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//===-- ASTMerge.cpp - AST Merging Frontent Action --------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "clang/Frontend/ASTUnit.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/ASTDiagnostic.h"
#include "clang/AST/ASTImporter.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,
StringRef Filename) {
// 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, Filename);
}
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());
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(),
Diags, CI.getFileSystemOpts(), false);
if (!Unit)
continue;
ASTImporter Importer(CI.getASTContext(),
CI.getFileManager(),
Unit->getASTContext(),
Unit->getFileManager(),
/*MinimalImport=*/false);
TranslationUnitDecl *TU = Unit->getASTContext().getTranslationUnitDecl();
CI.getASTConsumer().Initialize(CI.getASTContext());
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;
Decl *ToD = Importer.Import(D);
if (ToD) {
DeclGroupRef DGR(ToD);
CI.getASTConsumer().HandleTopLevelDecl(DGR);
}
}
}
AdaptedAction->ExecuteAction();
CI.getDiagnostics().getClient()->EndSourceFile();
}
void ASTMergeAction::EndSourceFileAction() {
return AdaptedAction->EndSourceFileAction();
}
ASTMergeAction::ASTMergeAction(FrontendAction *AdaptedAction,
ArrayRef<std::string> ASTFiles)
: AdaptedAction(AdaptedAction), ASTFiles(ASTFiles.begin(), ASTFiles.end()) {
assert(AdaptedAction && "ASTMergeAction needs an action to adapt");
}
ASTMergeAction::~ASTMergeAction() {
delete AdaptedAction;
}
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();
}