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999a9f171c
Most portions of InstCombine properly propagate fast math flags, but apparently the vector scalarization section was overlooked. llvm-svn: 262376
40 lines
1.4 KiB
LLVM
40 lines
1.4 KiB
LLVM
; RUN: opt -instcombine -S < %s | FileCheck %s
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; CHECK-LABEL: test_scalarize_phi
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; CHECK: fmul fast float
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define void @test_scalarize_phi(i32 * %n, float * %inout) {
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entry:
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%0 = load volatile float, float * %inout, align 4
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%splat.splatinsert = insertelement <4 x float> undef, float %0, i32 0
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%splat.splat = shufflevector <4 x float> %splat.splatinsert, <4 x float> undef, <4 x i32> zeroinitializer
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%splat.splatinsert1 = insertelement <4 x float> undef, float 3.0, i32 0
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br label %for.cond
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for.cond:
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%x.0 = phi <4 x float> [ %splat.splat, %entry ], [ %mul, %for.body ]
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%i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%1 = load i32, i32 * %n, align 4
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%cmp = icmp ne i32 %i.0, %1
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br i1 %cmp, label %for.body, label %for.end
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for.body:
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%2 = extractelement <4 x float> %x.0, i32 1
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store volatile float %2, float * %inout, align 4
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%mul = fmul fast <4 x float> %x.0, <float 0x4002A3D700000000, float 0x4002A3D700000000, float 0x4002A3D700000000, float 0x4002A3D700000000>
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%inc = add nsw i32 %i.0, 1
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br label %for.cond
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for.end:
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ret void
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}
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; CHECK-LABEL: test_extract_element_fastmath
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; CHECK: fadd fast float
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define float @test_extract_element_fastmath(<4 x float> %x) #0 {
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entry:
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%add = fadd fast <4 x float> %x, <float 0x4002A3D700000000, float 0x4002A3D700000000, float 0x4002A3D700000000, float 0x4002A3D700000000>
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%0 = extractelement <4 x float> %add, i32 2
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ret float %0
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}
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