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tree.h (alias_diag_flags): New enum.

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* tree.h (alias_diag_flags): New enum.
        (alias_pair): Add an 'emitted_diags' field.
        * varasm.c (finish_aliases_1): Honor and update
        * p->emitted_diags.
        (assemble_alias): Initialize emitted_diags of new pairs.

From-SVN: r163425
This commit is contained in:
Olivier Hainque 2010-08-20 22:08:41 +00:00 • committed by Olivier Hainque
parent 39acb18f66
commit b4d456ffc0
3 changed files with 39 additions and 12 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2010-08-20 Olivier Hainque <hainque@adacore.com>
* tree.h (alias_diag_flags): New enum.
(alias_pair): Add an 'emitted_diags' field.
* varasm.c (finish_aliases_1): Honor and update p->emitted_diags.
(assemble_alias): Initialize emitted_diags of new pairs.
2010-08-20 Eric Botcazou <ebotcazou@adacore.com>
* config/rs6000/aix.h (STACK_CHECK_STATIC_BUILTIN): Define to 1.

13
gcc/tree.h
View file

@ -184,10 +184,21 @@ extern const char *const tree_code_name[];
of an alias. This requires that the decl have been defined. Aliases
that precede their definition have to be queued for later processing. */
/* The deferred processing proceeds in several passes. We memorize the
diagnostics emitted for a pair to prevent repeating messages when the
queue gets re-scanned after possible updates. */
typedef enum {
ALIAS_DIAG_NONE = 0x0,
ALIAS_DIAG_TO_UNDEF = 0x1,
ALIAS_DIAG_TO_EXTERN = 0x2
} alias_diag_flags;
typedef struct GTY(()) alias_pair
{
tree decl;
tree target;
tree target;
int emitted_diags; /* alias_diags already emitted for this pair. */
} alias_pair;
/* Define gc'd vector type. */

31
gcc/varasm.c
View file

@ -5444,19 +5444,27 @@ finish_aliases_1 (void)
target_decl = find_decl_and_mark_needed (p->decl, p->target);
if (target_decl == NULL)
{
if (! lookup_attribute ("weakref", DECL_ATTRIBUTES (p->decl)))
error ("%q+D aliased to undefined symbol %qE",
p->decl, p->target);
if (! (p->emitted_diags & ALIAS_DIAG_TO_UNDEF)
&& ! lookup_attribute ("weakref", DECL_ATTRIBUTES (p->decl)))
{
error ("%q+D aliased to undefined symbol %qE",
p->decl, p->target);
p->emitted_diags |= ALIAS_DIAG_TO_UNDEF;
}
}
else if (DECL_EXTERNAL (target_decl)
/* We use local aliases for C++ thunks to force the tailcall
to bind locally. Of course this is a hack - to keep it
working do the following (which is not strictly correct). */
&& (! TREE_CODE (target_decl) == FUNCTION_DECL
|| ! DECL_VIRTUAL_P (target_decl))
else if (! (p->emitted_diags & ALIAS_DIAG_TO_EXTERN)
&& DECL_EXTERNAL (target_decl)
/* We use local aliases for C++ thunks to force the tailcall
to bind locally. This is a hack - to keep it working do
the following (which is not strictly correct). */
&& (! TREE_CODE (target_decl) == FUNCTION_DECL
|| ! DECL_VIRTUAL_P (target_decl))
&& ! lookup_attribute ("weakref", DECL_ATTRIBUTES (p->decl)))
error ("%q+D aliased to external symbol %qE",
p->decl, p->target);
{
error ("%q+D aliased to external symbol %qE",
p->decl, p->target);
p->emitted_diags |= ALIAS_DIAG_TO_EXTERN;
}
}
}
@ -5549,6 +5557,7 @@ assemble_alias (tree decl, tree target)
alias_pair *p = VEC_safe_push (alias_pair, gc, alias_pairs, NULL);
p->decl = decl;
p->target = target;
p->emitted_diags = ALIAS_DIAG_NONE;
}
}