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 /// SRetReturnReg - Some subtargets require that sret lowering includes
31 /// returning the value of the returned struct in a register. This field
32 /// holds the virtual register into which the sret argument is passed.
33 unsigned SRetReturnReg;
35 /// GlobalBaseReg - keeps track of the virtual register initialized for
36 /// use as the global base register. This is used for PIC in some PIC
37 /// relocation models.
38 unsigned GlobalBaseReg;
40 /// VarArgsFrameIndex - FrameIndex for start of varargs area.
41 int VarArgsFrameIndex;
43 // Range of frame object indices.
44 // InArgFIRange: Range of indices of all frame objects created during call to
45 // LowerFormalArguments.
46 // OutArgFIRange: Range of indices of all frame objects created during call to
47 // LowerCall except for the frame object for restoring $gp.
48 std::pair<int, int> InArgFIRange, OutArgFIRange;
49 int GPFI; // Index of the frame object for restoring $gp
50 unsigned MaxCallFrameSize;
52 /// AtomicFrameIndex - To implement atomic.swap and atomic.cmp.swap
53 /// intrinsics, it is necessary to use a temporary stack location.
54 /// This field holds the frame index of this location.
57 MipsFunctionInfo(MachineFunction& MF)
58 : SRetReturnReg(0), GlobalBaseReg(0),
59 VarArgsFrameIndex(0), InArgFIRange(std::make_pair(-1, 0)),
60 OutArgFIRange(std::make_pair(-1, 0)), GPFI(0), MaxCallFrameSize(0),
64 bool isInArgFI(int FI) const {
65 return FI <= InArgFIRange.first && FI >= InArgFIRange.second;
67 void setLastInArgFI(int FI) { InArgFIRange.second = FI; }
69 bool isOutArgFI(int FI) const {
70 return FI <= OutArgFIRange.first && FI >= OutArgFIRange.second;
72 void extendOutArgFIRange(int FirstFI, int LastFI) {
73 if (!OutArgFIRange.second)
74 // this must be the first time this function was called.
75 OutArgFIRange.first = FirstFI;
76 OutArgFIRange.second = LastFI;
79 int getGPFI() const { return GPFI; }
80 void setGPFI(int FI) { GPFI = FI; }
81 bool needGPSaveRestore() const { return getGPFI(); }
82 bool isGPFI(int FI) const { return GPFI && GPFI == FI; }
84 unsigned getSRetReturnReg() const { return SRetReturnReg; }
85 void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; }
87 unsigned getGlobalBaseReg() const { return GlobalBaseReg; }
88 void setGlobalBaseReg(unsigned Reg) { GlobalBaseReg = Reg; }
90 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
91 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
93 unsigned getMaxCallFrameSize() const { return MaxCallFrameSize; }
94 void setMaxCallFrameSize(unsigned S) { MaxCallFrameSize = S; }
96 int getAtomicFrameIndex() const { return AtomicFrameIndex; }
97 void setAtomicFrameIndex(int Index) { AtomicFrameIndex = Index; }
100 } // end of namespace llvm
102 #endif // MIPS_MACHINE_FUNCTION_INFO_H