namespace llvm {
+class X86Subtarget;
+class X86RegisterInfo;
+
class X86FrameLowering : public TargetFrameLowering {
public:
- explicit X86FrameLowering(StackDirection D, unsigned StackAl, int LAO)
- : TargetFrameLowering(StackGrowsDown, StackAl, LAO) {}
+ X86FrameLowering(const X86Subtarget &STI, unsigned StackAlignOverride);
+
+ // Cached subtarget predicates.
+
+ const X86Subtarget &STI;
+ const TargetInstrInfo &TII;
+ const X86RegisterInfo *RegInfo;
+
+ unsigned SlotSize;
+
+ /// Is64Bit implies that x86_64 instructions are available.
+ bool Is64Bit;
+
+ bool IsLP64;
+
+ /// True if the 64-bit frame or stack pointer should be used. True for most
+ /// 64-bit targets with the exception of x32. If this is false, 32-bit
+ /// instruction operands should be used to manipulate StackPtr and FramePtr.
+ bool Uses64BitFramePtr;
/// Emit a call to the target's stack probe function. This is required for all
/// large stack allocations on Windows. The caller is required to materialize
/// the number of bytes to probe in RAX/EAX.
- static void emitStackProbeCall(MachineFunction &MF, MachineBasicBlock &MBB,
- MachineBasicBlock::iterator MBBI, DebugLoc DL);
+ void emitStackProbeCall(MachineFunction &MF, MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator MBBI, DebugLoc DL) const;
void emitCalleeSavedFrameMoves(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MBBI,
/// it is an ADD/SUB/LEA instruction it is deleted argument and the
/// stack adjustment is returned as a positive value for ADD/LEA and
/// a negative for SUB.
- static int mergeSPUpdates(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator &MBBI,
- unsigned StackPtr, bool doMergeWithPrevious);
+ int mergeSPUpdates(MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI,
+ unsigned StackPtr, bool doMergeWithPrevious) const;
/// Emit a series of instructions to increment / decrement the stack
/// pointer by a constant value.
- static void emitSPUpdate(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator &MBBI, unsigned StackPtr,
- int64_t NumBytes, bool Is64BitTarget,
- bool Is64BitStackPtr, bool UseLEA,
- const TargetInstrInfo &TII,
- const TargetRegisterInfo &TRI);
+ void emitSPUpdate(MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI,
+ unsigned StackPtr, int64_t NumBytes, bool Is64BitTarget,
+ bool Is64BitStackPtr, bool UseLEA,
+ const TargetInstrInfo &TII,
+ const TargetRegisterInfo &TRI) const;
/// Check that LEA can be used on SP in an epilogue sequence for \p MF.
bool canUseLEAForSPInEpilogue(const MachineFunction &MF) const;
MachineBasicBlock &MBB,
MachineBasicBlock::iterator I,
uint64_t Amount) const;
+
+ uint64_t calculateMaxStackAlign(const MachineFunction &MF) const;
};
} // End llvm namespace