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legalize ANY_EXTEND appropriately

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23204 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-09-02 00:18:10 +00:00
parent 4ed11b4b79
commit 13c78e2e5f
1 changed files with 26 additions and 6 deletions
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32
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -1088,7 +1088,7 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
TLI.getTypeToPromoteTo(ISD::SELECT, Tmp2.getValueType());
unsigned ExtOp, TruncOp;
if (MVT::isInteger(Tmp2.getValueType())) {
ExtOp = ISD::ZERO_EXTEND;
ExtOp = ISD::ANY_EXTEND;
TruncOp = ISD::TRUNCATE;
} else {
ExtOp = ISD::FP_EXTEND;
@ -1866,6 +1866,7 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
}
break;
case ISD::ANY_EXTEND:
case ISD::ZERO_EXTEND:
case ISD::SIGN_EXTEND:
case ISD::FP_EXTEND:
@ -1881,17 +1882,19 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
case Promote:
switch (Node->getOpcode()) {
case ISD::ANY_EXTEND:
Result = PromoteOp(Node->getOperand(0));
Result = DAG.getNode(ISD::ANY_EXTEND, Op.getValueType(), Result);
break;
case ISD::ZERO_EXTEND:
Result = PromoteOp(Node->getOperand(0));
// NOTE: Any extend would work here...
Result = DAG.getNode(ISD::ZERO_EXTEND, Op.getValueType(), Result);
Result = DAG.getNode(ISD::ANY_EXTEND, Op.getValueType(), Result);
Result = DAG.getZeroExtendInReg(Result,
Node->getOperand(0).getValueType());
break;
case ISD::SIGN_EXTEND:
Result = PromoteOp(Node->getOperand(0));
// NOTE: Any extend would work here...
Result = DAG.getNode(ISD::ZERO_EXTEND, Op.getValueType(), Result);
Result = DAG.getNode(ISD::ANY_EXTEND, Op.getValueType(), Result);
Result = DAG.getNode(ISD::SIGN_EXTEND_INREG, Result.getValueType(),
Result,
DAG.getValueType(Node->getOperand(0).getValueType()));
@ -2051,6 +2054,7 @@ SDOperand SelectionDAGLegalize::PromoteOp(SDOperand Op) {
break;
case ISD::SIGN_EXTEND:
case ISD::ZERO_EXTEND:
case ISD::ANY_EXTEND:
switch (getTypeAction(Node->getOperand(0).getValueType())) {
case Expand: assert(0 && "BUG: Smaller reg should have been promoted!");
case Legal:
@ -2065,7 +2069,7 @@ SDOperand SelectionDAGLegalize::PromoteOp(SDOperand Op) {
if (Node->getOpcode() == ISD::SIGN_EXTEND)
Result = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Result,
DAG.getValueType(Node->getOperand(0).getValueType()));
else
else if (Node->getOpcode() == ISD::ZERO_EXTEND)
Result = DAG.getZeroExtendInReg(Result,
Node->getOperand(0).getValueType());
break;
@ -3010,6 +3014,22 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
Hi = LegalizeOp(Hi);
break;
}
case ISD::ANY_EXTEND: {
SDOperand In;
switch (getTypeAction(Node->getOperand(0).getValueType())) {
case Expand: assert(0 && "expand-expand not implemented yet!");
case Legal: In = LegalizeOp(Node->getOperand(0)); break;
case Promote:
In = PromoteOp(Node->getOperand(0));
break;
}
// The low part is any extension of the input (which degenerates to a copy).
Lo = DAG.getNode(ISD::ANY_EXTEND, NVT, In);
// The high part is undefined.
Hi = DAG.getNode(ISD::UNDEF, NVT);
break;
}
case ISD::SIGN_EXTEND: {
SDOperand In;
switch (getTypeAction(Node->getOperand(0).getValueType())) {