89 lines
3.4 KiB
C++
89 lines
3.4 KiB
C++
//===-- VEFrameLowering.h - Define frame lowering for VE --*- C++ -*-===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This class implements VE-specific bits of TargetFrameLowering class.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_LIB_TARGET_VE_VEFRAMELOWERING_H
|
|
#define LLVM_LIB_TARGET_VE_VEFRAMELOWERING_H
|
|
|
|
#include "VE.h"
|
|
#include "llvm/CodeGen/TargetFrameLowering.h"
|
|
#include "llvm/Support/TypeSize.h"
|
|
|
|
namespace llvm {
|
|
|
|
class VESubtarget;
|
|
class VEFrameLowering : public TargetFrameLowering {
|
|
public:
|
|
explicit VEFrameLowering(const VESubtarget &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;
|
|
void emitPrologueInsns(MachineFunction &MF, MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator MBBI, uint64_t NumBytes,
|
|
bool RequireFPUpdate) const;
|
|
void emitEpilogueInsns(MachineFunction &MF, MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator MBBI, uint64_t NumBytes,
|
|
bool RequireFPUpdate) const;
|
|
|
|
MachineBasicBlock::iterator
|
|
eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator I) const override;
|
|
|
|
bool hasFP(const MachineFunction &MF) const override;
|
|
bool hasBP(const MachineFunction &MF) const;
|
|
bool hasGOT(const MachineFunction &MF) const;
|
|
|
|
// VE reserves argument space always for call sites in the function
|
|
// immediately on entry of the current function.
|
|
bool hasReservedCallFrame(const MachineFunction &MF) const override {
|
|
return true;
|
|
}
|
|
void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
|
|
RegScavenger *RS = nullptr) const override;
|
|
|
|
StackOffset getFrameIndexReference(const MachineFunction &MF, int FI,
|
|
Register &FrameReg) const override;
|
|
|
|
const SpillSlot *
|
|
getCalleeSavedSpillSlots(unsigned &NumEntries) const override {
|
|
static const SpillSlot Offsets[] = {
|
|
{VE::SX17, 40}, {VE::SX18, 48}, {VE::SX19, 56}, {VE::SX20, 64},
|
|
{VE::SX21, 72}, {VE::SX22, 80}, {VE::SX23, 88}, {VE::SX24, 96},
|
|
{VE::SX25, 104}, {VE::SX26, 112}, {VE::SX27, 120}, {VE::SX28, 128},
|
|
{VE::SX29, 136}, {VE::SX30, 144}, {VE::SX31, 152}, {VE::SX32, 160},
|
|
{VE::SX33, 168}};
|
|
NumEntries = array_lengthof(Offsets);
|
|
return Offsets;
|
|
}
|
|
|
|
protected:
|
|
const VESubtarget &STI;
|
|
|
|
private:
|
|
// 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, int64_t NumBytes,
|
|
MaybeAlign MayAlign = MaybeAlign()) const;
|
|
|
|
// Emits code for extending SP in function prologue/epilogue.
|
|
void emitSPExtend(MachineFunction &MF, MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator MBBI) const;
|
|
};
|
|
|
|
} // namespace llvm
|
|
|
|
#endif
|