CodeGen: Let the BumpPtrAllocator free the elements of indexList

The indexList's nodes are all allocated on a BumpPtrAllocator, so it's
more efficient to let them be freed when it goes away, rather than
deleting them directly. This is a follow up to r254794.

llvm-svn: 254808

1 files changed, 5 insertions, 0 deletions

diff --git a/llvm/include/llvm/CodeGen/SlotIndexes.h b/llvm/include/llvm/CodeGen/SlotIndexes.h
index 5dc42e20deb..7b621bee259 100644
--- a/llvm/include/llvm/CodeGen/SlotIndexes.h
+++ b/llvm/include/llvm/CodeGen/SlotIndexes.h
@@ -376,6 +376,11 @@ namespace llvm {
       initializeSlotIndexesPass(*PassRegistry::getPassRegistry());
     }
 
+    ~SlotIndexes() {
+      // The indexList's nodes are all allocated in the BumpPtrAllocator.
+      indexList.clearAndLeakNodesUnsafely();
+    }
+
     void getAnalysisUsage(AnalysisUsage &au) const override;
     void releaseMemory() override;