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      1 ; RUN: llc -verify-machineinstrs -mtriple=powerpc64-linux-gnu -mcpu=pwr8 -mattr=+vsx < %s | FileCheck %s
      2 
      3 define <4 x float> @bar(float* %p, float* %q) {
      4   %1 = bitcast float* %p to <12 x float>*
      5   %2 = bitcast float* %q to <12 x float>*
      6   %3 = load <12 x float>, <12 x float>* %1, align 16
      7   %4 = load <12 x float>, <12 x float>* %2, align 16
      8   %5 = fsub <12 x float> %4, %3
      9   %6 = shufflevector <12 x float> %5, <12 x float> undef, <4 x i32> <i32 0, i32 3, i32 6, i32 9>
     10   ret <4 x float>  %6
     11 
     12 ; CHECK: xxsldwi
     13 ; CHECK-DAG: vmrghw
     14 ; CHECK-DAG: vmrglw
     15 ; CHECK-NEXT: xxsldwi
     16 ; CHECK-NEXT: xxsldwi
     17 ; CHECK-NEXT: xxsldwi
     18 ; CHECK-NEXT: blr
     19 }
     20