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      1 // WebAssemblyInstPrinter.h - Print wasm MCInst to assembly syntax -*- C++ -*-//
      2 //
      3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
      4 // See https://llvm.org/LICENSE.txt for license information.
      5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
      6 //
      7 //===----------------------------------------------------------------------===//
      8 ///
      9 /// \file
     10 /// This class prints an WebAssembly MCInst to wasm file syntax.
     11 ///
     12 //===----------------------------------------------------------------------===//
     13 
     14 #ifndef LLVM_LIB_TARGET_WEBASSEMBLY_INSTPRINTER_WEBASSEMBLYINSTPRINTER_H
     15 #define LLVM_LIB_TARGET_WEBASSEMBLY_INSTPRINTER_WEBASSEMBLYINSTPRINTER_H
     16 
     17 #include "llvm/ADT/SmallVector.h"
     18 #include "llvm/BinaryFormat/Wasm.h"
     19 #include "llvm/MC/MCInstPrinter.h"
     20 #include "llvm/Support/MachineValueType.h"
     21 
     22 namespace llvm {
     23 
     24 class MCSubtargetInfo;
     25 
     26 class WebAssemblyInstPrinter final : public MCInstPrinter {
     27   uint64_t ControlFlowCounter = 0;
     28   SmallVector<std::pair<uint64_t, bool>, 4> ControlFlowStack;
     29   SmallVector<uint64_t, 4> TryStack;
     30 
     31   enum EHInstKind { TRY, CATCH, CATCH_ALL };
     32   SmallVector<EHInstKind, 4> EHInstStack;
     33 
     34 public:
     35   WebAssemblyInstPrinter(const MCAsmInfo &MAI, const MCInstrInfo &MII,
     36                          const MCRegisterInfo &MRI);
     37 
     38   void printRegName(raw_ostream &OS, unsigned RegNo) const override;
     39   void printInst(const MCInst *MI, uint64_t Address, StringRef Annot,
     40                  const MCSubtargetInfo &STI, raw_ostream &OS) override;
     41 
     42   // Used by tblegen code.
     43   void printOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O,
     44                     bool IsVariadicDef = false);
     45   void printBrList(const MCInst *MI, unsigned OpNo, raw_ostream &O);
     46   void printWebAssemblyP2AlignOperand(const MCInst *MI, unsigned OpNo,
     47                                       raw_ostream &O);
     48   void printWebAssemblySignatureOperand(const MCInst *MI, unsigned OpNo,
     49                                         raw_ostream &O);
     50   void printWebAssemblyHeapTypeOperand(const MCInst *MI, unsigned OpNo,
     51                                        raw_ostream &O);
     52 
     53   // Autogenerated by tblgen.
     54   std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
     55   void printInstruction(const MCInst *MI, uint64_t Address, raw_ostream &O);
     56   static const char *getRegisterName(unsigned RegNo);
     57 };
     58 
     59 } // end namespace llvm
     60 
     61 #endif
     62