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ipa-cp.c (ipa_get_indirect_edge_target_1): Use can_refer; do not speculate to impossible targets.

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* ipa-cp.c (ipa_get_indirect_edge_target_1): Use can_refer; do not
	speculate to impossible targets.
	* ipa-prop.c (try_make_edge_direct_virtual_call): Likewise.

From-SVN: r231705
This commit is contained in:
Jan Hubicka 2015-12-16 18:26:20 +01:00 committed by Jan Hubicka
parent 8062bca66d
commit 2994ab20f1
3 changed files with 31 additions and 10 deletions
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6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2015-12-10 Jan Hubicka <hubicka@ucw.cz>
* ipa-cp.c (ipa_get_indirect_edge_target_1): Use can_refer; do not
speculate to impossible targets.
* ipa-prop.c (try_make_edge_direct_virtual_call): Likewise.
2015-12-16 Aditya Kumar <aditya.k7@samsung.com>
Sebastian Pop <s.pop@samsung.com>

17
gcc/ipa-cp.c
View File

@ -2077,15 +2077,22 @@ ipa_get_indirect_edge_target_1 (struct cgraph_edge *ie,
unsigned HOST_WIDE_INT offset;
if (vtable_pointer_value_to_vtable (t, &vtable, &offset))
{
bool can_refer;
target = gimple_get_virt_method_for_vtable (ie->indirect_info->otr_token,
vtable, offset);
if (target)
vtable, offset, &can_refer);
if (can_refer)
{
if ((TREE_CODE (TREE_TYPE (target)) == FUNCTION_TYPE
if (!target
|| (TREE_CODE (TREE_TYPE (target)) == FUNCTION_TYPE
&& DECL_FUNCTION_CODE (target) == BUILT_IN_UNREACHABLE)
|| !possible_polymorphic_call_target_p
(ie, cgraph_node::get (target)))
{
/* Do not speculate builtin_unreachable, it is stupid! */
if (ie->indirect_info->vptr_changed)
return NULL;
target = ipa_impossible_devirt_target (ie, target);
}
*speculative = ie->indirect_info->vptr_changed;
if (!*speculative)
return target;
@ -2163,7 +2170,11 @@ ipa_get_indirect_edge_target_1 (struct cgraph_edge *ie,
if (target && !possible_polymorphic_call_target_p (ie,
cgraph_node::get (target)))
{
if (*speculative)
return NULL;
target = ipa_impossible_devirt_target (ie, target);
}
return target;
}

10
gcc/ipa-prop.c
View File

@ -2898,11 +2898,13 @@ try_make_edge_direct_virtual_call (struct cgraph_edge *ie,
true);
if (t && vtable_pointer_value_to_vtable (t, &vtable, &offset))
{
bool can_refer;
t = gimple_get_virt_method_for_vtable (ie->indirect_info->otr_token,
vtable, offset);
if (t)
vtable, offset, &can_refer);
if (can_refer)
{
if ((TREE_CODE (TREE_TYPE (t)) == FUNCTION_TYPE
if (!t
|| (TREE_CODE (TREE_TYPE (t)) == FUNCTION_TYPE
&& DECL_FUNCTION_CODE (t) == BUILT_IN_UNREACHABLE)
|| !possible_polymorphic_call_target_p
(ie, cgraph_node::get (t)))
@ -2910,6 +2912,8 @@ try_make_edge_direct_virtual_call (struct cgraph_edge *ie,
/* Do not speculate builtin_unreachable, it is stupid! */
if (!ie->indirect_info->vptr_changed)
target = ipa_impossible_devirt_target (ie, target);
else
target = NULL;
}
else
{