IR: Prepare for a new UniquableMDNode subclass, NFC
Add generic dispatch for the parts of `UniquableMDNode` that cast to
`MDTuple`. This makes adding other subclasses (like PR21433's
`MDLocation`) easier.
llvm-svn: 225697
diff --git a/llvm/lib/IR/LLVMContextImpl.cpp b/llvm/lib/IR/LLVMContextImpl.cpp
index c78b760..d47a0d3 100644
--- a/llvm/lib/IR/LLVMContextImpl.cpp
+++ b/llvm/lib/IR/LLVMContextImpl.cpp
@@ -142,7 +142,7 @@
I->dropAllReferences();
for (UniquableMDNode *I : DistinctMDNodes)
- delete cast<MDTuple>(I);
+ I->deleteAsSubclass();
for (MDTuple *I : MDTuples)
delete I;