Allow targets to legalize operations (with illegal operands) that produces multiple values. For example, a load with an illegal operand (a load produces two values, a value and chain).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62663 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 18 insertions, 4 deletions

diff --git a/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp b/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp
index 330ea86cb0..ff7b8a9563 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp
@@ -848,14 +848,28 @@ SDValue DAGTypeLegalizer::CreateStackStoreLoad(SDValue Op,
 
 /// CustomLowerResults - Replace the node's results with custom code provided
 /// by the target and return "true", or do nothing and return "false".
-bool DAGTypeLegalizer::CustomLowerResults(SDNode *N, unsigned ResNo) {
+/// The last parameter is FALSE if we are dealing with a node with legal 
+/// result types and illegal operand. The second parameter denotes the illegal
+/// OperandNo in that case.
+/// The last parameter being TRUE means we are dealing with a
+/// node with illegal result types. The second parameter denotes the illegal 
+/// ResNo in that case.
+bool DAGTypeLegalizer::CustomLowerResults(SDNode *N, unsigned Num, 
+                                          bool LegalizeResult) {
+  // Get the type of illegal Result or Operand.
+  MVT ValueTy = (LegalizeResult) ? N->getValueType(Num) 
+                                 : N->getOperand(Num).getValueType();
+    
   // See if the target wants to custom lower this node.
-  if (TLI.getOperationAction(N->getOpcode(), N->getValueType(ResNo)) !=
-      TargetLowering::Custom)
+  if (TLI.getOperationAction(N->getOpcode(), ValueTy) != TargetLowering::Custom)
     return false;
 
   SmallVector<SDValue, 8> Results;
-  TLI.ReplaceNodeResults(N, Results, DAG);
+  if (LegalizeResult)
+    TLI.ReplaceNodeResults(N, Results, DAG);
+  else
+    TLI.LowerOperationWrapper(SDValue(N, 0), Results, DAG);
+
   if (Results.empty())
     // The target didn't want to custom lower it after all.
     return false;