IR: Move creation logic to MDNodeFwdDecl, NFC

Same as with `MDTuple`, factor out a `friend MDNode` by moving creation
logic to the concrete subclass.

llvm-svn: 225690

1 files changed, 2 insertions, 6 deletions

diff --git a/llvm/lib/IR/Metadata.cpp b/llvm/lib/IR/Metadata.cpp
index 3d444660c67..9088a75156e 100644
--- a/llvm/lib/IR/Metadata.cpp
+++ b/llvm/lib/IR/Metadata.cpp
@@ -607,14 +607,10 @@ MDTuple *MDTuple::getDistinct(LLVMContext &Context, ArrayRef<Metadata *> MDs) {
 
 MDNodeFwdDecl *MDNode::getTemporary(LLVMContext &Context,
                                     ArrayRef<Metadata *> MDs) {
-  MDNodeFwdDecl *N = new (MDs.size()) MDNodeFwdDecl(Context, MDs);
-  return N;
+  return MDNodeFwdDecl::get(Context, MDs);
 }
 
-void MDNode::deleteTemporary(MDNode *N) {
-  assert(isa<MDNodeFwdDecl>(N) && "Expected forward declaration");
-  delete cast<MDNodeFwdDecl>(N);
-}
+void MDNode::deleteTemporary(MDNode *N) { delete cast<MDNodeFwdDecl>(N); }
 
 void UniquableMDNode::storeDistinctInContext() {
   assert(!IsDistinctInContext && "Expected newly distinct metadata");