1 | //===- llvm/TableGen/TableGenBackend.h - Backend utilities ------*- 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 | // Useful utilities for TableGen backends. |
10 | // |
11 | //===----------------------------------------------------------------------===// |
12 | |
13 | #ifndef LLVM_TABLEGEN_TABLEGENBACKEND_H |
14 | #define LLVM_TABLEGEN_TABLEGENBACKEND_H |
15 | |
16 | #include "llvm/ADT/StringRef.h" |
17 | #include "llvm/Support/CommandLine.h" |
18 | #include "llvm/Support/ManagedStatic.h" |
19 | #include "llvm/TableGen/Record.h" |
20 | |
21 | namespace llvm { |
22 | |
23 | class RecordKeeper; |
24 | class raw_ostream; |
25 | |
26 | namespace TableGen::Emitter { |
27 | using FnT = void (*)(RecordKeeper &Records, raw_ostream &OS); |
28 | |
29 | struct OptCreatorT { |
30 | static void *call(); |
31 | }; |
32 | |
33 | extern ManagedStatic<cl::opt<FnT>, OptCreatorT> Action; |
34 | |
35 | struct Opt { |
36 | Opt(StringRef Name, FnT CB, StringRef Desc, bool ByDefault = false) { |
37 | if (ByDefault) |
38 | Action->setInitialValue(CB); |
39 | Action->getParser().addLiteralOption(Name, V: CB, HelpStr: Desc); |
40 | } |
41 | }; |
42 | |
43 | template <class EmitterC> class OptClass : Opt { |
44 | static void run(RecordKeeper &RK, raw_ostream &OS) { EmitterC(RK).run(OS); } |
45 | |
46 | public: |
47 | OptClass(StringRef Name, StringRef Desc) : Opt(Name, run, Desc) {} |
48 | }; |
49 | |
50 | } // namespace TableGen::Emitter |
51 | |
52 | /// emitSourceFileHeader - Output an LLVM style file header to the specified |
53 | /// raw_ostream. |
54 | void (StringRef Desc, raw_ostream &OS, |
55 | const RecordKeeper &Record = RecordKeeper()); |
56 | |
57 | } // End llvm namespace |
58 | |
59 | #endif |
60 | |