re PR middle-end/55430 (LRA miscompilation of ree.c)

re PR middle-end/55430 (LRA miscompilation of ree.c)

2012-11-22  Vladimir Makarov  <vmakarov@redhat.com>

	PR middle-end/55430
	* lra.c: Move #include "hard-reg-set.h" before #include "rtl.h".
	(new_insn_reg): Update biggest_mode.
	(collect_non_operand_hard_regs): Check eliminable regs too.
	(initialize_lra_reg_info_element): Initialize biggest_mode.
	(add_regs_to_insn_regno_info): Ignore non-allocatable
	non-eliminable hard regs.
	(lra.c): Move setting lra_no_alloc_regs before
	init_insn_recog_data.
	* lra-constraints.c (simplify_operand_subreg): Add a comment.
	(lra_constraints): Ignore equivalent memory of
	regs occuring in paradoxical subregs.
	* lra-lives.c (lra_create_live_ranges): Add a comment.

From-SVN: r193742