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78b8d454cc
Machine CSE and other optimizations can remove instructions so folding is possible at peephole while not possible at ISel. This patch is a rework of r160919 and was tested on clang self-host on my local machine. rdar://10554090 and rdar://11873276 llvm-svn: 161152
63 lines
1.5 KiB
LLVM
63 lines
1.5 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-linux -mattr=+sse2 -mcpu=nehalem | FileCheck %s
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; RUN: llc < %s -mtriple=x86_64-win32 -mattr=+sse2 -mcpu=nehalem | FileCheck %s
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define double @t1(float* nocapture %x) nounwind readonly ssp {
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entry:
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; CHECK: t1:
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; CHECK: movss ([[A0:%rdi|%rcx]]), %xmm0
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; CHECK: cvtss2sd %xmm0, %xmm0
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%0 = load float* %x, align 4
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%1 = fpext float %0 to double
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ret double %1
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}
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define float @t2(double* nocapture %x) nounwind readonly ssp optsize {
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entry:
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; CHECK: t2:
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; CHECK: cvtsd2ss ([[A0]]), %xmm0
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%0 = load double* %x, align 8
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%1 = fptrunc double %0 to float
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ret float %1
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}
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define float @squirtf(float* %x) nounwind {
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entry:
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; CHECK: squirtf:
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; CHECK: movss ([[A0]]), %xmm0
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; CHECK: sqrtss %xmm0, %xmm0
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%z = load float* %x
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%t = call float @llvm.sqrt.f32(float %z)
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ret float %t
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}
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define double @squirt(double* %x) nounwind {
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entry:
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; CHECK: squirt:
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; CHECK: sqrtsd ([[A0]]), %xmm0
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%z = load double* %x
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%t = call double @llvm.sqrt.f64(double %z)
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ret double %t
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}
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define float @squirtf_size(float* %x) nounwind optsize {
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entry:
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; CHECK: squirtf_size:
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; CHECK: sqrtss ([[A0]]), %xmm0
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%z = load float* %x
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%t = call float @llvm.sqrt.f32(float %z)
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ret float %t
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}
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define double @squirt_size(double* %x) nounwind optsize {
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entry:
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; CHECK: squirt_size:
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; CHECK: sqrtsd ([[A0]]), %xmm0
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%z = load double* %x
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%t = call double @llvm.sqrt.f64(double %z)
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ret double %t
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}
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declare float @llvm.sqrt.f32(float)
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declare double @llvm.sqrt.f64(double)
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