http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54570
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |4.8.0
--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-09-13
15:15:31 UTC ---
We talked about disabling SCCVNs offset-based field VN here:
case COMPONENT_REF:
/* The field decl is enough to unambiguously specify the field,
a matching type is not necessary and a mismatching type
is always a spurious difference. */
temp.type = NULL_TREE;
temp.op0 = TREE_OPERAND (ref, 1);
temp.op1 = TREE_OPERAND (ref, 2);
{
tree this_offset = component_ref_field_offset (ref);
if (this_offset
...
thus keep temp.off == -1 or adjust the equality function.
--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-09-13
15:17:10 UTC ---
And introducing a global flag whether any __builtin_object_size calls where
in the code and not pessimize opts if not.
