From b00418af67b36dcd7d70a268ebba3480c1011348 Mon Sep 17 00:00:00 2001
From: Nadav Rotem <nadav.rotem@intel.com>
Date: Sat, 29 Oct 2011 21:23:04 +0000
Subject: Add a new DAGCombine optimization for BUILD_VECTOR. If all of the
 inputs are zero/any_extended, create a new simple BV which can be further
 optimized by other BV optimizations.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143297 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/CodeGen/X86/2011-10-27-tstore.ll | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 test/CodeGen/X86/2011-10-27-tstore.ll

(limited to 'test/CodeGen/X86/2011-10-27-tstore.ll')

diff --git a/test/CodeGen/X86/2011-10-27-tstore.ll b/test/CodeGen/X86/2011-10-27-tstore.ll
new file mode 100644
index 0000000000..016e02c3d5
--- /dev/null
+++ b/test/CodeGen/X86/2011-10-27-tstore.ll
@@ -0,0 +1,16 @@
+; RUN: llc < %s -march=x86-64 -mcpu=corei7 | FileCheck %s
+
+target triple = "x86_64-unknown-linux-gnu"
+
+;CHECK: ltstore
+;CHECK: pshufd
+;CHECK: pshufd
+;CHECK: ret
+define void @ltstore() {
+entry:
+  %in = load <4 x i32>* undef
+  %j = shufflevector <4 x i32> %in, <4 x i32> undef, <2 x i32> <i32 0, i32 1>
+  store <2 x i32> %j, <2 x i32>* undef
+  ret void
+}
+
-- 
cgit v1.2.3