/* Handle #pragma, system V.4 style. Supports #pragma weak and #pragma pack.
- Copyright (C) 1992, 1997, 1998, 1999, 2000, 2001, 2002
+ Copyright (C) 1992, 1997, 1998, 1999, 2000, 2001, 2002, 2003
Free Software Foundation, Inc.
This file is part of GCC.
#include "config.h"
#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
#include "rtl.h"
#include "tree.h"
#include "function.h"
#define GCC_BAD(msgid) do { warning (msgid); return; } while (0)
#define GCC_BAD2(msgid, arg) do { warning (msgid, arg); return; } while (0)
-#ifdef HANDLE_PRAGMA_PACK
-static void handle_pragma_pack PARAMS ((cpp_reader *));
-
-#ifdef HANDLE_PRAGMA_PACK_PUSH_POP
-typedef struct align_stack
+typedef struct align_stack GTY(())
{
int alignment;
unsigned int num_pushes;
struct align_stack * prev;
} align_stack;
-static struct align_stack * alignment_stack = NULL;
+static GTY(()) struct align_stack * alignment_stack;
+#ifdef HANDLE_PRAGMA_PACK
+static void handle_pragma_pack (cpp_reader *);
+
+#ifdef HANDLE_PRAGMA_PACK_PUSH_POP
/* If we have a "global" #pragma pack(<n>) in effect when the first
#pragma pack(push,<n>) is encountered, this stores the value of
maximum_field_alignment in effect. When the final pop_alignment()
#define SET_GLOBAL_ALIGNMENT(ALIGN) \
(default_alignment = maximum_field_alignment = (ALIGN))
-static void push_alignment PARAMS ((int, tree));
-static void pop_alignment PARAMS ((tree));
-static void mark_align_stack PARAMS ((void *));
+static void push_alignment (int, tree);
+static void pop_alignment (tree);
/* Push an alignment value onto the stack. */
static void
-push_alignment (alignment, id)
- int alignment;
- tree id;
+push_alignment (int alignment, tree id)
{
if (alignment_stack == NULL
|| alignment_stack->alignment != alignment
{
align_stack * entry;
- entry = (align_stack *) xmalloc (sizeof (* entry));
+ entry = ggc_alloc (sizeof (* entry));
entry->alignment = alignment;
entry->num_pushes = 1;
/* Undo a push of an alignment onto the stack. */
static void
-pop_alignment (id)
- tree id;
+pop_alignment (tree id)
{
align_stack * entry;
else
maximum_field_alignment = entry->alignment;
- free (alignment_stack);
-
alignment_stack = entry;
}
}
-
-static void
-mark_align_stack (p)
- void *p;
-{
- align_stack *a = *(align_stack **) p;
-
- while (a)
- {
- ggc_mark_tree (a->id);
- a = a->prev;
- }
-}
#else /* not HANDLE_PRAGMA_PACK_PUSH_POP */
#define SET_GLOBAL_ALIGNMENT(ALIGN) (maximum_field_alignment = (ALIGN))
#define push_alignment(ID, N) \
#pragma pack (pop)
#pragma pack (pop, ID) */
static void
-handle_pragma_pack (dummy)
- cpp_reader *dummy ATTRIBUTE_UNUSED;
+handle_pragma_pack (cpp_reader *dummy ATTRIBUTE_UNUSED)
{
tree x, id = 0;
int align = -1;
}
#endif /* HANDLE_PRAGMA_PACK */
-#ifdef HANDLE_PRAGMA_WEAK
-static void apply_pragma_weak PARAMS ((tree, tree));
-static void handle_pragma_weak PARAMS ((cpp_reader *));
+static GTY(()) tree pending_weaks;
-static tree pending_weaks;
+#ifdef HANDLE_PRAGMA_WEAK
+static void apply_pragma_weak (tree, tree);
+static void handle_pragma_weak (cpp_reader *);
static void
-apply_pragma_weak (decl, value)
- tree decl, value;
+apply_pragma_weak (tree decl, tree value)
{
if (value)
- decl_attributes (&decl, build_tree_list (get_identifier ("alias"),
- build_tree_list (NULL, value)),
- 0);
+ {
+ value = build_string (IDENTIFIER_LENGTH (value),
+ IDENTIFIER_POINTER (value));
+ decl_attributes (&decl, build_tree_list (get_identifier ("alias"),
+ build_tree_list (NULL, value)),
+ 0);
+ }
+
if (SUPPORTS_WEAK && DECL_EXTERNAL (decl) && TREE_USED (decl)
+ && !DECL_WEAK (decl) /* don't complain about a redundant #pragma */
&& TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
- warning_with_decl (decl, "applying #pragma weak `%s' after first use results in unspecified behavior");
+ warning ("%Japplying #pragma weak '%D' after first use results "
+ "in unspecified behavior", decl, decl);
declare_weak (decl);
}
void
-maybe_apply_pragma_weak (decl)
- tree decl;
+maybe_apply_pragma_weak (tree decl)
{
tree *p, t, id;
- /* Copied from the check in set_decl_assembler_name. */
- if (TREE_CODE (decl) == FUNCTION_DECL
- || (TREE_CODE (decl) == VAR_DECL
- && (TREE_STATIC (decl)
- || DECL_EXTERNAL (decl)
- || TREE_PUBLIC (decl))))
- id = DECL_ASSEMBLER_NAME (decl);
- else
+ /* Avoid asking for DECL_ASSEMBLER_NAME when it's not needed. */
+
+ /* No weak symbols pending, take the short-cut. */
+ if (!pending_weaks)
+ return;
+ /* If it's not visible outside this file, it doesn't matter whether
+ it's weak. */
+ if (!DECL_EXTERNAL (decl) && !TREE_PUBLIC (decl))
+ return;
+ /* If it's not a function or a variable, it can't be weak.
+ FIXME: what kinds of things are visible outside this file but
+ aren't functions or variables? Should this be an abort() instead? */
+ if (TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL)
return;
+ id = DECL_ASSEMBLER_NAME (decl);
+
for (p = &pending_weaks; (t = *p) ; p = &TREE_CHAIN (t))
if (id == TREE_PURPOSE (t))
{
/* #pragma weak name [= value] */
static void
-handle_pragma_weak (dummy)
- cpp_reader *dummy ATTRIBUTE_UNUSED;
+handle_pragma_weak (cpp_reader *dummy ATTRIBUTE_UNUSED)
{
tree name, value, x, decl;
enum cpp_ttype t;
decl = identifier_global_value (name);
if (decl && TREE_CODE_CLASS (TREE_CODE (decl)) == 'd')
- apply_pragma_weak (decl, value);
+ {
+ apply_pragma_weak (decl, value);
+ if (value)
+ assemble_alias (decl, value);
+ }
else
pending_weaks = tree_cons (name, value, pending_weaks);
}
#else
void
-maybe_apply_pragma_weak (decl)
- tree decl ATTRIBUTE_UNUSED;
+maybe_apply_pragma_weak (tree decl ATTRIBUTE_UNUSED)
{
}
#endif /* HANDLE_PRAGMA_WEAK */
-#ifdef HANDLE_PRAGMA_REDEFINE_EXTNAME
-static void handle_pragma_redefine_extname PARAMS ((cpp_reader *));
+static GTY(()) tree pending_redefine_extname;
-static tree pending_redefine_extname;
+#ifdef HANDLE_PRAGMA_REDEFINE_EXTNAME
+static void handle_pragma_redefine_extname (cpp_reader *);
/* #pragma redefined_extname oldname newname */
static void
-handle_pragma_redefine_extname (dummy)
- cpp_reader *dummy ATTRIBUTE_UNUSED;
+handle_pragma_redefine_extname (cpp_reader *dummy ATTRIBUTE_UNUSED)
{
tree oldname, newname, decl, x;
enum cpp_ttype t;
if (DECL_ASSEMBLER_NAME_SET_P (decl)
&& DECL_ASSEMBLER_NAME (decl) != newname)
warning ("#pragma redefine_extname conflicts with declaration");
- SET_DECL_ASSEMBLER_NAME (decl, newname);
+ change_decl_assembler_name (decl, newname);
}
else
- pending_redefine_extname
- = tree_cons (oldname, newname, pending_redefine_extname);
+ add_to_renaming_pragma_list(oldname, newname);
}
#endif
-#ifdef HANDLE_PRAGMA_EXTERN_PREFIX
-static void handle_pragma_extern_prefix PARAMS ((cpp_reader *));
+void
+add_to_renaming_pragma_list (tree oldname, tree newname)
+{
+ pending_redefine_extname
+ = tree_cons (oldname, newname, pending_redefine_extname);
+}
-static tree pragma_extern_prefix;
+static GTY(()) tree pragma_extern_prefix;
+
+#ifdef HANDLE_PRAGMA_EXTERN_PREFIX
+static void handle_pragma_extern_prefix (cpp_reader *);
/* #pragma extern_prefix "prefix" */
static void
-handle_pragma_extern_prefix (dummy)
- cpp_reader *dummy ATTRIBUTE_UNUSED;
+handle_pragma_extern_prefix (cpp_reader *dummy ATTRIBUTE_UNUSED)
{
tree prefix, x;
enum cpp_ttype t;
}
#endif
-/* Hook from the front ends to apply the results of one of the preceeding
+/* Hook from the front ends to apply the results of one of the preceding
pragmas that rename variables. */
tree
-maybe_apply_renaming_pragma (decl, asmname)
- tree decl, asmname;
+maybe_apply_renaming_pragma (tree decl, tree asmname)
{
tree oldname;
{
const char *oldasmname = IDENTIFIER_POINTER (oldname) + 1;
if (asmname && strcmp (TREE_STRING_POINTER (asmname), oldasmname) != 0)
- warning ("asm declaration conficts with previous rename");
+ warning ("asm declaration conflicts with previous rename");
asmname = build_string (strlen (oldasmname), oldasmname);
}
-#ifdef HANDLE_PRAGMA_REDEFINE_EXTNAME
{
tree *p, t;
return build_string (strlen (newname), newname);
}
}
-#endif
#ifdef HANDLE_PRAGMA_EXTERN_PREFIX
if (pragma_extern_prefix && !asmname)
return asmname;
}
+/* Front-end wrapper for pragma registration to avoid dragging
+ cpplib.h in almost everywhere. */
+void
+c_register_pragma (const char *space, const char *name,
+ void (*handler) (struct cpp_reader *))
+{
+ cpp_register_pragma (parse_in, space, name, handler);
+}
+
+/* Set up front-end pragmas. */
void
-init_pragma ()
+init_pragma (void)
{
#ifdef HANDLE_PRAGMA_PACK
- cpp_register_pragma (parse_in, 0, "pack", handle_pragma_pack);
+ c_register_pragma (0, "pack", handle_pragma_pack);
#endif
#ifdef HANDLE_PRAGMA_WEAK
- cpp_register_pragma (parse_in, 0, "weak", handle_pragma_weak);
- ggc_add_tree_root (&pending_weaks, 1);
+ c_register_pragma (0, "weak", handle_pragma_weak);
#endif
#ifdef HANDLE_PRAGMA_REDEFINE_EXTNAME
- cpp_register_pragma (parse_in, 0, "redefine_extname",
- handle_pragma_redefine_extname);
- ggc_add_tree_root (&pending_redefine_extname, 1);
+ c_register_pragma (0, "redefine_extname", handle_pragma_redefine_extname);
#endif
#ifdef HANDLE_PRAGMA_EXTERN_PREFIX
- cpp_register_pragma (parse_in, 0, "extern_prefix",
- handle_pragma_extern_prefix);
- ggc_add_tree_root (&pragma_extern_prefix, 1);
+ c_register_pragma (0, "extern_prefix", handle_pragma_extern_prefix);
#endif
#ifdef REGISTER_TARGET_PRAGMAS
- REGISTER_TARGET_PRAGMAS (parse_in);
-#endif
-
-#ifdef HANDLE_PRAGMA_PACK_PUSH_POP
- ggc_add_root (&alignment_stack, 1, sizeof(alignment_stack),
- mark_align_stack);
+ REGISTER_TARGET_PRAGMAS ();
#endif
}
+
+#include "gt-c-pragma.h"
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