1 //===--------------------- SIFrameLowering.h --------------------*- 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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef LLVM_LIB_TARGET_AMDGPU_SIFRAMELOWERING_H 10 #define LLVM_LIB_TARGET_AMDGPU_SIFRAMELOWERING_H 11 12 #include "AMDGPUFrameLowering.h" 13 14 namespace llvm { 15 16 class SIInstrInfo; 17 class SIMachineFunctionInfo; 18 class SIRegisterInfo; 19 class GCNSubtarget; 20 21 class SIFrameLowering final : public AMDGPUFrameLowering { 22 public: 23 SIFrameLowering(StackDirection D, Align StackAl, int LAO, 24 Align TransAl = Align(1)) 25 : AMDGPUFrameLowering(D, StackAl, LAO, TransAl) {} 26 ~SIFrameLowering() override = default; 27 28 void emitEntryFunctionPrologue(MachineFunction &MF, 29 MachineBasicBlock &MBB) const; 30 void emitPrologue(MachineFunction &MF, 31 MachineBasicBlock &MBB) const override; 32 void emitEpilogue(MachineFunction &MF, 33 MachineBasicBlock &MBB) const override; 34 StackOffset getFrameIndexReference(const MachineFunction &MF, int FI, 35 Register &FrameReg) const override; 36 37 void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs, 38 RegScavenger *RS = nullptr) const override; 39 void determineCalleeSavesSGPR(MachineFunction &MF, BitVector &SavedRegs, 40 RegScavenger *RS = nullptr) const; 41 bool 42 assignCalleeSavedSpillSlots(MachineFunction &MF, 43 const TargetRegisterInfo *TRI, 44 std::vector<CalleeSavedInfo> &CSI) const override; 45 46 bool isSupportedStackID(TargetStackID::Value ID) const override; 47 48 void processFunctionBeforeFrameFinalized( 49 MachineFunction &MF, 50 RegScavenger *RS = nullptr) const override; 51 52 MachineBasicBlock::iterator 53 eliminateCallFramePseudoInstr(MachineFunction &MF, 54 MachineBasicBlock &MBB, 55 MachineBasicBlock::iterator MI) const override; 56 57 private: 58 void emitEntryFunctionFlatScratchInit(MachineFunction &MF, 59 MachineBasicBlock &MBB, 60 MachineBasicBlock::iterator I, 61 const DebugLoc &DL, 62 Register ScratchWaveOffsetReg) const; 63 64 Register getEntryFunctionReservedScratchRsrcReg(MachineFunction &MF) const; 65 66 void emitEntryFunctionScratchRsrcRegSetup( 67 MachineFunction &MF, MachineBasicBlock &MBB, 68 MachineBasicBlock::iterator I, const DebugLoc &DL, 69 Register PreloadedPrivateBufferReg, Register ScratchRsrcReg, 70 Register ScratchWaveOffsetReg) const; 71 72 public: 73 bool hasFP(const MachineFunction &MF) const override; 74 75 bool requiresStackPointerReference(const MachineFunction &MF) const; 76 }; 77 78 } // end namespace llvm 79 80 #endif // LLVM_LIB_TARGET_AMDGPU_SIFRAMELOWERING_H 81