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Add support for calls that pass and return legal vectors.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28340 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-05-16 23:39:44 +00:00
parent abde460d4f
commit da098e7d10
1 changed files with 60 additions and 3 deletions
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63
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
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@ -2470,6 +2470,7 @@ TargetLowering::LowerArguments(Function &F, SelectionDAG &DAG) {
Ops.push_back(N);
} else {
assert(0 && "Don't support illegal by-val vector arguments yet!");
abort();
}
}
break;
@ -2537,7 +2538,26 @@ TargetLowering::LowerCallTo(SDOperand Chain, const Type *RetTy, bool isVarArg,
assert(0 && "Cannot expand i64 -> i16 yet!");
}
} else {
assert(0 && "Doesn't handle vectors yet!");
// Otherwise, this is a vector type. We only support legal vectors
// right now.
const PackedType *PTy = cast<PackedType>(Args[i].second);
unsigned NumElems = PTy->getNumElements();
const Type *EltTy = PTy->getElementType();
// Figure out if there is a Packed type corresponding to this Vector
// type. If so, convert to the packed type.
MVT::ValueType TVT = MVT::getVectorType(getValueType(EltTy), NumElems);
if (TVT != MVT::Other && isTypeLegal(TVT)) {
// Handle copies from generic vectors to registers.
MVT::ValueType PTyElementVT, PTyLegalElementVT;
unsigned NE = getPackedTypeBreakdown(PTy, PTyElementVT,
PTyLegalElementVT);
// Insert a VBIT_CONVERT of the MVT::Vector type to the packed type.
Ops.push_back(DAG.getNode(ISD::VBIT_CONVERT, TVT, Op));
} else {
assert(0 && "Don't support illegal by-val vector call args yet!");
abort();
}
}
break;
}
@ -2566,7 +2586,21 @@ TargetLowering::LowerCallTo(SDOperand Chain, const Type *RetTy, bool isVarArg,
for (unsigned i = 0; i != NumVals; ++i)
RetTys.push_back(NVT);
} else {
assert(0 && "Doesn't handle vectors yet!");
// Otherwise, this is a vector type. We only support legal vectors
// right now.
const PackedType *PTy = cast<PackedType>(RetTy);
unsigned NumElems = PTy->getNumElements();
const Type *EltTy = PTy->getElementType();
// Figure out if there is a Packed type corresponding to this Vector
// type. If so, convert to the packed type.
MVT::ValueType TVT = MVT::getVectorType(getValueType(EltTy), NumElems);
if (TVT != MVT::Other && isTypeLegal(TVT)) {
RetTys.push_back(TVT);
} else {
assert(0 && "Don't support illegal by-val vector call results yet!");
abort();
}
}
}
}
@ -2587,7 +2621,30 @@ TargetLowering::LowerCallTo(SDOperand Chain, const Type *RetTy, bool isVarArg,
// If this value was promoted, truncate it down.
if (ResVal.getValueType() != VT) {
if (MVT::isInteger(VT)) {
if (VT == MVT::Vector) {
// Insert a VBITCONVERT to convert from the packed result type to the
// MVT::Vector type.
unsigned NumElems = cast<PackedType>(RetTy)->getNumElements();
const Type *EltTy = cast<PackedType>(RetTy)->getElementType();
// Figure out if there is a Packed type corresponding to this Vector
// type. If so, convert to the packed type.
MVT::ValueType TVT = MVT::getVectorType(getValueType(EltTy), NumElems);
if (TVT != MVT::Other && isTypeLegal(TVT)) {
// Handle copies from generic vectors to registers.
MVT::ValueType PTyElementVT, PTyLegalElementVT;
unsigned NE = getPackedTypeBreakdown(cast<PackedType>(RetTy),
PTyElementVT,
PTyLegalElementVT);
// Insert a VBIT_CONVERT of the FORMAL_ARGUMENTS to a
// "N x PTyElementVT" MVT::Vector type.
ResVal = DAG.getNode(ISD::VBIT_CONVERT, MVT::Vector, ResVal,
DAG.getConstant(NE, MVT::i32),
DAG.getValueType(PTyElementVT));
} else {
abort();
}
} else if (MVT::isInteger(VT)) {
unsigned AssertOp = RetTy->isSigned() ?
ISD::AssertSext : ISD::AssertZext;
ResVal = DAG.getNode(AssertOp, ResVal.getValueType(), ResVal,