2015-06-28  Chung-Lin Tang <cltang@codesourcery.com>
	    Sandra Loosemore <sandra@codesourcery.com>

	gcc/
	* regrename.h (regrename_do_replace): Change to return bool.
	* regrename.c (rename_chains): Check return value of
	regname_do_replace.
	(regrename_do_replace): Re-validate the modified insns and
	return bool status.
	* config/aarch64/cortex-a57-fma-steering.c (rename_single_chain):
	Update to match rename_chains changes.
	* config/c6x/c6x.c (try_rename_operands): Assert that
	regrename_do_replace returns true.

Co-Authored-By: Sandra Loosemore <sandra@codesourcery.com>

From-SVN: r225106