LLVM: llvm::PPCFrameLowering Class Reference (original) (raw)
#include "[Target/PowerPC/PPCFrameLowering.h](PPCFrameLowering%5F8h%5Fsource.html)"
| 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 | 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 SpillSlot * | getCalleeSavedSpillSlots (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. | |
| void | updateCalleeSaves (const MachineFunction &MF, BitVector &SavedRegs) const |
| 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. | |
| 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 | 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 | 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 (const MachineFunction &MF) const |
| Returns true if we may need to fix the unwind information for the function. | |
| virtual bool | enableFullCFIFixup (const MachineFunction &MF) const |
| enableFullCFIFixup - Returns true if we may need to fix the unwind information such that it is accurate for every instruction in the function (e.g. | |
| virtual void | resetCFIToInitialState (MachineBasicBlock &MBB) const |
| Emit CFI instructions that recreate the state of the unwind information upon function entry. | |
| 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. | |
| void | spillCalleeSavedRegister (MachineBasicBlock &SaveBlock, MachineBasicBlock::iterator MI, const CalleeSavedInfo &CS, const TargetInstrInfo *TII, const TargetRegisterInfo *TRI) const |
| spillCalleeSavedRegister - Default implementation for spilling a single callee saved register. | |
| void | restoreCalleeSavedRegister (MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, const CalleeSavedInfo &CS, const TargetInstrInfo *TII, const TargetRegisterInfo *TRI) const |
| bool | hasFP (const MachineFunction &MF) const |
| 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 StackOffset | getFrameIndexReferenceFromSP (const MachineFunction &MF, int FI) const |
| getFrameIndexReferenceFromSP - This method returns the offset from the stack pointer to the slot of the specified index. | |
| virtual void | getCalleeSaves (const MachineFunction &MF, BitVector &SavedRegs) const |
| Returns the callee-saved registers as computed by determineCalleeSaves in the BitVector SavedRegs. | |
| 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 void | orderFrameObjects (const MachineFunction &MF, SmallVectorImpl< int > &objectsToAllocate) const |
| Order the symbols in the local stack frame. | |
| 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. | |
| virtual void | spillFPBP (MachineFunction &MF) const |
| If frame pointer or base pointer is clobbered by an instruction, we should spill/restore it around that instruction. | |
| virtual void | emitRemarks (const MachineFunction &MF, MachineOptimizationRemarkEmitter *ORE) const |
| This method is called at the end of prolog/epilog code insertion, so targets can emit remarks based on the final frame layout. |
| 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. |
Definition at line 22 of file PPCFrameLowering.h.
◆ addScavengingSpillSlot()
Definition at line 2287 of file PPCFrameLowering.cpp.
References llvm::MachineFrameInfo::CreateSpillStackObject(), determineFrameLayout(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFrameInfo::getMaxAlign(), llvm::TargetFrameLowering::getStackAlign(), hasNonRISpills(), hasSpills(), llvm::MachineFrameInfo::hasVarSizedObjects(), llvm::isInt(), Size, spillsCR(), and TRI.
Referenced by processFunctionBeforeFrameFinalized().
◆ assignCalleeSavedSpillSlots()
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 2331 of file PPCFrameLowering.cpp.
References contains(), EnablePEVectorSpills, llvm::BitVector::find_first(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getRegInfo(), 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()
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 558 of file PPCFrameLowering.cpp.
References MBB.
◆ 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 from llvm::TargetFrameLowering.
Definition at line 1970 of file PPCFrameLowering.cpp.
References assert(), llvm::MachineFrameInfo::CreateFixedObject(), llvm::TargetFrameLowering::determineCalleeSaves(), llvm::PPCFunctionInfo::getBasePointerSaveIndex(), getBasePointerSaveOffset(), llvm::MachineFunction::getFrameInfo(), llvm::PPCFunctionInfo::getFramePointerSaveIndex(), getFramePointerSaveOffset(), llvm::MachineFunction::getInfo(), llvm::PPCFunctionInfo::getTailCallSPDelta(), llvm::MachineFunction::getTarget(), llvm::TargetOptions::GuaranteedTailCallOpt, MustSaveLR(), needsFP(), llvm::TargetMachine::Options, llvm::BitVector::reset(), llvm::BitVector::set(), llvm::PPCFunctionInfo::setBasePointerSaveIndex(), llvm::PPCFunctionInfo::setCRSpillFrameIndex(), llvm::PPCFunctionInfo::setFramePointerSaveIndex(), llvm::PPCFunctionInfo::setMustSaveLR(), llvm::PPCFunctionInfo::setPICBasePointerSaveIndex(), llvm::BitVector::test(), updateCalleeSaves(), and llvm::PPCFunctionInfo::usesPICBase().
◆ determineFrameLayout()
Determine the frame layout but do not update the machine function.
determineFrameLayout - Determine the size of the frame and maximum call frame size.
The MachineFunction object can be const in this case as it is not modified.
Definition at line 297 of file PPCFrameLowering.cpp.
References llvm::MachineFrameInfo::adjustsStack(), llvm::alignTo(), llvm::MachineFrameInfo::estimateStackSize(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), getLinkageSize(), llvm::MachineFrameInfo::getMaxAlign(), llvm::MachineFrameInfo::getMaxCallFrameSize(), llvm::TargetFrameLowering::getStackAlign(), llvm::MachineFrameInfo::getStackSize(), llvm::Function::hasFnAttribute(), llvm::MachineFrameInfo::hasVarSizedObjects(), llvm::MachineFrameInfo::isFrameAddressTaken(), MustSaveLR(), and llvm::PPCFunctionInfo::mustSaveTOC().
Referenced by addScavengingSpillSlot(), determineFrameLayoutAndUpdate(), and llvm::PPCRegisterInfo::needsFrameBaseReg().
◆ determineFrameLayoutAndUpdate()
◆ 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 from llvm::TargetFrameLowering.
Definition at line 2563 of file PPCFrameLowering.cpp.
References llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), llvm::MachineFunction::getTarget(), llvm::TargetOptions::GuaranteedTailCallOpt, I, is64Bit(), llvm::isInt(), llvm::RegState::Kill, MBB, MBBI, llvm::TargetMachine::Options, and TII.
◆ emitEpilogue()
Implements llvm::TargetFrameLowering.
Definition at line 1542 of file PPCFrameLowering.cpp.
References llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), assert(), llvm::BuildMI(), llvm::SmallVectorTemplateCommon< T, typename >::empty(), llvm::MachineFunction::exposesReturnsTwice(), llvm::CallingConv::Fast, FPReg, llvm::PPCFunctionInfo::getBasePointerSaveIndex(), llvm::MachineFrameInfo::getCalleeSavedInfo(), llvm::Function::getCallingConv(), llvm::MachineFunction::getFrameInfo(), llvm::PPCFunctionInfo::getFramePointerSaveIndex(), llvm::MachineFunction::getFunction(), llvm::MachineOperand::getImm(), llvm::MachineFunction::getInfo(), llvm::getKillRegState(), llvm::PPCFunctionInfo::getMinReservedArea(), llvm::PPCFunctionInfo::getMustSaveCRs(), llvm::MachineFrameInfo::getObjectOffset(), llvm::PPCFunctionInfo::getPICBasePointerSaveIndex(), getReturnSaveOffset(), llvm::PPCFunctionInfo::getROPProtectionHashSaveIndex(), llvm::MachineFrameInfo::getStackSize(), llvm::PPCFunctionInfo::getTailCallSPDelta(), llvm::MachineFunction::getTarget(), llvm::TargetOptions::GuaranteedTailCallOpt, llvm::PPCFunctionInfo::hasFastCall(), llvm::TargetFrameLowering::hasFP(), llvm::MachineFrameInfo::hasVarSizedObjects(), llvm::MachineFrameInfo::isFixedObjectIndex(), llvm::MachineOperand::isImm(), llvm::isInt(), llvm::RegState::Kill, MBB, MBBI, MustSaveLR(), llvm::PPCFunctionInfo::mustSaveLR(), llvm::TargetMachine::Options, llvm::SmallVectorTemplateCommon< T, typename >::size(), SPReg, TII, and llvm::PPCFunctionInfo::usesPICBase().
◆ emitPrologue()
emitProlog/emitEpilog - These methods insert prolog and epilog code into the function.
Implements llvm::TargetFrameLowering.
Definition at line 608 of file PPCFrameLowering.cpp.
References llvm::MachineInstrBuilder::addCFIIndex(), llvm::MachineInstrBuilder::addDef(), llvm::MachineFunction::addFrameInst(), llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), assert(), llvm::BuildMI(), llvm::MCCFIInstruction::cfiDefCfaOffset(), contains(), llvm::MCCFIInstruction::createDefCfaRegister(), llvm::MCCFIInstruction::createOffset(), llvm::MCCFIInstruction::createRegister(), determineFrameLayoutAndUpdate(), llvm::SmallVectorTemplateCommon< T, typename >::empty(), FPReg, llvm::PPCFunctionInfo::getBasePointerSaveIndex(), llvm::MachineFrameInfo::getCalleeSavedInfo(), llvm::MachineFunction::getContext(), llvm::MachineFunction::getFrameInfo(), llvm::PPCFunctionInfo::getFramePointerSaveIndex(), llvm::MachineFunction::getInfo(), llvm::getKillRegState(), llvm::MachineFrameInfo::getMaxAlign(), llvm::PPCFunctionInfo::getMustSaveCRs(), llvm::MachineFrameInfo::getObjectOffset(), llvm::PPCFunctionInfo::getPICBasePointerSaveIndex(), llvm::MCContext::getRegisterInfo(), getReturnSaveOffset(), llvm::PPCFunctionInfo::getROPProtectionHashSaveIndex(), llvm::PPCTargetLowering::getStackProbeSize(), llvm::TargetFrameLowering::hasFP(), llvm::PPCTargetLowering::hasInlineStackProbe(), I, llvm::RegState::ImplicitKill, llvm::MachineFrameInfo::isFixedObjectIndex(), llvm::MachineFrameInfo::isFrameAddressTaken(), llvm::isInt(), llvm::RegState::Kill, llvm_unreachable, llvm::Log2(), MBB, MBBI, MRI, MustSaveLR(), llvm::PPCFunctionInfo::mustSaveLR(), llvm::PPCFunctionInfo::mustSaveTOC(), llvm::MachineFunction::needsFrameMoves(), llvm::Offset, replaceFPWithRealFP(), llvm::MachineFrameInfo::setObjectOffset(), llvm::SmallVectorTemplateCommon< T, typename >::size(), SPReg, TII, and llvm::PPCFunctionInfo::usesPICBase().
◆ enableShrinkWrapping()
◆ getBasePointerSaveOffset()
| uint64_t PPCFrameLowering::getBasePointerSaveOffset | ( | ) | const |
|---|
◆ getCalleeSavedSpillSlots()
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, and CALLEE_SAVED_VRS.
◆ getFramePointerSaveOffset()
| uint64_t PPCFrameLowering::getFramePointerSaveOffset | ( | ) | const |
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◆ getLinkageSize()
| unsigned llvm::PPCFrameLowering::getLinkageSize ( ) const | inline |
|---|
◆ getReturnSaveOffset()
| uint64_t llvm::PPCFrameLowering::getReturnSaveOffset ( ) const | inline |
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◆ getStackThreshold()
| uint64_t PPCFrameLowering::getStackThreshold ( ) const | overridevirtual |
|---|
◆ getTOCSaveOffset()
| uint64_t PPCFrameLowering::getTOCSaveOffset | ( | ) | const |
|---|
◆ hasFPImpl()
◆ inlineStackProbe()
Replace a StackProbe stub (if any) with the actual probe code inline.
Reimplemented from llvm::TargetFrameLowering.
Definition at line 1238 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(), FPReg, llvm::fullyRecomputeLiveIns(), llvm::MachineBasicBlock::getBasicBlock(), llvm::MachineFunction::getContext(), llvm::MachineFunction::getFrameInfo(), llvm::ilist_node_impl< OptionsT >::getIterator(), llvm::MachineFrameInfo::getMaxAlign(), llvm::MCContext::getRegisterInfo(), llvm::PPCTargetLowering::getStackProbeSize(), llvm::MachineFunction::insert(), llvm::isInt(), llvm::isPowerOf2_64(), llvm::RegState::Kill, llvm::Log2(), MBB, MBBI, MI, MRI, llvm::MachineFunction::needsFrameMoves(), llvm::Offset, Opc, llvm::PPC::PRED_GE, llvm::PPC::PRED_LT, llvm::MachineBasicBlock::splice(), SPReg, TII, and llvm::MachineBasicBlock::transferSuccessorsAndUpdatePHIs().
◆ needsFP()
Definition at line 371 of file PPCFrameLowering.cpp.
References llvm::TargetOptions::DisableFramePointerElim(), llvm::MachineFunction::exposesReturnsTwice(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::MachineFunction::getTarget(), llvm::PPCFunctionInfo::hasFastCall(), llvm::Function::hasFnAttribute(), llvm::MachineFrameInfo::hasPatchPoint(), llvm::MachineFrameInfo::hasStackMap(), llvm::MachineFrameInfo::hasVarSizedObjects(), llvm::TargetMachine::Options, and Options.
Referenced by determineCalleeSaves(), hasFPImpl(), processFunctionBeforeFrameFinalized(), replaceFPWithRealFP(), and restoreCalleeSavedRegisters().
◆ 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 from llvm::TargetFrameLowering.
Definition at line 2071 of file PPCFrameLowering.cpp.
References addScavengingSpillSlot(), assert(), contains(), FPReg, llvm::PPCFunctionInfo::getBasePointerSaveIndex(), llvm::MachineFrameInfo::getCalleeSavedInfo(), llvm::MachineFunction::getFrameInfo(), llvm::PPCFunctionInfo::getFramePointerSaveIndex(), llvm::MachineFunction::getInfo(), llvm::MachineFrameInfo::getObjectOffset(), llvm::PPCFunctionInfo::getPICBasePointerSaveIndex(), llvm::MachineFrameInfo::getRestorePoints(), llvm::MachineFrameInfo::getSavePoints(), llvm::PPCFunctionInfo::getTailCallSPDelta(), llvm::MachineFunction::getTarget(), llvm::TargetOptions::GuaranteedTailCallOpt, llvm::MachineFrameInfo::hasTailCall(), I, llvm_unreachable, MBB, llvm::PPCFunctionInfo::mustSaveTOC(), needsFP(), llvm::TargetMachine::Options, llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::MachineFrameInfo::setObjectOffset(), spillsCR(), TRI, and llvm::PPCFunctionInfo::usesPICBase().
◆ replaceFPWithRealFP()
◆ 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 from llvm::TargetFrameLowering.
Definition at line 2606 of file PPCFrameLowering.cpp.
References llvm::MachineInstrBuilder::addReg(), assert(), llvm::BuildMI(), DL, llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::getKillRegState(), llvm::Function::hasFnAttribute(), I, isCalleeSavedCR(), llvm_unreachable, MBB, MI, llvm::PPCFunctionInfo::mustSaveTOC(), needsFP(), Register, restoreCRs(), llvm::BitVector::set(), llvm::ArrayRef< T >::size(), TII, and TRI.
◆ 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 from llvm::TargetFrameLowering.
Definition at line 2411 of file PPCFrameLowering.cpp.
References llvm::addFrameReference(), llvm::PPCFunctionInfo::addMustSaveCR(), llvm::MachineInstrBuilder::addReg(), assert(), llvm::BuildMI(), DL, llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::getKillRegState(), llvm::MachineFunction::getRegInfo(), llvm::Function::hasFnAttribute(), I, llvm::RegState::ImplicitKill, llvm_unreachable, MBB, MI, MRI, llvm::PPCFunctionInfo::mustSaveTOC(), llvm::BitVector::set(), llvm::PPCFunctionInfo::setSpillsCR(), TII, and TRI.
◆ 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 144 of file PPCFrameLowering.h.
◆ updateCalleeSaves()
The documentation for this class was generated from the following files:
- lib/Target/PowerPC/PPCFrameLowering.h
- lib/Target/PowerPC/PPCFrameLowering.cpp