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
CreateASTConsumer(CompilerInstance & CI,StringRef InFile)19 ASTConsumer *ASTMergeAction::CreateASTConsumer(CompilerInstance &CI,
20 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 CI.getDiagnostics().getClient(),
46 /*ShouldOwnClient=*/false));
47 ASTUnit *Unit = ASTUnit::LoadFromASTFile(ASTFiles[I], Diags,
48 CI.getFileSystemOpts(), false);
49 if (!Unit)
50 continue;
51
52 ASTImporter Importer(CI.getASTContext(),
53 CI.getFileManager(),
54 Unit->getASTContext(),
55 Unit->getFileManager(),
56 /*MinimalImport=*/false);
57
58 TranslationUnitDecl *TU = Unit->getASTContext().getTranslationUnitDecl();
59 for (DeclContext::decl_iterator D = TU->decls_begin(),
60 DEnd = TU->decls_end();
61 D != DEnd; ++D) {
62 // Don't re-import __va_list_tag, __builtin_va_list.
63 if (NamedDecl *ND = dyn_cast<NamedDecl>(*D))
64 if (IdentifierInfo *II = ND->getIdentifier())
65 if (II->isStr("__va_list_tag") || II->isStr("__builtin_va_list"))
66 continue;
67
68 Importer.Import(*D);
69 }
70
71 delete Unit;
72 }
73
74 AdaptedAction->ExecuteAction();
75 CI.getDiagnostics().getClient()->EndSourceFile();
76 }
77
EndSourceFileAction()78 void ASTMergeAction::EndSourceFileAction() {
79 return AdaptedAction->EndSourceFileAction();
80 }
81
ASTMergeAction(FrontendAction * AdaptedAction,ArrayRef<std::string> ASTFiles)82 ASTMergeAction::ASTMergeAction(FrontendAction *AdaptedAction,
83 ArrayRef<std::string> ASTFiles)
84 : AdaptedAction(AdaptedAction), ASTFiles(ASTFiles.begin(), ASTFiles.end()) {
85 assert(AdaptedAction && "ASTMergeAction needs an action to adapt");
86 }
87
~ASTMergeAction()88 ASTMergeAction::~ASTMergeAction() {
89 delete AdaptedAction;
90 }
91
usesPreprocessorOnly() const92 bool ASTMergeAction::usesPreprocessorOnly() const {
93 return AdaptedAction->usesPreprocessorOnly();
94 }
95
getTranslationUnitKind()96 TranslationUnitKind ASTMergeAction::getTranslationUnitKind() {
97 return AdaptedAction->getTranslationUnitKind();
98 }
99
hasPCHSupport() const100 bool ASTMergeAction::hasPCHSupport() const {
101 return AdaptedAction->hasPCHSupport();
102 }
103
hasASTFileSupport() const104 bool ASTMergeAction::hasASTFileSupport() const {
105 return AdaptedAction->hasASTFileSupport();
106 }
107
hasCodeCompletionSupport() const108 bool ASTMergeAction::hasCodeCompletionSupport() const {
109 return AdaptedAction->hasCodeCompletionSupport();
110 }
111