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llvm / llvm-archive / 48649d2c83b557841c9e5c978d9ab5af13cb52e5 / . / llvm-gcc-4.0 / gcc / varasm.c
blob: fd28919974a7a813608532fd52901af9b9c9f4a1 [file] [log] [blame]
/* 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
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, 59 Temple Place - Suite 330, Boston, MA
02111-1307, 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"
/* APPLE LOCAL begin LLVM */
#include "llvm.h"
/* APPLE LOCAL end LLVM */
#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. */
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 section label for the
"cold" section of code has been output yet to the assembler. The
label is useful when running gdb. This is part of the optimization that
partitions hot and cold basic blocks into separate sections of the .o
file. */
static bool unlikely_section_label_printed = false;
/* The following global variable indicates the label name to be put at
the start of the first cold section within each function, when
partitioning basic blocks into hot and cold sections. */
static char *unlikely_section_label = NULL;
/* The following global variable indicates the section name to be used
for the current cold section, when partitioning hot and cold basic
blocks into separate sections. */
static char *unlikely_text_section_name = NULL;
/* 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);
static int in_named_entry_eq (const void *, const void *);
static hashval_t in_named_entry_hash (const void *);
#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 bool asm_emit_uninitialised (tree, const char*,
unsigned HOST_WIDE_INT,
unsigned HOST_WIDE_INT);
static void mark_weak (tree);
enum in_section { no_section, in_text, in_unlikely_executed_text, in_data,
in_named
#ifdef BSS_SECTION_ASM_OP
, in_bss
#endif
#ifdef CTORS_SECTION_ASM_OP
, in_ctors
#endif
#ifdef DTORS_SECTION_ASM_OP
, in_dtors
#endif
#ifdef READONLY_DATA_SECTION_ASM_OP
, in_readonly_data
#endif
#ifdef EXTRA_SECTIONS
, EXTRA_SECTIONS
#endif
};
static GTY(()) enum in_section in_section = no_section;
/* 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
/* Text of section name when in_section == in_named. */
static GTY(()) const char *in_named_name;
/* Hash table of flags that have been used for a particular named section. */
struct in_named_entry GTY(())
{
const char *name;
unsigned int flags;
bool declared;
};
static GTY((param_is (struct in_named_entry))) htab_t in_named_htab;
/* Define functions like text_section for any extra sections. */
#ifdef EXTRA_SECTION_FUNCTIONS
EXTRA_SECTION_FUNCTIONS
#endif
/* Tell assembler to switch to text section. */
void
text_section (void)
{
if (in_section != in_text)
{
in_section = in_text;
fprintf (asm_out_file, "%s\n", TEXT_SECTION_ASM_OP);
}
}
/* Tell assembler to switch to unlikely-to-be-executed text section. */
void
unlikely_text_section (void)
{
const char *name;
int len;
if (! unlikely_text_section_name)
{
if (DECL_SECTION_NAME (current_function_decl)
&& (strcmp (TREE_STRING_POINTER (DECL_SECTION_NAME
(current_function_decl)),
HOT_TEXT_SECTION_NAME) != 0)
&& (strcmp (TREE_STRING_POINTER (DECL_SECTION_NAME
(current_function_decl)),
UNLIKELY_EXECUTED_TEXT_SECTION_NAME) != 0))
{
name = TREE_STRING_POINTER (DECL_SECTION_NAME
(current_function_decl));
len = strlen (name);
unlikely_text_section_name = xmalloc ((len + 10) * sizeof (char));
strcpy (unlikely_text_section_name, name);
strcat (unlikely_text_section_name, "_unlikely");
}
else
{
len = strlen (UNLIKELY_EXECUTED_TEXT_SECTION_NAME);
unlikely_text_section_name = xmalloc (len+1 * sizeof (char));
strcpy (unlikely_text_section_name,
UNLIKELY_EXECUTED_TEXT_SECTION_NAME);
}
}
if ((in_section != in_unlikely_executed_text)
&& (in_section != in_named
|| strcmp (in_named_name, unlikely_text_section_name) != 0))
{
named_section (NULL_TREE, unlikely_text_section_name, 0);
in_section = in_unlikely_executed_text;
if (!unlikely_section_label_printed)
{
ASM_OUTPUT_LABEL (asm_out_file, unlikely_section_label);
unlikely_section_label_printed = true;
}
}
}
/* Tell assembler to switch to data section. */
void
data_section (void)
{
if (in_section != in_data)
{
in_section = in_data;
fprintf (asm_out_file, "%s\n", DATA_SECTION_ASM_OP);
}
}
/* Tell assembler to switch to read-only data section. This is normally
the text section. */
void
readonly_data_section (void)
{
#ifdef READONLY_DATA_SECTION
READONLY_DATA_SECTION (); /* Note this can call data_section. */
#else
#ifdef READONLY_DATA_SECTION_ASM_OP
if (in_section != in_readonly_data)
{
in_section = in_readonly_data;
fputs (READONLY_DATA_SECTION_ASM_OP, asm_out_file);
fputc ('\n', asm_out_file);
}
#else
text_section ();
#endif
#endif
}
/* Determine if we're in the text section. */
int
in_text_section (void)
{
return in_section == in_text;
}
/* Determine if we're in the unlikely-to-be-executed text section. */
int
in_unlikely_text_section (void)
{
bool ret_val;
ret_val = ((in_section == in_unlikely_executed_text)
|| (in_section == in_named
&& unlikely_text_section_name
&& strcmp (in_named_name, unlikely_text_section_name) == 0));
return ret_val;
}
/* Determine if we're in the data section. */
int
in_data_section (void)
{
return in_section == in_data;
}
/* Helper routines for maintaining in_named_htab. */
static int
in_named_entry_eq (const void *p1, const void *p2)
{
const struct in_named_entry *old = p1;
const char *new = p2;
return strcmp (old->name, new) == 0;
}
static hashval_t
in_named_entry_hash (const void *p)
{
const struct in_named_entry *old = p;
return htab_hash_string (old->name);
}
/* If SECTION has been seen before as a named section, return the flags
that were used. Otherwise, return 0. Note, that 0 is a perfectly valid
set of flags for a section to have, so 0 does not mean that the section
has not been seen. */
static unsigned int
get_named_section_flags (const char *section)
{
struct in_named_entry **slot;
slot = (struct in_named_entry **)
htab_find_slot_with_hash (in_named_htab, section,
htab_hash_string (section), NO_INSERT);
return slot ? (*slot)->flags : 0;
}
/* Returns true if the section has been declared before. Sets internal
flag on this section in in_named_hash so subsequent calls on this
section will return false. */
bool
named_section_first_declaration (const char *name)
{
struct in_named_entry **slot;
slot = (struct in_named_entry **)
htab_find_slot_with_hash (in_named_htab, name,
htab_hash_string (name), NO_INSERT);
if (! (*slot)->declared)
{
(*slot)->declared = true;
return true;
}
else
{
return false;
}
}
/* Record FLAGS for SECTION. If SECTION was previously recorded with a
different set of flags, return false. */
bool
set_named_section_flags (const char *section, unsigned int flags)
{
struct in_named_entry **slot, *entry;
slot = (struct in_named_entry **)
htab_find_slot_with_hash (in_named_htab, section,
htab_hash_string (section), INSERT);
entry = *slot;
if (!entry)
{
entry = ggc_alloc (sizeof (*entry));
*slot = entry;
entry->name = ggc_strdup (section);
entry->flags = flags;
entry->declared = false;
}
else if (entry->flags != flags)
return false;
return true;
}
/* Tell assembler to change to section NAME with attributes FLAGS. If
DECL is non-NULL, it is the VAR_DECL or FUNCTION_DECL with which
this section is associated. */
void
named_section_real (const char *name, unsigned int flags, tree decl)
{
if (in_section != in_named || strcmp (name, in_named_name) != 0)
{
if (! set_named_section_flags (name, flags))
abort ();
targetm.asm_out.named_section (name, flags, decl);
if (flags & SECTION_FORGET)
in_section = no_section;
else
{
in_named_name = ggc_strdup (name);
in_section = in_named;
}
}
}
/* Tell assembler to change to section NAME for DECL.
If DECL is NULL, just switch to section NAME.
If NAME is NULL, get the name from DECL.
If RELOC is 1, the initializer for DECL contains relocs. */
void
named_section (tree decl, const char *name, int reloc)
{
unsigned int flags;
if (decl != NULL_TREE && !DECL_P (decl))
abort ();
if (name == NULL)
name = TREE_STRING_POINTER (DECL_SECTION_NAME (decl));
if (strcmp (name, UNLIKELY_EXECUTED_TEXT_SECTION_NAME) == 0
&& !unlikely_text_section_name)
{
unlikely_text_section_name = xmalloc
(strlen (UNLIKELY_EXECUTED_TEXT_SECTION_NAME) + 1
* sizeof (char));
strcpy (unlikely_text_section_name,
UNLIKELY_EXECUTED_TEXT_SECTION_NAME);
}
flags = targetm.section_type_flags (decl, name, reloc);
/* Sanity check user variables for flag changes. Non-user
section flag changes will abort in named_section_flags.
However, don't complain if SECTION_OVERRIDE is set.
We trust that the setter knows that it is safe to ignore
the default flags for this decl. */
if (decl && ! set_named_section_flags (name, flags))
{
flags = get_named_section_flags (name);
if ((flags & SECTION_OVERRIDE) == 0)
error ("%J%D causes a section type conflict", decl, decl);
}
named_section_real (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
/* Tell the assembler to switch to the bss section. */
void
bss_section (void)
{
if (in_section != in_bss)
{
fprintf (asm_out_file, "%s\n", BSS_SECTION_ASM_OP);
in_section = in_bss;
}
}
#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);
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)
{
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 */
/* Switch to the section for function DECL.
If DECL is NULL_TREE, switch to the text section. We can be passed
NULL_TREE under some circumstances by dbxout.c at least. */
void
function_section (tree decl)
{
if (decl == NULL_TREE)
text_section ();
else
{
/* ??? Typical use of this function maybe shouldn't be looking
for unlikely blocks at all - in the event that an entire
function is going into the unlikely-execute section, that
should be reflected in its DECL_SECTION_NAME. */
rtx insns = cfun && cfun->emit ? get_insns () : 0;
bool unlikely = insns && scan_ahead_for_unlikely_executed_note (insns);
#ifdef USE_SELECT_SECTION_FOR_FUNCTIONS
/* APPLE LOCAL begin mainline 2006-02-13 radar 4373419 */
if (DECL_SECTION_NAME (decl))
{
if (unlikely)
unlikely_text_section ();
else
named_section (decl, 0, 0);
}
else
targetm.asm_out.select_section (decl, unlikely, DECL_ALIGN (decl));
/* APPLE LOCAL end mainline 2006-02-13 radar 4373419 */
#else
if (unlikely)
unlikely_text_section ();
else if (DECL_SECTION_NAME (decl))
named_section (decl, 0, 0);
else
text_section ();
#endif
}
}
/* Switch to read-only data section associated with function DECL. */
void
default_function_rodata_section (tree decl)
{
if (decl != NULL_TREE && DECL_SECTION_NAME (decl))
{
const char *name = TREE_STRING_POINTER (DECL_SECTION_NAME (decl));
/* For .gnu.linkonce.t.foo we want to use .gnu.linkonce.r.foo. */
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';
named_section_real (rname, SECTION_LINKONCE, decl);
return;
}
/* 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);
named_section_flags (rname, 0);
return;
}
}
readonly_data_section ();
}
/* Switch to read-only data section associated with function DECL
for targets where that section should be always the single
readonly data section. */
void
default_no_function_rodata_section (tree decl ATTRIBUTE_UNUSED)
{
readonly_data_section ();
}
/* Switch to section for variable DECL. RELOC is the same as the
argument to SELECT_SECTION. */
void
variable_section (tree decl, int reloc)
{
if (IN_NAMED_SECTION (decl))
named_section (decl, NULL, reloc);
else
targetm.asm_out.select_section (decl, reloc, DECL_ALIGN (decl));
}
/* Tell assembler to switch to the section for string merging. */
void
mergeable_string_section (tree decl ATTRIBUTE_UNUSED,
unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED,
unsigned int flags ATTRIBUTE_UNUSED)
{
if (HAVE_GAS_SHF_MERGE && flag_merge_constants
&& TREE_CODE (decl) == STRING_CST
&& TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE
&& align <= 256
&& TREE_STRING_LENGTH (decl) >= int_size_in_bytes (TREE_TYPE (decl)))
{
enum machine_mode mode;
unsigned int modesize;
const char *str;
int i, j, len, 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);
len = TREE_STRING_LENGTH (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;
if (!i && modesize < align)
{
/* A "" string with requested alignment greater than
character size might cause a problem:
if some other string required even bigger
alignment than "", then linker might think the
"" is just part of padding after some other string
and not put it into the hash table initially.
But this means "" could have smaller alignment
than requested. */
#ifdef ASM_OUTPUT_SECTION_START
named_section_flags (name, flags);
ASM_OUTPUT_SECTION_START (asm_out_file);
#else
readonly_data_section ();
#endif
return;
}
named_section_flags (name, flags);
return;
}
}
}
readonly_data_section ();
}
/* Tell assembler to switch to the section for constant merging. */
void
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;
named_section_flags (name, flags);
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);
/* APPLE LOCAL begin LLVM */
#ifndef ENABLE_LLVM
starred[0] = '*';
strcpy (starred + 1, name);
#else
/* If the name isn't an LLVM intrinsic, add a starting '\1' character to
* indicate that the target assembler shouldn't modify the name. If it *is*
* an LLVM intrinsic name, just set the name, to support code like this:
* unsigned bswap(unsigned) __asm__("llvm.bswap");
*/
if (name[0] != 'l' || name[1] != 'l' || name[2] != 'v' || name[3] != 'm'
|| name[4] != '.') {
starred[0] = 1;
strcpy (starred + 1, name);
} else {
strcpy (starred, name);
}
#endif
/* APPLE LOCAL end LLVM */
change_decl_assembler_name (decl, get_identifier (starred));
/* APPLE LOCAL begin LLVM */
#ifndef ENABLE_LLVM
SET_DECL_RTL (decl, NULL_RTX);
#else
SET_DECL_LLVM (decl, NULL_RTX);
#endif
/* APPLE LOCAL end LLVM */
}
/* 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 (! 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;
}
/* 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. */
/* A weak alias has TREE_PUBLIC set but not the other bits. */
if (TREE_CODE (decl) == PARM_DECL
|| TREE_CODE (decl) == RESULT_DECL
|| (TREE_CODE (decl) == VAR_DECL
&& !TREE_STATIC (decl)
&& !TREE_PUBLIC (decl)
&& !DECL_EXTERNAL (decl)
&& !DECL_REGISTER (decl)))
abort ();
/* And that we were not given a type or a label. */
else if (TREE_CODE (decl) == TYPE_DECL
|| TREE_CODE (decl) == LABEL_DECL)
abort ();
/* 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. */
if (GET_MODE (DECL_RTL (decl)) != DECL_MODE (decl))
SET_DECL_RTL (decl, adjust_address_nv (DECL_RTL (decl),
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);
/* 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 (TREE_CODE (decl) != FUNCTION_DECL && DECL_REGISTER (decl))
{
reg_number = decode_reg_name (name);
/* First detect errors in declaring global registers. */
if (reg_number == -1)
error ("%Jregister name not specified for %qD", decl, decl);
else if (reg_number < 0)
error ("%Jinvalid register name for %qD", decl, decl);
else if (TYPE_MODE (TREE_TYPE (decl)) == BLKmode)
error ("%Jdata type of %qD isn%'t suitable for a register",
decl, decl);
else if (! HARD_REGNO_MODE_OK (reg_number, TYPE_MODE (TREE_TYPE (decl))))
error ("%Jregister specified for %qD isn%'t suitable for data type",
decl, 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 ("volatile register variables don%'t "
"work as you might wish");
/* 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 ("%Jregister name given for non-register variable %qD", decl, 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;
x = gen_rtx_SYMBOL_REF (Pmode, name);
SYMBOL_REF_WEAK (x) = DECL_WEAK (decl);
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);
}
/* Make the rtl for variable VAR be volatile.
Use this only for static variables. */
void
make_var_volatile (tree var)
{
/* APPLE LOCAL begin LLVM */
#ifdef ENABLE_LLVM
return;
#endif
/* APPLE LOCAL end LLVM */
if (!MEM_P (DECL_RTL (var)))
abort ();
MEM_VOLATILE_P (DECL_RTL (var)) = 1;
}
/* Output a string of literal assembler code
for an `asm' keyword used between functions. */
void
assemble_asm (tree string)
{
/* APPLE LOCAL begin LLVM */
#ifdef ENABLE_LLVM
if (TREE_CODE(string) == ADDR_EXPR)
string = TREE_OPERAND(string, 0);
llvm_emit_file_scope_asm(TREE_STRING_POINTER(string));
return;
#endif
/* APPLE LOCAL end LLVM */
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;
}
named_section_flags (section, SECTION_WRITE);
assemble_align (POINTER_SIZE);
assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1);
}
#ifdef DTORS_SECTION_ASM_OP
void
dtors_section (void)
{
if (in_section != in_dtors)
{
in_section = in_dtors;
fputs (DTORS_SECTION_ASM_OP, asm_out_file);
fputc ('\n', asm_out_file);
}
}
void
default_dtor_section_asm_out_destructor (rtx symbol,
int priority ATTRIBUTE_UNUSED)
{
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;
}
named_section_flags (section, SECTION_WRITE);
assemble_align (POINTER_SIZE);
assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1);
}
#ifdef CTORS_SECTION_ASM_OP
void
ctors_section (void)
{
if (in_section != in_ctors)
{
in_section = in_ctors;
fputs (CTORS_SECTION_ASM_OP, asm_out_file);
fputc ('\n', asm_out_file);
}
}
void
default_ctor_section_asm_out_constructor (rtx symbol,
int priority ATTRIBUTE_UNUSED)
{
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))))
/* APPLE LOCAL begin LLVM */
#ifndef ENABLE_LLVM
|| !MEM_P (DECL_RTL (decl))
#else
|| (DECL_LLVM (decl), 0)
#endif
)
/* APPLE LOCAL end LLVM */
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;
char *name;
/* APPLE LOCAL begin LLVM */
#ifndef ENABLE_LLVM
rtx decl_rtl = DECL_RTL (decl);
name = (char*)XSTR (XEXP (decl_rtl, 0), 0);
#else
void *decl_llvm = DECL_LLVM (decl);
name = (char*)llvm_get_decl_name(decl_llvm);
#endif
p = targetm.strip_name_encoding (name);
/* APPLE LOCAL end LLVM */
name = xstrdup (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;
if (unlikely_text_section_name)
free (unlikely_text_section_name);
unlikely_section_label_printed = false;
unlikely_text_section_name = NULL;
unlikely_section_label = reconcat (unlikely_section_label,
fnname, ".unlikely_section", NULL);
/* The following code does not need preprocessing in the assembler. */
app_disable ();
if (CONSTANT_POOL_BEFORE_FUNCTION)
output_constant_pool (fnname, decl);
/* Make sure the cold text (code) section is 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. We don't need to set the hot
section alignment here, because code further down in this function
sets the alignment for whichever section comes first, and if there
is a hot section it is guaranteed to be first. */
if (flag_reorder_blocks_and_partition)
{
/* APPLE LOCAL begin hot/cold partitioning */
/* We don't want to print out the label for the cold section here,
just fix the alignment. Therefore play games with
unlikely_section_label_printed to get this behavior. */
unlikely_section_label_printed = true;
/* APPLE LOCAL end hot/cold partitioning */
unlikely_text_section ();
assemble_align (FUNCTION_BOUNDARY);
/* APPLE LOCAL begin hot/cold partitioning */
unlikely_section_label_printed = false;
/* APPLE LOCAL end hot/cold partitioning */
}
resolve_unique_section (decl, 0, flag_function_sections);
function_section (decl);
/* Tell assembler to move to target machine's alignment for functions. */
align = floor_log2 (FUNCTION_BOUNDARY / BITS_PER_UNIT);
if (align < force_align_functions_log)
align = force_align_functions_log;
if (align > 0)
{
ASM_OUTPUT_ALIGN (asm_out_file, align);
}
/* Handle a user-specified function alignment.
Note that we still need to align to FUNCTION_BOUNDARY, as above,
because ASM_OUTPUT_MAX_SKIP_ALIGN might not do any alignment at all. */
if (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
}
#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 */
if (in_unlikely_text_section ()
&& !unlikely_section_label_printed)
{
ASM_OUTPUT_LABEL (asm_out_file, unlikely_section_label);
unlikely_section_label_printed = true;
}
}
/* 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)
{
#ifdef ASM_DECLARE_FUNCTION_SIZE
ASM_DECLARE_FUNCTION_SIZE (asm_out_file, fnname, decl);
#endif
if (! CONSTANT_POOL_BEFORE_FUNCTION)
{
output_constant_pool (fnname, decl);
function_section (decl); /* need to switch back */
}
}
/* 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_text_section ())
|| (ASM_NO_SKIP_IN_TEXT && in_unlikely_text_section ()))
{
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;
}
}
#if defined ASM_OUTPUT_ALIGNED_DECL_LOCAL
#define ASM_EMIT_LOCAL(decl, name, size, rounded) \
ASM_OUTPUT_ALIGNED_DECL_LOCAL (asm_out_file, decl, name, size, DECL_ALIGN (decl))
#else
#if defined ASM_OUTPUT_ALIGNED_LOCAL
#define ASM_EMIT_LOCAL(decl, name, size, rounded) \
ASM_OUTPUT_ALIGNED_LOCAL (asm_out_file, name, size, DECL_ALIGN (decl))
#else
#define ASM_EMIT_LOCAL(decl, name, size, rounded) \
ASM_OUTPUT_LOCAL (asm_out_file, name, size, rounded)
#endif
#endif
#if defined ASM_OUTPUT_ALIGNED_BSS
#define ASM_EMIT_BSS(decl, name, size, rounded) \
ASM_OUTPUT_ALIGNED_BSS (asm_out_file, decl, name, size, DECL_ALIGN (decl))
#else
#if defined ASM_OUTPUT_BSS
#define ASM_EMIT_BSS(decl, name, size, rounded) \
ASM_OUTPUT_BSS (asm_out_file, decl, name, size, rounded)
#else
#undef ASM_EMIT_BSS
#endif
#endif
#if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
#define ASM_EMIT_COMMON(decl, name, size, rounded) \
ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file, decl, name, size, DECL_ALIGN (decl))
#else
#if defined ASM_OUTPUT_ALIGNED_COMMON
#define ASM_EMIT_COMMON(decl, name, size, rounded) \
ASM_OUTPUT_ALIGNED_COMMON (asm_out_file, name, size, DECL_ALIGN (decl))
#else
#define ASM_EMIT_COMMON(decl, name, size, rounded) \
ASM_OUTPUT_COMMON (asm_out_file, name, size, rounded)
#endif
#endif
static bool
asm_emit_uninitialised (tree decl, const char *name,
unsigned HOST_WIDE_INT size ATTRIBUTE_UNUSED,
unsigned HOST_WIDE_INT rounded ATTRIBUTE_UNUSED)
{
enum
{
asm_dest_common,
asm_dest_bss,
asm_dest_local
}
destination = asm_dest_local;
/* ??? We should handle .bss via select_section mechanisms rather than
via special target hooks. That would eliminate this special case. */
if (TREE_PUBLIC (decl))
{
if (!DECL_COMMON (decl))
#ifdef ASM_EMIT_BSS
destination = asm_dest_bss;
#else
return false;
#endif
else
destination = asm_dest_common;
}
if (destination != asm_dest_common)
{
resolve_unique_section (decl, 0, flag_data_sections);
/* Custom sections don't belong here. */
if (DECL_SECTION_NAME (decl))
return false;
}
if (destination == asm_dest_bss)
globalize_decl (decl);
if (flag_shared_data)
{
switch (destination)
{
#ifdef ASM_OUTPUT_SHARED_BSS
case asm_dest_bss:
ASM_OUTPUT_SHARED_BSS (asm_out_file, decl, name, size, rounded);
return;
#endif
#ifdef ASM_OUTPUT_SHARED_COMMON
case asm_dest_common:
ASM_OUTPUT_SHARED_COMMON (asm_out_file, name, size, rounded);
return;
#endif
#ifdef ASM_OUTPUT_SHARED_LOCAL
case asm_dest_local:
ASM_OUTPUT_SHARED_LOCAL (asm_out_file, name, size, rounded);
return;
#endif
default:
break;
}
}
switch (destination)
{
#ifdef ASM_EMIT_BSS
case asm_dest_bss:
ASM_EMIT_BSS (decl, name, size, rounded);
break;
#endif
case asm_dest_common:
ASM_EMIT_COMMON (decl, name, size, rounded);
break;
case asm_dest_local:
ASM_EMIT_LOCAL (decl, name, size, rounded);
break;
default:
abort ();
}
return true;
}
/* 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;
unsigned int align;
int reloc = 0;
rtx decl_rtl;
/* APPLE LOCAL begin LLVM */
#ifdef ENABLE_LLVM
void *decl_llvm;
#endif
/* APPLE LOCAL end LLVM */
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;
/* APPLE LOCAL begin LLVM */
#ifndef ENABLE_LLVM /* register globals are not supported */
/* Do nothing for global register variables. */
if (DECL_RTL_SET_P (decl) && REG_P (DECL_RTL (decl)))
{
TREE_ASM_WRITTEN (decl) = 1;
return;
}
#endif
/* APPLE LOCAL begin LLVM */
/* 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 ("%Jstorage size of %qD isn%'t known", decl, 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. */
/* APPLE LOCAL begin LLVM */
#ifndef ENABLE_LLVM /* register globals are not supported */
decl_rtl = DECL_RTL (decl);
#else
decl_llvm = DECL_LLVM (decl);
#endif
/* APPLE LOCAL end LLVM */
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 ("%Jsize of variable %qD is too large", decl, decl);
return;
}
/* APPLE LOCAL begin LLVM */
#ifndef ENABLE_LLVM /* register globals are not supported */
name = XSTR (XEXP (decl_rtl, 0), 0);
#else
name = llvm_get_decl_name (decl_llvm);
#endif
if (TREE_PUBLIC (decl) && DECL_NAME (decl))
notice_global_symbol (decl);
/* Compute the alignment of this data. */
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 ("%Jalignment of %qD is greater than maximum object "
"file alignment. Using %d", decl, 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;
/* APPLE LOCAL begin LLVM */
#ifdef ENABLE_LLVM
if (dont_output_data) {
fprintf(stderr, "LLVM must emit the data!");
abort();
}
emit_global_to_llvm(decl);
return;
#endif
/* APPLE LOCAL end LLVM */
set_mem_align (decl_rtl, align);
if (TREE_PUBLIC (decl))
maybe_assemble_visibility (decl);
if (DECL_PRESERVE_P (decl))
targetm.asm_out.mark_decl_preserved (name);
/* Handle uninitialized definitions. */
/* If the decl has been given an explicit section name, then it
isn't common, and shouldn't be handled as such. */
if (DECL_SECTION_NAME (decl) || dont_output_data)
;
/* We don't implement common thread-local data at present. */
else if (DECL_THREAD_LOCAL (decl))
{
if (DECL_COMMON (decl))
sorry ("thread-local COMMON data not implemented");
}
else if (DECL_INITIAL (decl) == 0
|| 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))))
{
unsigned HOST_WIDE_INT size = tree_low_cst (DECL_SIZE_UNIT (decl), 1);
unsigned HOST_WIDE_INT 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 !defined(ASM_OUTPUT_ALIGNED_COMMON) && !defined(ASM_OUTPUT_ALIGNED_DECL_COMMON) && !defined(ASM_OUTPUT_ALIGNED_BSS)
if ((unsigned HOST_WIDE_INT) DECL_ALIGN_UNIT (decl) > rounded)
warning ("%Jrequested alignment for %qD is greater than "
"implemented alignment of %d", decl, decl, rounded);
#endif
/* If the target cannot output uninitialized but not common global data
in .bss, then we have to use .data, so fall through. */
if (asm_emit_uninitialised (decl, name, size, rounded))
return;
}
/* Handle initialized definitions.
Also handle uninitialized global definitions if -fno-common and the
target doesn't support ASM_OUTPUT_BSS. */
/* First make the assembler name(s) global if appropriate. */
if (TREE_PUBLIC (decl) && DECL_NAME (decl))
globalize_decl (decl);
/* Output any data that we will need to use the address of. */
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));
output_addressed_constants (DECL_INITIAL (decl));
}
/* Switch to the appropriate section. */
resolve_unique_section (decl, reloc, flag_data_sections);
variable_section (decl, reloc);
/* APPLE LOCAL begin zerofill 20020218 --turly */
#ifdef ASM_OUTPUT_ZEROFILL
/* We need a ZEROFILL COALESCED option! */
if (!DECL_COMMON (decl)
&& ! 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,
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 (in_text_section () || in_unlikely_text_section ())
DECL_IN_TEXT_SECTION (decl) = 1;
/* Output the alignment of this data. */
if (align > BITS_PER_UNIT)
ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (DECL_ALIGN_UNIT (decl)));
/* 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),
align);
else
/* Leave space for it. */
assemble_zeros (tree_low_cst (DECL_SIZE_UNIT (decl), 1));
}
}
/* 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);
/* APPLE LOCAL llvm */
#if defined(ASM_OUTPUT_EXTERNAL) && !defined(ENABLE_LLVM)
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)
cgraph_varpool_mark_needed_node (cgraph_varpool_node (decl));
/* else do nothing - we can get various sorts of CST nodes here,
which do not need to be marked. */
}
/* 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)
mark_referenced (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;
#if 0
if (flag_shared_data)
data_section ();
#endif
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
TRAMPOLINE_SECTION ();
#else
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. If FORCE is nonzero, abort if we can't output
the constant. */
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. */
if (i > 0)
abort ();
}
if (force)
abort ();
return false;
}
void
assemble_real (REAL_VALUE_TYPE d, enum machine_mode mode, unsigned int align)
{
long data[4];
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.
Abort if EXP does not reduce. */
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;
rtx x;
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 (VOIDmode, 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:
abort ();
}
if (!MEM_P (x))
abort ();
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:
{
tree link;
hi = 5 + int_size_in_bytes (TREE_TYPE (exp));
for (link = CONSTRUCTOR_ELTS (exp); link; link = TREE_CHAIN (link))
if (TREE_VALUE (link))
hi = hi * 603 + const_hash_1 (TREE_VALUE (link));
return hi;
}
case ADDR_EXPR:
case FDESC_EXPR:
{
struct addr_const value;
decode_addr_const (exp, &value);
if (GET_CODE (value.base) == 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]));
}
else if (GET_CODE (value.base) == LABEL_REF)
hi = value.offset + CODE_LABEL_NUMBER (XEXP (value.base, 0)) * 13;
else
abort ();
}
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;
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:
{
tree l1, l2;
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;
}
for (l1 = CONSTRUCTOR_ELTS (t1), l2 = CONSTRUCTOR_ELTS (t2);
l1 && l2;
l1 = TREE_CHAIN (l1), l2 = TREE_CHAIN (l2))
{
/* Check that each value is the same... */
if (! compare_constant (TREE_VALUE (l1), TREE_VALUE (l2)))
return 0;
/* ... and that they apply to the same fields! */
if (typecode == ARRAY_TYPE)
{
if (! compare_constant (TREE_PURPOSE (l1),
TREE_PURPOSE (l2)))
return 0;
}
else
{
if (TREE_PURPOSE (l1) != TREE_PURPOSE (l2))
return 0;
}
}
return l1 == NULL_TREE && l2 == NULL_TREE;
}
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;
}
}
/* Should not get here. */
abort ();
}
/* 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);
tree list = copy_list (CONSTRUCTOR_ELTS (exp));
tree tail;
CONSTRUCTOR_ELTS (copy) = list;
for (tail = list; tail; tail = TREE_CHAIN (tail))
TREE_VALUE (tail) = copy_constant (TREE_VALUE (tail));
return copy;
}
default:
{
tree t;
t = lang_hooks.expand_constant (exp);
if (t != exp)
return copy_constant (t);
else
abort ();
}
}
}
/* 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++;
ASM_GENERATE_INTERNAL_LABEL (label, "LC", labelno);
/* We have a symbol name; construct the SYMBOL_REF and the MEM. */
symbol = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (label));
SYMBOL_REF_FLAGS (symbol) = SYMBOL_FLAG_LOCAL;
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;
/* 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);
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);
}
/* 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);
const char *label = XSTR (symbol, 0);
HOST_WIDE_INT size;
/* Make sure any other constants whose addresses appear in EXP
are assigned label numbers. */
int reloc = compute_reloc_for_constant (exp);
/* Align the location counter as required by EXP's data type. */
unsigned int align = TYPE_ALIGN (TREE_TYPE (exp));
#ifdef CONSTANT_ALIGNMENT
align = CONSTANT_ALIGNMENT (exp, align);
#endif
output_addressed_constants (exp);
/* We are no longer deferring this constant. */
TREE_ASM_WRITTEN (exp) = 1;
if (IN_NAMED_SECTION (exp))
named_section (exp, NULL, reloc);
else
targetm.asm_out.select_section (exp, reloc, align);
if (align > BITS_PER_UNIT)
{
ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (align / BITS_PER_UNIT));
}
size = int_size_in_bytes (TREE_TYPE (exp));
if (TREE_CODE (exp) == STRING_CST)
size = MAX (TREE_STRING_LENGTH (exp), size);
/* 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);
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;
htab_t GTY((param_is (struct constant_descriptor_rtx))) const_rtx_sym_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);
}
/* Hash and compare functions for const_rtx_sym_htab. */
static hashval_t
const_desc_rtx_sym_hash (const void *ptr)
{
const struct constant_descriptor_rtx *desc = ptr;
return htab_hash_string (XSTR (desc->sym, 0));
}
static int
const_desc_rtx_sym_eq (const void *a, const void *b)
{
const struct constant_descriptor_rtx *x = a;
const struct constant_descriptor_rtx *y = b;
return XSTR (x->sym, 0) == XSTR (y->sym, 0);
}
/* 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;
}
/* Initialize constant pool hashing for a new function. */
void
init_varasm_status (struct function *f)
{
struct varasm_status *p;
struct rtx_constant_pool *pool;
p = ggc_alloc (sizeof (struct varasm_status));
f->varasm = p;
pool = ggc_alloc (sizeof (struct rtx_constant_pool));
p->pool = pool;
p->deferred_constants = 0;
pool->const_rtx_htab = htab_create_ggc (31, const_desc_rtx_hash,
const_desc_rtx_eq, NULL);
pool->const_rtx_sym_htab = htab_create_ggc (31, const_desc_rtx_sym_hash,
const_desc_rtx_sym_eq, NULL);
pool->first = pool->last = NULL;
pool->offset = 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 = cfun->varasm->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;
/* 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. */
desc->sym = symbol = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (label));
SYMBOL_REF_FLAGS (symbol) = SYMBOL_FLAG_LOCAL;
CONSTANT_POOL_ADDRESS_P (symbol) = 1;
current_function_uses_const_pool = 1;
/* Insert the descriptor into the symbol cross-reference table too. */
slot = htab_find_slot (pool->const_rtx_sym_htab, desc, INSERT);
if (*slot)
abort ();
*slot = 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 SYMBOL_REF with CONSTANT_POOL_ADDRESS_P true, return a pointer to
the corresponding constant_descriptor_rtx structure. */
static struct constant_descriptor_rtx *
find_pool_constant (struct rtx_constant_pool *pool, rtx sym)
{
struct constant_descriptor_rtx tmp;
tmp.sym = sym;
return htab_find (pool->const_rtx_sym_htab, &tmp);
}
/* Given a constant pool SYMBOL_REF, return the corresponding constant. */
rtx
get_pool_constant (rtx addr)
{
return find_pool_constant (cfun->varasm->pool, 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 = find_pool_constant (cfun->varasm->pool, addr);
*pmarked = (desc->mark != 0);
return desc->constant;
}
/* Likewise, but for the constant pool of a specific function. */
rtx
get_pool_constant_for_function (struct function *f, rtx addr)
{
return find_pool_constant (f->varasm->pool, addr)->constant;
}
/* Similar, return the mode. */
enum machine_mode
get_pool_mode (rtx addr)
{
return find_pool_constant (cfun->varasm->pool, 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:
if (GET_CODE (x) != CONST_DOUBLE)
abort ();
else
{
REAL_VALUE_TYPE r