1 //===-- MipsRegisterInfo.h - Mips Register Information Impl -----*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file contains the Mips implementation of the TargetRegisterInfo class. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_LIB_TARGET_MIPS_MIPSREGISTERINFO_H 15 #define LLVM_LIB_TARGET_MIPS_MIPSREGISTERINFO_H 16 17 #include "Mips.h" 18 #include "llvm/Target/TargetRegisterInfo.h" 19 20 #define GET_REGINFO_HEADER 21 #include "MipsGenRegisterInfo.inc" 22 23 namespace llvm { 24 class MipsRegisterInfo : public MipsGenRegisterInfo { 25 public: 26 enum class MipsPtrClass { 27 /// The default register class for integer values. 28 Default = 0, 29 /// The subset of registers permitted in certain microMIPS instructions 30 /// such as lw16. 31 GPR16MM = 1, 32 /// The stack pointer only. 33 StackPointer = 2, 34 /// The global pointer only. 35 GlobalPointer = 3, 36 }; 37 38 MipsRegisterInfo(); 39 40 /// Get PIC indirect call register 41 static unsigned getPICCallReg(); 42 43 /// Code Generation virtual methods... 44 const TargetRegisterClass *getPointerRegClass(const MachineFunction &MF, 45 unsigned Kind) const override; 46 47 unsigned getRegPressureLimit(const TargetRegisterClass *RC, 48 MachineFunction &MF) const override; 49 const MCPhysReg *getCalleeSavedRegs(const MachineFunction *MF) const override; 50 const uint32_t *getCallPreservedMask(const MachineFunction &MF, 51 CallingConv::ID) const override; 52 static const uint32_t *getMips16RetHelperMask(); 53 54 BitVector getReservedRegs(const MachineFunction &MF) const override; 55 56 bool requiresRegisterScavenging(const MachineFunction &MF) const override; 57 58 bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const override; 59 60 /// Stack Frame Processing Methods 61 void eliminateFrameIndex(MachineBasicBlock::iterator II, 62 int SPAdj, unsigned FIOperandNum, 63 RegScavenger *RS = nullptr) const override; 64 65 // Stack realignment queries. 66 bool canRealignStack(const MachineFunction &MF) const override; 67 68 /// Debug information queries. 69 unsigned getFrameRegister(const MachineFunction &MF) const override; 70 71 /// \brief Return GPR register class. 72 virtual const TargetRegisterClass *intRegClass(unsigned Size) const = 0; 73 74 private: 75 virtual void eliminateFI(MachineBasicBlock::iterator II, unsigned OpNo, 76 int FrameIndex, uint64_t StackSize, 77 int64_t SPOffset) const = 0; 78 }; 79 80 } // end namespace llvm 81 82 #endif 83