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[InstCombine] Pre-commit tests (NFC)
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‎llvm/test/Transforms/InstCombine/ashr-lshr.ll‎

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@@ -1075,6 +1075,170 @@ entry:
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call void @use(i32 %and)
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%shr = ashr i32 %and, 31
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ret i32 %shr
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define i32 @ashr_shift_mul(i32 noundef %x) {
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; CHECK-LABEL: @ashr_shift_mul(
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; CHECK-NEXT: [[A:%.*]] = ashr exact i32 [[X:%.*]], 3
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; CHECK-NEXT: [[RES:%.*]] = mul i32 [[A]], 9
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; CHECK-NEXT: ret i32 [[RES]]
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;
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%a = ashr exact i32 %x, 3
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%res = mul i32 %a, 9
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ret i32 %res
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}
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define i32 @ashr_shift_mul_nuw(i32 noundef %x) {
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; CHECK-LABEL: @ashr_shift_mul_nuw(
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; CHECK-NEXT: [[A:%.*]] = ashr exact i32 [[X:%.*]], 3
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; CHECK-NEXT: [[RES:%.*]] = mul nuw i32 [[A]], 9
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; CHECK-NEXT: ret i32 [[RES]]
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;
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%a = ashr exact i32 %x, 3
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%res = mul nuw i32 %a, 9
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ret i32 %res
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}
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define i32 @ashr_shift_mul_nsw(i32 noundef %x) {
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; CHECK-LABEL: @ashr_shift_mul_nsw(
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; CHECK-NEXT: [[A:%.*]] = ashr exact i32 [[X:%.*]], 3
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; CHECK-NEXT: [[RES:%.*]] = mul nsw i32 [[A]], 9
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; CHECK-NEXT: ret i32 [[RES]]
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;
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%a = ashr exact i32 %x, 3
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%res = mul nsw i32 %a, 9
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ret i32 %res
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}
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define i32 @lshr_shift_mul_nuw(i32 noundef %x) {
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; CHECK-LABEL: @lshr_shift_mul_nuw(
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; CHECK-NEXT: [[A:%.*]] = lshr exact i32 [[X:%.*]], 3
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; CHECK-NEXT: [[RES:%.*]] = mul nuw i32 [[A]], 9
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; CHECK-NEXT: ret i32 [[RES]]
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;
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%a = lshr exact i32 %x, 3
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%res = mul nuw i32 %a, 9
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ret i32 %res
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}
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define i32 @lshr_shift_mul(i32 noundef %x) {
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; CHECK-LABEL: @lshr_shift_mul(
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; CHECK-NEXT: [[A:%.*]] = lshr exact i32 [[X:%.*]], 3
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; CHECK-NEXT: [[RES:%.*]] = mul i32 [[A]], 9
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; CHECK-NEXT: ret i32 [[RES]]
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;
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%a = lshr exact i32 %x, 3
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%res = mul i32 %a, 9
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ret i32 %res
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}
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define i32 @lshr_shift_mul_nsw(i32 noundef %x) {
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; CHECK-LABEL: @lshr_shift_mul_nsw(
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; CHECK-NEXT: [[A:%.*]] = lshr exact i32 [[X:%.*]], 3
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; CHECK-NEXT: [[RES:%.*]] = mul nuw nsw i32 [[A]], 9
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; CHECK-NEXT: ret i32 [[RES]]
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;
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%a = lshr exact i32 %x, 3
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%res = mul nsw i32 %a, 9
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ret i32 %res
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}
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; Negative test
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define i32 @lshr_no_exact(i32 %x) {
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; CHECK-LABEL: @lshr_no_exact(
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; CHECK-NEXT: [[A:%.*]] = lshr i32 [[X:%.*]], 3
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; CHECK-NEXT: [[RES:%.*]] = mul nuw nsw i32 [[A]], 9
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; CHECK-NEXT: ret i32 [[RES]]
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;
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%a = lshr i32 %x, 3
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%res = mul nsw i32 %a, 9
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ret i32 %res
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}
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; Negative test
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define i32 @ashr_no_exact(i32 %x) {
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; CHECK-LABEL: @ashr_no_exact(
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; CHECK-NEXT: [[A:%.*]] = ashr i32 [[X:%.*]], 3
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; CHECK-NEXT: [[RES:%.*]] = mul nsw i32 [[A]], 9
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; CHECK-NEXT: ret i32 [[RES]]
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;
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%a = ashr i32 %x, 3
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%res = mul nsw i32 %a, 9
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ret i32 %res
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}
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define i32 @lshr_no_undef(i32 %x) {
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; CHECK-LABEL: @lshr_no_undef(
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; CHECK-NEXT: [[A:%.*]] = lshr exact i32 [[X:%.*]], 3
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; CHECK-NEXT: [[RES:%.*]] = mul nuw nsw i32 [[A]], 9
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; CHECK-NEXT: ret i32 [[RES]]
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;
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%a = lshr exact i32 %x, 3
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%res = mul nsw i32 %a, 9
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ret i32 %res
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}
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define i32 @ashr_no_undef(i32 %x) {
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; CHECK-LABEL: @ashr_no_undef(
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; CHECK-NEXT: [[A:%.*]] = ashr exact i32 [[X:%.*]], 3
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; CHECK-NEXT: [[RES:%.*]] = mul nsw i32 [[A]], 9
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; CHECK-NEXT: ret i32 [[RES]]
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;
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%a = ashr exact i32 %x, 3
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%res = mul nsw i32 %a, 9
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ret i32 %res
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}
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define i32 @lshr_multiuse(i32 noundef %x) {
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; CHECK-LABEL: @lshr_multiuse(
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; CHECK-NEXT: [[A:%.*]] = lshr exact i32 [[X:%.*]], 3
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; CHECK-NEXT: call void @use(i32 [[A]])
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; CHECK-NEXT: [[RES:%.*]] = mul nuw nsw i32 [[A]], 9
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; CHECK-NEXT: ret i32 [[RES]]
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;
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%a = lshr exact i32 %x, 3
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call void @use(i32 %a)
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%res = mul nsw i32 %a, 9
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ret i32 %res
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}
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define i32 @lshr_multiuse_no_flags(i32 noundef %x) {
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; CHECK-LABEL: @lshr_multiuse_no_flags(
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; CHECK-NEXT: [[A:%.*]] = lshr exact i32 [[X:%.*]], 3
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; CHECK-NEXT: call void @use(i32 [[A]])
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; CHECK-NEXT: [[RES:%.*]] = mul i32 [[A]], 9
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; CHECK-NEXT: ret i32 [[RES]]
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;
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%a = lshr exact i32 %x, 3
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call void @use(i32 %a)
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%res = mul i32 %a, 9
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ret i32 %res
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}
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define i32 @ashr_multiuse_no_flags(i32 noundef %x) {
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; CHECK-LABEL: @ashr_multiuse_no_flags(
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; CHECK-NEXT: [[A:%.*]] = ashr exact i32 [[X:%.*]], 3
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; CHECK-NEXT: call void @use(i32 [[A]])
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; CHECK-NEXT: [[RES:%.*]] = mul i32 [[A]], 9
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; CHECK-NEXT: ret i32 [[RES]]
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;
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%a = ashr exact i32 %x, 3
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call void @use(i32 %a)
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%res = mul i32 %a, 9
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ret i32 %res
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}
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define i32 @ashr_multiuse(i32 noundef %x) {
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; CHECK-LABEL: @ashr_multiuse(
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; CHECK-NEXT: [[A:%.*]] = ashr exact i32 [[X:%.*]], 3
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; CHECK-NEXT: call void @use(i32 [[A]])
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; CHECK-NEXT: [[RES:%.*]] = mul nsw i32 [[A]], 9
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; CHECK-NEXT: ret i32 [[RES]]
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;
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%a = ashr exact i32 %x, 3
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call void @use(i32 %a)
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%res = mul nsw i32 %a, 9
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ret i32 %res
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}
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declare void @use(i32)

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