LLVM 20.0.0git
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llvm::VPInstruction Class Reference

This is a concrete Recipe that models a single VPlan-level instruction. More...

#include "Transforms/Vectorize/VPlan.h"

Inheritance diagram for llvm::VPInstruction:
Inheritance graph
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Public Types

enum  {
  FirstOrderRecurrenceSplice , Not , SLPLoad , SLPStore ,
  ActiveLaneMask , ExplicitVectorLength , ResumePhi , CalculateTripCountMinusVF ,
  CanonicalIVIncrementForPart , BranchOnCount , BranchOnCond , ComputeReductionResult ,
  ExtractFromEnd , LogicalAnd , PtrAdd , AnyOf
}
 VPlan opcodes, extending LLVM IR with idiomatics instructions. More...
 
- Public Types inherited from llvm::VPDef
using VPRecipeTy = enum { VPBranchOnMaskSC, VPDerivedIVSC, VPExpandSCEVSC, VPIRInstructionSC, VPInstructionSC, VPInterleaveSC, VPReductionEVLSC, VPReductionSC, VPReplicateSC, VPScalarCastSC, VPScalarIVStepsSC, VPVectorPointerSC, VPReverseVectorPointerSC, VPWidenCallSC, VPWidenCanonicalIVSC, VPWidenCastSC, VPWidenGEPSC, VPWidenIntrinsicSC, VPWidenLoadEVLSC, VPWidenLoadSC, VPWidenStoreEVLSC, VPWidenStoreSC, VPWidenSC, VPWidenEVLSC, VPWidenSelectSC, VPBlendSC, VPHistogramSC, VPWidenPHISC, VPPredInstPHISC, VPCanonicalIVPHISC, VPActiveLaneMaskPHISC, VPEVLBasedIVPHISC, VPFirstOrderRecurrencePHISC, VPWidenIntOrFpInductionSC, VPWidenPointerInductionSC, VPScalarPHISC, VPReductionPHISC, VPFirstPHISC=VPWidenPHISC, VPFirstHeaderPHISC=VPCanonicalIVPHISC, VPLastHeaderPHISC=VPReductionPHISC, VPLastPHISC=VPReductionPHISC, }
 An enumeration for keeping track of the concrete subclass of VPRecipeBase that is actually instantiated.
 
- Public Types inherited from llvm::VPUser
typedef SmallVectorImpl< VPValue * >::iterator operand_iterator
 
typedef SmallVectorImpl< VPValue * >::const_iterator const_operand_iterator
 
typedef iterator_range< operand_iteratoroperand_range
 
typedef iterator_range< const_operand_iteratorconst_operand_range
 
- Public Types inherited from llvm::VPValue
enum  { VPValueSC , VPVRecipeSC }
 An enumeration for keeping track of the concrete subclass of VPValue that are actually instantiated. More...
 
typedef SmallVectorImpl< VPUser * >::iterator user_iterator
 
typedef SmallVectorImpl< VPUser * >::const_iterator const_user_iterator
 
typedef iterator_range< user_iteratoruser_range
 
typedef iterator_range< const_user_iteratorconst_user_range
 

Public Member Functions

 VPInstruction (unsigned Opcode, ArrayRef< VPValue * > Operands, DebugLoc DL, const Twine &Name="")
 
 VPInstruction (unsigned Opcode, std::initializer_list< VPValue * > Operands, DebugLoc DL={}, const Twine &Name="")
 
 VPInstruction (unsigned Opcode, CmpInst::Predicate Pred, VPValue *A, VPValue *B, DebugLoc DL={}, const Twine &Name="")
 
 VPInstruction (unsigned Opcode, std::initializer_list< VPValue * > Operands, WrapFlagsTy WrapFlags, DebugLoc DL={}, const Twine &Name="")
 
 VPInstruction (unsigned Opcode, std::initializer_list< VPValue * > Operands, DisjointFlagsTy DisjointFlag, DebugLoc DL={}, const Twine &Name="")
 
 VPInstruction (VPValue *Ptr, VPValue *Offset, GEPNoWrapFlags Flags, DebugLoc DL={}, const Twine &Name="")
 
 VPInstruction (unsigned Opcode, std::initializer_list< VPValue * > Operands, FastMathFlags FMFs, DebugLoc DL={}, const Twine &Name="")
 
VPInstructionclone () override
 Clone the current recipe.
 
unsigned getOpcode () const
 
void execute (VPTransformState &State) override
 Generate the instruction.
 
InstructionCost computeCost (ElementCount VF, VPCostContext &Ctx) const override
 Return the cost of this VPInstruction.
 
void print (raw_ostream &O, const Twine &Indent, VPSlotTracker &SlotTracker) const override
 Print the VPInstruction to O.
 
LLVM_DUMP_METHOD void dump () const
 Print the VPInstruction to dbgs() (for debugging).
 
bool hasResult () const
 
bool onlyFirstLaneUsed (const VPValue *Op) const override
 Returns true if the recipe only uses the first lane of operand Op.
 
bool onlyFirstPartUsed (const VPValue *Op) const override
 Returns true if the recipe only uses the first part of operand Op.
 
bool isVectorToScalar () const
 Returns true if this VPInstruction produces a scalar value from a vector, e.g.
 
bool isSingleScalar () const
 Returns true if this VPInstruction's operands are single scalars and the result is also a single scalar.
 
StringRef getName () const
 Returns the symbolic name assigned to the VPInstruction.
 
- Public Member Functions inherited from llvm::VPRecipeWithIRFlags
template<typename IterT >
 VPRecipeWithIRFlags (const unsigned char SC, IterT Operands, DebugLoc DL={})
 
template<typename IterT >
 VPRecipeWithIRFlags (const unsigned char SC, IterT Operands, Instruction &I)
 
template<typename IterT >
 VPRecipeWithIRFlags (const unsigned char SC, IterT Operands, CmpInst::Predicate Pred, DebugLoc DL={})
 
template<typename IterT >
 VPRecipeWithIRFlags (const unsigned char SC, IterT Operands, WrapFlagsTy WrapFlags, DebugLoc DL={})
 
template<typename IterT >
 VPRecipeWithIRFlags (const unsigned char SC, IterT Operands, FastMathFlags FMFs, DebugLoc DL={})
 
template<typename IterT >
 VPRecipeWithIRFlags (const unsigned char SC, IterT Operands, DisjointFlagsTy DisjointFlags, DebugLoc DL={})
 
void dropPoisonGeneratingFlags ()
 Drop all poison-generating flags.
 
void setFlags (Instruction *I) const
 Set the IR flags for I.
 
CmpInst::Predicate getPredicate () const
 
GEPNoWrapFlags getGEPNoWrapFlags () const
 
bool hasFastMathFlags () const
 Returns true if the recipe has fast-math flags.
 
FastMathFlags getFastMathFlags () const
 
bool hasNoUnsignedWrap () const
 
bool hasNoSignedWrap () const
 
bool isDisjoint () const
 
void printFlags (raw_ostream &O) const
 
- Public Member Functions inherited from llvm::VPSingleDefRecipe
template<typename IterT >
 VPSingleDefRecipe (const unsigned char SC, IterT Operands, DebugLoc DL={})
 
 VPSingleDefRecipe (const unsigned char SC, ArrayRef< VPValue * > Operands, DebugLoc DL={})
 
template<typename IterT >
 VPSingleDefRecipe (const unsigned char SC, IterT Operands, Value *UV, DebugLoc DL={})
 
virtual VPSingleDefRecipeclone () override=0
 Clone the current recipe.
 
InstructiongetUnderlyingInstr ()
 Returns the underlying instruction.
 
const InstructiongetUnderlyingInstr () const
 
LLVM_DUMP_METHOD void dump () const
 Print this VPSingleDefRecipe to dbgs() (for debugging).
 
- Public Member Functions inherited from llvm::VPRecipeBase
 VPRecipeBase (const unsigned char SC, ArrayRef< VPValue * > Operands, DebugLoc DL={})
 
template<typename IterT >
 VPRecipeBase (const unsigned char SC, iterator_range< IterT > Operands, DebugLoc DL={})
 
virtual ~VPRecipeBase ()=default
 
virtual VPRecipeBaseclone ()=0
 Clone the current recipe.
 
VPBasicBlockgetParent ()
 
const VPBasicBlockgetParent () const
 
virtual void execute (VPTransformState &State)=0
 The method which generates the output IR instructions that correspond to this VPRecipe, thereby "executing" the VPlan.
 
InstructionCost cost (ElementCount VF, VPCostContext &Ctx)
 Return the cost of this recipe, taking into account if the cost computation should be skipped and the ForceTargetInstructionCost flag.
 
void insertBefore (VPRecipeBase *InsertPos)
 Insert an unlinked recipe into a basic block immediately before the specified recipe.
 
void insertBefore (VPBasicBlock &BB, iplist< VPRecipeBase >::iterator IP)
 Insert an unlinked recipe into BB immediately before the insertion point IP;.
 
void insertAfter (VPRecipeBase *InsertPos)
 Insert an unlinked Recipe into a basic block immediately after the specified Recipe.
 
void moveAfter (VPRecipeBase *MovePos)
 Unlink this recipe from its current VPBasicBlock and insert it into the VPBasicBlock that MovePos lives in, right after MovePos.
 
void moveBefore (VPBasicBlock &BB, iplist< VPRecipeBase >::iterator I)
 Unlink this recipe and insert into BB before I.
 
void removeFromParent ()
 This method unlinks 'this' from the containing basic block, but does not delete it.
 
iplist< VPRecipeBase >::iterator eraseFromParent ()
 This method unlinks 'this' from the containing basic block and deletes it.
 
bool mayHaveSideEffects () const
 Returns true if the recipe may have side-effects.
 
bool isPhi () const
 Returns true for PHI-like recipes.
 
bool mayReadFromMemory () const
 Returns true if the recipe may read from memory.
 
bool mayWriteToMemory () const
 Returns true if the recipe may write to memory.
 
bool mayReadOrWriteMemory () const
 Returns true if the recipe may read from or write to memory.
 
DebugLoc getDebugLoc () const
 Returns the debug location of the recipe.
 
- Public Member Functions inherited from llvm::ilist_node_with_parent< VPRecipeBase, VPBasicBlock >
VPRecipeBasegetPrevNode ()
 
const VPRecipeBasegetPrevNode () const
 Get the previous node, or nullptr for the list head.
 
VPRecipeBasegetNextNode ()
 Get the next node, or nullptr for the list tail.
 
const VPRecipeBasegetNextNode () const
 Get the next node, or nullptr for the list tail.
 
- Public Member Functions inherited from llvm::ilist_node_impl< ilist_detail::compute_node_options< T, Options... >::type >
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< NodeTy, ParentTy >
const ParentTy * getParent () const
 
ParentTy * getParent ()
 
void setParent (ParentTy *Parent)
 
- Public Member Functions inherited from llvm::VPDef
 VPDef (const unsigned char SC)
 
virtual ~VPDef ()
 
VPValuegetVPSingleValue ()
 Returns the only VPValue defined by the VPDef.
 
const VPValuegetVPSingleValue () const
 
VPValuegetVPValue (unsigned I)
 Returns the VPValue with index I defined by the VPDef.
 
const VPValuegetVPValue (unsigned I) const
 
ArrayRef< VPValue * > definedValues ()
 Returns an ArrayRef of the values defined by the VPDef.
 
ArrayRef< VPValue * > definedValues () const
 Returns an ArrayRef of the values defined by the VPDef.
 
unsigned getNumDefinedValues () const
 Returns the number of values defined by the VPDef.
 
unsigned getVPDefID () const
 
void dump () const
 Dump the VPDef to stderr (for debugging).
 
virtual void print (raw_ostream &O, const Twine &Indent, VPSlotTracker &SlotTracker) const =0
 Each concrete VPDef prints itself.
 
- Public Member Functions inherited from llvm::VPUser
 VPUser ()=delete
 
 VPUser (const VPUser &)=delete
 
VPUseroperator= (const VPUser &)=delete
 
virtual ~VPUser ()
 
void addOperand (VPValue *Operand)
 
unsigned getNumOperands () const
 
VPValuegetOperand (unsigned N) const
 
void setOperand (unsigned I, VPValue *New)
 
operand_iterator op_begin ()
 
const_operand_iterator op_begin () const
 
operand_iterator op_end ()
 
const_operand_iterator op_end () const
 
operand_range operands ()
 
const_operand_range operands () const
 
virtual bool usesScalars (const VPValue *Op) const
 Returns true if the VPUser uses scalars of operand Op.
 
virtual bool onlyFirstLaneUsed (const VPValue *Op) const
 Returns true if the VPUser only uses the first lane of operand Op.
 
virtual bool onlyFirstPartUsed (const VPValue *Op) const
 Returns true if the VPUser only uses the first part of operand Op.
 
- Public Member Functions inherited from llvm::VPValue
ValuegetUnderlyingValue () const
 Return the underlying Value attached to this VPValue.
 
 VPValue (Value *UV=nullptr)
 Create a live-in VPValue.
 
 VPValue (VPDef *Def, Value *UV=nullptr)
 Create a VPValue for a Def which is a subclass of VPValue.
 
 VPValue (Value *UV, VPDef *Def)
 Create a VPValue for a Def which defines multiple values.
 
 VPValue (const VPValue &)=delete
 
VPValueoperator= (const VPValue &)=delete
 
virtual ~VPValue ()
 
unsigned getVPValueID () const
 
void printAsOperand (raw_ostream &OS, VPSlotTracker &Tracker) const
 
void print (raw_ostream &OS, VPSlotTracker &Tracker) const
 
void dump () const
 Dump the value to stderr (for debugging).
 
unsigned getNumUsers () const
 
void addUser (VPUser &User)
 
void removeUser (VPUser &User)
 Remove a single User from the list of users.
 
user_iterator user_begin ()
 
const_user_iterator user_begin () const
 
user_iterator user_end ()
 
const_user_iterator user_end () const
 
user_range users ()
 
const_user_range users () const
 
bool hasMoreThanOneUniqueUser () const
 Returns true if the value has more than one unique user.
 
void replaceAllUsesWith (VPValue *New)
 
void replaceUsesWithIf (VPValue *New, llvm::function_ref< bool(VPUser &U, unsigned Idx)> ShouldReplace)
 Go through the uses list for this VPValue and make each use point to New if the callback ShouldReplace returns true for the given use specified by a pair of (VPUser, the use index).
 
VPRecipeBasegetDefiningRecipe ()
 Returns the recipe defining this VPValue or nullptr if it is not defined by a recipe, i.e.
 
const VPRecipeBasegetDefiningRecipe () const
 
bool hasDefiningRecipe () const
 Returns true if this VPValue is defined by a recipe.
 
bool isLiveIn () const
 Returns true if this VPValue is a live-in, i.e. defined outside the VPlan.
 
ValuegetLiveInIRValue ()
 Returns the underlying IR value, if this VPValue is defined outside the scope of VPlan.
 
const ValuegetLiveInIRValue () const
 
bool isDefinedOutsideLoopRegions () const
 Returns true if the VPValue is defined outside any loop region.
 
void setUnderlyingValue (Value *Val)
 

Friends

class VPlanSlp
 

Additional Inherited Members

- Static Public Member Functions inherited from llvm::VPRecipeWithIRFlags
static bool classof (const VPRecipeBase *R)
 
static bool classof (const VPUser *U)
 
- Static Public Member Functions inherited from llvm::VPSingleDefRecipe
static bool classof (const VPRecipeBase *R)
 
static bool classof (const VPUser *U)
 
- Static Public Member Functions inherited from llvm::VPRecipeBase
static bool classof (const VPDef *D)
 Method to support type inquiry through isa, cast, and dyn_cast.
 
static bool classof (const VPUser *U)
 
- Protected Types inherited from llvm::ilist_node_impl< ilist_detail::compute_node_options< T, Options... >::type >
using self_iterator = typename ilist_select_iterator_type< OptionsT::has_iterator_bits, ilist_detail::compute_node_options< T, Options... >::type, false, false >::type
 
using const_self_iterator = typename ilist_select_iterator_type< OptionsT::has_iterator_bits, ilist_detail::compute_node_options< T, Options... >::type, false, true >::type
 
using reverse_self_iterator = typename ilist_select_iterator_type< OptionsT::has_iterator_bits, ilist_detail::compute_node_options< T, Options... >::type, true, false >::type
 
using const_reverse_self_iterator = typename ilist_select_iterator_type< OptionsT::has_iterator_bits, ilist_detail::compute_node_options< T, Options... >::type, true, true >::type
 
- Protected Member Functions inherited from llvm::VPRecipeWithIRFlags
void transferFlags (VPRecipeWithIRFlags &Other)
 
template<typename IterT >
 VPRecipeWithIRFlags (const unsigned char SC, IterT Operands, GEPNoWrapFlags GEPFlags, DebugLoc DL={})
 
virtual InstructionCost computeCost (ElementCount VF, VPCostContext &Ctx) const
 Compute the cost of this recipe either using a recipe's specialized implementation or using the legacy cost model and the underlying instructions.
 
- Protected Member Functions inherited from llvm::ilist_node_with_parent< VPRecipeBase, VPBasicBlock >
 ilist_node_with_parent ()=default
 
- Protected Member Functions inherited from llvm::ilist_node_impl< ilist_detail::compute_node_options< T, Options... >::type >
 ilist_node_impl ()=default
 
- Protected Member Functions inherited from llvm::VPUser
void printOperands (raw_ostream &O, VPSlotTracker &SlotTracker) const
 Print the operands to O.
 
 VPUser (ArrayRef< VPValue * > Operands)
 
 VPUser (std::initializer_list< VPValue * > Operands)
 
template<typename IterT >
 VPUser (iterator_range< IterT > Operands)
 
- Protected Member Functions inherited from llvm::VPValue
 VPValue (const unsigned char SC, Value *UV=nullptr, VPDef *Def=nullptr)
 
- Protected Member Functions inherited from llvm::VPUnrollPartAccessor< 1 >
VPValuegetUnrollPartOperand (VPUser &U) const
 Return the VPValue operand containing the unroll part or null if there is no such operand.
 
unsigned getUnrollPart (VPUser &U) const
 Return the unroll part.
 
- Protected Attributes inherited from llvm::VPValue
ValueUnderlyingVal
 
VPDefDef
 Pointer to the VPDef that defines this VPValue.
 

Detailed Description

This is a concrete Recipe that models a single VPlan-level instruction.

While as any Recipe it may generate a sequence of IR instructions when executed, these instructions would always form a single-def expression as the VPInstruction is also a single def-use vertex.

Definition at line 1196 of file VPlan.h.

Member Enumeration Documentation

◆ anonymous enum

anonymous enum

VPlan opcodes, extending LLVM IR with idiomatics instructions.

Enumerator
FirstOrderRecurrenceSplice 
Not 
SLPLoad 
SLPStore 
ActiveLaneMask 
ExplicitVectorLength 
ResumePhi 

Creates a scalar phi in a leaf VPBB with a single predecessor in VPlan.

The first operand is the incoming value from the predecessor in VPlan, the second operand is the incoming value for all other predecessors (which are currently not modeled in VPlan).

CalculateTripCountMinusVF 
CanonicalIVIncrementForPart 
BranchOnCount 
BranchOnCond 
ComputeReductionResult 
ExtractFromEnd 
LogicalAnd 
PtrAdd 
AnyOf 

Definition at line 1202 of file VPlan.h.

Constructor & Destructor Documentation

◆ VPInstruction() [1/7]

llvm::VPInstruction::VPInstruction ( unsigned  Opcode,
ArrayRef< VPValue * >  Operands,
DebugLoc  DL,
const Twine Name = "" 
)
inline

Definition at line 1272 of file VPlan.h.

◆ VPInstruction() [2/7]

llvm::VPInstruction::VPInstruction ( unsigned  Opcode,
std::initializer_list< VPValue * >  Operands,
DebugLoc  DL = {},
const Twine Name = "" 
)
inline

Definition at line 1277 of file VPlan.h.

◆ VPInstruction() [3/7]

VPInstruction::VPInstruction ( unsigned  Opcode,
CmpInst::Predicate  Pred,
VPValue A,
VPValue B,
DebugLoc  DL = {},
const Twine Name = "" 
)

Definition at line 328 of file VPlanRecipes.cpp.

References A, and B.

◆ VPInstruction() [4/7]

llvm::VPInstruction::VPInstruction ( unsigned  Opcode,
std::initializer_list< VPValue * >  Operands,
WrapFlagsTy  WrapFlags,
DebugLoc  DL = {},
const Twine Name = "" 
)
inline

Definition at line 1284 of file VPlan.h.

◆ VPInstruction() [5/7]

llvm::VPInstruction::VPInstruction ( unsigned  Opcode,
std::initializer_list< VPValue * >  Operands,
DisjointFlagsTy  DisjointFlag,
DebugLoc  DL = {},
const Twine Name = "" 
)
inline

Definition at line 1289 of file VPlan.h.

◆ VPInstruction() [6/7]

llvm::VPInstruction::VPInstruction ( VPValue Ptr,
VPValue Offset,
GEPNoWrapFlags  Flags,
DebugLoc  DL = {},
const Twine Name = "" 
)
inline

Definition at line 1297 of file VPlan.h.

◆ VPInstruction() [7/7]

VPInstruction::VPInstruction ( unsigned  Opcode,
std::initializer_list< VPValue * >  Operands,
FastMathFlags  FMFs,
DebugLoc  DL = {},
const Twine Name = "" 
)

Definition at line 338 of file VPlanRecipes.cpp.

References assert().

Member Function Documentation

◆ clone()

VPInstruction * llvm::VPInstruction::clone ( )
inlineoverridevirtual

Clone the current recipe.

Implements llvm::VPSingleDefRecipe.

Definition at line 1308 of file VPlan.h.

References llvm::VPRecipeBase::getDebugLoc(), Name, Operands, and llvm::VPUser::operands().

◆ computeCost()

InstructionCost llvm::VPInstruction::computeCost ( ElementCount  VF,
VPCostContext Ctx 
) const
inlineoverridevirtual

Return the cost of this VPInstruction.

Reimplemented from llvm::VPRecipeBase.

Definition at line 1323 of file VPlan.h.

◆ dump()

void VPInstruction::dump ( ) const

Print the VPInstruction to dbgs() (for debugging).

Definition at line 756 of file VPlanRecipes.cpp.

References llvm::dbgs(), llvm::VPRecipeBase::getParent(), and print().

◆ execute()

void VPInstruction::execute ( VPTransformState State)
overridevirtual

◆ getName()

StringRef llvm::VPInstruction::getName ( ) const
inline

Returns the symbolic name assigned to the VPInstruction.

Definition at line 1375 of file VPlan.h.

References Name.

◆ getOpcode()

unsigned llvm::VPInstruction::getOpcode ( ) const
inline

◆ hasResult()

bool llvm::VPInstruction::hasResult ( ) const
inline

Definition at line 1338 of file VPlan.h.

References BranchOnCond, BranchOnCount, and getOpcode().

Referenced by execute(), and print().

◆ isSingleScalar()

bool VPInstruction::isSingleScalar ( ) const

Returns true if this VPInstruction's operands are single scalars and the result is also a single scalar.

Definition at line 660 of file VPlanRecipes.cpp.

References getOpcode(), and ResumePhi.

Referenced by execute().

◆ isVectorToScalar()

bool VPInstruction::isVectorToScalar ( ) const

Returns true if this VPInstruction produces a scalar value from a vector, e.g.

by performing a reduction or extracting a lane.

Definition at line 654 of file VPlanRecipes.cpp.

References AnyOf, ComputeReductionResult, ExtractFromEnd, and getOpcode().

Referenced by execute().

◆ onlyFirstLaneUsed()

bool VPInstruction::onlyFirstLaneUsed ( const VPValue Op) const
overridevirtual

◆ onlyFirstPartUsed()

bool VPInstruction::onlyFirstPartUsed ( const VPValue Op) const
overridevirtual

Returns true if the recipe only uses the first part of operand Op.

Reimplemented from llvm::VPUser.

Definition at line 736 of file VPlanRecipes.cpp.

References assert(), BranchOnCond, BranchOnCount, CanonicalIVIncrementForPart, getOpcode(), llvm::is_contained(), llvm::Instruction::isBinaryOp(), llvm_unreachable, llvm::vputils::onlyFirstPartUsed(), and llvm::VPUser::operands().

◆ print()

void VPInstruction::print ( raw_ostream O,
const Twine Indent,
VPSlotTracker SlotTracker 
) const
overridevirtual

Friends And Related Function Documentation

◆ VPlanSlp

friend class VPlanSlp
friend

Definition at line 1198 of file VPlan.h.


The documentation for this class was generated from the following files: