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re PR tree-optimization/64330 (IPA-ICF merges const exported vars that could be addressable in other TUs)

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Fix for PR64330.

	PR tree-optimization/64330
	* ipa-icf.c (sem_variable::parse): Add checking
	for externally visible symbols and do not introduce
	an alias for an external declaration.

From-SVN: r218864
This commit is contained in:
Martin Liska 2014-12-18 14:32:18 +01:00 committed by Martin Liska
parent 2ddeb89bf5
commit 09cb9532c4
2 changed files with 14 additions and 3 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2014-12-18 Martin Liska <mliska@suse.cz>
PR tree-optimization/64330
* ipa-icf.c (sem_variable::parse): Add checking
for externally visible symbols and do not introduce
an alias for an external declaration.
2014-12-18 Jan Hubicka <hubicka@ucw.cz>
PR bootstrap/63573

10
gcc/ipa-icf.c
View File

@ -1139,10 +1139,14 @@ sem_variable::parse (varpool_node *node, bitmap_obstack *stack)
tree decl = node->decl;
bool readonly = TYPE_P (decl) ? TYPE_READONLY (decl) : TREE_READONLY (decl);
bool can_handle = readonly && (DECL_VIRTUAL_P (decl)
|| !TREE_ADDRESSABLE (decl));
if (!readonly)
return NULL;
if (!can_handle)
bool can_handle = DECL_VIRTUAL_P (decl)
|| flag_merge_constants >= 2
|| (!TREE_ADDRESSABLE (decl) && !node->externally_visible);
if (!can_handle || DECL_EXTERNAL (decl))
return NULL;
tree ctor = ctor_for_folding (decl);