Added functions cross-reference test.

Originally this similar was initiated by Björn Steinbrink here:
http://reviews.llvm.org/D3437

Bug itself has been fixed by principal changes in MergeFunctions. Though
special checks for functions merging are still actual. And the test has
been accepted with slight modifications.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210486 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/MergeFunc/functions.ll b/test/Transforms/MergeFunc/functions.ll
new file mode 100644 (file)
index 0000000..006fdf5
--- /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
+}