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 LLVM_LIB_TARGET_MIPS_MIPSMACHINEFUNCTION_H
15 #define LLVM_LIB_TARGET_MIPS_MIPSMACHINEFUNCTION_H
17 #include "Mips16HardFloatInfo.h"
18 #include "llvm/ADT/StringMap.h"
19 #include "llvm/CodeGen/MachineFrameInfo.h"
20 #include "llvm/CodeGen/MachineFunction.h"
21 #include "llvm/CodeGen/MachineMemOperand.h"
22 #include "llvm/CodeGen/PseudoSourceValue.h"
23 #include "llvm/IR/GlobalValue.h"
24 #include "llvm/IR/ValueMap.h"
25 #include "llvm/Target/TargetFrameLowering.h"
26 #include "llvm/Target/TargetMachine.h"
33 /// \brief A class derived from PseudoSourceValue that represents a GOT entry
34 /// resolved by lazy-binding.
35 class MipsCallEntry : public PseudoSourceValue {
37 explicit MipsCallEntry(StringRef N);
38 explicit MipsCallEntry(const GlobalValue *V);
39 bool isConstant(const MachineFrameInfo *) const override;
40 bool isAliased(const MachineFrameInfo *) const override;
41 bool mayAlias(const MachineFrameInfo *) const override;
44 void printCustom(raw_ostream &O) const override;
47 const GlobalValue *Val;
51 /// MipsFunctionInfo - This class is derived from MachineFunction private
52 /// Mips target-specific information for each MachineFunction.
53 class MipsFunctionInfo : public MachineFunctionInfo {
55 MipsFunctionInfo(MachineFunction &MF)
56 : MF(MF), SRetReturnReg(0), GlobalBaseReg(0), Mips16SPAliasReg(0),
57 VarArgsFrameIndex(0), CallsEhReturn(false), SaveS2(false),
58 MoveF64ViaSpillFI(-1) {}
62 unsigned getSRetReturnReg() const { return SRetReturnReg; }
63 void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; }
65 bool globalBaseRegSet() const;
66 unsigned getGlobalBaseReg();
68 bool mips16SPAliasRegSet() const;
69 unsigned getMips16SPAliasReg();
71 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
72 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
74 bool hasByvalArg() const { return HasByvalArg; }
75 void setFormalArgInfo(unsigned Size, bool HasByval) {
76 IncomingArgSize = Size;
77 HasByvalArg = HasByval;
80 unsigned getIncomingArgSize() const { return IncomingArgSize; }
82 bool callsEhReturn() const { return CallsEhReturn; }
83 void setCallsEhReturn() { CallsEhReturn = true; }
85 void createEhDataRegsFI();
86 int getEhDataRegFI(unsigned Reg) const { return EhDataRegFI[Reg]; }
87 bool isEhDataRegFI(int FI) const;
89 /// \brief Create a MachinePointerInfo that has a MipsCallEntr object
90 /// representing a GOT entry for an external function.
91 MachinePointerInfo callPtrInfo(StringRef Name);
93 /// \brief Create a MachinePointerInfo that has a MipsCallEntr object
94 /// representing a GOT entry for a global function.
95 MachinePointerInfo callPtrInfo(const GlobalValue *Val);
97 void setSaveS2() { SaveS2 = true; }
98 bool hasSaveS2() const { return SaveS2; }
100 int getMoveF64ViaSpillFI(const TargetRegisterClass *RC);
102 std::map<const char *, const llvm::Mips16HardFloatInfo::FuncSignature *>
106 virtual void anchor();
109 /// SRetReturnReg - Some subtargets require that sret lowering includes
110 /// returning the value of the returned struct in a register. This field
111 /// holds the virtual register into which the sret argument is passed.
112 unsigned SRetReturnReg;
114 /// GlobalBaseReg - keeps track of the virtual register initialized for
115 /// use as the global base register. This is used for PIC in some PIC
116 /// relocation models.
117 unsigned GlobalBaseReg;
119 /// Mips16SPAliasReg - keeps track of the virtual register initialized for
120 /// use as an alias for SP for use in load/store of halfword/byte from/to
122 unsigned Mips16SPAliasReg;
124 /// VarArgsFrameIndex - FrameIndex for start of varargs area.
125 int VarArgsFrameIndex;
127 /// True if function has a byval argument.
130 /// Size of incoming argument area.
131 unsigned IncomingArgSize;
133 /// CallsEhReturn - Whether the function calls llvm.eh.return.
136 /// Frame objects for spilling eh data registers.
142 /// FrameIndex for expanding BuildPairF64 nodes to spill and reload when the
143 /// O32 FPXX ABI is enabled. -1 is used to denote invalid index.
144 int MoveF64ViaSpillFI;
146 /// MipsCallEntry maps.
147 StringMap<const MipsCallEntry *> ExternalCallEntries;
148 ValueMap<const GlobalValue *, const MipsCallEntry *> GlobalCallEntries;
151 } // end of namespace llvm