From d2070b00efb97ee32e360d53edfd7bf6de88d62c Mon Sep 17 00:00:00 2001
From: Nadav Rotem <nadav.rotem@intel.com>
Date: Thu, 12 Jan 2012 15:31:55 +0000
Subject: Fix a bug in the AVX 256-bit shuffle code in cases where the splat
 element is on the boundary of two 128-bit vectors. The attached testcase was
 stuck in an endless loop.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148027 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/CodeGen/X86/2012-01-12-extract-sv.ll | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 test/CodeGen/X86/2012-01-12-extract-sv.ll

(limited to 'test/CodeGen/X86/2012-01-12-extract-sv.ll')

diff --git a/test/CodeGen/X86/2012-01-12-extract-sv.ll b/test/CodeGen/X86/2012-01-12-extract-sv.ll
new file mode 100644
index 0000000000..fa8e80f0bd
--- /dev/null
+++ b/test/CodeGen/X86/2012-01-12-extract-sv.ll
@@ -0,0 +1,12 @@
+; RUN: llc < %s -march=x86 -mcpu=corei7-avx -mattr=+avx -mtriple=i686-pc-win32 | FileCheck %s
+
+; CHECK: endless_loop
+define void @endless_loop() {
+entry:
+  %0 = load <8 x i32> addrspace(1)* undef, align 32
+  %1 = shufflevector <8 x i32> %0, <8 x i32> undef, <16 x i32> <i32 4, i32 4, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
+  %2 = shufflevector <16 x i32> <i32 undef, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 undef>, <16 x i32> %1, <16 x i32> <i32 16, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 17>
+  store <16 x i32> %2, <16 x i32> addrspace(1)* undef, align 64
+  ret void
+; CHECK: ret
+}
-- 
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