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Implement support for long GEP indices on 32-bit archs and support for 

int GEP indices on 64-bit archs.

llvm-svn: 19354
This commit is contained in:
Chris Lattner 2005-01-07 21:56:57 +00:00
parent 4d5ba99283
commit 19a83990e1
2 changed files with 15 additions and 3 deletions
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1
llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
View File

@ -529,6 +529,7 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
break;
case ISD::ZERO_EXTEND:
case ISD::SIGN_EXTEND:
case ISD::TRUNCATE:
case ISD::FP_EXTEND:
case ISD::FP_ROUND:
switch (getTypeAction(Node->getOperand(0).getValueType())) {

17
llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
View File

@ -477,9 +477,20 @@ void SelectionDAGLowering::visitGetElementPtr(User &I) {
if (!isa<Constant>(Idx) || !cast<Constant>(Idx)->isNullValue()) {
// N = N + Idx * ElementSize;
uint64_t ElementSize = TD.getTypeSize(Ty);
SDOperand IdxN = getValue(Idx);
IdxN = DAG.getNode(ISD::MUL, N.getValueType(), IdxN,
getIntPtrConstant(ElementSize));
SDOperand IdxN = getValue(Idx), Scale = getIntPtrConstant(ElementSize);
// If the index is smaller or larger than intptr_t, truncate or extend
// it.
if (IdxN.getValueType() < Scale.getValueType()) {
if (Idx->getType()->isSigned())
IdxN = DAG.getNode(ISD::SIGN_EXTEND, Scale.getValueType(), IdxN);
else
IdxN = DAG.getNode(ISD::ZERO_EXTEND, Scale.getValueType(), IdxN);
} else if (IdxN.getValueType() > Scale.getValueType())
IdxN = DAG.getNode(ISD::TRUNCATE, Scale.getValueType(), IdxN);
IdxN = DAG.getNode(ISD::MUL, N.getValueType(), IdxN, Scale);
N = DAG.getNode(ISD::ADD, N.getValueType(), N, IdxN);
}
}