dbxout_int (int);

extern void dbxout_stabd (int, int);

extern void dbxout_begin_stabn (int);

extern void dbxout_begin_stabn_sline (int);

extern void dbxout_begin_empty_stabs (int);

extern void dbxout_begin_simple_stabs (const char *, int);

extern void dbxout_begin_simple_stabs_desc (const char *, int, int);

extern void dbxout_stab_value_zero (void);

extern void dbxout_stab_value_label (const char *);

extern void dbxout_stab_value_label_diff (const char *, const char *);

extern void dbxout_stab_value_internal_label (const char *, int *);

extern void dbxout_stab_value_internal_label_diff (const char *, int *,

                                                   const char *);

#endif

#endif /* ! GCC_OUTPUT_H */