re PR tree-optimization/62238 (ICE with LTO on valid code on x86_64-linux-gnu in verify_ssa (in 64-bit mode))

2014-11-26  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/62238
	* tree-predcom.c (ref_at_iteration): Unshare the expression
	before gimplifying it.
	(prepare_initializers_chain): Discard unused seq.

	* gcc.dg/torture/pr62238.c: New testcase.

From-SVN: r218074