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" 26 using namespace clang; 27 using namespace llvm::opt; 28 29 std::unique_ptr<CompilerInvocation> 30 clang::createInvocation(ArrayRef<const char *> ArgList, 31 CreateInvocationOptions Opts) { 32 assert(!ArgList.empty()); 33 auto Diags = Opts.Diags 34 ? std::move(Opts.Diags) 35 : CompilerInstance::createDiagnostics(new DiagnosticOptions); 36 37 SmallVector<const char *, 16> Args(ArgList.begin(), ArgList.end()); 38 39 // FIXME: Find a cleaner way to force the driver into restricted modes. 40 Args.insert( 41 llvm::find_if( 42 Args, [](const char *Elem) { return llvm::StringRef(Elem) == "--"; }), 43 "-fsyntax-only"); 44 45 // FIXME: We shouldn't have to pass in the path info. 46 driver::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. 50 TheDriver.setCheckInputsExist(false); 51 TheDriver.setProbePrecompiled(Opts.ProbePrecompiled); 52 53 std::unique_ptr<driver::Compilation> C(TheDriver.BuildCompilation(Args)); 54 if (!C) 55 return nullptr; 56 57 if (C->getArgs().hasArg(driver::options::OPT_fdriver_only)) 58 return nullptr; 59 60 // Just print the cc1 options if -### was present. 61 if (C->getArgs().hasArg(driver::options::OPT__HASH_HASH_HASH)) { 62 C->getJobs().Print(llvm::errs(), "\n", true); 63 return nullptr; 64 } 65 66 // We expect to get back exactly one command job, if we didn't something 67 // failed. Offload compilation is an exception as it creates multiple jobs. If 68 // that's the case, we proceed with the first job. If caller needs a 69 // particular job, it should be controlled via options (e.g. 70 // --cuda-{host|device}-only for CUDA) passed to the driver. 71 const driver::JobList &Jobs = C->getJobs(); 72 bool OffloadCompilation = false; 73 if (Jobs.size() > 1) { 74 for (auto &A : C->getActions()){ 75 // On MacOSX real actions may end up being wrapped in BindArchAction 76 if (isa<driver::BindArchAction>(A)) 77 A = *A->input_begin(); 78 if (isa<driver::OffloadAction>(A)) { 79 OffloadCompilation = true; 80 break; 81 } 82 } 83 } 84 85 bool PickFirstOfMany = OffloadCompilation || Opts.RecoverOnError; 86 if (Jobs.size() == 0 || (Jobs.size() > 1 && !PickFirstOfMany)) { 87 SmallString<256> Msg; 88 llvm::raw_svector_ostream OS(Msg); 89 Jobs.Print(OS, "; ", true); 90 Diags->Report(diag::err_fe_expected_compiler_job) << OS.str(); 91 return nullptr; 92 } 93 auto Cmd = llvm::find_if(Jobs, [](const driver::Command &Cmd) { 94 return StringRef(Cmd.getCreator().getName()) == "clang"; 95 }); 96 if (Cmd == Jobs.end()) { 97 Diags->Report(diag::err_fe_expected_clang_command); 98 return nullptr; 99 } 100 101 const ArgStringList &CCArgs = Cmd->getArguments(); 102 if (Opts.CC1Args) 103 *Opts.CC1Args = {CCArgs.begin(), CCArgs.end()}; 104 auto CI = std::make_unique<CompilerInvocation>(); 105 if (!CompilerInvocation::CreateFromArgs(*CI, CCArgs, *Diags, Args[0]) && 106 !Opts.RecoverOnError) 107 return nullptr; 108 return CI; 109 } 110