| //===-- 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 = std::size(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 |