#include "Target/AArch64/AArch64FrameLowering.h"
Public Member Functions | |
| AArch64FrameLowering () | |
| void | emitCalleeSavedFrameMoves (MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI) const |
| 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). More... | |
| void | emitPrologue (MachineFunction &MF, MachineBasicBlock &MBB) const override |
| emitProlog/emitEpilog - These methods insert prolog and epilog code into the function. More... | |
| void | emitEpilogue (MachineFunction &MF, MachineBasicBlock &MBB) const override |
| bool | canUseAsPrologue (const MachineBasicBlock &MBB) const override |
Check whether or not the given MBB can be used as a prologue for the target. More... | |
| int | getFrameIndexReference (const MachineFunction &MF, int FI, unsigned &FrameReg) const override |
| getFrameIndexReference - Provide a base+offset reference to an FI slot for debug info. More... | |
| int | resolveFrameIndexReference (const MachineFunction &MF, int FI, unsigned &FrameReg, bool PreferFP=false) const |
| bool | spillCalleeSavedRegisters (MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, const std::vector< 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(). More... | |
| bool | restoreCalleeSavedRegisters (MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, std::vector< 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(). More... | |
| bool | canUseRedZone (const MachineFunction &MF) const |
| Can this function use the red zone for local allocations. More... | |
| bool | hasFP (const MachineFunction &MF) const override |
| hasFP - Return true if the specified function should have a dedicated frame pointer register. More... | |
| bool | hasReservedCallFrame (const MachineFunction &MF) const override |
| 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. More... | |
| void | determineCalleeSaves (MachineFunction &MF, BitVector &SavedRegs, RegScavenger *RS) const override |
| This method determines which of the registers reported by TargetRegisterInfo::getCalleeSavedRegs() should actually get saved. More... | |
| bool | enableShrinkWrapping (const MachineFunction &MF) const override |
| Returns true if the target will correctly handle shrink wrapping. More... | |
| bool | enableStackSlotScavenging (const MachineFunction &MF) const override |
| 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. More... | |
| void | processFunctionBeforeFrameFinalized (MachineFunction &MF, RegScavenger *RS) const override |
| processFunctionBeforeFrameFinalized - This method is called immediately before the specified function's frame layout (MF.getFrameInfo()) is finalized. More... | |
| unsigned | getWinEHParentFrameOffset (const MachineFunction &MF) const override |
| The parent frame offset (aka dispFrame) is only used on X86_64 to retrieve the parent's frame pointer. More... | |
| unsigned | getWinEHFuncletFrameSize (const MachineFunction &MF) const |
| Funclets only need to account for space for the callee saved registers, as the locals are accounted for in the parent's stack frame. More... | |
| int | getFrameIndexReferencePreferSP (const MachineFunction &MF, int FI, unsigned &FrameReg, bool IgnoreSPUpdates) const override |
| For Win64 AArch64 EH, the offset to the Unwind object is from the SP before the update. More... | |
 Public Member Functions inherited from llvm::TargetFrameLowering | |
| TargetFrameLowering (StackDirection D, unsigned StackAl, int LAO, unsigned TransAl=1, bool StackReal=true) | |
| virtual | ~TargetFrameLowering () |
| StackDirection | getStackGrowthDirection () const |
| getStackGrowthDirection - Return the direction the stack grows More... | |
| unsigned | getStackAlignment () const |
| getStackAlignment - This method returns the number of bytes to which the stack pointer must be aligned on entry to a function. More... | |
| int | alignSPAdjust (int SPAdj) const |
| alignSPAdjust - This method aligns the stack adjustment to the correct alignment. More... | |
| unsigned | getTransientStackAlignment () const |
| getTransientStackAlignment - This method returns the number of bytes to which the stack pointer must be aligned at all times, even between calls. More... | |
| bool | isStackRealignable () const |
| isStackRealignable - This method returns whether the stack can be realigned. More... | |
| virtual unsigned | getStackAlignmentSkew (const MachineFunction &MF) const |
| Return the skew that has to be applied to stack alignment under certain conditions (e.g. More... | |
| int | getOffsetOfLocalArea () const |
| getOffsetOfLocalArea - This method returns the offset of the local area from the stack pointer on entrance to a function. More... | |
| virtual bool | isFPCloseToIncomingSP () const |
| isFPCloseToIncomingSP - Return true if the frame pointer is close to the incoming stack pointer, false if it is close to the post-prologue stack pointer. More... | |
| virtual bool | assignCalleeSavedSpillSlots (MachineFunction &MF, const TargetRegisterInfo *TRI, std::vector< CalleeSavedInfo > &CSI) const |
| assignCalleeSavedSpillSlots - Allows target to override spill slot assignment logic. More... | |
| virtual const SpillSlot * | getCalleeSavedSpillSlots (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. More... | |
| virtual bool | targetHandlesStackFrameRounding () const |
| targetHandlesStackFrameRounding - Returns true if the target is responsible for rounding up the stack frame (probably at emitPrologue time). More... | |
| virtual bool | enableCalleeSaveSkip (const MachineFunction &MF) const |
| Returns true if the target can safely skip saving callee-saved registers for noreturn nounwind functions. More... | |
| virtual void | inlineStackProbe (MachineFunction &MF, MachineBasicBlock &PrologueMBB) const |
| Replace a StackProbe stub (if any) with the actual probe code inline. More... | |
| virtual void | adjustForSegmentedStacks (MachineFunction &MF, MachineBasicBlock &PrologueMBB) const |
| Adjust the prologue to have the function use segmented stacks. More... | |
| 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. More... | |
| 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". More... | |
| 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. More... | |
| virtual bool | needsFrameIndexResolution (const MachineFunction &MF) const |
| virtual void | orderFrameObjects (const MachineFunction &MF, SmallVectorImpl< int > &objectsToAllocate) const |
| Order the symbols in the local stack frame. More... | |
| virtual bool | canUseAsEpilogue (const MachineBasicBlock &MBB) const |
Check whether or not the given MBB can be used as a epilogue for the target. More... | |
| virtual int | getInitialCFAOffset (const MachineFunction &MF) const |
| Return initial CFA offset value i.e. More... | |
| virtual unsigned | getInitialCFARegister (const MachineFunction &MF) const |
| Return initial CFA register value i.e. More... | |
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. More... | |
Detailed Description
Definition at line 21 of file AArch64FrameLowering.h.
Constructor & Destructor Documentation
◆ AArch64FrameLowering()
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inlineexplicit |
Definition at line 23 of file AArch64FrameLowering.h.
References canUseAsPrologue(), canUseRedZone(), determineCalleeSaves(), eliminateCallFramePseudoInstr(), emitCalleeSavedFrameMoves(), emitEpilogue(), emitPrologue(), getFrameIndexReference(), hasFP(), hasReservedCallFrame(), I, MI, resolveFrameIndexReference(), restoreCalleeSavedRegisters(), spillCalleeSavedRegisters(), and TRI.
Member Function Documentation
◆ canUseAsPrologue()
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overridevirtual |
Check whether or not the given MBB can be used as a prologue for the target.
The prologue will be inserted first in this basic 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 prologue.
Reimplemented from llvm::TargetFrameLowering.
Definition at line 386 of file AArch64FrameLowering.cpp.
References findScratchNonCalleeSaveRegister(), llvm::MachineBasicBlock::getParent(), llvm::AArch64Subtarget::getRegisterInfo(), and llvm::MachineFunction::getSubtarget().
Referenced by AArch64FrameLowering().
◆ canUseRedZone()
| bool AArch64FrameLowering::canUseRedZone | ( | const MachineFunction & | MF | ) | const |
Can this function use the red zone for local allocations.
Definition at line 187 of file AArch64FrameLowering.cpp.
References EnableRedZone, llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::AArch64FunctionInfo::getLocalStackSize(), llvm::MachineFrameInfo::hasCalls(), llvm::Function::hasFnAttribute(), hasFP(), and llvm::Attribute::NoRedZone.
Referenced by AArch64FrameLowering(), emitEpilogue(), emitPrologue(), resolveFrameIndexReference(), and windowsRequiresStackProbe().
◆ determineCalleeSaves()
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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.
Reimplemented from llvm::TargetFrameLowering.
Definition at line 1956 of file AArch64FrameLowering.cpp.
References llvm::RegScavenger::addScavengingFrameIndex(), llvm::AMDGPU::HSAMD::Kernel::Arg::Key::Align, llvm::alignTo(), llvm::AArch64RegisterInfo::cannotEliminateFrame(), contains(), llvm::BitVector::count(), llvm::MachineFrameInfo::CreateStackObject(), llvm::dbgs(), llvm::TargetFrameLowering::determineCalleeSaves(), estimateRSStackSizeLimit(), llvm::MachineFrameInfo::estimateStackSize(), llvm::AArch64RegisterInfo::getBaseRegister(), llvm::MachineRegisterInfo::getCalleeSavedRegs(), llvm::Function::getCallingConv(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::MachineFunction::getRegInfo(), llvm::TargetSubtargetInfo::getRegisterInfo(), llvm::TargetRegisterInfo::getRegSizeInBits(), llvm::TargetRegisterInfo::getSpillAlignment(), llvm::TargetRegisterInfo::getSpillSize(), llvm::MachineFunction::getSubtarget(), llvm::CallingConv::GHC, llvm::AArch64RegisterInfo::hasBasePointer(), hasFP(), llvm::MachineRegisterInfo::isPhysRegUsed(), llvm::AArch64RegisterInfo::isReservedReg(), LLVM_DEBUG, MRI, llvm::printReg(), produceCompactUnwindFrame(), Reg, llvm::BitVector::set(), llvm::BitVector::set_bits(), llvm::AArch64FunctionInfo::setCalleeSavedStackSize(), llvm::AArch64FunctionInfo::setCalleeSaveStackHasFreeSpace(), llvm::AArch64FunctionInfo::setHasStackFrame(), Size, llvm::BitVector::test(), TRI, and windowsRequiresStackProbe().
Referenced by AArch64FrameLowering().
◆ eliminateCallFramePseudoInstr()
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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 248 of file AArch64FrameLowering.cpp.
References llvm::AMDGPU::HSAMD::Kernel::Arg::Key::Align, llvm::alignTo(), assert(), llvm::emitFrameOffset(), llvm::MachineBasicBlock::erase(), llvm::TargetSubtargetInfo::getFrameLowering(), llvm::TargetSubtargetInfo::getInstrInfo(), llvm::TargetFrameLowering::getStackAlignment(), llvm::MachineFunction::getSubtarget(), llvm::TargetFrameLowering::hasReservedCallFrame(), and TII.
Referenced by AArch64FrameLowering().
◆ emitCalleeSavedFrameMoves()
| void AArch64FrameLowering::emitCalleeSavedFrameMoves | ( | MachineBasicBlock & | MBB, |
| MachineBasicBlock::iterator | MBBI | ||
| ) | const |
Definition at line 319 of file AArch64FrameLowering.cpp.
References llvm::MachineFunction::addFrameInst(), llvm::BuildMI(), llvm::MCCFIInstruction::createOffset(), llvm::MachineBasicBlock::findDebugLoc(), llvm::MachineInstr::FrameSetup, llvm::MCInstrInfo::get(), llvm::MachineFrameInfo::getCalleeSavedInfo(), llvm::MCRegisterInfo::getDwarfRegNum(), llvm::MachineFunction::getFrameInfo(), llvm::TargetSubtargetInfo::getInstrInfo(), llvm::MachineFrameInfo::getObjectOffset(), llvm::TargetFrameLowering::getOffsetOfLocalArea(), llvm::MachineBasicBlock::getParent(), llvm::TargetSubtargetInfo::getRegisterInfo(), llvm::MachineFunction::getSubtarget(), Info, MRI, Reg, llvm::MachineInstrBuilder::setMIFlags(), and TII.
Referenced by AArch64FrameLowering().
◆ emitEpilogue()
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overridevirtual |
Implements llvm::TargetFrameLowering.
Definition at line 1229 of file AArch64FrameLowering.cpp.
References adaptForLdStOpt(), llvm::alignTo(), assert(), llvm::MachineBasicBlock::begin(), llvm::BuildMI(), canUseRedZone(), convertCalleeSaveRestoreToSPPrePostIncDec(), llvm::emitFrameOffset(), llvm::MachineBasicBlock::end(), fixupCalleeSaveRestoreStackOffset(), llvm::MachineInstr::FrameDestroy, llvm::MDNode::get(), llvm::AArch64FunctionInfo::getArgumentStackToRestore(), llvm::AArch64FunctionInfo::getCalleeSavedStackSize(), llvm::Function::getCallingConv(), llvm::MachineBasicBlock::getFirstTerminator(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getFunction(), llvm::MachineOperand::getImm(), llvm::MachineFunction::getInfo(), llvm::AArch64Subtarget::getInstrInfo(), llvm::MachineBasicBlock::getLastNonDebugInstr(), llvm::AArch64FunctionInfo::getLocalStackSize(), llvm::MachineFrameInfo::getStackSize(), llvm::MachineFunction::getSubtarget(), llvm::AArch64FunctionInfo::getVarArgsGPRSize(), getWinEHFuncletFrameSize(), llvm::CallingConv::GHC, llvm::MachineFunction::hasEHFunclets(), hasFP(), llvm::MachineFrameInfo::hasVarSizedObjects(), InsertReturnAddressAuth(), llvm::AArch64Subtarget::isCallingConvWin64(), isFuncletReturnInstr(), llvm::AArch64InstrInfo::isSEHInstruction(), llvm::AArch64FunctionInfo::isStackRealigned(), llvm::make_scope_exit(), needsWinCFI(), llvm::AArch64FunctionInfo::setLocalStackSize(), and TII.
Referenced by AArch64FrameLowering().
◆ emitPrologue()
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overridevirtual |
emitProlog/emitEpilog - These methods insert prolog and epilog code into the function.
Implements llvm::TargetFrameLowering.
Definition at line 796 of file AArch64FrameLowering.cpp.
References llvm::MachineFunction::addFrameInst(), llvm::alignTo(), assert(), llvm::MachineBasicBlock::begin(), llvm::BuildMI(), canUseRedZone(), convertCalleeSaveRestoreToSPPrePostIncDec(), llvm::MCCFIInstruction::createDefCfaOffset(), llvm::MCCFIInstruction::createNegateRAState(), llvm::MCContext::createTempSymbol(), llvm::emitFrameOffset(), F(), llvm::MachineInstr::FrameSetup, llvm::MCInstrInfo::get(), llvm::AArch64FunctionInfo::getCalleeSavedStackSize(), llvm::Function::getCallingConv(), llvm::MachineModuleInfo::getContext(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::AArch64Subtarget::getInstrInfo(), llvm::TargetMachine::getMCAsmInfo(), llvm::MachineFunction::getMMI(), llvm::AArch64Subtarget::getRegisterInfo(), llvm::MachineFrameInfo::getStackSize(), llvm::MachineFunction::getSubtarget(), llvm::MachineFunction::getTarget(), llvm::AArch64FunctionInfo::getVarArgsGPRSize(), getWinEHFuncletFrameSize(), llvm::CallingConv::GHC, llvm::MachineModuleInfo::hasDebugInfo(), hasFP(), llvm::AArch64FunctionInfo::hasStackFrame(), llvm::AArch64Subtarget::isCallingConvWin64(), llvm::MachineBasicBlock::isEHFuncletEntry(), llvm::Function::needsUnwindTableEntry(), needsWinCFI(), llvm::AArch64FunctionInfo::setHasRedZone(), llvm::MachineFunction::setHasWinCFI(), llvm::AArch64FunctionInfo::setLocalStackSize(), llvm::MachineInstrBuilder::setMIFlags(), ShouldSignReturnAddress(), ShouldSignWithAKey(), TII, llvm::MCAsmInfo::usesWindowsCFI(), and windowsRequiresStackProbe().
Referenced by AArch64FrameLowering().
◆ enableShrinkWrapping()
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inlineoverridevirtual |
Returns true if the target will correctly handle shrink wrapping.
Reimplemented from llvm::TargetFrameLowering.
Definition at line 66 of file AArch64FrameLowering.h.
References enableStackSlotScavenging(), getFrameIndexReferencePreferSP(), getWinEHFuncletFrameSize(), getWinEHParentFrameOffset(), and processFunctionBeforeFrameFinalized().
◆ enableStackSlotScavenging()
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overridevirtual |
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 from llvm::TargetFrameLowering.
Definition at line 2090 of file AArch64FrameLowering.cpp.
References llvm::MachineFunction::getInfo(), and llvm::AArch64FunctionInfo::hasCalleeSaveStackFreeSpace().
Referenced by enableShrinkWrapping().
◆ getFrameIndexReference()
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overridevirtual |
getFrameIndexReference - Provide a base+offset reference to an FI slot for debug info.
It's the same as what we use for resolving the code-gen references for now. FIXME: This can go wrong when references are SP-relative and simple call frames aren't used.
Reimplemented from llvm::TargetFrameLowering.
Definition at line 1454 of file AArch64FrameLowering.cpp.
References resolveFrameIndexReference().
Referenced by AArch64FrameLowering().
◆ getFrameIndexReferencePreferSP()
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overridevirtual |
For Win64 AArch64 EH, the offset to the Unwind object is from the SP before the update.
This is easily retrieved as it is exactly the offset that is set in processFunctionBeforeFrameFinalized.
Reimplemented from llvm::TargetFrameLowering.
Definition at line 2132 of file AArch64FrameLowering.cpp.
References llvm::dbgs(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFrameInfo::getObjectOffset(), and LLVM_DEBUG.
Referenced by enableShrinkWrapping().
◆ getWinEHFuncletFrameSize()
| unsigned AArch64FrameLowering::getWinEHFuncletFrameSize | ( | const MachineFunction & | MF | ) | const |
Funclets only need to account for space for the callee saved registers, as the locals are accounted for in the parent's stack frame.
Definition at line 2151 of file AArch64FrameLowering.cpp.
References llvm::alignTo(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getInfo(), llvm::MachineFrameInfo::getMaxCallFrameSize(), and llvm::TargetFrameLowering::getStackAlignment().
Referenced by emitEpilogue(), emitPrologue(), and enableShrinkWrapping().
◆ getWinEHParentFrameOffset()
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overridevirtual |
The parent frame offset (aka dispFrame) is only used on X86_64 to retrieve the parent's frame pointer.
Reimplemented from llvm::TargetFrameLowering.
Definition at line 2144 of file AArch64FrameLowering.cpp.
Referenced by enableShrinkWrapping().
◆ hasFP()
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overridevirtual |
hasFP - Return true if the specified function should have a dedicated frame pointer register.
Implements llvm::TargetFrameLowering.
Definition at line 204 of file AArch64FrameLowering.cpp.
References DefaultSafeSPDisplacement, llvm::TargetOptions::DisableFramePointerElim(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFrameInfo::getMaxCallFrameSize(), llvm::TargetSubtargetInfo::getRegisterInfo(), llvm::MachineFunction::getSubtarget(), llvm::MachineFunction::getTarget(), llvm::MachineFrameInfo::hasCalls(), llvm::MachineFunction::hasEHFunclets(), llvm::MachineFunction::hasLocalEscape(), llvm::MachineFrameInfo::hasPatchPoint(), llvm::MachineFrameInfo::hasStackMap(), llvm::MachineFrameInfo::hasVarSizedObjects(), llvm::MachineFrameInfo::isFrameAddressTaken(), llvm::MachineFrameInfo::isMaxCallFrameSizeComputed(), llvm::TargetRegisterInfo::needsStackRealignment(), and llvm::TargetMachine::Options.
Referenced by AArch64FrameLowering(), canUseRedZone(), determineCalleeSaves(), emitEpilogue(), emitPrologue(), llvm::AArch64RegisterInfo::getFrameRegister(), llvm::AArch64RegisterInfo::getRegPressureLimit(), llvm::AArch64RegisterInfo::getReservedRegs(), llvm::AArch64RegisterInfo::needsFrameBaseReg(), resolveFrameIndexReference(), and llvm::AArch64RegisterInfo::useFPForScavengingIndex().
◆ hasReservedCallFrame()
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overridevirtual |
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 from llvm::TargetFrameLowering.
Definition at line 244 of file AArch64FrameLowering.cpp.
References llvm::MachineFunction::getFrameInfo(), and llvm::MachineFrameInfo::hasVarSizedObjects().
Referenced by AArch64FrameLowering().
◆ processFunctionBeforeFrameFinalized()
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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 2096 of file AArch64FrameLowering.cpp.
References llvm::MachineInstrBuilder::addImm(), assert(), llvm::RegScavenger::backward(), llvm::MachineBasicBlock::begin(), llvm::BuildMI(), llvm::MachineFrameInfo::CreateStackObject(), llvm::MachineBasicBlock::end(), llvm::RegScavenger::enterBasicBlockEnd(), llvm::RegScavenger::FindUnusedReg(), llvm::MachineInstr::FrameSetup, llvm::MachineFunction::front(), llvm::MCInstrInfo::get(), llvm::MachineFunction::getFrameInfo(), llvm::TargetSubtargetInfo::getInstrInfo(), llvm::getKillRegState(), llvm::MachineFunction::getSubtarget(), llvm::MachineFunction::getWinEHFuncInfo(), llvm::MachineFunction::hasEHFunclets(), TII, and llvm::WinEHFuncInfo::UnwindHelpFrameIdx.
Referenced by enableShrinkWrapping().
◆ resolveFrameIndexReference()
| int AArch64FrameLowering::resolveFrameIndexReference | ( | const MachineFunction & | MF, |
| int | FI, | ||
| unsigned & | FrameReg, | ||
| bool | PreferFP = false |
||
| ) | const |
Definition at line 1460 of file AArch64FrameLowering.cpp.
References llvm::alignTo(), assert(), canUseRedZone(), llvm::AArch64RegisterInfo::getBaseRegister(), llvm::AArch64FunctionInfo::getCalleeSavedStackSize(), llvm::Function::getCallingConv(), llvm::MachineFunction::getFrameInfo(), llvm::AArch64RegisterInfo::getFrameRegister(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::AArch64FunctionInfo::getLocalStackSize(), llvm::MachineFrameInfo::getObjectOffset(), llvm::TargetSubtargetInfo::getRegisterInfo(), llvm::MachineFrameInfo::getStackSize(), llvm::MachineFunction::getSubtarget(), llvm::AArch64FunctionInfo::getVarArgsGPRSize(), llvm::AArch64RegisterInfo::hasBasePointer(), llvm::MachineFunction::hasEHFunclets(), hasFP(), llvm::AArch64FunctionInfo::hasStackFrame(), llvm::MachineFrameInfo::hasVarSizedObjects(), llvm::AArch64Subtarget::isCallingConvWin64(), and llvm::MachineFrameInfo::isFixedObjectIndex().
Referenced by AArch64FrameLowering(), llvm::AArch64RegisterInfo::eliminateFrameIndex(), and getFrameIndexReference().
◆ restoreCalleeSavedRegisters()
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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 1855 of file AArch64FrameLowering.cpp.
References llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addMemOperand(), llvm::MachineInstrBuilder::addReg(), llvm::AMDGPU::HSAMD::Kernel::Arg::Key::Align, llvm::BuildMI(), computeCalleeSaveRegisterPairs(), llvm::dbgs(), llvm::RegState::Define, llvm::MachineBasicBlock::end(), llvm::MachineInstr::FrameDestroy, llvm::MCInstrInfo::get(), llvm::getDefRegState(), llvm::MachinePointerInfo::getFixedStack(), llvm::TargetSubtargetInfo::getInstrInfo(), llvm::MachineFunction::getMachineMemOperand(), llvm::MachineBasicBlock::getParent(), llvm::MachineFunction::getSubtarget(), llvm::GPR, InsertSEH(), LLVM_DEBUG, llvm::MachineMemOperand::MOLoad, needsWinCFI(), llvm::printReg(), llvm::reverse(), ReverseCSRRestoreSeq, llvm::NVPTX::PTXCvtMode::RPI, llvm::MachineInstrBuilder::setMIFlag(), Size, std::swap(), and TII.
Referenced by AArch64FrameLowering().
◆ spillCalleeSavedRegisters()
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overridevirtual |
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 from llvm::TargetFrameLowering.
Definition at line 1728 of file AArch64FrameLowering.cpp.
References llvm::MachineFunction::addFrameInst(), llvm::MachineInstrBuilder::addImm(), llvm::MachineBasicBlock::addLiveIn(), llvm::MachineInstrBuilder::addMemOperand(), llvm::MachineInstrBuilder::addReg(), llvm::AMDGPU::HSAMD::Kernel::Arg::Key::Align, assert(), llvm::BuildMI(), computeCalleeSaveRegisterPairs(), llvm::MCCFIInstruction::createEscape(), llvm::dbgs(), llvm::RegState::Define, llvm::MachineInstr::FrameSetup, llvm::MCInstrInfo::get(), llvm::MachinePointerInfo::getFixedStack(), llvm::MachineFunction::getFunction(), llvm::TargetSubtargetInfo::getInstrInfo(), llvm::MachineFunction::getMachineMemOperand(), llvm::MachineBasicBlock::getParent(), getPrologueDeath(), llvm::MachineFunction::getRegInfo(), llvm::MachineFunction::getSubtarget(), llvm::GPR, llvm::Function::hasFnAttribute(), InsertSEH(), llvm::MachineRegisterInfo::isReserved(), LLVM_DEBUG, llvm::MachineMemOperand::MOStore, MRI, needsWinCFI(), llvm::Attribute::NoUnwind, llvm::printReg(), llvm::SmallVectorTemplateCommon< T >::rbegin(), llvm::SmallVectorTemplateCommon< T >::rend(), llvm::NVPTX::PTXCvtMode::RPI, llvm::MachineInstrBuilder::setMIFlag(), Size, std::swap(), and TII.
Referenced by AArch64FrameLowering().
The documentation for this class was generated from the following files:
- lib/Target/AArch64/AArch64FrameLowering.h
- lib/Target/AArch64/AArch64FrameLowering.cpp
