IR: Use Optional instead of unique_ptr for debug info ODR type map, NFC

Save a level of malloc indirection.

llvm-svn: 266749

2 files changed, 2 insertions, 3 deletions

diff --git a/llvm/lib/IR/LLVMContext.cpp b/llvm/lib/IR/LLVMContext.cpp
index 0d4f7242b76..45c28061b0c 100644
--- a/llvm/lib/IR/LLVMContext.cpp
+++ b/llvm/lib/IR/LLVMContext.cpp
@@ -317,8 +317,7 @@ void LLVMContext::enableDebugTypeODRUniquing() {
   if (pImpl->DITypeMap)
     return;
 
-  pImpl->DITypeMap =
-      llvm::make_unique<DenseMap<const MDString *, DICompositeType *>>();
+  pImpl->DITypeMap.emplace();
 }
 
 void LLVMContext::disableDebugTypeODRUniquing() { pImpl->DITypeMap.reset(); }
diff --git a/llvm/lib/IR/LLVMContextImpl.h b/llvm/lib/IR/LLVMContextImpl.h
index 15ac0309831..2938421080b 100644
--- a/llvm/lib/IR/LLVMContextImpl.h
+++ b/llvm/lib/IR/LLVMContextImpl.h
@@ -1022,7 +1022,7 @@ public:
 #include "llvm/IR/Metadata.def"
 
   // Optional map for looking up composite types by identifier.
-  std::unique_ptr<DenseMap<const MDString *, DICompositeType *>> DITypeMap;
+  Optional<DenseMap<const MDString *, DICompositeType *>> DITypeMap;
 
   // MDNodes may be uniqued or not uniqued.  When they're not uniqued, they
   // aren't in the MDNodeSet, but they're still shared between objects, so no