LLVM: llvm::BuildVectorSDNode Class Reference (original) (raw)
A "pseudo-class" with methods for operating on BUILD_VECTORs. More...
#include "[llvm/CodeGen/SelectionDAGNodes.h](SelectionDAGNodes%5F8h%5Fsource.html)"
| Public Member Functions | |
|---|---|
| BuildVectorSDNode ()=delete | |
| bool | isConstantSplat (APInt &SplatValue, APInt &SplatUndef, unsigned &SplatBitSize, bool &HasAnyUndefs, unsigned MinSplatBits=0, bool isBigEndian=false) const |
| Check if this is a constant splat, and if so, find the smallest element size that splats the vector. | |
| SDValue | getSplatValue (const APInt &DemandedElts, BitVector *UndefElements=nullptr) const |
| Returns the demanded splatted value or a null value if this is not a splat. | |
| SDValue | getSplatValue (BitVector *UndefElements=nullptr) const |
| Returns the splatted value or a null value if this is not a splat. | |
| bool | getRepeatedSequence (const APInt &DemandedElts, SmallVectorImpl< SDValue > &Sequence, BitVector *UndefElements=nullptr) const |
| Find the shortest repeating sequence of values in the build vector. | |
| bool | getRepeatedSequence (SmallVectorImpl< SDValue > &Sequence, BitVector *UndefElements=nullptr) const |
| Find the shortest repeating sequence of values in the build vector. | |
| ConstantSDNode * | getConstantSplatNode (const APInt &DemandedElts, BitVector *UndefElements=nullptr) const |
| Returns the demanded splatted constant or null if this is not a constant splat. | |
| ConstantSDNode * | getConstantSplatNode (BitVector *UndefElements=nullptr) const |
| Returns the splatted constant or null if this is not a constant splat. | |
| ConstantFPSDNode * | getConstantFPSplatNode (const APInt &DemandedElts, BitVector *UndefElements=nullptr) const |
| Returns the demanded splatted constant FP or null if this is not a constant FP splat. | |
| ConstantFPSDNode * | getConstantFPSplatNode (BitVector *UndefElements=nullptr) const |
| Returns the splatted constant FP or null if this is not a constant FP splat. | |
| int32_t | getConstantFPSplatPow2ToLog2Int (BitVector *UndefElements, uint32_t BitWidth) const |
| If this is a constant FP splat and the splatted constant FP is an exact power or 2, return the log base 2 integer value. | |
| bool | getConstantRawBits (bool IsLittleEndian, unsigned DstEltSizeInBits, SmallVectorImpl< APInt > &RawBitElements, BitVector &UndefElements) const |
| Extract the raw bit data from a build vector of Undef, Constant or ConstantFP node elements. | |
| bool | isConstant () const |
| std::optional< std::pair< APInt, APInt > > | isConstantSequence () const |
| If this BuildVector is constant and represents the numerical series "<a, a+n, a+2n, a+3n, ...>" where a is integer and n is a non-zero integer, the value "<a,n>" is returned. | |
 Public Member Functions inherited from llvm::SDNode |
|
| unsigned | getOpcode () const |
| Return the SelectionDAG opcode value for this node. | |
| bool | isTargetOpcode () const |
| Test if this node has a target-specific opcode (in the ISD namespace). | |
| bool | isUndef () const |
| Return true if the type of the node type undefined. | |
| bool | isMemIntrinsic () const |
| Test if this node is a memory intrinsic (with valid pointer information). | |
| bool | isStrictFPOpcode () |
| Test if this node is a strict floating point pseudo-op. | |
| bool | isVPOpcode () const |
| Test if this node is a vector predication operation. | |
| bool | isMachineOpcode () const |
| Test if this node has a post-isel opcode, directly corresponding to a MachineInstr opcode. | |
| unsigned | getMachineOpcode () const |
| This may only be called if isMachineOpcode returns true. | |
| bool | getHasDebugValue () const |
| void | setHasDebugValue (bool b) |
| bool | isDivergent () const |
| bool | use_empty () const |
| Return true if there are no uses of this node. | |
| bool | hasOneUse () const |
| Return true if there is exactly one use of this node. | |
| size_t | use_size () const |
| Return the number of uses of this node. | |
| int | getNodeId () const |
| Return the unique node id. | |
| void | setNodeId (int Id) |
| Set unique node id. | |
| int | getCombinerWorklistIndex () const |
| Get worklist index for DAGCombiner. | |
| void | setCombinerWorklistIndex (int Index) |
| Set worklist index for DAGCombiner. | |
| unsigned | getIROrder () const |
| Return the node ordering. | |
| void | setIROrder (unsigned Order) |
| Set the node ordering. | |
| const DebugLoc & | getDebugLoc () const |
| Return the source location info. | |
| void | setDebugLoc (DebugLoc dl) |
| Set source location info. | |
| use_iterator | use_begin () const |
| Provide iteration support to walk over all uses of an SDNode. | |
| iterator_range< use_iterator > | uses () |
| iterator_range< use_iterator > | uses () const |
| user_iterator | user_begin () const |
| Provide iteration support to walk over all users of an SDNode. | |
| iterator_range< user_iterator > | users () |
| iterator_range< user_iterator > | users () const |
| bool | hasNUsesOfValue (unsigned NUses, unsigned Value) const |
| Return true if there are exactly NUSES uses of the indicated value. | |
| bool | hasAnyUseOfValue (unsigned Value) const |
| Return true if there are any use of the indicated value. | |
| bool | isOnlyUserOf (const SDNode *N) const |
| Return true if this node is the only use of N. | |
| bool | isOperandOf (const SDNode *N) const |
| Return true if this node is an operand of N. | |
| bool | isPredecessorOf (const SDNode *N) const |
| Return true if this node is a predecessor of N. | |
| bool | hasPredecessor (const SDNode *N) const |
| Return true if N is a predecessor of this node. | |
| unsigned | getNumOperands () const |
| Return the number of values used by this operation. | |
| uint64_t | getConstantOperandVal (unsigned Num) const |
| Helper method returns the integer value of a ConstantSDNode operand. | |
| uint64_t | getAsZExtVal () const |
| Helper method returns the zero-extended integer value of a ConstantSDNode. | |
| const APInt & | getConstantOperandAPInt (unsigned Num) const |
| Helper method returns the APInt of a ConstantSDNode operand. | |
| const APInt & | getAsAPIntVal () const |
| Helper method returns the APInt value of a ConstantSDNode. | |
| const SDValue & | getOperand (unsigned Num) const |
| op_iterator | op_begin () const |
| op_iterator | op_end () const |
| ArrayRef< SDUse > | ops () const |
| iterator_range< value_op_iterator > | op_values () const |
| SDVTList | getVTList () const |
| SDNode * | getGluedNode () const |
| If this node has a glue operand, return the node to which the glue operand points. | |
| SDNode * | getGluedUser () const |
| If this node has a glue value with a user, return the user (there is at most one). | |
| SDNodeFlags | getFlags () const |
| void | setFlags (SDNodeFlags NewFlags) |
| void | dropFlags (unsigned Mask) |
| void | intersectFlagsWith (const SDNodeFlags Flags) |
| Clear any flags in this node that aren't also set in Flags. | |
| bool | hasPoisonGeneratingFlags () const |
| void | setCFIType (uint32_t Type) |
| uint32_t | getCFIType () const |
| unsigned | getNumValues () const |
| Return the number of values defined/returned by this operator. | |
| EVT | getValueType (unsigned ResNo) const |
| Return the type of a specified result. | |
| MVT | getSimpleValueType (unsigned ResNo) const |
| Return the type of a specified result as a simple type. | |
| TypeSize | getValueSizeInBits (unsigned ResNo) const |
| Returns MVT::getSizeInBits(getValueType(ResNo)). | |
| value_iterator | value_begin () const |
| value_iterator | value_end () const |
| iterator_range< value_iterator > | values () const |
| std::string | getOperationName (const SelectionDAG *G=nullptr) const |
| Return the opcode of this operation for printing. | |
| void | print_types (raw_ostream &OS, const SelectionDAG *G) const |
| void | print_details (raw_ostream &OS, const SelectionDAG *G) const |
| void | print (raw_ostream &OS, const SelectionDAG *G=nullptr) const |
| void | printr (raw_ostream &OS, const SelectionDAG *G=nullptr) const |
| void | printrFull (raw_ostream &O, const SelectionDAG *G=nullptr) const |
| Print a SelectionDAG node and all children down to the leaves. | |
| void | printrWithDepth (raw_ostream &O, const SelectionDAG *G=nullptr, unsigned depth=100) const |
| Print a SelectionDAG node and children up to depth "depth." The given SelectionDAG allows target-specific nodes to be printed in human-readable form. | |
| void | dump () const |
| Dump this node, for debugging. | |
| void | dumpr () const |
| Dump (recursively) this node and its use-def subgraph. | |
| void | dump (const SelectionDAG *G) const |
| Dump this node, for debugging. | |
| void | dumpr (const SelectionDAG *G) const |
| Dump (recursively) this node and its use-def subgraph. | |
| void | dumprFull (const SelectionDAG *G=nullptr) const |
| printrFull to dbgs(). | |
| void | dumprWithDepth (const SelectionDAG *G=nullptr, unsigned depth=100) const |
| printrWithDepth to dbgs(). | |
| void | Profile (FoldingSetNodeID &ID) const |
| Gather unique data for the node. | |
| void | addUse (SDUse &U) |
| This method should only be used by the SDUse class. | |
| Public Member Functions inherited from llvm::FoldingSetBase::Node |
|
| Node ()=default | |
| void * | getNextInBucket () const |
| void | SetNextInBucket (void *N) |
| Public Member Functions inherited from llvm::ilist_node_impl< OptionsT > |
|
| self_iterator | getIterator () |
| const_self_iterator | getIterator () const |
| reverse_self_iterator | getReverseIterator () |
| const_reverse_self_iterator | getReverseIterator () const |
| bool | isSentinel () const |
| Check whether this is the sentinel node. | |
| Public Member Functions inherited from llvm::ilist_detail::node_parent_access< ilist_node_impl< OptionsT >, OptionsT::parent_ty > |
|
| const OptionsT::parent_ty * | getParent () const |
| OptionsT::parent_ty * | getParent () |
| void | setParent (OptionsT::parent_ty *Parent) |
| Static Public Member Functions | |
|---|---|
| static void | recastRawBits (bool IsLittleEndian, unsigned DstEltSizeInBits, SmallVectorImpl< APInt > &DstBitElements, ArrayRef< APInt > SrcBitElements, BitVector &DstUndefElements, const BitVector &SrcUndefElements) |
| Recast bit data SrcBitElements to DstEltSizeInBits wide elements. | |
| static bool | classof (const SDNode *N) |
| Static Public Member Functions inherited from llvm::SDNode |
|
| static use_iterator | use_end () |
| static user_iterator | user_end () |
| static bool | hasPredecessorHelper (const SDNode *N, SmallPtrSetImpl< const SDNode * > &Visited, SmallVectorImpl< const SDNode * > &Worklist, unsigned int MaxSteps=0, bool TopologicalPrune=false) |
| Returns true if N is a predecessor of any node in Worklist. | |
| static bool | areOnlyUsersOf (ArrayRef< const SDNode * > Nodes, const SDNode *N) |
| Return true if all the users of N are contained in Nodes. | |
| static constexpr size_t | getMaxNumOperands () |
| Return the maximum number of operands that a SDNode can hold. | |
| static const char * | getIndexedModeName (ISD::MemIndexedMode AM) |
| Additional Inherited Members | |
|---|---|
| Public Types inherited from llvm::SDNode |
|
| using | op_iterator = SDUse * |
| using | value_iterator = const EVT * |
| Public Attributes inherited from llvm::SDNode |
|
| uint16_t | PersistentId = 0xffff |
| Unique and persistent id per SDNode in the DAG. | |
| Protected Types inherited from llvm::SDNode |
|
| enum | { NumSDNodeBits = 3 } |
| enum | { NumMemSDNodeBits = NumSDNodeBits + 4 } |
| enum | { NumLSBaseSDNodeBits = NumMemSDNodeBits + 3 } |
| Protected Types inherited from llvm::ilist_node_impl< OptionsT > |
|
| using | self_iterator = typename ilist_select_iterator_type< OptionsT::has_iterator_bits, OptionsT, false, false >::type |
| using | const_self_iterator = typename ilist_select_iterator_type< OptionsT::has_iterator_bits, OptionsT, false, true >::type |
| using | reverse_self_iterator = typename ilist_select_iterator_type< OptionsT::has_iterator_bits, OptionsT, true, false >::type |
| using | const_reverse_self_iterator = typename ilist_select_iterator_type< OptionsT::has_iterator_bits, OptionsT, true, true >::type |
| Protected Member Functions inherited from llvm::SDNode |
|
| SDNode (unsigned Opc, unsigned Order, DebugLoc dl, SDVTList VTs) | |
| Create an SDNode. | |
| void | DropOperands () |
| Release the operands and set this node to have zero operands. | |
| Protected Member Functions inherited from llvm::ilist_node_impl< OptionsT > |
|
| ilist_node_impl ()=default | |
| Static Protected Member Functions inherited from llvm::SDNode |
|
| static SDVTList | getSDVTList (MVT VT) |
| Protected Attributes inherited from llvm::SDNode |
|
| union { | |
| char RawSDNodeBits [sizeof(uint16_t)] | |
| SDNodeBitfields SDNodeBits | |
| ConstantSDNodeBitfields ConstantSDNodeBits | |
| MemSDNodeBitfields MemSDNodeBits | |
| LSBaseSDNodeBitfields LSBaseSDNodeBits | |
| LoadSDNodeBitfields LoadSDNodeBits | |
| StoreSDNodeBitfields StoreSDNodeBits | |
| }; | |
A "pseudo-class" with methods for operating on BUILD_VECTORs.
Definition at line 2107 of file SelectionDAGNodes.h.
| llvm::BuildVectorSDNode::BuildVectorSDNode ( ) | explicitdelete |
|---|
◆ classof()
| static bool llvm::BuildVectorSDNode::classof ( const SDNode * N) | inlinestatic |
|---|
◆ getConstantFPSplatNode() [1/2]
Returns the splatted constant FP or null if this is not a constant FP splat.
If passed a non-null UndefElements bitvector, it will resize it to match the vector width and set the bits where elements are undef.
Definition at line 13268 of file SelectionDAG.cpp.
References getSplatValue().
◆ getConstantFPSplatNode() [2/2]
Returns the demanded splatted constant FP or null if this is not a constant FP splat.
The DemandedElts mask indicates the elements that must be in the splat. If passed a non-null UndefElements bitvector, it will resize it to match the vector width and set the bits where elements are undef.
Definition at line 13261 of file SelectionDAG.cpp.
References getSplatValue().
◆ getConstantFPSplatPow2ToLog2Int()
| int32_t BuildVectorSDNode::getConstantFPSplatPow2ToLog2Int | ( | BitVector * | UndefElements, |
|---|---|---|---|
| uint32_t | BitWidth | ||
| ) | const |
◆ getConstantRawBits()
Extract the raw bit data from a build vector of Undef, Constant or ConstantFP node elements.
Each raw bit element will be DstEltSizeInBits wide, undef elements are treated as zero, and entirely undefined elements are flagged in UndefElements.
Definition at line 13290 of file SelectionDAG.cpp.
References assert(), llvm::SDNode::getNumOperands(), llvm::SDNode::getOperand(), llvm::EVT::getScalarSizeInBits(), llvm::SDNode::getValueType(), llvm::APInt::getZero(), I, isConstant(), recastRawBits(), and llvm::BitVector::set().
◆ getConstantSplatNode() [1/2]
Returns the splatted constant or null if this is not a constant splat.
If passed a non-null UndefElements bitvector, it will resize it to match the vector width and set the bits where elements are undef.
Definition at line 13256 of file SelectionDAG.cpp.
References getSplatValue().
◆ getConstantSplatNode() [2/2]
◆ getRepeatedSequence() [1/2]
Find the shortest repeating sequence of values in the build vector.
e.g. { u, X, u, X, u, u, X, u } -> { X } { X, Y, u, Y, u, u, X, u } -> { X, Y }
Currently this must be a power-of-2 build vector. The DemandedElts mask indicates the elements that must be present, undemanded elements in Sequence may be null (SDValue()). If passed a non-null UndefElements bitvector, it will resize it to match the original vector width and set the bits where elements are undef. If result is false, Sequence will be empty.
Definition at line 13196 of file SelectionDAG.cpp.
References assert(), llvm::BitVector::clear(), llvm::APInt::getBitWidth(), llvm::SDNode::getNumOperands(), llvm::SDNode::getOperand(), I, llvm::isPowerOf2_32(), llvm::SDValue::isUndef(), llvm::SDNode::isUndef(), and llvm::BitVector::resize().
Referenced by getRepeatedSequence(), and lowerBuildVectorAsBroadcast().
◆ getRepeatedSequence() [2/2]
Find the shortest repeating sequence of values in the build vector.
e.g. { u, X, u, X, u, u, X, u } -> { X } { X, Y, u, Y, u, u, X, u } -> { X, Y }
Currently this must be a power-of-2 build vector. If passed a non-null UndefElements bitvector, it will resize it to match the original vector width and set the bits where elements are undef. If result is false, Sequence will be empty.
Definition at line 13242 of file SelectionDAG.cpp.
References llvm::APInt::getAllOnes(), llvm::SDNode::getNumOperands(), and getRepeatedSequence().
◆ getSplatValue() [1/2]
| SDValue BuildVectorSDNode::getSplatValue | ( | BitVector * | UndefElements = nullptr | ) | const |
|---|
◆ getSplatValue() [2/2]
Returns the demanded splatted value or a null value if this is not a splat.
The DemandedElts mask indicates the elements that must be in the splat. If passed a non-null UndefElements bitvector, it will resize it to match the vector width and set the bits where elements are undef.
Definition at line 13156 of file SelectionDAG.cpp.
References assert(), llvm::BitVector::clear(), llvm::APInt::countr_zero(), llvm::APInt::getBitWidth(), llvm::SDNode::getNumOperands(), llvm::SDNode::getOperand(), llvm::SDNode::isUndef(), and llvm::BitVector::resize().
Referenced by createMMXBuildVector(), getConstantFPSplatNode(), getConstantFPSplatPow2ToLog2Int(), getConstantSplatNode(), getSplatValue(), and llvm::SelectionDAG::getVectorShuffle().
◆ isConstant()
| bool BuildVectorSDNode::isConstant | ( | ) | const |
|---|
◆ isConstantSequence()
| std::optional< std::pair< APInt, APInt > > BuildVectorSDNode::isConstantSequence | ( | ) | const |
|---|
If this BuildVector is constant and represents the numerical series "<a, a+n, a+2n, a+3n, ...>" where a is integer and n is a non-zero integer, the value "<a,n>" is returned.
Definition at line 13390 of file SelectionDAG.cpp.
References llvm::SDNode::getConstantOperandAPInt(), llvm::SDNode::getNumOperands(), llvm::SDNode::getOperand(), llvm::EVT::getScalarSizeInBits(), llvm::SDNode::getValueType(), llvm::APInt::isZero(), and llvm::APInt::trunc().
◆ isConstantSplat()
Check if this is a constant splat, and if so, find the smallest element size that splats the vector.
If MinSplatBits is nonzero, the element size must be at least that large. Note that the splat element may be the entire vector (i.e., a one element vector). Returns the splat element value in SplatValue. Any undefined bits in that value are zero, and the corresponding bits in the SplatUndef mask are set. The SplatBitSize value is set to the splat element size in bits. HasAnyUndefs is set to true if any bits in the vector are undefined. isBigEndian describes the endianness of the target.
Definition at line 13080 of file SelectionDAG.cpp.
References assert(), llvm::APInt::extractBits(), llvm::SDNode::getNumOperands(), llvm::SDNode::getOperand(), llvm::EVT::getScalarSizeInBits(), llvm::EVT::getSizeInBits(), llvm::SDNode::getValueType(), llvm::APInt::insertBits(), llvm::SDValue::isUndef(), llvm::EVT::isVector(), and llvm::APInt::setBits().
Referenced by EmitVectorComparison(), getVShiftImm(), INITIALIZE_PASS(), isVectorAllOnes(), lowerBuildVectorAsBroadcast(), PerformANDCombine(), llvm::PPCTargetLowering::PerformDAGCombine(), performDSPShiftCombine(), PerformORCombine(), resolveBuildVector(), llvm::SystemZVectorConstantInfo::SystemZVectorConstantInfo(), and tryCombineShiftImm().
◆ recastRawBits()
Recast bit data SrcBitElements to DstEltSizeInBits wide elements.
Undef elements are treated as zero, and entirely undefined elements are flagged in DstUndefElements.
Definition at line 13326 of file SelectionDAG.cpp.
References assert(), llvm::SmallVectorImpl< T >::assign(), llvm::BitVector::clear(), llvm::APInt::extractBits(), llvm::APInt::getBitWidth(), llvm::APInt::getZero(), I, Idx, llvm::APInt::insertBits(), llvm::BitVector::reset(), llvm::BitVector::resize(), llvm::BitVector::set(), llvm::ArrayRef< T >::size(), and llvm::BitVector::size().
Referenced by llvm::SelectionDAG::FoldConstantArithmetic(), and getConstantRawBits().
The documentation for this class was generated from the following files:
- include/llvm/CodeGen/SelectionDAGNodes.h
- lib/CodeGen/SelectionDAG/SelectionDAG.cpp