Support for expanding ADDE and SUBE.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43175 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAGTypes.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAGTypes.cpp
index 38ff2295543ebf2cc2b104edfa89af5f3bc35e92..82a91babe57c15bc18dac37ccf3774887f3c6962 100644 (file)
--- a/lib/CodeGen/SelectionDAG/LegalizeDAGTypes.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeDAGTypes.cpp
@@ -153,6 +153,7 @@ private:
   void ExpandResult_BSWAP      (SDNode *N, SDOperand &Lo, SDOperand &Hi);
   void ExpandResult_ADDSUB     (SDNode *N, SDOperand &Lo, SDOperand &Hi);
   void ExpandResult_ADDSUBC    (SDNode *N, SDOperand &Lo, SDOperand &Hi);
+  void ExpandResult_ADDSUBE    (SDNode *N, SDOperand &Lo, SDOperand &Hi);
   void ExpandResult_SELECT     (SDNode *N, SDOperand &Lo, SDOperand &Hi);
   void ExpandResult_SELECT_CC  (SDNode *N, SDOperand &Lo, SDOperand &Hi);
   void ExpandResult_MUL        (SDNode *N, SDOperand &Lo, SDOperand &Hi);
@@ -653,6 +654,8 @@ void DAGTypeLegalizer::ExpandResult(SDNode *N, unsigned ResNo) {
   case ISD::SUB:         ExpandResult_ADDSUB(N, Lo, Hi); break;
   case ISD::ADDC:
   case ISD::SUBC:        ExpandResult_ADDSUBC(N, Lo, Hi); break;
+  case ISD::ADDE:
+  case ISD::SUBE:        ExpandResult_ADDSUBE(N, Lo, Hi); break;
   case ISD::SELECT:      ExpandResult_SELECT(N, Lo, Hi); break;
   case ISD::SELECT_CC:   ExpandResult_SELECT_CC(N, Lo, Hi); break;
   case ISD::MUL:         ExpandResult_MUL(N, Lo, Hi); break;
@@ -907,6 +910,25 @@ void DAGTypeLegalizer::ExpandResult_ADDSUBC(SDNode *N,
   ReplaceLegalValueWith(SDOperand(N, 1), Hi.getValue(1));
 }
 
+void DAGTypeLegalizer::ExpandResult_ADDSUBE(SDNode *N,
+                                            SDOperand &Lo, SDOperand &Hi) {
+  // Expand the subcomponents.
+  SDOperand LHSL, LHSH, RHSL, RHSH;
+  GetExpandedOp(N->getOperand(0), LHSL, LHSH);
+  GetExpandedOp(N->getOperand(1), RHSL, RHSH);
+  SDVTList VTList = DAG.getVTList(LHSL.getValueType(), MVT::Flag);
+  SDOperand LoOps[3] = { LHSL, RHSL, N->getOperand(2) };
+  SDOperand HiOps[3] = { LHSH, RHSH };
+
+  Lo = DAG.getNode(N->getOpcode(), VTList, LoOps, 3);
+  HiOps[2] = Lo.getValue(1);
+  Hi = DAG.getNode(N->getOpcode(), VTList, HiOps, 3);
+
+  // Legalized the flag result - switch anything that used the old flag to
+  // use the new one.
+  ReplaceLegalValueWith(SDOperand(N, 1), Hi.getValue(1));
+}
+
 void DAGTypeLegalizer::ExpandResult_MUL(SDNode *N,
                                         SDOperand &Lo, SDOperand &Hi) {
   MVT::ValueType VT = N->getValueType(0);