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

gcc:
	PR tree-optimization/63841
	* tree.c (initializer_zerop): A clobber does not zero initialize.

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

From-SVN: r217505