LLVM: llvm::TargetFrameLowering Class Reference (original) (raw)

Information about stack frame layout on the target. More...

#include "[llvm/CodeGen/TargetFrameLowering.h](TargetFrameLowering%5F8h%5Fsource.html)"

Information about stack frame layout on the target.

It holds the direction of stack growth, the known stack alignment on entry to each function, and the offset to the locals area.

The offset to the local area is the offset from the stack pointer on function entry to the first location where function data (local variables, spill locations) can be stored.

Definition at line 45 of file TargetFrameLowering.h.

◆ StackDirection

◆ ~TargetFrameLowering()

◆ adjustForHiPEPrologue()

◆ adjustForSegmentedStacks()

◆ alignSPAdjust()

◆ allocateScavengingFrameIndexesNearIncomingSP()

◆ assignCalleeSavedSpillSlots() [1/2]

◆ assignCalleeSavedSpillSlots() [2/2]

◆ canSimplifyCallFramePseudos()

canSimplifyCallFramePseudos - When possible, it's best to simplify the call frame pseudo ops before doing frame index elimination.

This is possible only when frame index references between the pseudos won't need adjusting for the call frame adjustments. Normally, that's true if the function has a reserved call frame or a frame pointer. Some targets (Thumb2, for example) may have more complicated criteria, however, and can override this behavior.

Reimplemented in llvm::ARMFrameLowering, llvm::AVRFrameLowering, llvm::HexagonFrameLowering, llvm::M68kFrameLowering, and llvm::X86FrameLowering.

Definition at line 305 of file TargetFrameLowering.h.

References hasFP(), and hasReservedCallFrame().

◆ canUseAsEpilogue()

◆ canUseAsPrologue()

◆ determineCalleeSaves()

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 in llvm::AArch64FrameLowering, llvm::ARCFrameLowering, llvm::ARMFrameLowering, llvm::BPFFrameLowering, llvm::CSKYFrameLowering, llvm::HexagonFrameLowering, llvm::LoongArchFrameLowering, llvm::Mips16FrameLowering, llvm::MipsSEFrameLowering, llvm::RISCVFrameLowering, llvm::SystemZELFFrameLowering, llvm::SystemZXPLINKFrameLowering, llvm::XtensaFrameLowering, llvm::SIFrameLowering, llvm::AVRFrameLowering, llvm::LanaiFrameLowering, llvm::M68kFrameLowering, llvm::PPCFrameLowering, llvm::SparcFrameLowering, llvm::VEFrameLowering, llvm::X86FrameLowering, and llvm::XCoreFrameLowering.

Definition at line 95 of file TargetFrameLoweringImpl.cpp.

References llvm::MachineFunction::callsUnwindInit(), enableCalleeSaveSkip(), llvm::TargetOptions::EnableIPRA, llvm::MachineRegisterInfo::getCalleeSavedRegs(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getRegInfo(), llvm::TargetSubtargetInfo::getRegisterInfo(), llvm::MachineFunction::getSubtarget(), llvm::MachineFunction::getTarget(), llvm::Function::hasFnAttribute(), isProfitableForNoCSROpt(), isSafeForNoCSROpt(), MRI, llvm::TargetMachine::Options, llvm::BitVector::resize(), llvm::BitVector::set(), and TRI.

Referenced by llvm::AArch64FrameLowering::determineCalleeSaves(), llvm::ARCFrameLowering::determineCalleeSaves(), llvm::ARMFrameLowering::determineCalleeSaves(), llvm::BPFFrameLowering::determineCalleeSaves(), llvm::CSKYFrameLowering::determineCalleeSaves(), llvm::HexagonFrameLowering::determineCalleeSaves(), llvm::LoongArchFrameLowering::determineCalleeSaves(), llvm::Mips16FrameLowering::determineCalleeSaves(), llvm::MipsSEFrameLowering::determineCalleeSaves(), llvm::RISCVFrameLowering::determineCalleeSaves(), llvm::SystemZELFFrameLowering::determineCalleeSaves(), llvm::SystemZXPLINKFrameLowering::determineCalleeSaves(), llvm::XtensaFrameLowering::determineCalleeSaves(), llvm::SIFrameLowering::determineCalleeSaves(), llvm::AVRFrameLowering::determineCalleeSaves(), llvm::LanaiFrameLowering::determineCalleeSaves(), llvm::M68kFrameLowering::determineCalleeSaves(), llvm::PPCFrameLowering::determineCalleeSaves(), llvm::SparcFrameLowering::determineCalleeSaves(), llvm::VEFrameLowering::determineCalleeSaves(), llvm::X86FrameLowering::determineCalleeSaves(), llvm::XCoreFrameLowering::determineCalleeSaves(), and llvm::SIFrameLowering::determineCalleeSavesSGPR().

◆ eliminateCallFramePseudoInstr()

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 in llvm::AArch64FrameLowering, llvm::ARCFrameLowering, llvm::HexagonFrameLowering, llvm::LanaiFrameLowering, llvm::MipsFrameLowering, llvm::MSP430FrameLowering, llvm::NVPTXFrameLowering, llvm::PPCFrameLowering, llvm::SparcFrameLowering, llvm::VEFrameLowering, llvm::WebAssemblyFrameLowering, llvm::XCoreFrameLowering, llvm::XtensaFrameLowering, llvm::SIFrameLowering, llvm::Thumb1FrameLowering, llvm::AVRFrameLowering, llvm::BPFFrameLowering, llvm::CSKYFrameLowering, llvm::LoongArchFrameLowering, llvm::M68kFrameLowering, llvm::RISCVFrameLowering, and llvm::X86FrameLowering.

Definition at line 397 of file TargetFrameLowering.h.

References llvm_unreachable.

◆ emitCalleeSavedFrameMovesFullCFA()

◆ emitEpilogue()

Implemented in llvm::DirectXFrameLowering, llvm::AArch64FrameLowering, llvm::R600FrameLowering, llvm::SIFrameLowering, llvm::ARCFrameLowering, llvm::ARMFrameLowering, llvm::Thumb1FrameLowering, llvm::AVRFrameLowering, llvm::BPFFrameLowering, llvm::CSKYFrameLowering, llvm::HexagonFrameLowering, llvm::LanaiFrameLowering, llvm::LoongArchFrameLowering, llvm::M68kFrameLowering, llvm::Mips16FrameLowering, llvm::MipsSEFrameLowering, llvm::MSP430FrameLowering, llvm::NVPTXFrameLowering, llvm::PPCFrameLowering, llvm::RISCVFrameLowering, llvm::SparcFrameLowering, llvm::SPIRVFrameLowering, llvm::SystemZELFFrameLowering, llvm::SystemZXPLINKFrameLowering, llvm::VEFrameLowering, llvm::WebAssemblyFrameLowering, llvm::X86FrameLowering, llvm::XCoreFrameLowering, and llvm::XtensaFrameLowering.

◆ emitPrologue()

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

Implemented in llvm::DirectXFrameLowering, llvm::XtensaFrameLowering, llvm::AArch64FrameLowering, llvm::R600FrameLowering, llvm::SIFrameLowering, llvm::ARCFrameLowering, llvm::ARMFrameLowering, llvm::Thumb1FrameLowering, llvm::AVRFrameLowering, llvm::BPFFrameLowering, llvm::CSKYFrameLowering, llvm::HexagonFrameLowering, llvm::LanaiFrameLowering, llvm::LoongArchFrameLowering, llvm::M68kFrameLowering, llvm::Mips16FrameLowering, llvm::MipsSEFrameLowering, llvm::MSP430FrameLowering, llvm::NVPTXFrameLowering, llvm::PPCFrameLowering, llvm::RISCVFrameLowering, llvm::SparcFrameLowering, llvm::SPIRVFrameLowering, llvm::SystemZELFFrameLowering, llvm::SystemZXPLINKFrameLowering, llvm::VEFrameLowering, llvm::WebAssemblyFrameLowering, llvm::X86FrameLowering, and llvm::XCoreFrameLowering.

◆ emitRemarks()

This method is called at the end of prolog/epilog code insertion, so targets can emit remarks based on the final frame layout.

Definition at line 482 of file TargetFrameLowering.h.

◆ emitZeroCallUsedRegs()

◆ enableCalleeSaveSkip()

◆ enableCFIFixup()

◆ enableShrinkWrapping()

◆ enableStackSlotScavenging()

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.

Reimplemented in llvm::AArch64FrameLowering.

Definition at line 205 of file TargetFrameLowering.h.

◆ getCalleeSavedSpillSlots()

◆ getCalleeSaves()

◆ getDwarfFrameBase()

◆ getFrameIndexReference()

getFrameIndexReference - This method should return the base register and offset used to reference a frame index location.

Returns the displacement from the frame register to the stack frame of the specified index, along with the frame register used (in output arg FrameReg).

The offset is returned directly, and the base register is returned via FrameReg.

This is the default implementation which is overridden for some targets.

Reimplemented in llvm::AArch64FrameLowering, llvm::R600FrameLowering, llvm::SIFrameLowering, llvm::ARMFrameLowering, llvm::CSKYFrameLowering, llvm::HexagonFrameLowering, llvm::LoongArchFrameLowering, llvm::M68kFrameLowering, llvm::MipsSEFrameLowering, llvm::NVPTXFrameLowering, llvm::RISCVFrameLowering, llvm::SparcFrameLowering, llvm::SystemZELFFrameLowering, llvm::VEFrameLowering, and llvm::X86FrameLowering.

Definition at line 48 of file TargetFrameLoweringImpl.cpp.

References llvm::StackOffset::getFixed(), llvm::MachineFunction::getFrameInfo(), llvm::TargetRegisterInfo::getFrameRegister(), llvm::MachineFrameInfo::getObjectOffset(), llvm::MachineFrameInfo::getOffsetAdjustment(), getOffsetOfLocalArea(), llvm::TargetSubtargetInfo::getRegisterInfo(), llvm::MachineFrameInfo::getStackSize(), and llvm::MachineFunction::getSubtarget().

Referenced by canSpillOnFrameIndexAccess(), llvm::SystemZRegisterInfo::eliminateFrameIndex(), llvm::LoongArchRegisterInfo::eliminateFrameIndex(), emitDebugValueComment(), llvm::SystemZELFFrameLowering::getFrameIndexReference(), getFrameIndexReferencePreferSP(), and getNonLocalFrameIndexReference().

◆ getFrameIndexReferenceFromSP()

◆ getFrameIndexReferencePreferSP()

Same as getFrameIndexReference, except that the stack pointer (as opposed to the frame pointer) will be the preferred value for FrameReg.

This is generally used for emitting statepoint or EH tables that use offsets from RSP. If IgnoreSPUpdates is true, the returned offset is only guaranteed to be valid with respect to the value of SP at the end of the prologue.

Reimplemented in llvm::AArch64FrameLowering, and llvm::X86FrameLowering.

Definition at line 327 of file TargetFrameLowering.h.

References getFrameIndexReference().

◆ getInitialCFAOffset()

◆ getInitialCFARegister()

◆ getNonLocalFrameIndexReference()

◆ getOffsetOfLocalArea()

getOffsetOfLocalArea - This method returns the offset of the local area from the stack pointer on entrance to a function.

Definition at line 144 of file TargetFrameLowering.h.

Referenced by llvm::M68kFrameLowering::assignCalleeSavedSpillSlots(), llvm::X86FrameLowering::assignCalleeSavedSpillSlots(), llvm::M68kRegisterInfo::eliminateFrameIndex(), llvm::AVRRegisterInfo::eliminateFrameIndex(), llvm::SystemZXPLINKFrameLowering::emitPrologue(), emitVGSaveRestore(), getFrameIndexReference(), llvm::LoongArchFrameLowering::getFrameIndexReference(), llvm::M68kFrameLowering::getFrameIndexReference(), llvm::MipsSEFrameLowering::getFrameIndexReference(), llvm::NVPTXFrameLowering::getFrameIndexReference(), llvm::RISCVFrameLowering::getFrameIndexReference(), llvm::X86FrameLowering::getFrameIndexReference(), getFrameIndexReferenceFromSP(), llvm::AArch64FrameLowering::getFrameIndexReferenceFromSP(), llvm::X86FrameLowering::getFrameIndexReferenceSP(), and llvm::MachineFrameInfo::print().

◆ getStackAlign()

getStackAlignment - This method returns the number of bytes to which the stack pointer must be aligned on entry to a function.

Typically, this is the largest alignment for any data object in the target.

Definition at line 105 of file TargetFrameLowering.h.

Referenced by llvm::PPCFrameLowering::addScavengingSpillSlot(), llvm::RISCVFrameLowering::allocateStack(), assignCalleeSavedSpillSlots(), llvm::HexagonFrameLowering::assignCalleeSavedSpillSlots(), llvm::SystemZXPLINKFrameLowering::assignCalleeSavedSpillSlots(), llvm::RISCVFrameLowering::assignCalleeSavedSpillSlots(), checkNumAlignedDPRCS2Regs(), computeFPBPAlignmentGap(), llvm::ARMFrameLowering::determineCalleeSaves(), llvm::PPCFrameLowering::determineFrameLayout(), llvm::AArch64FrameLowering::eliminateCallFramePseudoInstr(), llvm::MSP430FrameLowering::eliminateCallFramePseudoInstr(), llvm::XCoreFrameLowering::eliminateCallFramePseudoInstr(), llvm::SIFrameLowering::eliminateCallFramePseudoInstr(), llvm::Thumb1FrameLowering::eliminateCallFramePseudoInstr(), llvm::AVRFrameLowering::eliminateCallFramePseudoInstr(), llvm::RISCVFrameLowering::eliminateCallFramePseudoInstr(), llvm::X86FrameLowering::eliminateCallFramePseudoInstr(), llvm::RISCVTargetLowering::emitDynamicProbedAlloc(), llvm::RISCVFrameLowering::emitEpilogue(), llvm::ARMFrameLowering::emitPrologue(), llvm::RISCVFrameLowering::emitPrologue(), llvm::XCoreFrameLowering::emitPrologue(), llvm::MachineFrameInfo::estimateStackSize(), llvm::X86InstrInfo::foldMemoryOperandImpl(), llvm::VESubtarget::getAdjustedFrameSize(), llvm::LoongArchFrameLowering::getFirstSPAdjustAmount(), llvm::RISCVFrameLowering::getFirstSPAdjustAmount(), getFnStackAlignment(), llvm::SelectionDAG::getReducedAlign(), llvm::X86InstrInfo::getSPAdjust(), llvm::RISCVFrameLowering::getStackSizeWithRVVPadding(), llvm::X86FrameLowering::getWin64EHFrameIndexRef(), llvm::AArch64FrameLowering::getWinEHFuncletFrameSize(), llvm::MipsTargetLowering::HandleByVal(), llvm::X86InstrInfo::loadRegFromStackSlot(), llvm::XtensaTargetLowering::LowerCall(), llvm::SITargetLowering::LowerDYNAMIC_STACKALLOC(), llvm::VETargetLowering::lowerDYNAMIC_STACKALLOC(), llvm::ARMBaseRegisterInfo::needsFrameBaseReg(), llvm::PPCRegisterInfo::prepareDynamicAlloca(), llvm::HexagonFrameLowering::processFunctionBeforeFrameFinalized(), llvm::HexagonDAGToDAGISel::SelectFrameIndex(), llvm::FunctionLoweringInfo::set(), and llvm::X86InstrInfo::storeRegToStackSlot().

◆ getStackAlignment()

◆ getStackGrowthDirection()

◆ getStackIDForScalableVectors()

◆ getStackThreshold()

◆ getTransientStackAlign()

◆ getWinEHParentFrameOffset()

◆ hasFP()

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. For all targets, this is false if the function has the naked attribute since there is no prologue to set up the frame pointer.

Definition at line 285 of file TargetFrameLowering.h.

References llvm::MachineFunction::getFunction(), llvm::Function::hasFnAttribute(), and hasFPImpl().

Referenced by allocateScavengingFrameIndexesNearIncomingSP(), llvm::ARCFrameLowering::assignCalleeSavedSpillSlots(), llvm::M68kFrameLowering::assignCalleeSavedSpillSlots(), llvm::SystemZXPLINKFrameLowering::assignCalleeSavedSpillSlots(), llvm::X86FrameLowering::assignCalleeSavedSpillSlots(), llvm::AArch64FrameLowering::assignCalleeSavedSpillSlots(), llvm::CodeViewDebug::beginFunctionImpl(), canSimplifyCallFramePseudos(), llvm::M68kFrameLowering::canSimplifyCallFramePseudos(), llvm::X86FrameLowering::canSimplifyCallFramePseudos(), llvm::X86FrameLowering::canUseLEAForSPInEpilogue(), llvm::AArch64FrameLowering::canUseRedZone(), llvm::AArch64FrameLowering::determineCalleeSaves(), llvm::ARMFrameLowering::determineCalleeSaves(), llvm::CSKYFrameLowering::determineCalleeSaves(), llvm::LoongArchFrameLowering::determineCalleeSaves(), llvm::Mips16FrameLowering::determineCalleeSaves(), llvm::MipsSEFrameLowering::determineCalleeSaves(), llvm::RISCVFrameLowering::determineCalleeSaves(), llvm::SystemZELFFrameLowering::determineCalleeSaves(), llvm::SystemZXPLINKFrameLowering::determineCalleeSaves(), llvm::XtensaFrameLowering::determineCalleeSaves(), llvm::AVRFrameLowering::determineCalleeSaves(), llvm::XCoreFrameLowering::determineCalleeSaves(), llvm::SIFrameLowering::determineCalleeSavesSGPR(), llvm::SIFrameLowering::determinePrologEpilogSGPRSaves(), llvm::ARCFrameLowering::eliminateCallFramePseudoInstr(), llvm::MSP430FrameLowering::eliminateCallFramePseudoInstr(), llvm::WebAssemblyFrameLowering::eliminateCallFramePseudoInstr(), llvm::M68kFrameLowering::eliminateCallFramePseudoInstr(), llvm::X86FrameLowering::eliminateCallFramePseudoInstr(), llvm::ARCRegisterInfo::eliminateFrameIndex(), llvm::LanaiRegisterInfo::eliminateFrameIndex(), llvm::M68kRegisterInfo::eliminateFrameIndex(), llvm::MSP430RegisterInfo::eliminateFrameIndex(), llvm::XCoreRegisterInfo::eliminateFrameIndex(), llvm::X86FrameLowering::emitCalleeSavedFrameMovesFullCFA(), llvm::SystemZTargetLowering::emitEHSjLjSetJmp(), llvm::SIFrameLowering::emitEntryFunctionPrologue(), llvm::AArch64FrameLowering::emitEpilogue(), llvm::SIFrameLowering::emitEpilogue(), llvm::ARCFrameLowering::emitEpilogue(), llvm::Thumb1FrameLowering::emitEpilogue(), llvm::AVRFrameLowering::emitEpilogue(), llvm::CSKYFrameLowering::emitEpilogue(), llvm::LoongArchFrameLowering::emitEpilogue(), llvm::M68kFrameLowering::emitEpilogue(), llvm::Mips16FrameLowering::emitEpilogue(), llvm::MipsSEFrameLowering::emitEpilogue(), llvm::MSP430FrameLowering::emitEpilogue(), llvm::PPCFrameLowering::emitEpilogue(), llvm::RISCVFrameLowering::emitEpilogue(), llvm::WebAssemblyFrameLowering::emitEpilogue(), llvm::X86FrameLowering::emitEpilogue(), llvm::XCoreFrameLowering::emitEpilogue(), llvm::XtensaFrameLowering::emitEpilogue(), llvm::X86AsmPrinter::emitInstruction(), llvm::XtensaFrameLowering::emitPrologue(), llvm::AArch64FrameLowering::emitPrologue(), llvm::SIFrameLowering::emitPrologue(), llvm::ARCFrameLowering::emitPrologue(), llvm::ARMFrameLowering::emitPrologue(), llvm::Thumb1FrameLowering::emitPrologue(), llvm::AVRFrameLowering::emitPrologue(), llvm::CSKYFrameLowering::emitPrologue(), llvm::LoongArchFrameLowering::emitPrologue(), llvm::M68kFrameLowering::emitPrologue(), llvm::Mips16FrameLowering::emitPrologue(), llvm::MipsSEFrameLowering::emitPrologue(), llvm::MSP430FrameLowering::emitPrologue(), llvm::PPCFrameLowering::emitPrologue(), llvm::RISCVFrameLowering::emitPrologue(), llvm::SystemZELFFrameLowering::emitPrologue(), llvm::SystemZXPLINKFrameLowering::emitPrologue(), llvm::WebAssemblyFrameLowering::emitPrologue(), llvm::X86FrameLowering::emitPrologue(), llvm::XCoreFrameLowering::emitPrologue(), llvm::X86FrameLowering::enableShrinkWrapping(), llvm::AArch64FrameLowering::enableStackSlotScavenging(), estimateRSStackSizeLimit(), ExpandMOVImmSExti8(), llvm::MSP430RegisterInfo::getCalleeSavedRegs(), llvm::XCoreRegisterInfo::getCalleeSavedRegs(), llvm::CSKYFrameLowering::getFrameIndexReference(), llvm::HexagonFrameLowering::getFrameIndexReference(), llvm::LoongArchFrameLowering::getFrameIndexReference(), llvm::M68kFrameLowering::getFrameIndexReference(), llvm::MipsSEFrameLowering::getFrameIndexReference(), llvm::VEFrameLowering::getFrameIndexReference(), llvm::AArch64RegisterInfo::getFrameRegister(), llvm::SIRegisterInfo::getFrameRegister(), llvm::ARCRegisterInfo::getFrameRegister(), llvm::AVRRegisterInfo::getFrameRegister(), llvm::CSKYRegisterInfo::getFrameRegister(), llvm::HexagonRegisterInfo::getFrameRegister(), llvm::LoongArchRegisterInfo::getFrameRegister(), llvm::M68kRegisterInfo::getFrameRegister(), llvm::MSP430RegisterInfo::getFrameRegister(), llvm::PPCRegisterInfo::getFrameRegister(), llvm::RISCVRegisterInfo::getFrameRegister(), llvm::SystemZRegisterInfo::getFrameRegister(), llvm::WebAssemblyRegisterInfo::getFrameRegister(), llvm::X86RegisterInfo::getFrameRegister(), llvm::XCoreRegisterInfo::getFrameRegister(), llvm::XtensaRegisterInfo::getFrameRegister(), llvm::X86RegisterInfo::getPointerRegClass(), llvm::X86TargetLowering::getRegisterByName(), llvm::AArch64RegisterInfo::getRegPressureLimit(), llvm::MipsRegisterInfo::getRegPressureLimit(), llvm::PPCRegisterInfo::getRegPressureLimit(), llvm::X86RegisterInfo::getRegPressureLimit(), llvm::CSKYRegisterInfo::getReservedRegs(), llvm::LoongArchRegisterInfo::getReservedRegs(), llvm::M68kRegisterInfo::getReservedRegs(), llvm::MipsRegisterInfo::getReservedRegs(), llvm::MSP430RegisterInfo::getReservedRegs(), llvm::RISCVRegisterInfo::getReservedRegs(), llvm::SystemZRegisterInfo::getReservedRegs(), llvm::X86RegisterInfo::getReservedRegs(), llvm::XCoreRegisterInfo::getReservedRegs(), llvm::XtensaRegisterInfo::getReservedRegs(), llvm::AArch64RegisterInfo::getStrictlyReservedRegs(), hasReservedCallFrame(), llvm::AVRFrameLowering::hasReservedCallFrame(), llvm::RISCVFrameLowering::hasReservedCallFrame(), llvm::SystemZXPLINKFrameLowering::inlineStackProbe(), llvm::X86RegisterInfo::isFixedRegister(), llvm::ARMFrameLowering::isFPReserved(), llvm::AArch64RegisterInfo::needsFrameBaseReg(), llvm::ARMBaseRegisterInfo::needsFrameBaseReg(), llvm::RISCVRegisterInfo::needsFrameBaseReg(), llvm::X86FrameLowering::orderFrameObjects(), llvm::MSP430FrameLowering::processFunctionBeforeFrameFinalized(), llvm::XCoreFrameLowering::processFunctionBeforeFrameFinalized(), llvm::ARMFrameLowering::requiresAAPCSFrameRecord(), llvm::ARMFrameLowering::ResolveFrameIndexReference(), llvm::AArch64FrameLowering::resolveFrameOffsetReference(), llvm::SystemZELFFrameLowering::restoreCalleeSavedRegisters(), llvm::AArch64FrameLowering::restoreCalleeSavedRegisters(), llvm::Thumb1FrameLowering::restoreCalleeSavedRegisters(), llvm::XCoreFrameLowering::restoreCalleeSavedRegisters(), llvm::AArch64FrameLowering::spillCalleeSavedRegisters(), llvm::Thumb1FrameLowering::spillCalleeSavedRegisters(), llvm::XCoreFrameLowering::spillCalleeSavedRegisters(), llvm::X86FrameLowering::spillFPBP(), and llvm::AArch64RegisterInfo::useFPForScavengingIndex().

◆ hasFPImpl()

Implemented in llvm::DirectXFrameLowering, llvm::LanaiFrameLowering, llvm::AArch64FrameLowering, llvm::R600FrameLowering, llvm::SIFrameLowering, llvm::ARCFrameLowering, llvm::ARMFrameLowering, llvm::AVRFrameLowering, llvm::BPFFrameLowering, llvm::CSKYFrameLowering, llvm::HexagonFrameLowering, llvm::LoongArchFrameLowering, llvm::M68kFrameLowering, llvm::MipsFrameLowering, llvm::MSP430FrameLowering, llvm::NVPTXFrameLowering, llvm::PPCFrameLowering, llvm::RISCVFrameLowering, llvm::SparcFrameLowering, llvm::SPIRVFrameLowering, llvm::SystemZELFFrameLowering, llvm::SystemZXPLINKFrameLowering, llvm::VEFrameLowering, llvm::WebAssemblyFrameLowering, llvm::X86FrameLowering, llvm::XCoreFrameLowering, and llvm::XtensaFrameLowering.

Referenced by hasFP().

◆ hasReservedCallFrame()

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.

This eliminates the need for add/sub sp brackets around call sites. Returns true if the call frame is included as part of the stack frame.

Reimplemented in llvm::AArch64FrameLowering, llvm::ARMFrameLowering, llvm::Thumb1FrameLowering, llvm::AVRFrameLowering, llvm::CSKYFrameLowering, llvm::HexagonFrameLowering, llvm::LoongArchFrameLowering, llvm::M68kFrameLowering, llvm::Mips16FrameLowering, llvm::MipsSEFrameLowering, llvm::MSP430FrameLowering, llvm::RISCVFrameLowering, llvm::SparcFrameLowering, llvm::SystemZFrameLowering, llvm::VEFrameLowering, llvm::WebAssemblyFrameLowering, and llvm::X86FrameLowering.

Definition at line 294 of file TargetFrameLowering.h.

References hasFP().

Referenced by llvm::MipsRegisterInfo::canRealignStack(), canSimplifyCallFramePseudos(), llvm::MipsFrameLowering::eliminateCallFramePseudoInstr(), llvm::XCoreFrameLowering::eliminateCallFramePseudoInstr(), llvm::XtensaFrameLowering::eliminateCallFramePseudoInstr(), llvm::SIFrameLowering::eliminateCallFramePseudoInstr(), and llvm::MachineFrameInfo::estimateStackSize().

◆ inlineStackProbe()

◆ isProfitableForNoCSROpt()

◆ isSafeForNoCSROpt()

◆ isStackIdSafeForLocalArea()

◆ isStackRealignable()

◆ isSupportedStackID()

◆ needsFrameIndexResolution()

◆ orderFrameObjects()

◆ processFunctionBeforeFrameFinalized()

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 in llvm::AArch64FrameLowering, llvm::ARCFrameLowering, llvm::LoongArchFrameLowering, llvm::RISCVFrameLowering, llvm::SystemZELFFrameLowering, llvm::SystemZXPLINKFrameLowering, llvm::X86FrameLowering, llvm::XtensaFrameLowering, llvm::SIFrameLowering, llvm::ARMFrameLowering, llvm::HexagonFrameLowering, llvm::MSP430FrameLowering, llvm::PPCFrameLowering, and llvm::XCoreFrameLowering.

Definition at line 375 of file TargetFrameLowering.h.

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

◆ processFunctionBeforeFrameIndicesReplaced()

◆ resetCFIToInitialState()

◆ restoreCalleeSavedRegisters()

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 in llvm::SystemZELFFrameLowering, llvm::SystemZXPLINKFrameLowering, llvm::AArch64FrameLowering, llvm::ARCFrameLowering, llvm::ARMFrameLowering, llvm::Thumb1FrameLowering, llvm::AVRFrameLowering, llvm::CSKYFrameLowering, llvm::HexagonFrameLowering, llvm::M68kFrameLowering, llvm::Mips16FrameLowering, llvm::MSP430FrameLowering, llvm::PPCFrameLowering, llvm::RISCVFrameLowering, llvm::X86FrameLowering, llvm::XCoreFrameLowering, and llvm::XtensaFrameLowering.

Definition at line 273 of file TargetFrameLowering.h.

Referenced by insertCSRRestores(), and llvm::XtensaFrameLowering::restoreCalleeSavedRegisters().

◆ spillCalleeSavedRegisters()

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().

Returns false otherwise.

Reimplemented in llvm::SystemZELFFrameLowering, llvm::SystemZXPLINKFrameLowering, llvm::AArch64FrameLowering, llvm::ARCFrameLowering, llvm::ARMFrameLowering, llvm::Thumb1FrameLowering, llvm::AVRFrameLowering, llvm::CSKYFrameLowering, llvm::HexagonFrameLowering, llvm::LoongArchFrameLowering, llvm::M68kFrameLowering, llvm::Mips16FrameLowering, llvm::MipsSEFrameLowering, llvm::MSP430FrameLowering, llvm::PPCFrameLowering, llvm::RISCVFrameLowering, llvm::X86FrameLowering, llvm::XCoreFrameLowering, and llvm::XtensaFrameLowering.

Definition at line 259 of file TargetFrameLowering.h.

Referenced by insertCSRSaves().

◆ spillFPBP()

◆ stackProbeFunctionModifiesSP()

◆ targetHandlesStackFrameRounding()

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

• include/llvm/CodeGen/TargetFrameLowering.h
• lib/CodeGen/TargetFrameLoweringImpl.cpp