tree-ssa-dom.c (build_and_record_new_cond): Add optional parameter to record a condition that is false.

2015-07-02  Richard Biener  <rguenther@suse.de>

	* tree-ssa-dom.c (build_and_record_new_cond): Add optional
	parameter to record a condition that is false.
	(record_conditions): When recording an extra NE_EXPR that is
	true also record a EQ_EXPR that is false.

	* gcc.dg/tree-ssa/ssa-dom-cse-4.c: New testcase.

From-SVN: r225299