AsmWriter: Handle broken metadata nodes
Print out temporary `MDNode`s so we don't crash in the verifier (or
during `dump()` output).
llvm-svn: 232417
diff --git a/llvm/unittests/IR/MetadataTest.cpp b/llvm/unittests/IR/MetadataTest.cpp
index 12fa3923..70ce294 100644
--- a/llvm/unittests/IR/MetadataTest.cpp
+++ b/llvm/unittests/IR/MetadataTest.cpp
@@ -251,6 +251,22 @@
EXPECT_EQ(Expected_, Actual_); \
} while (false)
+TEST_F(MDNodeTest, PrintTemporary) {
+ MDNode *Arg = getNode();
+ TempMDNode Temp = MDNode::getTemporary(Context, Arg);
+ MDNode *N = getNode(Temp.get());
+ Module M("test", Context);
+ NamedMDNode *NMD = M.getOrInsertNamedMetadata("named");
+ NMD->addOperand(N);
+
+ EXPECT_PRINTER_EQ("!0 = !{!1}", N->print(OS, &M));
+ EXPECT_PRINTER_EQ("!1 = <temporary!> !{!2}", Temp->print(OS, &M));
+ EXPECT_PRINTER_EQ("!2 = !{}", Arg->print(OS, &M));
+
+ // Cleanup.
+ Temp->replaceAllUsesWith(Arg);
+}
+
TEST_F(MDNodeTest, PrintFromModule) {
Constant *C = ConstantInt::get(Type::getInt32Ty(Context), 7);
MDString *S = MDString::get(Context, "foo");