derek.holloway
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60 lines
2.0 KiB
LLVM
60 lines
2.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mattr=+fma | FileCheck %s
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; This test checks that (fneg (fma (fneg x), y, (fneg z))) can't be folded to (fma x, y, z)
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; without no signed zeros flag (nsz).
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declare float @llvm.fma.f32(float, float, float)
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define float @fneg_fma32(float %x, float %y, float %z) {
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; CHECK-LABEL: fneg_fma32:
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; CHECK: # %bb.0:
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; CHECK-NEXT: vfnmsub213ss {{.*#+}} xmm0 = -(xmm1 * xmm0) - xmm2
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; CHECK-NEXT: vxorps {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm0, %xmm0
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; CHECK-NEXT: retq
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%negx = fneg float %x
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%negz = fneg float %z
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%fma = call float @llvm.fma.f32(float %negx, float %y, float %negz)
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%n = fneg float %fma
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ret float %n
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}
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define float @fneg_fma32_nsz(float %x, float %y, float %z) {
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; CHECK-LABEL: fneg_fma32_nsz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: vfmadd213ss {{.*#+}} xmm0 = (xmm1 * xmm0) + xmm2
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; CHECK-NEXT: retq
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%negx = fneg float %x
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%negz = fneg float %z
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%fma = call nsz float @llvm.fma.f32(float %negx, float %y, float %negz)
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%n = fneg float %fma
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ret float %n
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}
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declare double @llvm.fma.f64(double, double, double)
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define double @fneg_fma64(double %x, double %y, double %z) {
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; CHECK-LABEL: fneg_fma64:
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; CHECK: # %bb.0:
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; CHECK-NEXT: vfnmsub213sd {{.*#+}} xmm0 = -(xmm1 * xmm0) - xmm2
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; CHECK-NEXT: vxorpd {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm0, %xmm0
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; CHECK-NEXT: retq
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%negx = fneg double %x
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%negz = fneg double %z
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%fma = call double @llvm.fma.f64(double %negx, double %y, double %negz)
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%n = fneg double %fma
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ret double %n
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}
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define double @fneg_fma64_nsz(double %x, double %y, double %z) {
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; CHECK-LABEL: fneg_fma64_nsz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: vfmadd213sd {{.*#+}} xmm0 = (xmm1 * xmm0) + xmm2
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; CHECK-NEXT: retq
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%negx = fneg double %x
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%negz = fneg double %z
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%fma = call nsz double @llvm.fma.f64(double %negx, double %y, double %negz)
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%n = fneg double %fma
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ret double %n
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}
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