MipsAsmPrinter.h revision 276479 
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 MIPSASMPRINTER_H
15#define 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();
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 EmitJal(MCSymbol *Symbol);
64
65  void EmitInstrReg(unsigned Opcode, unsigned Reg);
66
67  void EmitInstrRegReg(unsigned Opcode, unsigned Reg1, unsigned Reg2);
68
69  void EmitInstrRegRegReg(unsigned Opcode, unsigned Reg1, unsigned Reg2,
70                          unsigned Reg3);
71
72  void EmitMovFPIntPair(unsigned MovOpc, unsigned Reg1, unsigned Reg2,
73                        unsigned FPReg1, unsigned FPReg2, bool LE);
74
75  void EmitSwapFPIntParams(Mips16HardFloatInfo::FPParamVariant, bool LE,
76                           bool ToFP);
77
78  void EmitSwapFPIntRetval(Mips16HardFloatInfo::FPReturnVariant, bool LE);
79
80  void EmitFPCallStub(const char *, const Mips16HardFloatInfo::FuncSignature *);
81
82  void NaClAlignIndirectJumpTargets(MachineFunction &MF);
83
84  bool isLongBranchPseudo(int Opcode) const;
85
86public:
87
88  const MipsSubtarget *Subtarget;
89  const MipsFunctionInfo *MipsFI;
90  MipsMCInstLower MCInstLowering;
91
92  // We initialize the subtarget here and in runOnMachineFunction
93  // since there are certain target specific flags (ABI) that could
94  // reside on the TargetMachine, but are on the subtarget currently
95  // and we need them for the beginning of file output before we've
96  // seen a single function.
97  explicit MipsAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
98      : AsmPrinter(TM, Streamer), MCP(nullptr), InConstantPool(false),
99        Subtarget(&TM.getSubtarget<MipsSubtarget>()), MCInstLowering(*this) {}
100
101  const char *getPassName() const override {
102    return "Mips Assembly Printer";
103  }
104
105  bool runOnMachineFunction(MachineFunction &MF) override;
106
107  void EmitConstantPool() override {
108    bool UsingConstantPools =
109      (Subtarget->inMips16Mode() && Subtarget->useConstantIslands());
110    if (!UsingConstantPools)
111      AsmPrinter::EmitConstantPool();
112    // we emit constant pools customly!
113  }
114
115  void EmitInstruction(const MachineInstr *MI) override;
116  void printSavedRegsBitmask();
117  void emitFrameDirective();
118  const char *getCurrentABIString() const;
119  void EmitFunctionEntryLabel() override;
120  void EmitFunctionBodyStart() override;
121  void EmitFunctionBodyEnd() override;
122  bool isBlockOnlyReachableByFallthrough(
123                                   const MachineBasicBlock* MBB) const override;
124  bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
125                       unsigned AsmVariant, const char *ExtraCode,
126                       raw_ostream &O) override;
127  bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum,
128                             unsigned AsmVariant, const char *ExtraCode,
129                             raw_ostream &O) override;
130  void printOperand(const MachineInstr *MI, int opNum, raw_ostream &O);
131  void printUnsignedImm(const MachineInstr *MI, int opNum, raw_ostream &O);
132  void printUnsignedImm8(const MachineInstr *MI, int opNum, raw_ostream &O);
133  void printMemOperand(const MachineInstr *MI, int opNum, raw_ostream &O);
134  void printMemOperandEA(const MachineInstr *MI, int opNum, raw_ostream &O);
135  void printFCCOperand(const MachineInstr *MI, int opNum, raw_ostream &O,
136                       const char *Modifier = nullptr);
137  void EmitStartOfAsmFile(Module &M) override;
138  void EmitEndOfAsmFile(Module &M) override;
139  void PrintDebugValueComment(const MachineInstr *MI, raw_ostream &OS);
140};
141}
142
143#endif
144
145