std::unique_ptr<llvm::Module> CodeGenAction::loadModule(MemoryBufferRef MBRef) {
CompilerInstance &CI = getCompilerInstance();
SourceManager &SM = CI.getSourceManager();
// For ThinLTO backend invocations, ensure that the context
// merges types based on ODR identifiers. We also need to read
// the correct module out of a multi-module bitcode file.
if (!CI.getCodeGenOpts().ThinLTOIndexFile.empty()) {
VMContext->enableDebugTypeODRUniquing();
auto DiagErrors = [&](Error E) -> std::unique_ptr<llvm::Module> {
unsigned DiagID =
CI.getDiagnostics().getCustomDiagID(DiagnosticsEngine::Error, "%0");
handleAllErrors(std::move(E), [&](ErrorInfoBase &EIB) {
CI.getDiagnostics().Report(DiagID) << EIB.message();
});
return {};
};
Expected<llvm::BitcodeModule> BMOrErr = FindThinLTOModule(MBRef);
if (!BMOrErr)
return DiagErrors(BMOrErr.takeError());
Expected<std::unique_ptr<llvm::Module>> MOrErr =
BMOrErr->parseModule(*VMContext);
if (!MOrErr)
return DiagErrors(MOrErr.takeError());
return std::move(*MOrErr);
}
llvm::SMDiagnostic Err;
if (std::unique_ptr<llvm::Module> M = parseIR(MBRef, Err, *VMContext))
return M;
// Translate from the diagnostic info to the SourceManager location if
// available.
// TODO: Unify this with ConvertBackendLocation()
SourceLocation Loc;
if (Err.getLineNo() > 0) {
assert(Err.getColumnNo() >= 0);
Loc = SM.translateFileLineCol(SM.getFileEntryForID(SM.getMainFileID()),
Err.getLineNo(), Err.getColumnNo() + 1);
}
// Strip off a leading diagnostic code if there is one.
StringRef Msg = Err.getMessage();
if (Msg.startswith("error: "))
Msg = Msg.substr(7);
unsigned DiagID =
CI.getDiagnostics().getCustomDiagID(DiagnosticsEngine::Error, "%0");
CI.getDiagnostics().Report(Loc, DiagID) << Msg;
return {};
}
