IR: Return unique_ptr from MDNode::getTemporary()

Change `MDTuple::getTemporary()` and `MDLocation::getTemporary()` to
return (effectively) `std::unique_ptr<T, MDNode::deleteTemporary>`, and
clean up call sites.  (For now, `DIBuilder` call sites just call
`release()` immediately.)

There's an accompanying change in each of clang and polly to use the new
API.

llvm-svn: 226504

1 files changed, 3 insertions, 3 deletions

diff --git a/llvm/lib/IR/MDBuilder.cpp b/llvm/lib/IR/MDBuilder.cpp
index c7fcf7a2c34..d6d03b48d0f 100644
--- a/llvm/lib/IR/MDBuilder.cpp
+++ b/llvm/lib/IR/MDBuilder.cpp
@@ -68,9 +68,9 @@ MDNode *MDBuilder::createRange(const APInt &Lo, const APInt &Hi) {
 
 MDNode *MDBuilder::createAnonymousAARoot(StringRef Name, MDNode *Extra) {
   // To ensure uniqueness the root node is self-referential.
-  MDNode *Dummy = MDNode::getTemporary(Context, None);
+  auto Dummy = MDNode::getTemporary(Context, None);
 
-  SmallVector<Metadata *, 3> Args(1, Dummy);
+  SmallVector<Metadata *, 3> Args(1, Dummy.get());
   if (Extra)
     Args.push_back(Extra);
   if (!Name.empty())
@@ -82,7 +82,7 @@ MDNode *MDBuilder::createAnonymousAARoot(StringRef Name, MDNode *Extra) {
   //   !1 = metadata !{metadata !0} <- root
   // Replace the dummy operand with the root node itself and delete the dummy.
   Root->replaceOperandWith(0, Root);
-  MDNode::deleteTemporary(Dummy);
+
   // We now have
   //   !1 = metadata !{metadata !1} <- self-referential root
   return Root;