forked from OSchip/llvm-project
55 lines
1.6 KiB
LLVM
55 lines
1.6 KiB
LLVM
; RUN: opt -S -instcombine < %s | FileCheck %s
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define float @test1(float %x) nounwind readnone ssp {
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entry:
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; CHECK-LABEL: @test1(
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; CHECK-NOT: fpext
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; CHECK-NOT: sqrt(
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; CHECK: sqrtf(
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; CHECK-NOT: fptrunc
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%conv = fpext float %x to double ; <double> [#uses=1]
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%call = tail call double @sqrt(double %conv) readnone nounwind ; <double> [#uses=1]
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%conv1 = fptrunc double %call to float ; <float> [#uses=1]
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; CHECK: ret float
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ret float %conv1
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}
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; PR8096
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define float @test2(float %x) nounwind readnone ssp {
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entry:
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; CHECK-LABEL: @test2(
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; CHECK-NOT: fpext
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; CHECK-NOT: sqrt(
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; CHECK: sqrtf(
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; CHECK-NOT: fptrunc
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%conv = fpext float %x to double ; <double> [#uses=1]
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%call = tail call double @sqrt(double %conv) nounwind ; <double> [#uses=1]
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%conv1 = fptrunc double %call to float ; <float> [#uses=1]
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; CHECK: ret float
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ret float %conv1
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}
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; rdar://9763193
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; Can't fold (fptrunc (sqrt (fpext x))) -> (sqrtf x) since there is another
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; use of sqrt result.
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define float @test3(float* %v) nounwind uwtable ssp {
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entry:
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; CHECK-LABEL: @test3(
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; CHECK: sqrt(
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; CHECK-NOT: sqrtf(
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; CHECK: fptrunc
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%arrayidx13 = getelementptr inbounds float* %v, i64 2
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%tmp14 = load float* %arrayidx13
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%mul18 = fmul float %tmp14, %tmp14
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%add19 = fadd float undef, %mul18
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%conv = fpext float %add19 to double
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%call34 = call double @sqrt(double %conv) readnone
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%call36 = call i32 (double)* @foo(double %call34) nounwind
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%conv38 = fptrunc double %call34 to float
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ret float %conv38
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}
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declare i32 @foo(double)
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declare double @sqrt(double) readnone
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