1 //===- ARCFrameLowering.h - Define frame lowering for ARC -------*- 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 class implements the ARC specific frame lowering. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_LIB_TARGET_ARC_ARCFRAMELOWERING_H 15 #define LLVM_LIB_TARGET_ARC_ARCFRAMELOWERING_H 16 17 #include "ARC.h" 18 #include "llvm/CodeGen/MachineBasicBlock.h" 19 #include "llvm/CodeGen/MachineFrameInfo.h" 20 #include "llvm/CodeGen/TargetFrameLowering.h" 21 22 namespace llvm { 23 24 class MachineFunction; 25 class ARCSubtarget; 26 class ARCInstrInfo; 27 28 class ARCFrameLowering : public TargetFrameLowering { 29 public: 30 ARCFrameLowering(const ARCSubtarget &st) 31 : TargetFrameLowering(TargetFrameLowering::StackGrowsDown, 4, 0), ST(st) { 32 } 33 34 /// Insert Prologue into the function. 35 void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override; 36 37 /// Insert Epilogue into the function. 38 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override; 39 40 /// Add explicit callee save registers. 41 void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs, 42 RegScavenger *RS) const override; 43 44 bool spillCalleeSavedRegisters(MachineBasicBlock &MBB, 45 MachineBasicBlock::iterator MI, 46 const std::vector<CalleeSavedInfo> &CSI, 47 const TargetRegisterInfo *TRI) const override; 48 49 bool 50 restoreCalleeSavedRegisters(MachineBasicBlock &MBB, 51 MachineBasicBlock::iterator MI, 52 std::vector<CalleeSavedInfo> &CSI, 53 const TargetRegisterInfo *TRI) const override; 54 55 void processFunctionBeforeFrameFinalized(MachineFunction &MF, 56 RegScavenger *RS) const override; 57 58 bool hasFP(const MachineFunction &MF) const override; 59 60 MachineBasicBlock::iterator 61 eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB, 62 MachineBasicBlock::iterator I) const override; 63 64 bool assignCalleeSavedSpillSlots( 65 llvm::MachineFunction &, const llvm::TargetRegisterInfo *, 66 std::vector<llvm::CalleeSavedInfo> &) const override; 67 68 private: 69 void adjustStackToMatchRecords(MachineBasicBlock &MBB, 70 MachineBasicBlock::iterator MI, 71 bool allocate) const; 72 73 const ARCSubtarget &ST; 74 }; 75 76 } // end namespace llvm 77 78 #endif // LLVM_LIB_TARGET_ARC_ARCFRAMELOWERING_H 79
