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Add support for CopyFromReg from vector values. Note: this doesn't support

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illegal vector types yet!

llvm-svn: 26799
This commit is contained in:
Chris Lattner 2006-03-16 19:57:50 +00:00
parent 34f2e70f60
commit 413bb13b27
1 changed files with 119 additions and 104 deletions
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223
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
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@ -400,110 +400,7 @@ public:
return DAG.getConstant(Val, TLI.getPointerTy());
}
SDOperand getValue(const Value *V) {
SDOperand &N = NodeMap[V];
if (N.Val) return N;
const Type *VTy = V->getType();
MVT::ValueType VT = TLI.getValueType(VTy);
if (Constant *C = const_cast<Constant*>(dyn_cast<Constant>(V)))
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
visit(CE->getOpcode(), *CE);
assert(N.Val && "visit didn't populate the ValueMap!");
return N;
} else if (GlobalValue *GV = dyn_cast<GlobalValue>(C)) {
return N = DAG.getGlobalAddress(GV, VT);
} else if (isa<ConstantPointerNull>(C)) {
return N = DAG.getConstant(0, TLI.getPointerTy());
} else if (isa<UndefValue>(C)) {
return N = DAG.getNode(ISD::UNDEF, VT);
} else if (ConstantFP *CFP = dyn_cast<ConstantFP>(C)) {
return N = DAG.getConstantFP(CFP->getValue(), VT);
} else if (const PackedType *PTy = dyn_cast<PackedType>(VTy)) {
unsigned NumElements = PTy->getNumElements();
MVT::ValueType PVT = TLI.getValueType(PTy->getElementType());
MVT::ValueType TVT = MVT::getVectorType(PVT, NumElements);
// Now that we know the number and type of the elements, push a
// Constant or ConstantFP node onto the ops list for each element of
// the packed constant.
std::vector<SDOperand> Ops;
if (ConstantPacked *CP = dyn_cast<ConstantPacked>(C)) {
if (MVT::isFloatingPoint(PVT)) {
for (unsigned i = 0; i != NumElements; ++i) {
const ConstantFP *El = cast<ConstantFP>(CP->getOperand(i));
Ops.push_back(DAG.getConstantFP(El->getValue(), PVT));
}
} else {
for (unsigned i = 0; i != NumElements; ++i) {
const ConstantIntegral *El =
cast<ConstantIntegral>(CP->getOperand(i));
Ops.push_back(DAG.getConstant(El->getRawValue(), PVT));
}
}
} else {
assert(isa<ConstantAggregateZero>(C) && "Unknown packed constant!");
SDOperand Op;
if (MVT::isFloatingPoint(PVT))
Op = DAG.getConstantFP(0, PVT);
else
Op = DAG.getConstant(0, PVT);
Ops.assign(NumElements, Op);
}
// Handle the case where we have a 1-element vector, in which
// case we want to immediately turn it into a scalar constant.
if (Ops.size() == 1) {
return N = Ops[0];
} else if (TVT != MVT::Other && TLI.isTypeLegal(TVT)) {
return N = DAG.getNode(ISD::ConstantVec, TVT, Ops);
} else {
// If the packed type isn't legal, then create a ConstantVec node with
// generic Vector type instead.
SDOperand Num = DAG.getConstant(NumElements, MVT::i32);
SDOperand Typ = DAG.getValueType(PVT);
Ops.insert(Ops.begin(), Typ);
Ops.insert(Ops.begin(), Num);
return N = DAG.getNode(ISD::VConstant, MVT::Vector, Ops);
}
} else {
// Canonicalize all constant ints to be unsigned.
return N = DAG.getConstant(cast<ConstantIntegral>(C)->getRawValue(),VT);
}
if (const AllocaInst *AI = dyn_cast<AllocaInst>(V)) {
std::map<const AllocaInst*, int>::iterator SI =
FuncInfo.StaticAllocaMap.find(AI);
if (SI != FuncInfo.StaticAllocaMap.end())
return DAG.getFrameIndex(SI->second, TLI.getPointerTy());
}
std::map<const Value*, unsigned>::const_iterator VMI =
FuncInfo.ValueMap.find(V);
assert(VMI != FuncInfo.ValueMap.end() && "Value not in map!");
unsigned InReg = VMI->second;
// If this type is not legal, make it so now.
MVT::ValueType DestVT = TLI.getTypeToTransformTo(VT);
N = DAG.getCopyFromReg(DAG.getEntryNode(), InReg, DestVT);
if (DestVT < VT) {
// Source must be expanded. This input value is actually coming from the
// register pair VMI->second and VMI->second+1.
N = DAG.getNode(ISD::BUILD_PAIR, VT, N,
DAG.getCopyFromReg(DAG.getEntryNode(), InReg+1, DestVT));
} else {
if (DestVT > VT) { // Promotion case
if (MVT::isFloatingPoint(VT))
N = DAG.getNode(ISD::FP_ROUND, VT, N);
else
N = DAG.getNode(ISD::TRUNCATE, VT, N);
}
}
return N;
}
SDOperand getValue(const Value *V);
const SDOperand &setValue(const Value *V, SDOperand NewN) {
SDOperand &N = NodeMap[V];
@ -599,6 +496,124 @@ public:
};
} // end namespace llvm
SDOperand SelectionDAGLowering::getValue(const Value *V) {
SDOperand &N = NodeMap[V];
if (N.Val) return N;
const Type *VTy = V->getType();
MVT::ValueType VT = TLI.getValueType(VTy);
if (Constant *C = const_cast<Constant*>(dyn_cast<Constant>(V))) {
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
visit(CE->getOpcode(), *CE);
assert(N.Val && "visit didn't populate the ValueMap!");
return N;
} else if (GlobalValue *GV = dyn_cast<GlobalValue>(C)) {
return N = DAG.getGlobalAddress(GV, VT);
} else if (isa<ConstantPointerNull>(C)) {
return N = DAG.getConstant(0, TLI.getPointerTy());
} else if (isa<UndefValue>(C)) {
return N = DAG.getNode(ISD::UNDEF, VT);
} else if (ConstantFP *CFP = dyn_cast<ConstantFP>(C)) {
return N = DAG.getConstantFP(CFP->getValue(), VT);
} else if (const PackedType *PTy = dyn_cast<PackedType>(VTy)) {
unsigned NumElements = PTy->getNumElements();
MVT::ValueType PVT = TLI.getValueType(PTy->getElementType());
MVT::ValueType TVT = MVT::getVectorType(PVT, NumElements);
// Now that we know the number and type of the elements, push a
// Constant or ConstantFP node onto the ops list for each element of
// the packed constant.
std::vector<SDOperand> Ops;
if (ConstantPacked *CP = dyn_cast<ConstantPacked>(C)) {
if (MVT::isFloatingPoint(PVT)) {
for (unsigned i = 0; i != NumElements; ++i) {
const ConstantFP *El = cast<ConstantFP>(CP->getOperand(i));
Ops.push_back(DAG.getConstantFP(El->getValue(), PVT));
}
} else {
for (unsigned i = 0; i != NumElements; ++i) {
const ConstantIntegral *El =
cast<ConstantIntegral>(CP->getOperand(i));
Ops.push_back(DAG.getConstant(El->getRawValue(), PVT));
}
}
} else {
assert(isa<ConstantAggregateZero>(C) && "Unknown packed constant!");
SDOperand Op;
if (MVT::isFloatingPoint(PVT))
Op = DAG.getConstantFP(0, PVT);
else
Op = DAG.getConstant(0, PVT);
Ops.assign(NumElements, Op);
}
// Handle the case where we have a 1-element vector, in which
// case we want to immediately turn it into a scalar constant.
if (Ops.size() == 1) {
return N = Ops[0];
} else if (TVT != MVT::Other && TLI.isTypeLegal(TVT)) {
return N = DAG.getNode(ISD::ConstantVec, TVT, Ops);
} else {
// If the packed type isn't legal, then create a ConstantVec node with
// generic Vector type instead.
SDOperand Num = DAG.getConstant(NumElements, MVT::i32);
SDOperand Typ = DAG.getValueType(PVT);
Ops.insert(Ops.begin(), Typ);
Ops.insert(Ops.begin(), Num);
return N = DAG.getNode(ISD::VConstant, MVT::Vector, Ops);
}
} else {
// Canonicalize all constant ints to be unsigned.
return N = DAG.getConstant(cast<ConstantIntegral>(C)->getRawValue(),VT);
}
}
if (const AllocaInst *AI = dyn_cast<AllocaInst>(V)) {
std::map<const AllocaInst*, int>::iterator SI =
FuncInfo.StaticAllocaMap.find(AI);
if (SI != FuncInfo.StaticAllocaMap.end())
return DAG.getFrameIndex(SI->second, TLI.getPointerTy());
}
std::map<const Value*, unsigned>::const_iterator VMI =
FuncInfo.ValueMap.find(V);
assert(VMI != FuncInfo.ValueMap.end() && "Value not in map!");
unsigned InReg = VMI->second;
// If this type is not legal, make it so now.
if (VT == MVT::Vector) {
// FIXME: We only handle legal vectors right now. We need a VBUILD_VECTOR
const PackedType *PTy = cast<PackedType>(VTy);
unsigned NumElements = PTy->getNumElements();
MVT::ValueType PVT = TLI.getValueType(PTy->getElementType());
MVT::ValueType TVT = MVT::getVectorType(PVT, NumElements);
assert(TLI.isTypeLegal(TVT) &&
"FIXME: Cannot handle illegal vector types here yet!");
VT = TVT;
}
MVT::ValueType DestVT = TLI.getTypeToTransformTo(VT);
N = DAG.getCopyFromReg(DAG.getEntryNode(), InReg, DestVT);
if (DestVT < VT) {
// Source must be expanded. This input value is actually coming from the
// register pair VMI->second and VMI->second+1.
N = DAG.getNode(ISD::BUILD_PAIR, VT, N,
DAG.getCopyFromReg(DAG.getEntryNode(), InReg+1, DestVT));
} else {
if (DestVT > VT) { // Promotion case
if (MVT::isFloatingPoint(VT))
N = DAG.getNode(ISD::FP_ROUND, VT, N);
else
N = DAG.getNode(ISD::TRUNCATE, VT, N);
}
}
return N;
}
void SelectionDAGLowering::visitRet(ReturnInst &I) {
if (I.getNumOperands() == 0) {
DAG.setRoot(DAG.getNode(ISD::RET, MVT::Other, getRoot()));