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//===- unittests/Serialization/PreambleInNamedModulesTest.cpp -------------===//
//
// 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/CompilerInstance.h"
#include "clang/Frontend/CompilerInvocation.h"
#include "clang/Frontend/FrontendActions.h"
#include "clang/Frontend/PrecompiledPreamble.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/raw_ostream.h"
#include "gtest/gtest.h"
using namespace llvm;
using namespace clang;
namespace {
class PreambleInNamedModulesTest : public ::testing::Test {
void SetUp() override {
ASSERT_FALSE(sys::fs::createUniqueDirectory("modules-test", TestDir));
}
void TearDown() override { sys::fs::remove_directories(TestDir); }
public:
using PathType = SmallString<256>;
PathType TestDir;
void addFile(StringRef Path, StringRef Contents, PathType &AbsPath) {
ASSERT_FALSE(sys::path::is_absolute(Path));
AbsPath = TestDir;
sys::path::append(AbsPath, Path);
ASSERT_FALSE(
sys::fs::create_directories(llvm::sys::path::parent_path(AbsPath)));
std::error_code EC;
llvm::raw_fd_ostream OS(AbsPath, EC);
ASSERT_FALSE(EC);
OS << Contents;
}
void addFile(StringRef Path, StringRef Contents) {
PathType UnusedAbsPath;
addFile(Path, Contents, UnusedAbsPath);
}
};
// Testing that the use of Preamble in named modules can work basically.
// See https://github.com/llvm/llvm-project/issues/80570
TEST_F(PreambleInNamedModulesTest, BasicTest) {
addFile("foo.h", R"cpp(
enum class E {
A,
B,
C,
D
};
)cpp");
PathType MainFilePath;
addFile("A.cppm", R"cpp(
module;
#include "foo.h"
export module A;
export using ::E;
)cpp",
MainFilePath);
IntrusiveRefCntPtr<llvm::vfs::FileSystem> VFS =
llvm::vfs::createPhysicalFileSystem();
DiagnosticOptions DiagOpts;
IntrusiveRefCntPtr<DiagnosticsEngine> Diags =
CompilerInstance::createDiagnostics(*VFS, DiagOpts);
CreateInvocationOptions CIOpts;
CIOpts.Diags = Diags;
CIOpts.VFS = VFS;
const char *Args[] = {"clang++", "-std=c++20", "-working-directory",
TestDir.c_str(), MainFilePath.c_str()};
std::shared_ptr<CompilerInvocation> Invocation =
createInvocation(Args, CIOpts);
ASSERT_TRUE(Invocation);
llvm::ErrorOr<std::unique_ptr<MemoryBuffer>> ContentsBuffer =
llvm::MemoryBuffer::getFile(MainFilePath, /*IsText=*/true);
EXPECT_TRUE(ContentsBuffer);
std::unique_ptr<MemoryBuffer> Buffer = std::move(*ContentsBuffer);
PreambleBounds Bounds =
ComputePreambleBounds(Invocation->getLangOpts(), *Buffer, 0);
PreambleCallbacks Callbacks;
llvm::ErrorOr<PrecompiledPreamble> BuiltPreamble = PrecompiledPreamble::Build(
*Invocation, Buffer.get(), Bounds, *Diags, VFS,
std::make_shared<PCHContainerOperations>(),
/*StoreInMemory=*/false, /*StoragePath=*/TestDir, Callbacks);
ASSERT_FALSE(Diags->hasErrorOccurred());
EXPECT_TRUE(BuiltPreamble);
EXPECT_TRUE(BuiltPreamble->CanReuse(*Invocation, *Buffer, Bounds, *VFS));
BuiltPreamble->OverridePreamble(*Invocation, VFS, Buffer.get());
auto Clang = std::make_unique<CompilerInstance>(std::move(Invocation));
Clang->setDiagnostics(Diags.get());
if (auto VFSWithRemapping = createVFSFromCompilerInvocation(
Clang->getInvocation(), Clang->getDiagnostics(), VFS))
VFS = VFSWithRemapping;
Clang->createFileManager(VFS);
EXPECT_TRUE(Clang->createTarget());
Buffer.release();
SyntaxOnlyAction Action;
EXPECT_TRUE(Clang->ExecuteAction(Action));
EXPECT_FALSE(Clang->getDiagnosticsPtr()->hasErrorOccurred());
}
} // namespace
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