1480093f4SDimitry Andric //===-- VEFrameLowering.h - Define frame lowering for VE --*- C++ -*-===// 2480093f4SDimitry Andric // 3480093f4SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4480093f4SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5480093f4SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6480093f4SDimitry Andric // 7480093f4SDimitry Andric //===----------------------------------------------------------------------===// 8480093f4SDimitry Andric // 9480093f4SDimitry Andric // This class implements VE-specific bits of TargetFrameLowering class. 10480093f4SDimitry Andric // 11480093f4SDimitry Andric //===----------------------------------------------------------------------===// 12480093f4SDimitry Andric 13480093f4SDimitry Andric #ifndef LLVM_LIB_TARGET_VE_VEFRAMELOWERING_H 14480093f4SDimitry Andric #define LLVM_LIB_TARGET_VE_VEFRAMELOWERING_H 15480093f4SDimitry Andric 16480093f4SDimitry Andric #include "VE.h" 17480093f4SDimitry Andric #include "llvm/CodeGen/TargetFrameLowering.h" 18480093f4SDimitry Andric 19480093f4SDimitry Andric namespace llvm { 20480093f4SDimitry Andric 21480093f4SDimitry Andric class VESubtarget; 22480093f4SDimitry Andric class VEFrameLowering : public TargetFrameLowering { 23480093f4SDimitry Andric public: 24480093f4SDimitry Andric explicit VEFrameLowering(const VESubtarget &ST); 25480093f4SDimitry Andric 26480093f4SDimitry Andric /// emitProlog/emitEpilog - These methods insert prolog and epilog code into 27480093f4SDimitry Andric /// the function. 28480093f4SDimitry Andric void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override; 29480093f4SDimitry Andric void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override; 30480093f4SDimitry Andric void emitPrologueInsns(MachineFunction &MF, MachineBasicBlock &MBB, 31*5ffd83dbSDimitry Andric MachineBasicBlock::iterator MBBI, uint64_t NumBytes, 32480093f4SDimitry Andric bool RequireFPUpdate) const; 33480093f4SDimitry Andric void emitEpilogueInsns(MachineFunction &MF, MachineBasicBlock &MBB, 34*5ffd83dbSDimitry Andric MachineBasicBlock::iterator MBBI, uint64_t NumBytes, 35480093f4SDimitry Andric bool RequireFPUpdate) const; 36480093f4SDimitry Andric 37480093f4SDimitry Andric MachineBasicBlock::iterator 38480093f4SDimitry Andric eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB, 39480093f4SDimitry Andric MachineBasicBlock::iterator I) const override; 40480093f4SDimitry Andric 41*5ffd83dbSDimitry Andric bool hasBP(const MachineFunction &MF) const; 42480093f4SDimitry Andric bool hasFP(const MachineFunction &MF) const override; 43*5ffd83dbSDimitry Andric // VE reserves argument space always for call sites in the function 44*5ffd83dbSDimitry Andric // immediately on entry of the current function. 45*5ffd83dbSDimitry Andric bool hasReservedCallFrame(const MachineFunction &MF) const override { 46*5ffd83dbSDimitry Andric return true; 47*5ffd83dbSDimitry Andric } 48480093f4SDimitry Andric void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs, 49480093f4SDimitry Andric RegScavenger *RS = nullptr) const override; 50480093f4SDimitry Andric 51480093f4SDimitry Andric int getFrameIndexReference(const MachineFunction &MF, int FI, 52*5ffd83dbSDimitry Andric Register &FrameReg) const override; 53480093f4SDimitry Andric 54480093f4SDimitry Andric const SpillSlot * 55480093f4SDimitry Andric getCalleeSavedSpillSlots(unsigned &NumEntries) const override { 56480093f4SDimitry Andric static const SpillSlot Offsets[] = { 57480093f4SDimitry Andric {VE::SX17, 40}, {VE::SX18, 48}, {VE::SX19, 56}, {VE::SX20, 64}, 58480093f4SDimitry Andric {VE::SX21, 72}, {VE::SX22, 80}, {VE::SX23, 88}, {VE::SX24, 96}, 59480093f4SDimitry Andric {VE::SX25, 104}, {VE::SX26, 112}, {VE::SX27, 120}, {VE::SX28, 128}, 60480093f4SDimitry Andric {VE::SX29, 136}, {VE::SX30, 144}, {VE::SX31, 152}, {VE::SX32, 160}, 61480093f4SDimitry Andric {VE::SX33, 168}}; 62480093f4SDimitry Andric NumEntries = array_lengthof(Offsets); 63480093f4SDimitry Andric return Offsets; 64480093f4SDimitry Andric } 65480093f4SDimitry Andric 66*5ffd83dbSDimitry Andric protected: 67*5ffd83dbSDimitry Andric const VESubtarget &STI; 68480093f4SDimitry Andric 69480093f4SDimitry Andric private: 70480093f4SDimitry Andric // Returns true if MF is a leaf procedure. 71480093f4SDimitry Andric bool isLeafProc(MachineFunction &MF) const; 72480093f4SDimitry Andric 73480093f4SDimitry Andric // Emits code for adjusting SP in function prologue/epilogue. 74480093f4SDimitry Andric void emitSPAdjustment(MachineFunction &MF, MachineBasicBlock &MBB, 75*5ffd83dbSDimitry Andric MachineBasicBlock::iterator MBBI, int64_t NumBytes, 76*5ffd83dbSDimitry Andric MaybeAlign MayAlign = MaybeAlign()) const; 77480093f4SDimitry Andric 78480093f4SDimitry Andric // Emits code for extending SP in function prologue/epilogue. 79480093f4SDimitry Andric void emitSPExtend(MachineFunction &MF, MachineBasicBlock &MBB, 80*5ffd83dbSDimitry Andric MachineBasicBlock::iterator MBBI) const; 81480093f4SDimitry Andric }; 82480093f4SDimitry Andric 83480093f4SDimitry Andric } // namespace llvm 84480093f4SDimitry Andric 85480093f4SDimitry Andric #endif 86