[DAG] ExpandIntRes_Shift - pull out repeated getOpcode() calls. NFC.

Author: RKSimon

llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp

@@ -4527,6 +4527,7 @@ void DAGTypeLegalizer::ExpandIntRes_ShiftThroughStack(SDNode *N, SDValue &Lo,
 void DAGTypeLegalizer::ExpandIntRes_Shift(SDNode *N,
                                           SDValue &Lo, SDValue &Hi) {
   EVT VT = N->getValueType(0);
+  unsigned Opc = N->getOpcode();
   SDLoc dl(N);
 
   // If we can emit an efficient shift operation, do so now.  Check to see if
@@ -4541,12 +4542,12 @@ void DAGTypeLegalizer::ExpandIntRes_Shift(SDNode *N,
 
   // If this target supports shift_PARTS, use it.  First, map to the _PARTS opc.
   unsigned PartsOpc;
-  if (N->getOpcode() == ISD::SHL) {
+  if (Opc == ISD::SHL) {
     PartsOpc = ISD::SHL_PARTS;
-  } else if (N->getOpcode() == ISD::SRL) {
+  } else if (Opc == ISD::SRL) {
     PartsOpc = ISD::SRL_PARTS;
   } else {
-    assert(N->getOpcode() == ISD::SRA && "Unknown shift!");
+    assert(Opc == ISD::SRA && "Unknown shift!");
     PartsOpc = ISD::SRA_PARTS;
   }
 
@@ -4599,7 +4600,7 @@ void DAGTypeLegalizer::ExpandIntRes_Shift(SDNode *N,
   // Otherwise, emit a libcall.
   RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
   bool isSigned;
-  if (N->getOpcode() == ISD::SHL) {
+  if (Opc == ISD::SHL) {
     isSigned = false; /*sign irrelevant*/
     if (VT == MVT::i16)
       LC = RTLIB::SHL_I16;
@@ -4609,7 +4610,7 @@ void DAGTypeLegalizer::ExpandIntRes_Shift(SDNode *N,
       LC = RTLIB::SHL_I64;
     else if (VT == MVT::i128)
       LC = RTLIB::SHL_I128;
-  } else if (N->getOpcode() == ISD::SRL) {
+  } else if (Opc == ISD::SRL) {
     isSigned = false;
     if (VT == MVT::i16)
       LC = RTLIB::SRL_I16;
@@ -4620,7 +4621,7 @@ void DAGTypeLegalizer::ExpandIntRes_Shift(SDNode *N,
     else if (VT == MVT::i128)
       LC = RTLIB::SRL_I128;
   } else {
-    assert(N->getOpcode() == ISD::SRA && "Unknown shift!");
+    assert(Opc == ISD::SRA && "Unknown shift!");
     isSigned = true;
     if (VT == MVT::i16)
       LC = RTLIB::SRA_I16;