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   uint64_t EHPadStackCounter = 0;
29   SmallVector<std::pair<uint64_t, bool>, 4> ControlFlowStack;
30   SmallVector<uint64_t, 4> EHPadStack;
31 
32   enum EHInstKind { TRY, CATCH, END_TRY };
33   EHInstKind LastSeenEHInst = END_TRY;
34 
35 public:
36   WebAssemblyInstPrinter(const MCAsmInfo &MAI, const MCInstrInfo &MII,
37                          const MCRegisterInfo &MRI);
38 
39   void printRegName(raw_ostream &OS, unsigned RegNo) const override;
40   void printInst(const MCInst *MI, uint64_t Address, StringRef Annot,
41                  const MCSubtargetInfo &STI, raw_ostream &OS) override;
42 
43   // Used by tblegen code.
44   void printOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O,
45                     bool IsVariadicDef = false);
46   void printBrList(const MCInst *MI, unsigned OpNo, raw_ostream &O);
47   void printWebAssemblyP2AlignOperand(const MCInst *MI, unsigned OpNo,
48                                       raw_ostream &O);
49   void printWebAssemblySignatureOperand(const MCInst *MI, unsigned OpNo,
50                                         raw_ostream &O);
51   void printWebAssemblyHeapTypeOperand(const MCInst *MI, unsigned OpNo,
52                                        raw_ostream &O);
53 
54   // Autogenerated by tblgen.
55   std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override;
56   void printInstruction(const MCInst *MI, uint64_t Address, raw_ostream &O);
57   static const char *getRegisterName(unsigned RegNo);
58 };
59 
60 namespace WebAssembly {
61 
62 const char *typeToString(wasm::ValType Ty);
63 const char *anyTypeToString(unsigned Ty);
64 
65 std::string typeListToString(ArrayRef<wasm::ValType> List);
66 std::string signatureToString(const wasm::WasmSignature *Sig);
67 
68 } // end namespace WebAssembly
69 
70 } // end namespace llvm
71 
72 #endif
73