| From ac30efb4a5f5b6d289fdd27b268c2095d60dcb42 Mon Sep 17 00:00:00 2001 |
| From: Mahesh Bodapati <mbodapat@xilinx.com> |
| Date: Thu, 2 Mar 2017 19:02:31 +0530 |
| Subject: [PATCH 36/63] [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 65c0130..42bcc81 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 |
| |