Backported from mainline
	2014-12-12  Jakub Jelinek  <jakub@redhat.com>

	PR tree-optimization/64269
	* tree-ssa-forwprop.c (simplify_builtin_call): Bail out if
	len2 or diff are too large.

	* gcc.c-torture/compile/pr64269.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_8-branch@218704 138bc75d-0d04-0410-961f-82ee72b054a4