mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-10-31 08:16:47 +00:00
00e08fcaa0
Add header guards to files that were missing guards. Remove #endif comments as they don't seem common in LLVM (we can easily add them back if we decide they're useful) Changes made by clang-tidy with minor tweaks. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215558 91177308-0d34-0410-b5e6-96231b3b80d8
127 lines
4.7 KiB
C++
127 lines
4.7 KiB
C++
//===-- PPCFrameLowering.h - Define frame lowering for PowerPC --*- 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_POWERPC_PPCFRAMELOWERING_H
|
|
#define LLVM_LIB_TARGET_POWERPC_PPCFRAMELOWERING_H
|
|
|
|
#include "PPC.h"
|
|
#include "llvm/ADT/STLExtras.h"
|
|
#include "llvm/Target/TargetFrameLowering.h"
|
|
#include "llvm/Target/TargetMachine.h"
|
|
|
|
namespace llvm {
|
|
class PPCSubtarget;
|
|
|
|
class PPCFrameLowering: public TargetFrameLowering {
|
|
const PPCSubtarget &Subtarget;
|
|
|
|
public:
|
|
PPCFrameLowering(const PPCSubtarget &STI);
|
|
|
|
unsigned determineFrameLayout(MachineFunction &MF,
|
|
bool UpdateMF = true,
|
|
bool UseEstimate = false) 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;
|
|
|
|
bool hasFP(const MachineFunction &MF) const override;
|
|
bool needsFP(const MachineFunction &MF) const;
|
|
void replaceFPWithRealFP(MachineFunction &MF) const;
|
|
|
|
void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
|
|
RegScavenger *RS = nullptr) const override;
|
|
void processFunctionBeforeFrameFinalized(MachineFunction &MF,
|
|
RegScavenger *RS = nullptr) const override;
|
|
void addScavengingSpillSlot(MachineFunction &MF, RegScavenger *RS) const;
|
|
|
|
bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator MI,
|
|
const std::vector<CalleeSavedInfo> &CSI,
|
|
const TargetRegisterInfo *TRI) const override;
|
|
|
|
void eliminateCallFramePseudoInstr(MachineFunction &MF,
|
|
MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator I) const override;
|
|
|
|
bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator MI,
|
|
const std::vector<CalleeSavedInfo> &CSI,
|
|
const TargetRegisterInfo *TRI) 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; }
|
|
|
|
/// getReturnSaveOffset - Return the previous frame offset to save the
|
|
/// return address.
|
|
static unsigned getReturnSaveOffset(bool isPPC64, bool isDarwinABI) {
|
|
if (isDarwinABI)
|
|
return isPPC64 ? 16 : 8;
|
|
// SVR4 ABI:
|
|
return isPPC64 ? 16 : 4;
|
|
}
|
|
|
|
/// getTOCSaveOffset - Return the previous frame offset to save the
|
|
/// TOC register -- 64-bit SVR4 ABI only.
|
|
static unsigned getTOCSaveOffset(bool isELFv2ABI) {
|
|
return isELFv2ABI ? 24 : 40;
|
|
}
|
|
|
|
/// getFramePointerSaveOffset - Return the previous frame offset to save the
|
|
/// frame pointer.
|
|
static unsigned getFramePointerSaveOffset(bool isPPC64, bool isDarwinABI) {
|
|
// For the Darwin ABI:
|
|
// We cannot use the TOC save slot (offset +20) in the PowerPC linkage area
|
|
// for saving the frame pointer (if needed.) While the published ABI has
|
|
// not used this slot since at least MacOSX 10.2, there is older code
|
|
// around that does use it, and that needs to continue to work.
|
|
if (isDarwinABI)
|
|
return isPPC64 ? -8U : -4U;
|
|
|
|
// SVR4 ABI: First slot in the general register save area.
|
|
return isPPC64 ? -8U : -4U;
|
|
}
|
|
|
|
/// getBasePointerSaveOffset - Return the previous frame offset to save the
|
|
/// base pointer.
|
|
static unsigned getBasePointerSaveOffset(bool isPPC64,
|
|
bool isDarwinABI,
|
|
bool isPIC) {
|
|
if (isDarwinABI)
|
|
return isPPC64 ? -16U : -8U;
|
|
|
|
// SVR4 ABI: First slot in the general register save area.
|
|
return isPPC64 ? -16U : isPIC ? -12U : -8U;
|
|
}
|
|
|
|
/// getLinkageSize - Return the size of the PowerPC ABI linkage area.
|
|
///
|
|
static unsigned getLinkageSize(bool isPPC64, bool isDarwinABI,
|
|
bool isELFv2ABI) {
|
|
if (isDarwinABI || isPPC64)
|
|
return (isELFv2ABI ? 4 : 6) * (isPPC64 ? 8 : 4);
|
|
|
|
// SVR4 ABI:
|
|
return 8;
|
|
}
|
|
|
|
const SpillSlot *
|
|
getCalleeSavedSpillSlots(unsigned &NumEntries) const override;
|
|
};
|
|
} // End llvm namespace
|
|
|
|
#endif
|