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
18 #include "llvm/ADT/SmallVector.h"
19 #include "llvm/ADT/VectorExtras.h"
20 #include "llvm/CodeGen/MachineFunction.h"
21 #include "llvm/CodeGen/MachineFrameInfo.h"
25 /// MipsFunctionInfo - This class is derived from MachineFunction private
26 /// Mips target-specific information for each MachineFunction.
27 class MipsFunctionInfo : public MachineFunctionInfo {
30 /// At each function entry, two special bitmask directives must be emitted
31 /// to help debugging, for CPU and FPU callee saved registers. Both need
32 /// the negative offset from the final stack size and its higher registers
33 /// location on the stack.
34 int CPUTopSavedRegOff;
35 int FPUTopSavedRegOff;
37 /// SRetReturnReg - Some subtargets require that sret lowering includes
38 /// returning the value of the returned struct in a register. This field
39 /// holds the virtual register into which the sret argument is passed.
40 unsigned SRetReturnReg;
42 /// GlobalBaseReg - keeps track of the virtual register initialized for
43 /// use as the global base register. This is used for PIC in some PIC
44 /// relocation models.
45 unsigned GlobalBaseReg;
47 /// VarArgsFrameIndex - FrameIndex for start of varargs area.
48 int VarArgsFrameIndex;
50 // Range of frame object indices.
51 // InArgFIRange: Range of indices of all frame objects created during call to
52 // LowerFormalArguments.
53 // OutArgFIRange: Range of indices of all frame objects created during call to
54 // LowerCall except for the frame object for restoring $gp.
55 std::pair<int, int> InArgFIRange, OutArgFIRange;
56 int GPFI; // Index of the frame object for restoring $gp
57 bool HasCall; // True if function has a function call.
60 MipsFunctionInfo(MachineFunction& MF)
61 : CPUTopSavedRegOff(0),
62 FPUTopSavedRegOff(0), SRetReturnReg(0), GlobalBaseReg(0),
63 VarArgsFrameIndex(0), InArgFIRange(std::make_pair(-1, 0)),
64 OutArgFIRange(std::make_pair(-1, 0)), GPFI(0), HasCall(false),
68 int getCPUTopSavedRegOff() const { return CPUTopSavedRegOff; }
69 void setCPUTopSavedRegOff(int Off) { CPUTopSavedRegOff = Off; }
71 int getFPUTopSavedRegOff() const { return FPUTopSavedRegOff; }
72 void setFPUTopSavedRegOff(int Off) { FPUTopSavedRegOff = Off; }
74 bool isInArgFI(int FI) const {
75 return FI <= InArgFIRange.first && FI >= InArgFIRange.second;
77 void setLastInArgFI(int FI) { InArgFIRange.second = FI; }
79 bool isOutArgFI(int FI) const {
80 return FI <= OutArgFIRange.first && FI >= OutArgFIRange.second;
82 void extendOutArgFIRange(int FirstFI, int LastFI) {
83 if (!OutArgFIRange.second)
84 // this must be the first time this function was called.
85 OutArgFIRange.first = FirstFI;
86 OutArgFIRange.second = LastFI;
89 int getGPFI() const { return GPFI; }
90 void setGPFI(int FI) { GPFI = FI; }
91 bool needGPSaveRestore() const { return getGPFI(); }
92 bool isGPFI(int FI) const { return GPFI && GPFI == FI; }
94 unsigned getSRetReturnReg() const { return SRetReturnReg; }
95 void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; }
97 unsigned getGlobalBaseReg() const { return GlobalBaseReg; }
98 void setGlobalBaseReg(unsigned Reg) { GlobalBaseReg = Reg; }
100 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
101 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
103 bool hasCall() const { return HasCall; }
104 void setHasCall() { HasCall = true; }
106 int getMaxCallFrameSize() const { return MaxCallFrameSize; }
107 void setMaxCallFrameSize(int S) { MaxCallFrameSize = S; }
110 } // end of namespace llvm
112 #endif // MIPS_MACHINE_FUNCTION_INFO_H