Add a missing doxygen comment for a helper method.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144497 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachineBlockPlacement.cpp b/lib/CodeGen/MachineBlockPlacement.cpp
index 3eb2998..ec0877f 100644
--- a/lib/CodeGen/MachineBlockPlacement.cpp
+++ b/lib/CodeGen/MachineBlockPlacement.cpp
@@ -275,6 +275,12 @@
}
#endif
+/// \brief Mark a chain's successors as having one fewer preds.
+///
+/// When a chain is being merged into the "placed" chain, this routine will
+/// quickly walk the successors of each block in the chain and mark them as
+/// having one fewer active predecessor. It also adds any successors of this
+/// chain which reach the zero-predecessor state to the worklist passed in.
void MachineBlockPlacement::markChainSuccessors(
BlockChain &Chain,
MachineBasicBlock *LoopHeaderBB,