1 //===-- ASTMerge.cpp - AST Merging Frontent 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/Basic/Diagnostic.h"
14 #include "clang/Frontend/CompilerInstance.h"
15 #include "clang/Frontend/FrontendActions.h"
16
17 using namespace clang;
18
19 std::unique_ptr<ASTConsumer>
CreateASTConsumer(CompilerInstance & CI,StringRef InFile)20 ASTMergeAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
21 return AdaptedAction->CreateASTConsumer(CI, InFile);
22 }
23
BeginSourceFileAction(CompilerInstance & CI,StringRef Filename)24 bool ASTMergeAction::BeginSourceFileAction(CompilerInstance &CI,
25 StringRef Filename) {
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, Filename);
32 }
33
ExecuteAction()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 for (unsigned I = 0, N = ASTFiles.size(); I != N; ++I) {
43 IntrusiveRefCntPtr<DiagnosticsEngine>
44 Diags(new DiagnosticsEngine(DiagIDs, &CI.getDiagnosticOpts(),
45 new ForwardingDiagnosticConsumer(
46 *CI.getDiagnostics().getClient()),
47 /*ShouldOwnClient=*/true));
48 std::unique_ptr<ASTUnit> Unit =
49 ASTUnit::LoadFromASTFile(ASTFiles[I], CI.getPCHContainerReader(),
50 Diags, CI.getFileSystemOpts(), false);
51
52 if (!Unit)
53 continue;
54
55 ASTImporter Importer(CI.getASTContext(),
56 CI.getFileManager(),
57 Unit->getASTContext(),
58 Unit->getFileManager(),
59 /*MinimalImport=*/false);
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
EndSourceFileAction()82 void ASTMergeAction::EndSourceFileAction() {
83 return AdaptedAction->EndSourceFileAction();
84 }
85
ASTMergeAction(FrontendAction * AdaptedAction,ArrayRef<std::string> ASTFiles)86 ASTMergeAction::ASTMergeAction(FrontendAction *AdaptedAction,
87 ArrayRef<std::string> ASTFiles)
88 : AdaptedAction(AdaptedAction), ASTFiles(ASTFiles.begin(), ASTFiles.end()) {
89 assert(AdaptedAction && "ASTMergeAction needs an action to adapt");
90 }
91
~ASTMergeAction()92 ASTMergeAction::~ASTMergeAction() {
93 delete AdaptedAction;
94 }
95
usesPreprocessorOnly() const96 bool ASTMergeAction::usesPreprocessorOnly() const {
97 return AdaptedAction->usesPreprocessorOnly();
98 }
99
getTranslationUnitKind()100 TranslationUnitKind ASTMergeAction::getTranslationUnitKind() {
101 return AdaptedAction->getTranslationUnitKind();
102 }
103
hasPCHSupport() const104 bool ASTMergeAction::hasPCHSupport() const {
105 return AdaptedAction->hasPCHSupport();
106 }
107
hasASTFileSupport() const108 bool ASTMergeAction::hasASTFileSupport() const {
109 return AdaptedAction->hasASTFileSupport();
110 }
111
hasCodeCompletionSupport() const112 bool ASTMergeAction::hasCodeCompletionSupport() const {
113 return AdaptedAction->hasCodeCompletionSupport();
114 }
115