From 703c38bf584b39275ba517982677491607f46d20 Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper@gmail.com>
Date: Wed, 20 Jun 2012 05:39:26 +0000
Subject: Don't insert 128-bit UNDEF into 256-bit vectors. Just keep the
 256-bit vector. Original patch by Elena Demikhovsky. Tweaked by me to allow
 possibility of covering more cases.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158792 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/CodeGen/X86/avx-shuffle.ll | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'test/CodeGen/X86/avx-shuffle.ll')

diff --git a/test/CodeGen/X86/avx-shuffle.ll b/test/CodeGen/X86/avx-shuffle.ll
index f1debffd11..edfe4ab6c7 100644
--- a/test/CodeGen/X86/avx-shuffle.ll
+++ b/test/CodeGen/X86/avx-shuffle.ll
@@ -219,3 +219,11 @@ define <16 x i16> @narrow(<16 x i16> %a) nounwind alwaysinline {
   %t = shufflevector <16 x i16> %a, <16 x i16> undef, <16 x i32> <i32 2, i32 3, i32 undef, i32 1, i32 6, i32 7, i32 4, i32 5, i32 10, i32 11, i32 8, i32 undef, i32 14, i32 15, i32 undef, i32 undef>
   ret <16 x i16> %t
 }
+
+;CHECK: test17
+;CHECK-NOT: vinsertf128
+;CHECK: ret
+define   <8 x float> @test17(<4 x float> %y) {
+  %x = shufflevector <4 x float> %y, <4 x float> undef, <8 x i32> <i32 undef, i32 1, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
+  ret <8 x float> %x
+}
-- 
cgit v1.2.3