1 //===-- MipsMachineFunctionInfo.h - Private data used for Mips ----*- C++ -*-=//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file declares the Mips specific subclass of MachineFunctionInfo.
12 //===----------------------------------------------------------------------===//
14 #ifndef MIPS_MACHINE_FUNCTION_INFO_H
15 #define MIPS_MACHINE_FUNCTION_INFO_H
17 #include "llvm/CodeGen/MachineFunction.h"
18 #include "llvm/CodeGen/MachineFrameInfo.h"
23 /// MipsFunctionInfo - This class is derived from MachineFunction private
24 /// Mips target-specific information for each MachineFunction.
25 class MipsFunctionInfo : public MachineFunctionInfo {
26 virtual void anchor();
29 /// SRetReturnReg - Some subtargets require that sret lowering includes
30 /// returning the value of the returned struct in a register. This field
31 /// holds the virtual register into which the sret argument is passed.
32 unsigned SRetReturnReg;
34 /// GlobalBaseReg - keeps track of the virtual register initialized for
35 /// use as the global base register. This is used for PIC in some PIC
36 /// relocation models.
37 unsigned GlobalBaseReg;
39 /// VarArgsFrameIndex - FrameIndex for start of varargs area.
40 int VarArgsFrameIndex;
42 // Range of frame object indices.
43 // InArgFIRange: Range of indices of all frame objects created during call to
44 // LowerFormalArguments.
45 // OutArgFIRange: Range of indices of all frame objects created during call to
46 // LowerCall except for the frame object for restoring $gp.
47 std::pair<int, int> InArgFIRange, OutArgFIRange;
48 mutable int DynAllocFI; // Frame index of dynamically allocated stack area.
49 unsigned MaxCallFrameSize;
54 MipsFunctionInfo(MachineFunction& MF)
55 : MF(MF), SRetReturnReg(0), GlobalBaseReg(0),
56 VarArgsFrameIndex(0), InArgFIRange(std::make_pair(-1, 0)),
57 OutArgFIRange(std::make_pair(-1, 0)), DynAllocFI(0),
58 MaxCallFrameSize(0), EmitNOAT(false)
61 bool isInArgFI(int FI) const {
62 return FI <= InArgFIRange.first && FI >= InArgFIRange.second;
64 void setLastInArgFI(int FI) { InArgFIRange.second = FI; }
66 bool isOutArgFI(int FI) const {
67 return FI <= OutArgFIRange.first && FI >= OutArgFIRange.second;
69 void extendOutArgFIRange(int FirstFI, int LastFI) {
70 if (!OutArgFIRange.second)
71 // this must be the first time this function was called.
72 OutArgFIRange.first = FirstFI;
73 OutArgFIRange.second = LastFI;
76 // The first call to this function creates a frame object for dynamically
77 // allocated stack area.
78 int getDynAllocFI() const {
80 DynAllocFI = MF.getFrameInfo()->CreateFixedObject(4, 0, true);
84 bool isDynAllocFI(int FI) const { return DynAllocFI && DynAllocFI == FI; }
86 unsigned getSRetReturnReg() const { return SRetReturnReg; }
87 void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; }
89 bool globalBaseRegSet() const;
90 unsigned getGlobalBaseReg();
92 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
93 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
95 unsigned getMaxCallFrameSize() const { return MaxCallFrameSize; }
96 void setMaxCallFrameSize(unsigned S) { MaxCallFrameSize = S; }
98 bool getEmitNOAT() const { return EmitNOAT; }
99 void setEmitNOAT() { EmitNOAT = true; }
102 } // end of namespace llvm
104 #endif // MIPS_MACHINE_FUNCTION_INFO_H