2017-01-26  Vladimir Makarov  <vmakarov@redhat.com>

	PR target/79131
	* lra-assigns.c (setup_live_pseudos_and_spill_after_risky): Take
	endianess for subregs into account.
	* lra-constraints.c (lra_constraints): Do risky transformations
	always on the first iteration.
	* lra-lives.c (check_pseudos_live_through_calls): Add arg
	last_call_used_reg_set.
	(process_bb_lives): Define and use last_call_used_reg_set.
	* lra.c (lra): Always continue after lra_constraints on the first
	iteration.

2017-01-26  Vladimir Makarov  <vmakarov@redhat.com>

	PR target/79131
	* gcc.target/arm/pr79131.c: New.

From-SVN: r244942