]> CyberLeo.Net >> Repos - FreeBSD/FreeBSD.git/blob - contrib/llvm/tools/clang/lib/Frontend/ASTMerge.cpp
Merge llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and openmp
[FreeBSD/FreeBSD.git] / contrib / llvm / tools / clang / lib / Frontend / ASTMerge.cpp
1 //===-- ASTMerge.cpp - AST Merging Frontend Action --------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 #include "clang/Frontend/ASTUnit.h"
10 #include "clang/AST/ASTContext.h"
11 #include "clang/AST/ASTDiagnostic.h"
12 #include "clang/AST/ASTImporter.h"
13 #include "clang/AST/ASTImporterLookupTable.h"
14 #include "clang/Basic/Diagnostic.h"
15 #include "clang/Frontend/CompilerInstance.h"
16 #include "clang/Frontend/FrontendActions.h"
17
18 using namespace clang;
19
20 std::unique_ptr<ASTConsumer>
21 ASTMergeAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
22   return AdaptedAction->CreateASTConsumer(CI, InFile);
23 }
24
25 bool ASTMergeAction::BeginSourceFileAction(CompilerInstance &CI) {
26   // FIXME: This is a hack. We need a better way to communicate the
27   // AST file, compiler instance, and file name than member variables
28   // of FrontendAction.
29   AdaptedAction->setCurrentInput(getCurrentInput(), takeCurrentASTUnit());
30   AdaptedAction->setCompilerInstance(&CI);
31   return AdaptedAction->BeginSourceFileAction(CI);
32 }
33
34 void ASTMergeAction::ExecuteAction() {
35   CompilerInstance &CI = getCompilerInstance();
36   CI.getDiagnostics().getClient()->BeginSourceFile(
37                                              CI.getASTContext().getLangOpts());
38   CI.getDiagnostics().SetArgToStringFn(&FormatASTNodeDiagnosticArgument,
39                                        &CI.getASTContext());
40   IntrusiveRefCntPtr<DiagnosticIDs>
41       DiagIDs(CI.getDiagnostics().getDiagnosticIDs());
42   ASTImporterLookupTable LookupTable(
43       *CI.getASTContext().getTranslationUnitDecl());
44   for (unsigned I = 0, N = ASTFiles.size(); I != N; ++I) {
45     IntrusiveRefCntPtr<DiagnosticsEngine>
46         Diags(new DiagnosticsEngine(DiagIDs, &CI.getDiagnosticOpts(),
47                                     new ForwardingDiagnosticConsumer(
48                                           *CI.getDiagnostics().getClient()),
49                                     /*ShouldOwnClient=*/true));
50     std::unique_ptr<ASTUnit> Unit = ASTUnit::LoadFromASTFile(
51         ASTFiles[I], CI.getPCHContainerReader(), ASTUnit::LoadEverything, Diags,
52         CI.getFileSystemOpts(), false);
53
54     if (!Unit)
55       continue;
56
57     ASTImporter Importer(CI.getASTContext(), CI.getFileManager(),
58                          Unit->getASTContext(), Unit->getFileManager(),
59                          /*MinimalImport=*/false, &LookupTable);
60
61     TranslationUnitDecl *TU = Unit->getASTContext().getTranslationUnitDecl();
62     for (auto *D : TU->decls()) {
63       // Don't re-import __va_list_tag, __builtin_va_list.
64       if (const auto *ND = dyn_cast<NamedDecl>(D))
65         if (IdentifierInfo *II = ND->getIdentifier())
66           if (II->isStr("__va_list_tag") || II->isStr("__builtin_va_list"))
67             continue;
68
69       Decl *ToD = Importer.Import(D);
70
71       if (ToD) {
72         DeclGroupRef DGR(ToD);
73         CI.getASTConsumer().HandleTopLevelDecl(DGR);
74       }
75     }
76   }
77
78   AdaptedAction->ExecuteAction();
79   CI.getDiagnostics().getClient()->EndSourceFile();
80 }
81
82 void ASTMergeAction::EndSourceFileAction() {
83   return AdaptedAction->EndSourceFileAction();
84 }
85
86 ASTMergeAction::ASTMergeAction(std::unique_ptr<FrontendAction> adaptedAction,
87                                ArrayRef<std::string> ASTFiles)
88 : AdaptedAction(std::move(adaptedAction)), ASTFiles(ASTFiles.begin(), ASTFiles.end()) {
89   assert(AdaptedAction && "ASTMergeAction needs an action to adapt");
90 }
91
92 ASTMergeAction::~ASTMergeAction() {
93 }
94
95 bool ASTMergeAction::usesPreprocessorOnly() const {
96   return AdaptedAction->usesPreprocessorOnly();
97 }
98
99 TranslationUnitKind ASTMergeAction::getTranslationUnitKind() {
100   return AdaptedAction->getTranslationUnitKind();
101 }
102
103 bool ASTMergeAction::hasPCHSupport() const {
104   return AdaptedAction->hasPCHSupport();
105 }
106
107 bool ASTMergeAction::hasASTFileSupport() const {
108   return AdaptedAction->hasASTFileSupport();
109 }
110
111 bool ASTMergeAction::hasCodeCompletionSupport() const {
112   return AdaptedAction->hasCodeCompletionSupport();
113 }