forked from OSchip/llvm-project
[EarlyCSE] add tests for commuted min/max; NFC
See PR35642: https://bugs.llvm.org/show_bug.cgi?id=35642 llvm-svn: 320530
This commit is contained in:
Sanjay Patel
parent
2eda05db87
commit
3cf695aa38
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@ -1,12 +1,13 @@
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; RUN: opt < %s -S -early-cse | FileCheck %s
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; RUN: opt < %s -S -basicaa -early-cse-memssa | FileCheck %s
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; CHECK-LABEL: @test1(
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define void @test1(float %A, float %B, float* %PA, float* %PB) {
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; CHECK-NEXT: fadd
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; CHECK-NEXT: store
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; CHECK-NEXT: store
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; CHECK-NEXT: ret
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: [[C:%.*]] = fadd float %A, %B
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; CHECK-NEXT: store float [[C]], float* %PA
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; CHECK-NEXT: store float [[C]], float* %PB
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; CHECK-NEXT: ret void
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;
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%C = fadd float %A, %B
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store float %C, float* %PA
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%D = fadd float %B, %A
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@ -14,12 +15,13 @@ define void @test1(float %A, float %B, float* %PA, float* %PB) {
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ret void
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}
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; CHECK-LABEL: @test2(
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define void @test2(float %A, float %B, i1* %PA, i1* %PB) {
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; CHECK-NEXT: fcmp
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; CHECK-NEXT: store
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; CHECK-NEXT: store
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; CHECK-NEXT: ret
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: [[C:%.*]] = fcmp oeq float %A, %B
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; CHECK-NEXT: store i1 [[C]], i1* %PA
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; CHECK-NEXT: store i1 [[C]], i1* %PB
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; CHECK-NEXT: ret void
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;
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%C = fcmp oeq float %A, %B
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store i1 %C, i1* %PA
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%D = fcmp oeq float %B, %A
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@ -27,12 +29,13 @@ define void @test2(float %A, float %B, i1* %PA, i1* %PB) {
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ret void
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}
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; CHECK-LABEL: @test3(
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define void @test3(float %A, float %B, i1* %PA, i1* %PB) {
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; CHECK-NEXT: fcmp
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; CHECK-NEXT: store
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; CHECK-NEXT: store
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; CHECK-NEXT: ret
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: [[C:%.*]] = fcmp uge float %A, %B
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; CHECK-NEXT: store i1 [[C]], i1* %PA
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; CHECK-NEXT: store i1 [[C]], i1* %PB
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; CHECK-NEXT: ret void
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;
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%C = fcmp uge float %A, %B
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store i1 %C, i1* %PA
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%D = fcmp ule float %B, %A
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@ -40,12 +43,13 @@ define void @test3(float %A, float %B, i1* %PA, i1* %PB) {
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ret void
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}
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; CHECK-LABEL: @test4(
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define void @test4(i32 %A, i32 %B, i1* %PA, i1* %PB) {
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; CHECK-NEXT: icmp
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; CHECK-NEXT: store
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; CHECK-NEXT: store
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; CHECK-NEXT: ret
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: [[C:%.*]] = icmp eq i32 %A, %B
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; CHECK-NEXT: store i1 [[C]], i1* %PA
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; CHECK-NEXT: store i1 [[C]], i1* %PB
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; CHECK-NEXT: ret void
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;
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%C = icmp eq i32 %A, %B
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store i1 %C, i1* %PA
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%D = icmp eq i32 %B, %A
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@ -53,15 +57,159 @@ define void @test4(i32 %A, i32 %B, i1* %PA, i1* %PB) {
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ret void
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}
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; CHECK-LABEL: @test5(
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define void @test5(i32 %A, i32 %B, i1* %PA, i1* %PB) {
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; CHECK-NEXT: icmp
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; CHECK-NEXT: store
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; CHECK-NEXT: store
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; CHECK-NEXT: ret
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: [[C:%.*]] = icmp sgt i32 %A, %B
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; CHECK-NEXT: store i1 [[C]], i1* %PA
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; CHECK-NEXT: store i1 [[C]], i1* %PB
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; CHECK-NEXT: ret void
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;
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%C = icmp sgt i32 %A, %B
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store i1 %C, i1* %PA
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%D = icmp slt i32 %B, %A
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store i1 %D, i1* %PB
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ret void
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}
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; Min/max operands may be commuted in the compare and select.
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define i8 @smin_commute(i8 %a, i8 %b) {
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; CHECK-LABEL: @smin_commute(
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; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i8 %a, %b
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; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i8 %b, %a
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; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 %a, i8 %b
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; CHECK-NEXT: [[M2:%.*]] = select i1 [[CMP2]], i8 %b, i8 %a
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; CHECK-NEXT: [[R:%.*]] = mul i8 [[M1]], [[M2]]
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; CHECK-NEXT: ret i8 [[R]]
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;
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%cmp1 = icmp slt i8 %a, %b
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%cmp2 = icmp slt i8 %b, %a
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%m1 = select i1 %cmp1, i8 %a, i8 %b
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%m2 = select i1 %cmp2, i8 %b, i8 %a
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%r = mul i8 %m1, %m2
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ret i8 %r
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}
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; Min/max can also have a swapped predicate and select operands.
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define i1 @smin_swapped(i8 %a, i8 %b) {
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; CHECK-LABEL: @smin_swapped(
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; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i8 %a, %b
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; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i8 %a, %b
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; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 %b, i8 %a
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; CHECK-NEXT: [[M2:%.*]] = select i1 [[CMP2]], i8 %a, i8 %b
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; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[M2]], [[M1]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%cmp1 = icmp sgt i8 %a, %b
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%cmp2 = icmp slt i8 %a, %b
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%m1 = select i1 %cmp1, i8 %b, i8 %a
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%m2 = select i1 %cmp2, i8 %a, i8 %b
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%r = icmp eq i8 %m2, %m1
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ret i1 %r
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}
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define i8 @smax_commute(i8 %a, i8 %b) {
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; CHECK-LABEL: @smax_commute(
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; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i8 %a, %b
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; CHECK-NEXT: [[CMP2:%.*]] = icmp sgt i8 %b, %a
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; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 %a, i8 %b
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; CHECK-NEXT: [[M2:%.*]] = select i1 [[CMP2]], i8 %b, i8 %a
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; CHECK-NEXT: [[R:%.*]] = urem i8 [[M2]], [[M1]]
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; CHECK-NEXT: ret i8 [[R]]
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;
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%cmp1 = icmp sgt i8 %a, %b
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%cmp2 = icmp sgt i8 %b, %a
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%m1 = select i1 %cmp1, i8 %a, i8 %b
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%m2 = select i1 %cmp2, i8 %b, i8 %a
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%r = urem i8 %m2, %m1
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ret i8 %r
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}
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define i8 @smax_swapped(i8 %a, i8 %b) {
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; CHECK-LABEL: @smax_swapped(
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; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i8 %a, %b
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; CHECK-NEXT: [[CMP2:%.*]] = icmp sgt i8 %a, %b
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; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 %b, i8 %a
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; CHECK-NEXT: [[M2:%.*]] = select i1 [[CMP2]], i8 %a, i8 %b
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; CHECK-NEXT: [[R:%.*]] = sdiv i8 [[M1]], [[M2]]
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; CHECK-NEXT: ret i8 [[R]]
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;
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%cmp1 = icmp slt i8 %a, %b
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%cmp2 = icmp sgt i8 %a, %b
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%m1 = select i1 %cmp1, i8 %b, i8 %a
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%m2 = select i1 %cmp2, i8 %a, i8 %b
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%r = sdiv i8 %m1, %m2
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ret i8 %r
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}
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define i8 @umin_commute(i8 %a, i8 %b) {
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; CHECK-LABEL: @umin_commute(
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; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i8 %a, %b
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; CHECK-NEXT: [[CMP2:%.*]] = icmp ult i8 %b, %a
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; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 %a, i8 %b
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; CHECK-NEXT: [[M2:%.*]] = select i1 [[CMP2]], i8 %b, i8 %a
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; CHECK-NEXT: [[R:%.*]] = sub i8 [[M2]], [[M1]]
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; CHECK-NEXT: ret i8 [[R]]
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;
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%cmp1 = icmp ult i8 %a, %b
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%cmp2 = icmp ult i8 %b, %a
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%m1 = select i1 %cmp1, i8 %a, i8 %b
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%m2 = select i1 %cmp2, i8 %b, i8 %a
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%r = sub i8 %m2, %m1
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ret i8 %r
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}
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; Choose a vector type just to show that works.
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define <2 x i8> @umin_swapped(<2 x i8> %a, <2 x i8> %b) {
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; CHECK-LABEL: @umin_swapped(
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; CHECK-NEXT: [[CMP1:%.*]] = icmp ugt <2 x i8> %a, %b
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; CHECK-NEXT: [[CMP2:%.*]] = icmp ult <2 x i8> %a, %b
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; CHECK-NEXT: [[M1:%.*]] = select <2 x i1> [[CMP1]], <2 x i8> %b, <2 x i8> %a
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; CHECK-NEXT: [[M2:%.*]] = select <2 x i1> [[CMP2]], <2 x i8> %a, <2 x i8> %b
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; CHECK-NEXT: [[R:%.*]] = sub <2 x i8> [[M2]], [[M1]]
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; CHECK-NEXT: ret <2 x i8> [[R]]
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;
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%cmp1 = icmp ugt <2 x i8> %a, %b
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%cmp2 = icmp ult <2 x i8> %a, %b
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%m1 = select <2 x i1> %cmp1, <2 x i8> %b, <2 x i8> %a
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%m2 = select <2 x i1> %cmp2, <2 x i8> %a, <2 x i8> %b
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%r = sub <2 x i8> %m2, %m1
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ret <2 x i8> %r
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}
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define i8 @umax_commute(i8 %a, i8 %b) {
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; CHECK-LABEL: @umax_commute(
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; CHECK-NEXT: [[CMP1:%.*]] = icmp ugt i8 %a, %b
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; CHECK-NEXT: [[CMP2:%.*]] = icmp ugt i8 %b, %a
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; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 %a, i8 %b
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; CHECK-NEXT: [[M2:%.*]] = select i1 [[CMP2]], i8 %b, i8 %a
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; CHECK-NEXT: [[R:%.*]] = udiv i8 [[M1]], [[M2]]
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; CHECK-NEXT: ret i8 [[R]]
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;
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%cmp1 = icmp ugt i8 %a, %b
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%cmp2 = icmp ugt i8 %b, %a
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%m1 = select i1 %cmp1, i8 %a, i8 %b
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%m2 = select i1 %cmp2, i8 %b, i8 %a
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%r = udiv i8 %m1, %m2
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ret i8 %r
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}
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define i8 @umax_swapped(i8 %a, i8 %b) {
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; CHECK-LABEL: @umax_swapped(
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; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i8 %a, %b
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; CHECK-NEXT: [[CMP2:%.*]] = icmp ugt i8 %a, %b
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; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 %b, i8 %a
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; CHECK-NEXT: [[M2:%.*]] = select i1 [[CMP2]], i8 %a, i8 %b
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; CHECK-NEXT: [[R:%.*]] = add i8 [[M2]], [[M1]]
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; CHECK-NEXT: ret i8 [[R]]
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;
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%cmp1 = icmp ult i8 %a, %b
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%cmp2 = icmp ugt i8 %a, %b
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%m1 = select i1 %cmp1, i8 %b, i8 %a
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%m2 = select i1 %cmp2, i8 %a, i8 %b
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%r = add i8 %m2, %m1
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ret i8 %r
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}
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