2012-08-07  Richard Guenther  <rguenther@suse.de>

	* tree-into-ssa.c (rewrite_stmt): Remove clobbers for variables
	we rewrite into SSA form.
	(rewrite_enter_block): Adjust.
	* gimple-iterator.c (gsi_replace): Also allow replacement with
	a stmt without a lhs.
	* tree-ssa-live.c (remove_unused_locals): Remove code handling
	clobbers of SSA names.
	* tree-nested.c (convert_local_reference_stmt): Remove clobbers
	for variables we access through the local chain.
	* tree-cfg.c (verify_gimple_assign_single): Verify clobbers
	clobber full decls only.

From-SVN: r190200