Add comment for SelectionDAGBuilder::SL field.
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
index fa6a6ba..0924939 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
@@ -406,6 +406,8 @@
SelectionDAGBuilder *SDB;
};
+ // Data related to deferred switch lowerings. Used to construct additional
+ // Basic Blocks in SelectionDAGISel::FinishBasicBlock.
std::unique_ptr<SDAGSwitchLowering> SL;
/// A StackProtectorDescriptor structure used to communicate stack protector
