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allow custom lowering to return null for legal results 

llvm-svn: 25007
This commit is contained in:
Andrew Lenharth 2005-12-25 01:07:37 +00:00
parent 7259426d88
commit 30db2ec59f
1 changed files with 15 additions and 17 deletions
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32
llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -1956,11 +1956,6 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
break;
}
switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
case TargetLowering::Legal:
if (Tmp1 != Node->getOperand(0) ||
Tmp2 != Node->getOperand(1))
Result = DAG.getNode(Node->getOpcode(), Node->getValueType(0), Tmp1,Tmp2);
break;
case TargetLowering::Custom: {
Result = DAG.getNode(Node->getOpcode(), Node->getValueType(0), Tmp1, Tmp2);
SDOperand Tmp = TLI.LowerOperation(Result, DAG);
@ -1968,9 +1963,13 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
Tmp = LegalizeOp(Tmp); // Relegalize input.
AddLegalizedOperand(Op, Tmp);
return Tmp;
}
break;
} //else it was considered legal and we fall through
}
case TargetLowering::Legal:
if (Tmp1 != Node->getOperand(0) ||
Tmp2 != Node->getOperand(1))
Result = DAG.getNode(Node->getOpcode(), Node->getValueType(0), Tmp1,Tmp2);
break;
default:
assert(0 && "Operation not supported");
}
@ -2007,6 +2006,15 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
Tmp1 = LegalizeOp(Node->getOperand(0)); // LHS
Tmp2 = LegalizeOp(Node->getOperand(1)); // RHS
switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
case TargetLowering::Custom: {
Result = DAG.getNode(Node->getOpcode(), Node->getValueType(0), Tmp1, Tmp2);
SDOperand Tmp = TLI.LowerOperation(Result, DAG);
if (Tmp.Val) {
Tmp = LegalizeOp(Tmp); // Relegalize input.
AddLegalizedOperand(Op, Tmp);
return Tmp;
} //else it was considered legal and we fall through
}
case TargetLowering::Legal:
if (Tmp1 != Node->getOperand(0) ||
Tmp2 != Node->getOperand(1))
@ -2015,16 +2023,6 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
break;
case TargetLowering::Promote:
assert(0 && "Cannot promote handle this yet!");
case TargetLowering::Custom: {
Result = DAG.getNode(Node->getOpcode(), Node->getValueType(0), Tmp1, Tmp2);
SDOperand Tmp = TLI.LowerOperation(Result, DAG);
if (Tmp.Val) {
Tmp = LegalizeOp(Tmp); // Relegalize input.
AddLegalizedOperand(Op, Tmp);
return Tmp;
}
break;
}
case TargetLowering::Expand:
if (MVT::isInteger(Node->getValueType(0))) {
MVT::ValueType VT = Node->getValueType(0);