From 34a13bb412d5d8ac634efa887fad08a7bfb26b2b Mon Sep 17 00:00:00 2001
From: Nadav Rotem <nadav.rotem@intel.com>
Date: Tue, 24 Apr 2012 19:45:28 +0000
Subject: Add a testcase for 155440

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155475 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/CodeGen/X86/avx2-shuffle.ll | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 test/CodeGen/X86/avx2-shuffle.ll

(limited to 'test/CodeGen/X86/avx2-shuffle.ll')

diff --git a/test/CodeGen/X86/avx2-shuffle.ll b/test/CodeGen/X86/avx2-shuffle.ll
new file mode 100644
index 0000000000..218e10b361
--- /dev/null
+++ b/test/CodeGen/X86/avx2-shuffle.ll
@@ -0,0 +1,13 @@
+; RUN: llc < %s -mtriple=x86_64-apple-darwin -mcpu=core-avx2 -mattr=+avx2 | FileCheck %s
+
+; Make sure that we don't match this shuffle using the vpblendw instruction. 
+; The mask for the vpblendw instruction needs to be identical for both halves 
+; of the YMM.
+
+; CHECK: blendw1
+; CHECK-NOT: vpblendw
+; CHECK: ret
+define <16 x i16> @blendw1(<16 x i16> %a, <16 x i16> %b) nounwind alwaysinline {
+  %t = shufflevector <16 x i16> %a, <16 x i16> %b, <16 x i32> <i32 0, i32 17, i32 18, i32 3, i32 20, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>
+  ret <16 x i16> %t
+}
-- 
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