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//===-- SparcFrameLowering.h - Define frame lowering for Sparc --*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_SPARC_SPARCFRAMELOWERING_H
#define LLVM_LIB_TARGET_SPARC_SPARCFRAMELOWERING_H
#include "Sparc.h"
#include "llvm/CodeGen/TargetFrameLowering.h"
namespace llvm {
class SparcSubtarget;
class SparcFrameLowering : public TargetFrameLowering {
public:
explicit SparcFrameLowering(const SparcSubtarget &ST);
/// emitProlog/emitEpilog - These methods insert prolog and epilog code into
/// the function.
void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
MachineBasicBlock::iterator
eliminateCallFramePseudoInstr(MachineFunction &MF,
MachineBasicBlock &MBB,
MachineBasicBlock::iterator I) const override;
bool hasReservedCallFrame(const MachineFunction &MF) const override;
bool hasFP(const MachineFunction &MF) const override;
void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
RegScavenger *RS = nullptr) const override;
int getFrameIndexReference(const MachineFunction &MF, int FI,
unsigned &FrameReg) const override;
/// targetHandlesStackFrameRounding - Returns true if the target is
/// responsible for rounding up the stack frame (probably at emitPrologue
/// time).
bool targetHandlesStackFrameRounding() const override { return true; }
private:
// Remap input registers to output registers for leaf procedure.
void remapRegsForLeafProc(MachineFunction &MF) const;
// Returns true if MF is a leaf procedure.
bool isLeafProc(MachineFunction &MF) const;
// Emits code for adjusting SP in function prologue/epilogue.
void emitSPAdjustment(MachineFunction &MF,
MachineBasicBlock &MBB,
MachineBasicBlock::iterator MBBI,
int NumBytes, unsigned ADDrr, unsigned ADDri) const;
};
} // End llvm namespace
#endif
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