llvm/lib/TableGen/TableGenBackendSkeleton.cpp

   1 //===- SkeletonEmitter.cpp - Skeleton TableGen backend          -*- 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 // This Tablegen backend emits ...
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "llvm/ADT/ArrayRef.h"
  14 #include "llvm/ADT/DenseMap.h"
  15 #include "llvm/ADT/StringExtras.h"
  16 #include "llvm/Support/Format.h"
  17 #include "llvm/Support/MemoryBuffer.h"
  18 #include "llvm/Support/SourceMgr.h"
  19 #include "llvm/TableGen/Error.h"
  20 #include "llvm/TableGen/Record.h"
  21 #include "llvm/TableGen/TableGenBackend.h"
  22 #include <algorithm>
  23 #include <set>
  24 #include <string>
  25 #include <vector>
  26
  27 #define DEBUG_TYPE "skeleton-emitter"
  28
  29 using namespace llvm;
  30
  31 namespace {
  32
  33 // Any helper data structures can be defined here. Some backends use
  34 // structs to collect information from the records.
  35
  36 class SkeletonEmitter {
  37 private:
  38   RecordKeeper &Records;
  39
  40 public:
  41   SkeletonEmitter(RecordKeeper &RK) : Records(RK) {}
  42
  43   void run(raw_ostream &OS);
  44 }; // emitter class
  45
  46 } // anonymous namespace
  47
  48 void SkeletonEmitter::run(raw_ostream &OS) {
  49   emitSourceFileHeader("Skeleton data structures", OS);
  50
  51   (void)Records; // To suppress unused variable warning; remove on use.
  52 }
  53
  54 namespace llvm {
  55
  56 // The only thing that should be in the llvm namespace is the
  57 // emitter entry point function.
  58
  59 void EmitSkeleton(RecordKeeper &RK, raw_ostream &OS) {
  60   // Instantiate the emitter class and invoke run().
  61   SkeletonEmitter(RK).run(OS);
  62 }
  63
  64 } // namespace llvm