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LegalizeTypes support for INSERT_VECTOR_ELT with

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a non-constant index.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52292 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands 2008-06-15 20:00:14 +00:00
parent 8a08769bad
commit 7d0d846064
3 changed files with 59 additions and 26 deletions
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17
lib/CodeGen/SelectionDAG/LegalizeTypes.cpp
View File

@ -577,6 +577,23 @@ SDOperand DAGTypeLegalizer::MakeLibCall(RTLIB::Libcall LC, MVT RetVT,
return CallInfo.first;
}
SDOperand DAGTypeLegalizer::GetVectorElementPointer(SDOperand VecPtr, MVT EltVT,
SDOperand Index) {
// Make sure the index type is big enough to compute in.
if (Index.getValueType().bitsGT(TLI.getPointerTy()))
Index = DAG.getNode(ISD::TRUNCATE, TLI.getPointerTy(), Index);
else
Index = DAG.getNode(ISD::ZERO_EXTEND, TLI.getPointerTy(), Index);
// Calculate the element offset and add it to the pointer.
unsigned EltSize = EltVT.getSizeInBits() / 8; // FIXME: should be ABI size.
Index = DAG.getNode(ISD::MUL, Index.getValueType(), Index,
DAG.getConstant(EltSize, Index.getValueType()));
return DAG.getNode(ISD::ADD, Index.getValueType(), Index, VecPtr);
}
//===----------------------------------------------------------------------===//
// Entry Point
//===----------------------------------------------------------------------===//

10
lib/CodeGen/SelectionDAG/LegalizeTypes.h
View File

@ -169,14 +169,18 @@ private:
void ExpungeNode(SDOperand N);
// Common routines.
SDOperand BitConvertToInteger(SDOperand Op);
SDOperand CreateStackStoreLoad(SDOperand Op, MVT DestVT);
SDOperand MakeLibCall(RTLIB::Libcall LC, MVT RetVT,
const SDOperand *Ops, unsigned NumOps, bool isSigned);
SDOperand BitConvertToInteger(SDOperand Op);
SDOperand JoinIntegers(SDOperand Lo, SDOperand Hi);
void SplitInteger(SDOperand Op, SDOperand &Lo, SDOperand &Hi);
void SplitInteger(SDOperand Op, MVT LoVT, MVT HiVT,
SDOperand &Lo, SDOperand &Hi);
SDOperand MakeLibCall(RTLIB::Libcall LC, MVT RetVT,
const SDOperand *Ops, unsigned NumOps, bool isSigned);
SDOperand GetVectorElementPointer(SDOperand VecPtr, MVT EltVT,
SDOperand Index);
//===--------------------------------------------------------------------===//
// Promotion Support: LegalizeTypesPromote.cpp

58
lib/CodeGen/SelectionDAG/LegalizeTypesSplit.cpp
View File

@ -162,16 +162,37 @@ void DAGTypeLegalizer::SplitRes_BUILD_PAIR(SDNode *N, SDOperand &Lo,
void DAGTypeLegalizer::SplitRes_INSERT_VECTOR_ELT(SDNode *N, SDOperand &Lo,
SDOperand &Hi) {
GetSplitOp(N->getOperand(0), Lo, Hi);
unsigned Index = cast<ConstantSDNode>(N->getOperand(2))->getValue();
SDOperand ScalarOp = N->getOperand(1);
unsigned LoNumElts = Lo.getValueType().getVectorNumElements();
if (Index < LoNumElts)
Lo = DAG.getNode(ISD::INSERT_VECTOR_ELT, Lo.getValueType(), Lo, ScalarOp,
N->getOperand(2));
else
Hi = DAG.getNode(ISD::INSERT_VECTOR_ELT, Hi.getValueType(), Hi, ScalarOp,
DAG.getIntPtrConstant(Index - LoNumElts));
SDOperand Vec = N->getOperand(0);
SDOperand Elt = N->getOperand(1);
SDOperand Idx = N->getOperand(2);
GetSplitOp(Vec, Lo, Hi);
if (ConstantSDNode *CIdx = dyn_cast<ConstantSDNode>(Idx)) {
unsigned IdxVal = CIdx->getValue();
unsigned LoNumElts = Lo.getValueType().getVectorNumElements();
if (IdxVal < LoNumElts)
Lo = DAG.getNode(ISD::INSERT_VECTOR_ELT, Lo.getValueType(), Lo, Elt, Idx);
else
Hi = DAG.getNode(ISD::INSERT_VECTOR_ELT, Hi.getValueType(), Hi, Elt,
DAG.getIntPtrConstant(IdxVal - LoNumElts));
return;
}
// Spill the vector to the stack.
MVT VecVT = Vec.getValueType();
SDOperand StackPtr = DAG.CreateStackTemporary(VecVT);
SDOperand Store = DAG.getStore(DAG.getEntryNode(), Vec, StackPtr, NULL, 0);
// Store the new element.
SDOperand EltPtr = GetVectorElementPointer(StackPtr,
VecVT.getVectorElementType(), Idx);
Store = DAG.getStore(Store, Elt, EltPtr, NULL, 0);
// Reload the vector from the stack.
SDOperand Load = DAG.getLoad(VecVT, Store, StackPtr, NULL, 0);
// Split it.
SplitRes_LOAD(cast<LoadSDNode>(Load.Val), Lo, Hi);
}
void DAGTypeLegalizer::SplitRes_VECTOR_SHUFFLE(SDNode *N,
@ -473,22 +494,13 @@ SDOperand DAGTypeLegalizer::SplitOp_EXTRACT_VECTOR_ELT(SDNode *N) {
Idx.getValueType()));
}
// Store the vector to the stack and load back the required element.
// Store the vector to the stack.
MVT EltVT = VecVT.getVectorElementType();
SDOperand StackPtr = DAG.CreateStackTemporary(VecVT);
SDOperand Store = DAG.getStore(DAG.getEntryNode(), Vec, StackPtr, NULL, 0);
// Add the offset to the index.
MVT EltVT = VecVT.getVectorElementType();
unsigned EltSize = EltVT.getSizeInBits()/8; // FIXME: should be ABI size.
Idx = DAG.getNode(ISD::MUL, Idx.getValueType(), Idx,
DAG.getConstant(EltSize, Idx.getValueType()));
if (Idx.getValueType().bitsGT(TLI.getPointerTy()))
Idx = DAG.getNode(ISD::TRUNCATE, TLI.getPointerTy(), Idx);
else
Idx = DAG.getNode(ISD::ZERO_EXTEND, TLI.getPointerTy(), Idx);
StackPtr = DAG.getNode(ISD::ADD, Idx.getValueType(), Idx, StackPtr);
// Load back the required element.
StackPtr = GetVectorElementPointer(StackPtr, EltVT, Idx);
return DAG.getLoad(EltVT, Store, StackPtr, NULL, 0);
}