From c6b8ba86738cb6187835e440f2baafaa24dea0b2 Mon Sep 17 00:00:00 2001
From: Eli Friedman <eli.friedman@gmail.com>
Date: Mon, 19 Sep 2011 21:58:15 +0000
Subject: Fix an infinite loop where a transform in InstCombiner::visitAnd
 claims a construct is changed when it is not.  (See included testcase.)

Patch by Xiaoyi Guo.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140072 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/Transforms/InstCombine/and2.ll | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'test')

diff --git a/test/Transforms/InstCombine/and2.ll b/test/Transforms/InstCombine/and2.ll
index a8881522ea..531aedb668 100644
--- a/test/Transforms/InstCombine/and2.ll
+++ b/test/Transforms/InstCombine/and2.ll
@@ -35,3 +35,10 @@ define i1 @test4(i32 %X) {
 ; CHECK: @test4
 ; CHECK-NEXT: ret i1 false
 }
+
+; Make sure we don't go into an infinite loop with this test
+define <4 x i32> @test5(<4 x i32> %A) {
+  %1 = xor <4 x i32> %A, <i32 1, i32 2, i32 3, i32 4>
+  %2 = and <4 x i32> <i32 1, i32 2, i32 3, i32 4>, %1
+  ret <4 x i32> %2
+}
-- 
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