re PR debug/66691 (ICE on valid code at -O3 with -g enabled in simplify_subreg, at simplify-rtx.c:5744)

2015-06-30  Vladimir Makarov  <vmakarov@redhat.com>

	PR debug/66691
	* lra-int.h (lra_substitute_pseudo): Add a parameter.
	(lra_substitute_pseudo_within_insn): Ditto.
	* lra.c (lra_substitute_pseudo): Add a parameter.  Simplify subreg
	of constant.
	(lra_substitute_pseudo_within_insn): Add a parameter.  Transfer it
	to lra_substitute_pseudo.
	* lra-lives.c (process_bb_lives): Add an argument to
	lra_substitute_pseudo_within_insn call.
	* lra-constraints.c (inherit_reload_reg, split_reg): Add an
	argument to lra_substitute_pseudo and
	lra_substitute_pseudo_within_insn calls.
	(remove_inheritance_pseudos, undo_optional_reloads): Ditto.

2015-06-30  Vladimir Makarov  <vmakarov@redhat.com>

	PR debug/66691
	* gcc.target/i386/pr66691.c: New.

From-SVN: r225200