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ea67986297
Summary: This change uses fmf subflags to guard fma optimizations as well as unsafe. These changes originated from D46483 and have been simplified via getNode. Reviewers: spatel, arsenm, hfinkel, javed.absar Reviewed By: spatel Subscribers: nemanjai, wdng Differential Revision: https://reviews.llvm.org/D47388 llvm-svn: 334242
53 lines
2.2 KiB
LLVM
53 lines
2.2 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=avx2,fma -stop-after=expand-isel-pseudos 2>&1 | FileCheck %s
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declare float @llvm.sqrt.f32(float) #0
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define float @foo(float %f) #0 {
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; CHECK: {{name: *foo}}
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; CHECK: body:
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; CHECK: %0:fr32 = COPY $xmm0
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; CHECK: %1:fr32 = VRSQRTSSr killed %2, %0
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; CHECK: %3:fr32 = VMULSSrr %0, %1
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; CHECK: %4:fr32 = VMOVSSrm
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; CHECK: %5:fr32 = VFMADD213SSr %1, killed %3, %4
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; CHECK: %6:fr32 = VMOVSSrm
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; CHECK: %7:fr32 = VMULSSrr %1, %6
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; CHECK: %8:fr32 = VMULSSrr killed %7, killed %5
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; CHECK: %9:fr32 = VMULSSrr %0, %8
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; CHECK: %10:fr32 = VFMADD213SSr %8, %9, %4
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; CHECK: %11:fr32 = VMULSSrr %9, %6
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; CHECK: %12:fr32 = VMULSSrr killed %11, killed %10
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; CHECK: %14:fr32 = FsFLD0SS
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; CHECK: %15:fr32 = VCMPSSrr %0, killed %14, 0
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; CHECK: %17:vr128 = VANDNPSrr killed %16, killed %13
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; CHECK: $xmm0 = COPY %18
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; CHECK: RET 0, $xmm0
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%call = tail call float @llvm.sqrt.f32(float %f) #1
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ret float %call
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}
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define float @rfoo(float %f) #0 {
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; CHECK: {{name: *rfoo}}
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; CHECK: body: |
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; CHECK: %0:fr32 = COPY $xmm0
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; CHECK: %1:fr32 = VRSQRTSSr killed %2, %0
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; CHECK: %3:fr32 = nnan ninf nsz arcp contract afn reassoc VMULSSrr %0, %1
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; CHECK: %4:fr32 = VMOVSSrm
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; CHECK: %5:fr32 = nnan ninf nsz arcp contract afn reassoc VFMADD213SSr %1, killed %3, %4
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; CHECK: %6:fr32 = VMOVSSrm
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; CHECK: %7:fr32 = nnan ninf nsz arcp contract afn reassoc VMULSSrr %1, %6
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; CHECK: %8:fr32 = nnan ninf nsz arcp contract afn reassoc VMULSSrr killed %7, killed %5
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; CHECK: %9:fr32 = nnan ninf nsz arcp contract afn reassoc VMULSSrr %0, %8
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; CHECK: %10:fr32 = nnan ninf nsz arcp contract afn reassoc VFMADD213SSr %8, killed %9, %4
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; CHECK: %11:fr32 = nnan ninf nsz arcp contract afn reassoc VMULSSrr %8, %6
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; CHECK: %12:fr32 = nnan ninf nsz arcp contract afn reassoc VMULSSrr killed %11, killed %10
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; CHECK: $xmm0 = COPY %12
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; CHECK: RET 0, $xmm0
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%sqrt = tail call float @llvm.sqrt.f32(float %f)
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%div = fdiv fast float 1.0, %sqrt
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ret float %div
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}
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attributes #0 = { "unsafe-fp-math"="true" "reciprocal-estimates"="sqrt:2" }
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attributes #1 = { nounwind readnone }
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