commit 2da09e44082b3caea7ab6347af522ece9a29edd9
author Duncan P. N. Exon Smith <dexonsmith@apple.com> Tue Jan 20 00:58:46 2015 +0000
committer Duncan P. N. Exon Smith <dexonsmith@apple.com> Tue Jan 20 00:58:46 2015 +0000
tree 9f697967349b64fbce28dcbd028861c62e4cdbb3
parent 0f529998a5355fde5662719c56e74492802cb816

IR: Canonicalize GenericDwarfNode empty headers to null

llvm-svn: 226532

llvm/unittests/IR/MetadataTest.cpp

diff --git a/llvm/unittests/IR/MetadataTest.cpp b/llvm/unittests/IR/MetadataTest.cpp
index f2140d6..e2ed3d7 100644
--- a/llvm/unittests/IR/MetadataTest.cpp
+++ b/llvm/unittests/IR/MetadataTest.cpp
@@ -596,6 +596,14 @@
   EXPECT_EQ(N, GenericDwarfNode::get(Context, 15, Header, Ops1));
 }
 
+TEST_F(GenericDwarfNodeTest, getEmptyHeader) {
+  // Canonicalize !"" to null.
+  auto *Header = MDString::get(Context, "");
+  EXPECT_NE(nullptr, Header);
+  auto *N = GenericDwarfNode::get(Context, 15, Header, None);
+  EXPECT_EQ(nullptr, N->getHeader());
+}
+
 typedef MetadataTest MetadataAsValueTest;
 
 TEST_F(MetadataAsValueTest, MDNode) {