Maintain a vaild isTied bit as operands are added and removed.

[oota-llvm.git] / include / llvm / CodeGen / MachineBasicBlock.h

diff --git a/include/llvm/CodeGen/MachineBasicBlock.h b/include/llvm/CodeGen/MachineBasicBlock.h
index 6cacd69095f333b90734f3e0cd107d00be1157fc..77ea4d03ea9288c83f215ce327cf5578e269681e 100644 (file)
--- a/include/llvm/CodeGen/MachineBasicBlock.h
+++ b/include/llvm/CodeGen/MachineBasicBlock.h
@@ -351,6 +351,8 @@ public:
   /// parameter is stored in Weights list and it may be used by
   /// MachineBranchProbabilityInfo analysis to calculate branch probability.
   ///
+  /// Note that duplicate Machine CFG edges are not allowed.
+  ///
   void addSuccessor(MachineBasicBlock *succ, uint32_t weight = 0);
 
   /// removeSuccessor - Remove successor from the successors list of this