[Bug tree-optimization/51491] ccp when converting from alloca should add a CLOBBER to right before __builtin_stack_restore

[vries at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51491

--- Comment #7 from vries at gcc dot gnu.org 2011-12-13 15:00:35 UTC ---
Created attachment 26070
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26070
update tentative patch

now testing on x86_64