[InstCombine] Unfold masked merge with constant mask

Summary:
As discussed in D45733, we want to do this in InstCombine.

https://rise4fun.com/Alive/LGk

Reviewers: spatel, craig.topper

Reviewed By: spatel

Subscribers: chandlerc, xbolva00, llvm-commits

Differential Revision: https://reviews.llvm.org/D45867

llvm-svn: 331205

2 files changed, 65 insertions, 69 deletions

diff --git a/llvm/test/Transforms/InstCombine/unfold-masked-merge-with-const-mask-scalar.ll b/llvm/test/Transforms/InstCombine/unfold-masked-merge-with-const-mask-scalar.ll
index d8509eca4c4..b3bc74d3cfe 100644
--- a/llvm/test/Transforms/InstCombine/unfold-masked-merge-with-const-mask-scalar.ll
+++ b/llvm/test/Transforms/InstCombine/unfold-masked-merge-with-const-mask-scalar.ll
@@ -8,9 +8,9 @@
 
 define i4 @scalar0 (i4 %x, i4 %y) {
 ; CHECK-LABEL: @scalar0(
-; CHECK-NEXT:    [[N0:%.*]] = xor i4 [[X:%.*]], [[Y:%.*]]
-; CHECK-NEXT:    [[N1:%.*]] = and i4 [[N0]], 1
-; CHECK-NEXT:    [[R:%.*]] = xor i4 [[N1]], [[Y]]
+; CHECK-NEXT:    [[TMP1:%.*]] = and i4 [[X:%.*]], 1
+; CHECK-NEXT:    [[TMP2:%.*]] = and i4 [[Y:%.*]], -2
+; CHECK-NEXT:    [[R:%.*]] = or i4 [[TMP1]], [[TMP2]]
 ; CHECK-NEXT:    ret i4 [[R]]
 ;
   %n0 = xor i4 %x, %y
@@ -21,9 +21,9 @@ define i4 @scalar0 (i4 %x, i4 %y) {
 
 define i4 @scalar1 (i4 %x, i4 %y) {
 ; CHECK-LABEL: @scalar1(
-; CHECK-NEXT:    [[N0:%.*]] = xor i4 [[X:%.*]], [[Y:%.*]]
-; CHECK-NEXT:    [[N1:%.*]] = and i4 [[N0]], -2
-; CHECK-NEXT:    [[R:%.*]] = xor i4 [[N1]], [[Y]]
+; CHECK-NEXT:    [[TMP1:%.*]] = and i4 [[X:%.*]], -2
+; CHECK-NEXT:    [[TMP2:%.*]] = and i4 [[Y:%.*]], 1
+; CHECK-NEXT:    [[R:%.*]] = or i4 [[TMP1]], [[TMP2]]
 ; CHECK-NEXT:    ret i4 [[R]]
 ;
   %n0 = xor i4 %x, %y
@@ -91,9 +91,9 @@ declare i4 @gen4()
 
 define i4 @c_1_0_0 (i4 %x, i4 %y) {
 ; CHECK-LABEL: @c_1_0_0(
-; CHECK-NEXT:    [[N0:%.*]] = xor i4 [[Y:%.*]], [[X:%.*]]
-; CHECK-NEXT:    [[N1:%.*]] = and i4 [[N0]], -2
-; CHECK-NEXT:    [[R:%.*]] = xor i4 [[N1]], [[Y]]
+; CHECK-NEXT:    [[TMP1:%.*]] = and i4 [[X:%.*]], -2
+; CHECK-NEXT:    [[TMP2:%.*]] = and i4 [[Y:%.*]], 1
+; CHECK-NEXT:    [[R:%.*]] = or i4 [[TMP1]], [[TMP2]]
 ; CHECK-NEXT:    ret i4 [[R]]
 ;
   %n0 = xor i4 %y, %x ; swapped order
@@ -104,9 +104,9 @@ define i4 @c_1_0_0 (i4 %x, i4 %y) {
 
 define i4 @c_0_1_0 (i4 %x, i4 %y) {
 ; CHECK-LABEL: @c_0_1_0(
-; CHECK-NEXT:    [[N0:%.*]] = xor i4 [[X:%.*]], [[Y:%.*]]
-; CHECK-NEXT:    [[N1:%.*]] = and i4 [[N0]], -2
-; CHECK-NEXT:    [[R:%.*]] = xor i4 [[N1]], [[X]]
+; CHECK-NEXT:    [[TMP1:%.*]] = and i4 [[Y:%.*]], -2
+; CHECK-NEXT:    [[TMP2:%.*]] = and i4 [[X:%.*]], 1
+; CHECK-NEXT:    [[R:%.*]] = or i4 [[TMP1]], [[TMP2]]
 ; CHECK-NEXT:    ret i4 [[R]]
 ;
   %n0 = xor i4 %x, %y
@@ -119,9 +119,9 @@ define i4 @c_0_0_1 () {
 ; CHECK-LABEL: @c_0_0_1(
 ; CHECK-NEXT:    [[X:%.*]] = call i4 @gen4()
 ; CHECK-NEXT:    [[Y:%.*]] = call i4 @gen4()
-; CHECK-NEXT:    [[N0:%.*]] = xor i4 [[X]], [[Y]]
-; CHECK-NEXT:    [[N1:%.*]] = and i4 [[N0]], -2
-; CHECK-NEXT:    [[R:%.*]] = xor i4 [[Y]], [[N1]]
+; CHECK-NEXT:    [[TMP1:%.*]] = and i4 [[X]], -2
+; CHECK-NEXT:    [[TMP2:%.*]] = and i4 [[Y]], 1
+; CHECK-NEXT:    [[R:%.*]] = or i4 [[TMP1]], [[TMP2]]
 ; CHECK-NEXT:    ret i4 [[R]]
 ;
   %x  = call i4 @gen4()
@@ -134,9 +134,9 @@ define i4 @c_0_0_1 () {
 
 define i4 @c_1_1_0 (i4 %x, i4 %y) {
 ; CHECK-LABEL: @c_1_1_0(
-; CHECK-NEXT:    [[N0:%.*]] = xor i4 [[Y:%.*]], [[X:%.*]]
-; CHECK-NEXT:    [[N1:%.*]] = and i4 [[N0]], -2
-; CHECK-NEXT:    [[R:%.*]] = xor i4 [[N1]], [[X]]
+; CHECK-NEXT:    [[TMP1:%.*]] = and i4 [[Y:%.*]], -2
+; CHECK-NEXT:    [[TMP2:%.*]] = and i4 [[X:%.*]], 1
+; CHECK-NEXT:    [[R:%.*]] = or i4 [[TMP1]], [[TMP2]]
 ; CHECK-NEXT:    ret i4 [[R]]
 ;
   %n0 = xor i4 %y, %x ; swapped order
@@ -148,9 +148,9 @@ define i4 @c_1_1_0 (i4 %x, i4 %y) {
 define i4 @c_1_0_1 (i4 %x) {
 ; CHECK-LABEL: @c_1_0_1(
 ; CHECK-NEXT:    [[Y:%.*]] = call i4 @gen4()
-; CHECK-NEXT:    [[N0:%.*]] = xor i4 [[Y]], [[X:%.*]]
-; CHECK-NEXT:    [[N1:%.*]] = and i4 [[N0]], -2
-; CHECK-NEXT:    [[R:%.*]] = xor i4 [[Y]], [[N1]]
+; CHECK-NEXT:    [[TMP1:%.*]] = and i4 [[X:%.*]], -2
+; CHECK-NEXT:    [[TMP2:%.*]] = and i4 [[Y]], 1
+; CHECK-NEXT:    [[R:%.*]] = or i4 [[TMP1]], [[TMP2]]
 ; CHECK-NEXT:    ret i4 [[R]]
 ;
   %y  = call i4 @gen4()
@@ -163,9 +163,9 @@ define i4 @c_1_0_1 (i4 %x) {
 define i4 @c_0_1_1 (i4 %y) {
 ; CHECK-LABEL: @c_0_1_1(
 ; CHECK-NEXT:    [[X:%.*]] = call i4 @gen4()
-; CHECK-NEXT:    [[N0:%.*]] = xor i4 [[X]], [[Y:%.*]]
-; CHECK-NEXT:    [[N1:%.*]] = and i4 [[N0]], -2
-; CHECK-NEXT:    [[R:%.*]] = xor i4 [[X]], [[N1]]
+; CHECK-NEXT:    [[TMP1:%.*]] = and i4 [[Y:%.*]], -2
+; CHECK-NEXT:    [[TMP2:%.*]] = and i4 [[X]], 1
+; CHECK-NEXT:    [[R:%.*]] = or i4 [[TMP1]], [[TMP2]]
 ; CHECK-NEXT:    ret i4 [[R]]
 ;
   %x  = call i4 @gen4()
@@ -179,9 +179,9 @@ define i4 @c_1_1_1 () {
 ; CHECK-LABEL: @c_1_1_1(
 ; CHECK-NEXT:    [[X:%.*]] = call i4 @gen4()
 ; CHECK-NEXT:    [[Y:%.*]] = call i4 @gen4()
-; CHECK-NEXT:    [[N0:%.*]] = xor i4 [[Y]], [[X]]
-; CHECK-NEXT:    [[N1:%.*]] = and i4 [[N0]], -2
-; CHECK-NEXT:    [[R:%.*]] = xor i4 [[X]], [[N1]]
+; CHECK-NEXT:    [[TMP1:%.*]] = and i4 [[Y]], -2
+; CHECK-NEXT:    [[TMP2:%.*]] = and i4 [[X]], 1
+; CHECK-NEXT:    [[R:%.*]] = or i4 [[TMP1]], [[TMP2]]
 ; CHECK-NEXT:    ret i4 [[R]]
 ;
   %x  = call i4 @gen4()
diff --git a/llvm/test/Transforms/InstCombine/unfold-masked-merge-with-const-mask-vector.ll b/llvm/test/Transforms/InstCombine/unfold-masked-merge-with-const-mask-vector.ll
index 56a5032eff6..f87b52b9743 100644
--- a/llvm/test/Transforms/InstCombine/unfold-masked-merge-with-const-mask-vector.ll
+++ b/llvm/test/Transforms/InstCombine/unfold-masked-merge-with-const-mask-vector.ll
@@ -8,9 +8,9 @@
 
 define <2 x i4> @splat (<2 x i4> %x, <2 x i4> %y) {
 ; CHECK-LABEL: @splat(
-; CHECK-NEXT:    [[N0:%.*]] = xor <2 x i4> [[X:%.*]], [[Y:%.*]]
-; CHECK-NEXT:    [[N1:%.*]] = and <2 x i4> [[N0]], <i4 -2, i4 -2>
-; CHECK-NEXT:    [[R:%.*]] = xor <2 x i4> [[N1]], [[Y]]
+; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i4> [[X:%.*]], <i4 -2, i4 -2>
+; CHECK-NEXT:    [[TMP2:%.*]] = and <2 x i4> [[Y:%.*]], <i4 1, i4 1>
+; CHECK-NEXT:    [[R:%.*]] = or <2 x i4> [[TMP1]], [[TMP2]]
 ; CHECK-NEXT:    ret <2 x i4> [[R]]
 ;
   %n0 = xor <2 x i4> %x, %y
@@ -21,9 +21,9 @@ define <2 x i4> @splat (<2 x i4> %x, <2 x i4> %y) {
 
 define <3 x i4> @splat_undef (<3 x i4> %x, <3 x i4> %y) {
 ; CHECK-LABEL: @splat_undef(
-; CHECK-NEXT:    [[N0:%.*]] = xor <3 x i4> [[X:%.*]], [[Y:%.*]]
-; CHECK-NEXT:    [[N1:%.*]] = and <3 x i4> [[N0]], <i4 -2, i4 undef, i4 -2>
-; CHECK-NEXT:    [[R:%.*]] = xor <3 x i4> [[N1]], [[Y]]
+; CHECK-NEXT:    [[TMP1:%.*]] = and <3 x i4> [[X:%.*]], <i4 -2, i4 undef, i4 -2>
+; CHECK-NEXT:    [[TMP2:%.*]] = and <3 x i4> [[Y:%.*]], <i4 1, i4 undef, i4 1>
+; CHECK-NEXT:    [[R:%.*]] = or <3 x i4> [[TMP1]], [[TMP2]]
 ; CHECK-NEXT:    ret <3 x i4> [[R]]
 ;
   %n0 = xor <3 x i4> %x, %y
@@ -34,9 +34,9 @@ define <3 x i4> @splat_undef (<3 x i4> %x, <3 x i4> %y) {
 
 define <2 x i4> @nonsplat (<2 x i4> %x, <2 x i4> %y) {
 ; CHECK-LABEL: @nonsplat(
-; CHECK-NEXT:    [[N0:%.*]] = xor <2 x i4> [[X:%.*]], [[Y:%.*]]
-; CHECK-NEXT:    [[N1:%.*]] = and <2 x i4> [[N0]], <i4 -2, i4 1>
-; CHECK-NEXT:    [[R:%.*]] = xor <2 x i4> [[N1]], [[Y]]
+; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i4> [[X:%.*]], <i4 -2, i4 1>
+; CHECK-NEXT:    [[TMP2:%.*]] = and <2 x i4> [[Y:%.*]], <i4 1, i4 -2>
+; CHECK-NEXT:    [[R:%.*]] = or <2 x i4> [[TMP1]], [[TMP2]]
 ; CHECK-NEXT:    ret <2 x i4> [[R]]
 ;
   %n0 = xor <2 x i4> %x, %y
@@ -73,9 +73,8 @@ define <2 x i4> @in_constant_varx_14(<2 x i4> %x, <2 x i4> %mask) {
 
 define <2 x i4> @in_constant_varx_14_nonsplat(<2 x i4> %x, <2 x i4> %mask) {
 ; CHECK-LABEL: @in_constant_varx_14_nonsplat(
-; CHECK-NEXT:    [[N0:%.*]] = xor <2 x i4> [[X:%.*]], <i4 -2, i4 7>
-; CHECK-NEXT:    [[N1:%.*]] = and <2 x i4> [[N0]], <i4 1, i4 1>
-; CHECK-NEXT:    [[R:%.*]] = xor <2 x i4> [[N1]], <i4 -2, i4 7>
+; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i4> [[X:%.*]], <i4 1, i4 1>
+; CHECK-NEXT:    [[R:%.*]] = or <2 x i4> [[TMP1]], <i4 -2, i4 6>
 ; CHECK-NEXT:    ret <2 x i4> [[R]]
 ;
   %n0 = xor <2 x i4> %x, <i4 14, i4 7> ; %x
@@ -86,9 +85,8 @@ define <2 x i4> @in_constant_varx_14_nonsplat(<2 x i4> %x, <2 x i4> %mask) {
 
 define <3 x i4> @in_constant_varx_14_undef(<3 x i4> %x, <3 x i4> %mask) {
 ; CHECK-LABEL: @in_constant_varx_14_undef(
-; CHECK-NEXT:    [[N0:%.*]] = xor <3 x i4> [[X:%.*]], <i4 -2, i4 undef, i4 7>
-; CHECK-NEXT:    [[N1:%.*]] = and <3 x i4> [[N0]], <i4 1, i4 undef, i4 1>
-; CHECK-NEXT:    [[R:%.*]] = xor <3 x i4> [[N1]], <i4 -2, i4 undef, i4 7>
+; CHECK-NEXT:    [[TMP1:%.*]] = and <3 x i4> [[X:%.*]], <i4 1, i4 undef, i4 1>
+; CHECK-NEXT:    [[R:%.*]] = or <3 x i4> [[TMP1]], <i4 -2, i4 undef, i4 6>
 ; CHECK-NEXT:    ret <3 x i4> [[R]]
 ;
   %n0 = xor <3 x i4> %x, <i4 14, i4 undef, i4 7> ; %x
@@ -123,9 +121,8 @@ define <2 x i4> @in_constant_14_vary(<2 x i4> %y, <2 x i4> %mask) {
 
 define <2 x i4> @in_constant_14_vary_nonsplat(<2 x i4> %y, <2 x i4> %mask) {
 ; CHECK-LABEL: @in_constant_14_vary_nonsplat(
-; CHECK-NEXT:    [[N0:%.*]] = xor <2 x i4> [[Y:%.*]], <i4 -2, i4 7>
-; CHECK-NEXT:    [[N1:%.*]] = and <2 x i4> [[N0]], <i4 1, i4 1>
-; CHECK-NEXT:    [[R:%.*]] = xor <2 x i4> [[N1]], [[Y]]
+; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i4> [[Y:%.*]], <i4 -2, i4 -2>
+; CHECK-NEXT:    [[R:%.*]] = or <2 x i4> [[TMP1]], <i4 0, i4 1>
 ; CHECK-NEXT:    ret <2 x i4> [[R]]
 ;
   %n0 = xor <2 x i4> %y, <i4 14, i4 7> ; %x
@@ -136,9 +133,8 @@ define <2 x i4> @in_constant_14_vary_nonsplat(<2 x i4> %y, <2 x i4> %mask) {
 
 define <3 x i4> @in_constant_14_vary_undef(<3 x i4> %y, <3 x i4> %mask) {
 ; CHECK-LABEL: @in_constant_14_vary_undef(
-; CHECK-NEXT:    [[N0:%.*]] = xor <3 x i4> [[Y:%.*]], <i4 -2, i4 undef, i4 7>
-; CHECK-NEXT:    [[N1:%.*]] = and <3 x i4> [[N0]], <i4 1, i4 undef, i4 1>
-; CHECK-NEXT:    [[R:%.*]] = xor <3 x i4> [[N1]], [[Y]]
+; CHECK-NEXT:    [[TMP1:%.*]] = and <3 x i4> [[Y:%.*]], <i4 -2, i4 undef, i4 -2>
+; CHECK-NEXT:    [[R:%.*]] = or <3 x i4> [[TMP1]], <i4 0, i4 undef, i4 1>
 ; CHECK-NEXT:    ret <3 x i4> [[R]]
 ;
   %n0 = xor <3 x i4> %y, <i4 14, i4 undef, i4 7> ; %x
@@ -156,9 +152,9 @@ declare <2 x i4> @gen4()
 
 define <2 x i4> @c_1_0_0 (<2 x i4> %x, <2 x i4> %y) {
 ; CHECK-LABEL: @c_1_0_0(
-; CHECK-NEXT:    [[N0:%.*]] = xor <2 x i4> [[Y:%.*]], [[X:%.*]]
-; CHECK-NEXT:    [[N1:%.*]] = and <2 x i4> [[N0]], <i4 -2, i4 -2>
-; CHECK-NEXT:    [[R:%.*]] = xor <2 x i4> [[N1]], [[Y]]
+; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i4> [[X:%.*]], <i4 -2, i4 -2>
+; CHECK-NEXT:    [[TMP2:%.*]] = and <2 x i4> [[Y:%.*]], <i4 1, i4 1>
+; CHECK-NEXT:    [[R:%.*]] = or <2 x i4> [[TMP1]], [[TMP2]]
 ; CHECK-NEXT:    ret <2 x i4> [[R]]
 ;
   %n0 = xor <2 x i4> %y, %x ; swapped order
@@ -169,9 +165,9 @@ define <2 x i4> @c_1_0_0 (<2 x i4> %x, <2 x i4> %y) {
 
 define <2 x i4> @c_0_1_0 (<2 x i4> %x, <2 x i4> %y) {
 ; CHECK-LABEL: @c_0_1_0(
-; CHECK-NEXT:    [[N0:%.*]] = xor <2 x i4> [[X:%.*]], [[Y:%.*]]
-; CHECK-NEXT:    [[N1:%.*]] = and <2 x i4> [[N0]], <i4 -2, i4 -2>
-; CHECK-NEXT:    [[R:%.*]] = xor <2 x i4> [[N1]], [[X]]
+; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i4> [[Y:%.*]], <i4 -2, i4 -2>
+; CHECK-NEXT:    [[TMP2:%.*]] = and <2 x i4> [[X:%.*]], <i4 1, i4 1>
+; CHECK-NEXT:    [[R:%.*]] = or <2 x i4> [[TMP1]], [[TMP2]]
 ; CHECK-NEXT:    ret <2 x i4> [[R]]
 ;
   %n0 = xor <2 x i4> %x, %y
@@ -184,9 +180,9 @@ define <2 x i4> @c_0_0_1 () {
 ; CHECK-LABEL: @c_0_0_1(
 ; CHECK-NEXT:    [[X:%.*]] = call <2 x i4> @gen4()
 ; CHECK-NEXT:    [[Y:%.*]] = call <2 x i4> @gen4()
-; CHECK-NEXT:    [[N0:%.*]] = xor <2 x i4> [[X]], [[Y]]
-; CHECK-NEXT:    [[N1:%.*]] = and <2 x i4> [[N0]], <i4 -2, i4 -2>
-; CHECK-NEXT:    [[R:%.*]] = xor <2 x i4> [[Y]], [[N1]]
+; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i4> [[X]], <i4 -2, i4 -2>
+; CHECK-NEXT:    [[TMP2:%.*]] = and <2 x i4> [[Y]], <i4 1, i4 1>
+; CHECK-NEXT:    [[R:%.*]] = or <2 x i4> [[TMP1]], [[TMP2]]
 ; CHECK-NEXT:    ret <2 x i4> [[R]]
 ;
   %x  = call <2 x i4> @gen4()
@@ -199,9 +195,9 @@ define <2 x i4> @c_0_0_1 () {
 
 define <2 x i4> @c_1_1_0 (<2 x i4> %x, <2 x i4> %y) {
 ; CHECK-LABEL: @c_1_1_0(
-; CHECK-NEXT:    [[N0:%.*]] = xor <2 x i4> [[Y:%.*]], [[X:%.*]]
-; CHECK-NEXT:    [[N1:%.*]] = and <2 x i4> [[N0]], <i4 -2, i4 -2>
-; CHECK-NEXT:    [[R:%.*]] = xor <2 x i4> [[N1]], [[X]]
+; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i4> [[Y:%.*]], <i4 -2, i4 -2>
+; CHECK-NEXT:    [[TMP2:%.*]] = and <2 x i4> [[X:%.*]], <i4 1, i4 1>
+; CHECK-NEXT:    [[R:%.*]] = or <2 x i4> [[TMP1]], [[TMP2]]
 ; CHECK-NEXT:    ret <2 x i4> [[R]]
 ;
   %n0 = xor <2 x i4> %y, %x ; swapped order
@@ -213,9 +209,9 @@ define <2 x i4> @c_1_1_0 (<2 x i4> %x, <2 x i4> %y) {
 define <2 x i4> @c_1_0_1 (<2 x i4> %x) {
 ; CHECK-LABEL: @c_1_0_1(
 ; CHECK-NEXT:    [[Y:%.*]] = call <2 x i4> @gen4()
-; CHECK-NEXT:    [[N0:%.*]] = xor <2 x i4> [[Y]], [[X:%.*]]
-; CHECK-NEXT:    [[N1:%.*]] = and <2 x i4> [[N0]], <i4 -2, i4 -2>
-; CHECK-NEXT:    [[R:%.*]] = xor <2 x i4> [[Y]], [[N1]]
+; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i4> [[X:%.*]], <i4 -2, i4 -2>
+; CHECK-NEXT:    [[TMP2:%.*]] = and <2 x i4> [[Y]], <i4 1, i4 1>
+; CHECK-NEXT:    [[R:%.*]] = or <2 x i4> [[TMP1]], [[TMP2]]
 ; CHECK-NEXT:    ret <2 x i4> [[R]]
 ;
   %y  = call <2 x i4> @gen4()
@@ -228,9 +224,9 @@ define <2 x i4> @c_1_0_1 (<2 x i4> %x) {
 define <2 x i4> @c_0_1_1 (<2 x i4> %y) {
 ; CHECK-LABEL: @c_0_1_1(
 ; CHECK-NEXT:    [[X:%.*]] = call <2 x i4> @gen4()
-; CHECK-NEXT:    [[N0:%.*]] = xor <2 x i4> [[X]], [[Y:%.*]]
-; CHECK-NEXT:    [[N1:%.*]] = and <2 x i4> [[N0]], <i4 -2, i4 -2>
-; CHECK-NEXT:    [[R:%.*]] = xor <2 x i4> [[X]], [[N1]]
+; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i4> [[Y:%.*]], <i4 -2, i4 -2>
+; CHECK-NEXT:    [[TMP2:%.*]] = and <2 x i4> [[X]], <i4 1, i4 1>
+; CHECK-NEXT:    [[R:%.*]] = or <2 x i4> [[TMP1]], [[TMP2]]
 ; CHECK-NEXT:    ret <2 x i4> [[R]]
 ;
   %x  = call <2 x i4> @gen4()
@@ -244,9 +240,9 @@ define <2 x i4> @c_1_1_1 () {
 ; CHECK-LABEL: @c_1_1_1(
 ; CHECK-NEXT:    [[X:%.*]] = call <2 x i4> @gen4()
 ; CHECK-NEXT:    [[Y:%.*]] = call <2 x i4> @gen4()
-; CHECK-NEXT:    [[N0:%.*]] = xor <2 x i4> [[Y]], [[X]]
-; CHECK-NEXT:    [[N1:%.*]] = and <2 x i4> [[N0]], <i4 -2, i4 -2>
-; CHECK-NEXT:    [[R:%.*]] = xor <2 x i4> [[X]], [[N1]]
+; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i4> [[Y]], <i4 -2, i4 -2>
+; CHECK-NEXT:    [[TMP2:%.*]] = and <2 x i4> [[X]], <i4 1, i4 1>
+; CHECK-NEXT:    [[R:%.*]] = or <2 x i4> [[TMP1]], [[TMP2]]
 ; CHECK-NEXT:    ret <2 x i4> [[R]]
 ;
   %x  = call <2 x i4> @gen4()