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ClangCodeModel: Minimize QStringList -> QJsonArray conversions

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... when setting up the compilation database.
As it turns out, these conversions were the most expensive part of
creating the JSON file. We now build the JSON arrays incrementally
instead of setting them up from scratch for every source file.

Change-Id: I1e664a6320d5b3c49b31366c58aa14f63818e008
Reviewed-by: David Schulz <david.schulz@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
This commit is contained in:
Christian Kandeler
2022-05-05 17:34:31 +02:00
parent 3ce7ca7242
commit 3d1ba205d0
3 changed files with 71 additions and 26 deletions
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63
src/plugins/clangcodemodel/clangutils.cpp
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@@ -183,11 +183,10 @@ static QStringList projectPartArguments(const ProjectPart &projectPart)
static QJsonObject createFileObject(const FilePath &buildDir,
const QStringList &arguments,
const CompilerOptionsBuilder &optionsBuilder,
const ProjectPart &projectPart,
const ProjectFile &projFile,
CompilationDbPurpose purpose,
const QStringList &projectOptions,
const QJsonArray &projectPartOptions,
UsePrecompiledHeaders usePch)
{
QJsonObject fileObject;
@@ -213,8 +212,7 @@ static QJsonObject createFileObject(const FilePath &buildDir,
args.append(langOptionPart);
}
} else {
args = QJsonArray::fromStringList(clangOptionsForFile(optionsBuilder, projFile,
projectOptions, usePch));
args = clangOptionsForFile(projFile, projectPart, projectPartOptions, usePch);
args.prepend("clang"); // TODO: clang-cl for MSVC targets? Does it matter at all what we put here?
}
@@ -245,15 +243,20 @@ GenerateCompilationDbResult generateCompilationDB(const CppEditor::ProjectInfo::
compileCommandsFile.write("[");
const UsePrecompiledHeaders usePch = getPchUsage();
const QJsonArray jsonProjectOptions = QJsonArray::fromStringList(projectOptions);
for (ProjectPart::ConstPtr projectPart : projectInfo->projectParts()) {
QStringList args;
const CompilerOptionsBuilder optionsBuilder = clangOptionsBuilder(*projectPart,
warningsConfig);
if (purpose == CompilationDbPurpose::Project)
QJsonArray ppOptions;
if (purpose == CompilationDbPurpose::Project) {
args = projectPartArguments(*projectPart);
} else {
ppOptions = fullProjectPartOptions(projectPartOptions(optionsBuilder), jsonProjectOptions);
}
for (const ProjectFile &projFile : projectPart->files) {
const QJsonObject json = createFileObject(baseDir, args, optionsBuilder, *projectPart,
projFile, purpose, projectOptions, usePch);
const QJsonObject json = createFileObject(baseDir, args, *projectPart, projFile,
purpose, ppOptions, usePch);
if (compileCommandsFile.size() > 1)
compileCommandsFile.write(",");
compileCommandsFile.write('\n' + QJsonDocument(json).toJson().trimmed());
@@ -332,25 +335,28 @@ static ClangProjectSettings &getProjectSettings(ProjectExplorer::Project *projec
QTC_CHECK(project);
return ClangModelManagerSupport::instance()->projectSettings(project);
}
} // namespace
QStringList clangOptionsForFile(CompilerOptionsBuilder optionsBuilder,
const ProjectFile &file, const QStringList &projectOptions,
UsePrecompiledHeaders usePch)
QJsonArray clangOptionsForFile(const ProjectFile &file, const ProjectPart &projectPart,
const QJsonArray &generalOptions, UsePrecompiledHeaders usePch)
{
CompilerOptionsBuilder optionsBuilder(projectPart);
ProjectFile::Kind fileKind = file.kind;
if (fileKind == ProjectFile::AmbiguousHeader) {
fileKind = optionsBuilder.projectPart().languageVersion <= LanguageVersion::LatestC
fileKind = projectPart.languageVersion <= LanguageVersion::LatestC
? ProjectFile::CHeader : ProjectFile::CXXHeader;
}
if (usePch == UsePrecompiledHeaders::Yes
&& optionsBuilder.projectPart().precompiledHeaders.contains(file.path)) {
&& projectPart.precompiledHeaders.contains(file.path)) {
usePch = UsePrecompiledHeaders::No;
}
optionsBuilder.updateFileLanguage(file.kind);
optionsBuilder.addPrecompiledHeaderOptions(usePch);
return projectOptions + optionsBuilder.options();
const QJsonArray specificOptions = QJsonArray::fromStringList(optionsBuilder.options());
QJsonArray fullOptions = generalOptions;
for (const QJsonValue &opt : specificOptions)
fullOptions << opt;
return fullOptions;
}
ClangDiagnosticConfig warningsConfigForProject(Project *project)
@@ -449,5 +455,34 @@ CompilerOptionsBuilder clangOptionsBuilder(const ProjectPart &projectPart,
return optionsBuilder;
}
QJsonArray projectPartOptions(const CppEditor::CompilerOptionsBuilder &optionsBuilder)
{
const QStringList optionsList = optionsBuilder.options();
QJsonArray optionsArray;
for (const QString &opt : optionsList) {
// These will be added later by the file-specific code, and they trigger warnings
// if they appear twice; see QTCREATORBUG-26664.
if (opt != "-TP" && opt != "-TC")
optionsArray << opt;
}
return optionsArray;
}
QJsonArray fullProjectPartOptions(const CppEditor::CompilerOptionsBuilder &optionsBuilder,
const QStringList &projectOptions)
{
return fullProjectPartOptions(projectPartOptions(optionsBuilder),
QJsonArray::fromStringList(projectOptions));
}
QJsonArray fullProjectPartOptions(const QJsonArray &projectPartOptions,
const QJsonArray &projectOptions)
{
QJsonArray fullProjectPartOptions = projectPartOptions;
for (const QJsonValue &opt : projectOptions)
fullProjectPartOptions.prepend(opt);
return fullProjectPartOptions;
}
} // namespace Internal
} // namespace Clang