From 7541cd36fdd1bd044e22497838faac7b8f7e48cd Mon Sep 17 00:00:00 2001
From: Evgeniy Stepanov <eugeni.stepanov@gmail.com>
Date: Fri, 22 Mar 2013 08:43:04 +0000
Subject: Fix llvm::removeUnreachableBlocks to handle unreachable loops.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177713 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/Instrumentation/MemorySanitizer/unreachable.ll | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'test/Instrumentation/MemorySanitizer')

diff --git a/test/Instrumentation/MemorySanitizer/unreachable.ll b/test/Instrumentation/MemorySanitizer/unreachable.ll
index 66a9575d3f..c8130717c7 100644
--- a/test/Instrumentation/MemorySanitizer/unreachable.ll
+++ b/test/Instrumentation/MemorySanitizer/unreachable.ll
@@ -21,3 +21,19 @@ exit:
 ; CHECK: @Func
 ; CHECK: store i32 0, {{.*}} @__msan_retval_tls
 ; CHECK: ret i32 42
+
+
+define i32 @UnreachableLoop() nounwind uwtable {
+entry:
+  ret i32 0
+
+zzz:
+  br label %xxx
+
+xxx:
+  br label %zzz
+}
+
+; CHECK: @UnreachableLoop
+; CHECK: store i32 0, {{.*}} @__msan_retval_tls
+; CHECK: ret i32 0
-- 
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