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> EHPadStack; 30 // 'delegate' can target any block-like structure, but in case the target is 31 // 'try', it rethrows to the corresponding 'catch'. Because it can target all 32 // blocks but with a slightly different semantics with branches, we need a 33 // separate stack for 'delegate'. 34 SmallVector<uint64_t, 4> DelegateStack; 35 36 enum EHInstKind { TRY, CATCH, CATCH_ALL }; 37 SmallVector<EHInstKind, 4> EHInstStack; 38 39 public: 40 WebAssemblyInstPrinter(const MCAsmInfo &MAI, const MCInstrInfo &MII, 41 const MCRegisterInfo &MRI); 42 43 void printRegName(raw_ostream &OS, unsigned RegNo) const override; 44 void printInst(const MCInst *MI, uint64_t Address, StringRef Annot, 45 const MCSubtargetInfo &STI, raw_ostream &OS) override; 46 47 // Used by tblegen code. 48 void printOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O, 49 bool IsVariadicDef = false); 50 void printBrList(const MCInst *MI, unsigned OpNo, raw_ostream &O); 51 void printWebAssemblyP2AlignOperand(const MCInst *MI, unsigned OpNo, 52 raw_ostream &O); 53 void printWebAssemblySignatureOperand(const MCInst *MI, unsigned OpNo, 54 raw_ostream &O); 55 void printWebAssemblyHeapTypeOperand(const MCInst *MI, unsigned OpNo, 56 raw_ostream &O); 57 58 // Autogenerated by tblgen. 59 std::pair<const char *, uint64_t> getMnemonic(const MCInst *MI) override; 60 void printInstruction(const MCInst *MI, uint64_t Address, raw_ostream &O); 61 static const char *getRegisterName(unsigned RegNo); 62 }; 63 64 namespace WebAssembly { 65 66 const char *typeToString(wasm::ValType Ty); 67 const char *anyTypeToString(unsigned Ty); 68 69 std::string typeListToString(ArrayRef<wasm::ValType> List); 70 std::string signatureToString(const wasm::WasmSignature *Sig); 71 72 } // end namespace WebAssembly 73 74 } // end namespace llvm 75 76 #endif 77