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Diffstat (limited to 'gcc-4.2.1-5666.3/gcc/output.h')
| -rw-r--r-- | gcc-4.2.1-5666.3/gcc/output.h | 632 |
1 files changed, 632 insertions, 0 deletions
diff --git a/gcc-4.2.1-5666.3/gcc/output.h b/gcc-4.2.1-5666.3/gcc/output.h new file mode 100644 index 000000000..fda098bc3 --- /dev/null +++ b/gcc-4.2.1-5666.3/gcc/output.h @@ -0,0 +1,632 @@ +/* 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 + +/* 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. */ + +/* 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 *); + +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); + +/* Compute the alignment of variable specified by DECL. + DONT_OUTPUT_DATA is from assemble_variable. */ +extern void align_variable (tree decl, bool dont_output_data); + +/* 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 + +extern void output_shared_constant_pool (void); + +extern void output_object_blocks (void); + +/* Whether a constructor CTOR is a valid static constant initializer if all + its elements are. This used to be internal to initializer_constant_valid_p + and has been exposed to let other functions like categorize_ctor_elements + evaluate the property while walking a constructor for other purposes. */ + +extern bool constructor_static_from_elts_p (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; + +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); + +/* 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); + +/* 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_DECLARED 0x100000 /* section has been used */ +#define SECTION_STYLE_MASK 0x600000 /* bits used for SECTION_STYLE */ +#define SECTION_COMMON 0x800000 /* contains common data */ +#define SECTION_MACH_DEP 0x1000000 /* subsequent bits reserved for target */ + +/* This SECTION_STYLE is used for unnamed sections that we can switch + to using a special assembler directive. */ +#define SECTION_UNNAMED 0x000000 + +/* This SECTION_STYLE is used for named sections that we can switch + to using a general section directive. */ +#define SECTION_NAMED 0x200000 + +/* This SECTION_STYLE is used for sections that we cannot switch to at + all. The choice of section is implied by the directive that we use + to declare the object. */ +#define SECTION_NOSWITCH 0x400000 + +/* 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 +}; + +/* Information that is provided by all instances of the section type. */ +struct section_common GTY(()) { + /* The set of SECTION_* flags that apply to this section. */ + unsigned int flags; +}; + +/* Information about a SECTION_NAMED section. */ +struct named_section GTY(()) { + struct section_common common; + + /* The name of the section. */ + const char *name; + + /* If nonnull, the VAR_DECL or FUNCTION_DECL with which the + section is associated. */ + tree decl; +}; + +/* A callback that writes the assembly code for switching to an unnamed + section. The argument provides callback-specific data. */ +typedef void (*unnamed_section_callback) (const void *); + +/* Information about a SECTION_UNNAMED section. */ +struct unnamed_section GTY(()) { + struct section_common common; + + /* The callback used to switch to the section, and the data that + should be passed to the callback. */ + unnamed_section_callback GTY ((skip)) callback; + const void *GTY ((skip)) data; + + /* The next entry in the chain of unnamed sections. */ + section *next; +}; + +/* A callback that writes the assembly code for a decl in a + SECTION_NOSWITCH section. DECL is the decl that should be assembled + and NAME is the name of its SYMBOL_REF. SIZE is the size of the decl + in bytes and ROUNDED is that size rounded up to the next + BIGGEST_ALIGNMENT / BITS_PER_UNIT boundary. + + Return true if the callback used DECL_ALIGN to set the object's + alignment. A false return value implies that we are relying + on the rounded size to align the decl. */ +typedef bool (*noswitch_section_callback) (tree decl, const char *name, + unsigned HOST_WIDE_INT size, + unsigned HOST_WIDE_INT rounded); + +/* Information about a SECTION_NOSWITCH section. */ +struct noswitch_section GTY(()) { + struct section_common common; + + /* The callback used to assemble decls in this section. */ + noswitch_section_callback GTY ((skip)) callback; +}; + +/* Information about a section, which may be named or unnamed. */ +union section GTY ((desc ("SECTION_STYLE (&(%h))"))) +{ + struct section_common GTY ((skip)) common; + struct named_section GTY ((tag ("SECTION_NAMED"))) named; + struct unnamed_section GTY ((tag ("SECTION_UNNAMED"))) unnamed; + struct noswitch_section GTY ((tag ("SECTION_NOSWITCH"))) noswitch; +}; + +/* Return the style of section SECT. */ +#define SECTION_STYLE(SECT) ((SECT)->common.flags & SECTION_STYLE_MASK) + +struct object_block; + +/* Special well-known sections. */ +extern GTY(()) section *text_section; +extern GTY(()) section *data_section; +extern GTY(()) section *readonly_data_section; +extern GTY(()) section *sdata_section; +extern GTY(()) section *ctors_section; +extern GTY(()) section *dtors_section; +extern GTY(()) section *bss_section; +extern GTY(()) section *sbss_section; +extern GTY(()) section *exception_section; +extern GTY(()) section *eh_frame_section; +extern GTY(()) section *tls_comm_section; +extern GTY(()) section *comm_section; +extern GTY(()) section *lcomm_section; +extern GTY(()) section *bss_noswitch_section; + +extern GTY(()) section *in_section; +extern GTY(()) bool in_cold_section_p; + +extern section *get_unnamed_section (unsigned int, void (*) (const void *), + const void *); +extern section *get_section (const char *, unsigned int, tree); +extern section *get_named_section (tree, const char *, int); +extern void place_block_symbol (rtx); +extern rtx get_section_anchor (struct object_block *, HOST_WIDE_INT, + enum tls_model); +extern section *mergeable_constant_section (enum machine_mode, + unsigned HOST_WIDE_INT, + unsigned int); +extern section *function_section (tree); +extern section *unlikely_text_section (void); +extern section *current_function_section (void); + +extern bool unlikely_text_section_p (section *); +extern void switch_to_section (section *); +extern void output_section_asm_op (const void *); + +extern unsigned int default_section_type_flags (tree, const char *, int); + +extern bool have_global_bss_p (void); +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); +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 section *default_select_section (tree, int, unsigned HOST_WIDE_INT); +extern section *default_elf_select_section (tree, int, unsigned HOST_WIDE_INT); +extern void default_unique_section (tree, int); +extern section *default_function_rodata_section (tree); +extern section *default_no_function_rodata_section (tree); +extern section *default_select_rtx_section (enum machine_mode, rtx, + unsigned HOST_WIDE_INT); +extern section *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 void default_asm_output_anchor (rtx); +extern bool default_use_anchors_for_symbol_p (rtx); +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_emit_except_table_label (FILE *); +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 */ |