When tail duplicating these functions, the add instruction should not be

duplicated, even though the block it is in is duplicated.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16757 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/TailDup/MergeTest.ll b/test/Transforms/TailDup/MergeTest.ll
new file mode 100644 (file)
index 0000000..ef6fe07
--- /dev/null
+++ b/test/Transforms/TailDup/MergeTest.ll
@@ -0,0 +1,31 @@
+; RUN: llvm-as < %s | opt -tailduplicate  | llvm-dis | grep add | not grep uses=1
+
+int %test1(bool %C, int %A, int* %P) {
+entry:
+        br bool %C, label %L1, label %L2
+
+L1:
+       store int 1, int* %P
+        br label %L2
+
+L2:
+       %X = add int %A, 17
+       ret int %X
+}
+
+int %test2(bool %C, int %A, int* %P) {
+entry:
+        br bool %C, label %L1, label %L2
+
+L1:
+       store int 1, int* %P
+        br label %L3
+
+L2:
+       store int 7, int* %P
+       br label %L3
+L3:
+       %X = add int %A, 17
+       ret int %X
+}
+