Enhance EmitInstrWithCustomInserter() so target can specify CFG changes that sdisel will use to properly complete phi nodes.

Not functionality change yet.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82273 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 1 deletions

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.h b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.h
index 9a079d62d5..06acc8a6bf 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.h
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.h
@@ -345,9 +345,15 @@ public:
   /// BitTestCases - Vector of BitTestBlock structures used to communicate
   /// SwitchInst code generation information.
   std::vector<BitTestBlock> BitTestCases;
-  
+
+  /// PHINodesToUpdate - A list of phi instructions whose operand list will
+  /// be updated after processing the current basic block.
   std::vector<std::pair<MachineInstr*, unsigned> > PHINodesToUpdate;
 
+  /// EdgeMapping - If an edge from CurMBB to any MBB is changed (e.g. due to
+  /// scheduler custom lowering), track the change here.
+  DenseMap<MachineBasicBlock*, MachineBasicBlock*> EdgeMapping;
+
   // Emit PHI-node-operand constants only once even if used by multiple
   // PHI nodes.
   DenseMap<Constant*, unsigned> ConstantsOut;