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-rw-r--r--gcc-4.2.1-5666.3/gcc/varasm.c6372
1 files changed, 0 insertions, 6372 deletions
diff --git a/gcc-4.2.1-5666.3/gcc/varasm.c b/gcc-4.2.1-5666.3/gcc/varasm.c
deleted file mode 100644
index 5a139ef65..000000000
--- a/gcc-4.2.1-5666.3/gcc/varasm.c
+++ /dev/null
@@ -1,6372 +0,0 @@
-/* Output variables, constants and external declarations, for GNU compiler.
- Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997,
- 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
- Free Software Foundation, Inc.
-
-This file is part of GCC.
-
-GCC is free software; you can redistribute it and/or modify it under
-the terms of the GNU General Public License as published by the Free
-Software Foundation; either version 2, or (at your option) any later
-version.
-
-GCC is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY; without even the implied warranty of MERCHANTABILITY or
-FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-for more details.
-
-You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301, USA. */
-
-
-/* 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. */
-
-#include "config.h"
-#include "system.h"
-#include "coretypes.h"
-#include "tm.h"
-#include "rtl.h"
-#include "tree.h"
-#include "flags.h"
-#include "function.h"
-#include "expr.h"
-#include "hard-reg-set.h"
-#include "regs.h"
-#include "real.h"
-#include "output.h"
-#include "toplev.h"
-#include "hashtab.h"
-#include "c-pragma.h"
-#include "ggc.h"
-#include "langhooks.h"
-#include "tm_p.h"
-#include "debug.h"
-#include "target.h"
-#include "tree-mudflap.h"
-#include "cgraph.h"
-#include "cfglayout.h"
-#include "basic-block.h"
-
-#ifdef XCOFF_DEBUGGING_INFO
-#include "xcoffout.h" /* Needed for external data
- declarations for e.g. AIX 4.x. */
-#endif
-
-/* The (assembler) name of the first globally-visible object output. */
-extern GTY(()) const char *first_global_object_name;
-extern GTY(()) const char *weak_global_object_name;
-
-const char *first_global_object_name;
-const char *weak_global_object_name;
-
-struct addr_const;
-struct constant_descriptor_rtx;
-struct rtx_constant_pool;
-
-struct varasm_status GTY(())
-{
- /* If we're using a per-function constant pool, this is it. */
- struct rtx_constant_pool *pool;
-
- /* Number of tree-constants deferred during the expansion of this
- function. */
- unsigned int deferred_constants;
-};
-
-#define n_deferred_constants (cfun->varasm->deferred_constants)
-
-/* Number for making the label on the next
- constant that is stored in memory. */
-
-static GTY(()) int const_labelno;
-
-/* Carry information from ASM_DECLARE_OBJECT_NAME
- to ASM_FINISH_DECLARE_OBJECT. */
-
-int size_directive_output;
-
-/* The last decl for which assemble_variable was called,
- if it did ASM_DECLARE_OBJECT_NAME.
- If the last call to assemble_variable didn't do that,
- this holds 0. */
-
-tree last_assemble_variable_decl;
-
-/* The following global variable indicates if the first basic block
- in a function belongs to the cold partition or not. */
-
-bool first_function_block_is_cold;
-
-/* We give all constants their own alias set. Perhaps redundant with
- MEM_READONLY_P, but pre-dates it. */
-
-static HOST_WIDE_INT const_alias_set;
-
-static const char *strip_reg_name (const char *);
-static int contains_pointers_p (tree);
-#ifdef ASM_OUTPUT_EXTERNAL
-static bool incorporeal_function_p (tree);
-#endif
-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 output_constructor (tree, unsigned HOST_WIDE_INT, unsigned int);
-static void globalize_decl (tree);
-static void maybe_assemble_visibility (tree);
-#ifdef BSS_SECTION_ASM_OP
-#ifdef ASM_OUTPUT_BSS
-static void asm_output_bss (FILE *, tree, const char *,
- unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT);
-#endif
-#ifdef ASM_OUTPUT_ALIGNED_BSS
-static void asm_output_aligned_bss (FILE *, tree, const char *,
- unsigned HOST_WIDE_INT, int)
- ATTRIBUTE_UNUSED;
-#endif
-#endif /* BSS_SECTION_ASM_OP */
-static void mark_weak (tree);
-static void output_constant_pool (const char *, tree);
-
-/* Well-known sections, each one associated with some sort of *_ASM_OP. */
-section *text_section;
-section *data_section;
-section *readonly_data_section;
-section *sdata_section;
-section *ctors_section;
-section *dtors_section;
-section *bss_section;
-section *sbss_section;
-
-/* Various forms of common section. All are guaranteed to be nonnull. */
-section *tls_comm_section;
-section *comm_section;
-section *lcomm_section;
-
-/* A SECTION_NOSWITCH section used for declaring global BSS variables.
- May be null. */
-section *bss_noswitch_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
- switch_to_exception_section. */
-section *exception_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 *eh_frame_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. */
-section *in_section;
-
-/* True if code for the current function is currently being directed
- at the cold section. */
-bool in_cold_section_p;
-
-/* A linked list of all the unnamed sections. */
-static GTY(()) section *unnamed_sections;
-
-/* Return a nonzero value if DECL has a section attribute. */
-#ifndef IN_NAMED_SECTION
-#define IN_NAMED_SECTION(DECL) \
- ((TREE_CODE (DECL) == FUNCTION_DECL || TREE_CODE (DECL) == VAR_DECL) \
- && DECL_SECTION_NAME (DECL) != NULL_TREE)
-#endif
-
-/* Hash table of named sections. */
-static GTY((param_is (section))) htab_t section_htab;
-
-/* A table of object_blocks, indexed by section. */
-static GTY((param_is (struct object_block))) htab_t object_block_htab;
-
-/* The next number to use for internal anchor labels. */
-static GTY(()) int anchor_labelno;
-
-/* A pool of constants that can be shared between functions. */
-static GTY(()) struct rtx_constant_pool *shared_constant_pool;
-
-/* Helper routines for maintaining section_htab. */
-
-static int
-section_entry_eq (const void *p1, const void *p2)
-{
- const section *old = p1;
- const char *new = p2;
-
- return strcmp (old->named.name, new) == 0;
-}
-
-static hashval_t
-section_entry_hash (const void *p)
-{
- const section *old = p;
- return htab_hash_string (old->named.name);
-}
-
-/* Return a hash value for section SECT. */
-
-static hashval_t
-hash_section (section *sect)
-{
- if (sect->common.flags & SECTION_NAMED)
- return htab_hash_string (sect->named.name);
- return sect->common.flags;
-}
-
-/* Helper routines for maintaining object_block_htab. */
-
-static int
-object_block_entry_eq (const void *p1, const void *p2)
-{
- const struct object_block *old = p1;
- const section *new = p2;
-
- return old->sect == new;
-}
-
-static hashval_t
-object_block_entry_hash (const void *p)
-{
- const struct object_block *old = p;
- return hash_section (old->sect);
-}
-
-/* Return a new unnamed section with the given fields. */
-
-section *
-get_unnamed_section (unsigned int flags, void (*callback) (const void *),
- const void *data)
-{
- section *sect;
-
- sect = ggc_alloc (sizeof (struct unnamed_section));
- sect->unnamed.common.flags = flags | SECTION_UNNAMED;
- sect->unnamed.callback = callback;
- sect->unnamed.data = data;
- sect->unnamed.next = unnamed_sections;
-
- unnamed_sections = sect;
- return sect;
-}
-
-/* Return a SECTION_NOSWITCH section with the given fields. */
-
-static section *
-get_noswitch_section (unsigned int flags, noswitch_section_callback callback)
-{
- section *sect;
-
- sect = ggc_alloc (sizeof (struct unnamed_section));
- sect->noswitch.common.flags = flags | SECTION_NOSWITCH;
- sect->noswitch.callback = callback;
-
- return sect;
-}
-
-/* Return the named section structure associated with NAME. Create
- a new section with the given fields if no such structure exists. */
-
-section *
-get_section (const char *name, unsigned int flags, tree decl)
-{
- section *sect, **slot;
-
- slot = (section **)
- htab_find_slot_with_hash (section_htab, name,
- htab_hash_string (name), INSERT);
- flags |= SECTION_NAMED;
- if (*slot == NULL)
- {
- sect = ggc_alloc (sizeof (struct named_section));
- sect->named.common.flags = flags;
- sect->named.name = ggc_strdup (name);
- sect->named.decl = decl;
- *slot = sect;
- }
- else
- {
- sect = *slot;
- if ((sect->common.flags & ~SECTION_DECLARED) != flags
- && ((sect->common.flags | flags) & SECTION_OVERRIDE) == 0)
- {
- /* Sanity check user variables for flag changes. */
- if (decl == 0)
- decl = sect->named.decl;
- gcc_assert (decl);
- error ("%+D causes a section type conflict", decl);
- }
- }
- return sect;
-}
-
-/* Return true if the current compilation mode benefits from having
- objects grouped into blocks. */
-
-static bool
-use_object_blocks_p (void)
-{
- return flag_section_anchors;
-}
-
-/* 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. */
-
-static struct object_block *
-get_block_for_section (section *sect)
-{
- struct object_block *block;
- void **slot;
-
- if (sect == NULL)
- return NULL;
-
- slot = htab_find_slot_with_hash (object_block_htab, sect,
- hash_section (sect), INSERT);
- block = (struct object_block *) *slot;
- if (block == NULL)
- {
- block = (struct object_block *)
- ggc_alloc_cleared (sizeof (struct object_block));
- block->sect = sect;
- *slot = block;
- }
- return block;
-}
-
-/* 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. */
-
-static rtx
-create_block_symbol (const char *label, struct object_block *block,
- HOST_WIDE_INT offset)
-{
- rtx symbol;
- unsigned int size;
-
- /* Create the extended SYMBOL_REF. */
- size = RTX_HDR_SIZE + sizeof (struct block_symbol);
- symbol = ggc_alloc_zone (size, &rtl_zone);
-
- /* Initialize the normal SYMBOL_REF fields. */
- memset (symbol, 0, size);
- PUT_CODE (symbol, SYMBOL_REF);
- PUT_MODE (symbol, Pmode);
- XSTR (symbol, 0) = label;
- SYMBOL_REF_FLAGS (symbol) = SYMBOL_FLAG_HAS_BLOCK_INFO;
-
- /* Initialize the block_symbol stuff. */
- SYMBOL_REF_BLOCK (symbol) = block;
- SYMBOL_REF_BLOCK_OFFSET (symbol) = offset;
-
- return symbol;
-}
-
-static void
-initialize_cold_section_name (void)
-{
- const char *stripped_name;
- char *name, *buffer;
- tree dsn;
-
- gcc_assert (cfun && current_function_decl);
- if (cfun->unlikely_text_section_name)
- return;
-
- dsn = DECL_SECTION_NAME (current_function_decl);
- if (flag_function_sections && dsn)
- {
- name = alloca (TREE_STRING_LENGTH (dsn) + 1);
- memcpy (name, TREE_STRING_POINTER (dsn), TREE_STRING_LENGTH (dsn) + 1);
-
- stripped_name = targetm.strip_name_encoding (name);
-
- buffer = ACONCAT ((stripped_name, "_unlikely", NULL));
- cfun->unlikely_text_section_name = ggc_strdup (buffer);
- }
- else
- cfun->unlikely_text_section_name = UNLIKELY_EXECUTED_TEXT_SECTION_NAME;
-}
-
-/* Tell assembler to switch to unlikely-to-be-executed text section. */
-
-section *
-unlikely_text_section (void)
-{
- if (cfun)
- {
- if (!cfun->unlikely_text_section_name)
- initialize_cold_section_name ();
-
- return get_named_section (NULL, cfun->unlikely_text_section_name, 0);
- }
- else
- return get_named_section (NULL, UNLIKELY_EXECUTED_TEXT_SECTION_NAME, 0);
-}
-
-/* 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. */
-
-bool
-unlikely_text_section_p (section *sect)
-{
- const char *name;
-
- if (cfun)
- name = cfun->unlikely_text_section_name;
- else
- name = UNLIKELY_EXECUTED_TEXT_SECTION_NAME;
-
- return (name
- && sect
- && SECTION_STYLE (sect) == SECTION_NAMED
- && strcmp (name, sect->named.name) == 0);
-}
-
-/* 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
- section_type_flags. */
-
-section *
-get_named_section (tree decl, const char *name, int reloc)
-{
- unsigned int flags;
-
- gcc_assert (!decl || DECL_P (decl));
- if (name == NULL)
- name = TREE_STRING_POINTER (DECL_SECTION_NAME (decl));
-
- flags = targetm.section_type_flags (decl, name, reloc);
-
- return get_section (name, flags, decl);
-}
-
-/* If required, set DECL_SECTION_NAME to a unique name. */
-
-void
-resolve_unique_section (tree decl, int reloc ATTRIBUTE_UNUSED,
- int flag_function_or_data_sections)
-{
- if (DECL_SECTION_NAME (decl) == NULL_TREE
- && targetm.have_named_sections
- && (flag_function_or_data_sections
- || DECL_ONE_ONLY (decl)))
- targetm.asm_out.unique_section (decl, reloc);
-}
-
-#ifdef BSS_SECTION_ASM_OP
-
-#ifdef ASM_OUTPUT_BSS
-
-/* Utility function for ASM_OUTPUT_BSS for targets to use if
- they don't support alignments in .bss.
- ??? It is believed that this function will work in most cases so such
- support is localized here. */
-
-static void
-asm_output_bss (FILE *file, tree decl ATTRIBUTE_UNUSED,
- const char *name,
- unsigned HOST_WIDE_INT size ATTRIBUTE_UNUSED,
- unsigned HOST_WIDE_INT rounded)
-{
- targetm.asm_out.globalize_label (file, name);
- switch_to_section (bss_section);
-#ifdef ASM_DECLARE_OBJECT_NAME
- last_assemble_variable_decl = decl;
- ASM_DECLARE_OBJECT_NAME (file, name, decl);
-#else
- /* Standard thing is just output label for the object. */
- ASM_OUTPUT_LABEL (file, name);
-#endif /* ASM_DECLARE_OBJECT_NAME */
- ASM_OUTPUT_SKIP (file, rounded ? rounded : 1);
-}
-
-#endif
-
-#ifdef ASM_OUTPUT_ALIGNED_BSS
-
-/* Utility function for targets to use in implementing
- ASM_OUTPUT_ALIGNED_BSS.
- ??? It is believed that this function will work in most cases so such
- support is localized here. */
-
-static void
-asm_output_aligned_bss (FILE *file, tree decl ATTRIBUTE_UNUSED,
- const char *name, unsigned HOST_WIDE_INT size,
- int align)
-{
- switch_to_section (bss_section);
- ASM_OUTPUT_ALIGN (file, floor_log2 (align / BITS_PER_UNIT));
-#ifdef ASM_DECLARE_OBJECT_NAME
- last_assemble_variable_decl = decl;
- ASM_DECLARE_OBJECT_NAME (file, name, decl);
-#else
- /* Standard thing is just output label for the object. */
- ASM_OUTPUT_LABEL (file, name);
-#endif /* ASM_DECLARE_OBJECT_NAME */
- ASM_OUTPUT_SKIP (file, size ? size : 1);
-}
-
-#endif
-
-#endif /* BSS_SECTION_ASM_OP */
-
-#ifndef USE_SELECT_SECTION_FOR_FUNCTIONS
-/* Return the hot section for function DECL. Return text_section for
- null DECLs. */
-
-static section *
-hot_function_section (tree decl)
-{
- if (decl != NULL_TREE
- && DECL_SECTION_NAME (decl) != NULL_TREE
- && targetm.have_named_sections)
- return get_named_section (decl, NULL, 0);
- else
- return text_section;
-}
-#endif
-
-/* 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. */
-
-section *
-function_section (tree decl)
-{
- int reloc = 0;
-
- if (first_function_block_is_cold)
- reloc = 1;
-
-#ifdef USE_SELECT_SECTION_FOR_FUNCTIONS
- if (decl != NULL_TREE
- && DECL_SECTION_NAME (decl) != NULL_TREE)
- return reloc ? unlikely_text_section ()
- : get_named_section (decl, NULL, 0);
- else
- return targetm.asm_out.select_section (decl, reloc, DECL_ALIGN (decl));
-#else
- return reloc ? unlikely_text_section () : hot_function_section (decl);
-#endif
-}
-
-section *
-current_function_section (void)
-{
-#ifdef USE_SELECT_SECTION_FOR_FUNCTIONS
- if (current_function_decl != NULL_TREE
- && DECL_SECTION_NAME (current_function_decl) != NULL_TREE)
- return in_cold_section_p ? unlikely_text_section ()
- : get_named_section (current_function_decl,
- NULL, 0);
- else
- return targetm.asm_out.select_section (current_function_decl,
- in_cold_section_p,
- DECL_ALIGN (current_function_decl));
-#else
- return (in_cold_section_p
- ? unlikely_text_section ()
- : hot_function_section (current_function_decl));
-#endif
-}
-
-/* Return the read-only data section associated with function DECL. */
-
-section *
-default_function_rodata_section (tree decl)
-{
- if (decl != NULL_TREE && DECL_SECTION_NAME (decl))
- {
- const char *name = TREE_STRING_POINTER (DECL_SECTION_NAME (decl));
-
- if (DECL_ONE_ONLY (decl) && HAVE_COMDAT_GROUP)
- {
- size_t len = strlen (name) + 3;
- char* rname = alloca (len);
-
- strcpy (rname, ".rodata");
- strcat (rname, name + 5);
- return get_section (rname, SECTION_LINKONCE, decl);
- }
- /* For .gnu.linkonce.t.foo we want to use .gnu.linkonce.r.foo. */
- else if (DECL_ONE_ONLY (decl)
- && strncmp (name, ".gnu.linkonce.t.", 16) == 0)
- {
- size_t len = strlen (name) + 1;
- char *rname = alloca (len);
-
- memcpy (rname, name, len);
- rname[14] = 'r';
- return get_section (rname, SECTION_LINKONCE, decl);
- }
- /* For .text.foo we want to use .rodata.foo. */
- else if (flag_function_sections && flag_data_sections
- && strncmp (name, ".text.", 6) == 0)
- {
- size_t len = strlen (name) + 1;
- char *rname = alloca (len + 2);
-
- memcpy (rname, ".rodata", 7);
- memcpy (rname + 7, name + 5, len - 5);
- return get_section (rname, 0, decl);
- }
- }
-
- return readonly_data_section;
-}
-
-/* Return the read-only data section associated with function DECL
- for targets where that section should be always the single
- readonly data section. */
-
-section *
-default_no_function_rodata_section (tree decl ATTRIBUTE_UNUSED)
-{
- return readonly_data_section;
-}
-
-/* Return the section to use for string merging. */
-
-static section *
-mergeable_string_section (tree decl ATTRIBUTE_UNUSED,
- unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED,
- unsigned int flags ATTRIBUTE_UNUSED)
-{
- HOST_WIDE_INT len;
-
- if (HAVE_GAS_SHF_MERGE && flag_merge_constants
- && TREE_CODE (decl) == STRING_CST
- && TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE
- && align <= 256
- && (len = int_size_in_bytes (TREE_TYPE (decl))) > 0
- && TREE_STRING_LENGTH (decl) >= len)
- {
- enum machine_mode mode;
- unsigned int modesize;
- const char *str;
- HOST_WIDE_INT i;
- int j, unit;
- char name[30];
-
- mode = TYPE_MODE (TREE_TYPE (TREE_TYPE (decl)));
- modesize = GET_MODE_BITSIZE (mode);
- if (modesize >= 8 && modesize <= 256
- && (modesize & (modesize - 1)) == 0)
- {
- if (align < modesize)
- align = modesize;
-
- str = TREE_STRING_POINTER (decl);
- unit = GET_MODE_SIZE (mode);
-
- /* Check for embedded NUL characters. */
- for (i = 0; i < len; i += unit)
- {
- for (j = 0; j < unit; j++)
- if (str[i + j] != '\0')
- break;
- if (j == unit)
- break;
- }
- if (i == len - unit)
- {
- sprintf (name, ".rodata.str%d.%d", modesize / 8,
- (int) (align / 8));
- flags |= (modesize / 8) | SECTION_MERGE | SECTION_STRINGS;
- return get_section (name, flags, NULL);
- }
- }
- }
-
- return readonly_data_section;
-}
-
-/* Return the section to use for constant merging. */
-
-section *
-mergeable_constant_section (enum machine_mode mode ATTRIBUTE_UNUSED,
- unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED,
- unsigned int flags ATTRIBUTE_UNUSED)
-{
- unsigned int modesize = GET_MODE_BITSIZE (mode);
-
- if (HAVE_GAS_SHF_MERGE && flag_merge_constants
- && mode != VOIDmode
- && mode != BLKmode
- && modesize <= align
- && align >= 8
- && align <= 256
- && (align & (align - 1)) == 0)
- {
- char name[24];
-
- sprintf (name, ".rodata.cst%d", (int) (align / 8));
- flags |= (align / 8) | SECTION_MERGE;
- return get_section (name, flags, NULL);
- }
- return readonly_data_section;
-}
-
-/* Given NAME, a putative register name, discard any customary prefixes. */
-
-static const char *
-strip_reg_name (const char *name)
-{
-#ifdef REGISTER_PREFIX
- if (!strncmp (name, REGISTER_PREFIX, strlen (REGISTER_PREFIX)))
- name += strlen (REGISTER_PREFIX);
-#endif
- if (name[0] == '%' || name[0] == '#')
- name++;
- return 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
- it. */
-void
-set_user_assembler_name (tree decl, const char *name)
-{
- char *starred = alloca (strlen (name) + 2);
- starred[0] = '*';
- strcpy (starred + 1, name);
- change_decl_assembler_name (decl, get_identifier (starred));
- SET_DECL_RTL (decl, NULL_RTX);
-}
-
-/* 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. */
-
-int
-decode_reg_name (const char *asmspec)
-{
- if (asmspec != 0)
- {
- int i;
-
- /* Get rid of confusing prefixes. */
- asmspec = strip_reg_name (asmspec);
-
- /* Allow a decimal number as a "register name". */
- for (i = strlen (asmspec) - 1; i >= 0; i--)
- if (! ISDIGIT (asmspec[i]))
- break;
- if (asmspec[0] != 0 && i < 0)
- {
- i = atoi (asmspec);
- if (i < FIRST_PSEUDO_REGISTER && i >= 0)
- return i;
- else
- return -2;
- }
-
- for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
- if (reg_names[i][0]
- && ! strcmp (asmspec, strip_reg_name (reg_names[i])))
- return i;
-
-#ifdef ADDITIONAL_REGISTER_NAMES
- {
- static const struct { const char *const name; const int number; } table[]
- = ADDITIONAL_REGISTER_NAMES;
-
- for (i = 0; i < (int) ARRAY_SIZE (table); i++)
- if (table[i].name[0]
- && ! strcmp (asmspec, table[i].name))
- return table[i].number;
- }
-#endif /* ADDITIONAL_REGISTER_NAMES */
-
- if (!strcmp (asmspec, "memory"))
- return -4;
-
- if (!strcmp (asmspec, "cc"))
- return -3;
-
- return -2;
- }
-
- return -1;
-}
-
-/* Return true if DECL's initializer is suitable for a BSS section. */
-
-static bool
-bss_initializer_p (tree decl)
-{
- return (DECL_INITIAL (decl) == NULL
- || DECL_INITIAL (decl) == error_mark_node
- || (flag_zero_initialized_in_bss
- /* Leave constant zeroes in .rodata so they
- can be shared. */
- && !TREE_READONLY (decl)
- && initializer_zerop (DECL_INITIAL (decl))));
-}
-
-/* Compute the alignment of variable specified by DECL.
- DONT_OUTPUT_DATA is from assemble_variable. */
-
-void
-align_variable (tree decl, bool dont_output_data)
-{
- unsigned int align = DECL_ALIGN (decl);
-
- /* 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. */
- if (dont_output_data && DECL_SIZE (decl) == 0
- && TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE)
- align = MAX (align, TYPE_ALIGN (TREE_TYPE (TREE_TYPE (decl))));
-
- /* Some object file formats have a maximum alignment which they support.
- In particular, a.out format supports a maximum alignment of 4. */
- if (align > MAX_OFILE_ALIGNMENT)
- {
- warning (0, "alignment of %q+D is greater than maximum object "
- "file alignment. Using %d", decl,
- MAX_OFILE_ALIGNMENT/BITS_PER_UNIT);
- align = MAX_OFILE_ALIGNMENT;
- }
-
- /* On some machines, it is good to increase alignment sometimes. */
- if (! DECL_USER_ALIGN (decl))
- {
-#ifdef DATA_ALIGNMENT
- align = DATA_ALIGNMENT (TREE_TYPE (decl), align);
-#endif
-#ifdef CONSTANT_ALIGNMENT
- if (DECL_INITIAL (decl) != 0 && DECL_INITIAL (decl) != error_mark_node)
- align = CONSTANT_ALIGNMENT (DECL_INITIAL (decl), align);
-#endif
- }
-
- /* Reset the alignment in case we have made it tighter, so we can benefit
- from it in get_pointer_alignment. */
- DECL_ALIGN (decl) = align;
-}
-
-/* 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. */
-
-static section *
-get_variable_section (tree decl, bool prefer_noswitch_p)
-{
- int reloc;
-
- /* If the decl has been given an explicit section name, then it
- isn't common, and shouldn't be handled as such. */
- if (DECL_COMMON (decl) && DECL_SECTION_NAME (decl) == NULL)
- {
- if (DECL_THREAD_LOCAL_P (decl))
- return tls_comm_section;
- if (TREE_PUBLIC (decl) && bss_initializer_p (decl))
- return comm_section;
- }
-
- if (DECL_INITIAL (decl) == error_mark_node)
- reloc = contains_pointers_p (TREE_TYPE (decl)) ? 3 : 0;
- else if (DECL_INITIAL (decl))
- reloc = compute_reloc_for_constant (DECL_INITIAL (decl));
- else
- reloc = 0;
-
- resolve_unique_section (decl, reloc, flag_data_sections);
- if (IN_NAMED_SECTION (decl))
- return get_named_section (decl, NULL, reloc);
-
- if (!DECL_THREAD_LOCAL_P (decl)
- && !(prefer_noswitch_p && targetm.have_switchable_bss_sections)
- && bss_initializer_p (decl))
- {
- if (!TREE_PUBLIC (decl))
- return lcomm_section;
- if (bss_noswitch_section)
- return bss_noswitch_section;
- }
-
- return targetm.asm_out.select_section (decl, reloc, DECL_ALIGN (decl));
-}
-
-/* Return the block into which object_block DECL should be placed. */
-
-static struct object_block *
-get_block_for_decl (tree decl)
-{
- section *sect;
-
- if (TREE_CODE (decl) == VAR_DECL)
- {
- /* The object must be defined in this translation unit. */
- if (DECL_EXTERNAL (decl))
- return NULL;
-
- /* There's no point using object blocks for something that is
- isolated by definition. */
- if (DECL_ONE_ONLY (decl))
- return NULL;
- }
-
- /* We can only calculate block offsets if the decl has a known
- constant size. */
- if (DECL_SIZE_UNIT (decl) == NULL)
- return NULL;
- if (!host_integerp (DECL_SIZE_UNIT (decl), 1))
- return NULL;
-
- /* Find out which section should contain DECL. We cannot put it into
- an object block if it requires a standalone definition. */
- if (TREE_CODE (decl) == VAR_DECL)
- align_variable (decl, 0);
- sect = get_variable_section (decl, true);
- if (SECTION_STYLE (sect) == SECTION_NOSWITCH)
- return NULL;
-
- return get_block_for_section (sect);
-}
-
-/* Make sure block symbol SYMBOL is in block BLOCK. */
-
-static void
-change_symbol_block (rtx symbol, struct object_block *block)
-{
- if (block != SYMBOL_REF_BLOCK (symbol))
- {
- gcc_assert (SYMBOL_REF_BLOCK_OFFSET (symbol) < 0);
- SYMBOL_REF_BLOCK (symbol) = block;
- }
-}
-
-/* Return true if it is possible to put DECL in an object_block. */
-
-static bool
-use_blocks_for_decl_p (tree decl)
-{
- /* Only data DECLs can be placed into object blocks. */
- if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != CONST_DECL)
- return false;
-
- /* 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 (DECL_INITIAL (decl) == decl)
- return false;
-
- /* If this decl is an alias, then we don't want to emit a definition. */
- if (lookup_attribute ("alias", DECL_ATTRIBUTES (decl)))
- return false;
-
- return true;
-}
-
-/* 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. */
-
-void
-make_decl_rtl (tree decl)
-{
- const char *name = 0;
- int reg_number;
- rtx x;
-
- /* Check that we are not being given an automatic variable. */
- gcc_assert (TREE_CODE (decl) != PARM_DECL
- && TREE_CODE (decl) != RESULT_DECL);
-
- /* A weak alias has TREE_PUBLIC set but not the other bits. */
- gcc_assert (TREE_CODE (decl) != VAR_DECL
- || TREE_STATIC (decl)
- || TREE_PUBLIC (decl)
- || DECL_EXTERNAL (decl)
- || DECL_REGISTER (decl));
-
- /* And that we were not given a type or a label. */
- gcc_assert (TREE_CODE (decl) != TYPE_DECL
- && TREE_CODE (decl) != LABEL_DECL);
-
- /* For a duplicate declaration, we can be called twice on the
- same DECL node. Don't discard the RTL already made. */
- if (DECL_RTL_SET_P (decl))
- {
- /* If the old RTL had the wrong mode, fix the mode. */
- x = DECL_RTL (decl);
- if (GET_MODE (x) != DECL_MODE (decl))
- SET_DECL_RTL (decl, adjust_address_nv (x, DECL_MODE (decl), 0));
-
- if (TREE_CODE (decl) != FUNCTION_DECL && DECL_REGISTER (decl))
- return;
-
- /* ??? 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. */
- targetm.encode_section_info (decl, DECL_RTL (decl), false);
-
- /* If the symbol has a SYMBOL_REF_BLOCK field, update it based
- on the new decl information. */
- if (MEM_P (x)
- && GET_CODE (XEXP (x, 0)) == SYMBOL_REF
- && SYMBOL_REF_HAS_BLOCK_INFO_P (XEXP (x, 0)))
- change_symbol_block (XEXP (x, 0), get_block_for_decl (decl));
-
- /* Make this function static known to the mudflap runtime. */
- if (flag_mudflap && TREE_CODE (decl) == VAR_DECL)
- mudflap_enqueue_decl (decl);
-
- return;
- }
-
- name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
-
- if (name[0] != '*' && TREE_CODE (decl) != FUNCTION_DECL
- && DECL_REGISTER (decl))
- {
- error ("register name not specified for %q+D", decl);
- }
- else if (TREE_CODE (decl) != FUNCTION_DECL && DECL_REGISTER (decl))
- {
- const char *asmspec = name+1;
- reg_number = decode_reg_name (asmspec);
- /* First detect errors in declaring global registers. */
- if (reg_number == -1)
- error ("register name not specified for %q+D", decl);
- else if (reg_number < 0)
- error ("invalid register name for %q+D", decl);
- else if (TYPE_MODE (TREE_TYPE (decl)) == BLKmode)
- error ("data type of %q+D isn%'t suitable for a register",
- decl);
- else if (! HARD_REGNO_MODE_OK (reg_number, TYPE_MODE (TREE_TYPE (decl))))
- error ("register specified for %q+D isn%'t suitable for data type",
- decl);
- /* Now handle properly declared static register variables. */
- else
- {
- int nregs;
-
- if (DECL_INITIAL (decl) != 0 && TREE_STATIC (decl))
- {
- DECL_INITIAL (decl) = 0;
- error ("global register variable has initial value");
- }
- if (TREE_THIS_VOLATILE (decl))
- warning (OPT_Wvolatile_register_var,
- "optimization may eliminate reads and/or "
- "writes to 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... */
-
- SET_DECL_RTL (decl, gen_rtx_raw_REG (DECL_MODE (decl), reg_number));
- ORIGINAL_REGNO (DECL_RTL (decl)) = reg_number;
- REG_USERVAR_P (DECL_RTL (decl)) = 1;
-
- if (TREE_STATIC (decl))
- {
- /* Make this register global, so not usable for anything
- else. */
-#ifdef ASM_DECLARE_REGISTER_GLOBAL
- name = IDENTIFIER_POINTER (DECL_NAME (decl));
- ASM_DECLARE_REGISTER_GLOBAL (asm_out_file, decl, reg_number, name);
-#endif
- nregs = hard_regno_nregs[reg_number][DECL_MODE (decl)];
- while (nregs > 0)
- globalize_reg (reg_number + --nregs);
- }
-
- /* As a register variable, it has no section. */
- return;
- }
- }
- /* Now handle ordinary static variables and functions (in memory).
- Also handle vars declared register invalidly. */
- else if (name[0] == '*')
- {
-#ifdef REGISTER_PREFIX
- if (strlen (REGISTER_PREFIX) != 0)
- {
- reg_number = decode_reg_name (name);
- if (reg_number >= 0 || reg_number == -3)
- error ("register name given for non-register variable %q+D", decl);
- }
-#endif
- }
-
- /* Specifying a section attribute on a variable forces it into a
- non-.bss section, and thus it cannot be common. */
- if (TREE_CODE (decl) == VAR_DECL
- && DECL_SECTION_NAME (decl) != NULL_TREE
- && DECL_INITIAL (decl) == NULL_TREE
- && DECL_COMMON (decl))
- DECL_COMMON (decl) = 0;
-
- /* Variables can't be both common and weak. */
- if (TREE_CODE (decl) == VAR_DECL && DECL_WEAK (decl))
- DECL_COMMON (decl) = 0;
-
- if (use_object_blocks_p () && use_blocks_for_decl_p (decl))
- x = create_block_symbol (name, get_block_for_decl (decl), -1);
- else
- x = gen_rtx_SYMBOL_REF (Pmode, name);
- SYMBOL_REF_WEAK (x) = DECL_WEAK (decl);
- SET_SYMBOL_REF_DECL (x, decl);
-
- x = gen_rtx_MEM (DECL_MODE (decl), x);
- if (TREE_CODE (decl) != FUNCTION_DECL)
- set_mem_attributes (x, decl, 1);
- SET_DECL_RTL (decl, x);
-
- /* 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. */
- targetm.encode_section_info (decl, DECL_RTL (decl), true);
-
- /* Make this function static known to the mudflap runtime. */
- if (flag_mudflap && TREE_CODE (decl) == VAR_DECL)
- mudflap_enqueue_decl (decl);
-}
-
-/* Output a string of literal assembler code
- for an `asm' keyword used between functions. */
-
-void
-assemble_asm (tree string)
-{
- app_enable ();
-
- if (TREE_CODE (string) == ADDR_EXPR)
- string = TREE_OPERAND (string, 0);
-
- fprintf (asm_out_file, "\t%s\n", TREE_STRING_POINTER (string));
-}
-
-/* Record an element in the table of global destructors. SYMBOL is
- a SYMBOL_REF of the function to be called; PRIORITY is a number
- between 0 and MAX_INIT_PRIORITY. */
-
-void
-default_stabs_asm_out_destructor (rtx symbol ATTRIBUTE_UNUSED,
- int priority ATTRIBUTE_UNUSED)
-{
-#if defined DBX_DEBUGGING_INFO || defined XCOFF_DEBUGGING_INFO
- /* Tell GNU LD that this is part of the static destructor set.
- This will work for any system that uses stabs, most usefully
- aout systems. */
- dbxout_begin_simple_stabs ("___DTOR_LIST__", 22 /* N_SETT */);
- dbxout_stab_value_label (XSTR (symbol, 0));
-#else
- sorry ("global destructors not supported on this target");
-#endif
-}
-
-void
-default_named_section_asm_out_destructor (rtx symbol, int priority)
-{
- const char *section = ".dtors";
- char buf[16];
-
- /* ??? This only works reliably with the GNU linker. */
- if (priority != DEFAULT_INIT_PRIORITY)
- {
- sprintf (buf, ".dtors.%.5u",
- /* 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. */
- MAX_INIT_PRIORITY - priority);
- section = buf;
- }
-
- switch_to_section (get_section (section, SECTION_WRITE, NULL));
- assemble_align (POINTER_SIZE);
- assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1);
-}
-
-#ifdef DTORS_SECTION_ASM_OP
-void
-default_dtor_section_asm_out_destructor (rtx symbol,
- int priority ATTRIBUTE_UNUSED)
-{
- switch_to_section (dtors_section);
- assemble_align (POINTER_SIZE);
- assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1);
-}
-#endif
-
-/* Likewise for global constructors. */
-
-void
-default_stabs_asm_out_constructor (rtx symbol ATTRIBUTE_UNUSED,
- int priority ATTRIBUTE_UNUSED)
-{
-#if defined DBX_DEBUGGING_INFO || defined XCOFF_DEBUGGING_INFO
- /* Tell GNU LD that this is part of the static destructor set.
- This will work for any system that uses stabs, most usefully
- aout systems. */
- dbxout_begin_simple_stabs ("___CTOR_LIST__", 22 /* N_SETT */);
- dbxout_stab_value_label (XSTR (symbol, 0));
-#else
- sorry ("global constructors not supported on this target");
-#endif
-}
-
-void
-default_named_section_asm_out_constructor (rtx symbol, int priority)
-{
- const char *section = ".ctors";
- char buf[16];
-
- /* ??? This only works reliably with the GNU linker. */
- if (priority != DEFAULT_INIT_PRIORITY)
- {
- sprintf (buf, ".ctors.%.5u",
- /* 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. */
- MAX_INIT_PRIORITY - priority);
- section = buf;
- }
-
- switch_to_section (get_section (section, SECTION_WRITE, NULL));
- assemble_align (POINTER_SIZE);
- assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1);
-}
-
-#ifdef CTORS_SECTION_ASM_OP
-void
-default_ctor_section_asm_out_constructor (rtx symbol,
- int priority ATTRIBUTE_UNUSED)
-{
- switch_to_section (ctors_section);
- assemble_align (POINTER_SIZE);
- assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1);
-}
-#endif
-
-/* CONSTANT_POOL_BEFORE_FUNCTION may be defined as an expression with
- a nonzero value if the constant pool should be output before the
- start of the function, or a zero value if the pool should output
- after the end of the function. The default is to put it before the
- start. */
-
-#ifndef CONSTANT_POOL_BEFORE_FUNCTION
-#define CONSTANT_POOL_BEFORE_FUNCTION 1
-#endif
-
-/* 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. */
-
-void
-notice_global_symbol (tree decl)
-{
- const char **type = &first_global_object_name;
-
- if (first_global_object_name
- || !TREE_PUBLIC (decl)
- || DECL_EXTERNAL (decl)
- || !DECL_NAME (decl)
- || (TREE_CODE (decl) != FUNCTION_DECL
- && (TREE_CODE (decl) != VAR_DECL
- || (DECL_COMMON (decl)
- && (DECL_INITIAL (decl) == 0
- || DECL_INITIAL (decl) == error_mark_node))))
- || !MEM_P (DECL_RTL (decl)))
- return;
-
- /* 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. */
- if (DECL_WEAK (decl) || DECL_ONE_ONLY (decl))
- type = &weak_global_object_name;
-
- if (!*type)
- {
- const char *p;
- const char *name;
- rtx decl_rtl = DECL_RTL (decl);
-
- p = targetm.strip_name_encoding (XSTR (XEXP (decl_rtl, 0), 0));
- name = ggc_strdup (p);
-
- *type = name;
- }
-}
-
-/* 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. */
-
-void
-assemble_start_function (tree decl, const char *fnname)
-{
- int align;
- char tmp_label[100];
- bool hot_label_written = false;
-
- cfun->unlikely_text_section_name = NULL;
-
- first_function_block_is_cold = false;
- if (flag_reorder_blocks_and_partition)
- {
- ASM_GENERATE_INTERNAL_LABEL (tmp_label, "LHOTB", const_labelno);
- cfun->hot_section_label = ggc_strdup (tmp_label);
- ASM_GENERATE_INTERNAL_LABEL (tmp_label, "LCOLDB", const_labelno);
- cfun->cold_section_label = ggc_strdup (tmp_label);
- ASM_GENERATE_INTERNAL_LABEL (tmp_label, "LHOTE", const_labelno);
- cfun->hot_section_end_label = ggc_strdup (tmp_label);
- ASM_GENERATE_INTERNAL_LABEL (tmp_label, "LCOLDE", const_labelno);
- cfun->cold_section_end_label = ggc_strdup (tmp_label);
- const_labelno++;
- }
- else
- {
- cfun->hot_section_label = NULL;
- cfun->cold_section_label = NULL;
- cfun->hot_section_end_label = NULL;
- cfun->cold_section_end_label = NULL;
- }
-
- /* The following code does not need preprocessing in the assembler. */
-
- app_disable ();
-
- if (CONSTANT_POOL_BEFORE_FUNCTION)
- output_constant_pool (fnname, decl);
-
- resolve_unique_section (decl, 0, flag_function_sections);
-
- /* 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. */
-
- if (flag_reorder_blocks_and_partition)
- {
- switch_to_section (unlikely_text_section ());
-/* APPLE LOCAL begin for-fsf-4_4 3274130 5295549 */ \
- assemble_align (DECL_ALIGN (decl));
-/* APPLE LOCAL end for-fsf-4_4 3274130 5295549 */ \
- ASM_OUTPUT_LABEL (asm_out_file, cfun->cold_section_label);
-
- /* 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. */
- if (!current_function_is_thunk
- && BB_PARTITION (ENTRY_BLOCK_PTR->next_bb) == BB_COLD_PARTITION)
- {
- switch_to_section (text_section);
-/* APPLE LOCAL begin for-fsf-4_4 3274130 5295549 */ \
- assemble_align (DECL_ALIGN (decl));
-/* APPLE LOCAL end for-fsf-4_4 3274130 5295549 */ \
- ASM_OUTPUT_LABEL (asm_out_file, cfun->hot_section_label);
- hot_label_written = true;
- first_function_block_is_cold = true;
- }
- }
- else if (DECL_SECTION_NAME (decl))
- {
- /* Calls to function_section rely on first_function_block_is_cold
- being accurate. The first block may be cold even if we aren't
- doing partitioning, if the entire function was decided by
- choose_function_section (predict.c) to be cold. */
-
- initialize_cold_section_name ();
-
- if (cfun->unlikely_text_section_name
- && strcmp (TREE_STRING_POINTER (DECL_SECTION_NAME (decl)),
- cfun->unlikely_text_section_name) == 0)
- first_function_block_is_cold = true;
- }
-
- in_cold_section_p = first_function_block_is_cold;
-
- /* Switch to the correct text section for the start of the function. */
-
- switch_to_section (function_section (decl));
- if (flag_reorder_blocks_and_partition
- && !hot_label_written)
- ASM_OUTPUT_LABEL (asm_out_file, cfun->hot_section_label);
-
- /* APPLE LOCAL begin mainline aligned functions 5933878 */
- /* Tell assembler to move to target machine's alignment for functions. */
- align = floor_log2 (DECL_ALIGN (decl) / BITS_PER_UNIT);
- if (align > 0)
- {
- ASM_OUTPUT_ALIGN (asm_out_file, align);
- }
-
- /* 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. */
- if (! DECL_USER_ALIGN (decl)
- && align_functions_log > align
- && cfun->function_frequency != FUNCTION_FREQUENCY_UNLIKELY_EXECUTED)
- {
-#ifdef ASM_OUTPUT_MAX_SKIP_ALIGN
- ASM_OUTPUT_MAX_SKIP_ALIGN (asm_out_file,
- align_functions_log, align_functions - 1);
-#else
- ASM_OUTPUT_ALIGN (asm_out_file, align_functions_log);
-#endif
- }
- /* APPLE LOCAL end mainline aligned functions 5933878 */
-
-#ifdef ASM_OUTPUT_FUNCTION_PREFIX
- ASM_OUTPUT_FUNCTION_PREFIX (asm_out_file, fnname);
-#endif
-
- (*debug_hooks->begin_function) (decl);
-
- /* Make function name accessible from other files, if appropriate. */
-
- if (TREE_PUBLIC (decl))
- {
- notice_global_symbol (decl);
-
- globalize_decl (decl);
-
- maybe_assemble_visibility (decl);
- }
-
- if (DECL_PRESERVE_P (decl))
- targetm.asm_out.mark_decl_preserved (fnname);
-
- /* Do any machine/system dependent processing of the function name. */
-#ifdef ASM_DECLARE_FUNCTION_NAME
- ASM_DECLARE_FUNCTION_NAME (asm_out_file, fnname, current_function_decl);
-#else
- /* Standard thing is just output label for the function. */
- ASM_OUTPUT_LABEL (asm_out_file, fnname);
-#endif /* ASM_DECLARE_FUNCTION_NAME */
-}
-
-/* Output assembler code associated with defining the size of the
- function. DECL describes the function. NAME is the function's name. */
-
-void
-assemble_end_function (tree decl, const char *fnname ATTRIBUTE_UNUSED)
-{
-#ifdef ASM_DECLARE_FUNCTION_SIZE
- /* We could have switched section in the middle of the function. */
- if (flag_reorder_blocks_and_partition)
- switch_to_section (function_section (decl));
- ASM_DECLARE_FUNCTION_SIZE (asm_out_file, fnname, decl);
-#endif
- if (! CONSTANT_POOL_BEFORE_FUNCTION)
- {
- output_constant_pool (fnname, decl);
- switch_to_section (function_section (decl)); /* need to switch back */
- }
- /* Output labels for end of hot/cold text sections (to be used by
- debug info.) */
- if (flag_reorder_blocks_and_partition)
- {
- section *save_text_section;
-
- save_text_section = in_section;
- switch_to_section (unlikely_text_section ());
- ASM_OUTPUT_LABEL (asm_out_file, cfun->cold_section_end_label);
- if (first_function_block_is_cold)
- switch_to_section (text_section);
- else
- switch_to_section (function_section (decl));
- ASM_OUTPUT_LABEL (asm_out_file, cfun->hot_section_end_label);
- switch_to_section (save_text_section);
- }
-}
-
-/* Assemble code to leave SIZE bytes of zeros. */
-
-void
-assemble_zeros (unsigned HOST_WIDE_INT size)
-{
- /* Do no output if -fsyntax-only. */
- if (flag_syntax_only)
- return;
-
-#ifdef ASM_NO_SKIP_IN_TEXT
- /* The `space' pseudo in the text section outputs nop insns rather than 0s,
- so we must output 0s explicitly in the text section. */
- if (ASM_NO_SKIP_IN_TEXT && (in_section->common.flags & SECTION_CODE) != 0)
- {
- unsigned HOST_WIDE_INT i;
- for (i = 0; i < size; i++)
- assemble_integer (const0_rtx, 1, BITS_PER_UNIT, 1);
- }
- else
-#endif
- if (size > 0)
- ASM_OUTPUT_SKIP (asm_out_file, size);
-}
-
-/* Assemble an alignment pseudo op for an ALIGN-bit boundary. */
-
-void
-assemble_align (int align)
-{
- if (align > BITS_PER_UNIT)
- {
- ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (align / BITS_PER_UNIT));
- }
-}
-
-/* Assemble a string constant with the specified C string as contents. */
-
-void
-assemble_string (const char *p, int size)
-{
- int pos = 0;
- int maximum = 2000;
-
- /* If the string is very long, split it up. */
-
- while (pos < size)
- {
- int thissize = size - pos;
- if (thissize > maximum)
- thissize = maximum;
-
- ASM_OUTPUT_ASCII (asm_out_file, p, thissize);
-
- pos += thissize;
- p += thissize;
- }
-}
-
-
-/* A noswitch_section_callback for lcomm_section. */
-
-static bool
-emit_local (tree decl ATTRIBUTE_UNUSED,
- const char *name ATTRIBUTE_UNUSED,
- unsigned HOST_WIDE_INT size ATTRIBUTE_UNUSED,
- unsigned HOST_WIDE_INT rounded ATTRIBUTE_UNUSED)
-{
-#if defined ASM_OUTPUT_ALIGNED_DECL_LOCAL
- ASM_OUTPUT_ALIGNED_DECL_LOCAL (asm_out_file, decl, name,
- size, DECL_ALIGN (decl));
- return true;
-#elif defined ASM_OUTPUT_ALIGNED_LOCAL
- ASM_OUTPUT_ALIGNED_LOCAL (asm_out_file, name, size, DECL_ALIGN (decl));
- return true;
-#else
- ASM_OUTPUT_LOCAL (asm_out_file, name, size, rounded);
- return false;
-#endif
-}
-
-/* A noswitch_section_callback for bss_noswitch_section. */
-
-#if defined ASM_OUTPUT_ALIGNED_BSS || defined ASM_OUTPUT_BSS
-static bool
-emit_bss (tree decl ATTRIBUTE_UNUSED,
- const char *name ATTRIBUTE_UNUSED,
- unsigned HOST_WIDE_INT size ATTRIBUTE_UNUSED,
- unsigned HOST_WIDE_INT rounded ATTRIBUTE_UNUSED)
-{
-#if defined ASM_OUTPUT_ALIGNED_BSS
- ASM_OUTPUT_ALIGNED_BSS (asm_out_file, decl, name, size, DECL_ALIGN (decl));
- return true;
-#else
- ASM_OUTPUT_BSS (asm_out_file, decl, name, size, rounded);
- return false;
-#endif
-}
-#endif
-
-/* A noswitch_section_callback for comm_section. */
-
-static bool
-emit_common (tree decl ATTRIBUTE_UNUSED,
- const char *name ATTRIBUTE_UNUSED,
- unsigned HOST_WIDE_INT size ATTRIBUTE_UNUSED,
- unsigned HOST_WIDE_INT rounded ATTRIBUTE_UNUSED)
-{
-#if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
- ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file, decl, name,
- size, DECL_ALIGN (decl));
- return true;
-#elif defined ASM_OUTPUT_ALIGNED_COMMON
- ASM_OUTPUT_ALIGNED_COMMON (asm_out_file, name, size, DECL_ALIGN (decl));
- return true;
-#else
- ASM_OUTPUT_COMMON (asm_out_file, name, size, rounded);
- return false;
-#endif
-}
-
-/* A noswitch_section_callback for tls_comm_section. */
-
-static bool
-emit_tls_common (tree decl ATTRIBUTE_UNUSED,
- const char *name ATTRIBUTE_UNUSED,
- unsigned HOST_WIDE_INT size ATTRIBUTE_UNUSED,
- unsigned HOST_WIDE_INT rounded ATTRIBUTE_UNUSED)
-{
-#ifdef ASM_OUTPUT_TLS_COMMON
- ASM_OUTPUT_TLS_COMMON (asm_out_file, decl, name, size);
- return true;
-#else
- sorry ("thread-local COMMON data not implemented");
- return true;
-#endif
-}
-
-/* Assemble DECL given that it belongs in SECTION_NOSWITCH section SECT.
- NAME is the name of DECL's SYMBOL_REF. */
-
-static void
-assemble_noswitch_variable (tree decl, const char *name, section *sect)
-{
- unsigned HOST_WIDE_INT size, rounded;
-
- size = tree_low_cst (DECL_SIZE_UNIT (decl), 1);
- rounded = size;
-
- /* Don't allocate zero bytes of common,
- since that means "undefined external" in the linker. */
- if (size == 0)
- rounded = 1;
-
- /* Round size up to multiple of BIGGEST_ALIGNMENT bits
- so that each uninitialized object starts on such a boundary. */
- rounded += (BIGGEST_ALIGNMENT / BITS_PER_UNIT) - 1;
- rounded = (rounded / (BIGGEST_ALIGNMENT / BITS_PER_UNIT)
- * (BIGGEST_ALIGNMENT / BITS_PER_UNIT));
-
- if (!sect->noswitch.callback (decl, name, size, rounded)
- && (unsigned HOST_WIDE_INT) DECL_ALIGN_UNIT (decl) > rounded)
- warning (0, "requested alignment for %q+D is greater than "
- "implemented alignment of %wu", decl, rounded);
-}
-
-/* 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. */
-
-static void
-assemble_variable_contents (tree decl, const char *name,
- bool dont_output_data)
-{
- /* Do any machine/system dependent processing of the object. */
-#ifdef ASM_DECLARE_OBJECT_NAME
- last_assemble_variable_decl = decl;
- ASM_DECLARE_OBJECT_NAME (asm_out_file, name, decl);
-#else
- /* Standard thing is just output label for the object. */
- ASM_OUTPUT_LABEL (asm_out_file, name);
-#endif /* ASM_DECLARE_OBJECT_NAME */
-
- if (!dont_output_data)
- {
- if (DECL_INITIAL (decl)
- && DECL_INITIAL (decl) != error_mark_node
- && !initializer_zerop (DECL_INITIAL (decl)))
- /* Output the actual data. */
- output_constant (DECL_INITIAL (decl),
- tree_low_cst (DECL_SIZE_UNIT (decl), 1),
- DECL_ALIGN (decl));
- else
- /* Leave space for it. */
- assemble_zeros (tree_low_cst (DECL_SIZE_UNIT (decl), 1));
- }
-}
-
-/* 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). */
-
-void
-assemble_variable (tree decl, int top_level ATTRIBUTE_UNUSED,
- int at_end ATTRIBUTE_UNUSED, int dont_output_data)
-{
- const char *name;
- rtx decl_rtl, symbol;
- section *sect;
-
- if (lang_hooks.decls.prepare_assemble_variable)
- lang_hooks.decls.prepare_assemble_variable (decl);
-
- last_assemble_variable_decl = 0;
-
- /* 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. */
-
- if (DECL_EXTERNAL (decl))
- return;
-
- /* Output no assembler code for a function declaration.
- Only definitions of functions output anything. */
-
- if (TREE_CODE (decl) == FUNCTION_DECL)
- return;
-
- /* Do nothing for global register variables. */
- if (DECL_RTL_SET_P (decl) && REG_P (DECL_RTL (decl)))
- {
- TREE_ASM_WRITTEN (decl) = 1;
- return;
- }
-
- /* If type was incomplete when the variable was declared,
- see if it is complete now. */
-
- if (DECL_SIZE (decl) == 0)
- layout_decl (decl, 0);
-
- /* Still incomplete => don't allocate it; treat the tentative defn
- (which is what it must have been) as an `extern' reference. */
-
- if (!dont_output_data && DECL_SIZE (decl) == 0)
- {
- error ("storage size of %q+D isn%'t known", decl);
- TREE_ASM_WRITTEN (decl) = 1;
- return;
- }
-
- /* 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. */
-
- if (TREE_ASM_WRITTEN (decl))
- return;
-
- /* Make sure targetm.encode_section_info is invoked before we set
- ASM_WRITTEN. */
- decl_rtl = DECL_RTL (decl);
-
- TREE_ASM_WRITTEN (decl) = 1;
-
- /* Do no output if -fsyntax-only. */
- if (flag_syntax_only)
- return;
-
- /* APPLE LOCAL begin duplicate decls in multiple files. */
- if (DECL_DUPLICATE_DECL (decl))
- return;
- /* APPLE LOCAL end duplicate decls in multiple files. */
-
- app_disable ();
-
- if (! dont_output_data
- && ! host_integerp (DECL_SIZE_UNIT (decl), 1))
- {
- error ("size of variable %q+D is too large", decl);
- return;
- }
-
- gcc_assert (MEM_P (decl_rtl));
- gcc_assert (GET_CODE (XEXP (decl_rtl, 0)) == SYMBOL_REF);
- symbol = XEXP (decl_rtl, 0);
- name = XSTR (symbol, 0);
- if (TREE_PUBLIC (decl) && DECL_NAME (decl))
- notice_global_symbol (decl);
-
- /* Compute the alignment of this data. */
-
- align_variable (decl, dont_output_data);
- set_mem_align (decl_rtl, DECL_ALIGN (decl));
-
- if (TREE_PUBLIC (decl))
- maybe_assemble_visibility (decl);
-
- if (DECL_PRESERVE_P (decl))
- targetm.asm_out.mark_decl_preserved (name);
-
- /* First make the assembler name(s) global if appropriate. */
- sect = get_variable_section (decl, false);
- if (TREE_PUBLIC (decl)
- && DECL_NAME (decl)
- && (sect->common.flags & SECTION_COMMON) == 0)
- globalize_decl (decl);
-
- /* Output any data that we will need to use the address of. */
- if (DECL_INITIAL (decl) && DECL_INITIAL (decl) != error_mark_node)
- output_addressed_constants (DECL_INITIAL (decl));
-
- /* APPLE LOCAL begin zerofill 20020218 --turly */
-#ifdef ASM_OUTPUT_ZEROFILL
- /* We need a ZEROFILL COALESCED option! */
- if ((sect->common.flags & SECTION_COMMON) == 0
- && ! dont_output_data
- && ! DECL_ONE_ONLY (decl)
- && ! DECL_WEAK (decl)
- && (DECL_INITIAL (decl) == 0 || DECL_INITIAL (decl) == error_mark_node))
- {
- ASM_OUTPUT_ZEROFILL (asm_out_file, name, sect,
- tree_low_cst (DECL_SIZE_UNIT (decl), 1),
- floor_log2 (DECL_ALIGN (decl) / BITS_PER_UNIT));
-
- /********************************/
- /* NOTE THE EARLY RETURN HERE!! */
- /********************************/
- return;
- }
-#endif
- /* APPLE LOCAL end zerofill 20020218 --turly */
-
- /* dbxout.c needs to know this. */
- if (sect && (sect->common.flags & SECTION_CODE) != 0)
- DECL_IN_TEXT_SECTION (decl) = 1;
-
- /* 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. */
- if (SYMBOL_REF_HAS_BLOCK_INFO_P (symbol) && SYMBOL_REF_BLOCK (symbol))
- {
- gcc_assert (!dont_output_data);
- place_block_symbol (symbol);
- }
- else if (SECTION_STYLE (sect) == SECTION_NOSWITCH)
- assemble_noswitch_variable (decl, name, sect);
- else
- {
- switch_to_section (sect);
- if (DECL_ALIGN (decl) > BITS_PER_UNIT)
- ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (DECL_ALIGN_UNIT (decl)));
- assemble_variable_contents (decl, name, dont_output_data);
- }
-}
-
-/* Return 1 if type TYPE contains any pointers. */
-
-static int
-contains_pointers_p (tree type)
-{
- switch (TREE_CODE (type))
- {
- case POINTER_TYPE:
- case REFERENCE_TYPE:
- /* I'm not sure whether OFFSET_TYPE needs this treatment,
- so I'll play safe and return 1. */
- case OFFSET_TYPE:
- return 1;
-
- case RECORD_TYPE:
- case UNION_TYPE:
- case QUAL_UNION_TYPE:
- {
- tree fields;
- /* For a type that has fields, see if the fields have pointers. */
- for (fields = TYPE_FIELDS (type); fields; fields = TREE_CHAIN (fields))
- if (TREE_CODE (fields) == FIELD_DECL
- && contains_pointers_p (TREE_TYPE (fields)))
- return 1;
- return 0;
- }
-
- case ARRAY_TYPE:
- /* An array type contains pointers if its element type does. */
- return contains_pointers_p (TREE_TYPE (type));
-
- default:
- return 0;
- }
-}
-
-/* In unit-at-a-time mode, 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. */
-static GTY(()) tree pending_assemble_externals;
-
-#ifdef ASM_OUTPUT_EXTERNAL
-/* 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. */
-
-static bool
-incorporeal_function_p (tree decl)
-{
- if (TREE_CODE (decl) == FUNCTION_DECL && DECL_BUILT_IN (decl))
- {
- const char *name;
-
- if (DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL
- && DECL_FUNCTION_CODE (decl) == BUILT_IN_ALLOCA)
- return true;
-
- name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
- if (strncmp (name, "__builtin_", strlen ("__builtin_")) == 0)
- return true;
- }
- return false;
-}
-
-/* Actually do the tests to determine if this is necessary, and invoke
- ASM_OUTPUT_EXTERNAL. */
-static void
-assemble_external_real (tree decl)
-{
- rtx rtl = DECL_RTL (decl);
-
- if (MEM_P (rtl) && GET_CODE (XEXP (rtl, 0)) == SYMBOL_REF
- && !SYMBOL_REF_USED (XEXP (rtl, 0))
- && !incorporeal_function_p (decl))
- {
- /* Some systems do require some output. */
- SYMBOL_REF_USED (XEXP (rtl, 0)) = 1;
- ASM_OUTPUT_EXTERNAL (asm_out_file, decl, XSTR (XEXP (rtl, 0), 0));
- }
-}
-#endif
-
-void
-process_pending_assemble_externals (void)
-{
-#ifdef ASM_OUTPUT_EXTERNAL
- tree list;
- for (list = pending_assemble_externals; list; list = TREE_CHAIN (list))
- assemble_external_real (TREE_VALUE (list));
-
- pending_assemble_externals = 0;
-#endif
-}
-
-/* Output something to declare an external symbol to the assembler.
- (Most assemblers don't need this, so we normally output nothing.)
- Do nothing if DECL is not external. */
-
-void
-assemble_external (tree decl ATTRIBUTE_UNUSED)
-{
- /* Because most platforms do not define ASM_OUTPUT_EXTERNAL, the
- main body of this code is only rarely exercised. To provide some
- testing, on all platforms, we make sure that the ASM_OUT_FILE is
- open. If it's not, we should not be calling this function. */
- gcc_assert (asm_out_file);
-
-#ifdef ASM_OUTPUT_EXTERNAL
- if (!DECL_P (decl) || !DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl))
- return;
-
- if (flag_unit_at_a_time)
- pending_assemble_externals = tree_cons (0, decl,
- pending_assemble_externals);
- else
- assemble_external_real (decl);
-#endif
-}
-
-/* Similar, for calling a library function FUN. */
-
-void
-assemble_external_libcall (rtx fun)
-{
- /* Declare library function name external when first used, if nec. */
- if (! SYMBOL_REF_USED (fun))
- {
- SYMBOL_REF_USED (fun) = 1;
- targetm.asm_out.external_libcall (fun);
- }
-}
-
-/* Assemble a label named NAME. */
-
-void
-assemble_label (const char *name)
-{
- ASM_OUTPUT_LABEL (asm_out_file, name);
-}
-
-/* Set the symbol_referenced flag for ID. */
-void
-mark_referenced (tree id)
-{
- TREE_SYMBOL_REFERENCED (id) = 1;
-}
-
-/* Set the symbol_referenced flag for DECL and notify callgraph. */
-void
-mark_decl_referenced (tree decl)
-{
- if (TREE_CODE (decl) == FUNCTION_DECL)
- {
- /* 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
- definition. */
- struct cgraph_node *node = cgraph_node (decl);
- if (!DECL_EXTERNAL (decl)
- && (!node->local.vtable_method || !cgraph_global_info_ready
- || !node->local.finalized))
- cgraph_mark_needed_node (node);
- }
- else if (TREE_CODE (decl) == VAR_DECL)
- {
- struct cgraph_varpool_node *node = cgraph_varpool_node (decl);
- cgraph_varpool_mark_needed_node (node);
- /* C++ frontend use mark_decl_references to force COMDAT variables
- to be output that might appear dead otherwise. */
- node->force_output = true;
- }
- /* else do nothing - we can get various sorts of CST nodes here,
- which do not need to be marked. */
-}
-
-
-/* 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
- chain. */
-
-static inline tree
-ultimate_transparent_alias_target (tree *alias)
-{
- tree target = *alias;
-
- if (IDENTIFIER_TRANSPARENT_ALIAS (target))
- {
- gcc_assert (TREE_CHAIN (target));
- target = ultimate_transparent_alias_target (&TREE_CHAIN (target));
- gcc_assert (! IDENTIFIER_TRANSPARENT_ALIAS (target)
- && ! TREE_CHAIN (target));
- *alias = target;
- }
-
- return target;
-}
-
-/* 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). */
-
-void
-assemble_name_raw (FILE *file, const char *name)
-{
- if (name[0] == '*')
- fputs (&name[1], file);
- else
- ASM_OUTPUT_LABELREF (file, 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 (FILE *file, const char *name)
-{
- const char *real_name;
- tree id;
-
- real_name = targetm.strip_name_encoding (name);
-
- id = maybe_get_identifier (real_name);
- if (id)
- {
- tree id_orig = id;
-
- mark_referenced (id);
- ultimate_transparent_alias_target (&id);
- if (id != id_orig)
- name = IDENTIFIER_POINTER (id);
- gcc_assert (! TREE_CHAIN (id));
- }
-
- assemble_name_raw (file, name);
-}
-
-/* Allocate SIZE bytes writable static space with a gensym name
- and return an RTX to refer to its address. */
-
-rtx
-assemble_static_space (unsigned HOST_WIDE_INT size)
-{
- char name[12];
- const char *namestring;
- rtx x;
-
- ASM_GENERATE_INTERNAL_LABEL (name, "LF", const_labelno);
- ++const_labelno;
- namestring = ggc_strdup (name);
-
- x = gen_rtx_SYMBOL_REF (Pmode, namestring);
- SYMBOL_REF_FLAGS (x) = SYMBOL_FLAG_LOCAL;
-
-#ifdef ASM_OUTPUT_ALIGNED_DECL_LOCAL
- ASM_OUTPUT_ALIGNED_DECL_LOCAL (asm_out_file, NULL_TREE, name, size,
- BIGGEST_ALIGNMENT);
-#else
-#ifdef ASM_OUTPUT_ALIGNED_LOCAL
- ASM_OUTPUT_ALIGNED_LOCAL (asm_out_file, name, size, BIGGEST_ALIGNMENT);
-#else
- {
- /* 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. */
- unsigned HOST_WIDE_INT rounded ATTRIBUTE_UNUSED
- = ((size + (BIGGEST_ALIGNMENT / BITS_PER_UNIT) - 1)
- / (BIGGEST_ALIGNMENT / BITS_PER_UNIT)
- * (BIGGEST_ALIGNMENT / BITS_PER_UNIT));
- ASM_OUTPUT_LOCAL (asm_out_file, name, size, rounded);
- }
-#endif
-#endif
- return x;
-}
-
-/* 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. */
-
-static GTY(()) rtx initial_trampoline;
-
-#ifdef TRAMPOLINE_TEMPLATE
-rtx
-assemble_trampoline_template (void)
-{
- char label[256];
- const char *name;
- int align;
- rtx symbol;
-
- if (initial_trampoline)
- return initial_trampoline;
-
- /* By default, put trampoline templates in read-only data section. */
-
-#ifdef TRAMPOLINE_SECTION
- switch_to_section (TRAMPOLINE_SECTION);
-#else
- switch_to_section (readonly_data_section);
-#endif
-
- /* Write the assembler code to define one. */
- align = floor_log2 (TRAMPOLINE_ALIGNMENT / BITS_PER_UNIT);
- if (align > 0)
- {
- ASM_OUTPUT_ALIGN (asm_out_file, align);
- }
-
- targetm.asm_out.internal_label (asm_out_file, "LTRAMP", 0);
- TRAMPOLINE_TEMPLATE (asm_out_file);
-
- /* Record the rtl to refer to it. */
- ASM_GENERATE_INTERNAL_LABEL (label, "LTRAMP", 0);
- name = ggc_strdup (label);
- symbol = gen_rtx_SYMBOL_REF (Pmode, name);
- SYMBOL_REF_FLAGS (symbol) = SYMBOL_FLAG_LOCAL;
-
- initial_trampoline = gen_rtx_MEM (BLKmode, symbol);
- set_mem_align (initial_trampoline, TRAMPOLINE_ALIGNMENT);
-
- return initial_trampoline;
-}
-#endif
-
-/* A and B are either alignments or offsets. Return the minimum alignment
- that may be assumed after adding the two together. */
-
-static inline unsigned
-min_align (unsigned int a, unsigned int b)
-{
- return (a | b) & -(a | b);
-}
-
-/* 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. */
-
-const char *
-integer_asm_op (int size, int aligned_p)
-{
- struct asm_int_op *ops;
-
- if (aligned_p)
- ops = &targetm.asm_out.aligned_op;
- else
- ops = &targetm.asm_out.unaligned_op;
-
- switch (size)
- {
- case 1:
- return targetm.asm_out.byte_op;
- case 2:
- return ops->hi;
- case 4:
- return ops->si;
- case 8:
- return ops->di;
- case 16:
- return ops->ti;
- default:
- return NULL;
- }
-}
-
-/* Use directive OP to assemble an integer object X. Print OP at the
- start of the line, followed immediately by the value of X. */
-
-void
-assemble_integer_with_op (const char *op, rtx x)
-{
- fputs (op, asm_out_file);
- output_addr_const (asm_out_file, x);
- fputc ('\n', asm_out_file);
-}
-
-/* The default implementation of the asm_out.integer target hook. */
-
-bool
-default_assemble_integer (rtx x ATTRIBUTE_UNUSED,
- unsigned int size ATTRIBUTE_UNUSED,
- int aligned_p ATTRIBUTE_UNUSED)
-{
- const char *op = integer_asm_op (size, aligned_p);
- /* Avoid GAS bugs for large values. Specifically negative values whose
- absolute value fits in a bfd_vma, but not in a bfd_signed_vma. */
- if (size > UNITS_PER_WORD && size > POINTER_SIZE / BITS_PER_UNIT)
- return false;
- return op && (assemble_integer_with_op (op, x), true);
-}
-
-/* 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. */
-
-bool
-assemble_integer (rtx x, unsigned int size, unsigned int align, int force)
-{
- int aligned_p;
-
- aligned_p = (align >= MIN (size * BITS_PER_UNIT, BIGGEST_ALIGNMENT));
-
- /* See if the target hook can handle this kind of object. */
- if (targetm.asm_out.integer (x, size, aligned_p))
- return true;
-
- /* 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 (size > 1)
- {
- enum machine_mode omode, imode;
- unsigned int subalign;
- unsigned int subsize, i;
-
- subsize = size > UNITS_PER_WORD? UNITS_PER_WORD : 1;
- subalign = MIN (align, subsize * BITS_PER_UNIT);
- omode = mode_for_size (subsize * BITS_PER_UNIT, MODE_INT, 0);
- imode = mode_for_size (size * BITS_PER_UNIT, MODE_INT, 0);
-
- for (i = 0; i < size; i += subsize)
- {
- rtx partial = simplify_subreg (omode, x, imode, i);
- if (!partial || !assemble_integer (partial, subsize, subalign, 0))
- break;
- }
- if (i == size)
- return true;
-
- /* If we've printed some of it, but not all of it, there's no going
- back now. */
- gcc_assert (!i);
- }
-
- gcc_assert (!force);
-
- return false;
-}
-
-void
-assemble_real (REAL_VALUE_TYPE d, enum machine_mode mode, unsigned int align)
-{
- long data[4] = {0, 0, 0, 0};
- int i;
- int bitsize, nelts, nunits, units_per;
-
- /* 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. */
-
- nunits = GET_MODE_SIZE (mode);
- bitsize = nunits * BITS_PER_UNIT;
- nelts = CEIL (bitsize, 32);
- units_per = 32 / BITS_PER_UNIT;
-
- real_to_target (data, &d, mode);
-
- /* Put out the first word with the specified alignment. */
- assemble_integer (GEN_INT (data[0]), MIN (nunits, units_per), align, 1);
- nunits -= units_per;
-
- /* Subsequent words need only 32-bit alignment. */
- align = min_align (align, 32);
-
- for (i = 1; i < nelts; i++)
- {
- assemble_integer (GEN_INT (data[i]), MIN (nunits, units_per), align, 1);
- nunits -= units_per;
- }
-}
-
-/* Given an expression EXP with a constant value,
- reduce it to the sum of an assembler symbol and an integer.
- Store them both in the structure *VALUE.
- EXP must be reducible. */
-
-struct addr_const GTY(())
-{
- rtx base;
- HOST_WIDE_INT offset;
-};
-
-static void
-decode_addr_const (tree exp, struct addr_const *value)
-{
- tree target = TREE_OPERAND (exp, 0);
- int offset = 0;
- /* APPLE LOCAL begin handle CONST_DECLs 5494472 */
- rtx x = NULL_RTX;
-
- if (TREE_CODE (target) == CONST_DECL)
- target = DECL_INITIAL (target);
- /* APPLE LOCAL end handle CONST_DECLs 5494472 */
-
- while (1)
- {
- if (TREE_CODE (target) == COMPONENT_REF
- && host_integerp (byte_position (TREE_OPERAND (target, 1)), 0))
-
- {
- offset += int_byte_position (TREE_OPERAND (target, 1));
- target = TREE_OPERAND (target, 0);
- }
- else if (TREE_CODE (target) == ARRAY_REF
- || TREE_CODE (target) == ARRAY_RANGE_REF)
- {
- offset += (tree_low_cst (TYPE_SIZE_UNIT (TREE_TYPE (target)), 1)
- * tree_low_cst (TREE_OPERAND (target, 1), 0));
- target = TREE_OPERAND (target, 0);
- }
- else
- break;
- }
-
- switch (TREE_CODE (target))
- {
- case VAR_DECL:
- case FUNCTION_DECL:
- x = DECL_RTL (target);
- break;
-
- case LABEL_DECL:
- x = gen_rtx_MEM (FUNCTION_MODE,
- gen_rtx_LABEL_REF (Pmode, force_label_rtx (target)));
- break;
-
- case REAL_CST:
- case STRING_CST:
- case COMPLEX_CST:
- case CONSTRUCTOR:
- case INTEGER_CST:
- x = output_constant_def (target, 1);
- break;
-
- default:
- gcc_unreachable ();
- }
-
- gcc_assert (MEM_P (x));
- x = XEXP (x, 0);
-
- value->base = x;
- value->offset = offset;
-}
-
-/* Uniquize all constants that appear in memory.
- Each constant in memory thus far output is recorded
- in `const_desc_table'. */
-
-struct constant_descriptor_tree GTY(())
-{
- /* A MEM for the constant. */
- rtx rtl;
-
- /* The value of the constant. */
- tree value;
-
- /* Hash of value. Computing the hash from value each time
- hashfn is called can't work properly, as that means recursive
- use of the hash table during hash table expansion. */
- hashval_t hash;
-};
-
-static GTY((param_is (struct constant_descriptor_tree)))
- htab_t const_desc_htab;
-
-static struct constant_descriptor_tree * build_constant_desc (tree);
-static void maybe_output_constant_def_contents (struct constant_descriptor_tree *, int);
-
-/* Compute a hash code for a constant expression. */
-
-static hashval_t
-const_desc_hash (const void *ptr)
-{
- return ((struct constant_descriptor_tree *)ptr)->hash;
-}
-
-/* APPLE LOCAL begin fwritable strings */
-#if defined(TARGET_MACHO)
- #if (TARGET_MACHO == 0)
- #define darwin_constant_cfstring_p(X) (0)
- #endif
-#else
- #define darwin_constant_cfstring_p(X) (0)
-#endif
-/* APPLE LOCAL end fwritable strings */
-
-
-static hashval_t
-const_hash_1 (const tree exp)
-{
- const char *p;
- hashval_t hi;
- int len, i;
- enum tree_code code = TREE_CODE (exp);
-
- /* Either set P and LEN to the address and len of something to hash and
- exit the switch or return a value. */
-
- switch (code)
- {
- case INTEGER_CST:
- p = (char *) &TREE_INT_CST (exp);
- len = sizeof TREE_INT_CST (exp);
- break;
-
- case REAL_CST:
- return real_hash (TREE_REAL_CST_PTR (exp));
-
- case STRING_CST:
- /* APPLE LOCAL begin fwritable strings */
- if (flag_writable_strings
- && !darwin_constant_cfstring_p (exp))
- {
- p = (char *) &exp;
- len = sizeof exp;
- }
- else
- {
- p = TREE_STRING_POINTER (exp);
- len = TREE_STRING_LENGTH (exp);
- }
- /* APPLE LOCAL end fwritable strings */
- break;
-
- case COMPLEX_CST:
- return (const_hash_1 (TREE_REALPART (exp)) * 5
- + const_hash_1 (TREE_IMAGPART (exp)));
-
- case CONSTRUCTOR:
- {
- unsigned HOST_WIDE_INT idx;
- tree value;
-
- hi = 5 + int_size_in_bytes (TREE_TYPE (exp));
-
- FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (exp), idx, value)
- if (value)
- hi = hi * 603 + const_hash_1 (value);
-
- return hi;
- }
-
- case ADDR_EXPR:
- case FDESC_EXPR:
- {
- struct addr_const value;
-
- decode_addr_const (exp, &value);
- switch (GET_CODE (value.base))
- {
- case SYMBOL_REF:
- /* Don't hash the address of the SYMBOL_REF;
- only use the offset and the symbol name. */
- hi = value.offset;
- p = XSTR (value.base, 0);
- for (i = 0; p[i] != 0; i++)
- hi = ((hi * 613) + (unsigned) (p[i]));
- break;
-
- case LABEL_REF:
- hi = value.offset + CODE_LABEL_NUMBER (XEXP (value.base, 0)) * 13;
- break;
-
- default:
- gcc_unreachable ();
- }
- }
- return hi;
-
- case PLUS_EXPR:
- case MINUS_EXPR:
- return (const_hash_1 (TREE_OPERAND (exp, 0)) * 9
- + const_hash_1 (TREE_OPERAND (exp, 1)));
-
- case NOP_EXPR:
- case CONVERT_EXPR:
- case NON_LVALUE_EXPR:
- return const_hash_1 (TREE_OPERAND (exp, 0)) * 7 + 2;
-
- default:
- /* A language specific constant. Just hash the code. */
- return code;
- }
-
- /* Compute hashing function. */
- hi = len;
- for (i = 0; i < len; i++)
- hi = ((hi * 613) + (unsigned) (p[i]));
-
- return hi;
-}
-
-/* Wrapper of compare_constant, for the htab interface. */
-static int
-const_desc_eq (const void *p1, const void *p2)
-{
- const struct constant_descriptor_tree *c1 = p1;
- const struct constant_descriptor_tree *c2 = p2;
- if (c1->hash != c2->hash)
- return 0;
- return compare_constant (c1->value, c2->value);
-}
-
-/* Compare t1 and t2, and return 1 only if they are known to result in
- the same bit pattern on output. */
-
-static int
-compare_constant (const tree t1, const tree t2)
-{
- enum tree_code typecode;
-
- if (t1 == NULL_TREE)
- return t2 == NULL_TREE;
- if (t2 == NULL_TREE)
- return 0;
-
- if (TREE_CODE (t1) != TREE_CODE (t2))
- return 0;
-
- switch (TREE_CODE (t1))
- {
- case INTEGER_CST:
- /* Integer constants are the same only if the same width of type. */
- if (TYPE_PRECISION (TREE_TYPE (t1)) != TYPE_PRECISION (TREE_TYPE (t2)))
- return 0;
- if (TYPE_MODE (TREE_TYPE (t1)) != TYPE_MODE (TREE_TYPE (t2)))
- return 0;
- return tree_int_cst_equal (t1, t2);
-
- case REAL_CST:
- /* Real constants are the same only if the same width of type. */
- if (TYPE_PRECISION (TREE_TYPE (t1)) != TYPE_PRECISION (TREE_TYPE (t2)))
- return 0;
-
- return REAL_VALUES_IDENTICAL (TREE_REAL_CST (t1), TREE_REAL_CST (t2));
-
- case STRING_CST:
- /* APPLE LOCAL begin fwritable strings */
- if (flag_writable_strings
- && !darwin_constant_cfstring_p (t1)
- && !darwin_constant_cfstring_p (t2))
- return t1 == t2;
- /* APPLE LOCAL end fwritable strings */
-
- if (TYPE_MODE (TREE_TYPE (t1)) != TYPE_MODE (TREE_TYPE (t2)))
- return 0;
-
- return (TREE_STRING_LENGTH (t1) == TREE_STRING_LENGTH (t2)
- && ! memcmp (TREE_STRING_POINTER (t1), TREE_STRING_POINTER (t2),
- TREE_STRING_LENGTH (t1)));
-
- case COMPLEX_CST:
- return (compare_constant (TREE_REALPART (t1), TREE_REALPART (t2))
- && compare_constant (TREE_IMAGPART (t1), TREE_IMAGPART (t2)));
-
- case CONSTRUCTOR:
- {
- VEC(constructor_elt, gc) *v1, *v2;
- unsigned HOST_WIDE_INT idx;
-
- typecode = TREE_CODE (TREE_TYPE (t1));
- if (typecode != TREE_CODE (TREE_TYPE (t2)))
- return 0;
-
- if (typecode == ARRAY_TYPE)
- {
- HOST_WIDE_INT size_1 = int_size_in_bytes (TREE_TYPE (t1));
- /* For arrays, check that the sizes all match. */
- if (TYPE_MODE (TREE_TYPE (t1)) != TYPE_MODE (TREE_TYPE (t2))
- || size_1 == -1
- || size_1 != int_size_in_bytes (TREE_TYPE (t2)))
- return 0;
- }
- else
- {
- /* For record and union constructors, require exact type
- equality. */
- if (TREE_TYPE (t1) != TREE_TYPE (t2))
- return 0;
- }
-
- v1 = CONSTRUCTOR_ELTS (t1);
- v2 = CONSTRUCTOR_ELTS (t2);
- if (VEC_length (constructor_elt, v1)
- != VEC_length (constructor_elt, v2))
- return 0;
-
- for (idx = 0; idx < VEC_length (constructor_elt, v1); ++idx)
- {
- constructor_elt *c1 = VEC_index (constructor_elt, v1, idx);
- constructor_elt *c2 = VEC_index (constructor_elt, v2, idx);
-
- /* Check that each value is the same... */
- if (!compare_constant (c1->value, c2->value))
- return 0;
- /* ... and that they apply to the same fields! */
- if (typecode == ARRAY_TYPE)
- {
- if (!compare_constant (c1->index, c2->index))
- return 0;
- }
- else
- {
- if (c1->index != c2->index)
- return 0;
- }
- }
-
- return 1;
- }
-
- case ADDR_EXPR:
- case FDESC_EXPR:
- {
- struct addr_const value1, value2;
-
- decode_addr_const (t1, &value1);
- decode_addr_const (t2, &value2);
- return (value1.offset == value2.offset
- && strcmp (XSTR (value1.base, 0), XSTR (value2.base, 0)) == 0);
- }
-
- case PLUS_EXPR:
- case MINUS_EXPR:
- case RANGE_EXPR:
- return (compare_constant (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0))
- && compare_constant(TREE_OPERAND (t1, 1), TREE_OPERAND (t2, 1)));
-
- case NOP_EXPR:
- case CONVERT_EXPR:
- case NON_LVALUE_EXPR:
- case VIEW_CONVERT_EXPR:
- return compare_constant (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0));
-
- default:
- {
- tree nt1, nt2;
- nt1 = lang_hooks.expand_constant (t1);
- nt2 = lang_hooks.expand_constant (t2);
- if (nt1 != t1 || nt2 != t2)
- return compare_constant (nt1, nt2);
- else
- return 0;
- }
- }
-
- gcc_unreachable ();
-}
-
-/* Make a copy of the whole tree structure for a constant. This
- handles the same types of nodes that compare_constant handles. */
-
-static tree
-copy_constant (tree exp)
-{
- switch (TREE_CODE (exp))
- {
- case ADDR_EXPR:
- /* For ADDR_EXPR, we do not want to copy the decl whose address
- is requested. We do want to copy constants though. */
- if (CONSTANT_CLASS_P (TREE_OPERAND (exp, 0)))
- return build1 (TREE_CODE (exp), TREE_TYPE (exp),
- copy_constant (TREE_OPERAND (exp, 0)));
- else
- return copy_node (exp);
-
- case INTEGER_CST:
- case REAL_CST:
- case STRING_CST:
- return copy_node (exp);
-
- case COMPLEX_CST:
- return build_complex (TREE_TYPE (exp),
- copy_constant (TREE_REALPART (exp)),
- copy_constant (TREE_IMAGPART (exp)));
-
- case PLUS_EXPR:
- case MINUS_EXPR:
- return build2 (TREE_CODE (exp), TREE_TYPE (exp),
- copy_constant (TREE_OPERAND (exp, 0)),
- copy_constant (TREE_OPERAND (exp, 1)));
-
- case NOP_EXPR:
- case CONVERT_EXPR:
- case NON_LVALUE_EXPR:
- case VIEW_CONVERT_EXPR:
- return build1 (TREE_CODE (exp), TREE_TYPE (exp),
- copy_constant (TREE_OPERAND (exp, 0)));
-
- case CONSTRUCTOR:
- {
- tree copy = copy_node (exp);
- VEC(constructor_elt, gc) *v;
- unsigned HOST_WIDE_INT idx;
- tree purpose, value;
-
- v = VEC_alloc(constructor_elt, gc, VEC_length(constructor_elt,
- CONSTRUCTOR_ELTS (exp)));
- FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (exp), idx, purpose, value)
- {
- constructor_elt *ce = VEC_quick_push (constructor_elt, v, NULL);
- ce->index = purpose;
- ce->value = copy_constant (value);
- }
- CONSTRUCTOR_ELTS (copy) = v;
- return copy;
- }
-
- default:
- {
- tree t = lang_hooks.expand_constant (exp);
-
- gcc_assert (t != exp);
- return copy_constant (t);
- }
- }
-}
-
-/* Return the alignment of constant EXP in bits. */
-
-static unsigned int
-get_constant_alignment (tree exp)
-{
- unsigned int align;
-
- align = TYPE_ALIGN (TREE_TYPE (exp));
-#ifdef CONSTANT_ALIGNMENT
- align = CONSTANT_ALIGNMENT (exp, align);
-#endif
- return align;
-}
-
-/* Return the section into which constant EXP should be placed. */
-
-static section *
-get_constant_section (tree exp)
-{
- if (IN_NAMED_SECTION (exp))
- return get_named_section (exp, NULL, compute_reloc_for_constant (exp));
- else
- return targetm.asm_out.select_section (exp,
- compute_reloc_for_constant (exp),
- get_constant_alignment (exp));
-}
-
-/* Return the size of constant EXP in bytes. */
-
-static HOST_WIDE_INT
-get_constant_size (tree exp)
-{
- HOST_WIDE_INT size;
-
- size = int_size_in_bytes (TREE_TYPE (exp));
- if (TREE_CODE (exp) == STRING_CST)
- size = MAX (TREE_STRING_LENGTH (exp), size);
- return size;
-}
-
-/* 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. */
-
-static struct constant_descriptor_tree *
-build_constant_desc (tree exp)
-{
- rtx symbol;
- rtx rtl;
- char label[256];
- int labelno;
- struct constant_descriptor_tree *desc;
-
- desc = ggc_alloc (sizeof (*desc));
- /* APPLE LOCAL begin fwritable strings */
- if (flag_writable_strings && TREE_CODE (exp) == STRING_CST)
- desc->value = exp;
- else
- desc->value = copy_constant (exp);
- /* APPLE LOCAL end fwritable strings */
-
- /* Propagate marked-ness to copied constant. */
- if (flag_mudflap && mf_marked_p (exp))
- mf_mark (desc->value);
-
- /* Create a string containing the label name, in LABEL. */
- labelno = const_labelno++;
- /* APPLE LOCAL begin radar 6243961 */
- if (flag_writable_strings && TREE_CODE (exp) == STRING_CST)
- ASM_GENERATE_INTERNAL_LABEL (label, "lC", labelno);
- else
- ASM_GENERATE_INTERNAL_LABEL (label, "LC", labelno);
- /* APPLE LOCAL end radar 6243961 */
-
- /* We have a symbol name; construct the SYMBOL_REF and the MEM. */
- if (use_object_blocks_p ())
- {
- section *sect = get_constant_section (exp);
- symbol = create_block_symbol (ggc_strdup (label),
- get_block_for_section (sect), -1);
- }
- else
- symbol = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (label));
- SYMBOL_REF_FLAGS (symbol) |= SYMBOL_FLAG_LOCAL;
- SET_SYMBOL_REF_DECL (symbol, desc->value);
- TREE_CONSTANT_POOL_ADDRESS_P (symbol) = 1;
-
- rtl = gen_rtx_MEM (TYPE_MODE (TREE_TYPE (exp)), symbol);
- set_mem_attributes (rtl, exp, 1);
- set_mem_alias_set (rtl, 0);
- set_mem_alias_set (rtl, const_alias_set);
-
- /* 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. */
-
- targetm.encode_section_info (exp, rtl, true);
-
- desc->rtl = rtl;
-
- return desc;
-}
-
-/* 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. */
-
-rtx
-output_constant_def (tree exp, int defer)
-{
- struct constant_descriptor_tree *desc;
- struct constant_descriptor_tree key;
- void **loc;
-
- /* APPLE LOCAL begin radar 6243961 */
- int save_flag_writable_strings = flag_writable_strings;
- if (flag_writable_strings && TREE_CODE (exp) == STRING_CST
- && darwin_constant_cfstring_p (exp))
- flag_writable_strings = 0;
- /* APPLE LOCAL end radar 6243961 */
- /* Look up EXP in the table of constant descriptors. If we didn't find
- it, create a new one. */
- key.value = exp;
- key.hash = const_hash_1 (exp);
- loc = htab_find_slot_with_hash (const_desc_htab, &key, key.hash, INSERT);
-
- desc = *loc;
- if (desc == 0)
- {
- desc = build_constant_desc (exp);
- desc->hash = key.hash;
- *loc = desc;
- }
-
- maybe_output_constant_def_contents (desc, defer);
- /* APPLE LOCAL radar 6243961 */
- flag_writable_strings = save_flag_writable_strings;
- return desc->rtl;
-}
-
-/* Subroutine of output_constant_def: Decide whether or not we need to
- output the constant DESC now, and if so, do it. */
-static void
-maybe_output_constant_def_contents (struct constant_descriptor_tree *desc,
- int defer)
-{
- rtx symbol = XEXP (desc->rtl, 0);
- tree exp = desc->value;
-
- if (flag_syntax_only)
- return;
-
- if (TREE_ASM_WRITTEN (exp))
- /* Already output; don't do it again. */
- return;
-
- /* APPLE LOCAL begin fwritable strings */
- /* The only constants that cannot safely be deferred, assuming the
- context allows it, are strings under flag_writable_strings. */
- if (defer && (TREE_CODE (exp) != STRING_CST || !flag_writable_strings))
- /* APPLE LOCAL end fwritable strings */
- {
- /* 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. */
- if (cfun)
- n_deferred_constants++;
- return;
- }
-
- output_constant_def_contents (symbol);
-}
-
-/* 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. */
-
-static void
-assemble_constant_contents (tree exp, const char *label, unsigned int align)
-{
- HOST_WIDE_INT size;
-
- size = get_constant_size (exp);
-
- /* Do any machine/system dependent processing of the constant. */
-#ifdef ASM_DECLARE_CONSTANT_NAME
- ASM_DECLARE_CONSTANT_NAME (asm_out_file, label, exp, size);
-#else
- /* Standard thing is just output label for the constant. */
- ASM_OUTPUT_LABEL (asm_out_file, label);
-#endif /* ASM_DECLARE_CONSTANT_NAME */
-
- /* Output the value of EXP. */
- output_constant (exp, size, align);
-}
-
-/* We must output the constant data referred to by SYMBOL; do so. */
-
-static void
-output_constant_def_contents (rtx symbol)
-{
- tree exp = SYMBOL_REF_DECL (symbol);
- unsigned int align;
-
- /* Make sure any other constants whose addresses appear in EXP
- are assigned label numbers. */
- output_addressed_constants (exp);
-
- /* We are no longer deferring this constant. */
- TREE_ASM_WRITTEN (exp) = 1;
-
- /* 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. */
- if (SYMBOL_REF_HAS_BLOCK_INFO_P (symbol) && SYMBOL_REF_BLOCK (symbol))
- place_block_symbol (symbol);
- else
- {
- switch_to_section (get_constant_section (exp));
- align = get_constant_alignment (exp);
- if (align > BITS_PER_UNIT)
- ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (align / BITS_PER_UNIT));
- assemble_constant_contents (exp, XSTR (symbol, 0), align);
- }
- if (flag_mudflap)
- mudflap_enqueue_constant (exp);
-}
-
-/* Look up EXP in the table of constant descriptors. Return the rtl
- if it has been emitted, else null. */
-
-rtx
-lookup_constant_def (tree exp)
-{
- struct constant_descriptor_tree *desc;
- struct constant_descriptor_tree key;
-
- key.value = exp;
- key.hash = const_hash_1 (exp);
- desc = htab_find_with_hash (const_desc_htab, &key, key.hash);
-
- return (desc ? desc->rtl : NULL_RTX);
-}
-
-/* Used in the hash tables to avoid outputting the same constant
- twice. Unlike 'struct constant_descriptor_tree', RTX constants
- are output once per function, not once per file. */
-/* ??? Only a few targets need per-function constant pools. Most
- can use one per-file pool. Should add a targetm bit to tell the
- difference. */
-
-struct rtx_constant_pool GTY(())
-{
- /* Pointers to first and last constant in pool, as ordered by offset. */
- struct constant_descriptor_rtx *first;
- struct constant_descriptor_rtx *last;
-
- /* Hash facility for making memory-constants from constant rtl-expressions.
- It is used on RISC machines where immediate integer arguments and
- constant addresses are restricted so that such constants must be stored
- in memory. */
- htab_t GTY((param_is (struct constant_descriptor_rtx))) const_rtx_htab;
-
- /* Current offset in constant pool (does not include any
- machine-specific header). */
- HOST_WIDE_INT offset;
-};
-
-struct constant_descriptor_rtx GTY((chain_next ("%h.next")))
-{
- struct constant_descriptor_rtx *next;
- rtx mem;
- rtx sym;
- rtx constant;
- HOST_WIDE_INT offset;
- hashval_t hash;
- enum machine_mode mode;
- unsigned int align;
- int labelno;
- int mark;
-};
-
-/* Hash and compare functions for const_rtx_htab. */
-
-static hashval_t
-const_desc_rtx_hash (const void *ptr)
-{
- const struct constant_descriptor_rtx *desc = ptr;
- return desc->hash;
-}
-
-static int
-const_desc_rtx_eq (const void *a, const void *b)
-{
- const struct constant_descriptor_rtx *x = a;
- const struct constant_descriptor_rtx *y = b;
-
- if (x->mode != y->mode)
- return 0;
- return rtx_equal_p (x->constant, y->constant);
-}
-
-/* This is the worker function for const_rtx_hash, called via for_each_rtx. */
-
-static int
-const_rtx_hash_1 (rtx *xp, void *data)
-{
- unsigned HOST_WIDE_INT hwi;
- enum machine_mode mode;
- enum rtx_code code;
- hashval_t h, *hp;
- rtx x;
-
- x = *xp;
- code = GET_CODE (x);
- mode = GET_MODE (x);
- h = (hashval_t) code * 1048573 + mode;
-
- switch (code)
- {
- case CONST_INT:
- hwi = INTVAL (x);
- fold_hwi:
- {
- const int shift = sizeof (hashval_t) * CHAR_BIT;
- const int n = sizeof (HOST_WIDE_INT) / sizeof (hashval_t);
- int i;
-
- h ^= (hashval_t) hwi;
- for (i = 1; i < n; ++i)
- {
- hwi >>= shift;
- h ^= (hashval_t) hwi;
- }
- }
- break;
-
- case CONST_DOUBLE:
- if (mode == VOIDmode)
- {
- hwi = CONST_DOUBLE_LOW (x) ^ CONST_DOUBLE_HIGH (x);
- goto fold_hwi;
- }
- else
- h ^= real_hash (CONST_DOUBLE_REAL_VALUE (x));
- break;
-
- case CONST_VECTOR:
- {
- int i;
- for (i = XVECLEN (x, 0); i-- > 0; )
- h = h * 251 + const_rtx_hash_1 (&XVECEXP (x, 0, i), data);
- }
- break;
-
- case SYMBOL_REF:
- h ^= htab_hash_string (XSTR (x, 0));
- break;
-
- case LABEL_REF:
- h = h * 251 + CODE_LABEL_NUMBER (XEXP (x, 0));
- break;
-
- case UNSPEC:
- case UNSPEC_VOLATILE:
- h = h * 251 + XINT (x, 1);
- break;
-
- default:
- break;
- }
-
- hp = data;
- *hp = *hp * 509 + h;
- return 0;
-}
-
-/* Compute a hash value for X, which should be a constant. */
-
-static hashval_t
-const_rtx_hash (rtx x)
-{
- hashval_t h = 0;
- for_each_rtx (&x, const_rtx_hash_1, &h);
- return h;
-}
-
-
-/* Create and return a new rtx constant pool. */
-
-static struct rtx_constant_pool *
-create_constant_pool (void)
-{
- struct rtx_constant_pool *pool;
-
- pool = ggc_alloc (sizeof (struct rtx_constant_pool));
- pool->const_rtx_htab = htab_create_ggc (31, const_desc_rtx_hash,
- const_desc_rtx_eq, NULL);
- pool->first = NULL;
- pool->last = NULL;
- pool->offset = 0;
- return pool;
-}
-
-/* Initialize constant pool hashing for a new function. */
-
-void
-init_varasm_status (struct function *f)
-{
- struct varasm_status *p;
-
- p = ggc_alloc (sizeof (struct varasm_status));
- f->varasm = p;
-
- p->pool = create_constant_pool ();
- p->deferred_constants = 0;
-}
-
-/* Given a MINUS expression, simplify it if both sides
- include the same symbol. */
-
-rtx
-simplify_subtraction (rtx x)
-{
- rtx r = simplify_rtx (x);
- return r ? r : x;
-}
-
-/* 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. */
-
-rtx
-force_const_mem (enum machine_mode mode, rtx x)
-{
- struct constant_descriptor_rtx *desc, tmp;
- struct rtx_constant_pool *pool;
- char label[256];
- rtx def, symbol;
- hashval_t hash;
- unsigned int align;
- void **slot;
-
- /* If we're not allowed to drop X into the constant pool, don't. */
- if (targetm.cannot_force_const_mem (x))
- return NULL_RTX;
-
- /* Record that this function has used a constant pool entry. */
- current_function_uses_const_pool = 1;
-
- /* Decide which pool to use. */
- pool = (targetm.use_blocks_for_constant_p (mode, x)
- ? shared_constant_pool
- : cfun->varasm->pool);
-
- /* Lookup the value in the hashtable. */
- tmp.constant = x;
- tmp.mode = mode;
- hash = const_rtx_hash (x);
- slot = htab_find_slot_with_hash (pool->const_rtx_htab, &tmp, hash, INSERT);
- desc = *slot;
-
- /* If the constant was already present, return its memory. */
- if (desc)
- return copy_rtx (desc->mem);
-
- /* Otherwise, create a new descriptor. */
- desc = ggc_alloc (sizeof (*desc));
- *slot = desc;
-
- /* Align the location counter as required by EXP's data type. */
- align = GET_MODE_ALIGNMENT (mode == VOIDmode ? word_mode : mode);
-#ifdef CONSTANT_ALIGNMENT
- {
- tree type = lang_hooks.types.type_for_mode (mode, 0);
- if (type != NULL_TREE)
- align = CONSTANT_ALIGNMENT (make_tree (type, x), align);
- }
-#endif
-
- pool->offset += (align / BITS_PER_UNIT) - 1;
- pool->offset &= ~ ((align / BITS_PER_UNIT) - 1);
-
- desc->next = NULL;
- desc->constant = tmp.constant;
- desc->offset = pool->offset;
- desc->hash = hash;
- desc->mode = mode;
- desc->align = align;
- desc->labelno = const_labelno;
- desc->mark = 0;
-
- pool->offset += GET_MODE_SIZE (mode);
- if (pool->last)
- pool->last->next = desc;
- else
- pool->first = pool->last = desc;
- pool->last = desc;
-
- /* Create a string containing the label name, in LABEL. */
- ASM_GENERATE_INTERNAL_LABEL (label, "LC", const_labelno);
- ++const_labelno;
-
- /* Construct the SYMBOL_REF. Make sure to mark it as belonging to
- the constants pool. */
- if (use_object_blocks_p () && targetm.use_blocks_for_constant_p (mode, x))
- {
- section *sect = targetm.asm_out.select_rtx_section (mode, x, align);
- symbol = create_block_symbol (ggc_strdup (label),
- get_block_for_section (sect), -1);
- }
- else
- symbol = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (label));
- desc->sym = symbol;
- SYMBOL_REF_FLAGS (symbol) |= SYMBOL_FLAG_LOCAL;
- CONSTANT_POOL_ADDRESS_P (symbol) = 1;
- SET_SYMBOL_REF_CONSTANT (symbol, desc);
-
- /* Construct the MEM. */
- desc->mem = def = gen_const_mem (mode, symbol);
- set_mem_attributes (def, lang_hooks.types.type_for_mode (mode, 0), 1);
- set_mem_align (def, align);
-
- /* If we're dropping a label to the constant pool, make sure we
- don't delete it. */
- if (GET_CODE (x) == LABEL_REF)
- LABEL_PRESERVE_P (XEXP (x, 0)) = 1;
-
- return copy_rtx (def);
-}
-
-/* Given a constant pool SYMBOL_REF, return the corresponding constant. */
-
-rtx
-get_pool_constant (rtx addr)
-{
- return SYMBOL_REF_CONSTANT (addr)->constant;
-}
-
-/* Given a constant pool SYMBOL_REF, return the corresponding constant
- and whether it has been output or not. */
-
-rtx
-get_pool_constant_mark (rtx addr, bool *pmarked)
-{
- struct constant_descriptor_rtx *desc;
-
- desc = SYMBOL_REF_CONSTANT (addr);
- *pmarked = (desc->mark != 0);
- return desc->constant;
-}
-
-/* Similar, return the mode. */
-
-enum machine_mode
-get_pool_mode (rtx addr)
-{
- return SYMBOL_REF_CONSTANT (addr)->mode;
-}
-
-/* Return the size of the constant pool. */
-
-int
-get_pool_size (void)
-{
- return cfun->varasm->pool->offset;
-}
-
-/* Worker function for output_constant_pool_1. Emit assembly for X
- in MODE with known alignment ALIGN. */
-
-static void
-output_constant_pool_2 (enum machine_mode mode, rtx x, unsigned int align)
-{
- switch (GET_MODE_CLASS (mode))
- {
- case MODE_FLOAT:
- case MODE_DECIMAL_FLOAT:
- {
- REAL_VALUE_TYPE r;
-
- gcc_assert (GET_CODE (x) == CONST_DOUBLE);
- REAL_VALUE_FROM_CONST_DOUBLE (r, x);
- assemble_real (r, mode, align);
- break;
- }
-
- case MODE_INT:
- case MODE_PARTIAL_INT:
- assemble_integer (x, GET_MODE_SIZE (mode), align, 1);
- break;
-
- case MODE_VECTOR_FLOAT:
- case MODE_VECTOR_INT:
- {
- int i, units;
- enum machine_mode submode = GET_MODE_INNER (mode);
- unsigned int subalign = MIN (align, GET_MODE_BITSIZE (submode));
-
- gcc_assert (GET_CODE (x) == CONST_VECTOR);
- units = CONST_VECTOR_NUNITS (x);
-
- for (i = 0; i < units; i++)
- {
- rtx elt = CONST_VECTOR_ELT (x, i);
- output_constant_pool_2 (submode, elt, i ? subalign : align);
- }
- }
- break;
-
- default:
- gcc_unreachable ();
- }
-}
-
-/* Worker function for output_constant_pool. Emit constant DESC,
- giving it ALIGN bits of alignment. */
-
-static void
-output_constant_pool_1 (struct constant_descriptor_rtx *desc,
- unsigned int align)
-{
- rtx x, tmp;
-
- x = desc->constant;
-
- /* 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. */
-
- tmp = x;
- switch (GET_CODE (x))
- {
- case CONST:
- if (GET_CODE (XEXP (x, 0)) != PLUS
- || GET_CODE (XEXP (XEXP (x, 0), 0)) != LABEL_REF)
- break;
- tmp = XEXP (XEXP (x, 0), 0);
- /* FALLTHRU */
-
- case LABEL_REF:
- tmp = XEXP (x, 0);
- gcc_assert (!INSN_DELETED_P (tmp));
- gcc_assert (!NOTE_P (tmp)
- || NOTE_LINE_NUMBER (tmp) != NOTE_INSN_DELETED);
- break;
-
- default:
- break;
- }
-
-#ifdef ASM_OUTPUT_SPECIAL_POOL_ENTRY
- ASM_OUTPUT_SPECIAL_POOL_ENTRY (asm_out_file, x, desc->mode,
- align, desc->labelno, done);
-#endif
-
- assemble_align (align);
-
- /* Output the label. */
- targetm.asm_out.internal_label (asm_out_file, "LC", desc->labelno);
-
- /* Output the data. */
- output_constant_pool_2 (desc->mode, x, align);
-
- /* Make sure all constants in SECTION_MERGE and not SECTION_STRINGS
- sections have proper size. */
- if (align > GET_MODE_BITSIZE (desc->mode)
- && in_section
- && (in_section->common.flags & SECTION_MERGE))
- assemble_align (align);
-
-#ifdef ASM_OUTPUT_SPECIAL_POOL_ENTRY
- done:
-#endif
- return;
-}
-
-/* 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 int
-mark_constant (rtx *current_rtx, void *data ATTRIBUTE_UNUSED)
-{
- rtx x = *current_rtx;
-
- if (x == NULL_RTX || GET_CODE (x) != SYMBOL_REF)
- return 0;
-
- if (CONSTANT_POOL_ADDRESS_P (x))
- {
- struct constant_descriptor_rtx *desc = SYMBOL_REF_CONSTANT (x);
- if (desc->mark == 0)
- {
- desc->mark = 1;
- for_each_rtx (&desc->constant, mark_constant, NULL);
- }
- }
- else if (TREE_CONSTANT_POOL_ADDRESS_P (x))
- {
- tree exp = SYMBOL_REF_DECL (x);
- if (!TREE_ASM_WRITTEN (exp))
- {
- n_deferred_constants--;
- output_constant_def_contents (x);
- }
- }
-
- return -1;
-}
-
-/* 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. */
-
-static void
-mark_constants (rtx insn)
-{
- if (!INSN_P (insn))
- return;
-
- /* 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. */
- if (GET_CODE (PATTERN (insn)) == SEQUENCE)
- {
- rtx seq = PATTERN (insn);
- int i, n = XVECLEN (seq, 0);
- for (i = 0; i < n; ++i)
- {
- rtx subinsn = XVECEXP (seq, 0, i);
- if (INSN_P (subinsn))
- for_each_rtx (&PATTERN (subinsn), mark_constant, NULL);
- }
- }
- else
- for_each_rtx (&PATTERN (insn), mark_constant, NULL);
-}
-
-/* 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. */
-
-static void
-mark_constant_pool (void)
-{
- rtx insn, link;
-
- if (!current_function_uses_const_pool && n_deferred_constants == 0)
- return;
-
- for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
- mark_constants (insn);
-
- for (link = current_function_epilogue_delay_list;
- link;
- link = XEXP (link, 1))
- mark_constants (XEXP (link, 0));
-}
-
-/* Write all the constants in POOL. */
-
-static void
-output_constant_pool_contents (struct rtx_constant_pool *pool)
-{
- struct constant_descriptor_rtx *desc;
-
- for (desc = pool->first; desc ; desc = desc->next)
- if (desc->mark)
- {
- /* 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. */
- if (SYMBOL_REF_HAS_BLOCK_INFO_P (desc->sym)
- && SYMBOL_REF_BLOCK (desc->sym))
- place_block_symbol (desc->sym);
- else
- {
- switch_to_section (targetm.asm_out.select_rtx_section
- (desc->mode, desc->constant, desc->align));
- output_constant_pool_1 (desc, desc->align);
- }
- }
-}
-
-/* Mark all constants that are used in the current function, then write
- out the function's private constant pool. */
-
-static void
-output_constant_pool (const char *fnname ATTRIBUTE_UNUSED,
- tree fndecl ATTRIBUTE_UNUSED)
-{
- struct rtx_constant_pool *pool = cfun->varasm->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. */
- mark_constant_pool ();
-
-#ifdef ASM_OUTPUT_POOL_PROLOGUE
- ASM_OUTPUT_POOL_PROLOGUE (asm_out_file, fnname, fndecl, pool->offset);
-#endif
-
- output_constant_pool_contents (pool);
-
-#ifdef ASM_OUTPUT_POOL_EPILOGUE
- ASM_OUTPUT_POOL_EPILOGUE (asm_out_file, fnname, fndecl, pool->offset);
-#endif
-}
-
-/* Write the contents of the shared constant pool. */
-
-void
-output_shared_constant_pool (void)
-{
- output_constant_pool_contents (shared_constant_pool);
-}
-
-/* Determine what kind of relocations EXP may need. */
-
-int
-compute_reloc_for_constant (tree exp)
-{
- int reloc = 0, reloc2;
- tree tem;
-
- /* Give the front-end a chance to convert VALUE to something that
- looks more like a constant to the back-end. */
- exp = lang_hooks.expand_constant (exp);
-
- switch (TREE_CODE (exp))
- {
- case ADDR_EXPR:
- case FDESC_EXPR:
- /* 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. */
- for (tem = TREE_OPERAND (exp, 0); handled_component_p (tem);
- tem = TREE_OPERAND (tem, 0))
- ;
-
- if (TREE_PUBLIC (tem))
- reloc |= 2;
- else
- reloc |= 1;
- break;
-
- case PLUS_EXPR:
- reloc = compute_reloc_for_constant (TREE_OPERAND (exp, 0));
- reloc |= compute_reloc_for_constant (TREE_OPERAND (exp, 1));
- break;
-
- case MINUS_EXPR:
- reloc = compute_reloc_for_constant (TREE_OPERAND (exp, 0));
- reloc2 = compute_reloc_for_constant (TREE_OPERAND (exp, 1));
- /* The difference of two local labels is computable at link time. */
- if (reloc == 1 && reloc2 == 1)
- reloc = 0;
- else
- reloc |= reloc2;
- break;
-
- case NOP_EXPR:
- case CONVERT_EXPR:
- case NON_LVALUE_EXPR:
- case VIEW_CONVERT_EXPR:
- reloc = compute_reloc_for_constant (TREE_OPERAND (exp, 0));
- break;
-
- case CONSTRUCTOR:
- {
- unsigned HOST_WIDE_INT idx;
- FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (exp), idx, tem)
- if (tem != 0)
- reloc |= compute_reloc_for_constant (tem);
- }
- break;
-
- default:
- break;
- }
- return reloc;
-}
-
-/* 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. */
-
-static void
-output_addressed_constants (tree exp)
-{
- tree tem;
-
- /* Give the front-end a chance to convert VALUE to something that
- looks more like a constant to the back-end. */
- exp = lang_hooks.expand_constant (exp);
-
- switch (TREE_CODE (exp))
- {
- case ADDR_EXPR:
- case FDESC_EXPR:
- /* 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. */
- for (tem = TREE_OPERAND (exp, 0); handled_component_p (tem);
- tem = TREE_OPERAND (tem, 0))
- ;
-
- /* If we have an initialized CONST_DECL, retrieve the initializer. */
- if (TREE_CODE (tem) == CONST_DECL && DECL_INITIAL (tem))
- tem = DECL_INITIAL (tem);
-
- if (CONSTANT_CLASS_P (tem) || TREE_CODE (tem) == CONSTRUCTOR)
- output_constant_def (tem, 0);
- break;
-
- case PLUS_EXPR:
- case MINUS_EXPR:
- output_addressed_constants (TREE_OPERAND (exp, 1));
- /* Fall through. */
-
- case NOP_EXPR:
- case CONVERT_EXPR:
- case NON_LVALUE_EXPR:
- case VIEW_CONVERT_EXPR:
- output_addressed_constants (TREE_OPERAND (exp, 0));
- break;
-
- case CONSTRUCTOR:
- {
- unsigned HOST_WIDE_INT idx;
- FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (exp), idx, tem)
- if (tem != 0)
- output_addressed_constants (tem);
- }
- break;
-
- default:
- break;
- }
-}
-
-/* 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. */
-
-bool
-constructor_static_from_elts_p (tree ctor)
-{
- return (TREE_CONSTANT (ctor)
- && (TREE_CODE (TREE_TYPE (ctor)) == UNION_TYPE
- /* APPLE LOCAL AltiVec */
- || TREE_CODE (TREE_TYPE (ctor)) == VECTOR_TYPE
- || TREE_CODE (TREE_TYPE (ctor)) == RECORD_TYPE)
- && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (ctor)));
-}
-
-/* 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. */
-
-tree
-initializer_constant_valid_p (tree value, tree endtype)
-{
- /* Give the front-end a chance to convert VALUE to something that
- looks more like a constant to the back-end. */
- value = lang_hooks.expand_constant (value);
-
- switch (TREE_CODE (value))
- {
- case CONSTRUCTOR:
- if (constructor_static_from_elts_p (value))
- {
- unsigned HOST_WIDE_INT idx;
- tree elt;
- bool absolute = true;
-
- FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (value), idx, elt)
- {
- tree reloc;
- reloc = initializer_constant_valid_p (elt, TREE_TYPE (elt));
- if (!reloc)
- return NULL_TREE;
- if (reloc != null_pointer_node)
- absolute = false;
- }
- /* For a non-absolute relocation, there is no single
- variable that can be "the variable that determines the
- relocation." */
- return absolute ? null_pointer_node : error_mark_node;
- }
-
- return TREE_STATIC (value) ? null_pointer_node : NULL_TREE;
-
- case INTEGER_CST:
- case VECTOR_CST:
- case REAL_CST:
- case STRING_CST:
- case COMPLEX_CST:
- return null_pointer_node;
-
- case ADDR_EXPR:
- case FDESC_EXPR:
- value = staticp (TREE_OPERAND (value, 0));
- if (value)
- {
- /* "&(*a).f" is like unto pointer arithmetic. If "a" turns out to
- be a constant, this is old-skool offsetof-like nonsense. */
- if (TREE_CODE (value) == INDIRECT_REF
- && TREE_CONSTANT (TREE_OPERAND (value, 0)))
- return null_pointer_node;
- /* Taking the address of a nested function involves a trampoline. */
- if (TREE_CODE (value) == FUNCTION_DECL
- && ((decl_function_context (value)
- && !DECL_NO_STATIC_CHAIN (value))
- || DECL_DLLIMPORT_P (value)))
- return NULL_TREE;
- /* "&{...}" requires a temporary to hold the constructed
- object. */
- if (TREE_CODE (value) == CONSTRUCTOR)
- return NULL_TREE;
- }
- return value;
-
- case VIEW_CONVERT_EXPR:
- case NON_LVALUE_EXPR:
- return initializer_constant_valid_p (TREE_OPERAND (value, 0), endtype);
-
- case CONVERT_EXPR:
- case NOP_EXPR:
- {
- tree src;
- tree src_type;
- tree dest_type;
-
- src = TREE_OPERAND (value, 0);
- src_type = TREE_TYPE (src);
- dest_type = TREE_TYPE (value);
-
- /* Allow conversions between pointer types, floating-point
- types, and offset types. */
- if ((POINTER_TYPE_P (dest_type) && POINTER_TYPE_P (src_type))
- || (FLOAT_TYPE_P (dest_type) && FLOAT_TYPE_P (src_type))
- || (TREE_CODE (dest_type) == OFFSET_TYPE
- && TREE_CODE (src_type) == OFFSET_TYPE))
- return initializer_constant_valid_p (src, endtype);
-
- /* Allow length-preserving conversions between integer types. */
- if (INTEGRAL_TYPE_P (dest_type) && INTEGRAL_TYPE_P (src_type)
- && (TYPE_PRECISION (dest_type) == TYPE_PRECISION (src_type)))
- return initializer_constant_valid_p (src, endtype);
-
- /* Allow conversions between other integer types only if
- explicit value. */
- if (INTEGRAL_TYPE_P (dest_type) && INTEGRAL_TYPE_P (src_type))
- {
- tree inner = initializer_constant_valid_p (src, endtype);
- if (inner == null_pointer_node)
- return null_pointer_node;
- break;
- }
-
- /* Allow (int) &foo provided int is as wide as a pointer. */
- if (INTEGRAL_TYPE_P (dest_type) && POINTER_TYPE_P (src_type)
- && (TYPE_PRECISION (dest_type) >= TYPE_PRECISION (src_type)))
- return initializer_constant_valid_p (src, endtype);
-
- /* Likewise conversions from int to pointers, but also allow
- conversions from 0. */
- if ((POINTER_TYPE_P (dest_type)
- || TREE_CODE (dest_type) == OFFSET_TYPE)
- && INTEGRAL_TYPE_P (src_type))
- {
- if (TREE_CODE (src) == INTEGER_CST
- && TYPE_PRECISION (dest_type) >= TYPE_PRECISION (src_type))
- return null_pointer_node;
- if (integer_zerop (src))
- return null_pointer_node;
- else if (TYPE_PRECISION (dest_type) <= TYPE_PRECISION (src_type))
- return initializer_constant_valid_p (src, endtype);
- }
-
- /* Allow conversions to struct or union types if the value
- inside is okay. */
- if (TREE_CODE (dest_type) == RECORD_TYPE
- || TREE_CODE (dest_type) == UNION_TYPE)
- return initializer_constant_valid_p (src, endtype);
- }
- break;
-
- case PLUS_EXPR:
- if (! INTEGRAL_TYPE_P (endtype)
- || TYPE_PRECISION (endtype) >= POINTER_SIZE)
- {
- tree valid0 = initializer_constant_valid_p (TREE_OPERAND (value, 0),
- endtype);
- tree valid1 = initializer_constant_valid_p (TREE_OPERAND (value, 1),
- endtype);
- /* If either term is absolute, use the other terms relocation. */
- if (valid0 == null_pointer_node)
- return valid1;
- if (valid1 == null_pointer_node)
- return valid0;
- }
- break;
-
- case MINUS_EXPR:
- if (! INTEGRAL_TYPE_P (endtype)
- || TYPE_PRECISION (endtype) >= POINTER_SIZE)
- {
- tree valid0 = initializer_constant_valid_p (TREE_OPERAND (value, 0),
- endtype);
- tree valid1 = initializer_constant_valid_p (TREE_OPERAND (value, 1),
- endtype);
- /* Win if second argument is absolute. */
- if (valid1 == null_pointer_node)
- return valid0;
- /* Win if both arguments have the same relocation.
- Then the value is absolute. */
- if (valid0 == valid1 && valid0 != 0)
- return null_pointer_node;
-
- /* Since GCC guarantees that string constants are unique in the
- generated code, a subtraction between two copies of the same
- constant string is absolute. */
- if (valid0 && TREE_CODE (valid0) == STRING_CST
- && valid1 && TREE_CODE (valid1) == STRING_CST
- && operand_equal_p (valid0, valid1, 1))
- return null_pointer_node;
- }
-
- /* Support narrowing differences. */
- if (INTEGRAL_TYPE_P (endtype))
- {
- tree op0, op1;
-
- op0 = TREE_OPERAND (value, 0);
- op1 = TREE_OPERAND (value, 1);
-
- /* 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. */
-
- while (TREE_CODE (op0) == NOP_EXPR
- || TREE_CODE (op0) == CONVERT_EXPR
- || TREE_CODE (op0) == NON_LVALUE_EXPR)
- {
- tree inner = TREE_OPERAND (op0, 0);
- if (inner == error_mark_node
- || ! INTEGRAL_MODE_P (TYPE_MODE (TREE_TYPE (inner)))
- || (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (op0)))
- > GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (inner)))))
- break;
- op0 = inner;
- }
-
- while (TREE_CODE (op1) == NOP_EXPR
- || TREE_CODE (op1) == CONVERT_EXPR
- || TREE_CODE (op1) == NON_LVALUE_EXPR)
- {
- tree inner = TREE_OPERAND (op1, 0);
- if (inner == error_mark_node
- || ! INTEGRAL_MODE_P (TYPE_MODE (TREE_TYPE (inner)))
- || (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (op1)))
- > GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (inner)))))
- break;
- op1 = inner;
- }
-
- op0 = initializer_constant_valid_p (op0, endtype);
- op1 = initializer_constant_valid_p (op1, endtype);
-
- /* Both initializers must be known. */
- if (op0 && op1)
- {
- if (op0 == op1)
- return null_pointer_node;
-
- /* Support differences between labels. */
- if (TREE_CODE (op0) == LABEL_DECL
- && TREE_CODE (op1) == LABEL_DECL)
- return null_pointer_node;
-
- if (TREE_CODE (op0) == STRING_CST
- && TREE_CODE (op1) == STRING_CST
- && operand_equal_p (op0, op1, 1))
- return null_pointer_node;
- }
- }
- break;
-
- default:
- break;
- }
-
- return 0;
-}
-
-/* Output assembler code for constant EXP to FILE, with no label.
- This includes the pseudo-op such as ".int" or ".byte", and a newline.
- Assumes output_addressed_constants has been done on EXP already.
-
- Generate exactly SIZE bytes of assembler data, padding at the end
- with zeros if necessary. SIZE must always be specified.
-
- 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. */
-
-void
-output_constant (tree exp, unsigned HOST_WIDE_INT size, unsigned int align)
-{
- enum tree_code code;
- unsigned HOST_WIDE_INT thissize;
-
- /* Some front-ends use constants other than the standard language-independent
- varieties, but which may still be output directly. Give the front-end a
- chance to convert EXP to a language-independent representation. */
- exp = lang_hooks.expand_constant (exp);
-
- if (size == 0 || flag_syntax_only)
- return;
-
- /* 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. */
- if (TREE_CODE (exp) == NOP_EXPR
- && POINTER_TYPE_P (TREE_TYPE (exp))
- && targetm.valid_pointer_mode (TYPE_MODE (TREE_TYPE (exp))))
- {
- tree saved_type = TREE_TYPE (exp);
-
- /* Peel off any intermediate conversions-to-pointer for valid
- pointer modes. */
- while (TREE_CODE (exp) == NOP_EXPR
- && POINTER_TYPE_P (TREE_TYPE (exp))
- && targetm.valid_pointer_mode (TYPE_MODE (TREE_TYPE (exp))))
- exp = TREE_OPERAND (exp, 0);
-
- /* If what we're left with is the address of something, we can
- convert the address to the final type and output it that
- way. */
- if (TREE_CODE (exp) == ADDR_EXPR)
- exp = build1 (ADDR_EXPR, saved_type, TREE_OPERAND (exp, 0));
- /* Likewise for constant ints. */
- else if (TREE_CODE (exp) == INTEGER_CST)
- exp = build_int_cst_wide (saved_type, TREE_INT_CST_LOW (exp),
- TREE_INT_CST_HIGH (exp));
-
- }
-
- /* Eliminate any conversions since we'll be outputting the underlying
- constant. */
- while (TREE_CODE (exp) == NOP_EXPR || TREE_CODE (exp) == CONVERT_EXPR
- || TREE_CODE (exp) == NON_LVALUE_EXPR
- || TREE_CODE (exp) == VIEW_CONVERT_EXPR)
- {
- HOST_WIDE_INT type_size = int_size_in_bytes (TREE_TYPE (exp));
- HOST_WIDE_INT op_size = int_size_in_bytes (TREE_TYPE (TREE_OPERAND (exp, 0)));
-
- /* 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. */
- if (type_size > op_size
- && TREE_CODE (exp) != VIEW_CONVERT_EXPR
- && TREE_CODE (TREE_TYPE (exp)) != UNION_TYPE)
- /* Keep the conversion. */
- break;
- else
- exp = TREE_OPERAND (exp, 0);
- }
-
- code = TREE_CODE (TREE_TYPE (exp));
- thissize = int_size_in_bytes (TREE_TYPE (exp));
-
- /* Give the front end another chance to expand constants. */
- exp = lang_hooks.expand_constant (exp);
-
- /* Allow a constructor with no elements for any data type.
- This means to fill the space with zeros. */
- if (TREE_CODE (exp) == CONSTRUCTOR
- && VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (exp)))
- {
- assemble_zeros (size);
- return;
- }
-
- if (TREE_CODE (exp) == FDESC_EXPR)
- {
-#ifdef ASM_OUTPUT_FDESC
- HOST_WIDE_INT part = tree_low_cst (TREE_OPERAND (exp, 1), 0);
- tree decl = TREE_OPERAND (exp, 0);
- ASM_OUTPUT_FDESC (asm_out_file, decl, part);
-#else
- gcc_unreachable ();
-#endif
- return;
- }
-
- /* Now output the underlying data. If we've handling the padding, return.
- Otherwise, break and ensure SIZE is the size written. */
- switch (code)
- {
- case BOOLEAN_TYPE:
- case INTEGER_TYPE:
- case ENUMERAL_TYPE:
- case POINTER_TYPE:
- case REFERENCE_TYPE:
- /* APPLE LOCAL radar 5822844 */
- case BLOCK_POINTER_TYPE:
- case OFFSET_TYPE:
- if (! assemble_integer (expand_expr (exp, NULL_RTX, VOIDmode,
- EXPAND_INITIALIZER),
- MIN (size, thissize), align, 0))
- error ("initializer for integer value is too complicated");
- break;
-
- case REAL_TYPE:
- if (TREE_CODE (exp) != REAL_CST)
- error ("initializer for floating value is not a floating constant");
-
- assemble_real (TREE_REAL_CST (exp), TYPE_MODE (TREE_TYPE (exp)), align);
- break;
-
- case COMPLEX_TYPE:
- output_constant (TREE_REALPART (exp), thissize / 2, align);
- output_constant (TREE_IMAGPART (exp), thissize / 2,
- min_align (align, BITS_PER_UNIT * (thissize / 2)));
- break;
-
- case ARRAY_TYPE:
- case VECTOR_TYPE:
- switch (TREE_CODE (exp))
- {
- case CONSTRUCTOR:
- output_constructor (exp, size, align);
- return;
- case STRING_CST:
- thissize = MIN ((unsigned HOST_WIDE_INT)TREE_STRING_LENGTH (exp),
- size);
- assemble_string (TREE_STRING_POINTER (exp), thissize);
- break;
-
- case VECTOR_CST:
- {
- int elt_size;
- tree link;
- unsigned int nalign;
- enum machine_mode inner;
-
- inner = TYPE_MODE (TREE_TYPE (TREE_TYPE (exp)));
- nalign = MIN (align, GET_MODE_ALIGNMENT (inner));
-
- elt_size = GET_MODE_SIZE (inner);
-
- link = TREE_VECTOR_CST_ELTS (exp);
- output_constant (TREE_VALUE (link), elt_size, align);
- thissize = elt_size;
- while ((link = TREE_CHAIN (link)) != NULL)
- {
- output_constant (TREE_VALUE (link), elt_size, nalign);
- thissize += elt_size;
- }
- break;
- }
- default:
- gcc_unreachable ();
- }
- break;
-
- case RECORD_TYPE:
- case UNION_TYPE:
- gcc_assert (TREE_CODE (exp) == CONSTRUCTOR);
- output_constructor (exp, size, align);
- return;
-
- case ERROR_MARK:
- return;
-
- default:
- gcc_unreachable ();
- }
-
- if (size > thissize)
- assemble_zeros (size - thissize);
-}
-
-
-/* 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. */
-
-static unsigned HOST_WIDE_INT
-array_size_for_constructor (tree val)
-{
- tree max_index, i;
- unsigned HOST_WIDE_INT cnt;
- tree index, value, tmp;
-
- /* 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. */
- if (TREE_CODE (val) == STRING_CST)
- return TREE_STRING_LENGTH (val);
-
- max_index = NULL_TREE;
- FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (val), cnt, index, value)
- {
- if (TREE_CODE (index) == RANGE_EXPR)
- index = TREE_OPERAND (index, 1);
- if (max_index == NULL_TREE || tree_int_cst_lt (max_index, index))
- max_index = index;
- }
-
- if (max_index == NULL_TREE)
- return 0;
-
- /* Compute the total number of array elements. */
- tmp = TYPE_MIN_VALUE (TYPE_DOMAIN (TREE_TYPE (val)));
- i = size_binop (MINUS_EXPR, fold_convert (sizetype, max_index),
- fold_convert (sizetype, tmp));
- i = size_binop (PLUS_EXPR, i, build_int_cst (sizetype, 1));
-
- /* Multiply by the array element unit size to find number of bytes. */
- i = size_binop (MULT_EXPR, i, TYPE_SIZE_UNIT (TREE_TYPE (TREE_TYPE (val))));
-
- return tree_low_cst (i, 1);
-}
-
-/* Subroutine of output_constant, used for CONSTRUCTORs (aggregate constants).
- Generate at least SIZE bytes, padding if necessary. */
-
-static void
-output_constructor (tree exp, unsigned HOST_WIDE_INT size,
- unsigned int align)
-{
- tree type = TREE_TYPE (exp);
- tree field = 0;
- tree min_index = 0;
- /* Number of bytes output or skipped so far.
- In other words, current position within the constructor. */
- HOST_WIDE_INT total_bytes = 0;
- /* Nonzero means BYTE contains part of a byte, to be output. */
- int byte_buffer_in_use = 0;
- int byte = 0;
- unsigned HOST_WIDE_INT cnt;
- constructor_elt *ce;
-
- gcc_assert (HOST_BITS_PER_WIDE_INT >= BITS_PER_UNIT);
-
- /* APPLE LOCAL begin bitfield reversal 4228294 4387676 4388773 */
- if (TREE_CODE (type) == RECORD_TYPE && TYPE_FIELDS (type))
- {
- /* If bitfields were reversed they will not be in ascending
- address order here, which confuses the code below. Sort
- the constructor. Note that the type retains the old
- ordering, for debug info purposes. (The comment below that
- says FIELD goes through the structure fields is misleading;
- FIELD is set from the constructor, not the type, so uses
- the constructor list's ordering.) */
- unsigned head = 0, last;
- VEC(constructor_elt, gc) *elts = CONSTRUCTOR_ELTS (exp);
- unsigned elt_count = VEC_length (constructor_elt, elts);
- while (head < elt_count)
- {
- constructor_elt *head_elt;
- head_elt = VEC_index (constructor_elt, elts, head);
- if (head_elt->index)
- {
- HOST_WIDE_INT pos = int_bit_position (head_elt->index);
- /* Find next field that is after "head" in memory. */
- unsigned afterlast;
- for (afterlast = head + 1;
- afterlast < elt_count;
- afterlast++)
- {
- tree field_decl = VEC_index (constructor_elt,
- elts, afterlast)->index;
- if (field_decl
- && int_bit_position (field_decl) >= pos)
- break;
- }
- last = afterlast - 1;
-
- /* Reverse fields head..last inclusive. */
- while (head < last)
- {
- VEC_swap (constructor_elt, elts, head, last);
- head++;
- last--;
- }
- head = afterlast;
- }
- else
- head++;
- }
- field = TYPE_FIELDS (type);
- }
- /* APPLE LOCAL end bitfield reversal 4228294 4387676 4388773 */
-
- if (TREE_CODE (type) == ARRAY_TYPE
- && TYPE_DOMAIN (type) != 0)
- min_index = TYPE_MIN_VALUE (TYPE_DOMAIN (type));
-
- /* As LINK 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, then 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). */
- for (cnt = 0;
- VEC_iterate (constructor_elt, CONSTRUCTOR_ELTS (exp), cnt, ce);
- cnt++, field = field ? TREE_CHAIN (field) : 0)
- {
- tree val = ce->value;
- tree index = 0;
-
- /* The element in a union constructor specifies the proper field
- or index. */
- if ((TREE_CODE (type) == RECORD_TYPE || TREE_CODE (type) == UNION_TYPE
- || TREE_CODE (type) == QUAL_UNION_TYPE)
- && ce->index != 0)
- field = ce->index;
-
- else if (TREE_CODE (type) == ARRAY_TYPE)
- index = ce->index;
-
-#ifdef ASM_COMMENT_START
- if (field && flag_verbose_asm)
- fprintf (asm_out_file, "%s %s:\n",
- ASM_COMMENT_START,
- DECL_NAME (field)
- ? IDENTIFIER_POINTER (DECL_NAME (field))
- : "<anonymous>");
-#endif
-
- /* Eliminate the marker that makes a cast not be an lvalue. */
- if (val != 0)
- STRIP_NOPS (val);
-
- if (index && TREE_CODE (index) == RANGE_EXPR)
- {
- unsigned HOST_WIDE_INT fieldsize
- = int_size_in_bytes (TREE_TYPE (type));
- HOST_WIDE_INT lo_index = tree_low_cst (TREE_OPERAND (index, 0), 0);
- HOST_WIDE_INT hi_index = tree_low_cst (TREE_OPERAND (index, 1), 0);
- HOST_WIDE_INT index;
- unsigned int align2 = min_align (align, fieldsize * BITS_PER_UNIT);
-
- for (index = lo_index; index <= hi_index; index++)
- {
- /* Output the element's initial value. */
- if (val == 0)
- assemble_zeros (fieldsize);
- else
- output_constant (val, fieldsize, align2);
-
- /* Count its size. */
- total_bytes += fieldsize;
- }
- }
- else if (field == 0 || !DECL_BIT_FIELD (field))
- {
- /* An element that is not a bit-field. */
-
- unsigned HOST_WIDE_INT fieldsize;
- /* Since this structure is static,
- we know the positions are constant. */
- HOST_WIDE_INT pos = field ? int_byte_position (field) : 0;
- unsigned int align2;
-
- if (index != 0)
- pos = (tree_low_cst (TYPE_SIZE_UNIT (TREE_TYPE (val)), 1)
- * (tree_low_cst (index, 0) - tree_low_cst (min_index, 0)));
-
- /* Output any buffered-up bit-fields preceding this element. */
- if (byte_buffer_in_use)
- {
- assemble_integer (GEN_INT (byte), 1, BITS_PER_UNIT, 1);
- total_bytes++;
- byte_buffer_in_use = 0;
- }
-
- /* Advance to offset of this element.
- Note no alignment needed in an array, since that is guaranteed
- if each element has the proper size. */
- if ((field != 0 || index != 0) && pos != total_bytes)
- {
- gcc_assert (pos >= total_bytes);
- assemble_zeros (pos - total_bytes);
- total_bytes = pos;
- }
-
- /* Find the alignment of this element. */
- align2 = min_align (align, BITS_PER_UNIT * pos);
-
- /* Determine size this element should occupy. */
- if (field)
- {
- fieldsize = 0;
-
- /* 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. */
- if (TREE_CODE (TREE_TYPE (field)) == ARRAY_TYPE
- && TYPE_DOMAIN (TREE_TYPE (field))
- && ! TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (field))))
- {
- fieldsize = array_size_for_constructor (val);
- /* Given a non-empty initialization, this field had
- better be last. */
- gcc_assert (!fieldsize || !TREE_CHAIN (field));
- }
- else if (DECL_SIZE_UNIT (field))
- {
- /* ??? This can't be right. If the decl size overflows
- a host integer we will silently emit no data. */
- if (host_integerp (DECL_SIZE_UNIT (field), 1))
- fieldsize = tree_low_cst (DECL_SIZE_UNIT (field), 1);
- }
- }
- else
- fieldsize = int_size_in_bytes (TREE_TYPE (type));
-
- /* Output the element's initial value. */
- if (val == 0)
- assemble_zeros (fieldsize);
- else
- output_constant (val, fieldsize, align2);
-
- /* Count its size. */
- total_bytes += fieldsize;
- }
- else if (val != 0 && TREE_CODE (val) != INTEGER_CST)
- error ("invalid initial value for member %qs",
- IDENTIFIER_POINTER (DECL_NAME (field)));
- else
- {
- /* Element that is a bit-field. */
-
- HOST_WIDE_INT next_offset = int_bit_position (field);
- HOST_WIDE_INT end_offset
- = (next_offset + tree_low_cst (DECL_SIZE (field), 1));
-
- if (val == 0)
- val = integer_zero_node;
-
- /* If this field does not start in this (or, next) byte,
- skip some bytes. */
- if (next_offset / BITS_PER_UNIT != total_bytes)
- {
- /* Output remnant of any bit field in previous bytes. */
- if (byte_buffer_in_use)
- {
- assemble_integer (GEN_INT (byte), 1, BITS_PER_UNIT, 1);
- total_bytes++;
- byte_buffer_in_use = 0;
- }
-
- /* If still not at proper byte, advance to there. */
- if (next_offset / BITS_PER_UNIT != total_bytes)
- {
- gcc_assert (next_offset / BITS_PER_UNIT >= total_bytes);
- assemble_zeros (next_offset / BITS_PER_UNIT - total_bytes);
- total_bytes = next_offset / BITS_PER_UNIT;
- }
- }
-
- if (! byte_buffer_in_use)
- byte = 0;
-
- /* We must split the element into pieces that fall within
- separate bytes, and combine each byte with previous or
- following bit-fields. */
-
- /* next_offset is the offset n fbits from the beginning of
- the structure to the next bit of this element to be processed.
- end_offset is the offset of the first bit past the end of
- this element. */
- while (next_offset < end_offset)
- {
- int this_time;
- int shift;
- HOST_WIDE_INT value;
- HOST_WIDE_INT next_byte = next_offset / BITS_PER_UNIT;
- HOST_WIDE_INT next_bit = next_offset % BITS_PER_UNIT;
-
- /* Advance from byte to byte
- within this element when necessary. */
- while (next_byte != total_bytes)
- {
- assemble_integer (GEN_INT (byte), 1, BITS_PER_UNIT, 1);
- total_bytes++;
- byte = 0;
- }
-
- /* Number of bits we can process at once
- (all part of the same byte). */
- this_time = MIN (end_offset - next_offset,
- BITS_PER_UNIT - next_bit);
- if (BYTES_BIG_ENDIAN)
- {
- /* 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. */
- shift = end_offset - next_offset - this_time;
-
- /* 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. */
- if (shift < HOST_BITS_PER_WIDE_INT
- && shift + this_time > HOST_BITS_PER_WIDE_INT)
- {
- this_time = shift + this_time - HOST_BITS_PER_WIDE_INT;
- shift = HOST_BITS_PER_WIDE_INT;
- }
-
- /* Now get the bits from the appropriate constant word. */
- if (shift < HOST_BITS_PER_WIDE_INT)
- value = TREE_INT_CST_LOW (val);
- else
- {
- gcc_assert (shift < 2 * HOST_BITS_PER_WIDE_INT);
- value = TREE_INT_CST_HIGH (val);
- shift -= HOST_BITS_PER_WIDE_INT;
- }
-
- /* Get the result. This works only when:
- 1 <= this_time <= HOST_BITS_PER_WIDE_INT. */
- byte |= (((value >> shift)
- & (((HOST_WIDE_INT) 2 << (this_time - 1)) - 1))
- << (BITS_PER_UNIT - this_time - next_bit));
- }
- else
- {
- /* 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. */
- shift = next_offset - int_bit_position (field);
-
- /* 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. */
- if (shift < HOST_BITS_PER_WIDE_INT
- && shift + this_time > HOST_BITS_PER_WIDE_INT)
- this_time = (HOST_BITS_PER_WIDE_INT - shift);
-
- /* Now get the bits from the appropriate constant word. */
- if (shift < HOST_BITS_PER_WIDE_INT)
- value = TREE_INT_CST_LOW (val);
- else
- {
- gcc_assert (shift < 2 * HOST_BITS_PER_WIDE_INT);
- value = TREE_INT_CST_HIGH (val);
- shift -= HOST_BITS_PER_WIDE_INT;
- }
-
- /* Get the result. This works only when:
- 1 <= this_time <= HOST_BITS_PER_WIDE_INT. */
- byte |= (((value >> shift)
- & (((HOST_WIDE_INT) 2 << (this_time - 1)) - 1))
- << next_bit);
- }
-
- next_offset += this_time;
- byte_buffer_in_use = 1;
- }
- }
- }
-
- if (byte_buffer_in_use)
- {
- assemble_integer (GEN_INT (byte), 1, BITS_PER_UNIT, 1);
- total_bytes++;
- }
-
- if ((unsigned HOST_WIDE_INT)total_bytes < size)
- assemble_zeros (size - total_bytes);
-}
-
-/* This TREE_LIST contains any weak symbol declarations waiting
- to be emitted. */
-static GTY(()) tree weak_decls;
-
-/* Mark DECL as weak. */
-
-static void
-mark_weak (tree decl)
-{
- DECL_WEAK (decl) = 1;
-
- if (DECL_RTL_SET_P (decl)
- && MEM_P (DECL_RTL (decl))
- && XEXP (DECL_RTL (decl), 0)
- && GET_CODE (XEXP (DECL_RTL (decl), 0)) == SYMBOL_REF)
- SYMBOL_REF_WEAK (XEXP (DECL_RTL (decl), 0)) = 1;
-}
-
-/* Merge weak status between NEWDECL and OLDDECL. */
-
-void
-merge_weak (tree newdecl, tree olddecl)
-{
- if (DECL_WEAK (newdecl) == DECL_WEAK (olddecl))
- {
- if (DECL_WEAK (newdecl) && SUPPORTS_WEAK)
- {
- tree *pwd;
- /* We put the NEWDECL on the weak_decls list at some point
- and OLDDECL as well. Keep just OLDDECL on the list. */
- for (pwd = &weak_decls; *pwd; pwd = &TREE_CHAIN (*pwd))
- if (TREE_VALUE (*pwd) == newdecl)
- {
- *pwd = TREE_CHAIN (*pwd);
- break;
- }
- }
- return;
- }
-
- if (DECL_WEAK (newdecl))
- {
- tree wd;
-
- /* 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 error cannot caught in
- declare_weak because the NEWDECL and OLDDECL was not yet
- been merged; therefore, TREE_ASM_WRITTEN was not set. */
- if (TREE_ASM_WRITTEN (olddecl))
- error ("weak declaration of %q+D must precede definition",
- newdecl);
-
- /* 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. */
- else if (TREE_USED (olddecl)
- && TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (olddecl)))
- warning (0, "weak declaration of %q+D after first use results "
- "in unspecified behavior", newdecl);
-
- if (SUPPORTS_WEAK)
- {
- /* We put the NEWDECL on the weak_decls list at some point.
- Replace it with the OLDDECL. */
- for (wd = weak_decls; wd; wd = TREE_CHAIN (wd))
- if (TREE_VALUE (wd) == newdecl)
- {
- TREE_VALUE (wd) = olddecl;
- break;
- }
- /* 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. */
- mark_weak (olddecl);
- }
- else
- /* OLDDECL was weak, but NEWDECL was not explicitly marked as
- weak. Just update NEWDECL to indicate that it's weak too. */
- mark_weak (newdecl);
-}
-
-/* Declare DECL to be a weak symbol. */
-
-void
-declare_weak (tree decl)
-{
- if (! TREE_PUBLIC (decl))
- error ("weak declaration of %q+D must be public", decl);
- else if (TREE_CODE (decl) == FUNCTION_DECL && TREE_ASM_WRITTEN (decl))
- error ("weak declaration of %q+D must precede definition", decl);
- else if (SUPPORTS_WEAK)
- {
- if (! DECL_WEAK (decl))
- weak_decls = tree_cons (NULL, decl, weak_decls);
- }
- else
- warning (0, "weak declaration of %q+D not supported", decl);
-
- mark_weak (decl);
-}
-
-static void
-weak_finish_1 (tree decl)
-{
-#if defined (ASM_WEAKEN_DECL) || defined (ASM_WEAKEN_LABEL)
- const char *const name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
-#endif
-
- if (! TREE_USED (decl))
- return;
-
-#ifdef ASM_WEAKEN_DECL
- ASM_WEAKEN_DECL (asm_out_file, decl, name, NULL);
-#else
-#ifdef ASM_WEAKEN_LABEL
- ASM_WEAKEN_LABEL (asm_out_file, name);
-#else
-#ifdef ASM_OUTPUT_WEAK_ALIAS
- {
- static bool warn_once = 0;
- if (! warn_once)
- {
- warning (0, "only weak aliases are supported in this configuration");
- warn_once = 1;
- }
- return;
- }
-#endif
-#endif
-#endif
-}
-
-/* This TREE_LIST contains weakref targets. */
-
-static GTY(()) tree weakref_targets;
-
-/* Forward declaration. */
-static tree find_decl_and_mark_needed (tree decl, tree target);
-
-/* Emit any pending weak declarations. */
-
-void
-weak_finish (void)
-{
- tree t;
-
- for (t = weakref_targets; t; t = TREE_CHAIN (t))
- {
- tree alias_decl = TREE_PURPOSE (t);
- tree target = ultimate_transparent_alias_target (&TREE_VALUE (t));
-
- if (! TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (alias_decl)))
- /* Remove alias_decl from the weak list, but leave entries for
- the target alone. */
- target = NULL_TREE;
-#ifndef ASM_OUTPUT_WEAKREF
- else if (! TREE_SYMBOL_REFERENCED (target))
- {
- /* Use ASM_WEAKEN_LABEL only if ASM_WEAKEN_DECL is not
- defined, otherwise we and weak_finish_1 would use a
- different macros. */
-# if defined ASM_WEAKEN_LABEL && ! defined ASM_WEAKEN_DECL
- ASM_WEAKEN_LABEL (asm_out_file, IDENTIFIER_POINTER (target));
-# else
- tree decl = find_decl_and_mark_needed (alias_decl, target);
-
- if (! decl)
- {
- decl = build_decl (TREE_CODE (alias_decl), target,
- TREE_TYPE (alias_decl));
-
- DECL_EXTERNAL (decl) = 1;
- TREE_PUBLIC (decl) = 1;
- DECL_ARTIFICIAL (decl) = 1;
- TREE_NOTHROW (decl) = TREE_NOTHROW (alias_decl);
- TREE_USED (decl) = 1;
- }
-
- weak_finish_1 (decl);
-# endif
- }
-#endif
-
- {
- tree *p;
- tree t2;
-
- /* 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. */
- for (p = &weak_decls; (t2 = *p) ; )
- {
- if (TREE_VALUE (t2) == alias_decl
- || target == DECL_ASSEMBLER_NAME (TREE_VALUE (t2)))
- *p = TREE_CHAIN (t2);
- else
- p = &TREE_CHAIN (t2);
- }
-
- /* Remove other weakrefs to the same target, to speed things up. */
- for (p = &TREE_CHAIN (t); (t2 = *p) ; )
- {
- if (target == ultimate_transparent_alias_target (&TREE_VALUE (t2)))
- *p = TREE_CHAIN (t2);
- else
- p = &TREE_CHAIN (t2);
- }
- }
- }
-
- for (t = weak_decls; t; t = TREE_CHAIN (t))
- {
- tree decl = TREE_VALUE (t);
-
- weak_finish_1 (decl);
- }
-}
-
-/* Emit the assembly bits to indicate that DECL is globally visible. */
-
-static void
-globalize_decl (tree decl)
-{
- const char *name = XSTR (XEXP (DECL_RTL (decl), 0), 0);
-
-#if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
- if (DECL_WEAK (decl))
- {
- tree *p, t;
-
-#ifdef ASM_WEAKEN_DECL
- ASM_WEAKEN_DECL (asm_out_file, decl, name, 0);
-#else
- ASM_WEAKEN_LABEL (asm_out_file, name);
-#endif
-
- /* Remove this function from the pending weak list so that
- we do not emit multiple .weak directives for it. */
- for (p = &weak_decls; (t = *p) ; )
- {
- if (DECL_ASSEMBLER_NAME (decl) == DECL_ASSEMBLER_NAME (TREE_VALUE (t)))
- *p = TREE_CHAIN (t);
- else
- p = &TREE_CHAIN (t);
- }
-
- /* Remove weakrefs to the same target from the pending weakref
- list, for the same reason. */
- for (p = &weakref_targets; (t = *p) ; )
- {
- if (DECL_ASSEMBLER_NAME (decl)
- == ultimate_transparent_alias_target (&TREE_VALUE (t)))
- *p = TREE_CHAIN (t);
- else
- p = &TREE_CHAIN (t);
- }
-
- return;
- }
-#elif defined(ASM_MAKE_LABEL_LINKONCE)
- if (DECL_ONE_ONLY (decl))
- ASM_MAKE_LABEL_LINKONCE (asm_out_file, name);
-#endif
-
- targetm.asm_out.globalize_label (asm_out_file, name);
-}
-
-/* We have to be able to tell cgraph about the needed-ness of the target
- of an alias. This requires that the decl have been defined. Aliases
- that precede their definition have to be queued for later processing. */
-
-typedef struct alias_pair GTY(())
-{
- tree decl;
- tree target;
-} alias_pair;
-
-/* Define gc'd vector type. */
-DEF_VEC_O(alias_pair);
-DEF_VEC_ALLOC_O(alias_pair,gc);
-
-static GTY(()) VEC(alias_pair,gc) *alias_pairs;
-
-/* Given an assembly name, find the decl it is associated with. At the
- same time, mark it needed for cgraph. */
-
-static tree
-find_decl_and_mark_needed (tree decl, tree target)
-{
- struct cgraph_node *fnode = NULL;
- struct cgraph_varpool_node *vnode = NULL;
-
- if (TREE_CODE (decl) == FUNCTION_DECL)
- {
- fnode = cgraph_node_for_asm (target);
- if (fnode == NULL)
- vnode = cgraph_varpool_node_for_asm (target);
- }
- else
- {
- vnode = cgraph_varpool_node_for_asm (target);
- if (vnode == NULL)
- fnode = cgraph_node_for_asm (target);
- }
-
- if (fnode)
- {
- /* We can't mark function nodes as used after cgraph global info
- is finished. This wouldn't generally be necessary, but C++
- virtual table thunks are introduced late in the game and
- might seem like they need marking, although in fact they
- don't. */
- if (! cgraph_global_info_ready)
- cgraph_mark_needed_node (fnode);
- return fnode->decl;
- }
- else if (vnode)
- {
- cgraph_varpool_mark_needed_node (vnode);
- return vnode->decl;
- }
- else
- return NULL_TREE;
-}
-
-/* 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. */
-
-static void
-do_assemble_alias (tree decl, tree target)
-{
- if (TREE_ASM_WRITTEN (decl))
- return;
-
- TREE_ASM_WRITTEN (decl) = 1;
- TREE_ASM_WRITTEN (DECL_ASSEMBLER_NAME (decl)) = 1;
-
- if (lookup_attribute ("weakref", DECL_ATTRIBUTES (decl)))
- {
- ultimate_transparent_alias_target (&target);
-
- if (!TREE_SYMBOL_REFERENCED (target))
- weakref_targets = tree_cons (decl, target, weakref_targets);
-
-#ifdef ASM_OUTPUT_WEAKREF
- ASM_OUTPUT_WEAKREF (asm_out_file, decl,
- IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)),
- IDENTIFIER_POINTER (target));
-#else
- if (!SUPPORTS_WEAK)
- {
- error ("%Jweakref is not supported in this configuration", decl);
- return;
- }
-#endif
- return;
- }
-
-#ifdef ASM_OUTPUT_DEF
- /* Make name accessible from other files, if appropriate. */
-
- if (TREE_PUBLIC (decl))
- {
- globalize_decl (decl);
- maybe_assemble_visibility (decl);
- }
-
-# ifdef ASM_OUTPUT_DEF_FROM_DECLS
- ASM_OUTPUT_DEF_FROM_DECLS (asm_out_file, decl, target);
-# else
- ASM_OUTPUT_DEF (asm_out_file,
- IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)),
- IDENTIFIER_POINTER (target));
-# endif
-#elif defined (ASM_OUTPUT_WEAK_ALIAS) || defined (ASM_WEAKEN_DECL)
- {
- const char *name;
- tree *p, t;
-
- name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
-# ifdef ASM_WEAKEN_DECL
- ASM_WEAKEN_DECL (asm_out_file, decl, name, IDENTIFIER_POINTER (target));
-# else
- ASM_OUTPUT_WEAK_ALIAS (asm_out_file, name, IDENTIFIER_POINTER (target));
-# endif
- /* Remove this function from the pending weak list so that
- we do not emit multiple .weak directives for it. */
- for (p = &weak_decls; (t = *p) ; )
- if (DECL_ASSEMBLER_NAME (decl) == DECL_ASSEMBLER_NAME (TREE_VALUE (t)))
- *p = TREE_CHAIN (t);
- else
- p = &TREE_CHAIN (t);
-
- /* Remove weakrefs to the same target from the pending weakref
- list, for the same reason. */
- for (p = &weakref_targets; (t = *p) ; )
- {
- if (DECL_ASSEMBLER_NAME (decl)
- == ultimate_transparent_alias_target (&TREE_VALUE (t)))
- *p = TREE_CHAIN (t);
- else
- p = &TREE_CHAIN (t);
- }
- }
-#endif
-}
-
-/* First pass of completing pending aliases. Make sure that cgraph knows
- which symbols will be required. */
-
-void
-finish_aliases_1 (void)
-{
- unsigned i;
- alias_pair *p;
-
- for (i = 0; VEC_iterate (alias_pair, alias_pairs, i, p); i++)
- {
- tree target_decl;
-
- target_decl = find_decl_and_mark_needed (p->decl, p->target);
- if (target_decl == NULL)
- {
- if (! lookup_attribute ("weakref", DECL_ATTRIBUTES (p->decl)))
- error ("%q+D aliased to undefined symbol %qs",
- p->decl, IDENTIFIER_POINTER (p->target));
- }
- else if (DECL_EXTERNAL (target_decl)
- && ! lookup_attribute ("weakref", DECL_ATTRIBUTES (p->decl)))
- error ("%q+D aliased to external symbol %qs",
- p->decl, IDENTIFIER_POINTER (p->target));
- }
-}
-
-/* Second pass of completing pending aliases. Emit the actual assembly.
- This happens at the end of compilation and thus it is assured that the
- target symbol has been emitted. */
-
-void
-finish_aliases_2 (void)
-{
- unsigned i;
- alias_pair *p;
-
- for (i = 0; VEC_iterate (alias_pair, alias_pairs, i, p); i++)
- do_assemble_alias (p->decl, p->target);
-
- VEC_truncate (alias_pair, alias_pairs, 0);
-}
-
-/* Emit an assembler directive to make the symbol for DECL an alias to
- the symbol for TARGET. */
-
-void
-assemble_alias (tree decl, tree target)
-{
- tree target_decl;
- bool is_weakref = false;
-
- if (lookup_attribute ("weakref", DECL_ATTRIBUTES (decl)))
- {
- tree alias = DECL_ASSEMBLER_NAME (decl);
-
- is_weakref = true;
-
- ultimate_transparent_alias_target (&target);
-
- if (alias == target)
- error ("weakref %q+D ultimately targets itself", decl);
- else
- {
-#ifndef ASM_OUTPUT_WEAKREF
- IDENTIFIER_TRANSPARENT_ALIAS (alias) = 1;
- TREE_CHAIN (alias) = target;
-#endif
- }
- if (TREE_PUBLIC (decl))
- error ("weakref %q+D must have static linkage", decl);
- }
- else
- {
-#if !defined (ASM_OUTPUT_DEF)
-# if !defined(ASM_OUTPUT_WEAK_ALIAS) && !defined (ASM_WEAKEN_DECL)
- error ("%Jalias definitions not supported in this configuration", decl);
- return;
-# else
- if (!DECL_WEAK (decl))
- {
- error ("%Jonly weak aliases are supported in this configuration", decl);
- return;
- }
-# endif
-#endif
- }
-
- /* We must force creation of DECL_RTL for debug info generation, even though
- we don't use it here. */
- make_decl_rtl (decl);
- TREE_USED (decl) = 1;
-
- /* A quirk of the initial implementation of aliases required that the user
- add "extern" to all of them. Which is silly, but now historical. Do
- note that the symbol is in fact locally defined. */
- if (! is_weakref)
- DECL_EXTERNAL (decl) = 0;
-
- /* Allow aliases to aliases. */
- if (TREE_CODE (decl) == FUNCTION_DECL)
- cgraph_node (decl)->alias = true;
- else
- cgraph_varpool_node (decl)->alias = true;
-
- /* If the target has already been emitted, we don't have to queue the
- alias. This saves a tad o memory. */
- target_decl = find_decl_and_mark_needed (decl, target);
- if (target_decl && TREE_ASM_WRITTEN (target_decl))
- do_assemble_alias (decl, target);
- else
- {
- alias_pair *p = VEC_safe_push (alias_pair, gc, alias_pairs, NULL);
- p->decl = decl;
- p->target = target;
- }
-}
-
-/* Emit an assembler directive to set symbol for DECL visibility to
- the visibility type VIS, which must not be VISIBILITY_DEFAULT. */
-
-void
-default_assemble_visibility (tree decl, int vis)
-{
- static const char * const visibility_types[] = {
- NULL, "protected", "hidden", "internal"
- };
-
- const char *name, *type;
-
- name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
- type = visibility_types[vis];
-
-#ifdef HAVE_GAS_HIDDEN
- fprintf (asm_out_file, "\t.%s\t", type);
- assemble_name (asm_out_file, name);
- fprintf (asm_out_file, "\n");
-#else
- warning (OPT_Wattributes, "visibility attribute not supported "
- "in this configuration; ignored");
-#endif
-}
-
-/* A helper function to call assemble_visibility when needed for a decl. */
-
-static void
-maybe_assemble_visibility (tree decl)
-{
- enum symbol_visibility vis = DECL_VISIBILITY (decl);
-
- if (vis != VISIBILITY_DEFAULT)
- targetm.asm_out.visibility (decl, vis);
-}
-
-/* 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. */
-
-int
-supports_one_only (void)
-{
- if (SUPPORTS_ONE_ONLY)
- return 1;
- return SUPPORTS_WEAK;
-}
-
-/* Set up DECL as a public symbol that can be defined in multiple
- translation units without generating a linker error. */
-
-void
-make_decl_one_only (tree decl)
-{
- gcc_assert (TREE_CODE (decl) == VAR_DECL
- || TREE_CODE (decl) == FUNCTION_DECL);
-
- TREE_PUBLIC (decl) = 1;
-
- if (SUPPORTS_ONE_ONLY)
- {
-#ifdef MAKE_DECL_ONE_ONLY
- MAKE_DECL_ONE_ONLY (decl);
-#endif
- DECL_ONE_ONLY (decl) = 1;
- }
- else if (TREE_CODE (decl) == VAR_DECL
- && (DECL_INITIAL (decl) == 0 || DECL_INITIAL (decl) == error_mark_node))
- DECL_COMMON (decl) = 1;
- else
- {
- gcc_assert (SUPPORTS_WEAK);
- DECL_WEAK (decl) = 1;
- }
-}
-
-void
-init_varasm_once (void)
-{
- section_htab = htab_create_ggc (31, section_entry_hash,
- section_entry_eq, NULL);
- object_block_htab = htab_create_ggc (31, object_block_entry_hash,
- object_block_entry_eq, NULL);
- const_desc_htab = htab_create_ggc (1009, const_desc_hash,
- const_desc_eq, NULL);
-
- const_alias_set = new_alias_set ();
- shared_constant_pool = create_constant_pool ();
-
-#ifdef TEXT_SECTION_ASM_OP
- text_section = get_unnamed_section (SECTION_CODE, output_section_asm_op,
- TEXT_SECTION_ASM_OP);
-#endif
-
-#ifdef DATA_SECTION_ASM_OP
- data_section = get_unnamed_section (SECTION_WRITE, output_section_asm_op,
- DATA_SECTION_ASM_OP);
-#endif
-
-#ifdef SDATA_SECTION_ASM_OP
- sdata_section = get_unnamed_section (SECTION_WRITE, output_section_asm_op,
- SDATA_SECTION_ASM_OP);
-#endif
-
-#ifdef READONLY_DATA_SECTION_ASM_OP
- readonly_data_section = get_unnamed_section (0, output_section_asm_op,
- READONLY_DATA_SECTION_ASM_OP);
-#endif
-
-#ifdef CTORS_SECTION_ASM_OP
- ctors_section = get_unnamed_section (0, output_section_asm_op,
- CTORS_SECTION_ASM_OP);
-#endif
-
-#ifdef DTORS_SECTION_ASM_OP
- dtors_section = get_unnamed_section (0, output_section_asm_op,
- DTORS_SECTION_ASM_OP);
-#endif
-
-#ifdef BSS_SECTION_ASM_OP
- bss_section = get_unnamed_section (SECTION_WRITE | SECTION_BSS,
- output_section_asm_op,
- BSS_SECTION_ASM_OP);
-#endif
-
-#ifdef SBSS_SECTION_ASM_OP
- sbss_section = get_unnamed_section (SECTION_WRITE | SECTION_BSS,
- output_section_asm_op,
- SBSS_SECTION_ASM_OP);
-#endif
-
- tls_comm_section = get_noswitch_section (SECTION_WRITE | SECTION_BSS
- | SECTION_COMMON, emit_tls_common);
- lcomm_section = get_noswitch_section (SECTION_WRITE | SECTION_BSS
- | SECTION_COMMON, emit_local);
- comm_section = get_noswitch_section (SECTION_WRITE | SECTION_BSS
- | SECTION_COMMON, emit_common);
-
-#if defined ASM_OUTPUT_ALIGNED_BSS || defined ASM_OUTPUT_BSS
- bss_noswitch_section = get_noswitch_section (SECTION_WRITE | SECTION_BSS,
- emit_bss);
-#endif
-
- targetm.asm_out.init_sections ();
-
- if (readonly_data_section == NULL)
- readonly_data_section = text_section;
-}
-
-enum tls_model
-decl_default_tls_model (tree decl)
-{
- enum tls_model kind;
- bool is_local;
-
- is_local = targetm.binds_local_p (decl);
- if (!flag_shlib)
- {
- if (is_local)
- kind = TLS_MODEL_LOCAL_EXEC;
- else
- kind = TLS_MODEL_INITIAL_EXEC;
- }
-
- /* Local dynamic is inefficient when we're not combining the
- parts of the address. */
- else if (optimize && is_local)
- kind = TLS_MODEL_LOCAL_DYNAMIC;
- else
- kind = TLS_MODEL_GLOBAL_DYNAMIC;
- if (kind < flag_tls_default)
- kind = flag_tls_default;
-
- return kind;
-}
-
-/* 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. */
-
-unsigned int
-default_section_type_flags (tree decl, const char *name, int reloc)
-{
- unsigned int flags;
-
- if (decl && TREE_CODE (decl) == FUNCTION_DECL)
- flags = SECTION_CODE;
- else if (decl && decl_readonly_section (decl, reloc))
- flags = 0;
- else if (current_function_decl
- && cfun
- && cfun->unlikely_text_section_name
- && strcmp (name, cfun->unlikely_text_section_name) == 0)
- flags = SECTION_CODE;
- else if (!decl
- && (!current_function_decl || !cfun)
- && strcmp (name, UNLIKELY_EXECUTED_TEXT_SECTION_NAME) == 0)
- flags = SECTION_CODE;
- else
- flags = SECTION_WRITE;
-
- if (decl && DECL_ONE_ONLY (decl))
- flags |= SECTION_LINKONCE;
-
- if (decl && TREE_CODE (decl) == VAR_DECL && DECL_THREAD_LOCAL_P (decl))
- flags |= SECTION_TLS | SECTION_WRITE;
-
- if (strcmp (name, ".bss") == 0
- || strncmp (name, ".bss.", 5) == 0
- || strncmp (name, ".gnu.linkonce.b.", 16) == 0
- || strcmp (name, ".sbss") == 0
- || strncmp (name, ".sbss.", 6) == 0
- || strncmp (name, ".gnu.linkonce.sb.", 17) == 0)
- flags |= SECTION_BSS;
-
- if (strcmp (name, ".tdata") == 0
- || strncmp (name, ".tdata.", 7) == 0
- || strncmp (name, ".gnu.linkonce.td.", 17) == 0)
- flags |= SECTION_TLS;
-
- if (strcmp (name, ".tbss") == 0
- || strncmp (name, ".tbss.", 6) == 0
- || strncmp (name, ".gnu.linkonce.tb.", 17) == 0)
- flags |= SECTION_TLS | SECTION_BSS;
-
- /* 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. */
- if (!(flags & (SECTION_CODE | SECTION_BSS | SECTION_TLS))
- && (strcmp (name, ".init_array") == 0
- || strcmp (name, ".fini_array") == 0
- || strcmp (name, ".preinit_array") == 0))
- flags |= SECTION_NOTYPE;
-
- return flags;
-}
-
-/* Return true if the target supports some form of global BSS,
- either through bss_noswitch_section, or by selecting a BSS
- section in TARGET_ASM_SELECT_SECTION. */
-
-bool
-have_global_bss_p (void)
-{
- return bss_noswitch_section || targetm.have_switchable_bss_sections;
-}
-
-/* Output assembly to switch to section NAME with attribute FLAGS.
- Four variants for common object file formats. */
-
-void
-default_no_named_section (const char *name ATTRIBUTE_UNUSED,
- unsigned int flags ATTRIBUTE_UNUSED,
- tree decl ATTRIBUTE_UNUSED)
-{
- /* Some object formats don't support named sections at all. The
- front-end should already have flagged this as an error. */
- gcc_unreachable ();
-}
-
-void
-default_elf_asm_named_section (const char *name, unsigned int flags,
- tree decl ATTRIBUTE_UNUSED)
-{
- char flagchars[10], *f = flagchars;
-
- /* 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. */
- if (!(HAVE_COMDAT_GROUP && (flags & SECTION_LINKONCE))
- && (flags & SECTION_DECLARED))
- {
- fprintf (asm_out_file, "\t.section\t%s\n", name);
- return;
- }
-
- if (!(flags & SECTION_DEBUG))
- *f++ = 'a';
- if (flags & SECTION_WRITE)
- *f++ = 'w';
- if (flags & SECTION_CODE)
- *f++ = 'x';
- if (flags & SECTION_SMALL)
- *f++ = 's';
- if (flags & SECTION_MERGE)
- *f++ = 'M';
- if (flags & SECTION_STRINGS)
- *f++ = 'S';
- if (flags & SECTION_TLS)
- *f++ = 'T';
- if (HAVE_COMDAT_GROUP && (flags & SECTION_LINKONCE))
- *f++ = 'G';
- *f = '\0';
-
- fprintf (asm_out_file, "\t.section\t%s,\"%s\"", name, flagchars);
-
- if (!(flags & SECTION_NOTYPE))
- {
- const char *type;
- const char *format;
-
- if (flags & SECTION_BSS)
- type = "nobits";
- else
- type = "progbits";
-
- format = ",@%s";
-#ifdef ASM_COMMENT_START
- /* On platforms that use "@" as the assembly comment character,
- use "%" instead. */
- if (strcmp (ASM_COMMENT_START, "@") == 0)
- format = ",%%%s";
-#endif
- fprintf (asm_out_file, format, type);
-
- if (flags & SECTION_ENTSIZE)
- fprintf (asm_out_file, ",%d", flags & SECTION_ENTSIZE);
- if (HAVE_COMDAT_GROUP && (flags & SECTION_LINKONCE))
- fprintf (asm_out_file, ",%s,comdat",
- lang_hooks.decls.comdat_group (decl));
- }
-
- putc ('\n', asm_out_file);
-}
-
-void
-default_coff_asm_named_section (const char *name, unsigned int flags,
- tree decl ATTRIBUTE_UNUSED)
-{
- char flagchars[8], *f = flagchars;
-
- if (flags & SECTION_WRITE)
- *f++ = 'w';
- if (flags & SECTION_CODE)
- *f++ = 'x';
- *f = '\0';
-
- fprintf (asm_out_file, "\t.section\t%s,\"%s\"\n", name, flagchars);
-}
-
-void
-default_pe_asm_named_section (const char *name, unsigned int flags,
- tree decl)
-{
- default_coff_asm_named_section (name, flags, decl);
-
- if (flags & SECTION_LINKONCE)
- {
- /* Functions may have been compiled at various levels of
- optimization so we can't use `same_size' here.
- Instead, have the linker pick one. */
- fprintf (asm_out_file, "\t.linkonce %s\n",
- (flags & SECTION_CODE ? "discard" : "same_size"));
- }
-}
-
-/* The lame default section selector. */
-
-section *
-default_select_section (tree decl, int reloc,
- unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED)
-{
- if (DECL_P (decl))
- {
- if (decl_readonly_section (decl, reloc))
- return readonly_data_section;
- }
- else if (TREE_CODE (decl) == CONSTRUCTOR)
- {
- if (! ((flag_pic && reloc)
- || !TREE_READONLY (decl)
- || TREE_SIDE_EFFECTS (decl)
- || !TREE_CONSTANT (decl)))
- return readonly_data_section;
- }
- else if (TREE_CODE (decl) == STRING_CST)
- /* APPLE LOCAL begin fwritable strings */
- {
- if (! flag_writable_strings)
- return readonly_data_section;
- }
- /* APPLE LOCAL end fwritable strings */
- else if (! (flag_pic && reloc))
- return readonly_data_section;
-
- return data_section;
-}
-
-enum section_category
-categorize_decl_for_section (tree decl, int reloc)
-{
- enum section_category ret;
-
- if (TREE_CODE (decl) == FUNCTION_DECL)
- return SECCAT_TEXT;
- else if (TREE_CODE (decl) == STRING_CST)
- {
- /* APPLE LOCAL begin fwritable strings */
- if (flag_writable_strings)
- return SECCAT_DATA;
- /* APPLE LOCAL end fwritable strings */
- if (flag_mudflap) /* or !flag_merge_constants */
- return SECCAT_RODATA;
- else
- return SECCAT_RODATA_MERGE_STR;
- }
- else if (TREE_CODE (decl) == VAR_DECL)
- {
- if (bss_initializer_p (decl))
- ret = SECCAT_BSS;
- else if (! TREE_READONLY (decl)
- || TREE_SIDE_EFFECTS (decl)
- || ! TREE_CONSTANT (DECL_INITIAL (decl)))
- {
- /* 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. */
- if (reloc & targetm.asm_out.reloc_rw_mask ())
- ret = reloc == 1 ? SECCAT_DATA_REL_LOCAL : SECCAT_DATA_REL;
- else
- ret = SECCAT_DATA;
- }
- else if (reloc & targetm.asm_out.reloc_rw_mask ())
- ret = reloc == 1 ? SECCAT_DATA_REL_RO_LOCAL : SECCAT_DATA_REL_RO;
- else if (reloc || flag_merge_constants < 2)
- /* 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). */
- ret = SECCAT_RODATA;
- else if (TREE_CODE (DECL_INITIAL (decl)) == STRING_CST)
- ret = SECCAT_RODATA_MERGE_STR_INIT;
- else
- ret = SECCAT_RODATA_MERGE_CONST;
- }
- else if (TREE_CODE (decl) == CONSTRUCTOR)
- {
- if ((reloc & targetm.asm_out.reloc_rw_mask ())
- || TREE_SIDE_EFFECTS (decl)
- || ! TREE_CONSTANT (decl))
- ret = SECCAT_DATA;
- else
- ret = SECCAT_RODATA;
- }
- else
- ret = SECCAT_RODATA;
-
- /* There are no read-only thread-local sections. */
- if (TREE_CODE (decl) == VAR_DECL && DECL_THREAD_LOCAL_P (decl))
- {
- /* Note that this would be *just* SECCAT_BSS, except that there's
- no concept of a read-only thread-local-data section. */
- if (ret == SECCAT_BSS
- || (flag_zero_initialized_in_bss
- && initializer_zerop (DECL_INITIAL (decl))))
- ret = SECCAT_TBSS;
- else
- ret = SECCAT_TDATA;
- }
-
- /* If the target uses small data sections, select it. */
- else if (targetm.in_small_data_p (decl))
- {
- if (ret == SECCAT_BSS)
- ret = SECCAT_SBSS;
- else if (targetm.have_srodata_section && ret == SECCAT_RODATA)
- ret = SECCAT_SRODATA;
- else
- ret = SECCAT_SDATA;
- }
-
- return ret;
-}
-
-bool
-decl_readonly_section (tree decl, int reloc)
-{
- switch (categorize_decl_for_section (decl, reloc))
- {
- case SECCAT_RODATA:
- case SECCAT_RODATA_MERGE_STR:
- case SECCAT_RODATA_MERGE_STR_INIT:
- case SECCAT_RODATA_MERGE_CONST:
- case SECCAT_SRODATA:
- return true;
- break;
- default:
- return false;
- break;
- }
-}
-
-/* Select a section based on the above categorization. */
-
-section *
-default_elf_select_section (tree decl, int reloc,
- unsigned HOST_WIDE_INT align)
-{
- const char *sname;
- switch (categorize_decl_for_section (decl, reloc))
- {
- case SECCAT_TEXT:
- /* We're not supposed to be called on FUNCTION_DECLs. */
- gcc_unreachable ();
- case SECCAT_RODATA:
- return readonly_data_section;
- case SECCAT_RODATA_MERGE_STR:
- return mergeable_string_section (decl, align, 0);
- case SECCAT_RODATA_MERGE_STR_INIT:
- return mergeable_string_section (DECL_INITIAL (decl), align, 0);
- case SECCAT_RODATA_MERGE_CONST:
- return mergeable_constant_section (DECL_MODE (decl), align, 0);
- case SECCAT_SRODATA:
- sname = ".sdata2";
- break;
- case SECCAT_DATA:
- return data_section;
- case SECCAT_DATA_REL:
- sname = ".data.rel";
- break;
- case SECCAT_DATA_REL_LOCAL:
- sname = ".data.rel.local";
- break;
- case SECCAT_DATA_REL_RO:
- sname = ".data.rel.ro";
- break;
- case SECCAT_DATA_REL_RO_LOCAL:
- sname = ".data.rel.ro.local";
- break;
- case SECCAT_SDATA:
- sname = ".sdata";
- break;
- case SECCAT_TDATA:
- sname = ".tdata";
- break;
- case SECCAT_BSS:
- if (bss_section)
- return bss_section;
- sname = ".bss";
- break;
- case SECCAT_SBSS:
- sname = ".sbss";
- break;
- case SECCAT_TBSS:
- sname = ".tbss";
- break;
- default:
- gcc_unreachable ();
- }
-
- if (!DECL_P (decl))
- decl = NULL_TREE;
- return get_named_section (decl, sname, reloc);
-}
-
-/* Construct a unique section name based on the decl name and the
- categorization performed above. */
-
-void
-default_unique_section (tree decl, int reloc)
-{
- /* We only need to use .gnu.linkonce if we don't have COMDAT groups. */
- bool one_only = DECL_ONE_ONLY (decl) && !HAVE_COMDAT_GROUP;
- const char *prefix, *name;
- size_t nlen, plen;
- char *string;
-
- switch (categorize_decl_for_section (decl, reloc))
- {
- case SECCAT_TEXT:
- prefix = one_only ? ".gnu.linkonce.t." : ".text.";
- break;
- case SECCAT_RODATA:
- case SECCAT_RODATA_MERGE_STR:
- case SECCAT_RODATA_MERGE_STR_INIT:
- case SECCAT_RODATA_MERGE_CONST:
- prefix = one_only ? ".gnu.linkonce.r." : ".rodata.";
- break;
- case SECCAT_SRODATA:
- prefix = one_only ? ".gnu.linkonce.s2." : ".sdata2.";
- break;
- case SECCAT_DATA:
- prefix = one_only ? ".gnu.linkonce.d." : ".data.";
- break;
- case SECCAT_DATA_REL:
- prefix = one_only ? ".gnu.linkonce.d.rel." : ".data.rel.";
- break;
- case SECCAT_DATA_REL_LOCAL:
- prefix = one_only ? ".gnu.linkonce.d.rel.local." : ".data.rel.local.";
- break;
- case SECCAT_DATA_REL_RO:
- prefix = one_only ? ".gnu.linkonce.d.rel.ro." : ".data.rel.ro.";
- break;
- case SECCAT_DATA_REL_RO_LOCAL:
- prefix = one_only ? ".gnu.linkonce.d.rel.ro.local."
- : ".data.rel.ro.local.";
- break;
- case SECCAT_SDATA:
- prefix = one_only ? ".gnu.linkonce.s." : ".sdata.";
- break;
- case SECCAT_BSS:
- prefix = one_only ? ".gnu.linkonce.b." : ".bss.";
- break;
- case SECCAT_SBSS:
- prefix = one_only ? ".gnu.linkonce.sb." : ".sbss.";
- break;
- case SECCAT_TDATA:
- prefix = one_only ? ".gnu.linkonce.td." : ".tdata.";
- break;
- case SECCAT_TBSS:
- prefix = one_only ? ".gnu.linkonce.tb." : ".tbss.";
- break;
- default:
- gcc_unreachable ();
- }
- plen = strlen (prefix);
-
- name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
- name = targetm.strip_name_encoding (name);
- nlen = strlen (name);
-
- string = alloca (nlen + plen + 1);
- memcpy (string, prefix, plen);
- memcpy (string + plen, name, nlen + 1);
-
- DECL_SECTION_NAME (decl) = build_string (nlen + plen, string);
-}
-
-/* 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. */
-
-static int
-compute_reloc_for_rtx_1 (rtx *xp, void *data)
-{
- int *preloc = data;
- rtx x = *xp;
-
- switch (GET_CODE (x))
- {
- case SYMBOL_REF:
- *preloc |= SYMBOL_REF_LOCAL_P (x) ? 1 : 2;
- break;
- case LABEL_REF:
- *preloc |= 1;
- break;
- default:
- break;
- }
-
- return 0;
-}
-
-static int
-compute_reloc_for_rtx (rtx x)
-{
- int reloc;
-
- switch (GET_CODE (x))
- {
- case CONST:
- case SYMBOL_REF:
- case LABEL_REF:
- reloc = 0;
- for_each_rtx (&x, compute_reloc_for_rtx_1, &reloc);
- return reloc;
-
- default:
- return 0;
- }
-}
-
-section *
-default_select_rtx_section (enum machine_mode mode ATTRIBUTE_UNUSED,
- rtx x,
- unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED)
-{
- if (compute_reloc_for_rtx (x) & targetm.asm_out.reloc_rw_mask ())
- return data_section;
- else
- return readonly_data_section;
-}
-
-section *
-default_elf_select_rtx_section (enum machine_mode mode, rtx x,
- unsigned HOST_WIDE_INT align)
-{
- int reloc = compute_reloc_for_rtx (x);
-
- /* ??? Handle small data here somehow. */
-
- if (reloc & targetm.asm_out.reloc_rw_mask ())
- {
- if (reloc == 1)
- return get_named_section (NULL, ".data.rel.ro.local", 1);
- else
- return get_named_section (NULL, ".data.rel.ro", 3);
- }
-
- return mergeable_constant_section (mode, align, 0);
-}
-
-/* Set the generally applicable flags on the SYMBOL_REF for EXP. */
-
-void
-default_encode_section_info (tree decl, rtx rtl, int first ATTRIBUTE_UNUSED)
-{
- rtx symbol;
- int flags;
-
- /* Careful not to prod global register variables. */
- if (!MEM_P (rtl))
- return;
- symbol = XEXP (rtl, 0);
- if (GET_CODE (symbol) != SYMBOL_REF)
- return;
-
- flags = SYMBOL_REF_FLAGS (symbol) & SYMBOL_FLAG_HAS_BLOCK_INFO;
- if (TREE_CODE (decl) == FUNCTION_DECL)
- flags |= SYMBOL_FLAG_FUNCTION;
- if (targetm.binds_local_p (decl))
- flags |= SYMBOL_FLAG_LOCAL;
- if (TREE_CODE (decl) == VAR_DECL && DECL_THREAD_LOCAL_P (decl))
- flags |= DECL_TLS_MODEL (decl) << SYMBOL_FLAG_TLS_SHIFT;
- else if (targetm.in_small_data_p (decl))
- flags |= SYMBOL_FLAG_SMALL;
- /* ??? 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. */
- if (DECL_P (decl) && DECL_EXTERNAL (decl) && TREE_PUBLIC (decl))
- flags |= SYMBOL_FLAG_EXTERNAL;
-
- SYMBOL_REF_FLAGS (symbol) = flags;
-}
-
-/* By default, we do nothing for encode_section_info, so we need not
- do anything but discard the '*' marker. */
-
-const char *
-default_strip_name_encoding (const char *str)
-{
- return str + (*str == '*');
-}
-
-#ifdef ASM_OUTPUT_DEF
-/* The default implementation of TARGET_ASM_OUTPUT_ANCHOR. Define the
- anchor relative to ".", the current section position. */
-
-void
-default_asm_output_anchor (rtx symbol)
-{
- char buffer[100];
-
- sprintf (buffer, ". + " HOST_WIDE_INT_PRINT_DEC,
- SYMBOL_REF_BLOCK_OFFSET (symbol));
- ASM_OUTPUT_DEF (asm_out_file, XSTR (symbol, 0), buffer);
-}
-#endif
-
-/* The default implementation of TARGET_USE_ANCHORS_FOR_SYMBOL_P. */
-
-bool
-default_use_anchors_for_symbol_p (rtx symbol)
-{
- section *sect;
- tree decl;
-
- /* Don't use anchors for mergeable sections. The linker might move
- the objects around. */
- sect = SYMBOL_REF_BLOCK (symbol)->sect;
- if (sect->common.flags & SECTION_MERGE)
- return false;
-
- /* Don't use anchors for small data sections. The small data register
- acts as an anchor for such sections. */
- if (sect->common.flags & SECTION_SMALL)
- return false;
-
- decl = SYMBOL_REF_DECL (symbol);
- if (decl && DECL_P (decl))
- {
- /* Don't use section anchors for decls that might be defined by
- other modules. */
- if (!targetm.binds_local_p (decl))
- return false;
-
- /* 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. */
- if (targetm.in_small_data_p (decl))
- return false;
- }
- return true;
-}
-
-/* Assume ELF-ish defaults, since that's pretty much the most liberal
- wrt cross-module name binding. */
-
-bool
-default_binds_local_p (tree exp)
-{
- return default_binds_local_p_1 (exp, flag_shlib);
-}
-
-bool
-default_binds_local_p_1 (tree exp, int shlib)
-{
- bool local_p;
-
- /* A non-decl is an entry in the constant pool. */
- if (!DECL_P (exp))
- local_p = true;
- /* Weakrefs may not bind locally, even though the weakref itself is
- always static and therefore local. */
- else if (lookup_attribute ("weakref", DECL_ATTRIBUTES (exp)))
- local_p = false;
- /* Static variables are always local. */
- else if (! TREE_PUBLIC (exp))
- local_p = true;
- /* A variable is local if the user has said explicitly that it will
- be. */
- else if (DECL_VISIBILITY_SPECIFIED (exp)
- && DECL_VISIBILITY (exp) != VISIBILITY_DEFAULT)
- local_p = true;
- /* Variables defined outside this object might not be local. */
- else if (DECL_EXTERNAL (exp))
- local_p = false;
- /* If defined in this object and visibility is not default, must be
- local. */
- else if (DECL_VISIBILITY (exp) != VISIBILITY_DEFAULT)
- local_p = true;
- /* Default visibility weak data can be overridden by a strong symbol
- in another module and so are not local. */
- else if (DECL_WEAK (exp))
- local_p = false;
- /* If PIC, then assume that any global name can be overridden by
- symbols resolved from other modules. */
- else if (shlib)
- local_p = false;
- /* Uninitialized COMMON variable may be unified with symbols
- resolved from other modules. */
- else if (DECL_COMMON (exp)
- && (DECL_INITIAL (exp) == NULL
- || DECL_INITIAL (exp) == error_mark_node))
- local_p = false;
- /* Otherwise we're left with initialized (or non-common) global data
- which is of necessity defined locally. */
- else
- local_p = true;
-
- return local_p;
-}
-
-/* Determine whether or not a pointer mode is valid. Assume defaults
- of ptr_mode or Pmode - can be overridden. */
-bool
-default_valid_pointer_mode (enum machine_mode mode)
-{
- return (mode == ptr_mode || mode == Pmode);
-}
-
-/* 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. */
-#ifdef GLOBAL_ASM_OP
-void
-default_globalize_label (FILE * stream, const char *name)
-{
- fputs (GLOBAL_ASM_OP, stream);
- assemble_name (stream, name);
- putc ('\n', stream);
-}
-#endif /* GLOBAL_ASM_OP */
-
-/* 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_emit_unwind_label (FILE * stream ATTRIBUTE_UNUSED,
- tree decl ATTRIBUTE_UNUSED,
- int for_eh ATTRIBUTE_UNUSED,
- int empty ATTRIBUTE_UNUSED)
-{
-}
-
-/* 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_except_table_label (FILE * stream ATTRIBUTE_UNUSED)
-{
-}
-
-/* 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_internal_label (FILE *stream, const char *prefix,
- unsigned long labelno)
-{
- char *const buf = alloca (40 + strlen (prefix));
- ASM_GENERATE_INTERNAL_LABEL (buf, prefix, labelno);
- ASM_OUTPUT_INTERNAL_LABEL (stream, buf);
-}
-
-/* This is the default behavior at the beginning of a file. It's
- controlled by two other target-hook toggles. */
-void
-default_file_start (void)
-{
- if (targetm.file_start_app_off && !flag_verbose_asm)
- fputs (ASM_APP_OFF, asm_out_file);
-
- if (targetm.file_start_file_directive)
- output_file_directive (asm_out_file, main_input_filename);
-}
-
-/* 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. */
-
-int trampolines_created;
-
-void
-file_end_indicate_exec_stack (void)
-{
- unsigned int flags = SECTION_DEBUG;
- if (trampolines_created)
- flags |= SECTION_CODE;
-
- switch_to_section (get_section (".note.GNU-stack", flags, NULL));
-}
-
-/* Output DIRECTIVE (a C string) followed by a newline. This is used as
- a get_unnamed_section callback. */
-
-void
-output_section_asm_op (const void *directive)
-{
- fprintf (asm_out_file, "%s\n", (const char *) directive);
-}
-
-/* Emit assembly code to switch to section NEW_SECTION. Do nothing if
- the current section is NEW_SECTION. */
-
-void
-switch_to_section (section *new_section)
-{
- if (in_section == new_section)
- return;
-
- if (new_section->common.flags & SECTION_FORGET)
- in_section = NULL;
- else
- in_section = new_section;
-
- switch (SECTION_STYLE (new_section))
- {
- case SECTION_NAMED:
- if (cfun
- && !cfun->unlikely_text_section_name
- && strcmp (new_section->named.name,
- UNLIKELY_EXECUTED_TEXT_SECTION_NAME) == 0)
- cfun->unlikely_text_section_name = UNLIKELY_EXECUTED_TEXT_SECTION_NAME;
-
- targetm.asm_out.named_section (new_section->named.name,
- new_section->named.common.flags,
- new_section->named.decl);
- break;
-
- case SECTION_UNNAMED:
- new_section->unnamed.callback (new_section->unnamed.data);
- break;
-
- case SECTION_NOSWITCH:
- gcc_unreachable ();
- break;
- }
-
- new_section->common.flags |= SECTION_DECLARED;
-}
-
-/* If block symbol SYMBOL has not yet been assigned an offset, place
- it at the end of its block. */
-
-void
-place_block_symbol (rtx symbol)
-{
- unsigned HOST_WIDE_INT size, mask, offset;
- struct constant_descriptor_rtx *desc;
- unsigned int alignment;
- struct object_block *block;
- tree decl;
-
- gcc_assert (SYMBOL_REF_BLOCK (symbol));
- if (SYMBOL_REF_BLOCK_OFFSET (symbol) >= 0)
- return;
-
- /* Work out the symbol's size and alignment. */
- if (CONSTANT_POOL_ADDRESS_P (symbol))
- {
- desc = SYMBOL_REF_CONSTANT (symbol);
- alignment = desc->align;
- size = GET_MODE_SIZE (desc->mode);
- }
- else if (TREE_CONSTANT_POOL_ADDRESS_P (symbol))
- {
- decl = SYMBOL_REF_DECL (symbol);
- alignment = get_constant_alignment (decl);
- size = get_constant_size (decl);
- }
- else
- {
- decl = SYMBOL_REF_DECL (symbol);
- alignment = DECL_ALIGN (decl);
- size = tree_low_cst (DECL_SIZE_UNIT (decl), 1);
- }
-
- /* Calculate the object's offset from the start of the block. */
- block = SYMBOL_REF_BLOCK (symbol);
- mask = alignment / BITS_PER_UNIT - 1;
- offset = (block->size + mask) & ~mask;
- SYMBOL_REF_BLOCK_OFFSET (symbol) = offset;
-
- /* Record the block's new alignment and size. */
- block->alignment = MAX (block->alignment, alignment);
- block->size = offset + size;
-
- VEC_safe_push (rtx, gc, block->objects, symbol);
-}
-
-/* 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. */
-
-rtx
-get_section_anchor (struct object_block *block, HOST_WIDE_INT offset,
- enum tls_model model)
-{
- char label[100];
- unsigned int begin, middle, end;
- unsigned HOST_WIDE_INT min_offset, max_offset, range, bias, delta;
- rtx anchor;
-
- /* 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. */
- max_offset = (unsigned HOST_WIDE_INT) targetm.max_anchor_offset;
- min_offset = (unsigned HOST_WIDE_INT) targetm.min_anchor_offset;
- range = max_offset - min_offset + 1;
- if (range == 0)
- offset = 0;
- else
- {
- bias = 1 << (GET_MODE_BITSIZE (ptr_mode) - 1);
- if (offset < 0)
- {
- delta = -(unsigned HOST_WIDE_INT) offset + max_offset;
- delta -= delta % range;
- if (delta > bias)
- delta = bias;
- offset = (HOST_WIDE_INT) (-delta);
- }
- else
- {
- delta = (unsigned HOST_WIDE_INT) offset - min_offset;
- delta -= delta % range;
- if (delta > bias - 1)
- delta = bias - 1;
- offset = (HOST_WIDE_INT) delta;
- }
- }
-
- /* 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. */
- begin = 0;
- end = VEC_length (rtx, block->anchors);
- while (begin != end)
- {
- middle = (end + begin) / 2;
- anchor = VEC_index (rtx, block->anchors, middle);
- if (SYMBOL_REF_BLOCK_OFFSET (anchor) > offset)
- end = middle;
- else if (SYMBOL_REF_BLOCK_OFFSET (anchor) < offset)
- begin = middle + 1;
- else if (SYMBOL_REF_TLS_MODEL (anchor) > model)
- end = middle;
- else if (SYMBOL_REF_TLS_MODEL (anchor) < model)
- begin = middle + 1;
- else
- return anchor;
- }
-
- /* Create a new anchor with a unique label. */
- ASM_GENERATE_INTERNAL_LABEL (label, "LANCHOR", anchor_labelno++);
- anchor = create_block_symbol (ggc_strdup (label), block, offset);
- SYMBOL_REF_FLAGS (anchor) |= SYMBOL_FLAG_LOCAL | SYMBOL_FLAG_ANCHOR;
- SYMBOL_REF_FLAGS (anchor) |= model << SYMBOL_FLAG_TLS_SHIFT;
-
- /* Insert it at index BEGIN. */
- VEC_safe_insert (rtx, gc, block->anchors, begin, anchor);
- return anchor;
-}
-
-/* Output the objects in BLOCK. */
-
-static void
-output_object_block (struct object_block *block)
-{
- struct constant_descriptor_rtx *desc;
- unsigned int i;
- HOST_WIDE_INT offset;
- tree decl;
- rtx symbol;
-
- if (block->objects == NULL)
- return;
-
- /* Switch to the section and make sure that the first byte is
- suitably aligned. */
- switch_to_section (block->sect);
- assemble_align (block->alignment);
-
- /* Define the values of all anchors relative to the current section
- position. */
- for (i = 0; VEC_iterate (rtx, block->anchors, i, symbol); i++)
- targetm.asm_out.output_anchor (symbol);
-
- /* Output the objects themselves. */
- offset = 0;
- for (i = 0; VEC_iterate (rtx, block->objects, i, symbol); i++)
- {
- /* Move to the object's offset, padding with zeros if necessary. */
- assemble_zeros (SYMBOL_REF_BLOCK_OFFSET (symbol) - offset);
- offset = SYMBOL_REF_BLOCK_OFFSET (symbol);
- if (CONSTANT_POOL_ADDRESS_P (symbol))
- {
- desc = SYMBOL_REF_CONSTANT (symbol);
- output_constant_pool_1 (desc, 1);
- offset += GET_MODE_SIZE (desc->mode);
- }
- else if (TREE_CONSTANT_POOL_ADDRESS_P (symbol))
- {
- decl = SYMBOL_REF_DECL (symbol);
- assemble_constant_contents (decl, XSTR (symbol, 0),
- get_constant_alignment (decl));
- offset += get_constant_size (decl);
- }
- else
- {
- decl = SYMBOL_REF_DECL (symbol);
- assemble_variable_contents (decl, XSTR (symbol, 0), false);
- offset += tree_low_cst (DECL_SIZE_UNIT (decl), 1);
- }
- }
-}
-
-/* A htab_traverse callback used to call output_object_block for
- each member of object_block_htab. */
-
-static int
-output_object_block_htab (void **slot, void *data ATTRIBUTE_UNUSED)
-{
- output_object_block ((struct object_block *) (*slot));
- return 1;
-}
-
-/* Output the definitions of all object_blocks. */
-
-void
-output_object_blocks (void)
-{
- htab_traverse (object_block_htab, output_object_block_htab, NULL);
-}
-
-#include "gt-varasm.h"