1//===-- MipsAsmPrinter.h - Mips LLVM Assembly Printer ----------*- 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// Mips Assembly printer class.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_LIB_TARGET_MIPS_MIPSASMPRINTER_H
15#define LLVM_LIB_TARGET_MIPS_MIPSASMPRINTER_H
16
17#include "Mips16HardFloatInfo.h"
18#include "MipsMCInstLower.h"
19#include "MipsMachineFunction.h"
20#include "MipsSubtarget.h"
21#include "llvm/CodeGen/AsmPrinter.h"
22#include "llvm/Support/Compiler.h"
23#include "llvm/Target/TargetMachine.h"
24
25namespace llvm {
26class MCStreamer;
27class MachineInstr;
28class MachineBasicBlock;
29class MipsTargetStreamer;
30class Module;
31class raw_ostream;
32
33class LLVM_LIBRARY_VISIBILITY MipsAsmPrinter : public AsmPrinter {
34  MipsTargetStreamer &getTargetStreamer() const;
35
36  void EmitInstrWithMacroNoAT(const MachineInstr *MI);
37
38private:
39  // tblgen'erated function.
40  bool emitPseudoExpansionLowering(MCStreamer &OutStreamer,
41                                   const MachineInstr *MI);
42
43  // Emit PseudoReturn, PseudoReturn64, PseudoIndirectBranch,
44  // and PseudoIndirectBranch64 as a JR, JR_MM, JALR, or JALR64 as appropriate
45  // for the target.
46  void emitPseudoIndirectBranch(MCStreamer &OutStreamer,
47                                const MachineInstr *MI);
48
49  // lowerOperand - Convert a MachineOperand into the equivalent MCOperand.
50  bool lowerOperand(const MachineOperand &MO, MCOperand &MCOp);
51
52  /// MCP - Keep a pointer to constantpool entries of the current
53  /// MachineFunction.
54  const MachineConstantPool *MCP;
55
56  /// InConstantPool - Maintain state when emitting a sequence of constant
57  /// pool entries so we can properly mark them as data regions.
58  bool InConstantPool;
59
60  std::map<const char *, const llvm::Mips16HardFloatInfo::FuncSignature *>
61  StubsNeeded;
62
63  void emitInlineAsmStart() const override;
64
65  void emitInlineAsmEnd(const MCSubtargetInfo &StartInfo,
66                        const MCSubtargetInfo *EndInfo) const override;
67
68  void EmitJal(const MCSubtargetInfo &STI, MCSymbol *Symbol);
69
70  void EmitInstrReg(const MCSubtargetInfo &STI, unsigned Opcode, unsigned Reg);
71
72  void EmitInstrRegReg(const MCSubtargetInfo &STI, unsigned Opcode,
73                       unsigned Reg1, unsigned Reg2);
74
75  void EmitInstrRegRegReg(const MCSubtargetInfo &STI, unsigned Opcode,
76                          unsigned Reg1, unsigned Reg2, unsigned Reg3);
77
78  void EmitMovFPIntPair(const MCSubtargetInfo &STI, unsigned MovOpc,
79                        unsigned Reg1, unsigned Reg2, unsigned FPReg1,
80                        unsigned FPReg2, bool LE);
81
82  void EmitSwapFPIntParams(const MCSubtargetInfo &STI,
83                           Mips16HardFloatInfo::FPParamVariant, bool LE,
84                           bool ToFP);
85
86  void EmitSwapFPIntRetval(const MCSubtargetInfo &STI,
87                           Mips16HardFloatInfo::FPReturnVariant, bool LE);
88
89  void EmitFPCallStub(const char *, const Mips16HardFloatInfo::FuncSignature *);
90
91  void NaClAlignIndirectJumpTargets(MachineFunction &MF);
92
93  bool isLongBranchPseudo(int Opcode) const;
94
95public:
96
97  const MipsSubtarget *Subtarget;
98  const MipsFunctionInfo *MipsFI;
99  MipsMCInstLower MCInstLowering;
100
101  explicit MipsAsmPrinter(TargetMachine &TM,
102                          std::unique_ptr<MCStreamer> Streamer)
103      : AsmPrinter(TM, std::move(Streamer)), MCP(nullptr),
104        InConstantPool(false), MCInstLowering(*this) {}
105
106  const char *getPassName() const override {
107    return "Mips Assembly Printer";
108  }
109
110  bool runOnMachineFunction(MachineFunction &MF) override;
111
112  void EmitConstantPool() override {
113    bool UsingConstantPools =
114      (Subtarget->inMips16Mode() && Subtarget->useConstantIslands());
115    if (!UsingConstantPools)
116      AsmPrinter::EmitConstantPool();
117    // we emit constant pools customly!
118  }
119
120  void EmitInstruction(const MachineInstr *MI) override;
121  void printSavedRegsBitmask();
122  void emitFrameDirective();
123  const char *getCurrentABIString() const;
124  void EmitFunctionEntryLabel() override;
125  void EmitFunctionBodyStart() override;
126  void EmitFunctionBodyEnd() override;
127  void EmitBasicBlockEnd(const MachineBasicBlock &MBB) override;
128  bool isBlockOnlyReachableByFallthrough(
129                                   const MachineBasicBlock* MBB) const override;
130  bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
131                       unsigned AsmVariant, const char *ExtraCode,
132                       raw_ostream &O) override;
133  bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum,
134                             unsigned AsmVariant, const char *ExtraCode,
135                             raw_ostream &O) override;
136  void printOperand(const MachineInstr *MI, int opNum, raw_ostream &O);
137  void printMemOperand(const MachineInstr *MI, int opNum, raw_ostream &O);
138  void printMemOperandEA(const MachineInstr *MI, int opNum, raw_ostream &O);
139  void printFCCOperand(const MachineInstr *MI, int opNum, raw_ostream &O,
140                       const char *Modifier = nullptr);
141  void printRegisterList(const MachineInstr *MI, int opNum, raw_ostream &O);
142  void EmitStartOfAsmFile(Module &M) override;
143  void EmitEndOfAsmFile(Module &M) override;
144  void PrintDebugValueComment(const MachineInstr *MI, raw_ostream &OS);
145};
146}
147
148#endif
149
150