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. */
+Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA. */
/* This file handles generation of all the assembler code
#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;
bool first_function_block_is_cold;
-/* 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. Used for
- debug info. */
-
-char *unlikely_section_label;
-
-/* The following global variable indicates the label name to be put at
- the start of the first hot section within each function, when
- partitioning basic blocks into hot and cold sections. Used for
- debug info. */
-
-char *hot_section_label;
-
-/* The following global variable indicates the label name to be put at
- the end of the last hot section within each function, when
- partitioning basic blocks into hot and cold sections. Used for
- debug info. */
-
-char *hot_section_end_label;
-
-/* The following global variable indicates the label name to be put at
- the end of the last cold section within each function, when
- partitioning basic blocks into hot and cold sections. Used for
- debug info.*/
-
-char *cold_section_end_label;
-
-/* The following global variable indicates the seciton name to be used
- for the current cold section, when partitiong hot and cold basic
- blocks into separate sections. */
-
-char *unlikely_text_section_name;
-
/* We give all constants their own alias set. Perhaps redundant with
MEM_READONLY_P, but pre-dates it. */
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 *);
-static void initialize_cold_section_name (void);
#ifdef BSS_SECTION_ASM_OP
#ifdef ASM_OUTPUT_BSS
static void asm_output_bss (FILE *, tree, const char *,
unsigned HOST_WIDE_INT);
static void mark_weak (tree);
\f
-static GTY(()) enum in_section in_section = no_section;
-enum in_section last_text_section;
+/* 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;
+
+/* 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
&& DECL_SECTION_NAME (DECL) != NULL_TREE)
#endif
-/* Text of section name when in_section == in_named. */
-static GTY(()) const char *in_named_name;
-const char *last_text_section_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
-
-static void
-initialize_cold_section_name (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);
- sprintf (unlikely_text_section_name, "%s%s", name, "_unlikely");
- }
- else
- unlikely_text_section_name =
- xstrdup (UNLIKELY_EXECUTED_TEXT_SECTION_NAME);
- }
-}
-
-/* Tell assembler to switch to text section. */
-
-void
-text_section (void)
-{
- if (in_section != in_text)
- {
- in_section = in_text;
- last_text_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)
-{
- if (! unlikely_text_section_name)
- initialize_cold_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;
- last_text_section = in_unlikely_executed_text;
- }
-}
-
-/* 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. */
+/* Hash table of named sections. */
+static GTY((param_is (section))) htab_t section_htab;
-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. */
+/* Helper routines for maintaining section_htab. */
static int
-in_named_entry_eq (const void *p1, const void *p2)
+section_entry_eq (const void *p1, const void *p2)
{
- const struct in_named_entry *old = p1;
+ const section *old = p1;
const char *new = p2;
- return strcmp (old->name, new) == 0;
+ return strcmp (old->named.name, new) == 0;
}
static hashval_t
-in_named_entry_hash (const void *p)
+section_entry_hash (const void *p)
{
- const struct in_named_entry *old = p;
- return htab_hash_string (old->name);
+ const section *old = p;
+ return htab_hash_string (old->named.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. */
+/* Return a new unnamed section with the given fields. */
-static unsigned int
-get_named_section_flags (const char *section)
+section *
+get_unnamed_section (unsigned int flags, void (*callback) (const void *),
+ const void *data)
{
- struct in_named_entry **slot;
+ section *sect;
- slot = (struct in_named_entry **)
- htab_find_slot_with_hash (in_named_htab, section,
- htab_hash_string (section), NO_INSERT);
+ sect = ggc_alloc (sizeof (struct unnamed_section));
+ sect->unnamed.common.flags = flags;
+ sect->unnamed.callback = callback;
+ sect->unnamed.data = data;
+ sect->unnamed.next = unnamed_sections;
- return slot ? (*slot)->flags : 0;
+ unnamed_sections = sect;
+ return sect;
}
-/* 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. */
+/* Return the named section structure associated with NAME. Create
+ a new section with the given fields if no such structure exists. */
-bool
-named_section_first_declaration (const char *name)
+section *
+get_section (const char *name, unsigned int flags, tree decl)
{
- struct in_named_entry **slot;
+ section *sect, **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 = (section **)
+ htab_find_slot_with_hash (section_htab, name,
+ htab_hash_string (name), INSERT);
+ flags |= SECTION_NAMED;
+ if (*slot == NULL)
{
- (*slot)->declared = true;
- return true;
+ 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
{
- return false;
+ 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;
+ if (decl)
+ error ("%+D causes a section type conflict", decl);
+ else
+ gcc_unreachable ();
+ }
}
+ return sect;
}
-
-/* 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)
+static void
+initialize_cold_section_name (void)
{
- struct in_named_entry **slot, *entry;
+ const char *stripped_name;
+ char *name, *buffer;
+ tree dsn;
- slot = (struct in_named_entry **)
- htab_find_slot_with_hash (in_named_htab, section,
- htab_hash_string (section), INSERT);
- entry = *slot;
+ gcc_assert (cfun && current_function_decl);
+ if (cfun->unlikely_text_section_name)
+ return;
- if (!entry)
+ dsn = DECL_SECTION_NAME (current_function_decl);
+ if (flag_function_sections && dsn)
{
- 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;
+ name = alloca (TREE_STRING_LENGTH (dsn) + 1);
+ memcpy (name, TREE_STRING_POINTER (dsn), TREE_STRING_LENGTH (dsn) + 1);
- return true;
+ 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 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. */
+/* Tell assembler to switch to unlikely-to-be-executed text section. */
-void
-named_section_real (const char *name, unsigned int flags, tree decl)
+section *
+unlikely_text_section (void)
{
- if (in_section != in_named || strcmp (name, in_named_name) != 0)
+ if (cfun)
{
- bool unchanged = set_named_section_flags (name, flags);
+ if (!cfun->unlikely_text_section_name)
+ initialize_cold_section_name ();
- gcc_assert (unchanged);
+ return get_named_section (NULL, cfun->unlikely_text_section_name, 0);
+ }
+ else
+ return get_named_section (NULL, UNLIKELY_EXECUTED_TEXT_SECTION_NAME, 0);
+}
- targetm.asm_out.named_section (name, flags, decl);
+/* 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. */
- if (flags & SECTION_FORGET)
- in_section = no_section;
- else
- {
- in_named_name = ggc_strdup (name);
- in_section = in_named;
- }
- }
+bool
+unlikely_text_section_p (section *sect)
+{
+ const char *name;
- if (in_text_section () || in_unlikely_text_section ())
- {
- last_text_section = in_section;
- last_text_section_name = name;
- }
+ if (cfun)
+ name = cfun->unlikely_text_section_name;
+ else
+ name = UNLIKELY_EXECUTED_TEXT_SECTION_NAME;
+
+ return (name
+ && sect
+ && (sect->common.flags & SECTION_NAMED) != 0
+ && strcmp (name, sect->named.name) == 0);
}
-/* 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. */
+/* 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. */
-void
-named_section (tree decl, const char *name, int reloc)
+section *
+get_named_section (tree decl, const char *name, int reloc)
{
unsigned int flags;
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 =
- xstrdup (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);
+ return get_section (name, flags, decl);
}
/* If required, set DECL_SECTION_NAME to a unique name. */
#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
unsigned HOST_WIDE_INT rounded)
{
targetm.asm_out.globalize_label (file, name);
- bss_section ();
+ switch_to_section (bss_section);
#ifdef ASM_DECLARE_OBJECT_NAME
last_assemble_variable_decl = decl;
ASM_DECLARE_OBJECT_NAME (file, name, decl);
const char *name, unsigned HOST_WIDE_INT size,
int align)
{
- bss_section ();
+ 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;
#endif /* BSS_SECTION_ASM_OP */
-/* Switch to the section for function DECL.
+#ifndef USE_SELECT_SECTION_FOR_FUNCTIONS
+/* Return the hot section for function DECL. Return text_section for
+ null DECLs. */
- If DECL is NULL_TREE, switch to the text section. We can be passed
+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. */
-void
+section *
function_section (tree decl)
{
- bool unlikely = false;
+ int reloc = 0;
if (first_function_block_is_cold)
- unlikely = true;
+ reloc = 1;
#ifdef USE_SELECT_SECTION_FOR_FUNCTIONS
- targetm.asm_out.select_section (decl, unlikely, DECL_ALIGN (decl));
+ return targetm.asm_out.select_section (decl, reloc, DECL_ALIGN (decl));
#else
- if (decl != NULL_TREE
- && DECL_SECTION_NAME (decl) != NULL_TREE)
- named_section (decl, (char *) 0, 0);
- else
- text_section ();
+ return hot_function_section (decl);
#endif
}
-void
-current_function_section (tree decl)
+section *
+current_function_section (void)
{
#ifdef USE_SELECT_SECTION_FOR_FUNCTIONS
- bool unlikely = (in_unlikely_text_section ()
- || (last_text_section == in_unlikely_executed_text));
-
- targetm.asm_out.select_section (decl, unlikely, DECL_ALIGN (decl));
+ return targetm.asm_out.select_section (current_function_decl,
+ in_cold_section_p,
+ DECL_ALIGN (current_function_decl));
#else
- if (last_text_section == in_unlikely_executed_text)
- unlikely_text_section ();
- else if (last_text_section == in_text)
- text_section ();
- else if (last_text_section == in_named)
- named_section (NULL_TREE, last_text_section_name, 0);
- else
- function_section (decl);
+ return (in_cold_section_p
+ ? unlikely_text_section ()
+ : hot_function_section (current_function_decl));
#endif
}
-/* Switch to read-only data section associated with function DECL. */
+/* Return the read-only data section associated with function DECL. */
-void
+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. */
- if (DECL_ONE_ONLY (decl) && strncmp (name, ".gnu.linkonce.t.", 16) == 0)
+ 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';
- named_section_real (rname, SECTION_LINKONCE, decl);
- return;
+ return get_section (rname, SECTION_LINKONCE, decl);
}
/* For .text.foo we want to use .rodata.foo. */
else if (flag_function_sections && flag_data_sections
memcpy (rname, ".rodata", 7);
memcpy (rname + 7, name + 5, len - 5);
- named_section_flags (rname, 0);
- return;
+ return get_section (rname, 0, decl);
}
}
- readonly_data_section ();
+ return readonly_data_section;
}
-/* Switch to read-only data section associated with function DECL
+/* Return the read-only data section associated with function DECL
for targets where that section should be always the single
readonly data section. */
-void
+section *
default_no_function_rodata_section (tree decl ATTRIBUTE_UNUSED)
{
- readonly_data_section ();
+ return readonly_data_section;
}
/* Switch to section for variable DECL. RELOC is the same as the
variable_section (tree decl, int reloc)
{
if (IN_NAMED_SECTION (decl))
- named_section (decl, NULL, reloc);
+ switch_to_section (get_named_section (decl, NULL, reloc));
else
- targetm.asm_out.select_section (decl, reloc, DECL_ALIGN (decl));
+ switch_to_section (targetm.asm_out.select_section (decl, reloc,
+ DECL_ALIGN (decl)));
}
-/* Tell assembler to switch to the section for string merging. */
+/* Return the section to use for string merging. */
-void
+static section *
mergeable_string_section (tree decl ATTRIBUTE_UNUSED,
unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED,
unsigned int flags ATTRIBUTE_UNUSED)
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;
+ return get_section (name, flags, NULL);
}
}
}
- readonly_data_section ();
+ return readonly_data_section;
}
-/* Tell assembler to switch to the section for constant merging. */
+/* Return the section to use for constant merging. */
-void
+section *
mergeable_constant_section (enum machine_mode mode ATTRIBUTE_UNUSED,
unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED,
unsigned int flags ATTRIBUTE_UNUSED)
sprintf (name, ".rodata.cst%d", (int) (align / 8));
flags |= (align / 8) | SECTION_MERGE;
- named_section_flags (name, flags);
- return;
+ return get_section (name, flags, NULL);
}
-
- readonly_data_section ();
+ return readonly_data_section;
}
\f
/* Given NAME, a putative register name, discard any customary prefixes. */
= ADDITIONAL_REGISTER_NAMES;
for (i = 0; i < (int) ARRAY_SIZE (table); i++)
- if (! strcmp (asmspec, table[i].name))
+ if (table[i].name[0]
+ && ! strcmp (asmspec, table[i].name))
return table[i].number;
}
#endif /* ADDITIONAL_REGISTER_NAMES */
}
name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
-
- if (TREE_CODE (decl) != FUNCTION_DECL && DECL_REGISTER (decl))
+
+ if (name[0] != '*' && TREE_CODE (decl) != FUNCTION_DECL
+ && DECL_REGISTER (decl))
{
- reg_number = decode_reg_name (name);
+ 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 ("%Jregister name not specified for %qD", decl, decl);
+ error ("register name not specified for %q+D", decl);
else if (reg_number < 0)
- error ("%Jinvalid register name for %qD", decl, decl);
+ error ("invalid register name for %q+D", decl);
else if (TYPE_MODE (TREE_TYPE (decl)) == BLKmode)
- error ("%Jdata type of %qD isn%'t suitable for a register",
- decl, decl);
+ 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 ("%Jregister specified for %qD isn%'t suitable for data type",
- decl, decl);
+ error ("register specified for %q+D isn%'t suitable for data type",
+ decl);
/* Now handle properly declared static register variables. */
else
{
error ("global register variable has initial value");
}
if (TREE_THIS_VOLATILE (decl))
- warning ("volatile register variables don%'t "
- "work as you might wish");
+ 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
{
reg_number = decode_reg_name (name);
if (reg_number >= 0 || reg_number == -3)
- error ("%Jregister name given for non-register variable %qD", decl, decl);
+ error ("register name given for non-register variable %q+D", decl);
}
#endif
}
section = buf;
}
- named_section_flags (section, SECTION_WRITE);
+ 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
-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 ();
+ switch_to_section (dtors_section);
assemble_align (POINTER_SIZE);
assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1);
}
section = buf;
}
- named_section_flags (section, SECTION_WRITE);
+ 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
-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 ();
+ switch_to_section (ctors_section);
assemble_align (POINTER_SIZE);
assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1);
}
if (!*type)
{
const char *p;
- char *name;
+ const char *name;
rtx decl_rtl = DECL_RTL (decl);
p = targetm.strip_name_encoding (XSTR (XEXP (decl_rtl, 0), 0));
- name = xstrdup (p);
+ name = ggc_strdup (p);
*type = name;
}
assemble_start_function (tree decl, const char *fnname)
{
int align;
+ char tmp_label[100];
bool hot_label_written = false;
- unlikely_text_section_name = NULL;
-
+ cfun->unlikely_text_section_name = NULL;
+
first_function_block_is_cold = false;
- hot_section_label = reconcat (hot_section_label, fnname, ".hot_section", NULL);
- unlikely_section_label = reconcat (unlikely_section_label,
- fnname, ".unlikely_section", NULL);
- hot_section_end_label = reconcat (hot_section_end_label,
- fnname, ".end", NULL);
- cold_section_end_label = reconcat (cold_section_end_label,
- fnname, ".end.cold", NULL);
+ 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. */
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
if (flag_reorder_blocks_and_partition)
{
- unlikely_text_section ();
+ switch_to_section (unlikely_text_section ());
assemble_align (FUNCTION_BOUNDARY);
- ASM_OUTPUT_LABEL (asm_out_file, unlikely_section_label);
- if (BB_PARTITION (ENTRY_BLOCK_PTR->next_bb) == BB_COLD_PARTITION)
+ 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)
{
- /* Since the function starts with a cold section, we need to
- explicitly align the hot section and write out the hot
- section label. */
- text_section ();
+ switch_to_section (text_section);
assemble_align (FUNCTION_BOUNDARY);
- ASM_OUTPUT_LABEL (asm_out_file, hot_section_label);
+ ASM_OUTPUT_LABEL (asm_out_file, cfun->hot_section_label);
hot_label_written = true;
first_function_block_is_cold = true;
}
doing partitioning, if the entire function was decided by
choose_function_section (predict.c) to be cold. */
- int i;
- int len;
- char *s;
-
initialize_cold_section_name ();
- /* The following is necessary, because 'strcmp
- (TREE_STRING_POINTER (DECL_SECTION_NAME (decl)), blah)' always
- fails, presumably because TREE_STRING_POINTER is declared to
- be an array of size 1 of char. */
-
- len = TREE_STRING_LENGTH (DECL_SECTION_NAME (decl));
- s = (char *) xmalloc (len + 1);
-
- for (i = 0; i < len; i ++)
- s[i] = (TREE_STRING_POINTER (DECL_SECTION_NAME (decl)))[i];
- s[len] = '\0';
-
- if (unlikely_text_section_name
- && (strcmp (s, unlikely_text_section_name) == 0))
+ 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;
}
- last_text_section = no_section;
- in_section = no_section;
- resolve_unique_section (decl, 0, flag_function_sections);
+ in_cold_section_p = first_function_block_is_cold;
/* Switch to the correct text section for the start of the function. */
- function_section (decl);
+ switch_to_section (function_section (decl));
if (flag_reorder_blocks_and_partition
&& !hot_label_written)
- ASM_OUTPUT_LABEL (asm_out_file, hot_section_label);
+ ASM_OUTPUT_LABEL (asm_out_file, cfun->hot_section_label);
/* Tell assembler to move to target machine's alignment for functions. */
align = floor_log2 (FUNCTION_BOUNDARY / BITS_PER_UNIT);
/* Standard thing is just output label for the function. */
ASM_OUTPUT_LABEL (asm_out_file, fnname);
#endif /* ASM_DECLARE_FUNCTION_NAME */
-
- insert_section_boundary_note ();
}
/* Output assembler code associated with defining the size of the
void
assemble_end_function (tree decl, const char *fnname)
{
- enum in_section save_text_section;
#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);
- function_section (decl); /* need to switch back */
+ 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;
- unlikely_text_section ();
- ASM_OUTPUT_LABEL (asm_out_file, cold_section_end_label);
- text_section ();
- ASM_OUTPUT_LABEL (asm_out_file, hot_section_end_label);
- if (save_text_section == in_unlikely_executed_text)
- unlikely_text_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);
}
}
\f
#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 ()))
+ if (ASM_NO_SKIP_IN_TEXT && (in_section->common.flags & SECTION_CODE) != 0)
{
unsigned HOST_WIDE_INT i;
for (i = 0; i < size; i++)
if (!dont_output_data && DECL_SIZE (decl) == 0)
{
- error ("%Jstorage size of %qD isn%'t known", decl, decl);
+ error ("storage size of %q+D isn%'t known", decl);
TREE_ASM_WRITTEN (decl) = 1;
return;
}
if (! dont_output_data
&& ! host_integerp (DECL_SIZE_UNIT (decl), 1))
{
- error ("%Jsize of variable %qD is too large", decl, decl);
+ error ("size of variable %q+D is too large", decl);
return;
}
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,
+ 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;
}
if (DECL_SECTION_NAME (decl) || dont_output_data)
;
/* We don't implement common thread-local data at present. */
- else if (DECL_THREAD_LOCAL (decl))
+ else if (DECL_THREAD_LOCAL_P (decl))
{
if (DECL_COMMON (decl))
sorry ("thread-local COMMON data not implemented");
#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);
+ warning (0, "requested alignment for %q+D is greater than "
+ "implemented alignment of %wu", decl, rounded);
#endif
/* If the target cannot output uninitialized but not common global data
variable_section (decl, reloc);
/* dbxout.c needs to know this. */
- if (in_text_section () || in_unlikely_text_section ())
+ if (in_section && (in_section->common.flags & SECTION_CODE) != 0)
DECL_IN_TEXT_SECTION (decl) = 1;
/* Output the alignment of this data. */
{
if (TREE_CODE (decl) == FUNCTION_DECL)
{
- /* Extern inline functions don't become needed when referenced. */
- if (!DECL_EXTERNAL (decl))
- cgraph_mark_needed_node (cgraph_node (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)
{
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
id = maybe_get_identifier (real_name);
if (id)
- mark_referenced (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);
}
#if 0
if (flag_shared_data)
- data_section ();
+ switch_to_section (data_section);
#endif
ASM_GENERATE_INTERNAL_LABEL (name, "LF", const_labelno);
/* By default, put trampoline templates in read-only data section. */
#ifdef TRAMPOLINE_SECTION
- TRAMPOLINE_SECTION ();
+ switch_to_section (TRAMPOLINE_SECTION);
#else
- readonly_data_section ();
+ switch_to_section (readonly_data_section);
#endif
/* Write the assembler code to define one. */
/* 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. */
+ 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)
/* 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. */
+ EXP must be reducible. */
struct addr_const GTY(())
{
case LABEL_DECL:
x = gen_rtx_MEM (FUNCTION_MODE,
- gen_rtx_LABEL_REF (VOIDmode, force_label_rtx (target)));
+ gen_rtx_LABEL_REF (Pmode, force_label_rtx (target)));
break;
case REAL_CST:
/* 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)))
static hashval_t
const_desc_hash (const void *ptr)
{
- return const_hash_1 (((struct constant_descriptor_tree *)ptr)->value);
+ return ((struct constant_descriptor_tree *)ptr)->hash;
}
static hashval_t
case CONSTRUCTOR:
{
- tree link;
+ unsigned HOST_WIDE_INT idx;
+ tree value;
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));
+ FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (exp), idx, value)
+ if (value)
+ hi = hi * 603 + const_hash_1 (value);
return hi;
}
static int
const_desc_eq (const void *p1, const void *p2)
{
- return compare_constant (((struct constant_descriptor_tree *)p1)->value,
- ((struct constant_descriptor_tree *)p2)->value);
+ 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
case CONSTRUCTOR:
{
- tree l1, l2;
+ 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;
}
- for (l1 = CONSTRUCTOR_ELTS (t1), l2 = CONSTRUCTOR_ELTS (t2);
- l1 && l2;
- l1 = TREE_CHAIN (l1), l2 = TREE_CHAIN (l2))
+ 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 (TREE_VALUE (l1), TREE_VALUE (l2)))
+ if (!compare_constant (c1->value, c2->value))
return 0;
/* ... and that they apply to the same fields! */
if (typecode == ARRAY_TYPE)
{
- if (! compare_constant (TREE_PURPOSE (l1),
- TREE_PURPOSE (l2)))
+ if (!compare_constant (c1->index, c2->index))
return 0;
}
else
{
- if (TREE_PURPOSE (l1) != TREE_PURPOSE (l2))
+ if (c1->index != c2->index)
return 0;
}
}
- return l1 == NULL_TREE && l2 == NULL_TREE;
+ return 1;
}
case ADDR_EXPR:
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));
-
+ 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;
}
/* Look up EXP in the table of constant descriptors. If we didn't find
it, create a new one. */
key.value = exp;
- loc = htab_find_slot (const_desc_htab, &key, INSERT);
+ 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;
}
TREE_ASM_WRITTEN (exp) = 1;
if (IN_NAMED_SECTION (exp))
- named_section (exp, NULL, reloc);
+ switch_to_section (get_named_section (exp, NULL, reloc));
else
- targetm.asm_out.select_section (exp, reloc, align);
+ switch_to_section (targetm.asm_out.select_section (exp, reloc, align));
if (align > BITS_PER_UNIT)
{
struct constant_descriptor_tree key;
key.value = exp;
- desc = htab_find (const_desc_htab, &key);
+ key.hash = const_hash_1 (exp);
+ desc = htab_find_with_hash (const_desc_htab, &key, key.hash);
return (desc ? desc->rtl : NULL_RTX);
}
}
/* First switch to correct section. */
- targetm.asm_out.select_rtx_section (desc->mode, x, desc->align);
+ switch_to_section (targetm.asm_out.select_rtx_section (desc->mode, x,
+ desc->align));
#ifdef ASM_OUTPUT_SPECIAL_POOL_ENTRY
ASM_OUTPUT_SPECIAL_POOL_ENTRY (asm_out_file, x, desc->mode,
/* Make sure all constants in SECTION_MERGE and not SECTION_STRINGS
sections have proper size. */
if (desc->align > GET_MODE_BITSIZE (desc->mode)
- && in_section == in_named
- && get_named_section_flags (in_named_name) & SECTION_MERGE)
+ && in_section
+ && (in_section->common.flags & SECTION_MERGE))
assemble_align (desc->align);
#ifdef ASM_OUTPUT_SPECIAL_POOL_ENTRY
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:
- for (tem = CONSTRUCTOR_ELTS (exp); tem; tem = TREE_CHAIN (tem))
- if (TREE_VALUE (tem) != 0)
- reloc |= compute_reloc_for_constant (TREE_VALUE (tem));
-
+ {
+ 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:
case NOP_EXPR:
case CONVERT_EXPR:
case NON_LVALUE_EXPR:
+ case VIEW_CONVERT_EXPR:
output_addressed_constants (TREE_OPERAND (exp, 0));
break;
case CONSTRUCTOR:
- for (tem = CONSTRUCTOR_ELTS (exp); tem; tem = TREE_CHAIN (tem))
- if (TREE_VALUE (tem) != 0)
- output_addressed_constants (TREE_VALUE (tem));
-
+ {
+ unsigned HOST_WIDE_INT idx;
+ FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (exp), idx, tem)
+ if (tem != 0)
+ output_addressed_constants (tem);
+ }
break;
default:
if ((TREE_CODE (TREE_TYPE (value)) == UNION_TYPE
|| TREE_CODE (TREE_TYPE (value)) == RECORD_TYPE)
&& TREE_CONSTANT (value)
- && CONSTRUCTOR_ELTS (value))
+ && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (value)))
{
+ unsigned HOST_WIDE_INT idx;
tree elt;
bool absolute = true;
- for (elt = CONSTRUCTOR_ELTS (value); elt; elt = TREE_CHAIN (elt))
+ FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (value), idx, elt)
{
tree reloc;
- value = TREE_VALUE (elt);
- reloc = initializer_constant_valid_p (value, TREE_TYPE (value));
+ reloc = initializer_constant_valid_p (elt, TREE_TYPE (elt));
if (!reloc)
return NULL_TREE;
if (reloc != null_pointer_node)
if (value
&& TREE_CODE (value) == FUNCTION_DECL
&& ((decl_function_context (value) && !DECL_NO_STATIC_CHAIN (value))
- || DECL_NON_ADDR_CONST_P (value)))
+ || DECL_DLLIMPORT_P (value)))
return NULL_TREE;
return value;
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));
+ }
+
/* 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)
- exp = TREE_OPERAND (exp, 0);
+ {
+ 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)
+ internal_error ("no-op convert from %wd to %wd bytes in initializer",
+ op_size, type_size);
+
+ exp = TREE_OPERAND (exp, 0);
+ }
code = TREE_CODE (TREE_TYPE (exp));
thissize = int_size_in_bytes (TREE_TYPE (exp));
/* Allow a constructor with no elements for any data type.
This means to fill the space with zeros. */
- if (TREE_CODE (exp) == CONSTRUCTOR && CONSTRUCTOR_ELTS (exp) == 0)
+ if (TREE_CODE (exp) == CONSTRUCTOR
+ && VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (exp)))
{
assemble_zeros (size);
return;
array_size_for_constructor (tree val)
{
tree max_index, i;
+ unsigned HOST_WIDE_INT cnt;
+ tree index, value;
/* 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
return TREE_STRING_LENGTH (val);
max_index = NULL_TREE;
- for (i = CONSTRUCTOR_ELTS (val); i; i = TREE_CHAIN (i))
+ FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (val), cnt, index, value)
{
- tree index = TREE_PURPOSE (i);
-
if (TREE_CODE (index) == RANGE_EXPR)
index = TREE_OPERAND (index, 1);
if (max_index == NULL_TREE || tree_int_cst_lt (max_index, index))
unsigned int align)
{
tree type = TREE_TYPE (exp);
- tree link, field = 0;
+ tree field = 0;
tree min_index = 0;
/* Number of bytes output or skipped so far.
In other words, current position within the constructor. */
/* 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);
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 (link = CONSTRUCTOR_ELTS (exp);
- link;
- link = TREE_CHAIN (link),
- field = field ? TREE_CHAIN (field) : 0)
+ for (cnt = 0;
+ VEC_iterate (constructor_elt, CONSTRUCTOR_ELTS (exp), cnt, ce);
+ cnt++, field = field ? TREE_CHAIN (field) : 0)
{
- tree val = TREE_VALUE (link);
+ 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)
- && TREE_PURPOSE (link) != 0)
- field = TREE_PURPOSE (link);
+ && ce->index != 0)
+ field = ce->index;
else if (TREE_CODE (type) == ARRAY_TYPE)
- index = TREE_PURPOSE (link);
+ index = ce->index;
#ifdef ASM_COMMENT_START
if (field && flag_verbose_asm)
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;
}
/* 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;
}
merge_weak (tree newdecl, tree olddecl)
{
if (DECL_WEAK (newdecl) == DECL_WEAK (olddecl))
- return;
+ {
+ 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))
{
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 ("%Jweak declaration of %qD must precede definition",
- newdecl, newdecl);
+ 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 ("%Jweak declaration of %qD after first use results "
- "in unspecified behavior", newdecl, newdecl);
+ warning (0, "weak declaration of %q+D after first use results "
+ "in unspecified behavior", newdecl);
if (SUPPORTS_WEAK)
{
declare_weak (tree decl)
{
if (! TREE_PUBLIC (decl))
- error ("%Jweak declaration of %qD must be public", decl, decl);
+ error ("weak declaration of %q+D must be public", decl);
else if (TREE_CODE (decl) == FUNCTION_DECL && TREE_ASM_WRITTEN (decl))
- error ("%Jweak declaration of %qD must precede definition", decl, 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 ("%Jweak declaration of %qD not supported", decl, decl);
+ warning (0, "weak declaration of %q+D not supported", decl);
mark_weak (decl);
}
-/* Emit any pending weak declarations. */
-
-void
-weak_finish (void)
+static void
+weak_finish_1 (tree decl)
{
- tree t;
-
- for (t = weak_decls; t; t = TREE_CHAIN (t))
- {
- tree decl = TREE_VALUE (t);
#if defined (ASM_WEAKEN_DECL) || defined (ASM_WEAKEN_LABEL)
- const char *const name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
+ const char *const name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
#endif
- if (! TREE_USED (decl))
- continue;
+ if (! TREE_USED (decl))
+ return;
#ifdef ASM_WEAKEN_DECL
- ASM_WEAKEN_DECL (asm_out_file, decl, name, NULL);
+ ASM_WEAKEN_DECL (asm_out_file, decl, name, NULL);
#else
#ifdef ASM_WEAKEN_LABEL
- ASM_WEAKEN_LABEL (asm_out_file, name);
+ ASM_WEAKEN_LABEL (asm_out_file, name);
#else
#ifdef ASM_OUTPUT_WEAK_ALIAS
- warning ("only weak aliases are supported in this configuration");
- return;
+ {
+ 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);
}
}
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)
of an alias. This requires that the decl have been defined. Aliases
that precede their definition have to be queued for later processing. */
-struct alias_pair GTY(())
+typedef struct alias_pair GTY(())
{
tree decl;
tree target;
-};
-typedef struct alias_pair *alias_pair;
+} alias_pair;
/* Define gc'd vector type. */
-DEF_VEC_GC_P(alias_pair);
+DEF_VEC_O(alias_pair);
+DEF_VEC_ALLOC_O(alias_pair,gc);
-static GTY(()) VEC(alias_pair) *alias_pairs;
+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. */
struct cgraph_node *fnode = NULL;
struct cgraph_varpool_node *vnode = NULL;
- /* C++ thunk emitting code produces aliases late in the game.
- Avoid confusing cgraph code in that case. */
- if (!cgraph_global_info_ready)
+ if (TREE_CODE (decl) == FUNCTION_DECL)
{
- 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);
- }
+ 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)
{
- cgraph_mark_needed_node (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)
tree node is DECL to have the value of the tree node TARGET. */
static void
-do_assemble_alias (tree decl, tree target ATTRIBUTE_UNUSED)
+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. */
*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
}
finish_aliases_1 (void)
{
unsigned i;
- alias_pair p;
+ alias_pair *p;
for (i = 0; VEC_iterate (alias_pair, alias_pairs, i, p); i++)
{
target_decl = find_decl_and_mark_needed (p->decl, p->target);
if (target_decl == NULL)
- error ("%J%qD aliased to undefined symbol %qE",
- p->decl, p->decl, p->target);
- else if (DECL_EXTERNAL (target_decl))
- error ("%J%qD aliased to external symbol %qE",
- p->decl, p->decl, p->target);
+ {
+ 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));
}
}
finish_aliases_2 (void)
{
unsigned i;
- alias_pair p;
+ alias_pair *p;
for (i = 0; VEC_iterate (alias_pair, alias_pairs, i, p); i++)
do_assemble_alias (p->decl, p->target);
- alias_pairs = NULL;
+ VEC_truncate (alias_pair, alias_pairs, 0);
}
/* Emit an assembler directive to make the symbol for DECL an alias to
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);
+ 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. */
/* 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. */
- DECL_EXTERNAL (decl) = 0;
+ if (! is_weakref)
+ DECL_EXTERNAL (decl) = 0;
/* Allow aliases to aliases. */
if (TREE_CODE (decl) == FUNCTION_DECL)
do_assemble_alias (decl, target);
else
{
- alias_pair p;
-
- p = ggc_alloc (sizeof (struct alias_pair));
+ alias_pair *p = VEC_safe_push (alias_pair, gc, alias_pairs, NULL);
p->decl = decl;
p->target = target;
- VEC_safe_push (alias_pair, alias_pairs, p);
}
}
assemble_name (asm_out_file, name);
fprintf (asm_out_file, "\n");
#else
- warning ("visibility attribute not supported in this configuration; ignored");
+ warning (OPT_Wattributes, "visibility attribute not supported "
+ "in this configuration; ignored");
#endif
}
void
init_varasm_once (void)
{
- in_named_htab = htab_create_ggc (31, in_named_entry_hash,
- in_named_entry_eq, NULL);
+ section_htab = htab_create_ggc (31, section_entry_hash,
+ section_entry_eq, NULL);
const_desc_htab = htab_create_ggc (1009, const_desc_hash,
const_desc_eq, NULL);
const_alias_set = new_alias_set ();
+
+#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
+
+ targetm.asm_out.init_sections ();
+
+ if (readonly_data_section == NULL)
+ readonly_data_section = text_section;
}
-static enum tls_model
-decl_tls_model (tree decl)
+enum tls_model
+decl_default_tls_model (tree decl)
{
enum tls_model kind;
- tree attr = lookup_attribute ("tls_model", DECL_ATTRIBUTES (decl));
bool is_local;
- if (attr)
- {
- attr = TREE_VALUE (TREE_VALUE (attr));
- gcc_assert (TREE_CODE (attr) == STRING_CST);
-
- if (!strcmp (TREE_STRING_POINTER (attr), "local-exec"))
- kind = TLS_MODEL_LOCAL_EXEC;
- else if (!strcmp (TREE_STRING_POINTER (attr), "initial-exec"))
- kind = TLS_MODEL_INITIAL_EXEC;
- else if (!strcmp (TREE_STRING_POINTER (attr), "local-dynamic"))
- kind = optimize ? TLS_MODEL_LOCAL_DYNAMIC : TLS_MODEL_GLOBAL_DYNAMIC;
- else if (!strcmp (TREE_STRING_POINTER (attr), "global-dynamic"))
- kind = TLS_MODEL_GLOBAL_DYNAMIC;
- else
- gcc_unreachable ();
- return kind;
- }
-
is_local = targetm.binds_local_p (decl);
if (!flag_shlib)
{
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)
flags = SECTION_CODE;
else if (decl && decl_readonly_section_1 (decl, reloc, shlib))
flags = 0;
- else if (unlikely_text_section_name
- && strcmp (name, unlikely_text_section_name) == 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 (decl))
+ if (decl && TREE_CODE (decl) == VAR_DECL && DECL_THREAD_LOCAL_P (decl))
flags |= SECTION_TLS | SECTION_WRITE;
if (strcmp (name, ".bss") == 0
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_GAS_COMDAT_GROUP && (flags & SECTION_LINKONCE))
- && ! named_section_first_declaration (name))
+ if (!(HAVE_COMDAT_GROUP && (flags & SECTION_LINKONCE))
+ && (flags & SECTION_DECLARED))
{
fprintf (asm_out_file, "\t.section\t%s\n", name);
return;
*f++ = 'S';
if (flags & SECTION_TLS)
*f++ = 'T';
- if (HAVE_GAS_COMDAT_GROUP && (flags & SECTION_LINKONCE))
+ if (HAVE_COMDAT_GROUP && (flags & SECTION_LINKONCE))
*f++ = 'G';
*f = '\0';
if (flags & SECTION_ENTSIZE)
fprintf (asm_out_file, ",%d", flags & SECTION_ENTSIZE);
- if (HAVE_GAS_COMDAT_GROUP && (flags & SECTION_LINKONCE))
+ if (HAVE_COMDAT_GROUP && (flags & SECTION_LINKONCE))
fprintf (asm_out_file, ",%s,comdat",
lang_hooks.decls.comdat_group (decl));
}
\f
/* The lame default section selector. */
-void
+section *
default_select_section (tree decl, int reloc,
unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED)
{
- bool readonly = false;
-
if (DECL_P (decl))
{
if (decl_readonly_section (decl, reloc))
- readonly = true;
+ return readonly_data_section;
}
else if (TREE_CODE (decl) == CONSTRUCTOR)
{
|| !TREE_READONLY (decl)
|| TREE_SIDE_EFFECTS (decl)
|| !TREE_CONSTANT (decl)))
- readonly = true;
+ return readonly_data_section;
}
else if (TREE_CODE (decl) == STRING_CST)
- readonly = true;
+ return readonly_data_section;
else if (! (flag_pic && reloc))
- readonly = true;
+ return readonly_data_section;
- if (readonly)
- readonly_data_section ();
- else
- data_section ();
+ return data_section;
}
-/* A helper function for default_elf_select_section and
- default_elf_unique_section. Categorizes the DECL. */
-
enum section_category
-{
- SECCAT_TEXT,
-
- SECCAT_RODATA,
- SECCAT_RODATA_MERGE_STR,
- SECCAT_RODATA_MERGE_STR_INIT,
- SECCAT_RODATA_MERGE_CONST,
- SECCAT_SRODATA,
-
- SECCAT_DATA,
-
- /* To optimize loading of shared programs, define following subsections
- of data section:
- _REL Contains data that has relocations, so they get grouped
- together and dynamic linker will visit fewer pages in memory.
- _RO Contains data that is otherwise read-only. This is useful
- with prelinking as most relocations won't be dynamically
- linked and thus stay read only.
- _LOCAL Marks data containing relocations only to local objects.
- These relocations will get fully resolved by prelinking. */
- SECCAT_DATA_REL,
- SECCAT_DATA_REL_LOCAL,
- SECCAT_DATA_REL_RO,
- SECCAT_DATA_REL_RO_LOCAL,
-
- SECCAT_SDATA,
- SECCAT_TDATA,
-
- SECCAT_BSS,
- SECCAT_SBSS,
- SECCAT_TBSS
-};
-
-static enum section_category
-categorize_decl_for_section (tree, int, int);
-
-static enum section_category
categorize_decl_for_section (tree decl, int reloc, int shlib)
{
enum section_category ret;
ret = SECCAT_RODATA;
/* There are no read-only thread-local sections. */
- if (TREE_CODE (decl) == VAR_DECL && DECL_THREAD_LOCAL (decl))
+ 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. */
/* Select a section based on the above categorization. */
-void
+section *
default_elf_select_section (tree decl, int reloc,
unsigned HOST_WIDE_INT align)
{
- default_elf_select_section_1 (decl, reloc, align, flag_pic);
+ return default_elf_select_section_1 (decl, reloc, align, flag_pic);
}
-void
+section *
default_elf_select_section_1 (tree decl, int reloc,
unsigned HOST_WIDE_INT align, int shlib)
{
/* We're not supposed to be called on FUNCTION_DECLs. */
gcc_unreachable ();
case SECCAT_RODATA:
- readonly_data_section ();
- return;
+ return readonly_data_section;
case SECCAT_RODATA_MERGE_STR:
- mergeable_string_section (decl, align, 0);
- return;
+ return mergeable_string_section (decl, align, 0);
case SECCAT_RODATA_MERGE_STR_INIT:
- mergeable_string_section (DECL_INITIAL (decl), align, 0);
- return;
+ return mergeable_string_section (DECL_INITIAL (decl), align, 0);
case SECCAT_RODATA_MERGE_CONST:
- mergeable_constant_section (DECL_MODE (decl), align, 0);
- return;
+ return mergeable_constant_section (DECL_MODE (decl), align, 0);
case SECCAT_SRODATA:
sname = ".sdata2";
break;
case SECCAT_DATA:
- data_section ();
- return;
+ return data_section;
case SECCAT_DATA_REL:
sname = ".data.rel";
break;
sname = ".tdata";
break;
case SECCAT_BSS:
-#ifdef BSS_SECTION_ASM_OP
- bss_section ();
- return;
-#else
+ if (bss_section)
+ return bss_section;
sname = ".bss";
break;
-#endif
case SECCAT_SBSS:
sname = ".sbss";
break;
if (!DECL_P (decl))
decl = NULL_TREE;
- named_section (decl, sname, reloc);
+ return get_named_section (decl, sname, reloc);
}
/* Construct a unique section name based on the decl name and the
void
default_unique_section_1 (tree decl, int reloc, int shlib)
{
- bool one_only = DECL_ONE_ONLY (decl);
+ /* 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;
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." : ".data.";
+ prefix = one_only ? ".gnu.linkonce.d.rel.ro.local."
+ : ".data.rel.ro.local.";
break;
case SECCAT_SDATA:
prefix = one_only ? ".gnu.linkonce.s." : ".sdata.";
DECL_SECTION_NAME (decl) = build_string (nlen + plen, string);
}
-void
+section *
default_select_rtx_section (enum machine_mode mode ATTRIBUTE_UNUSED,
rtx x,
unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED)
case CONST:
case SYMBOL_REF:
case LABEL_REF:
- data_section ();
- return;
+ return data_section;
default:
break;
}
- readonly_data_section ();
+ return readonly_data_section;
}
-void
+section *
default_elf_select_rtx_section (enum machine_mode mode, rtx x,
unsigned HOST_WIDE_INT align)
{
{
case CONST:
case SYMBOL_REF:
- named_section (NULL_TREE, ".data.rel.ro", 3);
- return;
+ return get_named_section (NULL, ".data.rel.ro", 3);
case LABEL_REF:
- named_section (NULL_TREE, ".data.rel.ro.local", 1);
- return;
+ return get_named_section (NULL, ".data.rel.ro.local", 1);
default:
break;
}
- mergeable_constant_section (mode, align, 0);
+ return mergeable_constant_section (mode, align, 0);
}
/* Set the generally applicable flags on the SYMBOL_REF for EXP. */
flags |= SYMBOL_FLAG_FUNCTION;
if (targetm.binds_local_p (decl))
flags |= SYMBOL_FLAG_LOCAL;
- if (TREE_CODE (decl) == VAR_DECL && DECL_THREAD_LOCAL (decl))
- flags |= decl_tls_model (decl) << SYMBOL_FLAG_TLS_SHIFT;
+ 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
/* 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 explicitly tells us so. */
- else if (DECL_VISIBILITY_SPECIFIED (exp) && DECL_VISIBILITY (exp) != VISIBILITY_DEFAULT)
+ /* 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;
- /* Otherwise, variables defined outside this object may not be local. */
+ /* Variables defined outside this object might not be local. */
else if (DECL_EXTERNAL (exp))
local_p = false;
- /* Linkonce and weak data are never local. */
- else if (DECL_ONE_ONLY (exp) || DECL_WEAK (exp))
- local_p = false;
- /* If none of the above and visibility is not default, make local. */
+ /* 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)
if (trampolines_created)
flags |= SECTION_CODE;
- named_section_flags (".note.GNU-stack", flags);
+ 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;
+
+ if (new_section->common.flags & 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);
+ }
+ else
+ new_section->unnamed.callback (new_section->unnamed.data);
+
+ new_section->common.flags |= SECTION_DECLARED;
}
#include "gt-varasm.h"
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