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Some minor cleanups.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72509 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eli Friedman 2009-05-28 03:06:16 +00:00
parent 3b1259bb9f
commit 3be2e514c9
1 changed files with 30 additions and 54 deletions

84
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp

@ -740,15 +740,31 @@ SDValue SelectionDAGLegalize::LegalizeOp(SDValue Op) {
Action = TLI.getOperationAction(Node->getOpcode(), InnerType);
break;
}
case ISD::SELECT_CC:
case ISD::SETCC:
case ISD::BR_CC: {
unsigned CCOperand = Node->getOpcode() == ISD::SELECT_CC ? 4 :
Node->getOpcode() == ISD::SETCC ? 2 : 1;
unsigned CompareOperand = Node->getOpcode() == ISD::BR_CC ? 2 : 0;
MVT OpVT = Node->getOperand(CompareOperand).getValueType();
ISD::CondCode CCCode =
cast<CondCodeSDNode>(Node->getOperand(CCOperand))->get();
Action = TLI.getCondCodeAction(CCCode, OpVT);
if (Action == TargetLowering::Legal) {
if (Node->getOpcode() == ISD::SELECT_CC)
Action = TLI.getOperationAction(Node->getOpcode(),
Node->getValueType(0));
else
Action = TLI.getOperationAction(Node->getOpcode(), OpVT);
}
break;
}
case ISD::LOAD:
case ISD::STORE:
case ISD::BR_CC:
case ISD::FORMAL_ARGUMENTS:
case ISD::CALL:
case ISD::CALLSEQ_START:
case ISD::CALLSEQ_END:
case ISD::SELECT_CC:
case ISD::SETCC:
// These instructions have properties that aren't modeled in the
// generic codepath
SimpleFinishLegalizing = false;
@ -2215,31 +2231,17 @@ SDValue SelectionDAGLegalize::PromoteLegalINT_TO_FP(SDValue LegalOp,
assert(NewInTy.isInteger() && "Ran out of possibilities!");
// If the target supports SINT_TO_FP of this type, use it.
switch (TLI.getOperationAction(ISD::SINT_TO_FP, NewInTy)) {
default: break;
case TargetLowering::Legal:
if (!TLI.isTypeLegal(NewInTy))
break; // Can't use this datatype.
// FALL THROUGH.
case TargetLowering::Custom:
OpToUse = ISD::SINT_TO_FP;
break;
if (TLI.isOperationLegalOrCustom(ISD::SINT_TO_FP, NewInTy)) {
OpToUse = ISD::SINT_TO_FP;
break;
}
if (OpToUse) break;
if (isSigned) continue;
// If the target supports UINT_TO_FP of this type, use it.
switch (TLI.getOperationAction(ISD::UINT_TO_FP, NewInTy)) {
default: break;
case TargetLowering::Legal:
if (!TLI.isTypeLegal(NewInTy))
break; // Can't use this datatype.
// FALL THROUGH.
case TargetLowering::Custom:
OpToUse = ISD::UINT_TO_FP;
break;
if (TLI.isOperationLegalOrCustom(ISD::UINT_TO_FP, NewInTy)) {
OpToUse = ISD::UINT_TO_FP;
break;
}
if (OpToUse) break;
// Otherwise, try a larger type.
}
@ -2270,31 +2272,15 @@ SDValue SelectionDAGLegalize::PromoteLegalFP_TO_INT(SDValue LegalOp,
NewOutTy = (MVT::SimpleValueType)(NewOutTy.getSimpleVT()+1);
assert(NewOutTy.isInteger() && "Ran out of possibilities!");
// If the target supports FP_TO_SINT returning this type, use it.
switch (TLI.getOperationAction(ISD::FP_TO_SINT, NewOutTy)) {
default: break;
case TargetLowering::Legal:
if (!TLI.isTypeLegal(NewOutTy))
break; // Can't use this datatype.
// FALL THROUGH.
case TargetLowering::Custom:
if (TLI.isOperationLegalOrCustom(ISD::FP_TO_SINT, NewOutTy)) {
OpToUse = ISD::FP_TO_SINT;
break;
}
if (OpToUse) break;
// If the target supports FP_TO_UINT of this type, use it.
switch (TLI.getOperationAction(ISD::FP_TO_UINT, NewOutTy)) {
default: break;
case TargetLowering::Legal:
if (!TLI.isTypeLegal(NewOutTy))
break; // Can't use this datatype.
// FALL THROUGH.
case TargetLowering::Custom:
if (TLI.isOperationLegalOrCustom(ISD::FP_TO_UINT, NewOutTy)) {
OpToUse = ISD::FP_TO_UINT;
break;
}
if (OpToUse) break;
// Otherwise, try a larger type.
}
@ -2303,16 +2289,6 @@ SDValue SelectionDAGLegalize::PromoteLegalFP_TO_INT(SDValue LegalOp,
// Okay, we found the operation and type to use.
SDValue Operation = DAG.getNode(OpToUse, dl, NewOutTy, LegalOp);
// If the operation produces an invalid type, it must be custom lowered. Use
// the target lowering hooks to expand it. Just keep the low part of the
// expanded operation, we know that we're truncating anyway.
if (getTypeAction(NewOutTy) == Expand) {
SmallVector<SDValue, 2> Results;
TLI.ReplaceNodeResults(Operation.getNode(), Results, DAG);
assert(Results.size() == 1 && "Incorrect FP_TO_XINT lowering!");
Operation = Results[0];
}
// Truncate the result of the extended FP_TO_*INT operation to the desired
// size.
return DAG.getNode(ISD::TRUNCATE, dl, DestVT, Operation);
@ -2844,13 +2820,13 @@ void SelectionDAGLegalize::ExpandNode(SDNode *Node,
unsigned DivRemOpc = isSigned ? ISD::SDIVREM : ISD::UDIVREM;
Tmp2 = Node->getOperand(0);
Tmp3 = Node->getOperand(1);
if (TLI.getOperationAction(DivOpc, VT) == TargetLowering::Legal) {
if (TLI.isOperationLegalOrCustom(DivRemOpc, VT)) {
Tmp1 = DAG.getNode(DivRemOpc, dl, VTs, Tmp2, Tmp3).getValue(1);
} else if (TLI.isOperationLegalOrCustom(DivOpc, VT)) {
// X % Y -> X-X/Y*Y
Tmp1 = DAG.getNode(DivOpc, dl, VT, Tmp2, Tmp3);
Tmp1 = DAG.getNode(ISD::MUL, dl, VT, Tmp1, Tmp3);
Tmp1 = DAG.getNode(ISD::SUB, dl, VT, Tmp2, Tmp1);
} else if (TLI.isOperationLegalOrCustom(DivRemOpc, VT)) {
Tmp1 = DAG.getNode(DivRemOpc, dl, VTs, Tmp2, Tmp3).getValue(1);
} else if (isSigned) {
Tmp1 = ExpandIntLibCall(Node, true, RTLIB::SREM_I16, RTLIB::SREM_I32,
RTLIB::SREM_I64, RTLIB::SREM_I128);