[LLVM-C] Add an accessor for the kind of a Metadata Node

Summary: Allows for retrieving the type of a metadata node.  Has the added benefit of ensuring that the C and C++ kind APIs stay in sync as a failure to add a corresponding LLVMMetadataKind will result in the switch in the accessor being semantically malformed.

Reviewers: whitequark, deadalnix

Reviewed By: whitequark

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D52693

llvm-svn: 343469

1 files changed, 11 insertions, 0 deletions

diff --git a/llvm/lib/IR/DebugInfo.cpp b/llvm/lib/IR/DebugInfo.cpp
index 003a48ca816..e5d7e37c033 100644
--- a/llvm/lib/IR/DebugInfo.cpp
+++ b/llvm/lib/IR/DebugInfo.cpp
@@ -1354,3 +1354,14 @@ LLVMMetadataRef LLVMGetSubprogram(LLVMValueRef Func) {
 void LLVMSetSubprogram(LLVMValueRef Func, LLVMMetadataRef SP) {
   unwrap<Function>(Func)->setSubprogram(unwrap<DISubprogram>(SP));
 }
+
+LLVMMetadataKind LLVMGetMetadataKind(LLVMMetadataRef Metadata) {
+  switch(unwrap(Metadata)->getMetadataID()) {
+#define HANDLE_METADATA_LEAF(CLASS) \
+  case Metadata::CLASS##Kind: \
+    return (LLVMMetadataKind)LLVM##CLASS##MetadataKind;
+#include "llvm/IR/Metadata.def"
+  default:
+    return (LLVMMetadataKind)LLVMGenericDINodeMetadataKind;
+  }
+}