1 files changed, 64 insertions, 0 deletions
diff --git a/0084-MULL64-Disable-mull64-transformation-by-default.patch b/0084-MULL64-Disable-mull64-transformation-by-default.patch
new file mode 100644
index 0000000..66668b1
--- /dev/null
+++ b/0084-MULL64-Disable-mull64-transformation-by-default.patch
@@ -0,0 +1,64 @@
+From fb86109ebb10cdb82e1e3ffa37bb7e770fb7c066 Mon Sep 17 00:00:00 2001
+From: eastb233 <xiezhiheng@huawei.com>
+Date: Wed, 7 Dec 2022 09:43:15 +0800
+Subject: [PATCH] [MULL64] Disable mull64 transformation by default
+
+This commit disables mull64 transformation by default since
+it shows some runtime failure in workloads.
+---
+ gcc/match.pd                           | 2 +-
+ gcc/opts.c                             | 1 -
+ gcc/testsuite/g++.dg/tree-ssa/mull64.C | 2 +-
+ gcc/testsuite/gcc.dg/pr107190.c        | 2 +-
+ 4 files changed, 3 insertions(+), 4 deletions(-)
+
+diff --git a/gcc/match.pd b/gcc/match.pd
+index 433682afb..01f81b063 100644
+--- a/gcc/match.pd
++++ b/gcc/match.pd
+@@ -3393,7 +3393,7 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
+   (simplify
+    (cond @0 (op:s @1 integer_pow2p@2) @1)
+     /* powerof2cst */
+-   (if (INTEGRAL_TYPE_P (type))
++   (if (flag_merge_mull && INTEGRAL_TYPE_P (type))
+     (with {
+       tree shift = build_int_cst (integer_type_node, tree_log2 (@2));
+      }
+diff --git a/gcc/opts.c b/gcc/opts.c
+index 751965e46..f12b13599 100644
+--- a/gcc/opts.c
++++ b/gcc/opts.c
+@@ -511,7 +511,6 @@ static const struct default_options default_options_table[] =
+     { OPT_LEVELS_2_PLUS, OPT_fvect_cost_model_, NULL, VECT_COST_MODEL_CHEAP },
+     { OPT_LEVELS_2_PLUS, OPT_finline_functions, NULL, 1 },
+     { OPT_LEVELS_2_PLUS, OPT_ftree_loop_distribute_patterns, NULL, 1 },
+-    { OPT_LEVELS_2_PLUS, OPT_fmerge_mull, NULL, 1 },
+ 
+     /* -O2 and above optimizations, but not -Os or -Og.  */
+     { OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_falign_functions, NULL, 1 },
+diff --git a/gcc/testsuite/g++.dg/tree-ssa/mull64.C b/gcc/testsuite/g++.dg/tree-ssa/mull64.C
+index f61cf5e6f..cad891e62 100644
+--- a/gcc/testsuite/g++.dg/tree-ssa/mull64.C
++++ b/gcc/testsuite/g++.dg/tree-ssa/mull64.C
+@@ -1,5 +1,5 @@
+ /* { dg-do compile } */
+-/* { dg-options "-O2 -Wno-psabi -fdump-tree-forwprop1-details -fdump-tree-forwprop4-details" } */
++/* { dg-options "-O2 -fmerge-mull -Wno-psabi -fdump-tree-forwprop1-details -fdump-tree-forwprop4-details" } */
+ 
+ #  define BN_BITS4        32
+ #  define BN_MASK2        (0xffffffffffffffffL)
+diff --git a/gcc/testsuite/gcc.dg/pr107190.c b/gcc/testsuite/gcc.dg/pr107190.c
+index 235b2761a..d1e72e5df 100644
+--- a/gcc/testsuite/gcc.dg/pr107190.c
++++ b/gcc/testsuite/gcc.dg/pr107190.c
+@@ -1,5 +1,5 @@
+ /* { dg-do compile } */
+-/* { dg-options "-O2 -fexpensive-optimizations -fdump-tree-phiopt2-details" } */
++/* { dg-options "-O2 -fmerge-mull -fexpensive-optimizations -fdump-tree-phiopt2-details" } */
+ 
+ #  define BN_BITS4        32
+ #  define BN_MASK2        (0xffffffffffffffffL)
+-- 
+2.25.1
+