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-rw-r--r--llvm/test/Transforms/InstCombine/2008-08-17-ICmpXorSignbit.ll87
-rw-r--r--llvm/test/Transforms/InstCombine/icmp-xor-signbit.ll197
2 files changed, 197 insertions, 87 deletions
diff --git a/llvm/test/Transforms/InstCombine/2008-08-17-ICmpXorSignbit.ll b/llvm/test/Transforms/InstCombine/2008-08-17-ICmpXorSignbit.ll
deleted file mode 100644
index b91457c79de..00000000000
--- a/llvm/test/Transforms/InstCombine/2008-08-17-ICmpXorSignbit.ll
+++ /dev/null
@@ -1,87 +0,0 @@
-; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt < %s -instcombine -S | FileCheck %s
-
-define i1 @test1(i8 %x, i8 %y) {
-; CHECK-LABEL: @test1(
-; CHECK-NEXT: [[TMP:%.*]] = icmp ult i8 %x, %y
-; CHECK-NEXT: ret i1 [[TMP]]
-;
- %X = xor i8 %x, 128
- %Y = xor i8 %y, 128
- %tmp = icmp slt i8 %X, %Y
- ret i1 %tmp
-}
-
-define i1 @test2(i8 %x, i8 %y) {
-; CHECK-LABEL: @test2(
-; CHECK-NEXT: [[TMP:%.*]] = icmp slt i8 %x, %y
-; CHECK-NEXT: ret i1 [[TMP]]
-;
- %X = xor i8 %x, 128
- %Y = xor i8 %y, 128
- %tmp = icmp ult i8 %X, %Y
- ret i1 %tmp
-}
-
-define i1 @test3(i8 %x) {
-; CHECK-LABEL: @test3(
-; CHECK-NEXT: [[TMP:%.*]] = icmp sgt i8 %x, -114
-; CHECK-NEXT: ret i1 [[TMP]]
-;
- %X = xor i8 %x, 128
- %tmp = icmp uge i8 %X, 15
- ret i1 %tmp
-}
-
-define <2 x i1> @test3vec(<2 x i8> %x) {
-; CHECK-LABEL: @test3vec(
-; CHECK-NEXT: [[TMP:%.*]] = icmp sgt <2 x i8> %x, <i8 -114, i8 -114>
-; CHECK-NEXT: ret <2 x i1> [[TMP]]
-;
- %X = xor <2 x i8> %x, <i8 128, i8 128>
- %tmp = icmp uge <2 x i8> %X, <i8 15, i8 15>
- ret <2 x i1> %tmp
-}
-
-define i1 @test4(i8 %x, i8 %y) {
-; CHECK-LABEL: @test4(
-; CHECK-NEXT: [[TMP:%.*]] = icmp ugt i8 %x, %y
-; CHECK-NEXT: ret i1 [[TMP]]
-;
- %X = xor i8 %x, 127
- %Y = xor i8 %y, 127
- %tmp = icmp slt i8 %X, %Y
- ret i1 %tmp
-}
-
-define i1 @test5(i8 %x, i8 %y) {
-; CHECK-LABEL: @test5(
-; CHECK-NEXT: [[TMP:%.*]] = icmp sgt i8 %x, %y
-; CHECK-NEXT: ret i1 [[TMP]]
-;
- %X = xor i8 %x, 127
- %Y = xor i8 %y, 127
- %tmp = icmp ult i8 %X, %Y
- ret i1 %tmp
-}
-
-define i1 @test6(i8 %x) {
-; CHECK-LABEL: @test6(
-; CHECK-NEXT: [[TMP:%.*]] = icmp slt i8 %x, 113
-; CHECK-NEXT: ret i1 [[TMP]]
-;
- %X = xor i8 %x, 127
- %tmp = icmp uge i8 %X, 15
- ret i1 %tmp
-}
-
-define <2 x i1> @test6vec(<2 x i8> %x) {
-; CHECK-LABEL: @test6vec(
-; CHECK-NEXT: [[TMP:%.*]] = icmp slt <2 x i8> %x, <i8 113, i8 113>
-; CHECK-NEXT: ret <2 x i1> [[TMP]]
-;
- %X = xor <2 x i8> %x, <i8 127, i8 127>
- %tmp = icmp uge <2 x i8> %X, <i8 15, i8 15>
- ret <2 x i1> %tmp
-}
-
diff --git a/llvm/test/Transforms/InstCombine/icmp-xor-signbit.ll b/llvm/test/Transforms/InstCombine/icmp-xor-signbit.ll
new file mode 100644
index 00000000000..4b4d1ddbc5a
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/icmp-xor-signbit.ll
@@ -0,0 +1,197 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -instcombine -S | FileCheck %s
+
+; icmp u/s (a ^ signmask), (b ^ signmask) --> icmp s/u a, b
+
+define i1 @slt_to_ult(i8 %x, i8 %y) {
+; CHECK-LABEL: @slt_to_ult(
+; CHECK-NEXT: [[CMP:%.*]] = icmp ult i8 %x, %y
+; CHECK-NEXT: ret i1 [[CMP]]
+;
+ %a = xor i8 %x, 128
+ %b = xor i8 %y, 128
+ %cmp = icmp slt i8 %a, %b
+ ret i1 %cmp
+}
+
+; PR33138 - https://bugs.llvm.org/show_bug.cgi?id=33138
+
+define <2 x i1> @slt_to_ult_splat(<2 x i8> %x, <2 x i8> %y) {
+; CHECK-LABEL: @slt_to_ult_splat(
+; CHECK-NEXT: [[A:%.*]] = xor <2 x i8> %x, <i8 -128, i8 -128>
+; CHECK-NEXT: [[B:%.*]] = xor <2 x i8> %y, <i8 -128, i8 -128>
+; CHECK-NEXT: [[CMP:%.*]] = icmp slt <2 x i8> [[A]], [[B]]
+; CHECK-NEXT: ret <2 x i1> [[CMP]]
+;
+ %a = xor <2 x i8> %x, <i8 128, i8 128>
+ %b = xor <2 x i8> %y, <i8 128, i8 128>
+ %cmp = icmp slt <2 x i8> %a, %b
+ ret <2 x i1> %cmp
+}
+
+; Make sure that unsigned -> signed works too.
+
+define i1 @ult_to_slt(i8 %x, i8 %y) {
+; CHECK-LABEL: @ult_to_slt(
+; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 %x, %y
+; CHECK-NEXT: ret i1 [[CMP]]
+;
+ %a = xor i8 %x, 128
+ %b = xor i8 %y, 128
+ %cmp = icmp ult i8 %a, %b
+ ret i1 %cmp
+}
+
+define <2 x i1> @ult_to_slt_splat(<2 x i8> %x, <2 x i8> %y) {
+; CHECK-LABEL: @ult_to_slt_splat(
+; CHECK-NEXT: [[A:%.*]] = xor <2 x i8> %x, <i8 -128, i8 -128>
+; CHECK-NEXT: [[B:%.*]] = xor <2 x i8> %y, <i8 -128, i8 -128>
+; CHECK-NEXT: [[CMP:%.*]] = icmp ult <2 x i8> [[A]], [[B]]
+; CHECK-NEXT: ret <2 x i1> [[CMP]]
+;
+ %a = xor <2 x i8> %x, <i8 128, i8 128>
+ %b = xor <2 x i8> %y, <i8 128, i8 128>
+ %cmp = icmp ult <2 x i8> %a, %b
+ ret <2 x i1> %cmp
+}
+
+; icmp u/s (a ^ maxsignval), (b ^ maxsignval) --> icmp s/u' a, b
+
+define i1 @slt_to_ugt(i8 %x, i8 %y) {
+; CHECK-LABEL: @slt_to_ugt(
+; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i8 %x, %y
+; CHECK-NEXT: ret i1 [[CMP]]
+;
+ %a = xor i8 %x, 127
+ %b = xor i8 %y, 127
+ %cmp = icmp slt i8 %a, %b
+ ret i1 %cmp
+}
+
+define <2 x i1> @slt_to_ugt_splat(<2 x i8> %x, <2 x i8> %y) {
+; CHECK-LABEL: @slt_to_ugt_splat(
+; CHECK-NEXT: [[A:%.*]] = xor <2 x i8> %x, <i8 127, i8 127>
+; CHECK-NEXT: [[B:%.*]] = xor <2 x i8> %y, <i8 127, i8 127>
+; CHECK-NEXT: [[CMP:%.*]] = icmp slt <2 x i8> [[A]], [[B]]
+; CHECK-NEXT: ret <2 x i1> [[CMP]]
+;
+ %a = xor <2 x i8> %x, <i8 127, i8 127>
+ %b = xor <2 x i8> %y, <i8 127, i8 127>
+ %cmp = icmp slt <2 x i8> %a, %b
+ ret <2 x i1> %cmp
+}
+
+; Make sure that unsigned -> signed works too.
+
+define i1 @ult_to_sgt(i8 %x, i8 %y) {
+; CHECK-LABEL: @ult_to_sgt(
+; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i8 %x, %y
+; CHECK-NEXT: ret i1 [[CMP]]
+;
+ %a = xor i8 %x, 127
+ %b = xor i8 %y, 127
+ %cmp = icmp ult i8 %a, %b
+ ret i1 %cmp
+}
+
+define <2 x i1> @ult_to_sgt_splat(<2 x i8> %x, <2 x i8> %y) {
+; CHECK-LABEL: @ult_to_sgt_splat(
+; CHECK-NEXT: [[A:%.*]] = xor <2 x i8> %x, <i8 127, i8 127>
+; CHECK-NEXT: [[B:%.*]] = xor <2 x i8> %y, <i8 127, i8 127>
+; CHECK-NEXT: [[CMP:%.*]] = icmp ult <2 x i8> [[A]], [[B]]
+; CHECK-NEXT: ret <2 x i1> [[CMP]]
+;
+ %a = xor <2 x i8> %x, <i8 127, i8 127>
+ %b = xor <2 x i8> %y, <i8 127, i8 127>
+ %cmp = icmp ult <2 x i8> %a, %b
+ ret <2 x i1> %cmp
+}
+
+; icmp u/s (a ^ signmask), C --> icmp s/u a, C'
+
+define i1 @sge_to_ugt(i8 %x) {
+; CHECK-LABEL: @sge_to_ugt(
+; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i8 %x, -114
+; CHECK-NEXT: ret i1 [[CMP]]
+;
+ %a = xor i8 %x, 128
+ %cmp = icmp sge i8 %a, 15
+ ret i1 %cmp
+}
+
+define <2 x i1> @sge_to_ugt_splat(<2 x i8> %x) {
+; CHECK-LABEL: @sge_to_ugt_splat(
+; CHECK-NEXT: [[CMP:%.*]] = icmp ugt <2 x i8> %x, <i8 -114, i8 -114>
+; CHECK-NEXT: ret <2 x i1> [[CMP]]
+;
+ %a = xor <2 x i8> %x, <i8 128, i8 128>
+ %cmp = icmp sge <2 x i8> %a, <i8 15, i8 15>
+ ret <2 x i1> %cmp
+}
+
+; Make sure that unsigned -> signed works too.
+
+define i1 @uge_to_sgt(i8 %x) {
+; CHECK-LABEL: @uge_to_sgt(
+; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i8 %x, -114
+; CHECK-NEXT: ret i1 [[CMP]]
+;
+ %a = xor i8 %x, 128
+ %cmp = icmp uge i8 %a, 15
+ ret i1 %cmp
+}
+
+define <2 x i1> @uge_to_sgt_splat(<2 x i8> %x) {
+; CHECK-LABEL: @uge_to_sgt_splat(
+; CHECK-NEXT: [[CMP:%.*]] = icmp sgt <2 x i8> %x, <i8 -114, i8 -114>
+; CHECK-NEXT: ret <2 x i1> [[CMP]]
+;
+ %a = xor <2 x i8> %x, <i8 128, i8 128>
+ %cmp = icmp uge <2 x i8> %a, <i8 15, i8 15>
+ ret <2 x i1> %cmp
+}
+
+; icmp u/s (a ^ maxsignval), C --> icmp s/u' a, C'
+
+define i1 @sge_to_ult(i8 %x) {
+; CHECK-LABEL: @sge_to_ult(
+; CHECK-NEXT: [[CMP:%.*]] = icmp ult i8 %x, 113
+; CHECK-NEXT: ret i1 [[CMP]]
+;
+ %a = xor i8 %x, 127
+ %cmp = icmp sge i8 %a, 15
+ ret i1 %cmp
+}
+
+define <2 x i1> @sge_to_ult_splat(<2 x i8> %x) {
+; CHECK-LABEL: @sge_to_ult_splat(
+; CHECK-NEXT: [[CMP:%.*]] = icmp ult <2 x i8> %x, <i8 113, i8 113>
+; CHECK-NEXT: ret <2 x i1> [[CMP]]
+;
+ %a = xor <2 x i8> %x, <i8 127, i8 127>
+ %cmp = icmp sge <2 x i8> %a, <i8 15, i8 15>
+ ret <2 x i1> %cmp
+}
+
+; Make sure that unsigned -> signed works too.
+
+define i1 @uge_to_slt(i8 %x) {
+; CHECK-LABEL: @uge_to_slt(
+; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 %x, 113
+; CHECK-NEXT: ret i1 [[CMP]]
+;
+ %a = xor i8 %x, 127
+ %cmp = icmp uge i8 %a, 15
+ ret i1 %cmp
+}
+
+define <2 x i1> @uge_to_slt_splat(<2 x i8> %x) {
+; CHECK-LABEL: @uge_to_slt_splat(
+; CHECK-NEXT: [[CMP:%.*]] = icmp slt <2 x i8> %x, <i8 113, i8 113>
+; CHECK-NEXT: ret <2 x i1> [[CMP]]
+;
+ %a = xor <2 x i8> %x, <i8 127, i8 127>
+ %cmp = icmp uge <2 x i8> %a, <i8 15, i8 15>
+ ret <2 x i1> %cmp
+}
+
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