new test

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10466 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/TailCallElim/return_constant.ll b/test/Transforms/TailCallElim/return_constant.ll
new file mode 100644 (file)
index 0000000..daa7d3a
--- /dev/null
+++ b/test/Transforms/TailCallElim/return_constant.ll
@@ -0,0 +1,19 @@
+; Though this case seems to be fairly unlikely to occur in the wild, someone
+; plunked it into the demo script, so maybe they care about it.
+;
+; RUN: llvm-as < %s | opt -tailcallelim | llvm-dis | not grep call
+
+int %aaa(int %c) {
+entry:
+        %tmp.1 = seteq int %c, 0                ; <bool> [#uses=1]
+        br bool %tmp.1, label %return, label %else
+
+else:           ; preds = %entry
+        %tmp.5 = add int %c, -1         ; <int> [#uses=1]
+        %tmp.3 = call int %aaa( int %tmp.5 )            ; <int> [#uses=0]
+        ret int 0
+
+return:         ; preds = %entry
+        ret int 0
+}
+