GCC Middle and Back End API Reference
varasm.c File Reference

Data Structures

struct  addr_const
struct  rtx_constant_pool
struct  constant_descriptor_rtx
struct  oc_outer_state
struct  oc_local_state
struct  tm_alias_pair


typedef struct tm_alias_pair tm_alias_pair


static const char * strip_reg_name (const char *)
static int contains_pointers_p (tree)
static bool incorporeal_function_p (tree)
static void decode_addr_const (tree, struct addr_const *)
static hashval_t const_desc_hash (const void *)
static int const_desc_eq (const void *, const void *)
static hashval_t const_hash_1 (const tree)
static int compare_constant (const tree, const tree)
static tree copy_constant (tree)
static void output_constant_def_contents (rtx)
static void output_addressed_constants (tree)
static unsigned HOST_WIDE_INT array_size_for_constructor (tree)
static unsigned min_align (unsigned, unsigned)
static void globalize_decl (tree)
static bool decl_readonly_section_1 (enum section_category)
static void asm_output_aligned_bss (FILE *, tree, const char *, unsigned HOST_WIDE_INT, int)
static void mark_weak (tree)
static void output_constant_pool (const char *, tree)
static int section_entry_eq ()
static hashval_t section_entry_hash ()
static hashval_t hash_section ()
static int object_block_entry_eq ()
static hashval_t object_block_entry_hash ()
sectionget_unnamed_section (unsigned int flags, void(*callback)(const void *), const void *data)
static sectionget_noswitch_section ()
sectionget_section ()
static bool use_object_blocks_p ()
static struct object_blockget_block_for_section ()
static rtx create_block_symbol (const char *label, struct object_block *block, HOST_WIDE_INT offset)
sectionget_named_section ()
void resolve_unique_section (tree decl, int reloc, int flag_function_or_data_sections)
static sectionhot_function_section ()
sectionget_named_text_section (tree decl, const char *text_section_name, const char *named_section_suffix)
sectiondefault_function_section (tree decl, enum node_frequency freq, bool startup, bool exit)
static sectionfunction_section_1 ()
sectionfunction_section ()
sectioncurrent_function_section ()
sectionunlikely_text_section ()
bool unlikely_text_section_p ()
sectiondefault_function_rodata_section ()
sectiondefault_no_function_rodata_section ()
static sectionmergeable_string_section (tree decl, unsigned HOST_WIDE_INT align, unsigned int flags)
sectionmergeable_constant_section (enum machine_mode mode, unsigned HOST_WIDE_INT align, unsigned int flags)
static const char * strip_reg_name ()
void set_user_assembler_name ()
int decode_reg_name_and_count ()
int decode_reg_name ()
bool bss_initializer_p ()
void align_variable ()
static unsigned int get_variable_align ()
sectionget_variable_section ()
static struct object_blockget_block_for_decl ()
static void change_symbol_block ()
static bool use_blocks_for_decl_p ()
void make_decl_rtl ()
rtx make_decl_rtl_for_debug ()
void assemble_asm ()
void assemble_addr_to_section ()
sectionget_cdtor_priority_section ()
void default_named_section_asm_out_destructor ()
void default_dtor_section_asm_out_destructor (rtx symbol, int priority)
void default_named_section_asm_out_constructor ()
void default_ctor_section_asm_out_constructor (rtx symbol, int priority)
void notice_global_symbol ()
void decide_function_section ()
void assemble_start_function ()
void assemble_end_function ()
void assemble_zeros ()
void assemble_align ()
void assemble_string ()
static bool emit_local (tree decl, const char *name, unsigned HOST_WIDE_INT size, unsigned HOST_WIDE_INT rounded)
static bool emit_bss (tree decl, const char *name, unsigned HOST_WIDE_INT size, unsigned HOST_WIDE_INT rounded)
static bool emit_common (tree decl, const char *name, unsigned HOST_WIDE_INT size, unsigned HOST_WIDE_INT rounded)
static bool emit_tls_common (tree decl, const char *name, unsigned HOST_WIDE_INT size, unsigned HOST_WIDE_INT rounded)
static void assemble_noswitch_variable (tree decl, const char *name, section *sect, unsigned int align)
static void assemble_variable_contents (tree decl, const char *name, bool dont_output_data)
void assemble_variable (tree decl, int top_level, int at_end, int dont_output_data)
void assemble_vtv_preinit_initializer ()
static int contains_pointers_p ()
static bool incorporeal_function_p ()
static void assemble_external_real ()
void process_pending_assemble_externals ()
void assemble_external ()
void assemble_external_libcall ()
void assemble_label ()
void mark_referenced ()
void mark_decl_referenced ()
static tree ultimate_transparent_alias_target ()
void assemble_name_raw ()
void assemble_name ()
rtx assemble_static_space ()
rtx assemble_trampoline_template ()
static unsigned min_align ()
const char * integer_asm_op ()
void assemble_integer_with_op ()
bool default_assemble_integer (rtx x, unsigned int size, int aligned_p)
bool assemble_integer ()
void assemble_real ()
static void decode_addr_const ()
static void maybe_output_constant_def_contents (struct constant_descriptor_tree *, int)
htab_t constant_pool_htab ()
static hashval_t const_desc_hash ()
static hashval_t const_hash_1 ()
static int const_desc_eq ()
static int compare_constant ()
static tree copy_constant ()
static sectionget_constant_section ()
static HOST_WIDE_INT get_constant_size ()
static struct
build_constant_desc ()
rtx output_constant_def ()
static void assemble_constant_contents ()
static void output_constant_def_contents ()
rtx lookup_constant_def ()
tree tree_output_constant_def ()
static hashval_t const_desc_rtx_hash ()
static int const_desc_rtx_eq ()
static int const_rtx_hash_1 ()
static hashval_t const_rtx_hash ()
static struct rtx_constant_poolcreate_constant_pool ()
void init_varasm_status ()
rtx simplify_subtraction ()
rtx force_const_mem ()
rtx get_pool_constant ()
rtx get_pool_constant_mark ()
enum machine_mode get_pool_mode ()
int get_pool_size ()
static void output_constant_pool_2 ()
static void output_constant_pool_1 (struct constant_descriptor_rtx *desc, unsigned int align)
static int mark_constant ()
static void mark_constants ()
static void mark_constant_pool ()
static void output_constant_pool_contents ()
void output_shared_constant_pool ()
int compute_reloc_for_constant ()
static void output_addressed_constants ()
bool constructor_static_from_elts_p ()
static tree initializer_constant_valid_p_1 (tree value, tree endtype, tree *cache)
static tree narrowing_initializer_constant_valid_p ()
static tree initializer_constant_valid_p_1 ()
tree initializer_constant_valid_p ()
bool initializer_constant_valid_for_bitfield_p ()
static unsigned HOST_WIDE_INT output_constructor (tree, unsigned HOST_WIDE_INT, unsigned int, oc_outer_state *)
void output_constant ()
static unsigned HOST_WIDE_INT array_size_for_constructor ()
static void output_constructor_array_range ()
static void output_constructor_regular_field ()
static void output_constructor_bitfield ()
static void mark_weak ()
void merge_weak ()
void declare_weak ()
static void weak_finish_1 ()
static tree find_decl ()
void weak_finish ()
static void globalize_decl ()
void do_assemble_alias ()
void assemble_alias ()
void record_tm_clone_pair ()
tree get_tm_clone_pair ()
static int dump_tm_clone_to_vec ()
static void dump_tm_clone_pairs ()
sectiondefault_clone_table_section ()
static int tm_alias_pair_cmp ()
void finish_tm_clone_pairs ()
void default_assemble_visibility (tree decl, int vis)
int maybe_assemble_visibility ()
int supports_one_only ()
void make_decl_one_only ()
void init_varasm_once ()
enum tls_model decl_default_tls_model ()
unsigned int default_section_type_flags ()
bool have_global_bss_p ()
void default_no_named_section (const char *name, unsigned int flags, tree decl)
void default_elf_asm_named_section (const char *name, unsigned int flags, tree decl)
void default_coff_asm_named_section (const char *name, unsigned int flags, tree decl)
void default_pe_asm_named_section (const char *name, unsigned int flags, tree decl)
sectiondefault_select_section (tree decl, int reloc, unsigned HOST_WIDE_INT align)
enum section_category categorize_decl_for_section ()
static bool decl_readonly_section_1 ()
bool decl_readonly_section ()
sectiondefault_elf_select_section (tree decl, int reloc, unsigned HOST_WIDE_INT align)
void default_unique_section ()
static int compute_reloc_for_rtx_1 ()
static int compute_reloc_for_rtx ()
sectiondefault_select_rtx_section (enum machine_mode mode, rtx x, unsigned HOST_WIDE_INT align)
sectiondefault_elf_select_rtx_section (enum machine_mode mode, rtx x, unsigned HOST_WIDE_INT align)
void default_encode_section_info ()
const char * default_strip_name_encoding ()
void default_asm_output_anchor ()
bool default_use_anchors_for_symbol_p ()
static bool resolution_to_local_definition_p ()
static bool resolution_local_p ()
bool default_binds_local_p ()
bool default_binds_local_p_1 ()
bool decl_binds_to_current_def_p ()
bool decl_replaceable_p ()
void default_globalize_label ()
void default_globalize_decl_name ()
void default_emit_unwind_label (FILE *stream, tree decl, int for_eh, int empty)
void default_emit_except_table_label ()
void default_generate_internal_label (char *buf, const char *prefix, unsigned long labelno)
void default_internal_label (FILE *stream, const char *prefix, unsigned long labelno)
void default_asm_declare_constant_name (FILE *file, const char *name, const_tree exp, HOST_WIDE_INT size)
void default_file_start ()
void file_end_indicate_exec_stack ()
void file_end_indicate_split_stack ()
void output_section_asm_op ()
void switch_to_section ()
void place_block_symbol ()
rtx get_section_anchor (struct object_block *block, HOST_WIDE_INT offset, enum tls_model model)
static void output_object_block ()
static int output_object_block_htab ()
void output_object_blocks ()
int elf_record_gcc_switches ()
void default_elf_asm_output_external (FILE *file, tree decl, const char *name)
void default_asm_output_source_filename ()
void output_file_directive ()
rtx make_debug_expr_from_rtl ()
void default_elf_asm_output_limited_string ()
void default_elf_asm_output_ascii ()
static sectionget_elf_initfini_array_priority_section (int priority, bool constructor_p)
void default_elf_init_array_asm_out_constructor ()
void default_elf_fini_array_asm_out_destructor ()
void default_asm_output_ident_directive ()


const char * first_global_object_name
const char * weak_global_object_name
static int const_labelno
int size_directive_output
tree last_assemble_variable_decl
bool first_function_block_is_cold
static alias_set_type const_alias_set
static bool saw_no_split_stack
bool in_cold_section_p
static sectionunnamed_sections
static htab_t section_htab
static htab_t object_block_htab
static int anchor_labelno
static struct rtx_constant_poolshared_constant_pool
static tree pending_assemble_externals
static bool pending_assemble_externals_processed
static struct pointer_set_tpending_assemble_externals_set
static tree weak_decls
static rtx initial_trampoline
static htab_t const_desc_htab
static tree weakref_targets
vec< alias_pair, va_gc > * alias_pairs
static htab_t tm_clone_hash
int trampolines_created
static sectionelf_init_array_section
static sectionelf_fini_array_section

Typedef Documentation

typedef struct tm_alias_pair tm_alias_pair

Function Documentation

void align_variable ( )
   Compute the alignment of variable specified by DECL.
   DONT_OUTPUT_DATA is from assemble_variable.  
     In the case for initialing an array whose length isn't specified,
     where we have not yet been able to do the layout,
     figure out the proper alignment now.  
     Some object file formats have a maximum alignment which they support.
     In particular, a.out format supports a maximum alignment of 4.  
         For backwards compatibility, don't assume the ABI alignment for
         TLS variables.  
         On some machines, it is good to increase alignment sometimes.
         But as DECL_ALIGN is used both for actually emitting the variable
         and for code accessing the variable as guaranteed alignment, we
         can only increase the alignment if it is a performance optimization
         if the references to it must bind to the current definition.  
             Don't increase alignment too much for TLS variables - TLS space
             is too precious.  
                 Don't increase alignment too much for TLS variables - TLS
                 space is too precious.  
     Reset the alignment in case we have made it tighter, so we can benefit
     from it in get_pointer_alignment.  

References decl_binds_to_current_def_p().

static unsigned HOST_WIDE_INT array_size_for_constructor ( tree  )
static unsigned HOST_WIDE_INT array_size_for_constructor ( )
   Subroutine of output_constructor, used for computing the size of
   arrays of unspecified length.  VAL must be a CONSTRUCTOR of an array
   type with an unspecified upper bound.  
     This code used to attempt to handle string constants that are not
     arrays of single-bytes, but nothing else does, so there's no point in
     doing it here.  
     Compute the total number of array elements.  
     Multiply by the array element unit size to find number of bytes.  
static void asm_output_aligned_bss ( FILE *  file,
tree  decl,
const char *  name,
unsigned HOST_WIDE_INT  size,
int  align 
   Utility function for targets to use in implementing
   ??? It is believed that this function will work in most cases so such
   support is localized here.  
     Standard thing is just output label for the object.  

References buffer, get_named_section(), memcpy(), and targetm.

void assemble_addr_to_section ( )
   Write the address of the entity given by SYMBOL to SEC.  
void assemble_alias ( )
   Emit an assembler directive to make the symbol for DECL an alias to
   the symbol for TARGET.  
     Allow aliases to aliases.  
     If the target has already been emitted, we don't have to queue the
     alias.  This saves a tad of memory.  
void assemble_align ( )
   Assemble an alignment pseudo op for an ALIGN-bit boundary.  

References asm_out_file, and symtab_node_base::decl.

void assemble_asm ( )
   Output a string of literal assembler code
   for an `asm' keyword used between functions.  

References targetm.

static void assemble_constant_contents ( )
   Subroutine of output_constant_def_contents.  Output the definition
   of constant EXP, which is pointed to by label LABEL.  ALIGN is the
   constant's alignment in bits.  
     Do any machine/system dependent processing of the constant.  
     Output the value of EXP.  
void assemble_end_function ( )
   Output assembler code associated with defining the size of the
   function.  DECL describes the function.  NAME is the function's name.  
     We could have switched section in the middle of the function.  
     Output labels for end of hot/cold text sections (to be used by
     debug info.)  
void assemble_external ( )
   Output something to declare an external symbol to the assembler,
   and qualifiers such as weakness.  (Most assemblers don't need
   extern declaration, so we normally output nothing.)  Do nothing if
   DECL is not external.  
      Make sure that the ASM_OUT_FILE is open.
      If it's not, we should not be calling this function.  
     In a perfect world, the following condition would be true.
     Sadly, the Java and Go front ends emit assembly *from the front end*,
     bypassing the call graph.  See PR52739.  Fix before GCC 4.8.  
     This function should only be called if we are expanding, or have
     expanded, to RTL.
     Ideally, only final.c would be calling this function, but it is
     not clear whether that would break things somehow.  See PR 17982
     for further discussion.  
     We want to output annotation for weak and external symbols at
     very last to check if they are references or not.  
         TREE_STATIC is a weird and abused creature which is not
         generally the right test for whether an entity has been
         locally emitted, inlined or otherwise not-really-extern, but
         for declarations that can be weak, it happens to be
void assemble_external_libcall ( )
   Similar, for calling a library function FUN.  
     Declare library function name external when first used, if nec.  
static void assemble_external_real ( )
   Actually do the tests to determine if this is necessary, and invoke
         Some systems do require some output.  

References mark_referenced(), maybe_get_identifier(), targetm, and ultimate_transparent_alias_target().

bool assemble_integer ( )
   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.  We must be able to output the constant,
   if FORCE is nonzero.  
     See if the target hook can handle this kind of object.  
     If the object is a multi-byte one, try splitting it up.  Split
     it into words it if is multi-word, otherwise split it into bytes.  
         If we've printed some of it, but not all of it, there's no going
         back now.  

References const_hash_1().

void assemble_integer_with_op ( )
   Use directive OP to assemble an integer object X.  Print OP at the
   start of the line, followed immediately by the value of X.  

References len.

void assemble_label ( )
   Assemble a label named NAME.  
void assemble_name ( )
   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.  
void assemble_name_raw ( )
   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).  
static void assemble_noswitch_variable ( tree  decl,
const char *  name,
section sect,
unsigned int  align 
   Assemble DECL given that it belongs in SECTION_NOSWITCH section SECT.
   NAME is the name of DECL's SYMBOL_REF.  
     Don't allocate zero bytes of common,
     since that means "undefined external" in the linker.  
     Round size up to multiple of BIGGEST_ALIGNMENT bits
     so that each uninitialized object starts on such a boundary.  
void assemble_real ( )
     This is hairy.  We have a quantity of known size.  real_to_target
     will put it into an array of *host* longs, 32 bits per element
     (even if long is more than 32 bits).  We need to determine the
     number of array elements that are occupied (nelts) and the number
     of *target* min-addressable units that will be occupied in the
     object file (nunits).  We cannot assume that 32 divides the
     mode's bitsize (size * BITS_PER_UNIT) evenly.

     size * BITS_PER_UNIT is used here to make sure that padding bits
     (which might appear at either end of the value; real_to_target
     will include the padding bits in its output array) are included.  
     Put out the first word with the specified alignment.  
     Subsequent words need only 32-bit alignment.  
void assemble_start_function ( )
   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.  
     The following code does not need preprocessing in the assembler.  
     Make sure the not and cold text (code) sections are properly
     aligned.  This is necessary here in the case where the function
     has both hot and cold sections, because we don't want to re-set
     the alignment when the section switch happens mid-function.  
         When the function starts with a cold section, we need to explicitly
         align the hot section and write out the hot section label.
         But if the current function is a thunk, we do not have a CFG.  
     Switch to the correct text section for the start of the function.  
     Tell assembler to move to target machine's alignment for functions.  
     Handle a user-specified function alignment.
     Note that we still need to align to DECL_ALIGN, as above,
     because ASM_OUTPUT_MAX_SKIP_ALIGN might not do any alignment at all.  
     Make function name accessible from other files, if appropriate.  
     Do any machine/system dependent processing of the function name.  
     Standard thing is just output label for the function.  
rtx assemble_static_space ( )
   Allocate SIZE bytes writable static space with a gensym name
   and return an RTX to refer to its address.  
       Round size up to multiple of BIGGEST_ALIGNMENT bits
       so that each uninitialized object starts on such a boundary.  
       Variable `rounded' might or might not be used in ASM_OUTPUT_LOCAL.  

References assemble_integer(), min_align(), and real_to_target().

void assemble_string ( )
   Assemble a string constant with the specified C string as contents.  
     If the string is very long, split it up.  

References assemble_zeros(), get_variable_align(), initializer_zerop(), output_constant(), and tree_low_cst().

rtx assemble_trampoline_template ( void  )
   Assemble the static constant template for function entry trampolines.  
     By default, put trampoline templates in read-only data section.  
     Write the assembler code to define one.  
     Record the rtl to refer to it.  
void assemble_variable ( tree  decl,
int  top_level,
int  at_end,
int  dont_output_data 
   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).  
     This function is supposed to handle VARIABLES.  Ensure we have one.  
     Emulated TLS had better not get this far.  
     Normally no need to say anything here for external references,
     since assemble_external is called by the language-specific code
     when a declaration is first seen.  
     Do nothing for global register variables.  
     If type was incomplete when the variable was declared,
     see if it is complete now.  
     Still incomplete => don't allocate it; treat the tentative defn
     (which is what it must have been) as an `extern' reference.  
     The first declaration of a variable that comes through this function
     decides whether it is global (in C, has external linkage)
     or local (in C, has internal linkage).  So do nothing more
     if this function has already run.  
     Make sure targetm.encode_section_info is invoked before we set
     Do no output if -fsyntax-only.  
     If this symbol belongs to the tree constant pool, output the constant
     if it hasn't already been written.  
     Compute the alignment of this data.  
     First make the assembler name(s) global if appropriate.  
     Output any data that we will need to use the address of.  
     dbxout.c needs to know this.  
     If the decl is part of an object_block, make sure that the decl
     has been positioned within its block, but do not write out its
     definition yet.  output_object_blocks will do that later.  
         The following bit of code ensures that vtable_map 
         variables are not only in the comdat section, but that
         each variable has its own unique comdat name.  If this
         code is removed, the variables end up in the same section
         with a single comdat name.

         FIXME:  resolve_unique_section needs to deal better with
         decls with both DECL_SECTION_NAME and DECL_ONE_ONLY.  Once
         that is fixed, this if-else statement can be replaced with
         a single call to "switch_to_section (sect)".  
static void assemble_variable_contents ( tree  decl,
const char *  name,
bool  dont_output_data 
   A subroutine of assemble_variable.  Output the label and contents of
   DECL, whose address is a SYMBOL_REF with name NAME.  DONT_OUTPUT_DATA
   is as for assemble_variable.  
     Do any machine/system dependent processing of the object.  
     Standard thing is just output label for the object.  
           Output the actual data.  
           Leave space for it.  
void assemble_vtv_preinit_initializer ( )
   Given a function declaration (FN_DECL), this function assembles the
   function into the .preinit_array section.  

References targetm.

void assemble_zeros ( )
   Assemble code to leave SIZE bytes of zeros.  
     Do no output if -fsyntax-only.  
     The `space' pseudo in the text section outputs nop insns rather than 0s,
     so we must output 0s explicitly in the text section.  
bool bss_initializer_p ( )
   Return true if DECL's initializer is suitable for a BSS section.  
                 Leave constant zeroes in .rodata so they
                 can be shared.  
static struct constant_descriptor_tree* build_constant_desc ( )
   Subroutine of output_constant_def:
   No constant equal to EXP is known to have been output.
   Make a constant descriptor to enter EXP in the hash table.
   Assign the label number and construct RTL to refer to the
   constant's location in memory.
   Caller is responsible for updating the hash table.  
     Create a string containing the label name, in LABEL.  
     Construct the VAR_DECL associated with the constant.  
     We don't set the RTL yet as this would cause varpool to assume that the
     variable is referenced.  Moreover, it would just be dropped in LTO mode.
     Instead we set the flag that will be recognized in make_decl_rtl.  
     ??? CONSTANT_ALIGNMENT hasn't been updated for vector types on most
     architectures so use DATA_ALIGNMENT as well, except for strings.  
     Now construct the SYMBOL_REF and the MEM.  
     We cannot share RTX'es in pool entries.
     Mark this piece of RTL as required for unsharing.  
     Set flags or add text to the name to record information, such as
     that it is a local symbol.  If the name is changed, the macro
     ASM_OUTPUT_LABELREF will have to know how to strip this
     information.  This call might invalidate our local variable
     SYMBOL; we can't use it afterward.  

Referenced by get_constant_size().

enum section_category categorize_decl_for_section ( )
         or !flag_merge_constants 
             Here the reloc_rw_mask is not testing whether the section should
             be read-only or not, but whether the dynamic link will have to
             do something.  If so, we wish to segregate the data in order to
             minimize cache misses inside the dynamic linker.  
           C and C++ don't allow different variables to share the same
           location.  -fmerge-all-constants allows even that (at the
           expense of not conforming).  
     There are no read-only thread-local sections.  
         Note that this would be *just* SECCAT_BSS, except that there's
         no concept of a read-only thread-local-data section.  
     If the target uses small data sections, select it.  
static void change_symbol_block ( )
   Make sure block symbol SYMBOL is in block BLOCK.  
static int compare_constant ( const tree  ,
const tree   

Referenced by decode_addr_const().

static int compare_constant ( )
   Compare t1 and t2, and return 1 only if they are known to result in
   the same bit pattern on output.  
         Integer constants are the same only if the same width of type.  
         Real constants are the same only if the same width of type.  
         Fixed constants are the same only if the same width of type.  
               For arrays, check that the sizes all match.  
               For record and union constructors, require exact type
               Check that each value is the same...  
               ... and that they apply to the same fields!  

References compute_reloc_for_constant(), and targetm.

int compute_reloc_for_constant ( )
   Determine what kind of relocations EXP may need.  
         Go inside any operations that get_inner_reference can handle and see
         if what's inside is a constant: no need to do anything here for
         addresses of variables or functions.  
         The difference of two local labels is computable at link time.  

References initializer_constant_valid_p_1().

static int compute_reloc_for_rtx ( )

References targetm.

static int compute_reloc_for_rtx_1 ( )
   Like compute_reloc_for_constant, except for an RTX.  The return value
   is a mask for which bit 1 indicates a global relocation, and bit 0
   indicates a local relocation.  

References asm_out_file.

static int const_desc_eq ( const void *  ,
const void *   
static int const_desc_eq ( )
   Wrapper of compare_constant, for the htab interface.  
static hashval_t const_desc_hash ( const void *  )
static hashval_t const_desc_hash ( )
   Compute a hash code for a constant expression.  
static int const_desc_rtx_eq ( )

References assemble_real().

static hashval_t const_desc_rtx_hash ( )
   Hash and compare functions for const_rtx_htab.  
static hashval_t const_hash_1 ( const tree  )
static hashval_t const_hash_1 ( )
     Either set P and LEN to the address and len of something to hash and
     exit the switch or return a value.  
               Don't hash the address of the SYMBOL_REF;
               only use the offset and the symbol name.  
         A language specific constant. Just hash the code.  
     Compute hashing function.  
static hashval_t const_rtx_hash ( )
   Compute a hash value for X, which should be a constant.  

References targetm.

static int const_rtx_hash_1 ( )
   This is the worker function for const_rtx_hash, called via for_each_rtx.  
htab_t constant_pool_htab ( void  )
   Constant pool accessor function.  
bool constructor_static_from_elts_p ( )
   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.  
static int contains_pointers_p ( tree  )
static int contains_pointers_p ( )
   Return 1 if type TYPE contains any pointers.  
         I'm not sure whether OFFSET_TYPE needs this treatment,
         so I'll play safe and return 1.  
           For a type that has fields, see if the fields have pointers.  
         An array type contains pointers if its element type does.  
static tree copy_constant ( tree  )
static tree copy_constant ( )
   Make a copy of the whole tree structure for a constant.  This
   handles the same types of nodes that compare_constant handles.  
         For ADDR_EXPR, we do not want to copy the decl whose address
         is requested.  We do want to copy constants though.  

References targetm.

static rtx create_block_symbol ( const char *  label,
struct object_block block,
HOST_WIDE_INT  offset 
   Create a symbol with label LABEL and place it at byte offset
   OFFSET in BLOCK.  OFFSET can be negative if the symbol's offset
   is not yet known.  LABEL must be a garbage-collected string.  
     Create the extended SYMBOL_REF.  
     Initialize the normal SYMBOL_REF fields.  
     Initialize the block_symbol stuff.  
static struct rtx_constant_pool* create_constant_pool ( )
   Create and return a new rtx constant pool.  
section* current_function_section ( void  )
   Return the section for the current function, take IN_COLD_SECTION_P
   into account.  
void decide_function_section ( )
   If not using flag_reorder_blocks_and_partition, decide early whether the
   current function goes into the cold section, so that targets can use
   current_function_section during RTL expansion.  DECL describes the
       We will decide in assemble_start_function.  
         Calls to function_section rely on first_function_block_is_cold
         being accurate.  

References globalize_decl(), maybe_assemble_visibility(), and notice_global_symbol().

bool decl_binds_to_current_def_p ( )
   Return true when references to DECL must bind to current definition in
   final executable.

   The condition is usually equivalent to whether the function binds to the
   current module (shared library or executable), that is to binds_local_p.
   We use this fact to avoid need for another target hook and implement
   the logic using binds_local_p and just special cases where
   decl_binds_to_current_def_p is stronger than binds_local_p.  In particular
   the weak definitions (that can be overwritten at linktime by other
   definition from different object file) and when resolution info is available
   we simply use the knowledge passed to us by linker plugin.  
     When resolution is available, just use it.  
     Otherwise we have to assume the worst for DECL_WEAK (hidden weaks
     binds locally but still can be overwritten), DECL_COMMON (can be merged
     with a non-common definition somewhere in the same module) or
     This rely on fact that binds_local_p behave as decl_replaceable_p
     for all other declaration types.  
enum tls_model decl_default_tls_model ( )
     Local dynamic is inefficient when we're not combining the
     parts of the address.  
bool decl_readonly_section ( )
static bool decl_readonly_section_1 ( enum  section_category)

Referenced by make_decl_one_only().

static bool decl_readonly_section_1 ( )
bool decl_replaceable_p ( )
   A replaceable function or variable is one which may be replaced
   at link-time with an entirely different definition, provided that the
   replacement has the same type.  For example, functions declared
   with __attribute__((weak)) on most systems are replaceable.

   COMDAT functions are not replaceable, since all definitions of the
   function must be equivalent.  It is important that COMDAT functions
   not be treated as replaceable so that use of C++ template
   instantiations is not penalized.  
void declare_weak ( )
   Declare DECL to be a weak symbol.  

References cgraph_get_node(), symtab_node_base::definition, tm_alias_pair::from, and tm_alias_pair::to.

static void decode_addr_const ( tree  ,
struct addr_const  
static void decode_addr_const ( )
int decode_reg_name ( )
int decode_reg_name_and_count ( )
   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.  
     Presume just one register is clobbered.  
         Get rid of confusing prefixes.  
         Allow a decimal number as a "register name".  
void default_asm_declare_constant_name ( FILE *  file,
const char *  name,
const_tree  exp,
   The default implementation of ASM_DECLARE_CONSTANT_NAME.  
void default_asm_output_anchor ( )
   The default implementation of TARGET_ASM_OUTPUT_ANCHOR.  Define the
   anchor relative to ".", the current section position.  

References HOST_WIDE_INT, ptr_mode, and targetm.

void default_asm_output_ident_directive ( )

   This is a bit of a cheat.  The real default is a no-op, but this
   hook is the default for all targets with a .ident directive.  
     If we are still in the front end, do not write out the string
     to asm_out_file.  Instead, add a fake top-level asm statement.
     This allows the front ends to use this hook without actually
     writing to asm_out_file, to handle #ident or Pragma Ident.  
void default_asm_output_source_filename ( )
   The default hook for TARGET_ASM_OUTPUT_SOURCE_FILENAME.  
bool default_assemble_integer ( rtx  x,
unsigned int  size,
int  aligned_p 
   The default implementation of the asm_out.integer target hook.  
     Avoid GAS bugs for large values.  Specifically negative values whose
     absolute value fits in a bfd_vma, but not in a bfd_signed_vma.  

References const_hash_1(), fixed_hash(), and real_hash().

void default_assemble_visibility ( tree  decl,
int  vis 
   Emit an assembler directive to set symbol for DECL visibility to
   the visibility type VIS, which must not be VISIBILITY_DEFAULT.  
bool default_binds_local_p ( )
   Assume ELF-ish defaults, since that's pretty much the most liberal
   wrt cross-module name binding.  

References assemble_zeros().

bool default_binds_local_p_1 ( )
     With resolution file in hands, take look into resolutions.
     We can't just return true for resolved_locally symbols,
     because dynamic linking might overwrite symbols
     in shared libraries.  
     A non-decl is an entry in the constant pool.  
     Weakrefs may not bind locally, even though the weakref itself is always
     static and therefore local.  Similarly, the resolver for ifunc functions
     might resolve to a non-local function.
     FIXME: We can resolve the weakref case more curefuly by looking at the
     weakref alias.  
     Static variables are always local.  
     A variable is local if the user has said explicitly that it will
     Variables defined outside this object might not be local.  
     If defined in this object and visibility is not default, must be
     Default visibility weak data can be overridden by a strong symbol
     in another module and so are not local.  
     If PIC, then assume that any global name can be overridden by
     symbols resolved from other modules.  
     Uninitialized COMMON variable may be unified with symbols
     resolved from other modules.  
     Otherwise we're left with initialized (or non-common) global data
     which is of necessity defined locally.  
section* default_clone_table_section ( void  )
   Provide a default for the tm_clone_table section.  
void default_coff_asm_named_section ( const char *  name,
unsigned int  flags,
tree  decl 
void default_ctor_section_asm_out_constructor ( rtx  symbol,
int  priority 
void default_dtor_section_asm_out_destructor ( rtx  symbol,
int  priority 
void default_elf_asm_named_section ( const char *  name,
unsigned int  flags,
tree  decl 
     If we have already declared this section, we can use an
     abbreviated form to switch back to it -- unless this section is
     part of a COMDAT groups, in which case GAS requires the full
     declaration every time.  
         On platforms that use "@" as the assembly comment character,
         use "%" instead.  
void default_elf_asm_output_ascii ( )
   Default ASM_OUTPUT_ASCII for ELF targets.  
                 TODO: Print in hex with fast function, important for -flto. 
void default_elf_asm_output_external ( FILE *  file,
tree  decl,
const char *  name 
   Emit text to declare externally defined symbols. It is needed to
   properly support non-default visibility.  
     We output the name if and only if TREE_SYMBOL_REFERENCED is
     set in order to avoid putting out names that are never really
void default_elf_asm_output_limited_string ( )
   Default ASM_OUTPUT_LIMITED_STRING for ELF targets.  
             TODO: Print in hex with fast function, important for -flto. 
void default_elf_fini_array_asm_out_destructor ( )
   Use .fini_array section for destructors. 
void default_elf_init_array_asm_out_constructor ( )
   Use .init_array section for constructors. 
section* default_elf_select_rtx_section ( enum machine_mode  mode,
rtx  x,
unsigned HOST_WIDE_INT  align 
     ??? Handle small data here somehow.  

References constant_descriptor_rtx::align, and constant_descriptor_rtx::mode.

section* default_elf_select_section ( tree  decl,
int  reloc,
unsigned HOST_WIDE_INT  align 
   Select a section based on the above categorization.  
         We're not supposed to be called on FUNCTION_DECLs.  

References decl_binds_to_current_def_p().

void default_emit_except_table_label ( )
   Default function to output a label to divide up the exception table.
   The default is to do nothing.  A target that needs/wants to divide
   up the table must provide it's own function to do this.  
void default_emit_unwind_label ( FILE *  stream,
tree  decl,
int  for_eh,
int  empty 
   Default function to output a label for unwind information.  The
   default is to do nothing.  A target that needs nonlocal labels for
   unwind information must provide its own function to do this.  
void default_encode_section_info ( )
   Set the generally applicable flags on the SYMBOL_REF for EXP.  
     Careful not to prod global register variables.  
     ??? Why is DECL_EXTERNAL ever set for non-PUBLIC names?  Without
     being PUBLIC, the thing *must* be defined in this translation unit.
     Prevent this buglet from being propagated into rtl code as well.  
void default_file_start ( void  )
   This is the default behavior at the beginning of a file.  It's
   controlled by two other target-hook toggles.  
section* default_function_rodata_section ( )
   Return the read-only data section associated with function DECL.  
         For .gnu.linkonce.t.foo we want to use .gnu.linkonce.r.foo.  
         For .text.foo we want to use .rodata.foo.  
section* default_function_section ( tree  decl,
enum node_frequency  freq,
bool  startup,
bool  exit 
   Choose named function section based on its frequency.  
     Old GNU linkers have buggy --gc-section support, which sometimes
     results in .gcc_except_table* sections being garbage collected.  
     Startup code should go to startup subsection unless it is
     unlikely executed (this happens especially with function splitting
     where we can split away unnecessary parts of static constructors.  
     Similarly for exit.  
     Group cold functions together, similarly for hot code.  

References cgraph_get_node(), get_named_section(), hot_function_section(), NODE_FREQUENCY_NORMAL, NODE_FREQUENCY_UNLIKELY_EXECUTED, cgraph_node::only_called_at_exit, cgraph_node::only_called_at_startup, and targetm.

void default_generate_internal_label ( char *  buf,
const char *  prefix,
unsigned long  labelno 
   This is how to output an internal numbered label where PREFIX is
   the class of label and LABELNO is the number within the class.  
void default_globalize_decl_name ( )
   Default function to output code that will globalize a declaration.  
void default_globalize_label ( )
   Default function to output code that will globalize a label.  A
   target must define GLOBAL_ASM_OP or provide its own function to
   globalize a label.  
void default_internal_label ( FILE *  stream,
const char *  prefix,
unsigned long  labelno 
   This is how to output an internal numbered label where PREFIX is
   the class of label and LABELNO is the number within the class.  

References len, and limit.

void default_named_section_asm_out_constructor ( )
void default_named_section_asm_out_destructor ( )
section* default_no_function_rodata_section ( )
   Return the read-only data section associated with function DECL
   for targets where that section should be always the single
   readonly data section.  
void default_no_named_section ( const char *  name,
unsigned int  flags,
tree  decl 
   Output assembly to switch to section NAME with attribute FLAGS.
   Four variants for common object file formats.  
     Some object formats don't support named sections at all.  The
     front-end should already have flagged this as an error.  

References targetm.

void default_pe_asm_named_section ( const char *  name,
unsigned int  flags,
tree  decl 
         Functions may have been compiled at various levels of
         optimization so we can't use `same_size' here.
         Instead, have the linker pick one.  
unsigned int default_section_type_flags ( )
   Select a set of attributes for section NAME based on the properties
   of DECL and whether or not RELOC indicates that DECL's initializer
   might contain runtime relocations.

   We make the section read-only and executable for a function decl,
   read-only for a const data decl, and writable for a non-const data decl.  
     These three sections have special ELF types.  They are neither
     SHT_PROGBITS nor SHT_NOBITS, so when changing sections we don't
     want to print a section type (@progbits or @nobits).  If someone
     is silly enough to emit code or TLS variables to one of these
     sections, then don't handle them specially.  
section* default_select_rtx_section ( enum machine_mode  mode,
rtx  x,
unsigned HOST_WIDE_INT  align 

References offset.

section* default_select_section ( tree  decl,
int  reloc,
unsigned HOST_WIDE_INT  align 
   The lame default section selector.  

References resolution_local_p(), resolution_to_local_definition_p(), and varpool_get_node().

const char* default_strip_name_encoding ( )
   By default, we do nothing for encode_section_info, so we need not
   do anything but discard the '*' marker.  
void default_unique_section ( )
   Construct a unique section name based on the decl name and the
   categorization performed above.  
     We only need to use .gnu.linkonce if we don't have COMDAT groups.  
     If we're using one_only, then there needs to be a .gnu.linkonce
     prefix to the section name.  

References strlen().

bool default_use_anchors_for_symbol_p ( )
   The default implementation of TARGET_USE_ANCHORS_FOR_SYMBOL_P.  
     Don't use anchors for mergeable sections.  The linker might move
     the objects around.  
     Don't use anchors for small data sections.  The small data register
     acts as an anchor for such sections.  
         Don't use section anchors for decls that might be defined or
         usurped by other modules.  
         Don't use section anchors for decls that will be placed in a
         small data section.  
         ??? Ideally, this check would be redundant with the SECTION_SMALL
         one above.  The problem is that we only use SECTION_SMALL for
         sections that should be marked as small in the section directive.  
void do_assemble_alias ( )
   Output the assembler code for a define (equate) using ASM_OUTPUT_DEF
   or ASM_OUTPUT_DEF_FROM_DECLS.  The function defines the symbol whose
   tree node is DECL to have the value of the tree node TARGET.  
     Emulated TLS had better not get this var.  
     We must force creation of DECL_RTL for debug info generation, even though
     we don't use it here.  
     Make name accessible from other files, if appropriate.  
       Remove this function from the pending weak list so that
       we do not emit multiple .weak directives for it.  
       Remove weakrefs to the same target from the pending weakref
       list, for the same reason.  

References targetm.

static void dump_tm_clone_pairs ( )
   Dump the actual pairs to the .tm_clone_table section.  
         The function ipa_tm_create_version() marks the clone as needed if
         the original function was needed.  But we also mark the clone as
         needed if we ever called the clone indirectly through
         TM_GETTMCLONE.  If neither of these are true, we didn't generate
         a clone, and we didn't call it indirectly... no sense keeping it
         in the clone table.  
         This covers the case where we have optimized the original
         function away, and only access the transactional clone.  
static int dump_tm_clone_to_vec ( )
   Helper function for finish_tm_clone_pairs.  Dump a hash table entry
   into a VEC in INFO.  
int elf_record_gcc_switches ( )
   This function provides a possible implementation of the
   TARGET_ASM_RECORD_GCC_SWITCHES target hook for ELF targets.  When triggered
   by -frecord-gcc-switches it creates a new mergeable, string section in the
   assembler output file called TARGET_ASM_RECORD_GCC_SWITCHES_SECTION which
   contains the switches in ASCII format.

   FIXME: This code does not correctly handle double quote characters
   that appear inside strings, (it strips them rather than preserving them).
   FIXME: ASM_OUTPUT_ASCII, as defined in config/elfos.h will not emit NUL
   characters - instead it treats them as sub-string separators.  Since
   we want to emit NUL strings terminators into the object file we have to use
             Distinguish between invocations where name is NULL.  
     The return value is currently ignored by the caller, but must be 0.
     For -fverbose-asm the return value would be the number of characters
     emitted into the assembler file.  
static bool emit_bss ( tree  decl,
const char *  name,
unsigned HOST_WIDE_INT  size,
unsigned HOST_WIDE_INT  rounded 
   A noswitch_section_callback for bss_noswitch_section.  
static bool emit_common ( tree  decl,
const char *  name,
unsigned HOST_WIDE_INT  size,
unsigned HOST_WIDE_INT  rounded 
   A noswitch_section_callback for comm_section.  

References error().

static bool emit_local ( tree  decl,
const char *  name,
unsigned HOST_WIDE_INT  size,
unsigned HOST_WIDE_INT  rounded 
   A noswitch_section_callback for lcomm_section.  

References targetm.

static bool emit_tls_common ( tree  decl,
const char *  name,
unsigned HOST_WIDE_INT  size,
unsigned HOST_WIDE_INT  rounded 
   A noswitch_section_callback for tls_comm_section.  

References error().

void file_end_indicate_exec_stack ( void  )
void file_end_indicate_split_stack ( void  )
   Emit a special section directive to indicate that this object file
   was compiled with -fsplit-stack.  This is used to let the linker
   detect calls between split-stack code and non-split-stack code, so
   that it can modify the split-stack code to allocate a sufficiently
   large stack.  We emit another special section if there are any
   functions in this file which have the no_split_stack attribute, to
   prevent the linker from warning about being unable to convert the
   functions if they call non-split-stack code.  
static tree find_decl ( )
   Fiven an assembly name, find the decl it is associated with.  
void finish_tm_clone_pairs ( void  )
     We need a determenistic order for the .tm_clone_table, otherwise
     we will get bootstrap comparison failures, so dump the hash table
     to a vector, sort it, and dump the vector.  
     Dump the hashtable to a vector.  
     Sort it.  
     Dump it.  

Referenced by emit_debug_global_declarations().

rtx force_const_mem ( )
   Given a constant rtx X, make (or find) a memory constant for its value
   and return a MEM rtx to refer to it in memory.  
     If we're not allowed to drop X into the constant pool, don't.  
     Record that this function has used a constant pool entry.  
     Decide which pool to use.  
     Lookup the value in the hashtable.  
     If the constant was already present, return its memory.  
     Otherwise, create a new descriptor.  
     Align the location counter as required by EXP's data type.  
     Create a string containing the label name, in LABEL.  
     Construct the SYMBOL_REF.  Make sure to mark it as belonging to
     the constants pool.  
     Construct the MEM.  
     If we're dropping a label to the constant pool, make sure we
     don't delete it.  

References output_constant_def_contents().

section* function_section ( )
   Return the section for function DECL.

   If DECL is NULL_TREE, return the text section.  We can be passed
   NULL_TREE under some circumstances by dbxout.c at least.  
     Handle cases where function splitting code decides
     to put function entry point into unlikely executed section
     despite the fact that the function itself is not cold
     (i.e. it is called rarely but contains a hot loop that is
     better to live in hot subsection for the code locality).  
static section* function_section_1 ( )
   Return the section for function DECL.

   If DECL is NULL_TREE, return the text section.  We can be passed
   NULL_TREE under some circumstances by dbxout.c at least.

   If FORCE_COLD is true, return cold function section ignoring
   the frequency info of cgraph_node.  
static struct object_block* get_block_for_decl ( )
   Return the block into which object_block DECL should be placed.  
         The object must be defined in this translation unit.  
         There's no point using object blocks for something that is
         isolated by definition.  
     We can only calculate block offsets if the decl has a known
     constant size.  
     Find out which section should contain DECL.  We cannot put it into
     an object block if it requires a standalone definition.  

References targetm.

static struct object_block* get_block_for_section ( )
   Return the object_block structure for section SECT.  Create a new
   structure if we haven't created one already.  Return null if SECT
   itself is null.  
section* get_cdtor_priority_section ( )
   Return the numbered .ctors.N (if CONSTRUCTOR_P) or .dtors.N (if
   not) section for PRIORITY.  
     ??? This only works reliably with the GNU linker.  
              Invert the numbering so the linker puts us in the proper
              order; constructors are run from right to left, and the
              linker sorts in increasing order.  

References cgraph_get_node(), current_function_decl, and NODE_FREQUENCY_UNLIKELY_EXECUTED.

static section* get_constant_section ( )
   Return the section into which constant EXP should be placed.  
static HOST_WIDE_INT get_constant_size ( )
static section* get_elf_initfini_array_priority_section ( int  priority,
bool  constructor_p 
section* get_named_section ( )
   Return a section with a particular name and with whatever SECTION_*
   flags section_type_flags deems appropriate.  The name of the section
   is taken from NAME if nonnull, otherwise it is taken from DECL's
   DECL_SECTION_NAME.  DECL is the decl associated with the section
   (see the section comment for details) and RELOC is as for

References floor_log2(), and switch_to_section().

section* get_named_text_section ( tree  decl,
const char *  text_section_name,
const char *  named_section_suffix 
   is NULL.

   When DECL_SECTION_NAME is non-NULL and it is implicit section and
   NAMED_SECTION_SUFFIX is non-NULL, then produce section called
   concatenate the name with NAMED_SECTION_SUFFIX.
   Otherwise produce "TEXT_SECTION_NAME.IMPLICIT_NAME".  
             Do not try to split gnu_linkonce functions.  This gets somewhat

References get_named_text_section(), NODE_FREQUENCY_HOT, and NODE_FREQUENCY_UNLIKELY_EXECUTED.

Referenced by get_named_text_section().

static section* get_noswitch_section ( )
   Return a SECTION_NOSWITCH section with the given fields.  
rtx get_pool_constant ( )
   Given a constant pool SYMBOL_REF, return the corresponding constant.  
rtx get_pool_constant_mark ( )
   Given a constant pool SYMBOL_REF, return the corresponding constant
   and whether it has been output or not.  
enum machine_mode get_pool_mode ( )
   Similar, return the mode.  
int get_pool_size ( void  )
   Return the size of the constant pool.  
section* get_section ( )
   Return the named section structure associated with NAME.  Create
   a new section with the given fields if no such structure exists.  
             It is fine if one of the section flags is
             SECTION_WRITE | SECTION_RELRO and the other has none of these
             flags (i.e. read-only) in named sections and either the
             section hasn't been declared yet or has been declared as writable.
             In that case just make sure the resulting flags are
             SECTION_WRITE | SECTION_RELRO, ie. writable only because of
             Sanity check user variables for flag changes.  
             Make sure we don't error about one section multiple times.  

References section::common, section_common::flags, and object_block::sect.

rtx get_section_anchor ( struct object_block block,
HOST_WIDE_INT  offset,
enum tls_model  model 
   Return the anchor that should be used to address byte offset OFFSET
   from the first object in BLOCK.  MODEL is the TLS model used
   to access it.  
     Work out the anchor's offset.  Use an offset of 0 for the first
     anchor so that we don't pessimize the case where we take the address
     of a variable at the beginning of the block.  This is particularly
     useful when a block has only one variable assigned to it.

     We try to place anchors RANGE bytes apart, so there can then be
     anchors at +/-RANGE, +/-2 * RANGE, and so on, up to the limits of
     a ptr_mode offset.  With some target settings, the lowest such
     anchor might be out of range for the lowest ptr_mode offset;
     likewise the highest anchor for the highest offset.  Use anchors
     at the extreme ends of the ptr_mode range in such cases.

     All arithmetic uses unsigned integers in order to avoid
     signed overflow.  
     Do a binary search to see if there's already an anchor we can use.
     Set BEGIN to the new anchor's index if not.  
     Create a new anchor with a unique label.  
     Insert it at index BEGIN.  
tree get_tm_clone_pair ( )
section* get_unnamed_section ( unsigned int  flags,
void(*)(const void *)  callback,
const void *  data 
   Return a new unnamed section with the given fields.  
static unsigned int get_variable_align ( )
   Return DECL_ALIGN (decl), possibly increased for optimization purposes
   beyond what align_variable returned.  
     For user aligned vars or static vars align_variable already did
     For decls that bind to the current definition, align_variable
     did also everything, except for not assuming ABI required alignment
     of TLS variables.  For other vars, increase the alignment here
     as an optimization.  
         On some machines, it is good to increase alignment sometimes.  
         Don't increase alignment too much for TLS variables - TLS space
         is too precious.  
             Don't increase alignment too much for TLS variables - TLS space
             is too precious.  

References targetm.

Referenced by assemble_string().

section* get_variable_section ( )
   Return the section into which the given VAR_DECL or CONST_DECL
   should be placed.  PREFER_NOSWITCH_P is true if a noswitch
   section should be used wherever possible.  
         If the decl has been given an explicit section name, or it resides
         in a non-generic address space, then it isn't common, and shouldn't
         be handled as such.  
static void globalize_decl ( tree  )

Referenced by decide_function_section().

static void globalize_decl ( )
   Emit the assembly bits to indicate that DECL is globally visible.  
         Remove this function from the pending weak list so that
         we do not emit multiple .weak directives for it.  
         Remove weakrefs to the same target from the pending weakref
         list, for the same reason.  
static hashval_t hash_section ( )
   Return a hash value for section SECT.  

References unnamed_section::common, section_common::flags, object_block::sect, and section::unnamed.

bool have_global_bss_p ( void  )
   Return true if the target supports some form of global BSS,
   either through bss_noswitch_section, or by selecting a BSS
static section* hot_function_section ( )
   Return the hot section for function DECL.  Return text_section for
   null DECLs.  

References get_named_section(), and targetm.

Referenced by default_function_section().

static bool incorporeal_function_p ( tree  )
static bool incorporeal_function_p ( )
   True if DECL is a function decl for which no out-of-line copy exists.
   It is assumed that DECL's assembler name has been set.  
         Atomic or sync builtins which have survived this far will be
         resolved externally and therefore are not incorporeal.  
void init_varasm_once ( void  )
   In varasm.c 
void init_varasm_status ( void  )
   Initialize constant pool hashing for a new function.  

Referenced by blocks_nreverse().

bool initializer_constant_valid_for_bitfield_p ( )
   Return true if VALUE is a valid constant-valued expression
   for use in initializing a static bit-field; one that can be
   an element of a "constant" initializer.  
     For bitfields we support integer constants or possibly nested aggregates
     of such.  
tree initializer_constant_valid_p ( )
   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.  
static tree initializer_constant_valid_p_1 ( tree  value,
tree  endtype,
tree cache 
static tree initializer_constant_valid_p_1 ( )
   Helper function of initializer_constant_valid_p.
   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.

   Use CACHE (pointer to 2 tree values) for caching if non-NULL.  
             For a non-absolute relocation, there is no single
             variable that can be "the variable that determines the
               "&(*a).f" is like unto pointer arithmetic.  If "a" turns out
               to be a constant, this is old-skool offsetof-like nonsense.  
               Taking the address of a nested function involves a trampoline,
               unless we don't need or want one.  
               "&{...}" requires a temporary to hold the constructed
           Allow view-conversions from aggregate to non-aggregate type only
           if the bit pattern is fully preserved afterwards; otherwise, the
           RTL expander won't be able to apply a subsequent transformation
           to the underlying constructor.  
           Allow all other kinds of view-conversion.  
           Allow conversions between pointer types, floating-point
           types, and offset types.  
           Allow length-preserving conversions between integer types.  
           Allow conversions between other integer types only if
           explicit value.  
           Allow (int) &foo provided int is as wide as a pointer.  
           Likewise conversions from int to pointers, but also allow
           conversions from 0.  
           Allow conversions to struct or union types if the value
           inside is okay.  
         Any valid floating-point constants will have been folded by now;
         with -frounding-math we hit this with addition of two constants.  
             If either term is absolute, use the other term's relocation.  
             Support narrowing pointer differences.  
         Support narrowing pointer differences.  
             Win if second argument is absolute.  
             Win if both arguments have the same relocation.
             Then the value is absolute.  
             Since GCC guarantees that string constants are unique in the
             generated code, a subtraction between two copies of the same
             constant string is absolute.  
             Support narrowing differences.  
           Support narrowing differences.  

References asm_out_file, assemble_integer(), assemble_real(), assemble_string(), assemble_zeros(), build_int_cst_wide(), error(), expand_expr(), EXPAND_INITIALIZER, int_size_in_bytes(), min_align(), output_constant(), output_constructor(), targetm, tree_low_cst(), and vec_safe_is_empty().

const char* integer_asm_op ( )
   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.  
rtx lookup_constant_def ( )
   Look up EXP in the table of constant descriptors.  Return the rtl
   if it has been emitted, else null.  
rtx make_debug_expr_from_rtl ( )
   Create a DEBUG_EXPR_DECL / DEBUG_EXPR pair from RTL expression
void make_decl_one_only ( )
   Set up DECL as a public symbol that can be defined in multiple
   translation units without generating a linker error.  

References categorize_decl_for_section(), and decl_readonly_section_1().

void make_decl_rtl ( )
   Create the DECL_RTL for a VAR_DECL or FUNCTION_DECL.  DECL should
   have static storage duration.  In other words, it should not be an
   automatic variable, including PARM_DECLs.

   There is, however, one exception: this function handles variables
   explicitly placed in a particular register by the user.

   This is never called for PARM_DECL nodes.  
     Check that we are not being given an automatic variable.  
     A weak alias has TREE_PUBLIC set but not the other bits.  
     And that we were not given a type or a label.  
     For a duplicate declaration, we can be called twice on the
     same DECL node.  Don't discard the RTL already made.  
         If the old RTL had the wrong mode, fix the mode.  
         ??? Another way to do this would be to maintain a hashed
         table of such critters.  Instead of adding stuff to a DECL
         to give certain attributes to it, we could use an external
         hash map from DECL to set of attributes.  
         Let the target reassign the RTL if it wants.
         This is necessary, for example, when one machine specific
         decl attribute overrides another.  
         If the symbol has a SYMBOL_REF_BLOCK field, update it based
         on the new decl information.  
     If this variable belongs to the global constant pool, retrieve the
     pre-computed RTL or recompute it in LTO mode.  
         First detect errors in declaring global registers.  
         Now handle properly declared static register variables.  
             If the user specified one of the eliminables registers here,
             e.g., FRAME_POINTER_REGNUM, we don't want to get this variable
             confused with that register and be eliminated.  This usage is
             somewhat suspect...  
                 Make this register global, so not usable for anything
             As a register variable, it has no section.  
     Now handle ordinary static variables and functions (in memory).
     Also handle vars declared register invalidly.  
     Specifying a section attribute on a variable forces it into a
     non-.bss section, and thus it cannot be common.  
     FIXME: In general this code should not be necessary because
     visibility pass is doing the same work.  But notice_global_symbol
     is called early and it needs to make DECL_RTL to get the name.
     we take care of recomputing the DECL_RTL after visibility is changed.  
     Variables can't be both common and weak.  
     Optionally set flags or add text to the name to record information
     such as that it is a function name.
     If the name is changed, the macro ASM_OUTPUT_LABELREF
     will have to know how to strip this information.  
rtx make_decl_rtl_for_debug ( )
   Like make_decl_rtl, but inhibit creation of new alias sets when
   calling make_decl_rtl.  Also, reset DECL_RTL before returning the
     Kludge alert!  Somewhere down the call chain, make_decl_rtl will
     call new_alias_set.  If running with -fcompare-debug, sometimes
     we do not want to create alias sets that will throw the alias
     numbers off in the comparison dumps.  So... clearing
     flag_strict_aliasing will keep new_alias_set() from creating a
     new set.  
     Reset DECL_RTL back, as various parts of the compiler expects
     DECL_RTL set meaning it is actually going to be output.  

References first_global_object_name, and weak_global_object_name.

static int mark_constant ( )
   Given a SYMBOL_REF CURRENT_RTX, mark it and all constants it refers
   to as used.  Emit referenced deferred strings.  This function can
   be used with for_each_rtx to mark all SYMBOL_REFs in an rtx.  
static void mark_constant_pool ( )
   Look through the instructions for this function, and mark all the
   entries in POOL which are actually being used.  Emit deferred constants
   which have indeed been used.  

References initializer_constant_valid_p_1().

static void mark_constants ( )
   Look through appropriate parts of INSN, marking all entries in the
   constant pool which are actually being used.  Entries that are only
   referenced by other constants are also marked as used.  Emit
   deferred strings that are used.  
     Insns may appear inside a SEQUENCE.  Only check the patterns of
     insns, not any notes that may be attached.  We don't want to mark
     a constant just because it happens to appear in a REG_EQUIV note.  
void mark_decl_referenced ( )
   Set the symbol_referenced flag for DECL and notify callgraph.  
         Extern inline functions don't become needed when referenced.
         If we know a method will be emitted in other TU and no new
         functions can be marked reachable, just use the external
         C++ frontend use mark_decl_references to force COMDAT variables
         to be output that might appear dead otherwise.  
     else do nothing - we can get various sorts of CST nodes here,
     which do not need to be marked.  

References asm_int_op::di, asm_int_op::hi, asm_int_op::si, targetm, and asm_int_op::ti.

void mark_referenced ( )
   Set the symbol_referenced flag for ID.  

References targetm.

static void mark_weak ( tree  )
static void mark_weak ( )
   Mark DECL as weak.  
int maybe_assemble_visibility ( )
   A helper function to call assemble_visibility when needed for a decl.  


static void maybe_output_constant_def_contents ( struct constant_descriptor_tree desc,
int  defer 
   Subroutine of output_constant_def: Decide whether or not we need to
   output the constant DESC now, and if so, do it.  
       Already output; don't do it again.  
     We can always defer constants as long as the context allows
     doing so.  
         Increment n_deferred_constants if it exists.  It needs to be at
         least as large as the number of constants actually referred to
         by the function.  If it's too small we'll stop looking too early
         and fail to emit constants; if it's too large we'll only look
         through the entire function when we could have stopped earlier.  
void merge_weak ( )
   Merge weak status between NEWDECL and OLDDECL.  
             We put the NEWDECL on the weak_decls list at some point
             and OLDDECL as well.  Keep just OLDDECL on the list.  
         NEWDECL is weak, but OLDDECL is not.  
         If we already output the OLDDECL, we're in trouble; we can't
         go back and make it weak.  This should never happen in
         unit-at-a-time compilation.  
         If we've already generated rtl referencing OLDDECL, we may
         have done so in a way that will not function properly with
         a weak symbol.  Again in unit-at-a-time this should be
             We put the NEWDECL on the weak_decls list at some point.
             Replace it with the OLDDECL.  
             We may not find the entry on the list.  If NEWDECL is a
             weak alias, then we will have already called
             globalize_decl to remove the entry; in that case, we do
             not need to do anything.  
         Make the OLDDECL weak; it's OLDDECL that we'll be keeping.  
       OLDDECL was weak, but NEWDECL was not explicitly marked as
       weak.  Just update NEWDECL to indicate that it's weak too.  

References tree_map_hash().

section* mergeable_constant_section ( enum machine_mode  mode,
unsigned HOST_WIDE_INT  align,
unsigned int  flags 
   Return the section to use for constant merging.  

References strip_reg_name(), and strlen().

static section* mergeable_string_section ( tree  decl,
unsigned HOST_WIDE_INT  align,
unsigned int  flags 
   Return the section to use for string merging.  
             Check for embedded NUL characters.  

References get_section(), readonly_data_section, strlen(), and targetm.

static unsigned min_align ( unsigned  ,
static unsigned min_align ( )
   A and B are either alignments or offsets.  Return the minimum alignment
   that may be assumed after adding the two together.  
static tree narrowing_initializer_constant_valid_p ( )
   A subroutine of initializer_constant_valid_p.  VALUE is a MINUS_EXPR,
   PLUS_EXPR or POINTER_PLUS_EXPR.  This looks for cases of VALUE
   which are valid when ENDTYPE is an integer of any size; in
   particular, this does not accept a pointer minus a constant.  This
   returns null_pointer_node if the VALUE is an absolute constant
   which can be used to initialize a static variable.  Otherwise it
   returns NULL.  
     Like STRIP_NOPS except allow the operand mode to widen.  This
     works around a feature of fold that simplifies (int)(p1 - p2) to
     ((int)p1 - (int)p2) under the theory that the narrower operation
     is cheaper.  
     Both initializers must be known.  
         Support differences between labels.  

Referenced by output_addressed_constants().

void notice_global_symbol ( )
   DECL is an object (either VAR_DECL or FUNCTION_DECL) which is going
   to be output to assembler.
   Set first_global_object_name and weak_global_object_name as appropriate.  
     We win when global object is found, but it is useful to know about weak
     symbol as well so we can produce nicer unique names.  
static int object_block_entry_eq ( )
   Helper routines for maintaining object_block_htab.  
static hashval_t object_block_entry_hash ( )
static void output_addressed_constants ( tree  )
static void output_addressed_constants ( )
   Find all the constants whose addresses are referenced inside of EXP,
   and make sure assembler code with a label has been output for each one.
   Indicate whether an ADDR_EXPR has been encountered.  
         Go inside any operations that get_inner_reference can handle and see
         if what's inside is a constant: no need to do anything here for
         addresses of variables or functions.  
         If we have an initialized CONST_DECL, retrieve the initializer.  
         Fall through.  

References initializer_constant_valid_p_1(), and narrowing_initializer_constant_valid_p().

void output_constant ( )
   Output assembler code for constant EXP, 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.

   SIZE is important for structure constructors,
   since trailing members may have been omitted from the constructor.
   It is also important for initialization of arrays from string constants
   since the full length of the string constant might not be wanted.
   It is also needed for initialization of unions, where the initializer's
   type is just one member, and that may not be as long as the union.

   There a case in which we would fail to output exactly SIZE bytes:
   for a structure constructor that wants to produce more than SIZE bytes.
   But such constructors will never be generated for any possible input.

   ALIGN is the alignment of the data in bits.  
     See if we're trying to initialize a pointer in a non-default mode
     to the address of some declaration somewhere.  If the target says
     the mode is valid for pointers, assume the target has a way of
     resolving it.  
         Peel off any intermediate conversions-to-pointer for valid
         pointer modes.  
         If what we're left with is the address of something, we can
         convert the address to the final type and output it that
         Likewise for constant ints.  
     Eliminate any conversions since we'll be outputting the underlying
         Make sure eliminating the conversion is really a no-op, except with
         VIEW_CONVERT_EXPRs to allow for wild Ada unchecked conversions and
         union types to allow for Ada unchecked unions.  
           Keep the conversion. 
     Allow a constructor with no elements for any data type.
     This means to fill the space with zeros.  
     Now output the underlying data.  If we've handling the padding, return.
     Otherwise, break and ensure SIZE is the size written.  

References assemble_integer(), assemble_zeros(), oc_outer_state::bit_offset, oc_outer_state::byte, oc_local_state::byte, oc_local_state::byte_buffer_in_use, error(), oc_local_state::field, HOST_BITS_PER_WIDE_INT, oc_local_state::index, int_bit_position(), oc_local_state::last_relative_index, oc_local_state::min_index, output_constructor(), shift, oc_local_state::total_bytes, tree_low_cst(), oc_local_state::type, and oc_local_state::val.

rtx output_constant_def ( )
   Return an rtx representing a reference to constant data in memory
   for the constant expression EXP.

   If assembler code for such a constant has already been output,
   return an rtx to refer to it.
   Otherwise, output such a constant in memory
   and generate an rtx for it.

   If DEFER is nonzero, this constant can be deferred and output only
   if referenced in the function after all optimizations.

   `const_desc_table' records which constants already have label strings.  
     Look up EXP in the table of constant descriptors.  If we didn't find
     it, create a new one.  

References shift.

static void output_constant_def_contents ( rtx  )

Referenced by force_const_mem().

static void output_constant_def_contents ( )
   We must output the constant data referred to by SYMBOL; do so.  
     Make sure any other constants whose addresses appear in EXP
     are assigned label numbers.  
     We are no longer deferring this constant.  
     If the constant is part of an object block, make sure that the
     decl has been positioned within its block, but do not write out
     its definition yet.  output_object_blocks will do that later.  

References simplify_rtx().

static void output_constant_pool ( const char *  fnname,
tree  fndecl 
   Mark all constants that are used in the current function, then write
   out the function's private constant pool.  
     It is possible for gcc to call force_const_mem and then to later
     discard the instructions which refer to the constant.  In such a
     case we do not need to output the constant.  

References staticp().

static void output_constant_pool_1 ( struct constant_descriptor_rtx desc,
unsigned int  align 
   Worker function for output_constant_pool.  Emit constant DESC,
   giving it ALIGN bits of alignment.  
     See if X is a LABEL_REF (or a CONST referring to a LABEL_REF)
     whose CODE_LABEL has been deleted.  This can occur if a jump table
     is eliminated by optimization.  If so, write a constant of zero
     instead.  Note that this can also happen by turning the
     CODE_LABEL into a NOTE.  
     ??? This seems completely and utterly wrong.  Certainly it's
     not true for NOTE_INSN_DELETED_LABEL, but I disbelieve proper
     functioning even with INSN_DELETED_P and friends.  
     Output the label.  
     Output the data.  
     Make sure all constants in SECTION_MERGE and not SECTION_STRINGS
     sections have proper size.  
static void output_constant_pool_2 ( )
   Worker function for output_constant_pool_1.  Emit assembly for X
   in MODE with known alignment ALIGN.  
static void output_constant_pool_contents ( )
   Write all the constants in POOL.  
           If the constant is part of an object_block, make sure that
           the constant has been positioned within its block, but do not
           write out its definition yet.  output_object_blocks will do
           that later.  
static unsigned HOST_WIDE_INT output_constructor ( tree  exp,
unsigned HOST_WIDE_INT  size,
unsigned int  align,
oc_outer_state outer 
   Subroutine of output_constant, used for CONSTRUCTORs (aggregate constants).
   Generate at least SIZE bytes, padding if necessary.  OUTER designates the
   caller output state of relevance in recursive invocations.  
     Setup our local state to communicate with helpers.  
     As CE goes through the elements of the constant, FIELD goes through the
     structure fields if the constant is a structure.  If the constant is a
     union, we override this by getting the field from the TREE_LIST element.
     But the constant could also be an array.  Then FIELD is zero.

     There is always a maximum of one element in the chain LINK for unions
     (even if the initializer in a source program incorrectly contains
     more one).  
         The element in a union constructor specifies the proper field
         or index.  
         Eliminate the marker that makes a cast not be an lvalue.  
         Output the current element, using the appropriate helper ...  
         For an array slice not part of an outer bitfield.  
         For a field that is neither a true bitfield nor part of an outer one,
         known to be at least byte aligned and multiple-of-bytes long.  
         For a true bitfield or part of an outer one.  Only INTEGER_CSTs are
         supported for scalar fields, so we may need to convert first.  
     If we are not at toplevel, save the pending data for our caller.
     Otherwise output the pending data and padding zeros as needed. 

Referenced by initializer_constant_valid_p_1(), and output_constant().

static void output_constructor_array_range ( )
   Helper for output_constructor.  From the current LOCAL state, output a
   RANGE_EXPR element.  
         Output the element's initial value.  
         Count its size.  
static void output_constructor_bitfield ( )
   Helper for output_constructor.  From the LOCAL state, output an element
   that is a true bitfield or part of an outer one.  BIT_OFFSET is the offset
   from the start of a possibly ongoing outer byte buffer.  
     Bit size of this element.  
     Relative index of this element if this is an array component.  
     Bit position of this element from the start of the containing
     Bit position of this element from the start of a possibly ongoing
     outer byte buffer.  
     From the start of a possibly ongoing outer byte buffer, offsets to
     the first bit of this element and to the first bit past the end of
     this element.  
     If this field does not start in this (or next) byte, skip some bytes.  
         Output remnant of any bit field in previous bytes.  
         If still not at proper byte, advance to there.  
     Set up the buffer if necessary.  
     If this is nested constructor, recurse passing the bit offset and the
     pending data, then retrieve the new pending data afterwards.  
     Otherwise, we must split the element into pieces that fall within
     separate bytes, and combine each byte with previous or following
         Advance from byte to byte within this element when necessary.  
         Number of bits we can process at once (all part of the same byte).  
             On big-endian machine, take the most significant bits
             first (of the bits that are significant)
             and put them into bytes from the most significant end.  
             Don't try to take a bunch of bits that cross
             the word boundary in the INTEGER_CST. We can
             only select bits from the LOW or HIGH part
             not from both.  
             Now get the bits from the appropriate constant word.  
             Get the result. This works only when:
             1 <= this_time <= HOST_BITS_PER_WIDE_INT.  
             On little-endian machines,
             take first the least significant bits of the value
             and pack them starting at the least significant
             bits of the bytes.  
             Don't try to take a bunch of bits that cross
             the word boundary in the INTEGER_CST. We can
             only select bits from the LOW or HIGH part
             not from both.  
             Now get the bits from the appropriate constant word.  
             Get the result. This works only when:
             1 <= this_time <= HOST_BITS_PER_WIDE_INT.  

References error(), get_identifier(), lookup_attribute(), mark_weak(), and warning().

static void output_constructor_regular_field ( )
   Helper for output_constructor.  From the current LOCAL state, output a
   field element that is not true bitfield or part of an outer one.  
     Field size and position.  Since this structure is static, we know the
     positions are constant.  
         Perform the index calculation in modulo arithmetic but
         sign-extend the result because Ada has negative DECL_FIELD_OFFSETs
         but we are using an unsigned sizetype.  
     Output any buffered-up bit-fields preceding this element.  
     Advance to offset of this element.
     Note no alignment needed in an array, since that is guaranteed
     if each element has the proper size.  
     Find the alignment of this element.  
     Determine size this element should occupy.  
         If this is an array with an unspecified upper bound,
         the initializer determines the size.  
         ??? This ought to only checked if DECL_SIZE_UNIT is NULL,
         but we cannot do this until the deprecated support for
         initializing zero-length array members is removed.  
             Given a non-empty initialization, this field had
             better be last.  
     Output the element's initial value.  
     Count its size.  

References assemble_integer(), assemble_zeros(), oc_local_state::byte, oc_local_state::byte_buffer_in_use, oc_local_state::size, and oc_local_state::total_bytes.

void output_file_directive ( )
   Output a file name in the form wanted by System V.  
     NA gets INPUT_NAME sans directory names.  
static void output_object_block ( )
   Output the objects in BLOCK.  
     Switch to the section and make sure that the first byte is
     suitably aligned.  
     Define the values of all anchors relative to the current section
     Output the objects themselves.  
         Move to the object's offset, padding with zeros if necessary.  
static int output_object_block_htab ( )
   A htab_traverse callback used to call output_object_block for
   each member of object_block_htab.  
void output_object_blocks ( void  )
   Output the definitions of all object_blocks.  

Referenced by emit_debug_global_declarations().

void output_section_asm_op ( )
   Output DIRECTIVE (a C string) followed by a newline.  This is used as
   a get_unnamed_section callback.  
void output_shared_constant_pool ( void  )
   Write the contents of the shared constant pool.  

Referenced by emit_debug_global_declarations().

void place_block_symbol ( )
   If block symbol SYMBOL has not yet been assigned an offset, place
   it at the end of its block.  
     Work out the symbol's size and alignment.  
     Calculate the object's offset from the start of the block.  
     Record the block's new alignment and size.  
void process_pending_assemble_externals ( void  )
void record_tm_clone_pair ( )

References asm_out_file.

static bool resolution_local_p ( )
   Return true when RESOLUTION indicate that symbol will be bound locally
   within current executable or DSO.  

Referenced by default_select_section().

static bool resolution_to_local_definition_p ( )
   Return true when RESOLUTION indicate that symbol will be bound to the
   definition provided by current .o file.  

References offset.

Referenced by default_select_section().

void resolve_unique_section ( tree  decl,
int  reloc,
int  flag_function_or_data_sections 
   If required, set DECL_SECTION_NAME to a unique name.  

References get_named_section(), and text_section.

static int section_entry_eq ( )
   Helper routines for maintaining section_htab.  
static hashval_t section_entry_hash ( )
void set_user_assembler_name ( )
   The user has asked for a DECL to have a particular name.  Set (or
   change) it in such a way that we don't prefix an underscore to
rtx simplify_subtraction ( )
   Given a MINUS expression, simplify it if both sides
   include the same symbol.  
static const char* strip_reg_name ( const char *  )
static const char* strip_reg_name ( )
   Given NAME, a putative register name, discard any customary prefixes.  

References table.

int supports_one_only ( void  )
   Returns 1 if the target configuration supports defining public symbols
   so that one of them will be chosen at link time instead of generating a
   multiply-defined symbol error, whether through the use of weak symbols or
   a target-specific mechanism for having duplicates discarded.  
void switch_to_section ( )
   Emit assembly code to switch to section NEW_SECTION.  Do nothing if
   the current section is NEW_SECTION.  
static int tm_alias_pair_cmp ( )
   Helper comparison function for qsorting by the DECL_UID stored in
tree tree_output_constant_def ( )
   Return a tree representing a reference to constant data in memory
   for the constant expression EXP.

   This is the counterpart of output_constant_def at the Tree level.  
     Look up EXP in the table of constant descriptors.  If we didn't find
     it, create a new one.  

References targetm.

static tree ultimate_transparent_alias_target ( )
   Follow the IDENTIFIER_TRANSPARENT_ALIAS chain starting at *ALIAS
   until we find an identifier that is not itself a transparent alias.
   Modify the alias passed to it by reference (and all aliases on the
   way to the ultimate target), such that they do not have to be
   followed again, and return the ultimate target of the alias

References assemble_integer_with_op(), and integer_asm_op().

Referenced by assemble_external_real().

section* unlikely_text_section ( void  )
   Tell assembler to switch to unlikely-to-be-executed text section.  

References get_section(), memcpy(), and strlen().

Referenced by default_ctor_section_asm_out_constructor().

bool unlikely_text_section_p ( )
   When called within a function context, return true if the function
   has been assigned a cold text section and if SECT is that section.
   When called outside a function context, return true if SECT is the
   default cold section.  
static bool use_blocks_for_decl_p ( )
   Return true if it is possible to put DECL in an object_block.  
     Only data DECLs can be placed into object blocks.  
     Detect decls created by dw2_force_const_mem.  Such decls are
     special because DECL_INITIAL doesn't specify the decl's true value.
     dw2_output_indirect_constants will instead call assemble_variable
     with dont_output_data set to 1 and then print the contents itself.  
     If this decl is an alias, then we don't want to emit a

References error().

static bool use_object_blocks_p ( )
   Return true if the current compilation mode benefits from having
   objects grouped into blocks.  

References object_block::size.

void weak_finish ( void  )
   Emit any pending weak declarations.  
           Remove alias_decl from the weak list, but leave entries for
           the target alone.  
             Use ASM_WEAKEN_LABEL only if ASM_WEAKEN_DECL is not
             defined, otherwise we and weak_finish_1 would use
             different macros.  
           Remove the alias and the target from the pending weak list
           so that we do not emit any .weak directives for the former,
           nor multiple .weak directives for the latter.  
           Remove other weakrefs to the same target, to speed things up.  

Referenced by emit_debug_global_declarations().

static void weak_finish_1 ( )

Variable Documentation

vec<alias_pair, va_gc>* alias_pairs

Referenced by handle_alias_pairs().

int anchor_labelno
   The next number to use for internal anchor labels.  
section* bss_noswitch_section
   A SECTION_NOSWITCH section used for declaring global BSS variables.
   May be null.  
section* bss_section
section* comm_section
alias_set_type const_alias_set
   We give all constants their own alias set.  Perhaps redundant with
   MEM_READONLY_P, but pre-dates it.  
htab_t const_desc_htab

Referenced by get_constant_size().

int const_labelno
   Number for making the label on the next
   constant that is stored in memory.  
section* ctors_section
section* data_section

Referenced by final_start_function().

section* dtors_section
section* eh_frame_section
   The section that holds the DWARF2 frame unwind information, when known.
   The section is set either by the target's init_sections hook or by the
   first call to switch_to_eh_frame_section.  
section* elf_fini_array_section
section* elf_init_array_section
section* exception_section
   The section that holds the main exception table, when known.  The section
   is set either by the target's init_sections hook or by the first call to
bool first_function_block_is_cold
   The following global variable indicates if the first basic block
   in a function belongs to the cold partition or not.  

Referenced by default_ctor_section_asm_out_constructor().

const char* first_global_object_name

Output variables, constants and external declarations, for GNU compiler. Copyright (C) 1987-2013 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 3, 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 COPYING3. If not see http://www.gnu.org/licenses/.

   This file handles generation of all the assembler code
   *except* the instructions of a function.
   This includes declarations of variables and their initial values.

   We also output the assembler code for constants stored in memory
   and are responsible for combining constants with the same value.  
   The (assembler) name of the first globally-visible object output.  
bool in_cold_section_p
   True if code for the current function is currently being directed
   at the cold section.  
section* in_section
   asm_out_file's current section.  This is NULL if no section has yet
   been selected or if we lose track of what the current section is.  
rtx initial_trampoline
   Assemble the static constant template for function entry trampolines.
   This is done at most once per compilation.
   Returns an RTX for the address of the template.  
tree last_assemble_variable_decl
   The last decl for which assemble_variable was called,
   If the last call to assemble_variable didn't do that,
   this holds 0.  
section* lcomm_section
htab_t object_block_htab
   A table of object_blocks, indexed by section.  
tree pending_assemble_externals
   We delay assemble_external processing until
   the compilation unit is finalized.  This is the best we can do for
   right now (i.e. stage 3 of GCC 4.0) - the right thing is to delay
   it all the way to final.  See PR 17982 for further discussion.  
bool pending_assemble_externals_processed
   Some targets delay some output to final using TARGET_ASM_FILE_END.
   As a result, assemble_external can be called after the list of externals
   is processed and the pointer set destroyed.  
struct pointer_set_t* pending_assemble_externals_set
   Avoid O(external_decls**2) lookups in the pending_assemble_externals
   TREE_LIST in assemble_external.  
section* readonly_data_section
bool saw_no_split_stack
   Whether we saw any functions with no_split_stack.  
section* sbss_section
section* sdata_section
htab_t section_htab
   Hash table of named sections.  
struct rtx_constant_pool* shared_constant_pool
   A pool of constants that can be shared between functions.  
int size_directive_output
   Carry information from ASM_DECLARE_OBJECT_NAME
section* text_section
   Well-known sections, each one associated with some sort of *_ASM_OP.  

Referenced by resolve_unique_section().

section* tls_comm_section
   Various forms of common section.  All are guaranteed to be nonnull.  
htab_t tm_clone_hash
   Record and output a table of translations from original function
   to its transaction aware clone.  Note that tm_pure functions are
   considered to be their own clone.  
int trampolines_created
   This is a generic routine suitable for use as TARGET_ASM_FILE_END
   which emits a special section directive used to indicate whether or
   not this object file needs an executable stack.  This is primarily
   a GNU extension to ELF but could be used on other targets.  
section* unnamed_sections
   A linked list of all the unnamed sections.  
tree weak_decls
   This TREE_LIST contains any weak symbol declarations waiting
   to be emitted.  
const char* weak_global_object_name
tree weakref_targets
   This TREE_LIST contains weakref targets.