mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-21 18:29:45 +00:00
77c1b73211
This handles the simplest case for mov -> push conversion: 1. x86-32 calling convention, everything is passed through the stack. 2. There is no reserved call frame. 3. Only registers or immediates are pushed, no attempt to combine a mem-reg-mem sequence into a single PUSHmm. Differential Revision: http://reviews.llvm.org/D6503 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@223757 91177308-0d34-0410-b5e6-96231b3b80d8
94 lines
3.7 KiB
C++
94 lines
3.7 KiB
C++
//===-- X86TargetFrameLowering.h - Define frame lowering for X86 -*- C++ -*-==//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This class implements X86-specific bits of TargetFrameLowering class.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_LIB_TARGET_X86_X86FRAMELOWERING_H
|
|
#define LLVM_LIB_TARGET_X86_X86FRAMELOWERING_H
|
|
|
|
#include "llvm/Target/TargetFrameLowering.h"
|
|
|
|
namespace llvm {
|
|
|
|
class MCSymbol;
|
|
class X86TargetMachine;
|
|
class X86Subtarget;
|
|
|
|
class X86FrameLowering : public TargetFrameLowering {
|
|
public:
|
|
explicit X86FrameLowering(StackDirection D, unsigned StackAl, int LAO)
|
|
: TargetFrameLowering(StackGrowsDown, StackAl, LAO) {}
|
|
|
|
static void getStackProbeFunction(const X86Subtarget &STI,
|
|
unsigned &CallOp,
|
|
const char *&Symbol);
|
|
|
|
void emitCalleeSavedFrameMoves(MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator MBBI,
|
|
DebugLoc DL) const;
|
|
|
|
/// emitProlog/emitEpilog - These methods insert prolog and epilog code into
|
|
/// the function.
|
|
void emitPrologue(MachineFunction &MF) const override;
|
|
void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
|
|
|
|
void adjustForSegmentedStacks(MachineFunction &MF) const override;
|
|
|
|
void adjustForHiPEPrologue(MachineFunction &MF) const override;
|
|
|
|
void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
|
|
RegScavenger *RS = nullptr) const override;
|
|
|
|
bool
|
|
assignCalleeSavedSpillSlots(MachineFunction &MF,
|
|
const TargetRegisterInfo *TRI,
|
|
std::vector<CalleeSavedInfo> &CSI) const override;
|
|
|
|
bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator MI,
|
|
const std::vector<CalleeSavedInfo> &CSI,
|
|
const TargetRegisterInfo *TRI) const override;
|
|
|
|
bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator MI,
|
|
const std::vector<CalleeSavedInfo> &CSI,
|
|
const TargetRegisterInfo *TRI) const override;
|
|
|
|
bool hasFP(const MachineFunction &MF) const override;
|
|
bool hasReservedCallFrame(const MachineFunction &MF) const override;
|
|
|
|
int getFrameIndexOffset(const MachineFunction &MF, int FI) const override;
|
|
int getFrameIndexReference(const MachineFunction &MF, int FI,
|
|
unsigned &FrameReg) const override;
|
|
|
|
int getFrameIndexOffsetFromSP(const MachineFunction &MF, int FI) const;
|
|
int getFrameIndexReferenceFromSP(const MachineFunction &MF, int FI,
|
|
unsigned &FrameReg) const override;
|
|
|
|
void eliminateCallFramePseudoInstr(MachineFunction &MF,
|
|
MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator MI) const override;
|
|
|
|
private:
|
|
/// convertArgMovsToPushes - This method tries to convert a call sequence
|
|
/// that uses sub and mov instructions to put the argument onto the stack
|
|
/// into a series of pushes.
|
|
/// Returns true if the transformation succeeded, false if not.
|
|
bool convertArgMovsToPushes(MachineFunction &MF,
|
|
MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator I,
|
|
uint64_t Amount) const;
|
|
};
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|