New testcase that caused infinite loop in taildup

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7242 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/TailDup/2003-07-22-InfiniteLoop.ll b/test/Transforms/TailDup/2003-07-22-InfiniteLoop.ll
new file mode 100644 (file)
index 0000000..3e6ca09
--- /dev/null
+++ b/test/Transforms/TailDup/2003-07-22-InfiniteLoop.ll
@@ -0,0 +1,13 @@
+; RUN: as < %s | opt -tailduplicate -disable-output
+
+implementation
+
+int %sum() {
+entry:
+       br label %loopentry
+
+loopentry:
+       %i.0 = phi int [ 1, %entry ], [ %tmp.3, %loopentry ]
+       %tmp.3 = add int %i.0, 1
+       br label %loopentry
+}