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ipa.c (cgraph_remove_unreachable_nodes): External references can always be removed. 

* ipa.c (cgraph_remove_unreachable_nodes): External references can always
	be removed.
	(cgraph_externally_visible_p): We can not bring local comdats that are known
	to linker; fix handling of internal visibility.
	(function_and_variable_visibility): Likewise.

From-SVN: r165057
This commit is contained in:
Jan Hubicka 2010-10-06 19:24:40 +02:00 committed by Jan Hubicka
parent 8cfaf4c938
commit 0e9ea52bfc
2 changed files with 29 additions and 12 deletions
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8
gcc/ChangeLog
View File

@ -1,3 +1,11 @@
2010-10-06 Jan Hubicka <jh@suse.cz>
* ipa.c (cgraph_remove_unreachable_nodes): External references can always
be removed.
(cgraph_externally_visible_p): We can not bring local comdats that are known
to linker; fix handling of internal visibility.
(function_and_variable_visibility): Likewise.
2010-10-06 Eric Botcazou <ebotcazou@adacore.com>
PR rtl-optimization/45394

33
gcc/ipa.c
View File

@ -238,14 +238,19 @@ cgraph_remove_unreachable_nodes (bool before_inlining_p, FILE *file)
#endif
varpool_reset_queue ();
for (node = cgraph_nodes; node; node = node->next)
if ((!cgraph_can_remove_if_no_direct_calls_and_refs_p (node)
/* Keep around virtual functions for possible devirtualization. */
|| (!before_inlining_p
&& !node->global.inlined_to
&& DECL_VIRTUAL_P (node->decl)
&& (DECL_COMDAT (node->decl) || DECL_EXTERNAL (node->decl))))
&& ((!DECL_EXTERNAL (node->decl))
|| before_inlining_p))
if (!node->analyzed)
{
gcc_assert (!node->aux);
node->reachable = false;
}
else if ((!cgraph_can_remove_if_no_direct_calls_and_refs_p (node)
/* Keep around virtual functions for possible devirtualization. */
|| (!before_inlining_p
&& !node->global.inlined_to
&& DECL_VIRTUAL_P (node->decl)
&& (DECL_COMDAT (node->decl) || DECL_EXTERNAL (node->decl))))
&& ((!DECL_EXTERNAL (node->decl))
|| before_inlining_p))
{
gcc_assert (!node->global.inlined_to);
enqueue_cgraph_node (node, &first);
@ -592,8 +597,13 @@ cgraph_externally_visible_p (struct cgraph_node *node, bool whole_program, bool
if (aliased)
return true;
/* If linker counts on us, we must preserve the function. */
if (cgraph_used_from_object_file_p (node))
return true;
/* When doing link time optimizations, hidden symbols become local. */
if (in_lto_p && DECL_VISIBILITY (node->decl) == VISIBILITY_HIDDEN
if (in_lto_p
&& (DECL_VISIBILITY (node->decl) == VISIBILITY_HIDDEN
|| DECL_VISIBILITY (node->decl) == VISIBILITY_INTERNAL)
/* Be sure that node is defined in IR file, not in other object
file. In that case we don't set used_from_other_object_file. */
&& node->analyzed)
@ -621,8 +631,6 @@ cgraph_externally_visible_p (struct cgraph_node *node, bool whole_program, bool
return true;
}
}
if (cgraph_used_from_object_file_p (node))
return true;
if (DECL_PRESERVE_P (node->decl))
return true;
if (MAIN_NAME_P (DECL_NAME (node->decl)))
@ -794,7 +802,8 @@ function_and_variable_visibility (bool whole_program)
/* When doing linktime optimizations, all hidden symbols will
become local. */
&& (!in_lto_p
|| DECL_VISIBILITY (vnode->decl) != VISIBILITY_HIDDEN
|| (DECL_VISIBILITY (vnode->decl) != VISIBILITY_HIDDEN
&& DECL_VISIBILITY (vnode->decl) != VISIBILITY_INTERNAL)
/* We can get prevailing decision in other object file.
In this case we do not sed used_from_object_file. */
|| !vnode->finalized))