llvm/lib/Target/WebAssembly/WebAssemblyAsmPrinter.h

   1 // WebAssemblyAsmPrinter.h - WebAssembly implementation of AsmPrinter-*- 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 #ifndef LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYASMPRINTER_H
  10 #define LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYASMPRINTER_H
  11
  12 #include "WebAssemblyMachineFunctionInfo.h"
  13 #include "WebAssemblySubtarget.h"
  14 #include "llvm/CodeGen/AsmPrinter.h"
  15 #include "llvm/MC/MCStreamer.h"
  16 #include "llvm/Target/TargetMachine.h"
  17
  18 namespace llvm {
  19 class WebAssemblyTargetStreamer;
  20
  21 class LLVM_LIBRARY_VISIBILITY WebAssemblyAsmPrinter final : public AsmPrinter {
  22   const WebAssemblySubtarget *Subtarget;
  23   const MachineRegisterInfo *MRI;
  24   WebAssemblyFunctionInfo *MFI;
  25   // TODO: Do the uniquing of Signatures here instead of ObjectFileWriter?
  26   std::vector<std::unique_ptr<wasm::WasmSignature>> Signatures;
  27   std::vector<std::unique_ptr<std::string>> Names;
  28   bool signaturesEmitted = false;
  29
  30   StringRef storeName(StringRef Name) {
  31     std::unique_ptr<std::string> N = std::make_unique<std::string>(Name);
  32     Names.push_back(std::move(N));
  33     return *Names.back();
  34   }
  35
  36 public:
  37   explicit WebAssemblyAsmPrinter(TargetMachine &TM,
  38                                  std::unique_ptr<MCStreamer> Streamer)
  39       : AsmPrinter(TM, std::move(Streamer)), Subtarget(nullptr), MRI(nullptr),
  40         MFI(nullptr) {}
  41
  42   StringRef getPassName() const override {
  43     return "WebAssembly Assembly Printer";
  44   }
  45
  46   const WebAssemblySubtarget &getSubtarget() const { return *Subtarget; }
  47   void addSignature(std::unique_ptr<wasm::WasmSignature> &&Sig) {
  48     Signatures.push_back(std::move(Sig));
  49   }
  50
  51   //===------------------------------------------------------------------===//
  52   // MachineFunctionPass Implementation.
  53   //===------------------------------------------------------------------===//
  54
  55   bool runOnMachineFunction(MachineFunction &MF) override {
  56     Subtarget = &MF.getSubtarget<WebAssemblySubtarget>();
  57     MRI = &MF.getRegInfo();
  58     MFI = MF.getInfo<WebAssemblyFunctionInfo>();
  59     return AsmPrinter::runOnMachineFunction(MF);
  60   }
  61
  62   //===------------------------------------------------------------------===//
  63   // AsmPrinter Implementation.
  64   //===------------------------------------------------------------------===//
  65
  66   void emitEndOfAsmFile(Module &M) override;
  67   void EmitProducerInfo(Module &M);
  68   void EmitTargetFeatures(Module &M);
  69   void EmitFunctionAttributes(Module &M);
  70   void emitSymbolType(const MCSymbolWasm *Sym);
  71   void emitGlobalVariable(const GlobalVariable *GV) override;
  72   void emitJumpTableInfo() override;
  73   void emitConstantPool() override;
  74   void emitFunctionBodyStart() override;
  75   void emitInstruction(const MachineInstr *MI) override;
  76   bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
  77                        const char *ExtraCode, raw_ostream &OS) override;
  78   bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
  79                              const char *ExtraCode, raw_ostream &OS) override;
  80
  81   MVT getRegType(unsigned RegNo) const;
  82   std::string regToString(const MachineOperand &MO);
  83   WebAssemblyTargetStreamer *getTargetStreamer();
  84   MCSymbolWasm *getMCSymbolForFunction(const Function *F, bool EnableEmEH,
  85                                        wasm::WasmSignature *Sig,
  86                                        bool &InvokeDetected);
  87   MCSymbol *getOrCreateWasmSymbol(StringRef Name);
  88   void emitDecls(const Module &M);
  89 };
  90
  91 } // end namespace llvm
  92
  93 #endif