Revert r123908; the code in question is completely untested and wrong.

llvm-svn: 126964

2 files changed, 0 insertions, 28 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
index 767b774da2a..0f7359d832a 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
@@ -1051,8 +1051,6 @@ void DAGTypeLegalizer::ExpandIntegerResult(SDNode *N, unsigned ResNo) {
   case ISD::SSUBO: ExpandIntRes_SADDSUBO(N, Lo, Hi); break;
   case ISD::UADDO:
   case ISD::USUBO: ExpandIntRes_UADDSUBO(N, Lo, Hi); break;
-  case ISD::UMULO:
-  case ISD::SMULO: ExpandIntRes_UMULSMULO(N, Lo, Hi); break;
   }
 
   // If Lo/Hi is null, the sub-method took care of registering results etc.
@@ -2128,31 +2126,6 @@ void DAGTypeLegalizer::ExpandIntRes_UADDSUBO(SDNode *N,
   ReplaceValueWith(SDValue(N, 1), Ofl);
 }
 
-void DAGTypeLegalizer::ExpandIntRes_UMULSMULO(SDNode *N,
-                                              SDValue &Lo, SDValue &Hi) {
-  SDValue LHS = N->getOperand(0);
-  SDValue RHS = N->getOperand(1);
-  DebugLoc dl = N->getDebugLoc();
-  EVT VT = N->getValueType(0);
-  EVT HalfVT = EVT::getIntegerVT(*DAG.getContext(), VT.getSizeInBits() / 2);
-  // Expand the result by simply replacing it with the equivalent
-  // non-overflow-checking operation.
-  SDValue Ret = DAG.getNode(ISD::MUL, dl, LHS.getValueType(), LHS, RHS);
-  SplitInteger(Ret, Lo, Hi);
-
-  // Now calculate overflow.
-  SDValue Ofl;
-  if (N->getOpcode() == ISD::UMULO)
-    Ofl = DAG.getSetCC(dl, N->getValueType(1), Hi,
-                       DAG.getConstant(0, VT), ISD::SETNE);
-  else {
-    SDValue Tmp = DAG.getConstant(VT.getSizeInBits() - 1, HalfVT);
-    Tmp = DAG.getNode(ISD::SRA, dl, HalfVT, Lo, Tmp);
-    Ofl = DAG.getSetCC(dl, N->getValueType(1), Hi, Tmp, ISD::SETNE);
-  }
-  ReplaceValueWith(SDValue(N, 1), Ofl);
-}
-
 void DAGTypeLegalizer::ExpandIntRes_UDIV(SDNode *N,
                                          SDValue &Lo, SDValue &Hi) {
   EVT VT = N->getValueType(0);
diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.h b/llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.h
index 3f81bbbe406..ed6c06d5558 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.h
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.h
@@ -348,7 +348,6 @@ private:
 
   void ExpandIntRes_SADDSUBO          (SDNode *N, SDValue &Lo, SDValue &Hi);
   void ExpandIntRes_UADDSUBO          (SDNode *N, SDValue &Lo, SDValue &Hi);
-  void ExpandIntRes_UMULSMULO	      (SDNode *N, SDValue &Lo, SDValue &Hi);
 
   void ExpandShiftByConstant(SDNode *N, unsigned Amt,
                              SDValue &Lo, SDValue &Hi);