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AMDGPU/R600: Remove MergeVectorStores from legalization

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This is handled by DAGCombiner in a more generic way

Differential Revision: https://reviews.llvm.org/D23970

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@280019 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jan Vesely 2016-08-29 22:05:06 +00:00
parent 55a983f6cd
commit 79944cc240
3 changed files with 0 additions and 65 deletions
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59
lib/Target/AMDGPU/AMDGPUISelLowering.cpp
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@ -980,65 +980,6 @@ SDValue AMDGPUTargetLowering::SplitVectorLoad(const SDValue Op,
return DAG.getMergeValues(Ops, SL);
}
// FIXME: This isn't doing anything for SI. This should be used in a target
// combine during type legalization.
SDValue AMDGPUTargetLowering::MergeVectorStore(const SDValue &Op,
SelectionDAG &DAG) const {
StoreSDNode *Store = cast<StoreSDNode>(Op);
EVT MemVT = Store->getMemoryVT();
unsigned MemBits = MemVT.getSizeInBits();
// Byte stores are really expensive, so if possible, try to pack 32-bit vector
// truncating store into an i32 store.
// XXX: We could also handle optimize other vector bitwidths.
if (!MemVT.isVector() || MemBits > 32) {
return SDValue();
}
SDLoc DL(Op);
SDValue Value = Store->getValue();
EVT VT = Value.getValueType();
EVT ElemVT = VT.getVectorElementType();
SDValue Ptr = Store->getBasePtr();
EVT MemEltVT = MemVT.getVectorElementType();
unsigned MemEltBits = MemEltVT.getSizeInBits();
unsigned MemNumElements = MemVT.getVectorNumElements();
unsigned PackedSize = MemVT.getStoreSizeInBits();
SDValue Mask = DAG.getConstant((1 << MemEltBits) - 1, DL, MVT::i32);
assert(Value.getValueType().getScalarSizeInBits() >= 32);
SDValue PackedValue;
for (unsigned i = 0; i < MemNumElements; ++i) {
SDValue Elt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, ElemVT, Value,
DAG.getConstant(i, DL, MVT::i32));
Elt = DAG.getZExtOrTrunc(Elt, DL, MVT::i32);
Elt = DAG.getNode(ISD::AND, DL, MVT::i32, Elt, Mask); // getZeroExtendInReg
SDValue Shift = DAG.getConstant(MemEltBits * i, DL, MVT::i32);
Elt = DAG.getNode(ISD::SHL, DL, MVT::i32, Elt, Shift);
if (i == 0) {
PackedValue = Elt;
} else {
PackedValue = DAG.getNode(ISD::OR, DL, MVT::i32, PackedValue, Elt);
}
}
if (PackedSize < 32) {
EVT PackedVT = EVT::getIntegerVT(*DAG.getContext(), PackedSize);
return DAG.getTruncStore(Store->getChain(), DL, PackedValue, Ptr,
Store->getMemOperand()->getPointerInfo(), PackedVT,
Store->getAlignment(),
Store->getMemOperand()->getFlags());
}
return DAG.getStore(Store->getChain(), DL, PackedValue, Ptr,
Store->getMemOperand()->getPointerInfo(),
Store->getAlignment(),
Store->getMemOperand()->getFlags());
}
SDValue AMDGPUTargetLowering::SplitVectorStore(SDValue Op,
SelectionDAG &DAG) const {
StoreSDNode *Store = cast<StoreSDNode>(Op);

3
lib/Target/AMDGPU/AMDGPUISelLowering.h
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@ -31,9 +31,6 @@ protected:
SDValue LowerEXTRACT_SUBVECTOR(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const;
/// \brief Lower vector stores by merging the vector elements into an integer
/// of the same bitwidth.
SDValue MergeVectorStore(const SDValue &Op, SelectionDAG &DAG) const;
/// \brief Split a vector store into multiple scalar stores.
/// \returns The resulting chain.

3
lib/Target/AMDGPU/R600ISelLowering.cpp
View File

@ -1116,9 +1116,6 @@ SDValue R600TargetLowering::lowerPrivateTruncStore(StoreSDNode *Store,
}
SDValue R600TargetLowering::LowerSTORE(SDValue Op, SelectionDAG &DAG) const {
if (SDValue Result = AMDGPUTargetLowering::MergeVectorStore(Op, DAG))
return Result;
StoreSDNode *StoreNode = cast<StoreSDNode>(Op);
unsigned AS = StoreNode->getAddressSpace();
SDValue Value = StoreNode->getValue();