lib/Target/Mips/MipsAsmPrinter.h

   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 "MipsSubtarget.h"
  20 #include "llvm/CodeGen/AsmPrinter.h"
  21 #include "llvm/MC/MCStreamer.h"
  22 #include "llvm/Support/Compiler.h"
  23 #include <algorithm>
  24 #include <map>
  25 #include <memory>
  26
  27 namespace llvm {
  28
  29 class MCOperand;
  30 class MCSubtargetInfo;
  31 class MCSymbol;
  32 class MachineBasicBlock;
  33 class MachineConstantPool;
  34 class MachineFunction;
  35 class MachineInstr;
  36 class MachineOperand;
  37 class MipsFunctionInfo;
  38 class MipsTargetStreamer;
  39 class Module;
  40 class raw_ostream;
  41 class TargetMachine;
  42
  43 class LLVM_LIBRARY_VISIBILITY MipsAsmPrinter : public AsmPrinter {
  44   MipsTargetStreamer &getTargetStreamer() const;
  45
  46   void EmitInstrWithMacroNoAT(const MachineInstr *MI);
  47
  48   //===------------------------------------------------------------------===//
  49   // XRay implementation
  50   //===------------------------------------------------------------------===//
  51
  52 public:
  53   // XRay-specific lowering for Mips.
  54   void LowerPATCHABLE_FUNCTION_ENTER(const MachineInstr &MI);
  55   void LowerPATCHABLE_FUNCTION_EXIT(const MachineInstr &MI);
  56   void LowerPATCHABLE_TAIL_CALL(const MachineInstr &MI);
  57
  58 private:
  59   /// MCP - Keep a pointer to constantpool entries of the current
  60   /// MachineFunction.
  61   const MachineConstantPool *MCP = nullptr;
  62
  63   /// InConstantPool - Maintain state when emitting a sequence of constant
  64   /// pool entries so we can properly mark them as data regions.
  65   bool InConstantPool = false;
  66
  67   std::map<const char *, const Mips16HardFloatInfo::FuncSignature *>
  68       StubsNeeded;
  69
  70   void EmitSled(const MachineInstr &MI, SledKind Kind);
  71
  72   // tblgen'erated function.
  73   bool emitPseudoExpansionLowering(MCStreamer &OutStreamer,
  74                                    const MachineInstr *MI);
  75
  76   // Emit PseudoReturn, PseudoReturn64, PseudoIndirectBranch,
  77   // and PseudoIndirectBranch64 as a JR, JR_MM, JALR, or JALR64 as appropriate
  78   // for the target.
  79   void emitPseudoIndirectBranch(MCStreamer &OutStreamer,
  80                                 const MachineInstr *MI);
  81
  82   // lowerOperand - Convert a MachineOperand into the equivalent MCOperand.
  83   bool lowerOperand(const MachineOperand &MO, MCOperand &MCOp);
  84
  85   void emitInlineAsmStart() const override;
  86
  87   void emitInlineAsmEnd(const MCSubtargetInfo &StartInfo,
  88                         const MCSubtargetInfo *EndInfo) const override;
  89
  90   void EmitJal(const MCSubtargetInfo &STI, MCSymbol *Symbol);
  91
  92   void EmitInstrReg(const MCSubtargetInfo &STI, unsigned Opcode, unsigned Reg);
  93
  94   void EmitInstrRegReg(const MCSubtargetInfo &STI, unsigned Opcode,
  95                        unsigned Reg1, unsigned Reg2);
  96
  97   void EmitInstrRegRegReg(const MCSubtargetInfo &STI, unsigned Opcode,
  98                           unsigned Reg1, unsigned Reg2, unsigned Reg3);
  99
 100   void EmitMovFPIntPair(const MCSubtargetInfo &STI, unsigned MovOpc,
 101                         unsigned Reg1, unsigned Reg2, unsigned FPReg1,
 102                         unsigned FPReg2, bool LE);
 103
 104   void EmitSwapFPIntParams(const MCSubtargetInfo &STI,
 105                            Mips16HardFloatInfo::FPParamVariant, bool LE,
 106                            bool ToFP);
 107
 108   void EmitSwapFPIntRetval(const MCSubtargetInfo &STI,
 109                            Mips16HardFloatInfo::FPReturnVariant, bool LE);
 110
 111   void EmitFPCallStub(const char *, const Mips16HardFloatInfo::FuncSignature *);
 112
 113   void NaClAlignIndirectJumpTargets(MachineFunction &MF);
 114
 115   bool isLongBranchPseudo(int Opcode) const;
 116
 117 public:
 118   const MipsSubtarget *Subtarget;
 119   const MipsFunctionInfo *MipsFI;
 120   MipsMCInstLower MCInstLowering;
 121
 122   explicit MipsAsmPrinter(TargetMachine &TM,
 123                           std::unique_ptr<MCStreamer> Streamer)
 124       : AsmPrinter(TM, std::move(Streamer)), MCInstLowering(*this) {}
 125
 126   StringRef getPassName() const override { return "Mips Assembly Printer"; }
 127
 128   bool runOnMachineFunction(MachineFunction &MF) override;
 129
 130   void EmitConstantPool() override {
 131     bool UsingConstantPools =
 132       (Subtarget->inMips16Mode() && Subtarget->useConstantIslands());
 133     if (!UsingConstantPools)
 134       AsmPrinter::EmitConstantPool();
 135     // we emit constant pools customly!
 136   }
 137
 138   void EmitInstruction(const MachineInstr *MI) override;
 139   void printSavedRegsBitmask();
 140   void emitFrameDirective();
 141   const char *getCurrentABIString() const;
 142   void EmitFunctionEntryLabel() override;
 143   void EmitFunctionBodyStart() override;
 144   void EmitFunctionBodyEnd() override;
 145   void EmitBasicBlockEnd(const MachineBasicBlock &MBB) override;
 146   bool isBlockOnlyReachableByFallthrough(
 147                                    const MachineBasicBlock* MBB) const override;
 148   bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
 149                        unsigned AsmVariant, const char *ExtraCode,
 150                        raw_ostream &O) override;
 151   bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum,
 152                              unsigned AsmVariant, const char *ExtraCode,
 153                              raw_ostream &O) override;
 154   void printOperand(const MachineInstr *MI, int opNum, raw_ostream &O);
 155   void printMemOperand(const MachineInstr *MI, int opNum, raw_ostream &O);
 156   void printMemOperandEA(const MachineInstr *MI, int opNum, raw_ostream &O);
 157   void printFCCOperand(const MachineInstr *MI, int opNum, raw_ostream &O,
 158                        const char *Modifier = nullptr);
 159   void printRegisterList(const MachineInstr *MI, int opNum, raw_ostream &O);
 160   void EmitStartOfAsmFile(Module &M) override;
 161   void EmitEndOfAsmFile(Module &M) override;
 162   void PrintDebugValueComment(const MachineInstr *MI, raw_ostream &OS);
 163   void EmitDebugThreadLocal(const MCExpr *Value, unsigned Size) const override;
 164 };
 165
 166 } // end namespace llvm
 167
 168 #endif // LLVM_LIB_TARGET_MIPS_MIPSASMPRINTER_H