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-rw-r--r--gcc/config/ia64/ia64.c53
-rw-r--r--gcc/doc/extend.texi13
-rw-r--r--gcc/doc/tm.texi8
-rw-r--r--gcc/output.h1
-rw-r--r--gcc/target-def.h5
-rw-r--r--gcc/target.h3
-rw-r--r--gcc/varasm.c15
7 files changed, 91 insertions, 7 deletions
diff --git a/gcc/config/ia64/ia64.c b/gcc/config/ia64/ia64.c
index dc4cb39..36c0d63 100644
--- a/gcc/config/ia64/ia64.c
+++ b/gcc/config/ia64/ia64.c
@@ -242,6 +242,7 @@ static void bundling (FILE *, int, rtx, rtx);
static void ia64_output_mi_thunk (FILE *, tree, HOST_WIDE_INT,
HOST_WIDE_INT, tree);
static void ia64_file_start (void);
+static void ia64_globalize_decl_name (FILE *, tree);
static section *ia64_select_rtx_section (enum machine_mode, rtx,
unsigned HOST_WIDE_INT);
@@ -265,6 +266,7 @@ static void ia64_vms_init_libfuncs (void)
ATTRIBUTE_UNUSED;
static tree ia64_handle_model_attribute (tree *, tree, tree, int, bool *);
+static tree ia64_handle_version_id_attribute (tree *, tree, tree, int, bool *);
static void ia64_encode_section_info (tree, rtx, int);
static rtx ia64_struct_value_rtx (tree, int);
static tree ia64_gimplify_va_arg (tree, tree, tree *, tree *);
@@ -282,6 +284,8 @@ static const struct attribute_spec ia64_attribute_table[] =
/* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */
{ "syscall_linkage", 0, 0, false, true, true, NULL },
{ "model", 1, 1, true, false, false, ia64_handle_model_attribute },
+ { "version_id", 1, 1, true, false, false,
+ ia64_handle_version_id_attribute },
{ NULL, 0, 0, false, false, false, NULL }
};
@@ -391,6 +395,9 @@ static const struct attribute_spec ia64_attribute_table[] =
#undef TARGET_ASM_FILE_START
#define TARGET_ASM_FILE_START ia64_file_start
+#undef TARGET_ASM_GLOBALIZE_DECL_NAME
+#define TARGET_ASM_GLOBALIZE_DECL_NAME ia64_globalize_decl_name
+
#undef TARGET_RTX_COSTS
#define TARGET_RTX_COSTS ia64_rtx_costs
#undef TARGET_ADDRESS_COST
@@ -2226,6 +2233,24 @@ emit_safe_across_calls (void)
fputc ('\n', asm_out_file);
}
+/* Globalize a declaration. */
+
+static void
+ia64_globalize_decl_name (FILE * stream, tree decl)
+{
+ const char *name = XSTR (XEXP (DECL_RTL (decl), 0), 0);
+ tree version_attr = lookup_attribute ("version_id", DECL_ATTRIBUTES (decl));
+ if (version_attr)
+ {
+ tree v = TREE_VALUE (TREE_VALUE (version_attr));
+ const char *p = TREE_STRING_POINTER (v);
+ fprintf (stream, "\t.alias %s#, \"%s{%s}\"\n", name, name, p);
+ }
+ targetm.asm_out.globalize_label (stream, name);
+ if (TREE_CODE (decl) == FUNCTION_DECL)
+ ASM_OUTPUT_TYPE_DIRECTIVE (stream, name, "function");
+}
+
/* Helper function for ia64_compute_frame_size: find an appropriate general
register to spill some special register to. SPECIAL_SPILL_MASK contains
bits in GR0 to GR31 that have already been allocated by this routine.
@@ -9189,10 +9214,7 @@ ia64_asm_output_external (FILE *file, tree decl, const char *name)
need something for external functions. */
if ((TARGET_HPUX_LD || !TARGET_GNU_AS)
&& TREE_CODE (decl) == FUNCTION_DECL)
- {
- ASM_OUTPUT_TYPE_DIRECTIVE (file, name, "function");
- (*targetm.asm_out.globalize_label) (file, name);
- }
+ (*targetm.asm_out.globalize_decl_name) (file, decl);
else if (need_visibility && !TARGET_GNU_AS)
(*targetm.asm_out.globalize_label) (file, name);
}
@@ -9778,4 +9800,27 @@ ia64_optimization_options (int level ATTRIBUTE_UNUSED,
}
+/* HP-UX version_id attribute.
+ For object foo, if the version_id is set to 1234 put out an alias
+ of '.alias foo "foo{1234}" We can't use "foo{1234}" in anything
+ other than an alias statement because it is an illegal symbol name. */
+
+static tree
+ia64_handle_version_id_attribute (tree *node ATTRIBUTE_UNUSED,
+ tree name ATTRIBUTE_UNUSED,
+ tree args,
+ int flags ATTRIBUTE_UNUSED,
+ bool *no_add_attrs)
+{
+ tree arg = TREE_VALUE (args);
+
+ if (TREE_CODE (arg) != STRING_CST)
+ {
+ error("version attribute is not a string");
+ *no_add_attrs = true;
+ return NULL_TREE;
+ }
+ return NULL_TREE;
+}
+
#include "gt-ia64.h"
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index 0eec8d2..8bbb316 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -2366,6 +2366,19 @@ for the function even if it appears that the function is not referenced.
This is useful, for example, when the function is referenced only in
inline assembly.
+@item version_id
+@cindex @code{version_id} attribute on IA64 HP-UX
+This attribute, attached to a global variable or function, renames a
+symbol to contain a version string, thus allowing for function level
+versioning. HP-UX system header files may use version level functioning
+for some system calls.
+
+@smallexample
+extern int foo () __attribute__((version_id ("20040821")));
+@end smallexample
+
+Calls to @var{foo} will be mapped to calls to @var{foo@{20040821@}}.
+
@item visibility ("@var{visibility_type}")
@cindex @code{visibility} attribute
This attribute affects the linkage of the declaration to which it is attached.
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi
index 3390575..b2292c3 100644
--- a/gcc/doc/tm.texi
+++ b/gcc/doc/tm.texi
@@ -7198,6 +7198,14 @@ The default implementation relies on a proper definition of
@code{GLOBAL_ASM_OP}.
@end deftypefn
+@deftypefn {Target Hook} void TARGET_ASM_GLOBALIZE_DECL_NAME (FILE *@var{stream}, tree @var{decl})
+This target hook is a function to output to the stdio stream
+@var{stream} some commands that will make the name associated with @var{decl}
+global; that is, available for reference from other files.
+
+The default implementation uses the TARGET_ASM_GLOBALIZE_LABEL target hook.
+@end deftypefn
+
@defmac ASM_WEAKEN_LABEL (@var{stream}, @var{name})
A C statement (sans semicolon) to output to the stdio stream
@var{stream} some commands that will make the label @var{name} weak;
diff --git a/gcc/output.h b/gcc/output.h
index ca010d9..8340d41 100644
--- a/gcc/output.h
+++ b/gcc/output.h
@@ -612,6 +612,7 @@ extern bool default_use_anchors_for_symbol_p (rtx);
extern bool default_binds_local_p (tree);
extern bool default_binds_local_p_1 (tree, int);
extern void default_globalize_label (FILE *, const char *);
+extern void default_globalize_decl_name (FILE *, tree);
extern void default_emit_unwind_label (FILE *, tree, int, int);
extern void default_emit_except_table_label (FILE *);
extern void default_internal_label (FILE *, const char *, unsigned long);
diff --git a/gcc/target-def.h b/gcc/target-def.h
index 8f7abd8..bc535eb 100644
--- a/gcc/target-def.h
+++ b/gcc/target-def.h
@@ -64,6 +64,10 @@ Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#define TARGET_ASM_GLOBALIZE_LABEL default_globalize_label
#endif
+#ifndef TARGET_ASM_GLOBALIZE_DECL_NAME
+#define TARGET_ASM_GLOBALIZE_DECL_NAME default_globalize_decl_name
+#endif
+
#ifndef TARGET_ASM_EMIT_UNWIND_LABEL
#define TARGET_ASM_EMIT_UNWIND_LABEL default_emit_unwind_label
#endif
@@ -253,6 +257,7 @@ Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
TARGET_ASM_UNALIGNED_INT_OP, \
TARGET_ASM_INTEGER, \
TARGET_ASM_GLOBALIZE_LABEL, \
+ TARGET_ASM_GLOBALIZE_DECL_NAME, \
TARGET_ASM_EMIT_UNWIND_LABEL, \
TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL, \
TARGET_UNWIND_EMIT, \
diff --git a/gcc/target.h b/gcc/target.h
index e86ba21..d43ea56 100644
--- a/gcc/target.h
+++ b/gcc/target.h
@@ -113,6 +113,9 @@ struct gcc_target
/* Output code that will globalize a label. */
void (* globalize_label) (FILE *, const char *);
+ /* Output code that will globalise a declaration. */
+ void (* globalize_decl_name) (FILE *, tree);
+
/* Output code that will emit a label for unwind info, if this
target requires such labels. Second argument is the decl the
unwind info is associated with, third is a boolean: true if
diff --git a/gcc/varasm.c b/gcc/varasm.c
index 0cb8f86..48055cf 100644
--- a/gcc/varasm.c
+++ b/gcc/varasm.c
@@ -489,7 +489,8 @@ asm_output_bss (FILE *file, tree decl ATTRIBUTE_UNUSED,
unsigned HOST_WIDE_INT size ATTRIBUTE_UNUSED,
unsigned HOST_WIDE_INT rounded)
{
- targetm.asm_out.globalize_label (file, name);
+ gcc_assert (strcmp (XSTR (XEXP (DECL_RTL (decl), 0), 0), name) == 0);
+ targetm.asm_out.globalize_decl_name (file, decl);
switch_to_section (bss_section);
#ifdef ASM_DECLARE_OBJECT_NAME
last_assemble_variable_decl = decl;
@@ -4739,11 +4740,11 @@ weak_finish (void)
static void
globalize_decl (tree decl)
{
- const char *name = XSTR (XEXP (DECL_RTL (decl), 0), 0);
#if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
if (DECL_WEAK (decl))
{
+ const char *name = XSTR (XEXP (DECL_RTL (decl), 0), 0);
tree *p, t;
#ifdef ASM_WEAKEN_DECL
@@ -4777,7 +4778,7 @@ globalize_decl (tree decl)
}
#endif
- targetm.asm_out.globalize_label (asm_out_file, name);
+ targetm.asm_out.globalize_decl_name (asm_out_file, decl);
}
/* We have to be able to tell cgraph about the needed-ness of the target
@@ -5913,6 +5914,14 @@ default_globalize_label (FILE * stream, const char *name)
}
#endif /* GLOBAL_ASM_OP */
+/* Default function to output code that will globalize a declaration. */
+void
+default_globalize_decl_name (FILE * stream, tree decl)
+{
+ const char *name = XSTR (XEXP (DECL_RTL (decl), 0), 0);
+ targetm.asm_out.globalize_label (stream, name);
+}
+
/* Default function to output a label for unwind information. The
default is to do nothing. A target that needs nonlocal labels for
unwind information must provide its own function to do this. */
generated by cgit v1.1 at 2024-09-30 15:25:53 +0000