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Propagate alignment/volatility in two places.

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Implement support for expanding a bitcast from an illegal vector type to
a legal one (e.g. 4xi32 -> 4xf32 in SSE1).  This fixes PR1371 and
CodeGen/X86/2007-05-05-VecCastExpand.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36787 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-05-05 19:39:05 +00:00
parent 09d933fdbd
commit b464c44679
1 changed files with 16 additions and 4 deletions
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20
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -1881,7 +1881,8 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
}
Lo = DAG.getStore(Tmp1, Lo, Tmp2, ST->getSrcValue(),
ST->getSrcValueOffset());
ST->getSrcValueOffset(), ST->isVolatile(),
ST->getAlignment());
if (Hi.Val == NULL) {
// Must be int <-> float one-to-one expansion.
@ -1896,7 +1897,8 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
// FIXME: This sets the srcvalue of both halves to be the same, which is
// wrong.
Hi = DAG.getStore(Tmp1, Hi, Tmp2, ST->getSrcValue(),
ST->getSrcValueOffset());
ST->getSrcValueOffset(), ST->isVolatile(),
std::min(ST->getAlignment(), IncrementSize));
Result = DAG.getNode(ISD::TokenFactor, MVT::Other, Lo, Hi);
break;
}
@ -5667,8 +5669,18 @@ SDOperand SelectionDAGLegalize::PackVectorOp(SDOperand Op,
PackVectorOp(Node->getOperand(0), EVT));
break;
} else {
// FIXME: UNIMP!
assert(0 && "Cast from unsupported vector type not implemented yet!");
// If the input vector type isn't legal, then go through memory.
SDOperand Ptr = CreateStackTemporary(NewVT);
// Get the alignment for the store.
const TargetData &TD = *TLI.getTargetData();
unsigned Align =
TD.getABITypeAlignment(MVT::getTypeForValueType(NewVT));
SDOperand St = DAG.getStore(DAG.getEntryNode(),
Node->getOperand(0), Ptr, NULL, 0, false,
Align);
Result = DAG.getLoad(NewVT, St, Ptr, 0, 0);
break;
}
}
break;