xref: /freebsd/contrib/llvm-project/clang/lib/Frontend/CreateInvocationFromCommandLine.cpp (revision acb1f1269c6f4ff89a0d28ba742f6687e9ef779d)
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/Frontend/Utils.h"
14 #include "clang/Basic/DiagnosticOptions.h"
15 #include "clang/Driver/Compilation.h"
16 #include "clang/Driver/Driver.h"
17 #include "clang/Driver/Action.h"
18 #include "clang/Driver/Options.h"
19 #include "clang/Driver/Tool.h"
20 #include "clang/Frontend/CompilerInstance.h"
21 #include "clang/Frontend/FrontendDiagnostic.h"
22 #include "llvm/Option/ArgList.h"
23 #include "llvm/Support/Host.h"
24 using namespace clang;
25 using namespace llvm::opt;
26 
27 std::unique_ptr<CompilerInvocation> clang::createInvocationFromCommandLine(
28     ArrayRef<const char *> ArgList, IntrusiveRefCntPtr<DiagnosticsEngine> Diags,
29     IntrusiveRefCntPtr<llvm::vfs::FileSystem> VFS, bool ShouldRecoverOnErorrs,
30     std::vector<std::string> *CC1Args) {
31   if (!Diags.get()) {
32     // No diagnostics engine was provided, so create our own diagnostics object
33     // with the default options.
34     Diags = CompilerInstance::createDiagnostics(new DiagnosticOptions);
35   }
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.push_back("-fsyntax-only");
41 
42   // FIXME: We shouldn't have to pass in the path info.
43   driver::Driver TheDriver(Args[0], llvm::sys::getDefaultTargetTriple(), *Diags,
44                            "clang LLVM compiler", VFS);
45 
46   // Don't check that inputs exist, they may have been remapped.
47   TheDriver.setCheckInputsExist(false);
48 
49   std::unique_ptr<driver::Compilation> C(TheDriver.BuildCompilation(Args));
50   if (!C)
51     return nullptr;
52 
53   // Just print the cc1 options if -### was present.
54   if (C->getArgs().hasArg(driver::options::OPT__HASH_HASH_HASH)) {
55     C->getJobs().Print(llvm::errs(), "\n", true);
56     return nullptr;
57   }
58 
59   // We expect to get back exactly one command job, if we didn't something
60   // failed. Offload compilation is an exception as it creates multiple jobs. If
61   // that's the case, we proceed with the first job. If caller needs a
62   // particular job, it should be controlled via options (e.g.
63   // --cuda-{host|device}-only for CUDA) passed to the driver.
64   const driver::JobList &Jobs = C->getJobs();
65   bool OffloadCompilation = false;
66   if (Jobs.size() > 1) {
67     for (auto &A : C->getActions()){
68       // On MacOSX real actions may end up being wrapped in BindArchAction
69       if (isa<driver::BindArchAction>(A))
70         A = *A->input_begin();
71       if (isa<driver::OffloadAction>(A)) {
72         OffloadCompilation = true;
73         break;
74       }
75     }
76   }
77   if (Jobs.size() == 0 || !isa<driver::Command>(*Jobs.begin()) ||
78       (Jobs.size() > 1 && !OffloadCompilation)) {
79     SmallString<256> Msg;
80     llvm::raw_svector_ostream OS(Msg);
81     Jobs.Print(OS, "; ", true);
82     Diags->Report(diag::err_fe_expected_compiler_job) << OS.str();
83     return nullptr;
84   }
85 
86   const driver::Command &Cmd = cast<driver::Command>(*Jobs.begin());
87   if (StringRef(Cmd.getCreator().getName()) != "clang") {
88     Diags->Report(diag::err_fe_expected_clang_command);
89     return nullptr;
90   }
91 
92   const ArgStringList &CCArgs = Cmd.getArguments();
93   if (CC1Args)
94     *CC1Args = {CCArgs.begin(), CCArgs.end()};
95   auto CI = std::make_unique<CompilerInvocation>();
96   if (!CompilerInvocation::CreateFromArgs(*CI, CCArgs, *Diags, Args[0]) &&
97       !ShouldRecoverOnErorrs)
98     return nullptr;
99   return CI;
100 }
101