re PR target/65647 (GCC won't stop when compile for armv6-m)

re PR target/65647 (GCC won't stop when compile for armv6-m)

2015-04-04  Vladimir Makarov  <vmakarov@redhat.com>

	PR target/65647
	* lra-int.h (LRA_MAX_REMATERIALIZATION_PASSES): New.  Add its
	value checking.
	(lra_rematerialization_iter): New.
	* lra.c (lra): Initialize lra_rematerialization_iter.
	Stop updating lra_constraint_new_regno_start after switching of
	inheritance and rematerialization.
	* lra-remat.c (lra_rematerialization_iter): New.
	(lra_remat): Add printing pass iteration.  Do rematerialization
	only first LRA_MAX_REMATERIALIZATION_PASSES iterations.

2015-04-04  Vladimir Makarov  <vmakarov@redhat.com>

	PR target/65647
	* gcc.target/arm/pr65647.c: New.

From-SVN: r221867