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1//===-- VEFrameLowering.h - Define frame lowering for VE --*- C++ -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This class implements VE-specific bits of TargetFrameLowering class.10//11//===----------------------------------------------------------------------===//12 13#ifndef LLVM_LIB_TARGET_VE_VEFRAMELOWERING_H14#define LLVM_LIB_TARGET_VE_VEFRAMELOWERING_H15 16#include "VE.h"17#include "llvm/CodeGen/TargetFrameLowering.h"18#include "llvm/Support/TypeSize.h"19 20namespace llvm {21 22class VESubtarget;23class VEFrameLowering : public TargetFrameLowering {24public:25 explicit VEFrameLowering(const VESubtarget &ST);26 27 /// emitProlog/emitEpilog - These methods insert prolog and epilog code into28 /// the function.29 void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;30 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;31 void emitPrologueInsns(MachineFunction &MF, MachineBasicBlock &MBB,32 MachineBasicBlock::iterator MBBI, uint64_t NumBytes,33 bool RequireFPUpdate) const;34 void emitEpilogueInsns(MachineFunction &MF, MachineBasicBlock &MBB,35 MachineBasicBlock::iterator MBBI, uint64_t NumBytes,36 bool RequireFPUpdate) const;37 38 MachineBasicBlock::iterator39 eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,40 MachineBasicBlock::iterator I) const override;41 42 bool hasBP(const MachineFunction &MF) const;43 bool hasGOT(const MachineFunction &MF) const;44 45 // VE reserves argument space always for call sites in the function46 // immediately on entry of the current function.47 bool hasReservedCallFrame(const MachineFunction &MF) const override {48 return true;49 }50 void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,51 RegScavenger *RS = nullptr) const override;52 53 StackOffset getFrameIndexReference(const MachineFunction &MF, int FI,54 Register &FrameReg) const override;55 56 const SpillSlot *57 getCalleeSavedSpillSlots(unsigned &NumEntries) const override {58 static const SpillSlot Offsets[] = {59 {VE::SX17, 40}, {VE::SX18, 48}, {VE::SX19, 56}, {VE::SX20, 64},60 {VE::SX21, 72}, {VE::SX22, 80}, {VE::SX23, 88}, {VE::SX24, 96},61 {VE::SX25, 104}, {VE::SX26, 112}, {VE::SX27, 120}, {VE::SX28, 128},62 {VE::SX29, 136}, {VE::SX30, 144}, {VE::SX31, 152}, {VE::SX32, 160},63 {VE::SX33, 168}};64 NumEntries = std::size(Offsets);65 return Offsets;66 }67 68protected:69 const VESubtarget &STI;70 71 bool hasFPImpl(const MachineFunction &MF) const override;72 73private:74 // Returns true if MF is a leaf procedure.75 bool isLeafProc(MachineFunction &MF) const;76 77 // Emits code for adjusting SP in function prologue/epilogue.78 void emitSPAdjustment(MachineFunction &MF, MachineBasicBlock &MBB,79 MachineBasicBlock::iterator MBBI, int64_t NumBytes,80 MaybeAlign MayAlign = MaybeAlign()) const;81 82 // Emits code for extending SP in function prologue/epilogue.83 void emitSPExtend(MachineFunction &MF, MachineBasicBlock &MBB,84 MachineBasicBlock::iterator MBBI) const;85};86 87} // namespace llvm88 89#endif90