; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=avx| FileCheck %s ; Verify that we generate a single OR instruction for a scalar, vec128, and vec256 ; FNABS(x) operation -> FNEG (FABS(x)). ; If the FABS() result isn't used, the AND instruction should be eliminated. ; PR20578: http://llvm.org/bugs/show_bug.cgi?id=20578 define float @scalar_no_abs(float %a) { ; CHECK-LABEL: scalar_no_abs: ; CHECK: vorps ; CHECK-NEXT: retq %fabs = tail call float @fabsf(float %a) #1 %fsub = fsub float -0.0, %fabs ret float %fsub } define float @scalar_uses_abs(float %a) { ; CHECK-LABEL: scalar_uses_abs: ; CHECK-DAG: vandps ; CHECK-DAG: vorps ; CHECK: vmulss ; CHECK-NEXT: retq %fabs = tail call float @fabsf(float %a) #1 %fsub = fsub float -0.0, %fabs %fmul = fmul float %fsub, %fabs ret float %fmul } define <4 x float> @vector128_no_abs(<4 x float> %a) { ; CHECK-LABEL: vector128_no_abs: ; CHECK: vorps ; CHECK-NEXT: retq %fabs = tail call <4 x float> @llvm.fabs.v4f32(< 4 x float> %a) #1 %fsub = fsub <4 x float> , %fabs ret <4 x float> %fsub } define <4 x float> @vector128_uses_abs(<4 x float> %a) { ; CHECK-LABEL: vector128_uses_abs: ; CHECK-DAG: vandps ; CHECK-DAG: vorps ; CHECK: vmulps ; CHECK-NEXT: retq %fabs = tail call <4 x float> @llvm.fabs.v4f32(<4 x float> %a) #1 %fsub = fsub <4 x float> , %fabs %fmul = fmul <4 x float> %fsub, %fabs ret <4 x float> %fmul } define <8 x float> @vector256_no_abs(<8 x float> %a) { ; CHECK-LABEL: vector256_no_abs: ; CHECK: vorps ; CHECK-NEXT: retq %fabs = tail call <8 x float> @llvm.fabs.v8f32(< 8 x float> %a) #1 %fsub = fsub <8 x float> , %fabs ret <8 x float> %fsub } define <8 x float> @vector256_uses_abs(<8 x float> %a) { ; CHECK-LABEL: vector256_uses_abs: ; CHECK-DAG: vandps ; CHECK-DAG: vorps ; CHECK: vmulps ; CHECK-NEXT: retq %fabs = tail call <8 x float> @llvm.fabs.v8f32(<8 x float> %a) #1 %fsub = fsub <8 x float> , %fabs %fmul = fmul <8 x float> %fsub, %fabs ret <8 x float> %fmul } declare <4 x float> @llvm.fabs.v4f32(<4 x float> %p) declare <8 x float> @llvm.fabs.v8f32(<8 x float> %p) declare float @fabsf(float) attributes #1 = { readnone }