New testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24191 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/TailCallElim/return-undef.ll b/test/Transforms/TailCallElim/return-undef.ll
new file mode 100644 (file)
index 0000000..116d451
--- /dev/null
+++ b/test/Transforms/TailCallElim/return-undef.ll
@@ -0,0 +1,8 @@
+; RUN: llvm-as < %s | opt -tailcallelim | llvm-dis | grep sub &&
+; RUN: llvm-as < %s | opt -tailcallelim | llvm-dis | not grep call
+
+int %test(int %X) {
+       %Y = sub int %X, 1
+       %Z = call int %test(int %Y)
+       ret int undef
+}