[InstCombine] move/add tests for xor-of-icmps (PR36682); NFC

llvm-svn: 328109

2 files changed, 128 insertions, 21 deletions

diff --git a/llvm/test/Transforms/InstCombine/xor-icmps.ll b/llvm/test/Transforms/InstCombine/xor-icmps.ll
new file mode 100644
index 00000000000..834e9131a80
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/xor-icmps.ll
@@ -0,0 +1,128 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -instcombine -S | FileCheck %s
+
+define i1 @eq_zero(i4 %x, i4 %y) {
+; CHECK-LABEL: @eq_zero(
+; CHECK-NEXT:    [[I0:%.*]] = icmp eq i4 [[X:%.*]], 0
+; CHECK-NEXT:    [[I1:%.*]] = icmp eq i4 [[Y:%.*]], 0
+; CHECK-NEXT:    [[R:%.*]] = xor i1 [[I0]], [[I1]]
+; CHECK-NEXT:    ret i1 [[R]]
+;
+  %i0 = icmp eq i4 %x, 0
+  %i1 = icmp eq i4 %y, 0
+  %r = xor i1 %i0, %i1
+  ret i1 %r
+}
+
+define i1 @ne_zero(i4 %x, i4 %y) {
+; CHECK-LABEL: @ne_zero(
+; CHECK-NEXT:    [[I0:%.*]] = icmp ne i4 [[X:%.*]], 0
+; CHECK-NEXT:    [[I1:%.*]] = icmp ne i4 [[Y:%.*]], 0
+; CHECK-NEXT:    [[R:%.*]] = xor i1 [[I0]], [[I1]]
+; CHECK-NEXT:    ret i1 [[R]]
+;
+  %i0 = icmp ne i4 %x, 0
+  %i1 = icmp ne i4 %y, 0
+  %r = xor i1 %i0, %i1
+  ret i1 %r
+}
+
+define i1 @eq_ne_zero(i4 %x, i4 %y) {
+; CHECK-LABEL: @eq_ne_zero(
+; CHECK-NEXT:    [[I0:%.*]] = icmp eq i4 [[X:%.*]], 0
+; CHECK-NEXT:    [[I1:%.*]] = icmp ne i4 [[Y:%.*]], 0
+; CHECK-NEXT:    [[R:%.*]] = xor i1 [[I0]], [[I1]]
+; CHECK-NEXT:    ret i1 [[R]]
+;
+  %i0 = icmp eq i4 %x, 0
+  %i1 = icmp ne i4 %y, 0
+  %r = xor i1 %i0, %i1
+  ret i1 %r
+}
+
+define i1 @slt_zero(i4 %x, i4 %y) {
+; CHECK-LABEL: @slt_zero(
+; CHECK-NEXT:    [[I0:%.*]] = icmp slt i4 [[X:%.*]], 0
+; CHECK-NEXT:    [[I1:%.*]] = icmp slt i4 [[Y:%.*]], 0
+; CHECK-NEXT:    [[R:%.*]] = xor i1 [[I0]], [[I1]]
+; CHECK-NEXT:    ret i1 [[R]]
+;
+  %i0 = icmp slt i4 %x, 0
+  %i1 = icmp slt i4 %y, 0
+  %r = xor i1 %i0, %i1
+  ret i1 %r
+}
+
+define i1 @sgt_zero(i4 %x, i4 %y) {
+; CHECK-LABEL: @sgt_zero(
+; CHECK-NEXT:    [[I0:%.*]] = icmp sgt i4 [[X:%.*]], 0
+; CHECK-NEXT:    [[I1:%.*]] = icmp sgt i4 [[Y:%.*]], 0
+; CHECK-NEXT:    [[R:%.*]] = xor i1 [[I0]], [[I1]]
+; CHECK-NEXT:    ret i1 [[R]]
+;
+  %i0 = icmp sgt i4 %x, 0
+  %i1 = icmp sgt i4 %y, 0
+  %r = xor i1 %i0, %i1
+  ret i1 %r
+}
+
+define i1 @sgt_minus1(i4 %x, i4 %y) {
+; CHECK-LABEL: @sgt_minus1(
+; CHECK-NEXT:    [[I0:%.*]] = icmp sgt i4 [[X:%.*]], -1
+; CHECK-NEXT:    [[I1:%.*]] = icmp sgt i4 [[Y:%.*]], -1
+; CHECK-NEXT:    [[R:%.*]] = xor i1 [[I0]], [[I1]]
+; CHECK-NEXT:    ret i1 [[R]]
+;
+  %i0 = icmp sgt i4 %x, -1
+  %i1 = icmp sgt i4 %y, -1
+  %r = xor i1 %i0, %i1
+  ret i1 %r
+}
+
+define i1 @slt_zero_sgt_minus1(i4 %x, i4 %y) {
+; CHECK-LABEL: @slt_zero_sgt_minus1(
+; CHECK-NEXT:    [[I0:%.*]] = icmp slt i4 [[X:%.*]], 0
+; CHECK-NEXT:    [[I1:%.*]] = icmp sgt i4 [[Y:%.*]], -1
+; CHECK-NEXT:    [[R:%.*]] = xor i1 [[I0]], [[I1]]
+; CHECK-NEXT:    ret i1 [[R]]
+;
+  %i0 = icmp slt i4 %x, 0
+  %i1 = icmp sgt i4 %y, -1
+  %r = xor i1 %i0, %i1
+  ret i1 %r
+}
+
+define <2 x i1> @sgt_minus1_slt_zero_sgt(<2 x i4> %x, <2 x i4> %y) {
+; CHECK-LABEL: @sgt_minus1_slt_zero_sgt(
+; CHECK-NEXT:    [[I1:%.*]] = icmp sgt <2 x i4> [[X:%.*]], <i4 -1, i4 -1>
+; CHECK-NEXT:    [[I0:%.*]] = icmp slt <2 x i4> [[Y:%.*]], zeroinitializer
+; CHECK-NEXT:    [[R:%.*]] = xor <2 x i1> [[I0]], [[I1]]
+; CHECK-NEXT:    ret <2 x i1> [[R]]
+;
+  %i1 = icmp sgt <2 x i4> %x, <i4 -1, i4 -1>
+  %i0 = icmp slt <2 x i4> %y, zeroinitializer
+  %r = xor <2 x i1> %i0, %i1
+  ret <2 x i1> %r
+}
+
+define i1 @test13(i8 %A, i8 %B) {
+; CHECK-LABEL: @test13(
+; CHECK-NEXT:    [[TMP1:%.*]] = icmp ne i8 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT:    ret i1 [[TMP1]]
+;
+  %C = icmp ult i8 %A, %B
+  %D = icmp ugt i8 %A, %B
+  %E = xor i1 %C, %D
+  ret i1 %E
+}
+
+define i1 @test14(i8 %A, i8 %B) {
+; CHECK-LABEL: @test14(
+; CHECK-NEXT:    ret i1 true
+;
+  %C = icmp eq i8 %A, %B
+  %D = icmp ne i8 %B, %A
+  %E = xor i1 %C, %D
+  ret i1 %E
+}
+
diff --git a/llvm/test/Transforms/InstCombine/xor.ll b/llvm/test/Transforms/InstCombine/xor.ll
index a26a089be62..fcfab54f750 100644
--- a/llvm/test/Transforms/InstCombine/xor.ll
+++ b/llvm/test/Transforms/InstCombine/xor.ll
@@ -157,27 +157,6 @@ define <2 x i1> @test12vec(<2 x i8> %a) {
   ret <2 x i1> %c
 }
 
-define i1 @test13(i8 %A, i8 %B) {
-; CHECK-LABEL: @test13(
-; CHECK-NEXT:    [[TMP1:%.*]] = icmp ne i8 %A, %B
-; CHECK-NEXT:    ret i1 [[TMP1]]
-;
-  %C = icmp ult i8 %A, %B
-  %D = icmp ugt i8 %A, %B
-  %E = xor i1 %C, %D
-  ret i1 %E
-}
-
-define i1 @test14(i8 %A, i8 %B) {
-; CHECK-LABEL: @test14(
-; CHECK-NEXT:    ret i1 true
-;
-  %C = icmp eq i8 %A, %B
-  %D = icmp ne i8 %B, %A
-  %E = xor i1 %C, %D
-  ret i1 %E
-}
-
 define i32 @test15(i32 %A) {
 ; CHECK-LABEL: @test15(
 ; CHECK-NEXT:    [[C:%.*]] = sub i32 0, %A