1 ; RUN: opt -instcombine -S < %s | FileCheck %s 2 3 define void @test(<4 x float> *%in_ptr, <4 x float> *%out_ptr) { 4 %A = load <4 x float>* %in_ptr, align 16 5 %B = shufflevector <4 x float> %A, <4 x float> undef, <4 x i32> <i32 0, i32 0, i32 undef, i32 undef> 6 %C = shufflevector <4 x float> %B, <4 x float> %A, <4 x i32> <i32 0, i32 1, i32 4, i32 undef> 7 %D = shufflevector <4 x float> %C, <4 x float> %A, <4 x i32> <i32 0, i32 1, i32 2, i32 4> 8 ; CHECK: %D = shufflevector <4 x float> %A, <4 x float> undef, <4 x i32> zeroinitializer 9 store <4 x float> %D, <4 x float> *%out_ptr 10 ret void 11 } 12
