From 97136c922ec4b492584cb91c1fc1cdcb40983ecf Mon Sep 17 00:00:00 2001
From: Bruno Cardoso Lopes <bruno.cardoso@gmail.com>
Date: Mon, 19 Sep 2011 23:36:50 +0000
Subject: Based on the small opt Zvi's patch was trying to achieve, eliminate
 128-bit undef subvector insertion into a 256-bit vector

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140097 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/CodeGen/X86/avx-vinsertf128.ll | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'test')

diff --git a/test/CodeGen/X86/avx-vinsertf128.ll b/test/CodeGen/X86/avx-vinsertf128.ll
index a6f2585..8813a7f 100644
--- a/test/CodeGen/X86/avx-vinsertf128.ll
+++ b/test/CodeGen/X86/avx-vinsertf128.ll
@@ -36,3 +36,11 @@ allocas:
   store <4 x i32> %blendAsInt.i503, <4 x i32>* undef, align 4
   ret void
 }
+
+; CHECK: _C
+; CHECK-NOT: vinsertf128 $1
+define <4 x i32> @C(<4 x i32> %v1) nounwind readonly {
+  %1 = shufflevector <4 x i32> %v1, <4 x i32> undef, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
+  %2 = shufflevector <8 x i32> %1, <8 x i32> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
+  ret <4 x i32> %2
+}
-- 
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