A "pseudo-class" with methods for operating on BUILD_VECTORs. More...
#include "llvm/CodeGen/SelectionDAGNodes.h"
Public Member Functions | |
| BuildVectorSDNode ()=delete | |
| LLVM_ABI 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. | |
| LLVM_ABI SDValue | getSplatValue (const APInt &DemandedElts, BitVector *UndefElements=nullptr) const |
| Returns the demanded splatted value or a null value if this is not a splat. | |
| LLVM_ABI SDValue | getSplatValue (BitVector *UndefElements=nullptr) const |
| Returns the splatted value or a null value if this is not a splat. | |
| LLVM_ABI bool | getRepeatedSequence (const APInt &DemandedElts, SmallVectorImpl< SDValue > &Sequence, BitVector *UndefElements=nullptr) const |
| Find the shortest repeating sequence of values in the build vector. | |
| LLVM_ABI bool | getRepeatedSequence (SmallVectorImpl< SDValue > &Sequence, BitVector *UndefElements=nullptr) const |
| Find the shortest repeating sequence of values in the build vector. | |
| LLVM_ABI ConstantSDNode * | getConstantSplatNode (const APInt &DemandedElts, BitVector *UndefElements=nullptr) const |
| Returns the demanded splatted constant or null if this is not a constant splat. | |
| LLVM_ABI ConstantSDNode * | getConstantSplatNode (BitVector *UndefElements=nullptr) const |
| Returns the splatted constant or null if this is not a constant splat. | |
| LLVM_ABI 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. | |
| LLVM_ABI ConstantFPSDNode * | getConstantFPSplatNode (BitVector *UndefElements=nullptr) const |
| Returns the splatted constant FP or null if this is not a constant FP splat. | |
| LLVM_ABI 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. | |
| LLVM_ABI 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. | |
| LLVM_ABI bool | isConstant () const |
| LLVM_ABI 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 <target>ISD namespace). | |
| bool | isUndef () const |
| Returns true if the node type is UNDEF or POISON. | |
| bool | isAnyAdd () const |
| Returns true if the node type is ADD or PTRADD. | |
| 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 | isAssert () const |
| Test if this node is an assert operation. | |
| 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. | |
| LLVM_ABI bool | hasAnyUseOfValue (unsigned Value) const |
| Return true if there are any use of the indicated value. | |
| LLVM_ABI bool | isOnlyUserOf (const SDNode *N) const |
| Return true if this node is the only use of N. | |
| LLVM_ABI 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. | |
| LLVM_ABI 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. | |
| std::optional< APInt > | bitcastToAPInt () const |
| 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) |
| LLVM_ABI 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 |
| LLVM_ABI std::string | getOperationName (const SelectionDAG *G=nullptr) const |
| Return the opcode of this operation for printing. | |
| LLVM_ABI void | print_types (raw_ostream &OS, const SelectionDAG *G) const |
| LLVM_ABI void | print_details (raw_ostream &OS, const SelectionDAG *G) const |
| LLVM_ABI void | print (raw_ostream &OS, const SelectionDAG *G=nullptr) const |
| LLVM_ABI void | printr (raw_ostream &OS, const SelectionDAG *G=nullptr) const |
| LLVM_ABI void | printrFull (raw_ostream &O, const SelectionDAG *G=nullptr) const |
| Print a SelectionDAG node and all children down to the leaves. | |
| LLVM_ABI 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. | |
| LLVM_ABI void | dump () const |
| Dump this node, for debugging. | |
| LLVM_ABI void | dumpr () const |
| Dump (recursively) this node and its use-def subgraph. | |
| LLVM_ABI void | dump (const SelectionDAG *G) const |
| Dump this node, for debugging. | |
| LLVM_ABI void | dumpr (const SelectionDAG *G) const |
| Dump (recursively) this node and its use-def subgraph. | |
| LLVM_ABI void | dumprFull (const SelectionDAG *G=nullptr) const |
| printrFull to dbgs(). | |
| LLVM_ABI void | dumprWithDepth (const SelectionDAG *G=nullptr, unsigned depth=100) const |
| printrWithDepth to dbgs(). | |
| LLVM_ABI 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< ilist_detail::compute_node_options< SDNode, Options... >::type > | |
| self_iterator | getIterator () |
| reverse_self_iterator | getReverseIterator () |
| std::enable_if_t< T::is_sentinel_tracking_explicit, bool > | isSentinel () const |
| Check whether this is the sentinel node. | |
| Public Member Functions inherited from llvm::ilist_detail::node_parent_access< ilist_node_impl< ilist_detail::compute_node_options< SDNode, Options... >::type >, ilist_detail::compute_node_options< SDNode, Options... >::type::parent_ty > | |
| const ilist_detail::compute_node_options< SDNode, Options... >::type::parent_ty * | getParent () const |
| void | setParent (ilist_detail::compute_node_options< SDNode, Options... >::type::parent_ty *Parent) |
Static Public Member Functions | |
| static LLVM_ABI 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 LLVM_ABI 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 LLVM_ABI const char * | getIndexedModeName (ISD::MemIndexedMode AM) |
Detailed Description
A "pseudo-class" with methods for operating on BUILD_VECTORs.
Definition at line 2174 of file SelectionDAGNodes.h.
Constructor & Destructor Documentation
◆ BuildVectorSDNode()
|
explicitdelete |
References llvm::BitWidth, isBigEndian(), and LLVM_ABI.
Member Function Documentation
◆ classof()
Definition at line 2305 of file SelectionDAGNodes.h.
References llvm::ISD::BUILD_VECTOR, N, and llvm::SDNode::SDNode().
◆ getConstantFPSplatNode() [1/2]
| ConstantFPSDNode * BuildVectorSDNode::getConstantFPSplatNode | ( | BitVector * | UndefElements = nullptr | ) | const |
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 13717 of file SelectionDAG.cpp.
References llvm::dyn_cast_or_null(), and getSplatValue().
◆ getConstantFPSplatNode() [2/2]
| ConstantFPSDNode * BuildVectorSDNode::getConstantFPSplatNode | ( | const APInt & | DemandedElts, |
| BitVector * | UndefElements = nullptr ) const |
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 13710 of file SelectionDAG.cpp.
References llvm::dyn_cast_or_null(), and getSplatValue().
◆ getConstantFPSplatPow2ToLog2Int()
| int32_t BuildVectorSDNode::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.
Otherwise, return -1.
The BitWidth specifies the necessary bit precision.
Definition at line 13722 of file SelectionDAG.cpp.
References llvm::BitWidth, llvm::APFloat::convertToInteger(), llvm::dyn_cast_or_null(), getSplatValue(), llvm::APFloatBase::opOK, and llvm::APFloatBase::rmTowardZero.
Referenced by performFpToIntCombine(), and PerformVCVTCombine().
◆ getConstantRawBits()
| bool BuildVectorSDNode::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.
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 13739 of file SelectionDAG.cpp.
References assert(), llvm::dyn_cast(), llvm::SDNode::getNumOperands(), llvm::SDNode::getOperand(), llvm::EVT::getScalarSizeInBits(), llvm::SDNode::getValueType(), llvm::APInt::getZero(), I, isConstant(), recastRawBits(), and llvm::BitVector::set().
Referenced by llvm::SelectionDAG::FoldConstantBuildVector().
◆ getConstantSplatNode() [1/2]
| ConstantSDNode * BuildVectorSDNode::getConstantSplatNode | ( | BitVector * | UndefElements = nullptr | ) | const |
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 13705 of file SelectionDAG.cpp.
References llvm::dyn_cast_or_null(), and getSplatValue().
◆ getConstantSplatNode() [2/2]
| ConstantSDNode * BuildVectorSDNode::getConstantSplatNode | ( | const APInt & | DemandedElts, |
| BitVector * | UndefElements = nullptr ) const |
Returns the demanded splatted constant or null if this is not a constant 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 13698 of file SelectionDAG.cpp.
References llvm::dyn_cast_or_null(), and getSplatValue().
Referenced by llvm::TargetLowering::isConstFalseVal().
◆ getRepeatedSequence() [1/2]
| bool BuildVectorSDNode::getRepeatedSequence | ( | const APInt & | DemandedElts, |
| SmallVectorImpl< SDValue > & | Sequence, | ||
| BitVector * | UndefElements = nullptr ) const |
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 13645 of file SelectionDAG.cpp.
References AbstractManglingParser< Derived, Alloc >::NumOps, assert(), llvm::BitVector::clear(), llvm::APInt::getBitWidth(), llvm::SDNode::getNumOperands(), llvm::SDNode::getOperand(), I, llvm::isPowerOf2_32(), llvm::SDNode::isUndef(), llvm::SDValue::isUndef(), llvm::BitVector::resize(), and SDValue().
Referenced by getRepeatedSequence(), and lowerBuildVectorAsBroadcast().
◆ getRepeatedSequence() [2/2]
| bool BuildVectorSDNode::getRepeatedSequence | ( | SmallVectorImpl< SDValue > & | Sequence, |
| BitVector * | UndefElements = nullptr ) const |
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 13691 of file SelectionDAG.cpp.
References llvm::APInt::getAllOnes(), llvm::SDNode::getNumOperands(), and getRepeatedSequence().
◆ getSplatValue() [1/2]
Returns the splatted value or a null value if this is not a 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 13640 of file SelectionDAG.cpp.
References llvm::APInt::getAllOnes(), llvm::SDNode::getNumOperands(), and getSplatValue().
◆ getSplatValue() [2/2]
| SDValue BuildVectorSDNode::getSplatValue | ( | const APInt & | DemandedElts, |
| BitVector * | UndefElements = nullptr ) const |
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 13605 of file SelectionDAG.cpp.
References AbstractManglingParser< Derived, Alloc >::NumOps, assert(), llvm::BitVector::clear(), llvm::APInt::countr_zero(), llvm::APInt::getBitWidth(), llvm::SDNode::getNumOperands(), llvm::SDNode::getOperand(), llvm::SDNode::isUndef(), llvm::BitVector::resize(), and SDValue().
Referenced by combineGatherScatter(), createMMXBuildVector(), getConstantFPSplatNode(), getConstantFPSplatNode(), getConstantFPSplatPow2ToLog2Int(), getConstantSplatNode(), getConstantSplatNode(), getSplatValue(), llvm::SelectionDAG::getVectorShuffle(), and lowerVECTOR_SHUFFLE().
◆ isConstant()
| bool BuildVectorSDNode::isConstant | ( | ) | const |
Definition at line 13829 of file SelectionDAG.cpp.
References llvm::ISD::Constant, llvm::ISD::ConstantFP, llvm::SDNode::op_values(), and Opc.
Referenced by combineGatherScatter(), combineVectorCompareAndMaskUnaryOp(), detectExtMul(), getConstantRawBits(), and llvm::SystemZVectorConstantInfo::SystemZVectorConstantInfo().
◆ isConstantSequence()
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 13839 of file SelectionDAG.cpp.
References AbstractManglingParser< Derived, Alloc >::NumOps, llvm::SDNode::getConstantOperandAPInt(), llvm::SDNode::getNumOperands(), llvm::SDNode::getOperand(), llvm::EVT::getScalarSizeInBits(), llvm::SDNode::getValueType(), llvm::isa(), llvm::APInt::isZero(), and llvm::APInt::trunc().
◆ isConstantSplat()
| bool BuildVectorSDNode::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.
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 13529 of file SelectionDAG.cpp.
References AbstractManglingParser< Derived, Alloc >::NumOps, assert(), llvm::dyn_cast(), 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 getVShiftImm(), getVShiftImm(), INITIALIZE_PASS(), isVectorAllOnes(), lowerBuildVectorAsBroadcast(), PerformANDCombine(), llvm::PPCTargetLowering::PerformDAGCombine(), performDSPShiftCombine(), PerformORCombine(), resolveBuildVector(), llvm::SystemZVectorConstantInfo::SystemZVectorConstantInfo(), and tryCombineShiftImm().
◆ recastRawBits()
|
static |
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 13775 of file SelectionDAG.cpp.
References assert(), llvm::SmallVectorImpl< T >::assign(), llvm::BitVector::clear(), llvm::APInt::extractBits(), llvm::APInt::getBitWidth(), llvm::APInt::getZero(), I, 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
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