diff --git a/test/Transforms/MergeFunc/functions.ll b/test/Transforms/MergeFunc/functions.ll
new file mode 100644
index 00000000000..006fdf52367
--- /dev/null
+++ b/test/Transforms/MergeFunc/functions.ll
@@ -0,0 +1,27 @@
+; RUN: opt -S -mergefunc < %s | FileCheck %s
+
+; Be sure we don't merge cross-referenced functions of same type.
+
+; CHECK-LABEL: @left
+; CHECK-LABEL: entry-block
+; CHECK-LABEL: call void @right(i64 %p)
+define void @left(i64 %p) {
+entry-block:
+  call void @right(i64 %p)
+  call void @right(i64 %p)
+  call void @right(i64 %p)
+  call void @right(i64 %p)
+  ret void
+}
+
+; CHECK-LABEL: @right
+; CHECK-LABEL: entry-block
+; CHECK-LABEL: call void @left(i64 %p)
+define void @right(i64 %p) {
+entry-block:
+  call void @left(i64 %p)
+  call void @left(i64 %p)
+  call void @left(i64 %p)
+  call void @left(i64 %p)
+  ret void
+}