9cac4e6d14
This allows targets to make more decisions about reserved registers after isel. For example, now it should be certain there are calls or stack objects in the frame or not, which could have been introduced by legalization. Patch by Matthias Braun llvm-svn: 363757
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=finalize-isel 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 = VPANDNrr 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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