From b8c6a45ab7a0a6c8c7a6315f255312b32b5a8403 Mon Sep 17 00:00:00 2001 From: Tom de Vries Date: Wed, 28 May 2014 09:43:52 +0000 Subject: -fuse-caller-save - Support in lra 2014-05-28 Tom de Vries * lra-int.h (struct lra_reg): Add field actual_call_used_reg_set. * lra.c (initialize_lra_reg_info_element): Add init of actual_call_used_reg_set field. (lra): Call lra_create_live_ranges before lra_inheritance for -fuse-caller-save. * lra-assigns.c (lra_assign): Allow call_used_regs to cross calls for -fuse-caller-save. * lra-constraints.c (need_for_call_save_p): Use actual_call_used_reg_set instead of call_used_reg_set for -fuse-caller-save. * lra-lives.c (process_bb_lives): Calculate actual_call_used_reg_set. From-SVN: r211010 --- gcc/lra-constraints.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'gcc/lra-constraints.c') diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c index 2df841a..7eb9dbc 100644 --- a/gcc/lra-constraints.c +++ b/gcc/lra-constraints.c @@ -4605,7 +4605,10 @@ need_for_call_save_p (int regno) lra_assert (regno >= FIRST_PSEUDO_REGISTER && reg_renumber[regno] >= 0); return (usage_insns[regno].calls_num < calls_num && (overlaps_hard_reg_set_p - (call_used_reg_set, + ((flag_use_caller_save && + ! hard_reg_set_empty_p (lra_reg_info[regno].actual_call_used_reg_set)) + ? lra_reg_info[regno].actual_call_used_reg_set + : call_used_reg_set, PSEUDO_REGNO_MODE (regno), reg_renumber[regno]) || HARD_REGNO_CALL_PART_CLOBBERED (reg_renumber[regno], PSEUDO_REGNO_MODE (regno)))); -- cgit v1.1