diff options
Diffstat (limited to 'meta-xilinx/meta-xilinx-bsp/recipes-microblaze/gcc/gcc-8/0036-Patch-Microblaze-reverting-the-cost-check-before-pro.patch')
-rw-r--r-- | meta-xilinx/meta-xilinx-bsp/recipes-microblaze/gcc/gcc-8/0036-Patch-Microblaze-reverting-the-cost-check-before-pro.patch | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/meta-xilinx/meta-xilinx-bsp/recipes-microblaze/gcc/gcc-8/0036-Patch-Microblaze-reverting-the-cost-check-before-pro.patch b/meta-xilinx/meta-xilinx-bsp/recipes-microblaze/gcc/gcc-8/0036-Patch-Microblaze-reverting-the-cost-check-before-pro.patch new file mode 100644 index 0000000000..54ccd9a0c7 --- /dev/null +++ b/meta-xilinx/meta-xilinx-bsp/recipes-microblaze/gcc/gcc-8/0036-Patch-Microblaze-reverting-the-cost-check-before-pro.patch @@ -0,0 +1,49 @@ +From 7156e379a67fa47a5fb9ede1448c0d528dbda65b Mon Sep 17 00:00:00 2001 +From: Mahesh Bodapati <mbodapat@xilinx.com> +Date: Thu, 2 Mar 2017 19:02:31 +0530 +Subject: [PATCH 36/54] [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 + |