IR: Delete GenericDwarfNode during teardown

Fix a leak in `LLVMContextImpl` teardown that the leak sanitizer tracked
down [1].  I've just switched to automatic dispatch here (since I'll
inevitably forget again with the next class).

[1]: http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux-fast/builds/811/steps/check-llvm%20asan/logs/stdio

llvm-svn: 226536

1 files changed, 6 insertions, 6 deletions

diff --git a/llvm/lib/IR/LLVMContextImpl.cpp b/llvm/lib/IR/LLVMContextImpl.cpp
index 81ff9a96f49..aa7242af997 100644
--- a/llvm/lib/IR/LLVMContextImpl.cpp
+++ b/llvm/lib/IR/LLVMContextImpl.cpp
@@ -78,10 +78,10 @@ LLVMContextImpl::~LLVMContextImpl() {
   // unnecessary RAUW when nodes are still unresolved.
   for (auto *I : DistinctMDNodes)
     I->dropAllReferences();
-  for (auto *I : MDTuples)
-    I->dropAllReferences();
-  for (auto *I : MDLocations)
+#define HANDLE_MDNODE_LEAF(CLASS)                                              \
+  for (auto *I : CLASS##s)                                                     \
     I->dropAllReferences();
+#include "llvm/IR/Metadata.def"
 
   // Also drop references that come from the Value bridges.
   for (auto &Pair : ValuesAsMetadata)
@@ -92,10 +92,10 @@ LLVMContextImpl::~LLVMContextImpl() {
   // Destroy MDNodes.
   for (MDNode *I : DistinctMDNodes)
     I->deleteAsSubclass();
-  for (MDTuple *I : MDTuples)
-    delete I;
-  for (MDLocation *I : MDLocations)
+#define HANDLE_MDNODE_LEAF(CLASS)                                              \
+  for (CLASS *I : CLASS##s)                                                    \
     delete I;
+#include "llvm/IR/Metadata.def"
 
   // Free the constants.  This is important to do here to ensure that they are
   // freed before the LeakDetector is torn down.