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1//===--- CreateInvocationFromCommandLine.cpp - CompilerInvocation from Args ==//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// Construct a compiler invocation object for command line driver arguments
10//
11//===----------------------------------------------------------------------===//
12
13#include "clang/Basic/DiagnosticOptions.h"14#include "clang/Driver/Action.h"15#include "clang/Driver/Compilation.h"16#include "clang/Driver/Driver.h"17#include "clang/Driver/Options.h"18#include "clang/Driver/Tool.h"19#include "clang/Frontend/CompilerInstance.h"20#include "clang/Frontend/FrontendDiagnostic.h"21#include "clang/Frontend/Utils.h"22#include "llvm/ADT/STLExtras.h"23#include "llvm/ADT/StringRef.h"24#include "llvm/Option/ArgList.h"25#include "llvm/TargetParser/Host.h"26using namespace clang;27using namespace llvm::opt;28
29std::unique_ptr<CompilerInvocation>30clang::createInvocation(ArrayRef<const char *> ArgList,31CreateInvocationOptions Opts) {32assert(!ArgList.empty());33auto Diags = Opts.Diags34? std::move(Opts.Diags)35: CompilerInstance::createDiagnostics(new DiagnosticOptions);36
37SmallVector<const char *, 16> Args(ArgList.begin(), ArgList.end());38
39// FIXME: Find a cleaner way to force the driver into restricted modes.40Args.insert(41llvm::find_if(42Args, [](const char *Elem) { return llvm::StringRef(Elem) == "--"; }),43"-fsyntax-only");44
45// FIXME: We shouldn't have to pass in the path info.46driver::Driver TheDriver(Args[0], llvm::sys::getDefaultTargetTriple(), *Diags,47"clang LLVM compiler", Opts.VFS);48
49// Don't check that inputs exist, they may have been remapped.50TheDriver.setCheckInputsExist(false);51TheDriver.setProbePrecompiled(Opts.ProbePrecompiled);52
53std::unique_ptr<driver::Compilation> C(TheDriver.BuildCompilation(Args));54if (!C)55return nullptr;56
57if (C->getArgs().hasArg(driver::options::OPT_fdriver_only))58return nullptr;59
60// Just print the cc1 options if -### was present.61if (C->getArgs().hasArg(driver::options::OPT__HASH_HASH_HASH)) {62C->getJobs().Print(llvm::errs(), "\n", true);63return nullptr;64}65
66// We expect to get back exactly one command job, if we didn't something67// failed. Offload compilation is an exception as it creates multiple jobs. If68// that's the case, we proceed with the first job. If caller needs a69// particular job, it should be controlled via options (e.g.70// --cuda-{host|device}-only for CUDA) passed to the driver.71const driver::JobList &Jobs = C->getJobs();72bool OffloadCompilation = false;73if (Jobs.size() > 1) {74for (auto &A : C->getActions()){75// On MacOSX real actions may end up being wrapped in BindArchAction76if (isa<driver::BindArchAction>(A))77A = *A->input_begin();78if (isa<driver::OffloadAction>(A)) {79OffloadCompilation = true;80break;81}82}83}84
85bool PickFirstOfMany = OffloadCompilation || Opts.RecoverOnError;86if (Jobs.size() == 0 || (Jobs.size() > 1 && !PickFirstOfMany)) {87SmallString<256> Msg;88llvm::raw_svector_ostream OS(Msg);89Jobs.Print(OS, "; ", true);90Diags->Report(diag::err_fe_expected_compiler_job) << OS.str();91return nullptr;92}93auto Cmd = llvm::find_if(Jobs, [](const driver::Command &Cmd) {94return StringRef(Cmd.getCreator().getName()) == "clang";95});96if (Cmd == Jobs.end()) {97Diags->Report(diag::err_fe_expected_clang_command);98return nullptr;99}100
101const ArgStringList &CCArgs = Cmd->getArguments();102if (Opts.CC1Args)103*Opts.CC1Args = {CCArgs.begin(), CCArgs.end()};104auto CI = std::make_unique<CompilerInvocation>();105if (!CompilerInvocation::CreateFromArgs(*CI, CCArgs, *Diags, Args[0]) &&106!Opts.RecoverOnError)107return nullptr;108return CI;109}
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