From 7156e379a67fa47a5fb9ede1448c0d528dbda65b Mon Sep 17 00:00:00 2001 From: Mahesh Bodapati Date: Thu, 2 Mar 2017 19:02:31 +0530 Subject: [PATCH 36/54] [Patch,Microblaze]:reverting the cost check before propagating constants. --- gcc/cprop.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/gcc/cprop.c b/gcc/cprop.c index e4df509..deb706b 100644 --- a/gcc/cprop.c +++ b/gcc/cprop.c @@ -733,6 +733,7 @@ try_replace_reg (rtx from, rtx to, rtx_insn *insn) int success = 0; rtx set = single_set (insn); +#if 0 bool check_rtx_costs = true; bool speed = optimize_bb_for_speed_p (BLOCK_FOR_INSN (insn)); int old_cost = set ? set_rtx_cost (set, speed) : 0; @@ -744,6 +745,7 @@ try_replace_reg (rtx from, rtx to, rtx_insn *insn) && (GET_CODE (XEXP (note, 0)) == CONST || CONSTANT_P (XEXP (note, 0))))) check_rtx_costs = false; +#endif /* Usually we substitute easy stuff, so we won't copy everything. We however need to take care to not duplicate non-trivial CONST @@ -752,6 +754,7 @@ try_replace_reg (rtx from, rtx to, rtx_insn *insn) validate_replace_src_group (from, to, insn); +#if 0 /* If TO is a constant, check the cost of the set after propagation to the cost of the set before the propagation. If the cost is higher, then do not replace FROM with TO. */ @@ -764,6 +767,7 @@ try_replace_reg (rtx from, rtx to, rtx_insn *insn) return false; } +#endif if (num_changes_pending () && apply_change_group ()) success = 1; -- 2.7.4