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
18namespace llvm {
19class MCSymbol;
20class WebAssemblyTargetStreamer;
21class WebAssemblyMCInstLower;
22
23class LLVM_LIBRARY_VISIBILITY WebAssemblyAsmPrinter final : public AsmPrinter {
24  const WebAssemblySubtarget *Subtarget;
25  const MachineRegisterInfo *MRI;
26  WebAssemblyFunctionInfo *MFI;
27  // TODO: Do the uniquing of Signatures here instead of ObjectFileWriter?
28  std::vector<std::unique_ptr<wasm::WasmSignature>> Signatures;
29
30public:
31  explicit WebAssemblyAsmPrinter(TargetMachine &TM,
32                                 std::unique_ptr<MCStreamer> Streamer)
33      : AsmPrinter(TM, std::move(Streamer)), Subtarget(nullptr), MRI(nullptr),
34        MFI(nullptr) {}
35
36  StringRef getPassName() const override {
37    return "WebAssembly Assembly Printer";
38  }
39
40  const WebAssemblySubtarget &getSubtarget() const { return *Subtarget; }
41  void addSignature(std::unique_ptr<wasm::WasmSignature> &&Sig) {
42    Signatures.push_back(std::move(Sig));
43  }
44
45  //===------------------------------------------------------------------===//
46  // MachineFunctionPass Implementation.
47  //===------------------------------------------------------------------===//
48
49  bool runOnMachineFunction(MachineFunction &MF) override {
50    Subtarget = &MF.getSubtarget<WebAssemblySubtarget>();
51    MRI = &MF.getRegInfo();
52    MFI = MF.getInfo<WebAssemblyFunctionInfo>();
53    return AsmPrinter::runOnMachineFunction(MF);
54  }
55
56  //===------------------------------------------------------------------===//
57  // AsmPrinter Implementation.
58  //===------------------------------------------------------------------===//
59
60  void EmitEndOfAsmFile(Module &M) override;
61  void EmitProducerInfo(Module &M);
62  void EmitTargetFeatures(Module &M);
63  void EmitJumpTableInfo() override;
64  void EmitConstantPool() override;
65  void EmitFunctionBodyStart() override;
66  void EmitInstruction(const MachineInstr *MI) override;
67  bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
68                       const char *ExtraCode, raw_ostream &OS) override;
69  bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
70                             const char *ExtraCode, raw_ostream &OS) override;
71
72  MVT getRegType(unsigned RegNo) const;
73  std::string regToString(const MachineOperand &MO);
74  WebAssemblyTargetStreamer *getTargetStreamer();
75};
76
77} // end namespace llvm
78
79#endif
80