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comparison clang/lib/Frontend/CreateInvocationFromCommandLine.cpp @ 150:1d019706d866

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LLVM10
author anatofuz
date Thu, 13 Feb 2020 15:10:13 +0900
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children 2e18cbf3894f
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147:c2174574ed3a 150:1d019706d866
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(),
44 *Diags, 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) &&
97 !ShouldRecoverOnErorrs)
98 return nullptr;
99 return CI;
100 }