File: pr30663.ll

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llvm-toolchain-16 1%3A16.0.6-15~deb12u1
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; RUN: llc -O1 < %s | FileCheck %s
target triple = "powerpc64le-linux-gnu"

; The second xxspltw should be eliminated.
; CHECK: xxspltw
; CHECK-NOT: xxspltw
define void @Test() {
bb4:
  %tmp = load <4 x i8>, ptr undef
  %tmp8 = bitcast <4 x i8> %tmp to float
  %tmp18 = fmul float %tmp8, undef
  %tmp19 = fsub float 0.000000e+00, %tmp18
  store float %tmp19, ptr undef
  %tmp22 = shufflevector <4 x i8> %tmp, <4 x i8> undef, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 0, i32 1, i32 2, i32 3, i32 0, i32 1, i32 2, i32 3, i32 0, i32 1, i32 2, i32 3>
  %tmp23 = bitcast <16 x i8> %tmp22 to <4 x float>
  %tmp25 = tail call <4 x float> @llvm.fma.v4f32(<4 x float> undef, <4 x float> %tmp23, <4 x float> undef)
  %tmp26 = fsub <4 x float> zeroinitializer, %tmp25
  %tmp27 = bitcast <4 x float> %tmp26 to <4 x i32>
  tail call void @llvm.ppc.altivec.stvx(<4 x i32> %tmp27, ptr undef)
  ret void
}

declare void @llvm.ppc.altivec.stvx(<4 x i32>, ptr)
declare <4 x float> @llvm.fma.v4f32(<4 x float>, <4 x float>, <4 x float>)