SelectionDAGBuilder: move constant initialization out of loop

[mehdi_amini]

Summary

No semantic change intended.

[mehdi_amini]

Fix stupid typo.

[resistor]

lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp

1243

Why do you need to get the context here?

[mehdi_amini]

More cleanup.

[resistor]

LGTM.

lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp

if (!FuncInfo.CanLowerReturn) {
     Chain = DAG.getNode(ISD::TokenFactor, getCurSDLoc(),
                         MVT::Other, Chains);
   } else if (I.getNumOperands() != 0) {
     SmallVector<EVT, 4> ValueVTs;
     ComputeValueVTs(TLI, I.getOperand(0)->getType(), ValueVTs);
     unsigned NumValues = ValueVTs.size();
     if (NumValues) {
       SDValue RetOp = getValue(I.getOperand(0));
-      for (unsigned j = 0, f = NumValues; j != f; ++j) {
-        EVT VT = ValueVTs[j];
-
-        ISD::NodeType ExtendKind = ISD::ANY_EXTEND;
 
-        const Function *F = I.getParent()->getParent();
-        if (F->getAttributes().hasAttribute(AttributeSet::ReturnIndex,
-                                            Attribute::SExt))
-          ExtendKind = ISD::SIGN_EXTEND;
-        else if (F->getAttributes().hasAttribute(AttributeSet::ReturnIndex,
-                                                 Attribute::ZExt))
-          ExtendKind = ISD::ZERO_EXTEND;
+
+      ISD::NodeType ExtendKind = ISD::ANY_EXTEND;
 
+      LLVMContext &Context = F->getContext();
+      bool RetInReg = F->getAttributes().hasAttribute(AttributeSet::ReturnIndex,
+                                                      Attribute::InReg);
+
+      for (unsigned j = 0; j != NumValues; ++j) {
+        EVT VT = ValueVTs[j];
+
         if (ExtendKind != ISD::ANY_EXTEND && VT.isInteger())
-          VT = TLI.getTypeForExtArgOrReturn(*DAG.getContext(), VT, ExtendKind);
+          VT = TLI.getTypeForExtArgOrReturn(Context, VT, ExtendKind);
 
-        unsigned NumParts = TLI.getNumRegisters(*DAG.getContext(), VT);
-        MVT PartVT = TLI.getRegisterType(*DAG.getContext(), VT);
+        unsigned NumParts = TLI.getNumRegisters(Context, VT);
+        MVT PartVT = TLI.getRegisterType(Context, VT);
         SmallVector<SDValue, 4> Parts(NumParts);
         getCopyToParts(DAG, getCurSDLoc(),
                        SDValue(RetOp.getNode(), RetOp.getResNo() + j),
                        &Parts[0], NumParts, PartVT, &I, ExtendKind);
 
         // 'inreg' on function refers to return value
         ISD::ArgFlagsTy Flags = ISD::ArgFlagsTy();
-        if (F->getAttributes().hasAttribute(AttributeSet::ReturnIndex,
-                                            Attribute::InReg))
+        if (RetInReg)
           Flags.setInReg();
 
         // Propagate extension type if any
         if (ExtendKind == ISD::SIGN_EXTEND)
           Flags.setSExt();
         else if (ExtendKind == ISD::ZERO_EXTEND)
           Flags.setZExt();