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llvm::MachineMemOperand Class Reference

A description of a memory reference used in the backend. More...

#include "llvm/CodeGen/MachineMemOperand.h"

Public Types

enum  Flags : uint16_t {
  MONone = 0, MOLoad = 1u << 0, MOStore = 1u << 1, MOVolatile = 1u << 2,
  MONonTemporal = 1u << 3, MODereferenceable = 1u << 4, MOInvariant = 1u << 5, MOTargetFlag1 = 1u << 6,
  MOTargetFlag2 = 1u << 7, MOTargetFlag3 = 1u << 8
}
 Flags values. These may be or'd together. More...
 

Public Member Functions

 MachineMemOperand (MachinePointerInfo PtrInfo, Flags flags, uint64_t s, unsigned base_alignment, const AAMDNodes &AAInfo=AAMDNodes(), const MDNode *Ranges=nullptr, SyncScope::ID SSID=SyncScope::System, AtomicOrdering Ordering=AtomicOrdering::NotAtomic, AtomicOrdering FailureOrdering=AtomicOrdering::NotAtomic)
 Construct a MachineMemOperand object with the specified PtrInfo, flags, size, and base alignment. More...
 
const MachinePointerInfogetPointerInfo () const
 
const ValuegetValue () const
 Return the base address of the memory access. More...
 
const PseudoSourceValuegetPseudoValue () const
 
const void * getOpaqueValue () const
 
Flags getFlags () const
 Return the raw flags of the source value,. More...
 
void setFlags (Flags f)
 Bitwise OR the current flags with the given flags. More...
 
int64_t getOffset () const
 For normal values, this is a byte offset added to the base address. More...
 
unsigned getAddrSpace () const
 
uint64_t getSize () const
 Return the size in bytes of the memory reference. More...
 
uint64_t getAlignment () const
 Return the minimum known alignment in bytes of the actual memory reference. More...
 
uint64_t getBaseAlignment () const
 Return the minimum known alignment in bytes of the base address, without the offset. More...
 
AAMDNodes getAAInfo () const
 Return the AA tags for the memory reference. More...
 
const MDNodegetRanges () const
 Return the range tag for the memory reference. More...
 
SyncScope::ID getSyncScopeID () const
 Returns the synchronization scope ID for this memory operation. More...
 
AtomicOrdering getOrdering () const
 Return the atomic ordering requirements for this memory operation. More...
 
AtomicOrdering getFailureOrdering () const
 For cmpxchg atomic operations, return the atomic ordering requirements when store does not occur. More...
 
bool isLoad () const
 
bool isStore () const
 
bool isVolatile () const
 
bool isNonTemporal () const
 
bool isDereferenceable () const
 
bool isInvariant () const
 
bool isAtomic () const
 Returns true if this operation has an atomic ordering requirement of unordered or higher, false otherwise. More...
 
bool isUnordered () const
 Returns true if this memory operation doesn't have any ordering constraints other than normal aliasing. More...
 
void refineAlignment (const MachineMemOperand *MMO)
 Update this MachineMemOperand to reflect the alignment of MMO, if it has a greater alignment. More...
 
void setValue (const Value *NewSV)
 Change the SourceValue for this MachineMemOperand. More...
 
void setValue (const PseudoSourceValue *NewSV)
 
void setOffset (int64_t NewOffset)
 
void Profile (FoldingSetNodeID &ID) const
 Profile - Gather unique data for the object. More...
 
void print (raw_ostream &OS) const
 Support for operator<<. More...
 
void print (raw_ostream &OS, ModuleSlotTracker &MST) const
 

Friends

bool operator== (const MachineMemOperand &LHS, const MachineMemOperand &RHS)
 
bool operator!= (const MachineMemOperand &LHS, const MachineMemOperand &RHS)
 

Detailed Description

A description of a memory reference used in the backend.

Instead of holding a StoreInst or LoadInst, this class holds the address Value of the reference along with a byte size and offset. This allows it to describe lowered loads and stores. Also, the special PseudoSourceValue objects can be used to represent loads and stores to memory locations that aren't explicit in the regular LLVM IR.

Definition at line 103 of file MachineMemOperand.h.

Member Enumeration Documentation

◆ Flags

Flags values. These may be or'd together.

Enumerator
MONone 
MOLoad 

The memory access reads data.

MOStore 

The memory access writes data.

MOVolatile 

The memory access is volatile.

MONonTemporal 

The memory access is non-temporal.

MODereferenceable 

The memory access is dereferenceable (i.e., doesn't trap).

MOInvariant 

The memory access always returns the same value (or traps).

MOTargetFlag1 
MOTargetFlag2 
MOTargetFlag3 

Definition at line 106 of file MachineMemOperand.h.

Constructor & Destructor Documentation

◆ MachineMemOperand()

MachineMemOperand::MachineMemOperand ( MachinePointerInfo  PtrInfo,
Flags  flags,
uint64_t  s,
unsigned  base_alignment,
const AAMDNodes AAInfo = AAMDNodes(),
const MDNode Ranges = nullptr,
SyncScope::ID  SSID = SyncScope::System,
AtomicOrdering  Ordering = AtomicOrdering::NotAtomic,
AtomicOrdering  FailureOrdering = AtomicOrdering::NotAtomic 
)

Construct a MachineMemOperand object with the specified PtrInfo, flags, size, and base alignment.

For atomic operations the synchronization scope and atomic ordering requirements must also be specified. For cmpxchg atomic operations the atomic ordering requirements when store does not occur must also be specified.

Definition at line 632 of file MachineInstr.cpp.

Member Function Documentation

◆ getAAInfo()

AAMDNodes llvm::MachineMemOperand::getAAInfo ( ) const
inline

◆ getAddrSpace()

unsigned llvm::MachineMemOperand::getAddrSpace ( ) const
inline

Definition at line 195 of file MachineMemOperand.h.

References llvm::MachinePointerInfo::getAddrSpace().

◆ getAlignment()

uint64_t MachineMemOperand::getAlignment ( ) const

Return the minimum known alignment in bytes of the actual memory reference.

getAlignment - Return the minimum known alignment in bytes of the actual memory reference.

Definition at line 682 of file MachineInstr.cpp.

Referenced by llvm::PPCTargetLowering::expandVSXLoadForLE(), llvm::PPCTargetLowering::expandVSXStoreForLE(), llvm::MemSDNode::getAlignment(), getStoreTarget(), isMemoryOp(), llvm::X86InstrInfo::loadRegFromAddr(), and llvm::X86InstrInfo::storeRegToAddr().

◆ getBaseAlignment()

uint64_t llvm::MachineMemOperand::getBaseAlignment ( ) const
inline

Return the minimum known alignment in bytes of the base address, without the offset.

Definition at line 206 of file MachineMemOperand.h.

Referenced by canFoldInAddressingMode(), llvm::MachineFunction::getMachineMemOperand(), llvm::MemSDNode::getOriginalAlignment(), and llvm::MIPrinter::print().

◆ getFailureOrdering()

AtomicOrdering llvm::MachineMemOperand::getFailureOrdering ( ) const
inline

For cmpxchg atomic operations, return the atomic ordering requirements when store does not occur.

Definition at line 228 of file MachineMemOperand.h.

Referenced by llvm::MachineFunction::getMachineMemOperand(), and llvm::MIPrinter::print().

◆ getFlags()

Flags llvm::MachineMemOperand::getFlags ( ) const
inline

◆ getOffset()

int64_t llvm::MachineMemOperand::getOffset ( ) const
inline

◆ getOpaqueValue()

const void* llvm::MachineMemOperand::getOpaqueValue ( ) const
inline

◆ getOrdering()

AtomicOrdering llvm::MachineMemOperand::getOrdering ( ) const
inline

Return the atomic ordering requirements for this memory operation.

For cmpxchg atomic operations, return the atomic ordering requirements when store occurs.

Definition at line 222 of file MachineMemOperand.h.

Referenced by llvm::MachineFunction::getMachineMemOperand(), llvm::MemSDNode::getOrdering(), and llvm::MIPrinter::print().

◆ getPointerInfo()

const MachinePointerInfo& llvm::MachineMemOperand::getPointerInfo ( ) const
inline

◆ getPseudoValue()

const PseudoSourceValue* llvm::MachineMemOperand::getPseudoValue ( ) const
inline

◆ getRanges()

const MDNode* llvm::MachineMemOperand::getRanges ( ) const
inline

Return the range tag for the memory reference.

Definition at line 212 of file MachineMemOperand.h.

Referenced by llvm::MachineFunction::getMachineMemOperand(), llvm::MemSDNode::getRanges(), and llvm::MIPrinter::print().

◆ getSize()

uint64_t llvm::MachineMemOperand::getSize ( ) const
inline

◆ getSyncScopeID()

SyncScope::ID llvm::MachineMemOperand::getSyncScopeID ( ) const
inline

Returns the synchronization scope ID for this memory operation.

Definition at line 215 of file MachineMemOperand.h.

Referenced by llvm::MachineFunction::getMachineMemOperand(), llvm::MemSDNode::getSyncScopeID(), and llvm::MIPrinter::print().

◆ getValue()

const Value* llvm::MachineMemOperand::getValue ( ) const
inline

Return the base address of the memory access.

This may either be a normal LLVM IR Value, or one of the special values used in CodeGen. Special values are those obtained via PseudoSourceValue::getFixedStack(int), PseudoSourceValue::getStack, and other PseudoSourceValue member functions which return objects which stand for frame/stack pointer relative references and other special references which are not representable in the high-level IR.

Definition at line 177 of file MachineMemOperand.h.

References llvm::PointerUnion< PT1, PT2 >::dyn_cast(), and llvm::MachinePointerInfo::V.

Referenced by llvm::SIInstrInfo::areMemAccessesTriviallyDisjoint(), llvm::SystemZInstrInfo::areMemAccessesTriviallyDisjoint(), canLowerToLDG(), ConstantAddressBlock(), llvm::PPCHazardRecognizer970::EmitInstruction(), findBaseOffset(), getCodeAddrSpace(), llvm::PPCHazardRecognizer970::getHazardType(), llvm::MachineFunction::getMachineMemOperand(), getStoreTarget(), getUnderlyingObjects(), isInstrUniform(), llvm::SITargetLowering::isMemOpHasNoClobberedMemOperand(), llvm::AVR::isProgramMemoryAccess(), llvm::AMDGPU::isUniformMMO(), maskMatters(), llvm::MachineInstr::mayAlias(), memOpsHaveSameBasePtr(), llvm::VLIWPacketizerList::PacketizeMIs(), and llvm::MIPrinter::print().

◆ isAtomic()

bool llvm::MachineMemOperand::isAtomic ( ) const
inline

Returns true if this operation has an atomic ordering requirement of unordered or higher, false otherwise.

Definition at line 241 of file MachineMemOperand.h.

References llvm::NotAtomic.

◆ isDereferenceable()

bool llvm::MachineMemOperand::isDereferenceable ( ) const
inline

Definition at line 236 of file MachineMemOperand.h.

Referenced by llvm::MemSDNode::MemSDNode(), and llvm::MIPrinter::print().

◆ isInvariant()

bool llvm::MachineMemOperand::isInvariant ( ) const
inline

Definition at line 237 of file MachineMemOperand.h.

Referenced by llvm::MemSDNode::MemSDNode(), and llvm::MIPrinter::print().

◆ isLoad()

bool llvm::MachineMemOperand::isLoad ( ) const
inline

Definition at line 232 of file MachineMemOperand.h.

Referenced by llvm::MIPrinter::print(), and llvm::MemSDNode::readMem().

◆ isNonTemporal()

bool llvm::MachineMemOperand::isNonTemporal ( ) const
inline

◆ isStore()

bool llvm::MachineMemOperand::isStore ( ) const
inline

Definition at line 233 of file MachineMemOperand.h.

Referenced by llvm::MIPrinter::print(), and llvm::MemSDNode::writeMem().

◆ isUnordered()

bool llvm::MachineMemOperand::isUnordered ( ) const
inline

Returns true if this memory operation doesn't have any ordering constraints other than normal aliasing.

Volatile and atomic memory operations can't be reordered.

Currently, we don't model the difference between volatile and atomic operations. They should retain their ordering relative to all memory operations.

Definition at line 250 of file MachineMemOperand.h.

References isVolatile().

Referenced by llvm::MachineInstr::hasOrderedMemoryRef().

◆ isVolatile()

bool llvm::MachineMemOperand::isVolatile ( ) const
inline

◆ print() [1/2]

void MachineMemOperand::print ( raw_ostream OS) const

Support for operator<<.

Definition at line 686 of file MachineInstr.cpp.

Referenced by llvm::operator<<().

◆ print() [2/2]

void MachineMemOperand::print ( raw_ostream OS,
ModuleSlotTracker MST 
) const

Definition at line 690 of file MachineInstr.cpp.

◆ Profile()

void MachineMemOperand::Profile ( FoldingSetNodeID ID) const

Profile - Gather unique data for the object.

Definition at line 657 of file MachineInstr.cpp.

◆ refineAlignment()

void MachineMemOperand::refineAlignment ( const MachineMemOperand MMO)

Update this MachineMemOperand to reflect the alignment of MMO, if it has a greater alignment.

This must only be used when the new alignment applies to all users of this MachineMemOperand.

Definition at line 665 of file MachineInstr.cpp.

Referenced by llvm::MemSDNode::refineAlignment().

◆ setFlags()

void llvm::MachineMemOperand::setFlags ( Flags  f)
inline

Bitwise OR the current flags with the given flags.

Definition at line 189 of file MachineMemOperand.h.

◆ setOffset()

void llvm::MachineMemOperand::setOffset ( int64_t  NewOffset)
inline

Definition at line 262 of file MachineMemOperand.h.

References llvm::MachinePointerInfo::Offset, and print().

◆ setValue() [1/2]

void llvm::MachineMemOperand::setValue ( const Value NewSV)
inline

Change the SourceValue for this MachineMemOperand.

This should only be used when an object is being relocated and all references to it are being updated.

Definition at line 260 of file MachineMemOperand.h.

References llvm::MachinePointerInfo::V.

◆ setValue() [2/2]

void llvm::MachineMemOperand::setValue ( const PseudoSourceValue NewSV)
inline

Definition at line 261 of file MachineMemOperand.h.

References llvm::MachinePointerInfo::V.

Friends And Related Function Documentation

◆ operator!=

bool operator!= ( const MachineMemOperand LHS,
const MachineMemOperand RHS 
)
friend

Definition at line 287 of file MachineMemOperand.h.

◆ operator==

bool operator== ( const MachineMemOperand LHS,
const MachineMemOperand RHS 
)
friend

Definition at line 274 of file MachineMemOperand.h.


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