MipsMachineFunction.h revision e06ce4c2c48351d6d74ac2f81e72e17e5ec9fdc7
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/MachineFunction.h" 19#include "llvm/CodeGen/MachineFrameInfo.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 /// VarArgsFrameIndex - FrameIndex for start of varargs area. 43 int VarArgsFrameIndex; 44 45 // Range of frame object indices. 46 // InArgFIRange: Range of indices of all frame objects created during call to 47 // LowerFormalArguments. 48 std::pair<int, int> InArgFIRange; 49 50 bool EmitNOAT; 51 52public: 53 MipsFunctionInfo(MachineFunction& MF) 54 : MF(MF), SRetReturnReg(0), GlobalBaseReg(0), 55 VarArgsFrameIndex(0), InArgFIRange(std::make_pair(-1, 0)), EmitNOAT(false) 56 {} 57 58 bool isInArgFI(int FI) const { 59 return FI <= InArgFIRange.first && FI >= InArgFIRange.second; 60 } 61 void setLastInArgFI(int FI) { InArgFIRange.second = FI; } 62 63 unsigned getSRetReturnReg() const { return SRetReturnReg; } 64 void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; } 65 66 bool globalBaseRegSet() const; 67 unsigned getGlobalBaseReg(); 68 69 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; } 70 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; } 71 72 bool getEmitNOAT() const { return EmitNOAT; } 73 void setEmitNOAT() { EmitNOAT = true; } 74}; 75 76} // end of namespace llvm 77 78#endif // MIPS_MACHINE_FUNCTION_INFO_H 79