MipsMachineFunction.h revision a1514e24cc24b050f53a12650e047799358833a1
1//===-- MipsMachineFunctionInfo.h - Private data used for Mips ----*- 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 declares the Mips specific subclass of MachineFunctionInfo. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef MIPS_MACHINE_FUNCTION_INFO_H 15#define MIPS_MACHINE_FUNCTION_INFO_H 16 17#include "MipsSubtarget.h" 18#include "llvm/CodeGen/MachineFrameInfo.h" 19#include "llvm/CodeGen/MachineFunction.h" 20#include "llvm/Target/TargetFrameLowering.h" 21#include "llvm/Target/TargetMachine.h" 22#include <utility> 23 24namespace llvm { 25 26/// MipsFunctionInfo - This class is derived from MachineFunction private 27/// Mips target-specific information for each MachineFunction. 28class MipsFunctionInfo : public MachineFunctionInfo { 29 virtual void anchor(); 30 31 MachineFunction& MF; 32 /// SRetReturnReg - Some subtargets require that sret lowering includes 33 /// returning the value of the returned struct in a register. This field 34 /// holds the virtual register into which the sret argument is passed. 35 unsigned SRetReturnReg; 36 37 /// GlobalBaseReg - keeps track of the virtual register initialized for 38 /// use as the global base register. This is used for PIC in some PIC 39 /// relocation models. 40 unsigned GlobalBaseReg; 41 42 /// Mips16SPAliasReg - keeps track of the virtual register initialized for 43 /// use as an alias for SP for use in load/store of halfword/byte from/to 44 /// the stack 45 unsigned Mips16SPAliasReg; 46 47 /// VarArgsFrameIndex - FrameIndex for start of varargs area. 48 int VarArgsFrameIndex; 49 50 /// True if function has a byval argument. 51 bool HasByvalArg; 52 53 /// Size of incoming argument area. 54 unsigned IncomingArgSize; 55 56public: 57 MipsFunctionInfo(MachineFunction& MF) 58 : MF(MF), SRetReturnReg(0), GlobalBaseReg(0), Mips16SPAliasReg(0), 59 VarArgsFrameIndex(0) 60 {} 61 62 unsigned getSRetReturnReg() const { return SRetReturnReg; } 63 void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; } 64 65 bool globalBaseRegSet() const; 66 unsigned getGlobalBaseReg(); 67 68 bool mips16SPAliasRegSet() const; 69 unsigned getMips16SPAliasReg(); 70 71 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; } 72 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; } 73 74 bool hasByvalArg() const { return HasByvalArg; } 75 void setFormalArgInfo(unsigned Size, bool HasByval) { 76 IncomingArgSize = Size; 77 HasByvalArg = HasByval; 78 } 79 80 unsigned getIncomingArgSize() const { return IncomingArgSize; } 81}; 82 83} // end of namespace llvm 84 85#endif // MIPS_MACHINE_FUNCTION_INFO_H 86