2014-11-18  Teresa Johnson  <tejohnson@google.com>

	Backport from mainline and gcc-4_9 branch.

	2014-11-13  Teresa Johnson  <tejohnson@google.com>

	PR tree-optimization/63841
	* tree-ssa-strlen.c (strlen_optimize_stmt): Ignore clobbers.

	2014-11-13  Teresa Johnson  <tejohnson@google.com>

	PR tree-optimization/63841
	* testsuite/g++.dg/tree-ssa/pr63841.C: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_8-branch@217715 138bc75d-0d04-0410-961f-82ee72b054a4