LLVM 19.0.0git
Public Member Functions | List of all members
llvm::PPCFrameLowering Class Reference

#include "Target/PowerPC/PPCFrameLowering.h"

Inheritance diagram for llvm::PPCFrameLowering:
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Public Member Functions

 PPCFrameLowering (const PPCSubtarget &STI)
 
uint64_t determineFrameLayoutAndUpdate (MachineFunction &MF, bool UseEstimate=false) const
 Determine the frame layout and update the machine function.
 
uint64_t determineFrameLayout (const MachineFunction &MF, bool UseEstimate=false, unsigned *NewMaxCallFrameSize=nullptr) const
 Determine the frame layout but do not update the machine function.
 
void emitPrologue (MachineFunction &MF, MachineBasicBlock &MBB) const override
 emitProlog/emitEpilog - These methods insert prolog and epilog code into the function.
 
void emitEpilogue (MachineFunction &MF, MachineBasicBlock &MBB) const override
 
void inlineStackProbe (MachineFunction &MF, MachineBasicBlock &PrologMBB) const override
 Replace a StackProbe stub (if any) with the actual probe code inline.
 
bool hasFP (const MachineFunction &MF) const override
 hasFP - Return true if the specified function should have a dedicated frame pointer register.
 
bool needsFP (const MachineFunction &MF) const
 
void replaceFPWithRealFP (MachineFunction &MF) const
 
void determineCalleeSaves (MachineFunction &MF, BitVector &SavedRegs, RegScavenger *RS=nullptr) const override
 This method determines which of the registers reported by TargetRegisterInfo::getCalleeSavedRegs() should actually get saved.
 
void processFunctionBeforeFrameFinalized (MachineFunction &MF, RegScavenger *RS=nullptr) const override
 processFunctionBeforeFrameFinalized - This method is called immediately before the specified function's frame layout (MF.getFrameInfo()) is finalized.
 
void addScavengingSpillSlot (MachineFunction &MF, RegScavenger *RS) const
 
bool spillCalleeSavedRegisters (MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, ArrayRef< CalleeSavedInfo > CSI, const TargetRegisterInfo *TRI) const override
 spillCalleeSavedRegisters - Issues instruction(s) to spill all callee saved registers and returns true if it isn't possible / profitable to do so by issuing a series of store instructions via storeRegToStackSlot().
 
bool assignCalleeSavedSpillSlots (MachineFunction &MF, const TargetRegisterInfo *TRI, std::vector< CalleeSavedInfo > &CSI) const override
 This function will assign callee saved gprs to volatile vector registers for prologue spills when applicable.
 
MachineBasicBlock::iterator eliminateCallFramePseudoInstr (MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator I) const override
 This method is called during prolog/epilog code insertion to eliminate call frame setup and destroy pseudo instructions (but only if the Target is using them).
 
bool restoreCalleeSavedRegisters (MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, MutableArrayRef< CalleeSavedInfo > CSI, const TargetRegisterInfo *TRI) const override
 restoreCalleeSavedRegisters - Issues instruction(s) to restore all callee saved registers and returns true if it isn't possible / profitable to do so by issuing a series of load instructions via loadRegToStackSlot().
 
bool targetHandlesStackFrameRounding () const override
 targetHandlesStackFrameRounding - Returns true if the target is responsible for rounding up the stack frame (probably at emitPrologue time).
 
uint64_t getReturnSaveOffset () const
 getReturnSaveOffset - Return the previous frame offset to save the return address.
 
uint64_t getTOCSaveOffset () const
 getTOCSaveOffset - Return the previous frame offset to save the TOC register – 64-bit SVR4 ABI only.
 
uint64_t getFramePointerSaveOffset () const
 getFramePointerSaveOffset - Return the previous frame offset to save the frame pointer.
 
uint64_t getBasePointerSaveOffset () const
 getBasePointerSaveOffset - Return the previous frame offset to save the base pointer.
 
unsigned getLinkageSize () const
 getLinkageSize - Return the size of the PowerPC ABI linkage area.
 
const SpillSlotgetCalleeSavedSpillSlots (unsigned &NumEntries) const override
 getCalleeSavedSpillSlots - This method returns a pointer to an array of pairs, that contains an entry for each callee saved register that must be spilled to a particular stack location if it is spilled.
 
bool enableShrinkWrapping (const MachineFunction &MF) const override
 Returns true if the target will correctly handle shrink wrapping.
 
bool canUseAsPrologue (const MachineBasicBlock &MBB) const override
 Methods used by shrink wrapping to determine if MBB can be used for the function prologue/epilogue.
 
bool canUseAsEpilogue (const MachineBasicBlock &MBB) const override
 Check whether or not the given MBB can be used as a epilogue for the target.
 
uint64_t getStackThreshold () const override
 getStackThreshold - Return the maximum stack size
 
- Public Member Functions inherited from llvm::TargetFrameLowering
 TargetFrameLowering (StackDirection D, Align StackAl, int LAO, Align TransAl=Align(1), bool StackReal=true)
 
virtual ~TargetFrameLowering ()
 
StackDirection getStackGrowthDirection () const
 getStackGrowthDirection - Return the direction the stack grows
 
unsigned getStackAlignment () const
 getStackAlignment - This method returns the number of bytes to which the stack pointer must be aligned on entry to a function.
 
Align getStackAlign () const
 getStackAlignment - This method returns the number of bytes to which the stack pointer must be aligned on entry to a function.
 
virtual uint64_t getStackThreshold () const
 getStackThreshold - Return the maximum stack size
 
int alignSPAdjust (int SPAdj) const
 alignSPAdjust - This method aligns the stack adjustment to the correct alignment.
 
Align getTransientStackAlign () const
 getTransientStackAlignment - This method returns the number of bytes to which the stack pointer must be aligned at all times, even between calls.
 
bool isStackRealignable () const
 isStackRealignable - This method returns whether the stack can be realigned.
 
virtual bool isStackIdSafeForLocalArea (unsigned StackId) const
 This method returns whether or not it is safe for an object with the given stack id to be bundled into the local area.
 
int getOffsetOfLocalArea () const
 getOffsetOfLocalArea - This method returns the offset of the local area from the stack pointer on entrance to a function.
 
virtual bool allocateScavengingFrameIndexesNearIncomingSP (const MachineFunction &MF) const
 Control the placement of special register scavenging spill slots when allocating a stack frame.
 
virtual bool assignCalleeSavedSpillSlots (MachineFunction &MF, const TargetRegisterInfo *TRI, std::vector< CalleeSavedInfo > &CSI, unsigned &MinCSFrameIndex, unsigned &MaxCSFrameIndex) const
 assignCalleeSavedSpillSlots - Allows target to override spill slot assignment logic.
 
virtual bool assignCalleeSavedSpillSlots (MachineFunction &MF, const TargetRegisterInfo *TRI, std::vector< CalleeSavedInfo > &CSI) const
 
virtual const SpillSlotgetCalleeSavedSpillSlots (unsigned &NumEntries) const
 getCalleeSavedSpillSlots - This method returns a pointer to an array of pairs, that contains an entry for each callee saved register that must be spilled to a particular stack location if it is spilled.
 
virtual bool targetHandlesStackFrameRounding () const
 targetHandlesStackFrameRounding - Returns true if the target is responsible for rounding up the stack frame (probably at emitPrologue time).
 
virtual bool enableShrinkWrapping (const MachineFunction &MF) const
 Returns true if the target will correctly handle shrink wrapping.
 
virtual bool enableStackSlotScavenging (const MachineFunction &MF) const
 Returns true if the stack slot holes in the fixed and callee-save stack area should be used when allocating other stack locations to reduce stack size.
 
virtual bool enableCalleeSaveSkip (const MachineFunction &MF) const
 Returns true if the target can safely skip saving callee-saved registers for noreturn nounwind functions.
 
virtual void emitPrologue (MachineFunction &MF, MachineBasicBlock &MBB) const =0
 emitProlog/emitEpilog - These methods insert prolog and epilog code into the function.
 
virtual void emitEpilogue (MachineFunction &MF, MachineBasicBlock &MBB) const =0
 
virtual void emitZeroCallUsedRegs (BitVector RegsToZero, MachineBasicBlock &MBB) const
 emitZeroCallUsedRegs - Zeros out call used registers.
 
virtual void emitCalleeSavedFrameMovesFullCFA (MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI) const
 With basic block sections, emit callee saved frame moves for basic blocks that are in a different section.
 
virtual bool enableCFIFixup (MachineFunction &MF) const
 Returns true if we may need to fix the unwind information for the function.
 
virtual void resetCFIToInitialState (MachineBasicBlock &MBB) const
 Emit CFI instructions that recreate the state of the unwind information upon fucntion entry.
 
virtual void inlineStackProbe (MachineFunction &MF, MachineBasicBlock &PrologueMBB) const
 Replace a StackProbe stub (if any) with the actual probe code inline.
 
virtual bool stackProbeFunctionModifiesSP () const
 Does the stack probe function call return with a modified stack pointer?
 
virtual void adjustForSegmentedStacks (MachineFunction &MF, MachineBasicBlock &PrologueMBB) const
 Adjust the prologue to have the function use segmented stacks.
 
virtual void adjustForHiPEPrologue (MachineFunction &MF, MachineBasicBlock &PrologueMBB) const
 Adjust the prologue to add Erlang Run-Time System (ERTS) specific code in the assembly prologue to explicitly handle the stack.
 
virtual bool spillCalleeSavedRegisters (MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, ArrayRef< CalleeSavedInfo > CSI, const TargetRegisterInfo *TRI) const
 spillCalleeSavedRegisters - Issues instruction(s) to spill all callee saved registers and returns true if it isn't possible / profitable to do so by issuing a series of store instructions via storeRegToStackSlot().
 
virtual bool restoreCalleeSavedRegisters (MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, MutableArrayRef< CalleeSavedInfo > CSI, const TargetRegisterInfo *TRI) const
 restoreCalleeSavedRegisters - Issues instruction(s) to restore all callee saved registers and returns true if it isn't possible / profitable to do so by issuing a series of load instructions via loadRegToStackSlot().
 
virtual bool keepFramePointer (const MachineFunction &MF) const
 Return true if the target wants to keep the frame pointer regardless of the function attribute "frame-pointer".
 
virtual bool hasFP (const MachineFunction &MF) const =0
 hasFP - Return true if the specified function should have a dedicated frame pointer register.
 
virtual bool hasReservedCallFrame (const MachineFunction &MF) const
 hasReservedCallFrame - Under normal circumstances, when a frame pointer is not required, we reserve argument space for call sites in the function immediately on entry to the current function.
 
virtual bool canSimplifyCallFramePseudos (const MachineFunction &MF) const
 canSimplifyCallFramePseudos - When possible, it's best to simplify the call frame pseudo ops before doing frame index elimination.
 
virtual bool needsFrameIndexResolution (const MachineFunction &MF) const
 
virtual StackOffset getFrameIndexReference (const MachineFunction &MF, int FI, Register &FrameReg) const
 getFrameIndexReference - This method should return the base register and offset used to reference a frame index location.
 
virtual StackOffset getFrameIndexReferencePreferSP (const MachineFunction &MF, int FI, Register &FrameReg, bool IgnoreSPUpdates) const
 Same as getFrameIndexReference, except that the stack pointer (as opposed to the frame pointer) will be the preferred value for FrameReg.
 
virtual StackOffset getNonLocalFrameIndexReference (const MachineFunction &MF, int FI) const
 getNonLocalFrameIndexReference - This method returns the offset used to reference a frame index location.
 
virtual void getCalleeSaves (const MachineFunction &MF, BitVector &SavedRegs) const
 Returns the callee-saved registers as computed by determineCalleeSaves in the BitVector SavedRegs.
 
virtual void determineCalleeSaves (MachineFunction &MF, BitVector &SavedRegs, RegScavenger *RS=nullptr) const
 This method determines which of the registers reported by TargetRegisterInfo::getCalleeSavedRegs() should actually get saved.
 
virtual void processFunctionBeforeFrameFinalized (MachineFunction &MF, RegScavenger *RS=nullptr) const
 processFunctionBeforeFrameFinalized - This method is called immediately before the specified function's frame layout (MF.getFrameInfo()) is finalized.
 
virtual void processFunctionBeforeFrameIndicesReplaced (MachineFunction &MF, RegScavenger *RS=nullptr) const
 processFunctionBeforeFrameIndicesReplaced - This method is called immediately before MO_FrameIndex operands are eliminated, but after the frame is finalized.
 
virtual unsigned getWinEHParentFrameOffset (const MachineFunction &MF) const
 
virtual MachineBasicBlock::iterator eliminateCallFramePseudoInstr (MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator MI) const
 This method is called during prolog/epilog code insertion to eliminate call frame setup and destroy pseudo instructions (but only if the Target is using them).
 
virtual void orderFrameObjects (const MachineFunction &MF, SmallVectorImpl< int > &objectsToAllocate) const
 Order the symbols in the local stack frame.
 
virtual bool canUseAsPrologue (const MachineBasicBlock &MBB) const
 Check whether or not the given MBB can be used as a prologue for the target.
 
virtual bool canUseAsEpilogue (const MachineBasicBlock &MBB) const
 Check whether or not the given MBB can be used as a epilogue for the target.
 
virtual TargetStackID::Value getStackIDForScalableVectors () const
 Returns the StackID that scalable vectors should be associated with.
 
virtual bool isSupportedStackID (TargetStackID::Value ID) const
 
virtual bool isProfitableForNoCSROpt (const Function &F) const
 Check if the no-CSR optimisation is profitable for the given function.
 
virtual int getInitialCFAOffset (const MachineFunction &MF) const
 Return initial CFA offset value i.e.
 
virtual Register getInitialCFARegister (const MachineFunction &MF) const
 Return initial CFA register value i.e.
 
virtual DwarfFrameBase getDwarfFrameBase (const MachineFunction &MF) const
 Return the frame base information to be encoded in the DWARF subprogram debug info.
 

Additional Inherited Members

- Public Types inherited from llvm::TargetFrameLowering
enum  StackDirection { StackGrowsUp , StackGrowsDown }
 
- Static Public Member Functions inherited from llvm::TargetFrameLowering
static bool isSafeForNoCSROpt (const Function &F)
 Check if given function is safe for not having callee saved registers.
 

Detailed Description

Definition at line 22 of file PPCFrameLowering.h.

Constructor & Destructor Documentation

◆ PPCFrameLowering()

PPCFrameLowering::PPCFrameLowering ( const PPCSubtarget STI)

Definition at line 82 of file PPCFrameLowering.cpp.

Member Function Documentation

◆ addScavengingSpillSlot()

void PPCFrameLowering::addScavengingSpillSlot ( MachineFunction MF,
RegScavenger RS 
) const

◆ assignCalleeSavedSpillSlots()

bool PPCFrameLowering::assignCalleeSavedSpillSlots ( MachineFunction MF,
const TargetRegisterInfo TRI,
std::vector< CalleeSavedInfo > &  CSI 
) const
overridevirtual

This function will assign callee saved gprs to volatile vector registers for prologue spills when applicable.

It returns false if there are any registers which were not spilled to volatile vector registers.

Reimplemented from llvm::TargetFrameLowering.

Definition at line 2321 of file PPCFrameLowering.cpp.

References contains(), EnablePEVectorSpills, llvm::BitVector::find_first(), llvm::PPCRegisterInfo::getCalleeSavedRegs(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getRegInfo(), llvm::PPCSubtarget::getRegisterInfo(), llvm::MachineFrameInfo::hasCalls(), llvm::Lower, MRI, llvm::BitVector::none(), llvm::BitVector::reset(), llvm::BitVector::set(), llvm::BitVector::set_bits(), llvm::BitVector::size(), and TRI.

◆ canUseAsEpilogue()

bool PPCFrameLowering::canUseAsEpilogue ( const MachineBasicBlock MBB) const
overridevirtual

Check whether or not the given MBB can be used as a epilogue for the target.

The epilogue will be inserted before the first terminator of that block. This method is used by the shrink-wrapping pass to decide if MBB will be correctly handled by the target. As soon as the target enable shrink-wrapping without overriding this method, we assume that each basic block is a valid epilogue.

Reimplemented from llvm::TargetFrameLowering.

Definition at line 554 of file PPCFrameLowering.cpp.

References MBB.

◆ canUseAsPrologue()

bool PPCFrameLowering::canUseAsPrologue ( const MachineBasicBlock MBB) const
overridevirtual

Methods used by shrink wrapping to determine if MBB can be used for the function prologue/epilogue.

Reimplemented from llvm::TargetFrameLowering.

Definition at line 547 of file PPCFrameLowering.cpp.

References MBB.

◆ determineCalleeSaves()

void PPCFrameLowering::determineCalleeSaves ( MachineFunction MF,
BitVector SavedRegs,
RegScavenger RS = nullptr 
) const
overridevirtual

This method determines which of the registers reported by TargetRegisterInfo::getCalleeSavedRegs() should actually get saved.

The default implementation checks populates the SavedRegs bitset with all registers which are modified in the function, targets may override this function to save additional registers. This method also sets up the register scavenger ensuring there is a free register or a frameindex available. This method should not be called by any passes outside of PEI, because it may change state passed in by MF and RS. The preferred interface outside PEI is getCalleeSaves.

Reimplemented from llvm::TargetFrameLowering.

Definition at line 1972 of file PPCFrameLowering.cpp.

References llvm::MachineFrameInfo::CreateFixedObject(), llvm::TargetFrameLowering::determineCalleeSaves(), llvm::PPCFunctionInfo::getBasePointerSaveIndex(), getBasePointerSaveOffset(), llvm::PPCRegisterInfo::getBaseRegister(), llvm::MachineFunction::getFrameInfo(), llvm::PPCFunctionInfo::getFramePointerSaveIndex(), getFramePointerSaveOffset(), llvm::MachineFunction::getInfo(), llvm::PPCSubtarget::getRegisterInfo(), llvm::PPCFunctionInfo::getTailCallSPDelta(), llvm::MachineFunction::getTarget(), llvm::TargetOptions::GuaranteedTailCallOpt, llvm::PPCRegisterInfo::hasBasePointer(), llvm::PPCSubtarget::isAIXABI(), llvm::PPCSubtarget::isPPC64(), MustSaveLR(), needsFP(), llvm::TargetMachine::Options, llvm::BitVector::reset(), llvm::PPCFunctionInfo::setBasePointerSaveIndex(), llvm::PPCFunctionInfo::setCRSpillFrameIndex(), llvm::PPCFunctionInfo::setFramePointerSaveIndex(), llvm::PPCFunctionInfo::setMustSaveLR(), llvm::PPCFunctionInfo::setPICBasePointerSaveIndex(), llvm::BitVector::test(), and llvm::PPCFunctionInfo::usesPICBase().

◆ determineFrameLayout()

uint64_t PPCFrameLowering::determineFrameLayout ( const MachineFunction MF,
bool  UseEstimate = false,
unsigned NewMaxCallFrameSize = nullptr 
) const

◆ determineFrameLayoutAndUpdate()

uint64_t PPCFrameLowering::determineFrameLayoutAndUpdate ( MachineFunction MF,
bool  UseEstimate = false 
) const

Determine the frame layout and update the machine function.

determineFrameLayoutAndUpdate - Determine the size of the frame and maximum call frame size.

Update the MachineFunction object with the stack size.

Definition at line 284 of file PPCFrameLowering.cpp.

References determineFrameLayout(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFrameInfo::setMaxCallFrameSize(), and llvm::MachineFrameInfo::setStackSize().

Referenced by emitPrologue().

◆ eliminateCallFramePseudoInstr()

MachineBasicBlock::iterator PPCFrameLowering::eliminateCallFramePseudoInstr ( MachineFunction MF,
MachineBasicBlock MBB,
MachineBasicBlock::iterator  MI 
) const
overridevirtual

This method is called during prolog/epilog code insertion to eliminate call frame setup and destroy pseudo instructions (but only if the Target is using them).

It is responsible for eliminating these instructions, replacing them with concrete instructions. This method need only be implemented if using call frame setup/destroy pseudo instructions. Returns an iterator pointing to the instruction after the replaced one.

Reimplemented from llvm::TargetFrameLowering.

Definition at line 2553 of file PPCFrameLowering.cpp.

References llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), llvm::MachineBasicBlock::erase(), llvm::PPCSubtarget::getInstrInfo(), llvm::MachineFunction::getTarget(), llvm::TargetOptions::GuaranteedTailCallOpt, I, is64Bit(), llvm::PPCSubtarget::isPPC64(), llvm::RegState::Kill, MBB, MBBI, llvm::TargetMachine::Options, and TII.

◆ emitEpilogue()

void PPCFrameLowering::emitEpilogue ( MachineFunction MF,
MachineBasicBlock MBB 
) const
overridevirtual

Implements llvm::TargetFrameLowering.

Definition at line 1544 of file PPCFrameLowering.cpp.

References llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), assert(), llvm::BuildMI(), llvm::SmallVectorBase< Size_T >::empty(), llvm::MachineBasicBlock::end(), llvm::MachineFunction::exposesReturnsTwice(), llvm::CallingConv::Fast, llvm::PPCFunctionInfo::getBasePointerSaveIndex(), llvm::PPCRegisterInfo::getBaseRegister(), llvm::MachineFrameInfo::getCalleeSavedInfo(), llvm::Function::getCallingConv(), llvm::MachineBasicBlock::getFirstTerminator(), llvm::MachineFunction::getFrameInfo(), llvm::PPCFunctionInfo::getFramePointerSaveIndex(), llvm::MachineFunction::getFunction(), llvm::MachineOperand::getImm(), llvm::MachineFunction::getInfo(), llvm::PPCSubtarget::getInstrInfo(), llvm::getKillRegState(), llvm::PPCFunctionInfo::getMinReservedArea(), llvm::PPCFunctionInfo::getMustSaveCRs(), llvm::MachineFrameInfo::getObjectOffset(), llvm::PPCFunctionInfo::getPICBasePointerSaveIndex(), llvm::PPCSubtarget::getRegisterInfo(), getReturnSaveOffset(), llvm::PPCFunctionInfo::getROPProtectionHashSaveIndex(), llvm::MachineFrameInfo::getStackSize(), llvm::PPCFunctionInfo::getTailCallSPDelta(), llvm::MachineFunction::getTarget(), llvm::TargetOptions::GuaranteedTailCallOpt, llvm::PPCRegisterInfo::hasBasePointer(), llvm::PPCFunctionInfo::hasFastCall(), hasFP(), llvm::MachineFrameInfo::hasVarSizedObjects(), Info, llvm::MachineFrameInfo::isFixedObjectIndex(), llvm::MachineOperand::isImm(), llvm::PPCSubtarget::isPPC64(), llvm::PPCSubtarget::isSVR4ABI(), llvm::RegState::Kill, MBB, MBBI, llvm::PPCFunctionInfo::mustSaveLR(), MustSaveLR(), llvm::TargetMachine::Options, llvm::SmallVectorBase< Size_T >::size(), TII, and llvm::PPCFunctionInfo::usesPICBase().

◆ emitPrologue()

void PPCFrameLowering::emitPrologue ( MachineFunction MF,
MachineBasicBlock MBB 
) const
overridevirtual

emitProlog/emitEpilog - These methods insert prolog and epilog code into the function.

Implements llvm::TargetFrameLowering.

Definition at line 604 of file PPCFrameLowering.cpp.

References llvm::MachineInstrBuilder::addCFIIndex(), llvm::MachineInstrBuilder::addDef(), llvm::MachineFunction::addFrameInst(), llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), assert(), llvm::MachineBasicBlock::begin(), llvm::BuildMI(), llvm::MCCFIInstruction::cfiDefCfaOffset(), contains(), llvm::MCCFIInstruction::createDefCfaRegister(), llvm::MCCFIInstruction::createOffset(), llvm::MCCFIInstruction::createRegister(), determineFrameLayoutAndUpdate(), llvm::SmallVectorBase< Size_T >::empty(), llvm::PPCFunctionInfo::getBasePointerSaveIndex(), llvm::PPCRegisterInfo::getBaseRegister(), llvm::MachineFrameInfo::getCalleeSavedInfo(), llvm::MachineModuleInfo::getContext(), llvm::MachineFunction::getFrameInfo(), llvm::PPCFunctionInfo::getFramePointerSaveIndex(), llvm::MachineFunction::getInfo(), llvm::PPCSubtarget::getInstrInfo(), llvm::getKillRegState(), llvm::MachineFrameInfo::getMaxAlign(), llvm::MachineFunction::getMMI(), llvm::PPCFunctionInfo::getMustSaveCRs(), llvm::MachineFrameInfo::getObjectOffset(), llvm::PPCFunctionInfo::getPICBasePointerSaveIndex(), llvm::MCContext::getRegisterInfo(), llvm::PPCSubtarget::getRegisterInfo(), getReturnSaveOffset(), llvm::PPCFunctionInfo::getROPProtectionHashSaveIndex(), llvm::PPCTargetLowering::getStackProbeSize(), llvm::PPCSubtarget::getTargetLowering(), llvm::PPCRegisterInfo::hasBasePointer(), hasFP(), llvm::PPCTargetLowering::hasInlineStackProbe(), I, llvm::RegState::ImplicitKill, Info, llvm::PPCSubtarget::isAIXABI(), llvm::PPCSubtarget::isELFv2ABI(), llvm::MachineFrameInfo::isFixedObjectIndex(), llvm::MachineFrameInfo::isFrameAddressTaken(), llvm::PPCSubtarget::isPPC64(), llvm::PPCSubtarget::isSVR4ABI(), llvm::RegState::Kill, llvm_unreachable, llvm::Log2(), MBB, MBBI, MRI, llvm::PPCFunctionInfo::mustSaveLR(), MustSaveLR(), llvm::PPCFunctionInfo::mustSaveTOC(), llvm::MachineFunction::needsFrameMoves(), llvm::Offset, replaceFPWithRealFP(), llvm::MachineFrameInfo::setObjectOffset(), llvm::SmallVectorBase< Size_T >::size(), TII, and llvm::PPCFunctionInfo::usesPICBase().

◆ enableShrinkWrapping()

bool PPCFrameLowering::enableShrinkWrapping ( const MachineFunction MF) const
overridevirtual

Returns true if the target will correctly handle shrink wrapping.

Reimplemented from llvm::TargetFrameLowering.

Definition at line 2729 of file PPCFrameLowering.cpp.

References llvm::MachineFunction::getInfo(), llvm::MachineFunction::getSubtarget(), and llvm::PPCFunctionInfo::shrinkWrapDisabled().

◆ getBasePointerSaveOffset()

uint64_t PPCFrameLowering::getBasePointerSaveOffset ( ) const

getBasePointerSaveOffset - Return the previous frame offset to save the base pointer.

Definition at line 2725 of file PPCFrameLowering.cpp.

Referenced by determineCalleeSaves().

◆ getCalleeSavedSpillSlots()

const PPCFrameLowering::SpillSlot * PPCFrameLowering::getCalleeSavedSpillSlots ( unsigned NumEntries) const
overridevirtual

getCalleeSavedSpillSlots - This method returns a pointer to an array of pairs, that contains an entry for each callee saved register that must be spilled to a particular stack location if it is spilled.

Each entry in this array contains a <register,offset> pair, indicating the fixed offset from the incoming stack pointer that each register should be spilled at. If a register is not listed here, the code generator is allowed to spill it anywhere it chooses.

Reimplemented from llvm::TargetFrameLowering.

Definition at line 93 of file PPCFrameLowering.cpp.

References assert(), CALLEE_SAVED_FPRS, CALLEE_SAVED_GPRS32, CALLEE_SAVED_GPRS64, CALLEE_SAVED_VRS, llvm::PPCSubtarget::is32BitELFABI(), llvm::PPCSubtarget::is64BitELFABI(), llvm::PPCSubtarget::isAIXABI(), and llvm::PPCSubtarget::isPPC64().

◆ getFramePointerSaveOffset()

uint64_t PPCFrameLowering::getFramePointerSaveOffset ( ) const

getFramePointerSaveOffset - Return the previous frame offset to save the frame pointer.

Definition at line 2721 of file PPCFrameLowering.cpp.

Referenced by determineCalleeSaves().

◆ getLinkageSize()

unsigned llvm::PPCFrameLowering::getLinkageSize ( ) const
inline

getLinkageSize - Return the size of the PowerPC ABI linkage area.

Definition at line 165 of file PPCFrameLowering.h.

Referenced by determineFrameLayout(), mapArgRegToOffsetAIX(), and needStackSlotPassParameters().

◆ getReturnSaveOffset()

uint64_t llvm::PPCFrameLowering::getReturnSaveOffset ( ) const
inline

getReturnSaveOffset - Return the previous frame offset to save the return address.

Definition at line 149 of file PPCFrameLowering.h.

Referenced by emitEpilogue(), and emitPrologue().

◆ getStackThreshold()

uint64_t PPCFrameLowering::getStackThreshold ( ) const
overridevirtual

getStackThreshold - Return the maximum stack size

Reimplemented from llvm::TargetFrameLowering.

Definition at line 2735 of file PPCFrameLowering.cpp.

References llvm::TargetFrameLowering::getStackThreshold(), and llvm::PPCSubtarget::isPPC64().

◆ getTOCSaveOffset()

uint64_t PPCFrameLowering::getTOCSaveOffset ( ) const

getTOCSaveOffset - Return the previous frame offset to save the TOC register – 64-bit SVR4 ABI only.

Definition at line 2717 of file PPCFrameLowering.cpp.

Referenced by buildCallOperands(), and llvm::PPCInstrInfo::isTOCSaveMI().

◆ hasFP()

bool PPCFrameLowering::hasFP ( const MachineFunction MF) const
overridevirtual

hasFP - Return true if the specified function should have a dedicated frame pointer register.

For most targets this is true only if the function has variable sized allocas or if frame pointer elimination is disabled.

Implements llvm::TargetFrameLowering.

Definition at line 359 of file PPCFrameLowering.cpp.

References llvm::MachineFunction::getFrameInfo(), llvm::MachineFrameInfo::getStackSize(), and needsFP().

Referenced by emitEpilogue(), emitPrologue(), llvm::PPCRegisterInfo::getFrameRegister(), and llvm::PPCRegisterInfo::getRegPressureLimit().

◆ inlineStackProbe()

void PPCFrameLowering::inlineStackProbe ( MachineFunction MF,
MachineBasicBlock PrologueMBB 
) const
overridevirtual

Replace a StackProbe stub (if any) with the actual probe code inline.

Reimplemented from llvm::TargetFrameLowering.

Definition at line 1232 of file PPCFrameLowering.cpp.

References llvm::MachineInstrBuilder::addCFIIndex(), llvm::MachineFunction::addFrameInst(), llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addMBB(), llvm::MachineInstrBuilder::addReg(), llvm::MachineBasicBlock::addSuccessor(), assert(), llvm::MachineBasicBlock::begin(), buildDefCFAReg(), llvm::BuildMI(), llvm::MCCFIInstruction::cfiDefCfa(), llvm::MCCFIInstruction::createDefCfaRegister(), llvm::MachineFunction::CreateMachineBasicBlock(), DL, llvm::MachineBasicBlock::end(), llvm::find_if(), llvm::MachineBasicBlock::findDebugLoc(), llvm::PPCRegisterInfo::getBaseRegister(), llvm::MachineBasicBlock::getBasicBlock(), llvm::MachineModuleInfo::getContext(), llvm::MachineFunction::getFrameInfo(), llvm::PPCSubtarget::getInstrInfo(), llvm::ilist_node_impl< OptionsT >::getIterator(), llvm::MachineFrameInfo::getMaxAlign(), llvm::MachineFunction::getMMI(), llvm::MachineBasicBlock::getParent(), llvm::PPCSubtarget::getRedZoneSize(), llvm::MCContext::getRegisterInfo(), llvm::PPCSubtarget::getRegisterInfo(), llvm::PPCTargetLowering::getStackProbeSize(), llvm::PPCSubtarget::getTargetLowering(), llvm::PPCRegisterInfo::hasBasePointer(), llvm::MachineFunction::insert(), llvm::PPCSubtarget::isAIXABI(), llvm::isPowerOf2_64(), llvm::PPCSubtarget::isPPC64(), llvm::PPCSubtarget::isSVR4ABI(), llvm::RegState::Kill, llvm::Log2(), MBB, MBBI, MI, MRI, llvm::MachineFunction::needsFrameMoves(), llvm::Offset, llvm::PPC::PRED_GE, llvm::PPC::PRED_LT, llvm::recomputeLiveIns(), llvm::MachineBasicBlock::splice(), TII, and llvm::MachineBasicBlock::transferSuccessorsAndUpdatePHIs().

◆ needsFP()

bool PPCFrameLowering::needsFP ( const MachineFunction MF) const

◆ processFunctionBeforeFrameFinalized()

void PPCFrameLowering::processFunctionBeforeFrameFinalized ( MachineFunction MF,
RegScavenger RS = nullptr 
) const
overridevirtual

processFunctionBeforeFrameFinalized - This method is called immediately before the specified function's frame layout (MF.getFrameInfo()) is finalized.

Once the frame is finalized, MO_FrameIndex operands are replaced with direct constants. This method is optional.

Reimplemented from llvm::TargetFrameLowering.

Definition at line 2061 of file PPCFrameLowering.cpp.

References addScavengingSpillSlot(), assert(), contains(), llvm::PPCFunctionInfo::getBasePointerSaveIndex(), llvm::PPCRegisterInfo::getBaseRegister(), llvm::MachineFrameInfo::getCalleeSavedInfo(), llvm::MachineFunction::getFrameInfo(), llvm::PPCFunctionInfo::getFramePointerSaveIndex(), llvm::MachineFunction::getInfo(), llvm::MachineFrameInfo::getObjectOffset(), llvm::PPCFunctionInfo::getPICBasePointerSaveIndex(), llvm::PPCSubtarget::getRegisterInfo(), llvm::MachineFrameInfo::getRestorePoint(), llvm::MachineFrameInfo::getSavePoint(), llvm::PPCFunctionInfo::getTailCallSPDelta(), llvm::MachineFunction::getTarget(), llvm::TargetOptions::GuaranteedTailCallOpt, llvm::PPCRegisterInfo::hasBasePointer(), llvm::MachineFrameInfo::hasTailCall(), I, llvm::PPCSubtarget::is32BitELFABI(), llvm::PPCSubtarget::isPPC64(), llvm::MachineBasicBlock::isReturnBlock(), llvm_unreachable, MBB, llvm::PPCFunctionInfo::mustSaveTOC(), needsFP(), llvm::TargetMachine::Options, llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::MachineFrameInfo::setObjectOffset(), llvm::SmallVectorBase< Size_T >::size(), spillsCR(), TRI, and llvm::PPCFunctionInfo::usesPICBase().

◆ replaceFPWithRealFP()

void PPCFrameLowering::replaceFPWithRealFP ( MachineFunction MF) const

◆ restoreCalleeSavedRegisters()

bool PPCFrameLowering::restoreCalleeSavedRegisters ( MachineBasicBlock MBB,
MachineBasicBlock::iterator  MI,
MutableArrayRef< CalleeSavedInfo CSI,
const TargetRegisterInfo TRI 
) const
overridevirtual

restoreCalleeSavedRegisters - Issues instruction(s) to restore all callee saved registers and returns true if it isn't possible / profitable to do so by issuing a series of load instructions via loadRegToStackSlot().

If it returns true, and any of the registers in CSI is not restored, it sets the corresponding Restored flag in CSI to false. Returns false otherwise.

Reimplemented from llvm::TargetFrameLowering.

Definition at line 2596 of file PPCFrameLowering.cpp.

References llvm::MachineInstrBuilder::addReg(), assert(), llvm::MachineBasicBlock::begin(), llvm::BuildMI(), DL, llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::PPCSubtarget::getInstrInfo(), llvm::getKillRegState(), llvm::MachineBasicBlock::getParent(), llvm::Function::hasFnAttribute(), I, llvm::PPCSubtarget::is32BitELFABI(), isCalleeSavedCR(), llvm_unreachable, llvm::HexagonInstrInfo::loadRegFromStackSlot(), MBB, MI, llvm::PPCFunctionInfo::mustSaveTOC(), needsFP(), llvm::PPCSubtarget::needsSwapsForVSXMemOps(), restoreCRs(), llvm::BitVector::set(), llvm::ArrayRef< T >::size(), TII, and TRI.

◆ spillCalleeSavedRegisters()

bool PPCFrameLowering::spillCalleeSavedRegisters ( MachineBasicBlock MBB,
MachineBasicBlock::iterator  MI,
ArrayRef< CalleeSavedInfo CSI,
const TargetRegisterInfo TRI 
) const
overridevirtual

◆ targetHandlesStackFrameRounding()

bool llvm::PPCFrameLowering::targetHandlesStackFrameRounding ( ) const
inlineoverridevirtual

targetHandlesStackFrameRounding - Returns true if the target is responsible for rounding up the stack frame (probably at emitPrologue time).

Reimplemented from llvm::TargetFrameLowering.

Definition at line 145 of file PPCFrameLowering.h.


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