14 #ifndef LLVM_LIB_TARGET_X86_X86FRAMELOWERING_H
15 #define LLVM_LIB_TARGET_X86_X86FRAMELOWERING_H
21 class MachineInstrBuilder;
22 class MCCFIInstruction;
24 class X86RegisterInfo;
82 std::vector<CalleeSavedInfo> &CSI)
const override;
86 const std::vector<CalleeSavedInfo> &CSI,
91 const std::vector<CalleeSavedInfo> &CSI,
100 unsigned &FrameReg)
const override;
104 bool IgnoreSPUpdates)
const override;
120 bool doMergeWithPrevious)
const;
125 int64_t NumBytes,
bool InEpilogue)
const;
164 uint64_t Amount)
const;
175 const DebugLoc &DL,
bool RestoreSP =
false)
const;
183 bool InProlog)
const;
188 const DebugLoc &DL,
bool InProlog)
const;
193 const DebugLoc &DL,
bool InProlog)
const;
198 unsigned Reg, uint64_t MaxAlign)
const;
209 bool InEpilogue)
const;
MachineBasicBlock::iterator restoreWin32EHStackPointers(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, const DebugLoc &DL, bool RestoreSP=false) const
Sets up EBP and optionally ESI based on the incoming EBP value.
bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, const std::vector< CalleeSavedInfo > &CSI, const TargetRegisterInfo *TRI) const override
restoreCalleeSavedRegisters - Issues instruction(s) to restore all callee saved registers and returns...
bool convertArgMovsToPushes(MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator I, uint64_t Amount) const
convertArgMovsToPushes - This method tries to convert a call sequence that uses sub and mov instructi...
X86FrameLowering(const X86Subtarget &STI, unsigned StackAlignOverride)
bool Uses64BitFramePtr
True if the 64-bit frame or stack pointer should be used.
Reg
All possible values of the reg field in the ModR/M byte.
void BuildCFI(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, const DebugLoc &DL, const MCCFIInstruction &CFIInst) const
Wraps up getting a CFI index and building a MachineInstr for it.
void adjustForHiPEPrologue(MachineFunction &MF, MachineBasicBlock &PrologueMBB) const override
Erlang programs may need a special prologue to handle the stack size they might need at runtime...
void processFunctionBeforeFrameFinalized(MachineFunction &MF, RegScavenger *RS) const override
processFunctionBeforeFrameFinalized - This method is called immediately before the specified function...
unsigned getWinEHParentFrameOffset(const MachineFunction &MF) const override
bool hasFP(const MachineFunction &MF) const override
hasFP - Return true if the specified function should have a dedicated frame pointer register...
bool needsFrameIndexResolution(const MachineFunction &MF) const override
MachineBasicBlock::iterator eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator MI) const override
This method is called during prolog/epilog code insertion to eliminate call frame setup and destroy p...
void inlineStackProbe(MachineFunction &MF, MachineBasicBlock &PrologMBB) const override
Replace a StackProbe inline-stub with the actual probe code inline.
bool Is64Bit
Is64Bit implies that x86_64 instructions are available.
TargetInstrInfo - Interface to description of machine instruction set.
bool canUseAsPrologue(const MachineBasicBlock &MBB) const override
Check whether or not the given MBB can be used as a prologue for the target.
void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs, RegScavenger *RS=nullptr) const override
This method determines which of the registers reported by TargetRegisterInfo::getCalleeSavedRegs() sh...
void emitCalleeSavedFrameMoves(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, const DebugLoc &DL) const
bool canUseAsEpilogue(const MachineBasicBlock &MBB) const override
Check whether or not the given MBB can be used as a epilogue for the target.
int mergeSPUpdates(MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI, bool doMergeWithPrevious) const
Check the instruction before/after the passed instruction.
bool enableShrinkWrapping(const MachineFunction &MF) const override
Returns true if the target will correctly handle shrink wrapping.
TargetRegisterInfo base class - We assume that the target defines a static array of TargetRegisterDes...
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.
void emitStackProbe(MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, const DebugLoc &DL, bool InProlog) const
Emit target stack probe code.
Information about stack frame layout on the target.
int getFrameIndexReferencePreferSP(const MachineFunction &MF, int FI, unsigned &FrameReg, bool IgnoreSPUpdates) const override
Same as getFrameIndexReference, except that the stack pointer (as opposed to the frame pointer) will ...
bool canSimplifyCallFramePseudos(const MachineFunction &MF) const override
canSimplifyCallFramePseudos - If there is a reserved call frame, the call frame pseudos can be simpli...
const TargetInstrInfo & TII
void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override
void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override
emitProlog/emitEpilog - These methods insert prolog and epilog code into the function.
bool canUseLEAForSPInEpilogue(const MachineFunction &MF) const
Check that LEA can be used on SP in an epilogue sequence for MF.
bool assignCalleeSavedSpillSlots(MachineFunction &MF, const TargetRegisterInfo *TRI, std::vector< CalleeSavedInfo > &CSI) const override
assignCalleeSavedSpillSlots - Allows target to override spill slot assignment logic.
void adjustForSegmentedStacks(MachineFunction &MF, MachineBasicBlock &PrologueMBB) const override
Adjust the prologue to have the function use segmented stacks.
const X86RegisterInfo * TRI
void emitSPUpdate(MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI, int64_t NumBytes, bool InEpilogue) const
Emit a series of instructions to increment / decrement the stack pointer by a constant value...
int getFrameIndexReference(const MachineFunction &MF, int FI, unsigned &FrameReg) const override
getFrameIndexReference - This method should return the base register and offset used to reference a f...
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 tru...
void orderFrameObjects(const MachineFunction &MF, SmallVectorImpl< int > &ObjectsToAllocate) const override
Order the symbols in the local stack.