| ; RUN: llc < %s -mattr=+simd128 -verify-machineinstrs | FileCheck %s --check-prefixes CHECK | 
 |  | 
 | ; Check that shuffles maintain their type when being custom | 
 | ; lowered. Regression test for bug 39275. | 
 |  | 
 | target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128" | 
 | target triple = "wasm32-unknown-unknown" | 
 |  | 
 | ; CHECK: v8x16.shuffle | 
 | define <4 x i32> @foo(<4 x i32> %x) { | 
 |   %1 = shufflevector <4 x i32> %x, <4 x i32> undef, | 
 |     <4 x i32> <i32 2, i32 3, i32 undef, i32 undef> | 
 |   %2 = shufflevector <4 x i32> %1, <4 x i32> undef, | 
 |     <4 x i32> <i32 1, i32 undef, i32 undef, i32 undef> | 
 |   %3 = add <4 x i32> %2, %2 | 
 |   ret <4 x i32> %3 | 
 | } |