LLVM  4.0.0
Classes | Public Member Functions | List of all members
llvm::MachineFrameInfo Class Reference

The MachineFrameInfo class represents an abstract stack frame until prolog/epilog code is inserted. More...

#include <MachineFrameInfo.h>

Public Member Functions

 MachineFrameInfo (unsigned StackAlignment, bool StackRealignable, bool ForcedRealign)
 
bool hasStackObjects () const
 Return true if there are any stack objects in this function. More...
 
bool hasVarSizedObjects () const
 This method may be called any time after instruction selection is complete to determine if the stack frame for this function contains any variable sized objects. More...
 
int getStackProtectorIndex () const
 Return the index for the stack protector object. More...
 
void setStackProtectorIndex (int I)
 
bool hasStackProtectorIndex () const
 
int getFunctionContextIndex () const
 Return the index for the function context object. More...
 
void setFunctionContextIndex (int I)
 
bool isFrameAddressTaken () const
 This method may be called any time after instruction selection is complete to determine if there is a call to @llvm.frameaddress in this function. More...
 
void setFrameAddressIsTaken (bool T)
 
bool isReturnAddressTaken () const
 This method may be called any time after instruction selection is complete to determine if there is a call to @llvm.returnaddress in this function. More...
 
void setReturnAddressIsTaken (bool s)
 
bool hasStackMap () const
 This method may be called any time after instruction selection is complete to determine if there is a call to builtin @llvm.experimental.stackmap. More...
 
void setHasStackMap (bool s=true)
 
bool hasPatchPoint () const
 This method may be called any time after instruction selection is complete to determine if there is a call to builtin @llvm.experimental.patchpoint. More...
 
void setHasPatchPoint (bool s=true)
 
int getObjectIndexBegin () const
 Return the minimum frame object index. More...
 
int getObjectIndexEnd () const
 Return one past the maximum frame object index. More...
 
unsigned getNumFixedObjects () const
 Return the number of fixed objects. More...
 
unsigned getNumObjects () const
 Return the number of objects. More...
 
void mapLocalFrameObject (int ObjectIndex, int64_t Offset)
 Map a frame index into the local object block. More...
 
std::pair< int, int64_t > getLocalFrameObjectMap (int i) const
 Get the local offset mapping for a for an object. More...
 
int64_t getLocalFrameObjectCount () const
 Return the number of objects allocated into the local object block. More...
 
void setLocalFrameSize (int64_t sz)
 Set the size of the local object blob. More...
 
int64_t getLocalFrameSize () const
 Get the size of the local object blob. More...
 
void setLocalFrameMaxAlign (unsigned Align)
 Required alignment of the local object blob, which is the strictest alignment of any object in it. More...
 
unsigned getLocalFrameMaxAlign () const
 Return the required alignment of the local object blob. More...
 
bool getUseLocalStackAllocationBlock () const
 Get whether the local allocation blob should be allocated together or let PEI allocate the locals in it directly. More...
 
void setUseLocalStackAllocationBlock (bool v)
 setUseLocalStackAllocationBlock - Set whether the local allocation blob should be allocated together or let PEI allocate the locals in it directly. More...
 
bool isObjectPreAllocated (int ObjectIdx) const
 Return true if the object was pre-allocated into the local block. More...
 
int64_t getObjectSize (int ObjectIdx) const
 Return the size of the specified object. More...
 
void setObjectSize (int ObjectIdx, int64_t Size)
 Change the size of the specified stack object. More...
 
unsigned getObjectAlignment (int ObjectIdx) const
 Return the alignment of the specified stack object. More...
 
void setObjectAlignment (int ObjectIdx, unsigned Align)
 setObjectAlignment - Change the alignment of the specified stack object. More...
 
const AllocaInstgetObjectAllocation (int ObjectIdx) const
 Return the underlying Alloca of the specified stack object if it exists. More...
 
int64_t getObjectOffset (int ObjectIdx) const
 Return the assigned stack offset of the specified object from the incoming stack pointer. More...
 
bool isObjectZExt (int ObjectIdx) const
 
void setObjectZExt (int ObjectIdx, bool IsZExt)
 
bool isObjectSExt (int ObjectIdx) const
 
void setObjectSExt (int ObjectIdx, bool IsSExt)
 
void setObjectOffset (int ObjectIdx, int64_t SPOffset)
 Set the stack frame offset of the specified object. More...
 
uint64_t getStackSize () const
 Return the number of bytes that must be allocated to hold all of the fixed size frame objects. More...
 
void setStackSize (uint64_t Size)
 Set the size of the stack. More...
 
unsigned estimateStackSize (const MachineFunction &MF) const
 Estimate and return the size of the stack frame. More...
 
int getOffsetAdjustment () const
 Return the correction for frame offsets. More...
 
void setOffsetAdjustment (int Adj)
 Set the correction for frame offsets. More...
 
unsigned getMaxAlignment () const
 Return the alignment in bytes that this function must be aligned to, which is greater than the default stack alignment provided by the target. More...
 
void ensureMaxAlignment (unsigned Align)
 Make sure the function is at least Align bytes aligned. More...
 
bool adjustsStack () const
 Return true if this function adjusts the stack – e.g., when calling another function. More...
 
void setAdjustsStack (bool V)
 
bool hasCalls () const
 Return true if the current function has any function calls. More...
 
void setHasCalls (bool V)
 
bool hasOpaqueSPAdjustment () const
 Returns true if the function contains opaque dynamic stack adjustments. More...
 
void setHasOpaqueSPAdjustment (bool B)
 
bool hasCopyImplyingStackAdjustment () const
 Returns true if the function contains operations which will lower down to instructions which manipulate the stack pointer. More...
 
void setHasCopyImplyingStackAdjustment (bool B)
 
bool hasVAStart () const
 Returns true if the function calls the llvm.va_start intrinsic. More...
 
void setHasVAStart (bool B)
 
bool hasMustTailInVarArgFunc () const
 Returns true if the function is variadic and contains a musttail call. More...
 
void setHasMustTailInVarArgFunc (bool B)
 
bool hasTailCall () const
 Returns true if the function contains a tail call. More...
 
void setHasTailCall ()
 
unsigned getMaxCallFrameSize () const
 Return the maximum size of a call frame that must be allocated for an outgoing function call. More...
 
void setMaxCallFrameSize (unsigned S)
 
int CreateFixedObject (uint64_t Size, int64_t SPOffset, bool Immutable, bool isAliased=false)
 Create a new object at a fixed location on the stack. More...
 
int CreateFixedSpillStackObject (uint64_t Size, int64_t SPOffset, bool Immutable=false)
 Create a spill slot at a fixed location on the stack. More...
 
bool isFixedObjectIndex (int ObjectIdx) const
 Returns true if the specified index corresponds to a fixed stack object. More...
 
bool isAliasedObjectIndex (int ObjectIdx) const
 Returns true if the specified index corresponds to an object that might be pointed to by an LLVM IR value. More...
 
bool isImmutableObjectIndex (int ObjectIdx) const
 isImmutableObjectIndex - Returns true if the specified index corresponds to an immutable object. More...
 
bool isSpillSlotObjectIndex (int ObjectIdx) const
 Returns true if the specified index corresponds to a spill slot. More...
 
bool isStatepointSpillSlotObjectIndex (int ObjectIdx) const
 
bool isDeadObjectIndex (int ObjectIdx) const
 Returns true if the specified index corresponds to a dead object. More...
 
bool isVariableSizedObjectIndex (int ObjectIdx) const
 Returns true if the specified index corresponds to a variable sized object. More...
 
void markAsStatepointSpillSlotObjectIndex (int ObjectIdx)
 
int CreateStackObject (uint64_t Size, unsigned Alignment, bool isSS, const AllocaInst *Alloca=nullptr)
 Create a new statically sized stack object, returning a nonnegative identifier to represent it. More...
 
int CreateSpillStackObject (uint64_t Size, unsigned Alignment)
 Create a new statically sized stack object that represents a spill slot, returning a nonnegative identifier to represent it. More...
 
void RemoveStackObject (int ObjectIdx)
 Remove or mark dead a statically sized stack object. More...
 
int CreateVariableSizedObject (unsigned Alignment, const AllocaInst *Alloca)
 Notify the MachineFrameInfo object that a variable sized object has been created. More...
 
const std::vector
< CalleeSavedInfo > & 
getCalleeSavedInfo () const
 Returns a reference to call saved info vector for the current function. More...
 
void setCalleeSavedInfo (const std::vector< CalleeSavedInfo > &CSI)
 Used by prolog/epilog inserter to set the function's callee saved information. More...
 
bool isCalleeSavedInfoValid () const
 Has the callee saved info been calculated yet? More...
 
void setCalleeSavedInfoValid (bool v)
 
MachineBasicBlockgetSavePoint () const
 
void setSavePoint (MachineBasicBlock *NewSave)
 
MachineBasicBlockgetRestorePoint () const
 
void setRestorePoint (MachineBasicBlock *NewRestore)
 
BitVector getPristineRegs (const MachineFunction &MF) const
 Return a set of physical registers that are pristine. More...
 
void print (const MachineFunction &MF, raw_ostream &OS) const
 Used by the MachineFunction printer to print information about stack objects. More...
 
void dump (const MachineFunction &MF) const
 dump - Print the function to stderr. More...
 

Detailed Description

The MachineFrameInfo class represents an abstract stack frame until prolog/epilog code is inserted.

This class is key to allowing stack frame representation optimizations, such as frame pointer elimination. It also allows more mundane (but still important) optimizations, such as reordering of abstract objects on the stack frame.

To support this, the class assigns unique integer identifiers to stack objects requested clients. These identifiers are negative integers for fixed stack objects (such as arguments passed on the stack) or nonnegative for objects that may be reordered. Instructions which refer to stack objects use a special MO_FrameIndex operand to represent these frame indexes.

Because this class keeps track of all references to the stack frame, it knows when a variable sized object is allocated on the stack. This is the sole condition which prevents frame pointer elimination, which is an important optimization on register-poor architectures. Because original variable sized alloca's in the source program are the only source of variable sized stack objects, it is safe to decide whether there will be any variable sized objects before all stack objects are known (for example, register allocator spill code never needs variable sized objects).

When prolog/epilog code emission is performed, the final stack frame is built and the machine instructions are modified to refer to the actual stack offsets of the object, eliminating all MO_FrameIndex operands from the program.

Abstract Stack Frame Information

Definition at line 80 of file MachineFrameInfo.h.

Constructor & Destructor Documentation

llvm::MachineFrameInfo::MachineFrameInfo ( unsigned  StackAlignment,
bool  StackRealignable,
bool  ForcedRealign 
)
inlineexplicit

Definition at line 281 of file MachineFrameInfo.h.

Member Function Documentation

bool llvm::MachineFrameInfo::adjustsStack ( ) const
inline

Return true if this function adjusts the stack – e.g., when calling another function.

This is only valid during and after prolog/epilog code insertion.

Definition at line 497 of file MachineFrameInfo.h.

Referenced by llvm::AArch64RegisterInfo::cannotEliminateFrame(), llvm::ARMBaseRegisterInfo::cannotEliminateFrame(), llvm::MIRPrinter::convert(), llvm::PPCFrameLowering::determineFrameLayout(), llvm::X86FrameLowering::emitPrologue(), llvm::MipsFrameLowering::estimateStackSize(), and estimateStackSize().

int MachineFrameInfo::CreateFixedObject ( uint64_t  Size,
int64_t  SPOffset,
bool  Immutable,
bool  isAliased = false 
)
int MachineFrameInfo::CreateFixedSpillStackObject ( uint64_t  Size,
int64_t  SPOffset,
bool  Immutable = false 
)

Create a spill slot at a fixed location on the stack.

Returns an index with a negative value.

Definition at line 841 of file MachineFunction.cpp.

References clampStackAlignment(), and llvm::MinAlign().

Referenced by llvm::X86FrameLowering::assignCalleeSavedSpillSlots(), assignCalleeSavedSpillSlots(), and llvm::MIRParserImpl::initializeFrameInfo().

int MachineFrameInfo::CreateSpillStackObject ( uint64_t  Size,
unsigned  Alignment 
)

Create a new statically sized stack object that represents a spill slot, returning a nonnegative identifier to represent it.

Definition at line 797 of file MachineFunction.cpp.

References clampStackAlignment(), CreateStackObject(), and ensureMaxAlignment().

Referenced by llvm::HexagonFrameLowering::determineCalleeSaves(), and llvm::X86FrameLowering::determineCalleeSaves().

int MachineFrameInfo::CreateStackObject ( uint64_t  Size,
unsigned  Alignment,
bool  isSS,
const AllocaInst Alloca = nullptr 
)
int MachineFrameInfo::CreateVariableSizedObject ( unsigned  Alignment,
const AllocaInst Alloca 
)

Notify the MachineFrameInfo object that a variable sized object has been created.

This must be created whenever a variable sized object is created, whether or not the index returned is actually used.

Definition at line 809 of file MachineFunction.cpp.

References clampStackAlignment(), and ensureMaxAlignment().

Referenced by llvm::MIRParserImpl::initializeFrameInfo(), and llvm::FunctionLoweringInfo::set().

void MachineFrameInfo::dump ( const MachineFunction MF) const

dump - Print the function to stderr.

Definition at line 959 of file MachineFunction.cpp.

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

void MachineFrameInfo::ensureMaxAlignment ( unsigned  Align)
unsigned MachineFrameInfo::estimateStackSize ( const MachineFunction MF) const
const std::vector<CalleeSavedInfo>& llvm::MachineFrameInfo::getCalleeSavedInfo ( ) const
inline
int llvm::MachineFrameInfo::getFunctionContextIndex ( ) const
inline

Return the index for the function context object.

This object is used for SjLj exceptions.

Definition at line 301 of file MachineFrameInfo.h.

unsigned llvm::MachineFrameInfo::getLocalFrameMaxAlign ( ) const
inline

Return the required alignment of the local object blob.

Definition at line 367 of file MachineFrameInfo.h.

Referenced by llvm::ARMBaseRegisterInfo::needsFrameBaseReg(), and llvm::HexagonFrameLowering::processFunctionBeforeFrameFinalized().

int64_t llvm::MachineFrameInfo::getLocalFrameObjectCount ( ) const
inline

Return the number of objects allocated into the local object block.

Definition at line 354 of file MachineFrameInfo.h.

References llvm::SmallVectorTemplateCommon< T, typename >::size().

Referenced by llvm::MIRPrinter::convertStackObjects().

std::pair<int, int64_t> llvm::MachineFrameInfo::getLocalFrameObjectMap ( int  i) const
inline

Get the local offset mapping for a for an object.

Definition at line 347 of file MachineFrameInfo.h.

References assert(), i, and llvm::SmallVectorTemplateCommon< T, typename >::size().

Referenced by llvm::MIRPrinter::convertStackObjects().

int64_t llvm::MachineFrameInfo::getLocalFrameSize ( ) const
inline
unsigned llvm::MachineFrameInfo::getMaxAlignment ( ) const
inline
unsigned llvm::MachineFrameInfo::getMaxCallFrameSize ( ) const
inline

Return the maximum size of a call frame that must be allocated for an outgoing function call.

This is only available if CallFrameSetup/Destroy pseudo instructions are used by the target, and then only during or after prolog/epilog code insertion.

Definition at line 534 of file MachineFrameInfo.h.

Referenced by llvm::MIRPrinter::convert(), llvm::PPCFrameLowering::determineFrameLayout(), llvm::MipsFrameLowering::estimateStackSize(), estimateStackSize(), llvm::MipsSEFrameLowering::hasReservedCallFrame(), llvm::Mips16FrameLowering::hasReservedCallFrame(), llvm::Thumb1FrameLowering::hasReservedCallFrame(), llvm::ARMFrameLowering::hasReservedCallFrame(), llvm::PPCRegisterInfo::lowerDynamicAlloc(), and llvm::PPCRegisterInfo::lowerDynamicAreaOffset().

unsigned llvm::MachineFrameInfo::getNumFixedObjects ( ) const
inline

Return the number of fixed objects.

Definition at line 335 of file MachineFrameInfo.h.

Referenced by llvm::HexagonFrameLowering::hasFP(), and llvm::AVRFrameAnalyzer::runOnMachineFunction().

unsigned llvm::MachineFrameInfo::getNumObjects ( ) const
inline
unsigned llvm::MachineFrameInfo::getObjectAlignment ( int  ObjectIdx) const
inline

Return the alignment of the specified stack object.

Definition at line 404 of file MachineFrameInfo.h.

References assert().

Referenced by llvm::addFrameReference(), AdjustStackOffset(), llvm::MIRPrinter::convertStackObjects(), llvm::TargetLoweringBase::emitPatchPoint(), estimateStackSize(), llvm::HexagonEvaluator::evaluate(), fixupFuncForFI(), llvm::TargetInstrInfo::foldMemoryOperand(), llvm::X86InstrInfo::foldMemoryOperandImpl(), getFrameIndexMMO(), llvm::AMDGPUFrameLowering::getFrameIndexReference(), llvm::X86FrameLowering::getFrameIndexReference(), getMemcpyLoadsAndStores(), getMemmoveLoadsAndStores(), llvm::MipsInstrInfo::GetMemOperand(), getMemsetStores(), llvm::SelectionDAG::InferPtrAlignment(), llvm::Thumb1InstrInfo::loadRegFromStackSlot(), llvm::Thumb2InstrInfo::loadRegFromStackSlot(), llvm::MSP430InstrInfo::loadRegFromStackSlot(), llvm::XCoreInstrInfo::loadRegFromStackSlot(), llvm::AVRInstrInfo::loadRegFromStackSlot(), llvm::SparcInstrInfo::loadRegFromStackSlot(), llvm::AArch64InstrInfo::loadRegFromStackSlot(), llvm::HexagonInstrInfo::loadRegFromStackSlot(), llvm::ARMBaseInstrInfo::loadRegFromStackSlot(), llvm::PPCInstrInfo::loadRegFromStackSlot(), llvm::X86FrameLowering::orderFrameObjects(), llvm::HexagonFrameLowering::processFunctionBeforeFrameFinalized(), llvm::X86FrameLowering::processFunctionBeforeFrameFinalized(), llvm::RegScavenger::scavengeRegister(), scavengeStackSlot(), llvm::Thumb1InstrInfo::storeRegToStackSlot(), llvm::Thumb2InstrInfo::storeRegToStackSlot(), llvm::MSP430InstrInfo::storeRegToStackSlot(), llvm::XCoreInstrInfo::storeRegToStackSlot(), llvm::AVRInstrInfo::storeRegToStackSlot(), llvm::SparcInstrInfo::storeRegToStackSlot(), llvm::AArch64InstrInfo::storeRegToStackSlot(), llvm::HexagonInstrInfo::storeRegToStackSlot(), llvm::ARMBaseInstrInfo::storeRegToStackSlot(), and llvm::PPCInstrInfo::storeRegToStackSlot().

const AllocaInst* llvm::MachineFrameInfo::getObjectAllocation ( int  ObjectIdx) const
inline

Return the underlying Alloca of the specified stack object if it exists.

Returns 0 if none exists.

Definition at line 420 of file MachineFrameInfo.h.

References assert().

Referenced by llvm::MIRPrinter::convertStackObjects().

int llvm::MachineFrameInfo::getObjectIndexBegin ( ) const
inline
int llvm::MachineFrameInfo::getObjectIndexEnd ( ) const
inline
int64_t llvm::MachineFrameInfo::getObjectOffset ( int  ObjectIdx) const
inline

Return the assigned stack offset of the specified object from the incoming stack pointer.

Definition at line 428 of file MachineFrameInfo.h.

References assert(), and isDeadObjectIndex().

Referenced by llvm::SelectionDAG::areNonVolatileConsecutiveLoads(), computeFreeStackSlots(), llvm::MIRPrinter::convertStackObjects(), llvm::BPFRegisterInfo::eliminateFrameIndex(), llvm::MSP430RegisterInfo::eliminateFrameIndex(), llvm::WebAssemblyRegisterInfo::eliminateFrameIndex(), llvm::LanaiRegisterInfo::eliminateFrameIndex(), llvm::AVRRegisterInfo::eliminateFrameIndex(), llvm::NVPTXRegisterInfo::eliminateFrameIndex(), llvm::XCoreRegisterInfo::eliminateFrameIndex(), llvm::ThumbRegisterInfo::eliminateFrameIndex(), llvm::MipsRegisterInfo::eliminateFrameIndex(), llvm::PPCRegisterInfo::eliminateFrameIndex(), llvm::X86RegisterInfo::eliminateFrameIndex(), llvm::AArch64FrameLowering::emitCalleeSavedFrameMoves(), llvm::X86FrameLowering::emitCalleeSavedFrameMoves(), llvm::XCoreFrameLowering::emitEpilogue(), llvm::PPCFrameLowering::emitEpilogue(), llvm::TargetLoweringBase::emitPatchPoint(), llvm::XCoreFrameLowering::emitPrologue(), llvm::Thumb1FrameLowering::emitPrologue(), llvm::ARMFrameLowering::emitPrologue(), llvm::PPCFrameLowering::emitPrologue(), llvm::MipsFrameLowering::estimateStackSize(), estimateStackSize(), llvm::TargetInstrInfo::foldMemoryOperand(), GetEHSpillList(), llvm::MipsSEFrameLowering::getFrameIndexReference(), llvm::SparcFrameLowering::getFrameIndexReference(), llvm::SystemZFrameLowering::getFrameIndexReference(), llvm::HexagonFrameLowering::getFrameIndexReference(), llvm::X86FrameLowering::getFrameIndexReference(), llvm::TargetFrameLowering::getFrameIndexReference(), llvm::X86FrameLowering::getFrameIndexReferencePreferSP(), llvm::SIMachineFunctionInfo::getSpilledReg(), GetSpillList(), isConsecutiveLSLoc(), MatchingStackOffset(), llvm::PPCFrameLowering::processFunctionBeforeFrameFinalized(), llvm::X86FrameLowering::processFunctionBeforeFrameFinalized(), llvm::AArch64FrameLowering::resolveFrameIndexReference(), and llvm::ARMFrameLowering::ResolveFrameIndexReference().

int64_t llvm::MachineFrameInfo::getObjectSize ( int  ObjectIdx) const
inline

Return the size of the specified object.

Definition at line 390 of file MachineFrameInfo.h.

References assert().

Referenced by llvm::addFrameReference(), AdjustStackOffset(), llvm::StatepointLoweringState::allocateStackSlot(), llvm::SelectionDAG::areNonVolatileConsecutiveLoads(), computeFreeStackSlots(), llvm::MIRPrinter::convertStackObjects(), llvm::WebAssemblyRegisterInfo::eliminateFrameIndex(), llvm::TargetLoweringBase::emitPatchPoint(), llvm::MipsFrameLowering::estimateStackSize(), estimateStackSize(), llvm::TargetInstrInfo::foldMemoryOperand(), llvm::SystemZInstrInfo::foldMemoryOperandImpl(), llvm::X86InstrInfo::foldMemoryOperandImpl(), getFrameIndexMMO(), llvm::AMDGPUFrameLowering::getFrameIndexReference(), llvm::MipsInstrInfo::GetMemOperand(), isConsecutiveLSLoc(), llvm::SystemZInstrInfo::isStackSlotCopy(), llvm::Thumb1InstrInfo::loadRegFromStackSlot(), llvm::Thumb2InstrInfo::loadRegFromStackSlot(), llvm::MSP430InstrInfo::loadRegFromStackSlot(), llvm::XCoreInstrInfo::loadRegFromStackSlot(), llvm::AVRInstrInfo::loadRegFromStackSlot(), llvm::SparcInstrInfo::loadRegFromStackSlot(), llvm::AArch64InstrInfo::loadRegFromStackSlot(), llvm::HexagonInstrInfo::loadRegFromStackSlot(), llvm::ARMBaseInstrInfo::loadRegFromStackSlot(), llvm::PPCInstrInfo::loadRegFromStackSlot(), MatchingStackOffset(), llvm::X86FrameLowering::orderFrameObjects(), llvm::HexagonFrameLowering::processFunctionBeforeFrameFinalized(), llvm::X86FrameLowering::processFunctionBeforeFrameFinalized(), llvm::AVRFrameAnalyzer::runOnMachineFunction(), llvm::RegScavenger::scavengeRegister(), scavengeStackSlot(), spillIncomingStatepointValue(), llvm::Thumb1InstrInfo::storeRegToStackSlot(), llvm::Thumb2InstrInfo::storeRegToStackSlot(), llvm::MSP430InstrInfo::storeRegToStackSlot(), llvm::XCoreInstrInfo::storeRegToStackSlot(), llvm::AVRInstrInfo::storeRegToStackSlot(), llvm::SparcInstrInfo::storeRegToStackSlot(), llvm::AArch64InstrInfo::storeRegToStackSlot(), llvm::HexagonInstrInfo::storeRegToStackSlot(), llvm::ARMBaseInstrInfo::storeRegToStackSlot(), llvm::PPCInstrInfo::storeRegToStackSlot(), and llvm::X86InstrInfo::storeRegToStackSlot().

int llvm::MachineFrameInfo::getOffsetAdjustment ( ) const
inline
BitVector MachineFrameInfo::getPristineRegs ( const MachineFunction MF) const

Return a set of physical registers that are pristine.

Pristine registers hold a value that is useless to the current function, but that must be preserved - they are callee saved registers that are not saved.

Before the PrologueEpilogueInserter has placed the CSR spill code, this method always returns an empty set.

Definition at line 853 of file MachineFunction.cpp.

References getCalleeSavedInfo(), llvm::TargetRegisterInfo::getCalleeSavedRegs(), llvm::MCRegisterInfo::getNumRegs(), llvm::TargetSubtargetInfo::getRegisterInfo(), llvm::MachineFunction::getSubtarget(), I, isCalleeSavedInfoValid(), llvm::MCRegisterInfo::DiffListIterator::isValid(), llvm::BitVector::reset(), and llvm::BitVector::set().

Referenced by llvm::Thumb1FrameLowering::emitEpilogue(), llvm::ARMFrameLowering::emitEpilogue(), llvm::CriticalAntiDepBreaker::StartBlock(), and llvm::AggressiveAntiDepBreaker::StartBlock().

MachineBasicBlock* llvm::MachineFrameInfo::getRestorePoint ( ) const
inline
MachineBasicBlock* llvm::MachineFrameInfo::getSavePoint ( ) const
inline
int llvm::MachineFrameInfo::getStackProtectorIndex ( ) const
inline

Return the index for the stack protector object.

Definition at line 295 of file MachineFrameInfo.h.

Referenced by llvm::MIRPrinter::convertStackObjects(), llvm::SelectionDAGBuilder::visitSPDescriptorParent(), and WindowsRequiresStackProbe().

uint64_t llvm::MachineFrameInfo::getStackSize ( ) const
inline

Return the number of bytes that must be allocated to hold all of the fixed size frame objects.

This is only valid after Prolog/Epilog code insertion has finalized the stack frame layout.

Definition at line 473 of file MachineFrameInfo.h.

Referenced by llvm::X86FrameLowering::adjustForHiPEPrologue(), llvm::ARMFrameLowering::adjustForSegmentedStacks(), llvm::X86FrameLowering::adjustForSegmentedStacks(), llvm::MIRPrinter::convert(), llvm::PPCFrameLowering::determineFrameLayout(), llvm::MSP430RegisterInfo::eliminateFrameIndex(), llvm::WebAssemblyRegisterInfo::eliminateFrameIndex(), llvm::LanaiRegisterInfo::eliminateFrameIndex(), llvm::AVRRegisterInfo::eliminateFrameIndex(), llvm::XCoreRegisterInfo::eliminateFrameIndex(), llvm::ThumbRegisterInfo::eliminateFrameIndex(), llvm::MipsRegisterInfo::eliminateFrameIndex(), llvm::PPCRegisterInfo::eliminateFrameIndex(), llvm::AVRFrameLowering::emitEpilogue(), llvm::Mips16FrameLowering::emitEpilogue(), llvm::MipsSEFrameLowering::emitEpilogue(), llvm::SparcFrameLowering::emitEpilogue(), llvm::Thumb1FrameLowering::emitEpilogue(), llvm::MSP430FrameLowering::emitEpilogue(), llvm::XCoreFrameLowering::emitEpilogue(), llvm::ARMFrameLowering::emitEpilogue(), llvm::AArch64FrameLowering::emitEpilogue(), llvm::WebAssemblyFrameLowering::emitEpilogue(), llvm::X86FrameLowering::emitEpilogue(), llvm::PPCFrameLowering::emitEpilogue(), llvm::MipsAsmPrinter::emitFrameDirective(), llvm::AVRFrameLowering::emitPrologue(), llvm::XCoreFrameLowering::emitPrologue(), llvm::Thumb1FrameLowering::emitPrologue(), llvm::ARMFrameLowering::emitPrologue(), llvm::AArch64FrameLowering::emitPrologue(), llvm::WebAssemblyFrameLowering::emitPrologue(), llvm::X86FrameLowering::emitPrologue(), llvm::SystemZFrameLowering::getAllocatedStackSize(), llvm::MipsSEFrameLowering::getFrameIndexReference(), llvm::SparcFrameLowering::getFrameIndexReference(), llvm::HexagonFrameLowering::getFrameIndexReference(), llvm::X86FrameLowering::getFrameIndexReference(), llvm::TargetFrameLowering::getFrameIndexReference(), llvm::X86FrameLowering::getFrameIndexReferencePreferSP(), llvm::WebAssemblyFrameLowering::hasFP(), llvm::HexagonFrameLowering::hasFP(), llvm::PPCFrameLowering::hasFP(), llvm::PPCRegisterInfo::lowerDynamicAlloc(), llvm::AArch64FrameLowering::resolveFrameIndexReference(), and llvm::ARMFrameLowering::ResolveFrameIndexReference().

bool llvm::MachineFrameInfo::getUseLocalStackAllocationBlock ( ) const
inline

Get whether the local allocation blob should be allocated together or let PEI allocate the locals in it directly.

Definition at line 371 of file MachineFrameInfo.h.

bool llvm::MachineFrameInfo::hasCalls ( ) const
inline
bool llvm::MachineFrameInfo::hasCopyImplyingStackAdjustment ( ) const
inline

Returns true if the function contains operations which will lower down to instructions which manipulate the stack pointer.

Definition at line 510 of file MachineFrameInfo.h.

Referenced by llvm::X86FrameLowering::emitPrologue(), and llvm::X86FrameLowering::hasFP().

bool llvm::MachineFrameInfo::hasMustTailInVarArgFunc ( ) const
inline

Returns true if the function is variadic and contains a musttail call.

Definition at line 522 of file MachineFrameInfo.h.

Referenced by llvm::MIRPrinter::convert().

bool llvm::MachineFrameInfo::hasOpaqueSPAdjustment ( ) const
inline

Returns true if the function contains opaque dynamic stack adjustments.

Definition at line 505 of file MachineFrameInfo.h.

Referenced by llvm::RegsForValue::AddInlineAsmOperands(), CantUseSP(), llvm::MIRPrinter::convert(), and llvm::X86FrameLowering::hasFP().

bool llvm::MachineFrameInfo::hasPatchPoint ( ) const
inline

This method may be called any time after instruction selection is complete to determine if there is a call to builtin @llvm.experimental.patchpoint.

Definition at line 325 of file MachineFrameInfo.h.

Referenced by llvm::MIRPrinter::convert(), llvm::WebAssemblyFrameLowering::hasFP(), llvm::AArch64FrameLowering::hasFP(), llvm::X86FrameLowering::hasFP(), and llvm::PPCFrameLowering::needsFP().

bool llvm::MachineFrameInfo::hasStackMap ( ) const
inline

This method may be called any time after instruction selection is complete to determine if there is a call to builtin @llvm.experimental.stackmap.

Definition at line 319 of file MachineFrameInfo.h.

Referenced by llvm::MIRPrinter::convert(), llvm::WebAssemblyFrameLowering::hasFP(), llvm::AArch64FrameLowering::hasFP(), llvm::X86FrameLowering::hasFP(), and llvm::PPCFrameLowering::needsFP().

bool llvm::MachineFrameInfo::hasStackObjects ( ) const
inline
bool llvm::MachineFrameInfo::hasStackProtectorIndex ( ) const
inline

Definition at line 297 of file MachineFrameInfo.h.

Referenced by llvm::MIRPrinter::convertStackObjects().

bool llvm::MachineFrameInfo::hasTailCall ( ) const
inline

Returns true if the function contains a tail call.

Definition at line 526 of file MachineFrameInfo.h.

Referenced by getUnderlyingObjectsForInstr(), and llvm::PPCFrameLowering::processFunctionBeforeFrameFinalized().

bool llvm::MachineFrameInfo::hasVarSizedObjects ( ) const
inline

This method may be called any time after instruction selection is complete to determine if the stack frame for this function contains any variable sized objects.

Definition at line 292 of file MachineFrameInfo.h.

Referenced by llvm::PPCFrameLowering::addScavengingSpillSlot(), llvm::AArch64RegisterInfo::cannotEliminateFrame(), llvm::ARMBaseRegisterInfo::cannotEliminateFrame(), llvm::ARMFrameLowering::canSimplifyCallFramePseudos(), CantUseSP(), llvm::PPCFrameLowering::determineFrameLayout(), llvm::ThumbRegisterInfo::eliminateFrameIndex(), llvm::ARMBaseRegisterInfo::eliminateFrameIndex(), llvm::MSP430FrameLowering::emitEpilogue(), llvm::AArch64FrameLowering::emitEpilogue(), llvm::X86FrameLowering::emitEpilogue(), llvm::PPCFrameLowering::emitEpilogue(), llvm::Thumb1FrameLowering::emitPrologue(), llvm::ARMFrameLowering::emitPrologue(), llvm::X86FrameLowering::emitPrologue(), estimateStackSize(), llvm::SystemZFrameLowering::getAllocatedStackSize(), llvm::HexagonFrameLowering::getFrameIndexReference(), llvm::R600InstrInfo::getIndirectIndexEnd(), llvm::MipsRegisterInfo::getReservedRegs(), llvm::LanaiRegisterInfo::hasBasePointer(), llvm::AArch64RegisterInfo::hasBasePointer(), llvm::ARMBaseRegisterInfo::hasBasePointer(), llvm::MipsFrameLowering::hasBP(), llvm::MipsFrameLowering::hasFP(), llvm::SparcFrameLowering::hasFP(), llvm::WebAssemblyFrameLowering::hasFP(), llvm::SystemZFrameLowering::hasFP(), llvm::ARMFrameLowering::hasFP(), llvm::MSP430FrameLowering::hasFP(), llvm::XCoreFrameLowering::hasFP(), llvm::AArch64FrameLowering::hasFP(), llvm::HexagonFrameLowering::hasFP(), llvm::X86FrameLowering::hasFP(), llvm::AVRFrameLowering::hasReservedCallFrame(), llvm::SparcFrameLowering::hasReservedCallFrame(), llvm::MipsSEFrameLowering::hasReservedCallFrame(), llvm::Mips16FrameLowering::hasReservedCallFrame(), llvm::Thumb1FrameLowering::hasReservedCallFrame(), llvm::WebAssemblyFrameLowering::hasReservedCallFrame(), llvm::ARMFrameLowering::hasReservedCallFrame(), llvm::MSP430FrameLowering::hasReservedCallFrame(), llvm::AArch64FrameLowering::hasReservedCallFrame(), llvm::X86FrameLowering::hasReservedCallFrame(), llvm::HexagonFrameLowering::needsAligna(), llvm::PPCFrameLowering::needsFP(), llvm::ARMBaseRegisterInfo::needsFrameBaseReg(), llvm::HexagonFrameLowering::processFunctionBeforeFrameFinalized(), llvm::AArch64FrameLowering::resolveFrameIndexReference(), llvm::AVRDynAllocaSR::runOnMachineFunction(), and llvm::AArch64RegisterInfo::useFPForScavengingIndex().

bool llvm::MachineFrameInfo::hasVAStart ( ) const
inline

Returns true if the function calls the llvm.va_start intrinsic.

Definition at line 518 of file MachineFrameInfo.h.

Referenced by llvm::MIRPrinter::convert().

bool llvm::MachineFrameInfo::isAliasedObjectIndex ( int  ObjectIdx) const
inline

Returns true if the specified index corresponds to an object that might be pointed to by an LLVM IR value.

Definition at line 556 of file MachineFrameInfo.h.

References assert().

Referenced by llvm::MIRPrinter::convertStackObjects(), and llvm::FixedStackPseudoSourceValue::isAliased().

bool llvm::MachineFrameInfo::isCalleeSavedInfoValid ( ) const
inline

Has the callee saved info been calculated yet?

Definition at line 640 of file MachineFrameInfo.h.

Referenced by llvm::LivePhysRegs::addLiveIns(), llvm::LivePhysRegs::addLiveOuts(), and getPristineRegs().

bool llvm::MachineFrameInfo::isDeadObjectIndex ( int  ObjectIdx) const
inline

Returns true if the specified index corresponds to a dead object.

Definition at line 587 of file MachineFrameInfo.h.

References assert().

Referenced by llvm::MIRPrinter::convertStackObjects(), estimateStackSize(), getObjectOffset(), llvm::HexagonFrameLowering::processFunctionBeforeFrameFinalized(), and setObjectOffset().

bool llvm::MachineFrameInfo::isFixedObjectIndex ( int  ObjectIdx) const
inline
bool llvm::MachineFrameInfo::isFrameAddressTaken ( ) const
inline
bool llvm::MachineFrameInfo::isImmutableObjectIndex ( int  ObjectIdx) const
inline

isImmutableObjectIndex - Returns true if the specified index corresponds to an immutable object.

Definition at line 564 of file MachineFrameInfo.h.

References assert().

Referenced by llvm::MIRPrinter::convertStackObjects(), and llvm::FixedStackPseudoSourceValue::isConstant().

bool llvm::MachineFrameInfo::isObjectPreAllocated ( int  ObjectIdx) const
inline

Return true if the object was pre-allocated into the local block.

Definition at line 383 of file MachineFrameInfo.h.

References assert().

Referenced by llvm::HexagonFrameLowering::getFrameIndexReference().

bool llvm::MachineFrameInfo::isObjectSExt ( int  ObjectIdx) const
inline

Definition at line 448 of file MachineFrameInfo.h.

References assert().

Referenced by MatchingStackOffset().

bool llvm::MachineFrameInfo::isObjectZExt ( int  ObjectIdx) const
inline

Definition at line 436 of file MachineFrameInfo.h.

References assert().

Referenced by MatchingStackOffset().

bool llvm::MachineFrameInfo::isReturnAddressTaken ( ) const
inline

This method may be called any time after instruction selection is complete to determine if there is a call to @llvm.returnaddress in this function.

Definition at line 313 of file MachineFrameInfo.h.

Referenced by llvm::MIRPrinter::convert(), llvm::ARMFrameLowering::determineCalleeSaves(), llvm::Mips16FrameLowering::spillCalleeSavedRegisters(), and llvm::MipsSEFrameLowering::spillCalleeSavedRegisters().

bool llvm::MachineFrameInfo::isSpillSlotObjectIndex ( int  ObjectIdx) const
inline

Returns true if the specified index corresponds to a spill slot.

Definition at line 574 of file MachineFrameInfo.h.

References assert().

Referenced by llvm::MIRPrinter::convertStackObjects(), emitComments(), llvm::FixedStackPseudoSourceValue::mayAlias(), and llvm::HexagonFrameLowering::processFunctionBeforeFrameFinalized().

bool llvm::MachineFrameInfo::isStatepointSpillSlotObjectIndex ( int  ObjectIdx) const
inline
bool llvm::MachineFrameInfo::isVariableSizedObjectIndex ( int  ObjectIdx) const
inline

Returns true if the specified index corresponds to a variable sized object.

Definition at line 595 of file MachineFrameInfo.h.

References assert().

Referenced by llvm::MIRPrinter::convertStackObjects(), and scavengeStackSlot().

void llvm::MachineFrameInfo::mapLocalFrameObject ( int  ObjectIndex,
int64_t  Offset 
)
inline
void llvm::MachineFrameInfo::markAsStatepointSpillSlotObjectIndex ( int  ObjectIdx)
inline
void MachineFrameInfo::print ( const MachineFunction MF,
raw_ostream OS 
) const

Used by the MachineFunction printer to print information about stack objects.

Implemented in MachineFunction.cpp.

Definition at line 922 of file MachineFunction.cpp.

References llvm::TargetSubtargetInfo::getFrameLowering(), llvm::TargetFrameLowering::getOffsetOfLocalArea(), llvm::MachineFunction::getSubtarget(), and i.

Referenced by dump(), and llvm::MachineFunction::print().

void llvm::MachineFrameInfo::RemoveStackObject ( int  ObjectIdx)
inline

Remove or mark dead a statically sized stack object.

Definition at line 618 of file MachineFrameInfo.h.

void llvm::MachineFrameInfo::setAdjustsStack ( bool  V)
inline
void llvm::MachineFrameInfo::setCalleeSavedInfo ( const std::vector< CalleeSavedInfo > &  CSI)
inline

Used by prolog/epilog inserter to set the function's callee saved information.

Definition at line 635 of file MachineFrameInfo.h.

Referenced by assignCalleeSavedSpillSlots(), and llvm::MIRParserImpl::initializeFrameInfo().

void llvm::MachineFrameInfo::setCalleeSavedInfoValid ( bool  v)
inline
void llvm::MachineFrameInfo::setFrameAddressIsTaken ( bool  T)
inline
void llvm::MachineFrameInfo::setFunctionContextIndex ( int  I)
inline

Definition at line 302 of file MachineFrameInfo.h.

References I.

void llvm::MachineFrameInfo::setHasCalls ( bool  V)
inline
void llvm::MachineFrameInfo::setHasCopyImplyingStackAdjustment ( bool  B)
inline

Definition at line 513 of file MachineFrameInfo.h.

References B.

Referenced by LowerINTRINSIC_W_CHAIN(), and llvm::SelectionDAGISel::runOnMachineFunction().

void llvm::MachineFrameInfo::setHasMustTailInVarArgFunc ( bool  B)
inline

Definition at line 523 of file MachineFrameInfo.h.

References B.

Referenced by llvm::MIRParserImpl::initializeFrameInfo(), and llvm::FunctionLoweringInfo::set().

void llvm::MachineFrameInfo::setHasOpaqueSPAdjustment ( bool  B)
inline

Definition at line 506 of file MachineFrameInfo.h.

References B.

Referenced by llvm::MIRParserImpl::initializeFrameInfo(), and llvm::FunctionLoweringInfo::set().

void llvm::MachineFrameInfo::setHasPatchPoint ( bool  s = true)
inline
void llvm::MachineFrameInfo::setHasStackMap ( bool  s = true)
inline
void llvm::MachineFrameInfo::setHasTailCall ( )
inline

Definition at line 527 of file MachineFrameInfo.h.

Referenced by llvm::HexagonTargetLowering::LowerCall().

void llvm::MachineFrameInfo::setHasVAStart ( bool  B)
inline

Definition at line 519 of file MachineFrameInfo.h.

References B.

Referenced by llvm::MIRParserImpl::initializeFrameInfo(), and llvm::FunctionLoweringInfo::set().

void llvm::MachineFrameInfo::setLocalFrameMaxAlign ( unsigned  Align)
inline

Required alignment of the local object blob, which is the strictest alignment of any object in it.

Definition at line 364 of file MachineFrameInfo.h.

Referenced by llvm::HexagonFrameLowering::processFunctionBeforeFrameFinalized().

void llvm::MachineFrameInfo::setLocalFrameSize ( int64_t  sz)
inline

Set the size of the local object blob.

Definition at line 357 of file MachineFrameInfo.h.

Referenced by llvm::HexagonFrameLowering::processFunctionBeforeFrameFinalized().

void llvm::MachineFrameInfo::setMaxCallFrameSize ( unsigned  S)
inline
void llvm::MachineFrameInfo::setObjectAlignment ( int  ObjectIdx,
unsigned  Align 
)
inline
void llvm::MachineFrameInfo::setObjectOffset ( int  ObjectIdx,
int64_t  SPOffset 
)
inline

Set the stack frame offset of the specified object.

The offset is relative to the stack pointer on entry to the function.

Definition at line 462 of file MachineFrameInfo.h.

References assert(), and isDeadObjectIndex().

Referenced by AdjustStackOffset(), llvm::MIRParserImpl::initializeFrameInfo(), llvm::PPCFrameLowering::processFunctionBeforeFrameFinalized(), llvm::X86FrameLowering::processFunctionBeforeFrameFinalized(), and scavengeStackSlot().

void llvm::MachineFrameInfo::setObjectSExt ( int  ObjectIdx,
bool  IsSExt 
)
inline

Definition at line 454 of file MachineFrameInfo.h.

References assert().

void llvm::MachineFrameInfo::setObjectSize ( int  ObjectIdx,
int64_t  Size 
)
inline

Change the size of the specified stack object.

Definition at line 397 of file MachineFrameInfo.h.

References assert().

void llvm::MachineFrameInfo::setObjectZExt ( int  ObjectIdx,
bool  IsZExt 
)
inline

Definition at line 442 of file MachineFrameInfo.h.

References assert().

void llvm::MachineFrameInfo::setOffsetAdjustment ( int  Adj)
inline
void llvm::MachineFrameInfo::setRestorePoint ( MachineBasicBlock NewRestore)
inline

Definition at line 647 of file MachineFrameInfo.h.

Referenced by llvm::MIRParserImpl::initializeFrameInfo().

void llvm::MachineFrameInfo::setReturnAddressIsTaken ( bool  s)
inline
void llvm::MachineFrameInfo::setSavePoint ( MachineBasicBlock NewSave)
inline

Definition at line 645 of file MachineFrameInfo.h.

Referenced by llvm::MIRParserImpl::initializeFrameInfo().

void llvm::MachineFrameInfo::setStackProtectorIndex ( int  I)
inline

Definition at line 296 of file MachineFrameInfo.h.

References I.

Referenced by llvm::MIRParserImpl::initializeFrameInfo().

void llvm::MachineFrameInfo::setStackSize ( uint64_t  Size)
inline
void llvm::MachineFrameInfo::setUseLocalStackAllocationBlock ( bool  v)
inline

setUseLocalStackAllocationBlock - Set whether the local allocation blob should be allocated together or let PEI allocate the locals in it directly.

Definition at line 378 of file MachineFrameInfo.h.

Referenced by llvm::HexagonFrameLowering::processFunctionBeforeFrameFinalized().


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