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//===-- ASTMerge.cpp - AST Merging Frontend Action --------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "clang/Frontend/ASTUnit.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/ASTDiagnostic.h"
#include "clang/AST/ASTImporter.h"
#include "clang/AST/ASTImporterLookupTable.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Frontend/FrontendActions.h"
using namespace clang;
std::unique_ptr<ASTConsumer>
ASTMergeAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
return AdaptedAction->CreateASTConsumer(CI, InFile);
}
bool ASTMergeAction::BeginSourceFileAction(CompilerInstance &CI) {
// FIXME: This is a hack. We need a better way to communicate the
// AST file, compiler instance, and file name than member variables
// of FrontendAction.
AdaptedAction->setCurrentInput(getCurrentInput(), takeCurrentASTUnit());
AdaptedAction->setCompilerInstance(&CI);
return AdaptedAction->BeginSourceFileAction(CI);
}
void ASTMergeAction::ExecuteAction() {
CompilerInstance &CI = getCompilerInstance();
CI.getDiagnostics().getClient()->BeginSourceFile(
CI.getASTContext().getLangOpts());
CI.getDiagnostics().SetArgToStringFn(&FormatASTNodeDiagnosticArgument,
&CI.getASTContext());
IntrusiveRefCntPtr<DiagnosticIDs>
DiagIDs(CI.getDiagnostics().getDiagnosticIDs());
ASTImporterLookupTable LookupTable(
*CI.getASTContext().getTranslationUnitDecl());
for (unsigned I = 0, N = ASTFiles.size(); I != N; ++I) {
IntrusiveRefCntPtr<DiagnosticsEngine>
Diags(new DiagnosticsEngine(DiagIDs, &CI.getDiagnosticOpts(),
new ForwardingDiagnosticConsumer(
*CI.getDiagnostics().getClient()),
/*ShouldOwnClient=*/true));
std::unique_ptr<ASTUnit> Unit = ASTUnit::LoadFromASTFile(
ASTFiles[I], CI.getPCHContainerReader(), ASTUnit::LoadEverything, Diags,
CI.getFileSystemOpts(), false);
if (!Unit)
continue;
ASTImporter Importer(CI.getASTContext(), CI.getFileManager(),
Unit->getASTContext(), Unit->getFileManager(),
/*MinimalImport=*/false, &LookupTable);
TranslationUnitDecl *TU = Unit->getASTContext().getTranslationUnitDecl();
for (auto *D : TU->decls()) {
// Don't re-import __va_list_tag, __builtin_va_list.
if (const auto *ND = dyn_cast<NamedDecl>(D))
if (IdentifierInfo *II = ND->getIdentifier())
if (II->isStr("__va_list_tag") || II->isStr("__builtin_va_list"))
continue;
llvm::Expected<Decl *> ToDOrError = Importer.Import(D);
if (ToDOrError) {
DeclGroupRef DGR(*ToDOrError);
CI.getASTConsumer().HandleTopLevelDecl(DGR);
} else {
llvm::consumeError(ToDOrError.takeError());
}
}
}
AdaptedAction->ExecuteAction();
CI.getDiagnostics().getClient()->EndSourceFile();
}
void ASTMergeAction::EndSourceFileAction() {
return AdaptedAction->EndSourceFileAction();
}
ASTMergeAction::ASTMergeAction(std::unique_ptr<FrontendAction> adaptedAction,
ArrayRef<std::string> ASTFiles)
: AdaptedAction(std::move(adaptedAction)), ASTFiles(ASTFiles.begin(), ASTFiles.end()) {
assert(AdaptedAction && "ASTMergeAction needs an action to adapt");
}
ASTMergeAction::~ASTMergeAction() {
}
bool ASTMergeAction::usesPreprocessorOnly() const {
return AdaptedAction->usesPreprocessorOnly();
}
TranslationUnitKind ASTMergeAction::getTranslationUnitKind() {
return AdaptedAction->getTranslationUnitKind();
}
bool ASTMergeAction::hasPCHSupport() const {
return AdaptedAction->hasPCHSupport();
}
bool ASTMergeAction::hasASTFileSupport() const {
return AdaptedAction->hasASTFileSupport();
}
bool ASTMergeAction::hasCodeCompletionSupport() const {
return AdaptedAction->hasCodeCompletionSupport();
}