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instead of having all conversions be handled by one case value, and then have

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subcases inside, break things out earlier.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22546 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-07-28 23:31:12 +00:00
parent 70df32a138
commit fa9c801a6b
1 changed files with 87 additions and 65 deletions
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152
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -1438,62 +1438,103 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
break;
// Conversion operators. The source and destination have different types.
case ISD::ZERO_EXTEND:
case ISD::SIGN_EXTEND:
case ISD::TRUNCATE:
case ISD::FP_EXTEND:
case ISD::FP_ROUND:
case ISD::FP_TO_SINT:
case ISD::FP_TO_UINT:
case ISD::SINT_TO_FP:
case ISD::UINT_TO_FP:
case ISD::UINT_TO_FP: {
bool isSigned = Node->getOpcode() == ISD::SINT_TO_FP;
switch (getTypeAction(Node->getOperand(0).getValueType())) {
case Legal:
//still made need to expand if the op is illegal, but the types are legal
if (Node->getOpcode() == ISD::UINT_TO_FP ||
Node->getOpcode() == ISD::SINT_TO_FP) {
bool isSigned = Node->getOpcode() == ISD::SINT_TO_FP;
switch (TLI.getOperationAction(Node->getOpcode(),
Node->getOperand(0).getValueType())) {
default: assert(0 && "Unknown operation action!");
case TargetLowering::Expand:
if (!isSigned)
Result = ExpandLegalUINT_TO_FP(LegalizeOp(Node->getOperand(0)),
Node->getValueType(0));
else
assert(0 && "Legalize cannot Expand SINT_TO_FP yet");
AddLegalizedOperand(Op, Result);
return Result;
case TargetLowering::Promote:
Result = PromoteLegalINT_TO_FP(LegalizeOp(Node->getOperand(0)),
Node->getValueType(0),
isSigned);
AddLegalizedOperand(Op, Result);
return Result;
case TargetLowering::Legal:
break;
}
switch (TLI.getOperationAction(Node->getOpcode(),
Node->getOperand(0).getValueType())) {
default: assert(0 && "Unknown operation action!");
case TargetLowering::Expand:
assert(!isSigned && "Legalize cannot Expand SINT_TO_FP yet");
Result = ExpandLegalUINT_TO_FP(LegalizeOp(Node->getOperand(0)),
Node->getValueType(0));
AddLegalizedOperand(Op, Result);
return Result;
case TargetLowering::Promote:
Result = PromoteLegalINT_TO_FP(LegalizeOp(Node->getOperand(0)),
Node->getValueType(0),
isSigned);
AddLegalizedOperand(Op, Result);
return Result;
case TargetLowering::Legal:
break;
}
Tmp1 = LegalizeOp(Node->getOperand(0));
if (Tmp1 != Node->getOperand(0))
Result = DAG.getNode(Node->getOpcode(), Node->getValueType(0), Tmp1);
break;
case Expand:
if (Node->getOpcode() == ISD::SINT_TO_FP ||
Node->getOpcode() == ISD::UINT_TO_FP) {
Result = ExpandIntToFP(Node->getOpcode() == ISD::SINT_TO_FP,
Node->getValueType(0), Node->getOperand(0));
break;
} else if (Node->getOpcode() == ISD::TRUNCATE) {
// In the expand case, we must be dealing with a truncate, because
// otherwise the result would be larger than the source.
ExpandOp(Node->getOperand(0), Tmp1, Tmp2);
// Since the result is legal, we should just be able to truncate the low
// part of the source.
Result = DAG.getNode(ISD::TRUNCATE, Node->getValueType(0), Tmp1);
break;
Result = ExpandIntToFP(Node->getOpcode() == ISD::SINT_TO_FP,
Node->getValueType(0), Node->getOperand(0));
break;
case Promote:
if (isSigned) {
Result = PromoteOp(Node->getOperand(0));
Result = DAG.getNode(ISD::SIGN_EXTEND_INREG, Result.getValueType(),
Result, DAG.getValueType(Node->getOperand(0).getValueType()));
Result = DAG.getNode(ISD::SINT_TO_FP, Op.getValueType(), Result);
} else {
Result = PromoteOp(Node->getOperand(0));
Result = DAG.getZeroExtendInReg(Result,
Node->getOperand(0).getValueType());
Result = DAG.getNode(ISD::UINT_TO_FP, Op.getValueType(), Result);
}
break;
}
break;
}
case ISD::TRUNCATE:
switch (getTypeAction(Node->getOperand(0).getValueType())) {
case Legal:
Tmp1 = LegalizeOp(Node->getOperand(0));
if (Tmp1 != Node->getOperand(0))
Result = DAG.getNode(Node->getOpcode(), Node->getValueType(0), Tmp1);
break;
case Expand:
ExpandOp(Node->getOperand(0), Tmp1, Tmp2);
// Since the result is legal, we should just be able to truncate the low
// part of the source.
Result = DAG.getNode(ISD::TRUNCATE, Node->getValueType(0), Tmp1);
break;
case Promote:
Result = PromoteOp(Node->getOperand(0));
Result = DAG.getNode(ISD::TRUNCATE, Op.getValueType(), Result);
break;
}
break;
case ISD::FP_TO_SINT:
case ISD::FP_TO_UINT:
switch (getTypeAction(Node->getOperand(0).getValueType())) {
case Legal:
Tmp1 = LegalizeOp(Node->getOperand(0));
if (Tmp1 != Node->getOperand(0))
Result = DAG.getNode(Node->getOpcode(), Node->getValueType(0), Tmp1);
break;
case Expand:
assert(0 && "Shouldn't need to expand other operators here!");
case Promote:
Result = PromoteOp(Node->getOperand(0));
Result = DAG.getNode(Node->getOpcode(), Op.getValueType(), Result);
break;
}
break;
case ISD::ZERO_EXTEND:
case ISD::SIGN_EXTEND:
case ISD::FP_EXTEND:
case ISD::FP_ROUND:
switch (getTypeAction(Node->getOperand(0).getValueType())) {
case Legal:
Tmp1 = LegalizeOp(Node->getOperand(0));
if (Tmp1 != Node->getOperand(0))
Result = DAG.getNode(Node->getOpcode(), Node->getValueType(0), Tmp1);
break;
case Expand:
assert(0 && "Shouldn't need to expand other operators here!");
case Promote:
@ -1513,10 +1554,6 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
Result,
DAG.getValueType(Node->getOperand(0).getValueType()));
break;
case ISD::TRUNCATE:
Result = PromoteOp(Node->getOperand(0));
Result = DAG.getNode(ISD::TRUNCATE, Op.getValueType(), Result);
break;
case ISD::FP_EXTEND:
Result = PromoteOp(Node->getOperand(0));
if (Result.getValueType() != Op.getValueType())
@ -1524,24 +1561,9 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
Result = DAG.getNode(ISD::FP_EXTEND, Op.getValueType(), Result);
break;
case ISD::FP_ROUND:
case ISD::FP_TO_SINT:
case ISD::FP_TO_UINT:
Result = PromoteOp(Node->getOperand(0));
Result = DAG.getNode(Node->getOpcode(), Op.getValueType(), Result);
break;
case ISD::SINT_TO_FP:
Result = PromoteOp(Node->getOperand(0));
Result = DAG.getNode(ISD::SIGN_EXTEND_INREG, Result.getValueType(),
Result,
DAG.getValueType(Node->getOperand(0).getValueType()));
Result = DAG.getNode(ISD::SINT_TO_FP, Op.getValueType(), Result);
break;
case ISD::UINT_TO_FP:
Result = PromoteOp(Node->getOperand(0));
Result = DAG.getZeroExtendInReg(Result,
Node->getOperand(0).getValueType());
Result = DAG.getNode(ISD::UINT_TO_FP, Op.getValueType(), Result);
break;
}
}
break;