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llvm-project/clang/lib/Frontend/CompilerInvocation.cpp
JF Bastien 14daa20be1 Automatic variable initialization 
Summary:
Add an option to initialize automatic variables with either a pattern or with
zeroes. The default is still that automatic variables are uninitialized. Also
add attributes to request uninitialized on a per-variable basis, mainly to disable
initialization of large stack arrays when deemed too expensive.

This isn't meant to change the semantics of C and C++. Rather, it's meant to be
a last-resort when programmers inadvertently have some undefined behavior in
their code. This patch aims to make undefined behavior hurt less, which
security-minded people will be very happy about. Notably, this means that
there's no inadvertent information leak when:

  - The compiler re-uses stack slots, and a value is used uninitialized.
  - The compiler re-uses a register, and a value is used uninitialized.
  - Stack structs / arrays / unions with padding are copied.

This patch only addresses stack and register information leaks. There's many
more infoleaks that we could address, and much more undefined behavior that
could be tamed. Let's keep this patch focused, and I'm happy to address related
issues elsewhere.

To keep the patch simple, only some `undef` is removed for now, see
`replaceUndef`. The padding-related infoleaks are therefore not all gone yet.
This will be addressed in a follow-up, mainly because addressing padding-related
leaks should be a stand-alone option which is implied by variable
initialization.

There are three options when it comes to automatic variable initialization:

  0. Uninitialized

    This is C and C++'s default. It's not changing. Depending on code
    generation, a programmer who runs into undefined behavior by using an
    uninialized automatic variable may observe any previous value (including
    program secrets), or any value which the compiler saw fit to materialize on
    the stack or in a register (this could be to synthesize an immediate, to
    refer to code or data locations, to generate cookies, etc).

  1. Pattern initialization

    This is the recommended initialization approach. Pattern initialization's
    goal is to initialize automatic variables with values which will likely
    transform logic bugs into crashes down the line, are easily recognizable in
    a crash dump, without being values which programmers can rely on for useful
    program semantics. At the same time, pattern initialization tries to
    generate code which will optimize well. You'll find the following details in
    `patternFor`:

    - Integers are initialized with repeated 0xAA bytes (infinite scream).
    - Vectors of integers are also initialized with infinite scream.
    - Pointers are initialized with infinite scream on 64-bit platforms because
      it's an unmappable pointer value on architectures I'm aware of. Pointers
      are initialize to 0x000000AA (small scream) on 32-bit platforms because
      32-bit platforms don't consistently offer unmappable pages. When they do
      it's usually the zero page. As people try this out, I expect that we'll
      want to allow different platforms to customize this, let's do so later.
    - Vectors of pointers are initialized the same way pointers are.
    - Floating point values and vectors are initialized with a negative quiet
      NaN with repeated 0xFF payload (e.g. 0xffffffff and 0xffffffffffffffff).
      NaNs are nice (here, anways) because they propagate on arithmetic, making
      it more likely that entire computations become NaN when a single
      uninitialized value sneaks in.
    - Arrays are initialized to their homogeneous elements' initialization
      value, repeated. Stack-based Variable-Length Arrays (VLAs) are
      runtime-initialized to the allocated size (no effort is made for negative
      size, but zero-sized VLAs are untouched even if technically undefined).
    - Structs are initialized to their heterogeneous element's initialization
      values. Zero-size structs are initialized as 0xAA since they're allocated
      a single byte.
    - Unions are initialized using the initialization for the largest member of
      the union.

    Expect the values used for pattern initialization to change over time, as we
    refine heuristics (both for performance and security). The goal is truly to
    avoid injecting semantics into undefined behavior, and we should be
    comfortable changing these values when there's a worthwhile point in doing
    so.

    Why so much infinite scream? Repeated byte patterns tend to be easy to
    synthesize on most architectures, and otherwise memset is usually very
    efficient. For values which aren't entirely repeated byte patterns, LLVM
    will often generate code which does memset + a few stores.

  2. Zero initialization

    Zero initialize all values. This has the unfortunate side-effect of
    providing semantics to otherwise undefined behavior, programs therefore
    might start to rely on this behavior, and that's sad. However, some
    programmers believe that pattern initialization is too expensive for them,
    and data might show that they're right. The only way to make these
    programmers wrong is to offer zero-initialization as an option, figure out
    where they are right, and optimize the compiler into submission. Until the
    compiler provides acceptable performance for all security-minded code, zero
    initialization is a useful (if blunt) tool.

I've been asked for a fourth initialization option: user-provided byte value.
This might be useful, and can easily be added later.

Why is an out-of band initialization mecanism desired? We could instead use
-Wuninitialized! Indeed we could, but then we're forcing the programmer to
provide semantics for something which doesn't actually have any (it's
uninitialized!). It's then unclear whether `int derp = 0;` lends meaning to `0`,
or whether it's just there to shut that warning up. It's also way easier to use
a compiler flag than it is to manually and intelligently initialize all values
in a program.

Why not just rely on static analysis? Because it cannot reason about all dynamic
code paths effectively, and it has false positives. It's a great tool, could get
even better, but it's simply incapable of catching all uses of uninitialized
values.

Why not just rely on memory sanitizer? Because it's not universally available,
has a 3x performance cost, and shouldn't be deployed in production. Again, it's
a great tool, it'll find the dynamic uses of uninitialized variables that your
test coverage hits, but it won't find the ones that you encounter in production.

What's the performance like? Not too bad! Previous publications [0] have cited
2.7 to 4.5% averages. We've commmitted a few patches over the last few months to
address specific regressions, both in code size and performance. In all cases,
the optimizations are generally useful, but variable initialization benefits
from them a lot more than regular code does. We've got a handful of other
optimizations in mind, but the code is in good enough shape and has found enough
latent issues that it's a good time to get the change reviewed, checked in, and
have others kick the tires. We'll continue reducing overheads as we try this out
on diverse codebases.

Is it a good idea? Security-minded folks think so, and apparently so does the
Microsoft Visual Studio team [1] who say "Between 2017 and mid 2018, this
feature would have killed 49 MSRC cases that involved uninitialized struct data
leaking across a trust boundary. It would have also mitigated a number of bugs
involving uninitialized struct data being used directly.". They seem to use pure
zero initialization, and claim to have taken the overheads down to within noise.
Don't just trust Microsoft though, here's another relevant person asking for
this [2]. It's been proposed for GCC [3] and LLVM [4] before.

What are the caveats? A few!

  - Variables declared in unreachable code, and used later, aren't initialized.
    This goto, Duff's device, other objectionable uses of switch. This should
    instead be a hard-error in any serious codebase.
  - Volatile stack variables are still weird. That's pre-existing, it's really
    the language's fault and this patch keeps it weird. We should deprecate
    volatile [5].
  - As noted above, padding isn't fully handled yet.

I don't think these caveats make the patch untenable because they can be
addressed separately.

Should this be on by default? Maybe, in some circumstances. It's a conversation
we can have when we've tried it out sufficiently, and we're confident that we've
eliminated enough of the overheads that most codebases would want to opt-in.
Let's keep our precious undefined behavior until that point in time.

How do I use it:

  1. On the command-line:

    -ftrivial-auto-var-init=uninitialized (the default)
    -ftrivial-auto-var-init=pattern
    -ftrivial-auto-var-init=zero -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang

  2. Using an attribute:

    int dont_initialize_me __attribute((uninitialized));

  [0]: https://users.elis.ugent.be/~jsartor/researchDocs/OOPSLA2011Zero-submit.pdf
  [1]: https://twitter.com/JosephBialek/status/1062774315098112001
  [2]: https://outflux.net/slides/2018/lss/danger.pdf
  [3]: https://gcc.gnu.org/ml/gcc-patches/2014-06/msg00615.html
  [4]: 776a0955ef
  [5]: http://wg21.link/p1152

I've also posted an RFC to cfe-dev: http://lists.llvm.org/pipermail/cfe-dev/2018-November/060172.html

<rdar://problem/39131435>

Reviewers: pcc, kcc, rsmith

Subscribers: JDevlieghere, jkorous, dexonsmith, cfe-commits

Differential Revision: https://reviews.llvm.org/D54604

llvm-svn: 349442
2018-12-18 05:12:21 +00:00

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//===- CompilerInvocation.cpp ---------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "clang/Frontend/CompilerInvocation.h"
#include "TestModuleFileExtension.h"
#include "clang/Basic/Builtins.h"
#include "clang/Basic/CharInfo.h"
#include "clang/Basic/CodeGenOptions.h"
#include "clang/Basic/CommentOptions.h"
#include "clang/Basic/DebugInfoOptions.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/DiagnosticOptions.h"
#include "clang/Basic/FileSystemOptions.h"
#include "clang/Basic/LLVM.h"
#include "clang/Basic/LangOptions.h"
#include "clang/Basic/ObjCRuntime.h"
#include "clang/Basic/Sanitizers.h"
#include "clang/Basic/SourceLocation.h"
#include "clang/Basic/TargetOptions.h"
#include "clang/Basic/Version.h"
#include "clang/Basic/Visibility.h"
#include "clang/Basic/XRayInstr.h"
#include "clang/Config/config.h"
#include "clang/Driver/DriverDiagnostic.h"
#include "clang/Driver/Options.h"
#include "clang/Frontend/CommandLineSourceLoc.h"
#include "clang/Frontend/DependencyOutputOptions.h"
#include "clang/Frontend/FrontendDiagnostic.h"
#include "clang/Frontend/FrontendOptions.h"
#include "clang/Frontend/LangStandard.h"
#include "clang/Frontend/MigratorOptions.h"
#include "clang/Frontend/PreprocessorOutputOptions.h"
#include "clang/Frontend/Utils.h"
#include "clang/Lex/HeaderSearchOptions.h"
#include "clang/Lex/PreprocessorOptions.h"
#include "clang/Sema/CodeCompleteOptions.h"
#include "clang/Serialization/ModuleFileExtension.h"
#include "clang/StaticAnalyzer/Core/AnalyzerOptions.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/CachedHashString.h"
#include "llvm/ADT/Hashing.h"
#include "llvm/ADT/None.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/ADT/Triple.h"
#include "llvm/ADT/Twine.h"
#include "llvm/IR/DebugInfoMetadata.h"
#include "llvm/Linker/Linker.h"
#include "llvm/MC/MCTargetOptions.h"
#include "llvm/Option/Arg.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Option/OptSpecifier.h"
#include "llvm/Option/OptTable.h"
#include "llvm/Option/Option.h"
#include "llvm/ProfileData/InstrProfReader.h"
#include "llvm/Support/CodeGen.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/ErrorOr.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Process.h"
#include "llvm/Support/Regex.h"
#include "llvm/Support/VersionTuple.h"
#include "llvm/Support/VirtualFileSystem.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetOptions.h"
#include <algorithm>
#include <atomic>
#include <cassert>
#include <cstddef>
#include <cstring>
#include <memory>
#include <string>
#include <tuple>
#include <utility>
#include <vector>
using namespace clang;
using namespace driver;
using namespace options;
using namespace llvm::opt;
//===----------------------------------------------------------------------===//
// Initialization.
//===----------------------------------------------------------------------===//
CompilerInvocationBase::CompilerInvocationBase()
: LangOpts(new LangOptions()), TargetOpts(new TargetOptions()),
DiagnosticOpts(new DiagnosticOptions()),
HeaderSearchOpts(new HeaderSearchOptions()),
PreprocessorOpts(new PreprocessorOptions()) {}
CompilerInvocationBase::CompilerInvocationBase(const CompilerInvocationBase &X)
: LangOpts(new LangOptions(*X.getLangOpts())),
TargetOpts(new TargetOptions(X.getTargetOpts())),
DiagnosticOpts(new DiagnosticOptions(X.getDiagnosticOpts())),
HeaderSearchOpts(new HeaderSearchOptions(X.getHeaderSearchOpts())),
PreprocessorOpts(new PreprocessorOptions(X.getPreprocessorOpts())) {}
CompilerInvocationBase::~CompilerInvocationBase() = default;
//===----------------------------------------------------------------------===//
// Deserialization (from args)
//===----------------------------------------------------------------------===//
static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
DiagnosticsEngine &Diags) {
unsigned DefaultOpt = llvm::CodeGenOpt::None;
if (IK.getLanguage() == InputKind::OpenCL && !Args.hasArg(OPT_cl_opt_disable))
DefaultOpt = llvm::CodeGenOpt::Default;
if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
if (A->getOption().matches(options::OPT_O0))
return llvm::CodeGenOpt::None;
if (A->getOption().matches(options::OPT_Ofast))
return llvm::CodeGenOpt::Aggressive;
assert(A->getOption().matches(options::OPT_O));
StringRef S(A->getValue());
if (S == "s" || S == "z" || S.empty())
return llvm::CodeGenOpt::Default;
if (S == "g")
return llvm::CodeGenOpt::Less;
return getLastArgIntValue(Args, OPT_O, DefaultOpt, Diags);
}
return DefaultOpt;
}
static unsigned getOptimizationLevelSize(ArgList &Args) {
if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
if (A->getOption().matches(options::OPT_O)) {
switch (A->getValue()[0]) {
default:
return 0;
case 's':
return 1;
case 'z':
return 2;
}
}
}
return 0;
}
static void addDiagnosticArgs(ArgList &Args, OptSpecifier Group,
OptSpecifier GroupWithValue,
std::vector<std::string> &Diagnostics) {
for (auto *A : Args.filtered(Group)) {
if (A->getOption().getKind() == Option::FlagClass) {
// The argument is a pure flag (such as OPT_Wall or OPT_Wdeprecated). Add
// its name (minus the "W" or "R" at the beginning) to the warning list.
Diagnostics.push_back(A->getOption().getName().drop_front(1));
} else if (A->getOption().matches(GroupWithValue)) {
// This is -Wfoo= or -Rfoo=, where foo is the name of the diagnostic group.
Diagnostics.push_back(A->getOption().getName().drop_front(1).rtrim("=-"));
} else {
// Otherwise, add its value (for OPT_W_Joined and similar).
for (const auto *Arg : A->getValues())
Diagnostics.emplace_back(Arg);
}
}
}
// Parse the Static Analyzer configuration. If \p Diags is set to nullptr,
// it won't verify the input.
static void parseAnalyzerConfigs(AnalyzerOptions &AnOpts,
DiagnosticsEngine *Diags);
static void getAllNoBuiltinFuncValues(ArgList &Args,
std::vector<std::string> &Funcs) {
SmallVector<const char *, 8> Values;
for (const auto &Arg : Args) {
const Option &O = Arg->getOption();
if (O.matches(options::OPT_fno_builtin_)) {
const char *FuncName = Arg->getValue();
if (Builtin::Context::isBuiltinFunc(FuncName))
Values.push_back(FuncName);
}
}
Funcs.insert(Funcs.end(), Values.begin(), Values.end());
}
static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
DiagnosticsEngine &Diags) {
bool Success = true;
if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
StringRef Name = A->getValue();
AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
#define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
.Case(CMDFLAG, NAME##Model)
#include "clang/StaticAnalyzer/Core/Analyses.def"
.Default(NumStores);
if (Value == NumStores) {
Diags.Report(diag::err_drv_invalid_value)
<< A->getAsString(Args) << Name;
Success = false;
} else {
Opts.AnalysisStoreOpt = Value;
}
}
if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
StringRef Name = A->getValue();
AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
#define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
.Case(CMDFLAG, NAME##Model)
#include "clang/StaticAnalyzer/Core/Analyses.def"
.Default(NumConstraints);
if (Value == NumConstraints) {
Diags.Report(diag::err_drv_invalid_value)
<< A->getAsString(Args) << Name;
Success = false;
} else {
Opts.AnalysisConstraintsOpt = Value;
}
}
if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
StringRef Name = A->getValue();
AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN) \
.Case(CMDFLAG, PD_##NAME)
#include "clang/StaticAnalyzer/Core/Analyses.def"
.Default(NUM_ANALYSIS_DIAG_CLIENTS);
if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
Diags.Report(diag::err_drv_invalid_value)
<< A->getAsString(Args) << Name;
Success = false;
} else {
Opts.AnalysisDiagOpt = Value;
}
}
if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
StringRef Name = A->getValue();
AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
#define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
.Case(CMDFLAG, NAME)
#include "clang/StaticAnalyzer/Core/Analyses.def"
.Default(NumPurgeModes);
if (Value == NumPurgeModes) {
Diags.Report(diag::err_drv_invalid_value)
<< A->getAsString(Args) << Name;
Success = false;
} else {
Opts.AnalysisPurgeOpt = Value;
}
}
if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
StringRef Name = A->getValue();
AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
#define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
.Case(CMDFLAG, NAME)
#include "clang/StaticAnalyzer/Core/Analyses.def"
.Default(NumInliningModes);
if (Value == NumInliningModes) {
Diags.Report(diag::err_drv_invalid_value)
<< A->getAsString(Args) << Name;
Success = false;
} else {
Opts.InliningMode = Value;
}
}
Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
Opts.ShowConfigOptionsList = Args.hasArg(OPT_analyzer_config_help);
Opts.ShowEnabledCheckerList = Args.hasArg(OPT_analyzer_list_enabled_checkers);
Opts.ShouldEmitErrorsOnInvalidConfigValue =
/* negated */!llvm::StringSwitch<bool>(
Args.getLastArgValue(OPT_analyzer_config_compatibility_mode))
.Case("true", true)
.Case("false", false)
.Default(false);
Opts.DisableAllChecks = Args.hasArg(OPT_analyzer_disable_all_checks);
Opts.visualizeExplodedGraphWithGraphViz =
Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
Opts.DumpExplodedGraphTo = Args.getLastArgValue(OPT_analyzer_dump_egraph);
Opts.NoRetryExhausted = Args.hasArg(OPT_analyzer_disable_retry_exhausted);
Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
Opts.AnalyzeNestedBlocks =
Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
Opts.maxBlockVisitOnPath =
getLastArgIntValue(Args, OPT_analyzer_max_loop, 4, Diags);
Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
Opts.InlineMaxStackDepth =
getLastArgIntValue(Args, OPT_analyzer_inline_max_stack_depth,
Opts.InlineMaxStackDepth, Diags);
Opts.CheckersControlList.clear();
for (const Arg *A :
Args.filtered(OPT_analyzer_checker, OPT_analyzer_disable_checker)) {
A->claim();
bool enable = (A->getOption().getID() == OPT_analyzer_checker);
// We can have a list of comma separated checker names, e.g:
// '-analyzer-checker=cocoa,unix'
StringRef checkerList = A->getValue();
SmallVector<StringRef, 4> checkers;
checkerList.split(checkers, ",");
for (auto checker : checkers)
Opts.CheckersControlList.emplace_back(checker, enable);
}
// Go through the analyzer configuration options.
for (const auto *A : Args.filtered(OPT_analyzer_config)) {
// We can have a list of comma separated config names, e.g:
// '-analyzer-config key1=val1,key2=val2'
StringRef configList = A->getValue();
SmallVector<StringRef, 4> configVals;
configList.split(configVals, ",");
for (const auto &configVal : configVals) {
StringRef key, val;
std::tie(key, val) = configVal.split("=");
if (val.empty()) {
Diags.Report(SourceLocation(),
diag::err_analyzer_config_no_value) << configVal;
Success = false;
break;
}
if (val.find('=') != StringRef::npos) {
Diags.Report(SourceLocation(),
diag::err_analyzer_config_multiple_values)
<< configVal;
Success = false;
break;
}
// TODO: Check checker options too, possibly in CheckerRegistry.
// Leave unknown non-checker configs unclaimed.
if (!key.contains(":") && Opts.isUnknownAnalyzerConfig(key)) {
if (Opts.ShouldEmitErrorsOnInvalidConfigValue)
Diags.Report(diag::err_analyzer_config_unknown) << key;
continue;
}
A->claim();
Opts.Config[key] = val;
}
}
if (Opts.ShouldEmitErrorsOnInvalidConfigValue)
parseAnalyzerConfigs(Opts, &Diags);
else
parseAnalyzerConfigs(Opts, nullptr);
llvm::raw_string_ostream os(Opts.FullCompilerInvocation);
for (unsigned i = 0; i < Args.getNumInputArgStrings(); ++i) {
if (i != 0)
os << " ";
os << Args.getArgString(i);
}
os.flush();
return Success;
}
static StringRef getStringOption(AnalyzerOptions::ConfigTable &Config,
StringRef OptionName, StringRef DefaultVal) {
return Config.insert({OptionName, DefaultVal}).first->second;
}
static void initOption(AnalyzerOptions::ConfigTable &Config,
DiagnosticsEngine *Diags,
StringRef &OptionField, StringRef Name,
StringRef DefaultVal) {
// String options may be known to invalid (e.g. if the expected string is a
// file name, but the file does not exist), those will have to be checked in
// parseConfigs.
OptionField = getStringOption(Config, Name, DefaultVal);
}
static void initOption(AnalyzerOptions::ConfigTable &Config,
DiagnosticsEngine *Diags,
bool &OptionField, StringRef Name, bool DefaultVal) {
auto PossiblyInvalidVal = llvm::StringSwitch<Optional<bool>>(
getStringOption(Config, Name, (DefaultVal ? "true" : "false")))
.Case("true", true)
.Case("false", false)
.Default(None);
if (!PossiblyInvalidVal) {
if (Diags)
Diags->Report(diag::err_analyzer_config_invalid_input)
<< Name << "a boolean";
else
OptionField = DefaultVal;
} else
OptionField = PossiblyInvalidVal.getValue();
}
static void initOption(AnalyzerOptions::ConfigTable &Config,
DiagnosticsEngine *Diags,
unsigned &OptionField, StringRef Name,
unsigned DefaultVal) {
OptionField = DefaultVal;
bool HasFailed = getStringOption(Config, Name, std::to_string(DefaultVal))
.getAsInteger(10, OptionField);
if (Diags && HasFailed)
Diags->Report(diag::err_analyzer_config_invalid_input)
<< Name << "an unsigned";
}
static void parseAnalyzerConfigs(AnalyzerOptions &AnOpts,
DiagnosticsEngine *Diags) {
// TODO: There's no need to store the entire configtable, it'd be plenty
// enough tostore checker options.
#define ANALYZER_OPTION(TYPE, NAME, CMDFLAG, DESC, DEFAULT_VAL) \
initOption(AnOpts.Config, Diags, AnOpts.NAME, CMDFLAG, DEFAULT_VAL);
#define ANALYZER_OPTION_DEPENDS_ON_USER_MODE(TYPE, NAME, CMDFLAG, DESC, \
SHALLOW_VAL, DEEP_VAL) \
switch (AnOpts.getUserMode()) { \
case UMK_Shallow: \
initOption(AnOpts.Config, Diags, AnOpts.NAME, CMDFLAG, SHALLOW_VAL); \
break; \
case UMK_Deep: \
initOption(AnOpts.Config, Diags, AnOpts.NAME, CMDFLAG, DEEP_VAL); \
break; \
} \
#include "clang/StaticAnalyzer/Core/AnalyzerOptions.def"
#undef ANALYZER_OPTION
#undef ANALYZER_OPTION_DEPENDS_ON_USER_MODE
// At this point, AnalyzerOptions is configured. Let's validate some options.
if (!Diags)
return;
if (!AnOpts.CTUDir.empty() && !llvm::sys::fs::is_directory(AnOpts.CTUDir))
Diags->Report(diag::err_analyzer_config_invalid_input) << "ctu-dir"
<< "a filename";
if (!AnOpts.ModelPath.empty() &&
!llvm::sys::fs::is_directory(AnOpts.ModelPath))
Diags->Report(diag::err_analyzer_config_invalid_input) << "model-path"
<< "a filename";
}
static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
return true;
}
static void ParseCommentArgs(CommentOptions &Opts, ArgList &Args) {
Opts.BlockCommandNames = Args.getAllArgValues(OPT_fcomment_block_commands);
Opts.ParseAllComments = Args.hasArg(OPT_fparse_all_comments);
}
static StringRef getCodeModel(ArgList &Args, DiagnosticsEngine &Diags) {
if (Arg *A = Args.getLastArg(OPT_mcode_model)) {
StringRef Value = A->getValue();
if (Value == "small" || Value == "kernel" || Value == "medium" ||
Value == "large" || Value == "tiny")
return Value;
Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Value;
}
return "default";
}
static llvm::Reloc::Model getRelocModel(ArgList &Args,
DiagnosticsEngine &Diags) {
if (Arg *A = Args.getLastArg(OPT_mrelocation_model)) {
StringRef Value = A->getValue();
auto RM = llvm::StringSwitch<llvm::Optional<llvm::Reloc::Model>>(Value)
.Case("static", llvm::Reloc::Static)
.Case("pic", llvm::Reloc::PIC_)
.Case("ropi", llvm::Reloc::ROPI)
.Case("rwpi", llvm::Reloc::RWPI)
.Case("ropi-rwpi", llvm::Reloc::ROPI_RWPI)
.Case("dynamic-no-pic", llvm::Reloc::DynamicNoPIC)
.Default(None);
if (RM.hasValue())
return *RM;
Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Value;
}
return llvm::Reloc::PIC_;
}
/// Create a new Regex instance out of the string value in \p RpassArg.
/// It returns a pointer to the newly generated Regex instance.
static std::shared_ptr<llvm::Regex>
GenerateOptimizationRemarkRegex(DiagnosticsEngine &Diags, ArgList &Args,
Arg *RpassArg) {
StringRef Val = RpassArg->getValue();
std::string RegexError;
std::shared_ptr<llvm::Regex> Pattern = std::make_shared<llvm::Regex>(Val);
if (!Pattern->isValid(RegexError)) {
Diags.Report(diag::err_drv_optimization_remark_pattern)
<< RegexError << RpassArg->getAsString(Args);
Pattern.reset();
}
return Pattern;
}
static bool parseDiagnosticLevelMask(StringRef FlagName,
const std::vector<std::string> &Levels,
DiagnosticsEngine *Diags,
DiagnosticLevelMask &M) {
bool Success = true;
for (const auto &Level : Levels) {
DiagnosticLevelMask const PM =
llvm::StringSwitch<DiagnosticLevelMask>(Level)
.Case("note", DiagnosticLevelMask::Note)
.Case("remark", DiagnosticLevelMask::Remark)
.Case("warning", DiagnosticLevelMask::Warning)
.Case("error", DiagnosticLevelMask::Error)
.Default(DiagnosticLevelMask::None);
if (PM == DiagnosticLevelMask::None) {
Success = false;
if (Diags)
Diags->Report(diag::err_drv_invalid_value) << FlagName << Level;
}
M = M | PM;
}
return Success;
}
static void parseSanitizerKinds(StringRef FlagName,
const std::vector<std::string> &Sanitizers,
DiagnosticsEngine &Diags, SanitizerSet &S) {
for (const auto &Sanitizer : Sanitizers) {
SanitizerMask K = parseSanitizerValue(Sanitizer, /*AllowGroups=*/false);
if (K == 0)
Diags.Report(diag::err_drv_invalid_value) << FlagName << Sanitizer;
else
S.set(K, true);
}
}
static void parseXRayInstrumentationBundle(StringRef FlagName, StringRef Bundle,
ArgList &Args, DiagnosticsEngine &D,
XRayInstrSet &S) {
llvm::SmallVector<StringRef, 2> BundleParts;
llvm::SplitString(Bundle, BundleParts, ",");
for (const auto B : BundleParts) {
auto Mask = parseXRayInstrValue(B);
if (Mask == XRayInstrKind::None)
if (B != "none")
D.Report(diag::err_drv_invalid_value) << FlagName << Bundle;
else
S.Mask = Mask;
else if (Mask == XRayInstrKind::All)
S.Mask = Mask;
else
S.set(Mask, true);
}
}
// Set the profile kind for fprofile-instrument.
static void setPGOInstrumentor(CodeGenOptions &Opts, ArgList &Args,
DiagnosticsEngine &Diags) {
Arg *A = Args.getLastArg(OPT_fprofile_instrument_EQ);
if (A == nullptr)
return;
StringRef S = A->getValue();
unsigned I = llvm::StringSwitch<unsigned>(S)
.Case("none", CodeGenOptions::ProfileNone)
.Case("clang", CodeGenOptions::ProfileClangInstr)
.Case("llvm", CodeGenOptions::ProfileIRInstr)
.Default(~0U);
if (I == ~0U) {
Diags.Report(diag::err_drv_invalid_pgo_instrumentor) << A->getAsString(Args)
<< S;
return;
}
auto Instrumentor = static_cast<CodeGenOptions::ProfileInstrKind>(I);
Opts.setProfileInstr(Instrumentor);
}
// Set the profile kind using fprofile-instrument-use-path.
static void setPGOUseInstrumentor(CodeGenOptions &Opts,
const Twine &ProfileName) {
auto ReaderOrErr = llvm::IndexedInstrProfReader::create(ProfileName);
// In error, return silently and let Clang PGOUse report the error message.
if (auto E = ReaderOrErr.takeError()) {
llvm::consumeError(std::move(E));
Opts.setProfileUse(CodeGenOptions::ProfileClangInstr);
return;
}
std::unique_ptr<llvm::IndexedInstrProfReader> PGOReader =
std::move(ReaderOrErr.get());
if (PGOReader->isIRLevelProfile())
Opts.setProfileUse(CodeGenOptions::ProfileIRInstr);
else
Opts.setProfileUse(CodeGenOptions::ProfileClangInstr);
}
static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
DiagnosticsEngine &Diags,
const TargetOptions &TargetOpts,
const FrontendOptions &FrontendOpts) {
bool Success = true;
llvm::Triple Triple = llvm::Triple(TargetOpts.Triple);
unsigned OptimizationLevel = getOptimizationLevel(Args, IK, Diags);
// TODO: This could be done in Driver
unsigned MaxOptLevel = 3;
if (OptimizationLevel > MaxOptLevel) {
// If the optimization level is not supported, fall back on the default
// optimization
Diags.Report(diag::warn_drv_optimization_value)
<< Args.getLastArg(OPT_O)->getAsString(Args) << "-O" << MaxOptLevel;
OptimizationLevel = MaxOptLevel;
}
Opts.OptimizationLevel = OptimizationLevel;
// At O0 we want to fully disable inlining outside of cases marked with
// 'alwaysinline' that are required for correctness.
Opts.setInlining((Opts.OptimizationLevel == 0)
? CodeGenOptions::OnlyAlwaysInlining
: CodeGenOptions::NormalInlining);
// Explicit inlining flags can disable some or all inlining even at
// optimization levels above zero.
if (Arg *InlineArg = Args.getLastArg(
options::OPT_finline_functions, options::OPT_finline_hint_functions,
options::OPT_fno_inline_functions, options::OPT_fno_inline)) {
if (Opts.OptimizationLevel > 0) {
const Option &InlineOpt = InlineArg->getOption();
if (InlineOpt.matches(options::OPT_finline_functions))
Opts.setInlining(CodeGenOptions::NormalInlining);
else if (InlineOpt.matches(options::OPT_finline_hint_functions))
Opts.setInlining(CodeGenOptions::OnlyHintInlining);
else
Opts.setInlining(CodeGenOptions::OnlyAlwaysInlining);
}
}
Opts.ExperimentalNewPassManager = Args.hasFlag(
OPT_fexperimental_new_pass_manager, OPT_fno_experimental_new_pass_manager,
/* Default */ ENABLE_EXPERIMENTAL_NEW_PASS_MANAGER);
Opts.DebugPassManager =
Args.hasFlag(OPT_fdebug_pass_manager, OPT_fno_debug_pass_manager,
/* Default */ false);
if (Arg *A = Args.getLastArg(OPT_fveclib)) {
StringRef Name = A->getValue();
if (Name == "Accelerate")
Opts.setVecLib(CodeGenOptions::Accelerate);
else if (Name == "SVML")
Opts.setVecLib(CodeGenOptions::SVML);
else if (Name == "none")
Opts.setVecLib(CodeGenOptions::NoLibrary);
else
Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
}
if (Arg *A = Args.getLastArg(OPT_debug_info_kind_EQ)) {
unsigned Val =
llvm::StringSwitch<unsigned>(A->getValue())
.Case("line-tables-only", codegenoptions::DebugLineTablesOnly)
.Case("line-directives-only", codegenoptions::DebugDirectivesOnly)
.Case("limited", codegenoptions::LimitedDebugInfo)
.Case("standalone", codegenoptions::FullDebugInfo)
.Default(~0U);
if (Val == ~0U)
Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
<< A->getValue();
else
Opts.setDebugInfo(static_cast<codegenoptions::DebugInfoKind>(Val));
}
if (Arg *A = Args.getLastArg(OPT_debugger_tuning_EQ)) {
unsigned Val = llvm::StringSwitch<unsigned>(A->getValue())
.Case("gdb", unsigned(llvm::DebuggerKind::GDB))
.Case("lldb", unsigned(llvm::DebuggerKind::LLDB))
.Case("sce", unsigned(llvm::DebuggerKind::SCE))
.Default(~0U);
if (Val == ~0U)
Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
<< A->getValue();
else
Opts.setDebuggerTuning(static_cast<llvm::DebuggerKind>(Val));
}
Opts.DwarfVersion = getLastArgIntValue(Args, OPT_dwarf_version_EQ, 0, Diags);
Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
Opts.EmitCodeView = Args.hasArg(OPT_gcodeview);
Opts.CodeViewGHash = Args.hasArg(OPT_gcodeview_ghash);
Opts.MacroDebugInfo = Args.hasArg(OPT_debug_info_macro);
Opts.WholeProgramVTables = Args.hasArg(OPT_fwhole_program_vtables);
Opts.LTOVisibilityPublicStd = Args.hasArg(OPT_flto_visibility_public_std);
Opts.SplitDwarfFile = Args.getLastArgValue(OPT_split_dwarf_file);
Opts.SplitDwarfInlining = !Args.hasArg(OPT_fno_split_dwarf_inlining);
if (Arg *A =
Args.getLastArg(OPT_enable_split_dwarf, OPT_enable_split_dwarf_EQ)) {
if (A->getOption().matches(options::OPT_enable_split_dwarf)) {
Opts.setSplitDwarfMode(CodeGenOptions::SplitFileFission);
} else {
StringRef Name = A->getValue();
if (Name == "single")
Opts.setSplitDwarfMode(CodeGenOptions::SingleFileFission);
else if (Name == "split")
Opts.setSplitDwarfMode(CodeGenOptions::SplitFileFission);
else
Diags.Report(diag::err_drv_invalid_value)
<< A->getAsString(Args) << Name;
}
}
Opts.DebugTypeExtRefs = Args.hasArg(OPT_dwarf_ext_refs);
Opts.DebugExplicitImport = Args.hasArg(OPT_dwarf_explicit_import);
Opts.DebugFwdTemplateParams = Args.hasArg(OPT_debug_forward_template_params);
Opts.EmbedSource = Args.hasArg(OPT_gembed_source);
for (const auto &Arg : Args.getAllArgValues(OPT_fdebug_prefix_map_EQ))
Opts.DebugPrefixMap.insert(StringRef(Arg).split('='));
if (const Arg *A =
Args.getLastArg(OPT_emit_llvm_uselists, OPT_no_emit_llvm_uselists))
Opts.EmitLLVMUseLists = A->getOption().getID() == OPT_emit_llvm_uselists;
Opts.DisableLLVMPasses = Args.hasArg(OPT_disable_llvm_passes);
Opts.DisableLifetimeMarkers = Args.hasArg(OPT_disable_lifetimemarkers);
Opts.DisableO0ImplyOptNone = Args.hasArg(OPT_disable_O0_optnone);
Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
Opts.IndirectTlsSegRefs = Args.hasArg(OPT_mno_tls_direct_seg_refs);
Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
OPT_fuse_register_sized_bitfield_access);
Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
Opts.StructPathTBAA = !Args.hasArg(OPT_no_struct_path_tbaa);
Opts.NewStructPathTBAA = !Args.hasArg(OPT_no_struct_path_tbaa) &&
Args.hasArg(OPT_new_struct_path_tbaa);
Opts.FineGrainedBitfieldAccesses =
Args.hasFlag(OPT_ffine_grained_bitfield_accesses,
OPT_fno_fine_grained_bitfield_accesses, false);
Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
Opts.RecordCommandLine = Args.getLastArgValue(OPT_record_command_line);
Opts.MergeAllConstants = Args.hasArg(OPT_fmerge_all_constants);
Opts.NoCommon = Args.hasArg(OPT_fno_common);
Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
Opts.OptimizeSize = getOptimizationLevelSize(Args);
Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
Args.hasArg(OPT_ffreestanding));
if (Opts.SimplifyLibCalls)
getAllNoBuiltinFuncValues(Args, Opts.NoBuiltinFuncs);
Opts.UnrollLoops =
Args.hasFlag(OPT_funroll_loops, OPT_fno_unroll_loops,
(Opts.OptimizationLevel > 1));
Opts.RerollLoops = Args.hasArg(OPT_freroll_loops);
Opts.DisableIntegratedAS = Args.hasArg(OPT_fno_integrated_as);
Opts.Autolink = !Args.hasArg(OPT_fno_autolink);
Opts.SampleProfileFile = Args.getLastArgValue(OPT_fprofile_sample_use_EQ);
Opts.DebugInfoForProfiling = Args.hasFlag(
OPT_fdebug_info_for_profiling, OPT_fno_debug_info_for_profiling, false);
Opts.DebugNameTable = static_cast<unsigned>(
Args.hasArg(OPT_ggnu_pubnames)
? llvm::DICompileUnit::DebugNameTableKind::GNU
: Args.hasArg(OPT_gpubnames)
? llvm::DICompileUnit::DebugNameTableKind::Default
: llvm::DICompileUnit::DebugNameTableKind::None);
Opts.DebugRangesBaseAddress = Args.hasArg(OPT_fdebug_ranges_base_address);
setPGOInstrumentor(Opts, Args, Diags);
Opts.InstrProfileOutput =
Args.getLastArgValue(OPT_fprofile_instrument_path_EQ);
Opts.ProfileInstrumentUsePath =
Args.getLastArgValue(OPT_fprofile_instrument_use_path_EQ);
if (!Opts.ProfileInstrumentUsePath.empty())
setPGOUseInstrumentor(Opts, Opts.ProfileInstrumentUsePath);
Opts.ProfileRemappingFile =
Args.getLastArgValue(OPT_fprofile_remapping_file_EQ);
if (!Opts.ProfileRemappingFile.empty() && !Opts.ExperimentalNewPassManager) {
Diags.Report(diag::err_drv_argument_only_allowed_with)
<< Args.getLastArg(OPT_fprofile_remapping_file_EQ)->getAsString(Args)
<< "-fexperimental-new-pass-manager";
}
Opts.CoverageMapping =
Args.hasFlag(OPT_fcoverage_mapping, OPT_fno_coverage_mapping, false);
Opts.DumpCoverageMapping = Args.hasArg(OPT_dump_coverage_mapping);
Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
Opts.PreserveAsmComments = !Args.hasArg(OPT_fno_preserve_as_comments);
Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
Opts.RegisterGlobalDtorsWithAtExit =
Args.hasArg(OPT_fregister_global_dtors_with_atexit);
Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
Opts.CodeModel = TargetOpts.CodeModel;
Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
Opts.DisableFPElim =
(Args.hasArg(OPT_mdisable_fp_elim) || Args.hasArg(OPT_pg));
Opts.DisableFree = Args.hasArg(OPT_disable_free);
Opts.DiscardValueNames = Args.hasArg(OPT_discard_value_names);
Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
Opts.NoEscapingBlockTailCalls =
Args.hasArg(OPT_fno_escaping_block_tail_calls);
Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable) ||
Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
Args.hasArg(OPT_cl_fast_relaxed_math);
Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
Args.hasArg(OPT_cl_finite_math_only) ||
Args.hasArg(OPT_cl_fast_relaxed_math));
Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
Args.hasArg(OPT_cl_finite_math_only) ||
Args.hasArg(OPT_cl_fast_relaxed_math));
Opts.NoSignedZeros = (Args.hasArg(OPT_fno_signed_zeros) ||
Args.hasArg(OPT_cl_no_signed_zeros) ||
Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
Args.hasArg(OPT_cl_fast_relaxed_math));
Opts.Reassociate = Args.hasArg(OPT_mreassociate);
Opts.FlushDenorm = Args.hasArg(OPT_cl_denorms_are_zero) ||
(Args.hasArg(OPT_fcuda_is_device) &&
Args.hasArg(OPT_fcuda_flush_denormals_to_zero));
Opts.CorrectlyRoundedDivSqrt =
Args.hasArg(OPT_cl_fp32_correctly_rounded_divide_sqrt);
Opts.UniformWGSize =
Args.hasArg(OPT_cl_uniform_work_group_size);
Opts.Reciprocals = Args.getAllArgValues(OPT_mrecip_EQ);
Opts.ReciprocalMath = Args.hasArg(OPT_freciprocal_math);
Opts.NoTrappingMath = Args.hasArg(OPT_fno_trapping_math);
Opts.StrictFloatCastOverflow =
!Args.hasArg(OPT_fno_strict_float_cast_overflow);
Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
Opts.NumRegisterParameters = getLastArgIntValue(Args, OPT_mregparm, 0, Diags);
Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
Opts.FatalWarnings = Args.hasArg(OPT_massembler_fatal_warnings);
Opts.EnableSegmentedStacks = Args.hasArg(OPT_split_stacks);
Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
Opts.IncrementalLinkerCompatible =
Args.hasArg(OPT_mincremental_linker_compatible);
Opts.PIECopyRelocations =
Args.hasArg(OPT_mpie_copy_relocations);
Opts.NoPLT = Args.hasArg(OPT_fno_plt);
Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
Opts.StrictReturn = !Args.hasArg(OPT_fno_strict_return);
Opts.StrictVTablePointers = Args.hasArg(OPT_fstrict_vtable_pointers);
Opts.ForceEmitVTables = Args.hasArg(OPT_fforce_emit_vtables);
Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
Args.hasArg(OPT_cl_fast_relaxed_math);
Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
Opts.RelocationModel = getRelocModel(Args, Diags);
Opts.ThreadModel = Args.getLastArgValue(OPT_mthread_model, "posix");
if (Opts.ThreadModel != "posix" && Opts.ThreadModel != "single")
Diags.Report(diag::err_drv_invalid_value)
<< Args.getLastArg(OPT_mthread_model)->getAsString(Args)
<< Opts.ThreadModel;
Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
Opts.FunctionSections = Args.hasFlag(OPT_ffunction_sections,
OPT_fno_function_sections, false);
Opts.DataSections = Args.hasFlag(OPT_fdata_sections,
OPT_fno_data_sections, false);
Opts.StackSizeSection =
Args.hasFlag(OPT_fstack_size_section, OPT_fno_stack_size_section, false);
Opts.UniqueSectionNames = Args.hasFlag(OPT_funique_section_names,
OPT_fno_unique_section_names, true);
Opts.MergeFunctions = Args.hasArg(OPT_fmerge_functions);
Opts.NoUseJumpTables = Args.hasArg(OPT_fno_jump_tables);
Opts.NullPointerIsValid = Args.hasArg(OPT_fno_delete_null_pointer_checks);
Opts.ProfileSampleAccurate = Args.hasArg(OPT_fprofile_sample_accurate);
Opts.PrepareForLTO = Args.hasArg(OPT_flto, OPT_flto_EQ);
Opts.PrepareForThinLTO = false;
if (Arg *A = Args.getLastArg(OPT_flto_EQ)) {
StringRef S = A->getValue();
if (S == "thin")
Opts.PrepareForThinLTO = true;
else if (S != "full")
Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << S;
}
Opts.LTOUnit = Args.hasFlag(OPT_flto_unit, OPT_fno_lto_unit, false);
if (Arg *A = Args.getLastArg(OPT_fthinlto_index_EQ)) {
if (IK.getLanguage() != InputKind::LLVM_IR)
Diags.Report(diag::err_drv_argument_only_allowed_with)
<< A->getAsString(Args) << "-x ir";
Opts.ThinLTOIndexFile = Args.getLastArgValue(OPT_fthinlto_index_EQ);
}
if (Arg *A = Args.getLastArg(OPT_save_temps_EQ))
Opts.SaveTempsFilePrefix =
llvm::StringSwitch<std::string>(A->getValue())
.Case("obj", FrontendOpts.OutputFile)
.Default(llvm::sys::path::filename(FrontendOpts.OutputFile).str());
Opts.ThinLinkBitcodeFile = Args.getLastArgValue(OPT_fthin_link_bitcode_EQ);
Opts.MSVolatile = Args.hasArg(OPT_fms_volatile);
Opts.VectorizeLoop = Args.hasArg(OPT_vectorize_loops);
Opts.VectorizeSLP = Args.hasArg(OPT_vectorize_slp);
Opts.PreferVectorWidth = Args.getLastArgValue(OPT_mprefer_vector_width_EQ);
Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
Opts.ControlFlowGuard = Args.hasArg(OPT_cfguard);
Opts.DisableGCov = Args.hasArg(OPT_test_coverage);
Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
if (Opts.EmitGcovArcs || Opts.EmitGcovNotes) {
Opts.CoverageDataFile = Args.getLastArgValue(OPT_coverage_data_file);
Opts.CoverageNotesFile = Args.getLastArgValue(OPT_coverage_notes_file);
Opts.CoverageExtraChecksum = Args.hasArg(OPT_coverage_cfg_checksum);
Opts.CoverageNoFunctionNamesInData =
Args.hasArg(OPT_coverage_no_function_names_in_data);
Opts.ProfileFilterFiles =
Args.getLastArgValue(OPT_fprofile_filter_files_EQ);
Opts.ProfileExcludeFiles =
Args.getLastArgValue(OPT_fprofile_exclude_files_EQ);
Opts.CoverageExitBlockBeforeBody =
Args.hasArg(OPT_coverage_exit_block_before_body);
if (Args.hasArg(OPT_coverage_version_EQ)) {
StringRef CoverageVersion = Args.getLastArgValue(OPT_coverage_version_EQ);
if (CoverageVersion.size() != 4) {
Diags.Report(diag::err_drv_invalid_value)
<< Args.getLastArg(OPT_coverage_version_EQ)->getAsString(Args)
<< CoverageVersion;
} else {
memcpy(Opts.CoverageVersion, CoverageVersion.data(), 4);
}
}
}
// Handle -fembed-bitcode option.
if (Arg *A = Args.getLastArg(OPT_fembed_bitcode_EQ)) {
StringRef Name = A->getValue();
unsigned Model = llvm::StringSwitch<unsigned>(Name)
.Case("off", CodeGenOptions::Embed_Off)
.Case("all", CodeGenOptions::Embed_All)
.Case("bitcode", CodeGenOptions::Embed_Bitcode)
.Case("marker", CodeGenOptions::Embed_Marker)
.Default(~0U);
if (Model == ~0U) {
Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
Success = false;
} else
Opts.setEmbedBitcode(
static_cast<CodeGenOptions::EmbedBitcodeKind>(Model));
}
// FIXME: For backend options that are not yet recorded as function
// attributes in the IR, keep track of them so we can embed them in a
// separate data section and use them when building the bitcode.
if (Opts.getEmbedBitcode() == CodeGenOptions::Embed_All) {
for (const auto &A : Args) {
// Do not encode output and input.
if (A->getOption().getID() == options::OPT_o ||
A->getOption().getID() == options::OPT_INPUT ||
A->getOption().getID() == options::OPT_x ||
A->getOption().getID() == options::OPT_fembed_bitcode ||
(A->getOption().getGroup().isValid() &&
A->getOption().getGroup().getID() == options::OPT_W_Group))
continue;
ArgStringList ASL;
A->render(Args, ASL);
for (const auto &arg : ASL) {
StringRef ArgStr(arg);
Opts.CmdArgs.insert(Opts.CmdArgs.end(), ArgStr.begin(), ArgStr.end());
// using \00 to separate each commandline options.
Opts.CmdArgs.push_back('\0');
}
}
}
Opts.PreserveVec3Type = Args.hasArg(OPT_fpreserve_vec3_type);
Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
Opts.InstrumentFunctionsAfterInlining =
Args.hasArg(OPT_finstrument_functions_after_inlining);
Opts.InstrumentFunctionEntryBare =
Args.hasArg(OPT_finstrument_function_entry_bare);
Opts.XRayInstrumentFunctions =
Args.hasArg(OPT_fxray_instrument);
Opts.XRayAlwaysEmitCustomEvents =
Args.hasArg(OPT_fxray_always_emit_customevents);
Opts.XRayAlwaysEmitTypedEvents =
Args.hasArg(OPT_fxray_always_emit_typedevents);
Opts.XRayInstructionThreshold =
getLastArgIntValue(Args, OPT_fxray_instruction_threshold_EQ, 200, Diags);
auto XRayInstrBundles =
Args.getAllArgValues(OPT_fxray_instrumentation_bundle);
if (XRayInstrBundles.empty())
Opts.XRayInstrumentationBundle.Mask = XRayInstrKind::All;
else
for (const auto &A : XRayInstrBundles)
parseXRayInstrumentationBundle("-fxray-instrumentation-bundle=", A, Args,
Diags, Opts.XRayInstrumentationBundle);
Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
Opts.CallFEntry = Args.hasArg(OPT_mfentry);
Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
if (const Arg *A = Args.getLastArg(OPT_fcf_protection_EQ)) {
StringRef Name = A->getValue();
if (Name == "full") {
Opts.CFProtectionReturn = 1;
Opts.CFProtectionBranch = 1;
} else if (Name == "return")
Opts.CFProtectionReturn = 1;
else if (Name == "branch")
Opts.CFProtectionBranch = 1;
else if (Name != "none") {
Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
Success = false;
}
}
if (const Arg *A = Args.getLastArg(OPT_compress_debug_sections,
OPT_compress_debug_sections_EQ)) {
if (A->getOption().getID() == OPT_compress_debug_sections) {
// TODO: be more clever about the compression type auto-detection
Opts.setCompressDebugSections(llvm::DebugCompressionType::GNU);
} else {
auto DCT = llvm::StringSwitch<llvm::DebugCompressionType>(A->getValue())
.Case("none", llvm::DebugCompressionType::None)
.Case("zlib", llvm::DebugCompressionType::Z)
.Case("zlib-gnu", llvm::DebugCompressionType::GNU)
.Default(llvm::DebugCompressionType::None);
Opts.setCompressDebugSections(DCT);
}
}
Opts.RelaxELFRelocations = Args.hasArg(OPT_mrelax_relocations);
Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
for (auto *A :
Args.filtered(OPT_mlink_bitcode_file, OPT_mlink_builtin_bitcode)) {
CodeGenOptions::BitcodeFileToLink F;
F.Filename = A->getValue();
if (A->getOption().matches(OPT_mlink_builtin_bitcode)) {
F.LinkFlags = llvm::Linker::Flags::LinkOnlyNeeded;
// When linking CUDA bitcode, propagate function attributes so that
// e.g. libdevice gets fast-math attrs if we're building with fast-math.
F.PropagateAttrs = true;
F.Internalize = true;
}
Opts.LinkBitcodeFiles.push_back(F);
}
Opts.SanitizeCoverageType =
getLastArgIntValue(Args, OPT_fsanitize_coverage_type, 0, Diags);
Opts.SanitizeCoverageIndirectCalls =
Args.hasArg(OPT_fsanitize_coverage_indirect_calls);
Opts.SanitizeCoverageTraceBB = Args.hasArg(OPT_fsanitize_coverage_trace_bb);
Opts.SanitizeCoverageTraceCmp = Args.hasArg(OPT_fsanitize_coverage_trace_cmp);
Opts.SanitizeCoverageTraceDiv = Args.hasArg(OPT_fsanitize_coverage_trace_div);
Opts.SanitizeCoverageTraceGep = Args.hasArg(OPT_fsanitize_coverage_trace_gep);
Opts.SanitizeCoverage8bitCounters =
Args.hasArg(OPT_fsanitize_coverage_8bit_counters);
Opts.SanitizeCoverageTracePC = Args.hasArg(OPT_fsanitize_coverage_trace_pc);
Opts.SanitizeCoverageTracePCGuard =
Args.hasArg(OPT_fsanitize_coverage_trace_pc_guard);
Opts.SanitizeCoverageNoPrune = Args.hasArg(OPT_fsanitize_coverage_no_prune);
Opts.SanitizeCoverageInline8bitCounters =
Args.hasArg(OPT_fsanitize_coverage_inline_8bit_counters);
Opts.SanitizeCoveragePCTable = Args.hasArg(OPT_fsanitize_coverage_pc_table);
Opts.SanitizeCoverageStackDepth =
Args.hasArg(OPT_fsanitize_coverage_stack_depth);
Opts.SanitizeMemoryTrackOrigins =
getLastArgIntValue(Args, OPT_fsanitize_memory_track_origins_EQ, 0, Diags);
Opts.SanitizeMemoryUseAfterDtor =
Args.hasFlag(OPT_fsanitize_memory_use_after_dtor,
OPT_fno_sanitize_memory_use_after_dtor,
false);
Opts.SanitizeMinimalRuntime = Args.hasArg(OPT_fsanitize_minimal_runtime);
Opts.SanitizeCfiCrossDso = Args.hasArg(OPT_fsanitize_cfi_cross_dso);
Opts.SanitizeCfiICallGeneralizePointers =
Args.hasArg(OPT_fsanitize_cfi_icall_generalize_pointers);
Opts.SanitizeStats = Args.hasArg(OPT_fsanitize_stats);
if (Arg *A = Args.getLastArg(
OPT_fsanitize_address_poison_custom_array_cookie,
OPT_fno_sanitize_address_poison_custom_array_cookie)) {
Opts.SanitizeAddressPoisonCustomArrayCookie =
A->getOption().getID() ==
OPT_fsanitize_address_poison_custom_array_cookie;
}
if (Arg *A = Args.getLastArg(OPT_fsanitize_address_use_after_scope,
OPT_fno_sanitize_address_use_after_scope)) {
Opts.SanitizeAddressUseAfterScope =
A->getOption().getID() == OPT_fsanitize_address_use_after_scope;
}
Opts.SanitizeAddressGlobalsDeadStripping =
Args.hasArg(OPT_fsanitize_address_globals_dead_stripping);
if (Arg *A = Args.getLastArg(OPT_fsanitize_address_use_odr_indicator,
OPT_fno_sanitize_address_use_odr_indicator)) {
Opts.SanitizeAddressUseOdrIndicator =
A->getOption().getID() == OPT_fsanitize_address_use_odr_indicator;
}
Opts.SSPBufferSize =
getLastArgIntValue(Args, OPT_stack_protector_buffer_size, 8, Diags);
Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
StringRef Val = A->getValue();
unsigned StackAlignment = Opts.StackAlignment;
Val.getAsInteger(10, StackAlignment);
Opts.StackAlignment = StackAlignment;
}
if (Arg *A = Args.getLastArg(OPT_mstack_probe_size)) {
StringRef Val = A->getValue();
unsigned StackProbeSize = Opts.StackProbeSize;
Val.getAsInteger(0, StackProbeSize);
Opts.StackProbeSize = StackProbeSize;
}
Opts.NoStackArgProbe = Args.hasArg(OPT_mno_stack_arg_probe);
if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
StringRef Name = A->getValue();
unsigned Method = llvm::StringSwitch<unsigned>(Name)
.Case("legacy", CodeGenOptions::Legacy)
.Case("non-legacy", CodeGenOptions::NonLegacy)
.Case("mixed", CodeGenOptions::Mixed)
.Default(~0U);
if (Method == ~0U) {
Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
Success = false;
} else {
Opts.setObjCDispatchMethod(
static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
}
}
if (Args.hasArg(OPT_fno_objc_convert_messages_to_runtime_calls))
Opts.ObjCConvertMessagesToRuntimeCalls = 0;
if (Args.getLastArg(OPT_femulated_tls) ||
Args.getLastArg(OPT_fno_emulated_tls)) {
Opts.ExplicitEmulatedTLS = true;
Opts.EmulatedTLS =
Args.hasFlag(OPT_femulated_tls, OPT_fno_emulated_tls, false);
}
if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
StringRef Name = A->getValue();
unsigned Model = llvm::StringSwitch<unsigned>(Name)
.Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
.Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
.Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
.Case("local-exec", CodeGenOptions::LocalExecTLSModel)
.Default(~0U);
if (Model == ~0U) {
Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
Success = false;
} else {
Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
}
}
if (Arg *A = Args.getLastArg(OPT_fdenormal_fp_math_EQ)) {
StringRef Val = A->getValue();
if (Val == "ieee")
Opts.FPDenormalMode = "ieee";
else if (Val == "preserve-sign")
Opts.FPDenormalMode = "preserve-sign";
else if (Val == "positive-zero")
Opts.FPDenormalMode = "positive-zero";
else
Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
}
if (Arg *A = Args.getLastArg(OPT_fpcc_struct_return, OPT_freg_struct_return)) {
if (A->getOption().matches(OPT_fpcc_struct_return)) {
Opts.setStructReturnConvention(CodeGenOptions::SRCK_OnStack);
} else {
assert(A->getOption().matches(OPT_freg_struct_return));
Opts.setStructReturnConvention(CodeGenOptions::SRCK_InRegs);
}
}
Opts.DependentLibraries = Args.getAllArgValues(OPT_dependent_lib);
Opts.LinkerOptions = Args.getAllArgValues(OPT_linker_option);
bool NeedLocTracking = false;
Opts.OptRecordFile = Args.getLastArgValue(OPT_opt_record_file);
if (!Opts.OptRecordFile.empty())
NeedLocTracking = true;
if (Arg *A = Args.getLastArg(OPT_Rpass_EQ)) {
Opts.OptimizationRemarkPattern =
GenerateOptimizationRemarkRegex(Diags, Args, A);
NeedLocTracking = true;
}
if (Arg *A = Args.getLastArg(OPT_Rpass_missed_EQ)) {
Opts.OptimizationRemarkMissedPattern =
GenerateOptimizationRemarkRegex(Diags, Args, A);
NeedLocTracking = true;
}
if (Arg *A = Args.getLastArg(OPT_Rpass_analysis_EQ)) {
Opts.OptimizationRemarkAnalysisPattern =
GenerateOptimizationRemarkRegex(Diags, Args, A);
NeedLocTracking = true;
}
Opts.DiagnosticsWithHotness =
Args.hasArg(options::OPT_fdiagnostics_show_hotness);
bool UsingSampleProfile = !Opts.SampleProfileFile.empty();
bool UsingProfile = UsingSampleProfile ||
(Opts.getProfileUse() != CodeGenOptions::ProfileNone);
if (Opts.DiagnosticsWithHotness && !UsingProfile &&
// An IR file will contain PGO as metadata
IK.getLanguage() != InputKind::LLVM_IR)
Diags.Report(diag::warn_drv_diagnostics_hotness_requires_pgo)
<< "-fdiagnostics-show-hotness";
Opts.DiagnosticsHotnessThreshold = getLastArgUInt64Value(
Args, options::OPT_fdiagnostics_hotness_threshold_EQ, 0);
if (Opts.DiagnosticsHotnessThreshold > 0 && !UsingProfile)
Diags.Report(diag::warn_drv_diagnostics_hotness_requires_pgo)
<< "-fdiagnostics-hotness-threshold=";
// If the user requested to use a sample profile for PGO, then the
// backend will need to track source location information so the profile
// can be incorporated into the IR.
if (UsingSampleProfile)
NeedLocTracking = true;
// If the user requested a flag that requires source locations available in
// the backend, make sure that the backend tracks source location information.
if (NeedLocTracking && Opts.getDebugInfo() == codegenoptions::NoDebugInfo)
Opts.setDebugInfo(codegenoptions::LocTrackingOnly);
Opts.RewriteMapFiles = Args.getAllArgValues(OPT_frewrite_map_file);
// Parse -fsanitize-recover= arguments.
// FIXME: Report unrecoverable sanitizers incorrectly specified here.
parseSanitizerKinds("-fsanitize-recover=",
Args.getAllArgValues(OPT_fsanitize_recover_EQ), Diags,
Opts.SanitizeRecover);
parseSanitizerKinds("-fsanitize-trap=",
Args.getAllArgValues(OPT_fsanitize_trap_EQ), Diags,
Opts.SanitizeTrap);
Opts.CudaGpuBinaryFileName =
Args.getLastArgValue(OPT_fcuda_include_gpubinary);
Opts.Backchain = Args.hasArg(OPT_mbackchain);
Opts.EmitCheckPathComponentsToStrip = getLastArgIntValue(
Args, OPT_fsanitize_undefined_strip_path_components_EQ, 0, Diags);
Opts.EmitVersionIdentMetadata = Args.hasFlag(OPT_Qy, OPT_Qn, true);
Opts.Addrsig = Args.hasArg(OPT_faddrsig);
if (Arg *A = Args.getLastArg(OPT_msign_return_address_EQ)) {
StringRef SignScope = A->getValue();
if (SignScope.equals_lower("none"))
Opts.setSignReturnAddress(CodeGenOptions::SignReturnAddressScope::None);
else if (SignScope.equals_lower("all"))
Opts.setSignReturnAddress(CodeGenOptions::SignReturnAddressScope::All);
else if (SignScope.equals_lower("non-leaf"))
Opts.setSignReturnAddress(
CodeGenOptions::SignReturnAddressScope::NonLeaf);
else
Diags.Report(diag::err_drv_invalid_value)
<< A->getAsString(Args) << SignScope;
if (Arg *A = Args.getLastArg(OPT_msign_return_address_key_EQ)) {
StringRef SignKey = A->getValue();
if (!SignScope.empty() && !SignKey.empty()) {
if (SignKey.equals_lower("a_key"))
Opts.setSignReturnAddressKey(
CodeGenOptions::SignReturnAddressKeyValue::AKey);
else if (SignKey.equals_lower("b_key"))
Opts.setSignReturnAddressKey(
CodeGenOptions::SignReturnAddressKeyValue::BKey);
else
Diags.Report(diag::err_drv_invalid_value)
<< A->getAsString(Args) << SignKey;
}
}
}
Opts.BranchTargetEnforcement = Args.hasArg(OPT_mbranch_target_enforce);
Opts.KeepStaticConsts = Args.hasArg(OPT_fkeep_static_consts);
Opts.SpeculativeLoadHardening = Args.hasArg(OPT_mspeculative_load_hardening);
return Success;
}
static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
ArgList &Args) {
Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
Opts.Targets = Args.getAllArgValues(OPT_MT);
Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
Opts.IncludeModuleFiles = Args.hasArg(OPT_module_file_deps);
Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
if (Args.hasArg(OPT_show_includes)) {
// Writing both /showIncludes and preprocessor output to stdout
// would produce interleaved output, so use stderr for /showIncludes.
// This behaves the same as cl.exe, when /E, /EP or /P are passed.
if (Args.hasArg(options::OPT_E) || Args.hasArg(options::OPT_P))
Opts.ShowIncludesDest = ShowIncludesDestination::Stderr;
else
Opts.ShowIncludesDest = ShowIncludesDestination::Stdout;
} else {
Opts.ShowIncludesDest = ShowIncludesDestination::None;
}
Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
Opts.ModuleDependencyOutputDir =
Args.getLastArgValue(OPT_module_dependency_dir);
if (Args.hasArg(OPT_MV))
Opts.OutputFormat = DependencyOutputFormat::NMake;
// Add sanitizer blacklists as extra dependencies.
// They won't be discovered by the regular preprocessor, so
// we let make / ninja to know about this implicit dependency.
Opts.ExtraDeps = Args.getAllArgValues(OPT_fdepfile_entry);
// Only the -fmodule-file=<file> form.
for (const auto *A : Args.filtered(OPT_fmodule_file)) {
StringRef Val = A->getValue();
if (Val.find('=') == StringRef::npos)
Opts.ExtraDeps.push_back(Val);
}
}
static bool parseShowColorsArgs(const ArgList &Args, bool DefaultColor) {
// Color diagnostics default to auto ("on" if terminal supports) in the driver
// but default to off in cc1, needing an explicit OPT_fdiagnostics_color.
// Support both clang's -f[no-]color-diagnostics and gcc's
// -f[no-]diagnostics-colors[=never|always|auto].
enum {
Colors_On,
Colors_Off,
Colors_Auto
} ShowColors = DefaultColor ? Colors_Auto : Colors_Off;
for (auto *A : Args) {
const Option &O = A->getOption();
if (O.matches(options::OPT_fcolor_diagnostics) ||
O.matches(options::OPT_fdiagnostics_color)) {
ShowColors = Colors_On;
} else if (O.matches(options::OPT_fno_color_diagnostics) ||
O.matches(options::OPT_fno_diagnostics_color)) {
ShowColors = Colors_Off;
} else if (O.matches(options::OPT_fdiagnostics_color_EQ)) {
StringRef Value(A->getValue());
if (Value == "always")
ShowColors = Colors_On;
else if (Value == "never")
ShowColors = Colors_Off;
else if (Value == "auto")
ShowColors = Colors_Auto;
}
}
return ShowColors == Colors_On ||
(ShowColors == Colors_Auto &&
llvm::sys::Process::StandardErrHasColors());
}
static bool checkVerifyPrefixes(const std::vector<std::string> &VerifyPrefixes,
DiagnosticsEngine *Diags) {
bool Success = true;
for (const auto &Prefix : VerifyPrefixes) {
// Every prefix must start with a letter and contain only alphanumeric
// characters, hyphens, and underscores.
auto BadChar = std::find_if(Prefix.begin(), Prefix.end(),
[](char C){return !isAlphanumeric(C)
&& C != '-' && C != '_';});
if (BadChar != Prefix.end() || !isLetter(Prefix[0])) {
Success = false;
if (Diags) {
Diags->Report(diag::err_drv_invalid_value) << "-verify=" << Prefix;
Diags->Report(diag::note_drv_verify_prefix_spelling);
}
}
}
return Success;
}
bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
DiagnosticsEngine *Diags,
bool DefaultDiagColor, bool DefaultShowOpt) {
bool Success = true;
Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
if (Arg *A =
Args.getLastArg(OPT_diagnostic_serialized_file, OPT__serialize_diags))
Opts.DiagnosticSerializationFile = A->getValue();
Opts.IgnoreWarnings = Args.hasArg(OPT_w);
Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
Opts.Pedantic = Args.hasArg(OPT_pedantic);
Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
Opts.ShowColors = parseShowColorsArgs(Args, DefaultDiagColor);
Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
OPT_fno_show_column,
/*Default=*/true);
Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
Opts.AbsolutePath = Args.hasArg(OPT_fdiagnostics_absolute_paths);
Opts.ShowOptionNames =
Args.hasFlag(OPT_fdiagnostics_show_option,
OPT_fno_diagnostics_show_option, DefaultShowOpt);
llvm::sys::Process::UseANSIEscapeCodes(Args.hasArg(OPT_fansi_escape_codes));
// Default behavior is to not to show note include stacks.
Opts.ShowNoteIncludeStack = false;
if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
OPT_fno_diagnostics_show_note_include_stack))
if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
Opts.ShowNoteIncludeStack = true;
StringRef ShowOverloads =
Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
if (ShowOverloads == "best")
Opts.setShowOverloads(Ovl_Best);
else if (ShowOverloads == "all")
Opts.setShowOverloads(Ovl_All);
else {
Success = false;
if (Diags)
Diags->Report(diag::err_drv_invalid_value)
<< Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
<< ShowOverloads;
}
StringRef ShowCategory =
Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
if (ShowCategory == "none")
Opts.ShowCategories = 0;
else if (ShowCategory == "id")
Opts.ShowCategories = 1;
else if (ShowCategory == "name")
Opts.ShowCategories = 2;
else {
Success = false;
if (Diags)
Diags->Report(diag::err_drv_invalid_value)
<< Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
<< ShowCategory;
}
StringRef Format =
Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
if (Format == "clang")
Opts.setFormat(DiagnosticOptions::Clang);
else if (Format == "msvc")
Opts.setFormat(DiagnosticOptions::MSVC);
else if (Format == "msvc-fallback") {
Opts.setFormat(DiagnosticOptions::MSVC);
Opts.CLFallbackMode = true;
} else if (Format == "vi")
Opts.setFormat(DiagnosticOptions::Vi);
else {
Success = false;
if (Diags)
Diags->Report(diag::err_drv_invalid_value)
<< Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
<< Format;
}
Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
Opts.ShowPresumedLoc = !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
Opts.VerifyDiagnostics = Args.hasArg(OPT_verify) || Args.hasArg(OPT_verify_EQ);
Opts.VerifyPrefixes = Args.getAllArgValues(OPT_verify_EQ);
if (Args.hasArg(OPT_verify))
Opts.VerifyPrefixes.push_back("expected");
// Keep VerifyPrefixes in its original order for the sake of diagnostics, and
// then sort it to prepare for fast lookup using std::binary_search.
if (!checkVerifyPrefixes(Opts.VerifyPrefixes, Diags)) {
Opts.VerifyDiagnostics = false;
Success = false;
}
else
llvm::sort(Opts.VerifyPrefixes);
DiagnosticLevelMask DiagMask = DiagnosticLevelMask::None;
Success &= parseDiagnosticLevelMask("-verify-ignore-unexpected=",
Args.getAllArgValues(OPT_verify_ignore_unexpected_EQ),
Diags, DiagMask);
if (Args.hasArg(OPT_verify_ignore_unexpected))
DiagMask = DiagnosticLevelMask::All;
Opts.setVerifyIgnoreUnexpected(DiagMask);
Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
Opts.MacroBacktraceLimit =
getLastArgIntValue(Args, OPT_fmacro_backtrace_limit,
DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
Opts.TemplateBacktraceLimit = getLastArgIntValue(
Args, OPT_ftemplate_backtrace_limit,
DiagnosticOptions::DefaultTemplateBacktraceLimit, Diags);
Opts.ConstexprBacktraceLimit = getLastArgIntValue(
Args, OPT_fconstexpr_backtrace_limit,
DiagnosticOptions::DefaultConstexprBacktraceLimit, Diags);
Opts.SpellCheckingLimit = getLastArgIntValue(
Args, OPT_fspell_checking_limit,
DiagnosticOptions::DefaultSpellCheckingLimit, Diags);
Opts.SnippetLineLimit = getLastArgIntValue(
Args, OPT_fcaret_diagnostics_max_lines,
DiagnosticOptions::DefaultSnippetLineLimit, Diags);
Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
DiagnosticOptions::DefaultTabStop, Diags);
if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
Opts.TabStop = DiagnosticOptions::DefaultTabStop;
if (Diags)
Diags->Report(diag::warn_ignoring_ftabstop_value)
<< Opts.TabStop << DiagnosticOptions::DefaultTabStop;
}
Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
addDiagnosticArgs(Args, OPT_W_Group, OPT_W_value_Group, Opts.Warnings);
addDiagnosticArgs(Args, OPT_R_Group, OPT_R_value_Group, Opts.Remarks);
return Success;
}
static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
}
/// Parse the argument to the -ftest-module-file-extension
/// command-line argument.
///
/// \returns true on error, false on success.
static bool parseTestModuleFileExtensionArg(StringRef Arg,
std::string &BlockName,
unsigned &MajorVersion,
unsigned &MinorVersion,
bool &Hashed,
std::string &UserInfo) {
SmallVector<StringRef, 5> Args;
Arg.split(Args, ':', 5);
if (Args.size() < 5)
return true;
BlockName = Args[0];
if (Args[1].getAsInteger(10, MajorVersion)) return true;
if (Args[2].getAsInteger(10, MinorVersion)) return true;
if (Args[3].getAsInteger(2, Hashed)) return true;
if (Args.size() > 4)
UserInfo = Args[4];
return false;
}
static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
DiagnosticsEngine &Diags,
bool &IsHeaderFile) {
Opts.ProgramAction = frontend::ParseSyntaxOnly;
if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
switch (A->getOption().getID()) {
default:
llvm_unreachable("Invalid option in group!");
case OPT_ast_list:
Opts.ProgramAction = frontend::ASTDeclList; break;
case OPT_ast_dump:
case OPT_ast_dump_all:
case OPT_ast_dump_lookups:
Opts.ProgramAction = frontend::ASTDump; break;
case OPT_ast_print:
Opts.ProgramAction = frontend::ASTPrint; break;
case OPT_ast_view:
Opts.ProgramAction = frontend::ASTView; break;
case OPT_compiler_options_dump:
Opts.ProgramAction = frontend::DumpCompilerOptions; break;
case OPT_dump_raw_tokens:
Opts.ProgramAction = frontend::DumpRawTokens; break;
case OPT_dump_tokens:
Opts.ProgramAction = frontend::DumpTokens; break;
case OPT_S:
Opts.ProgramAction = frontend::EmitAssembly; break;
case OPT_emit_llvm_bc:
Opts.ProgramAction = frontend::EmitBC; break;
case OPT_emit_html:
Opts.ProgramAction = frontend::EmitHTML; break;
case OPT_emit_llvm:
Opts.ProgramAction = frontend::EmitLLVM; break;
case OPT_emit_llvm_only:
Opts.ProgramAction = frontend::EmitLLVMOnly; break;
case OPT_emit_codegen_only:
Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
case OPT_emit_obj:
Opts.ProgramAction = frontend::EmitObj; break;
case OPT_fixit_EQ:
Opts.FixItSuffix = A->getValue();
LLVM_FALLTHROUGH;
case OPT_fixit:
Opts.ProgramAction = frontend::FixIt; break;
case OPT_emit_module:
Opts.ProgramAction = frontend::GenerateModule; break;
case OPT_emit_module_interface:
Opts.ProgramAction = frontend::GenerateModuleInterface; break;
case OPT_emit_header_module:
Opts.ProgramAction = frontend::GenerateHeaderModule; break;
case OPT_emit_pch:
Opts.ProgramAction = frontend::GeneratePCH; break;
case OPT_init_only:
Opts.ProgramAction = frontend::InitOnly; break;
case OPT_fsyntax_only:
Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
case OPT_module_file_info:
Opts.ProgramAction = frontend::ModuleFileInfo; break;
case OPT_verify_pch:
Opts.ProgramAction = frontend::VerifyPCH; break;
case OPT_print_preamble:
Opts.ProgramAction = frontend::PrintPreamble; break;
case OPT_E:
Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
case OPT_templight_dump:
Opts.ProgramAction = frontend::TemplightDump; break;
case OPT_rewrite_macros:
Opts.ProgramAction = frontend::RewriteMacros; break;
case OPT_rewrite_objc:
Opts.ProgramAction = frontend::RewriteObjC; break;
case OPT_rewrite_test:
Opts.ProgramAction = frontend::RewriteTest; break;
case OPT_analyze:
Opts.ProgramAction = frontend::RunAnalysis; break;
case OPT_migrate:
Opts.ProgramAction = frontend::MigrateSource; break;
case OPT_Eonly:
Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
}
}
if (const Arg* A = Args.getLastArg(OPT_plugin)) {
Opts.Plugins.emplace_back(A->getValue(0));
Opts.ProgramAction = frontend::PluginAction;
Opts.ActionName = A->getValue();
}
Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
for (const auto *AA : Args.filtered(OPT_plugin_arg))
Opts.PluginArgs[AA->getValue(0)].emplace_back(AA->getValue(1));
for (const std::string &Arg :
Args.getAllArgValues(OPT_ftest_module_file_extension_EQ)) {
std::string BlockName;
unsigned MajorVersion;
unsigned MinorVersion;
bool Hashed;
std::string UserInfo;
if (parseTestModuleFileExtensionArg(Arg, BlockName, MajorVersion,
MinorVersion, Hashed, UserInfo)) {
Diags.Report(diag::err_test_module_file_extension_format) << Arg;
continue;
}
// Add the testing module file extension.
Opts.ModuleFileExtensions.push_back(
std::make_shared<TestModuleFileExtension>(
BlockName, MajorVersion, MinorVersion, Hashed, UserInfo));
}
if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
Opts.CodeCompletionAt =
ParsedSourceLocation::FromString(A->getValue());
if (Opts.CodeCompletionAt.FileName.empty())
Diags.Report(diag::err_drv_invalid_value)
<< A->getAsString(Args) << A->getValue();
}
Opts.DisableFree = Args.hasArg(OPT_disable_free);
Opts.OutputFile = Args.getLastArgValue(OPT_o);
Opts.Plugins = Args.getAllArgValues(OPT_load);
Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
Opts.ShowHelp = Args.hasArg(OPT_help);
Opts.ShowStats = Args.hasArg(OPT_print_stats);
Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
Opts.ShowVersion = Args.hasArg(OPT_version);
Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
Opts.ASTDumpDecls = Args.hasArg(OPT_ast_dump);
Opts.ASTDumpAll = Args.hasArg(OPT_ast_dump_all);
Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
Opts.ASTDumpLookups = Args.hasArg(OPT_ast_dump_lookups);
Opts.UseGlobalModuleIndex = !Args.hasArg(OPT_fno_modules_global_index);
Opts.GenerateGlobalModuleIndex = Opts.UseGlobalModuleIndex;
Opts.ModuleMapFiles = Args.getAllArgValues(OPT_fmodule_map_file);
// Only the -fmodule-file=<file> form.
for (const auto *A : Args.filtered(OPT_fmodule_file)) {
StringRef Val = A->getValue();
if (Val.find('=') == StringRef::npos)
Opts.ModuleFiles.push_back(Val);
}
Opts.ModulesEmbedFiles = Args.getAllArgValues(OPT_fmodules_embed_file_EQ);
Opts.ModulesEmbedAllFiles = Args.hasArg(OPT_fmodules_embed_all_files);
Opts.IncludeTimestamps = !Args.hasArg(OPT_fno_pch_timestamp);
Opts.CodeCompleteOpts.IncludeMacros
= Args.hasArg(OPT_code_completion_macros);
Opts.CodeCompleteOpts.IncludeCodePatterns
= Args.hasArg(OPT_code_completion_patterns);
Opts.CodeCompleteOpts.IncludeGlobals
= !Args.hasArg(OPT_no_code_completion_globals);
Opts.CodeCompleteOpts.IncludeNamespaceLevelDecls
= !Args.hasArg(OPT_no_code_completion_ns_level_decls);
Opts.CodeCompleteOpts.IncludeBriefComments
= Args.hasArg(OPT_code_completion_brief_comments);
Opts.CodeCompleteOpts.IncludeFixIts
= Args.hasArg(OPT_code_completion_with_fixits);
Opts.OverrideRecordLayoutsFile
= Args.getLastArgValue(OPT_foverride_record_layout_EQ);
Opts.AuxTriple = Args.getLastArgValue(OPT_aux_triple);
Opts.StatsFile = Args.getLastArgValue(OPT_stats_file);
if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
OPT_arcmt_modify,
OPT_arcmt_migrate)) {
switch (A->getOption().getID()) {
default:
llvm_unreachable("missed a case");
case OPT_arcmt_check:
Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
break;
case OPT_arcmt_modify:
Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
break;
case OPT_arcmt_migrate:
Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
break;
}
}
Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
Opts.ARCMTMigrateReportOut
= Args.getLastArgValue(OPT_arcmt_migrate_report_output);
Opts.ARCMTMigrateEmitARCErrors
= Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
if (Args.hasArg(OPT_objcmt_migrate_literals))
Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
if (Args.hasArg(OPT_objcmt_migrate_subscripting))
Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
if (Args.hasArg(OPT_objcmt_migrate_property_dot_syntax))
Opts.ObjCMTAction |= FrontendOptions::ObjCMT_PropertyDotSyntax;
if (Args.hasArg(OPT_objcmt_migrate_property))
Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Property;
if (Args.hasArg(OPT_objcmt_migrate_readonly_property))
Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadonlyProperty;
if (Args.hasArg(OPT_objcmt_migrate_readwrite_property))
Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadwriteProperty;
if (Args.hasArg(OPT_objcmt_migrate_annotation))
Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Annotation;
if (Args.hasArg(OPT_objcmt_returns_innerpointer_property))
Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReturnsInnerPointerProperty;
if (Args.hasArg(OPT_objcmt_migrate_instancetype))
Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Instancetype;
if (Args.hasArg(OPT_objcmt_migrate_nsmacros))
Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsMacros;
if (Args.hasArg(OPT_objcmt_migrate_protocol_conformance))
Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ProtocolConformance;
if (Args.hasArg(OPT_objcmt_atomic_property))
Opts.ObjCMTAction |= FrontendOptions::ObjCMT_AtomicProperty;
if (Args.hasArg(OPT_objcmt_ns_nonatomic_iosonly))
Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsAtomicIOSOnlyProperty;
if (Args.hasArg(OPT_objcmt_migrate_designated_init))
Opts.ObjCMTAction |= FrontendOptions::ObjCMT_DesignatedInitializer;
if (Args.hasArg(OPT_objcmt_migrate_all))
Opts.ObjCMTAction |= FrontendOptions::ObjCMT_MigrateDecls;
Opts.ObjCMTWhiteListPath = Args.getLastArgValue(OPT_objcmt_whitelist_dir_path);
if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
Diags.Report(diag::err_drv_argument_not_allowed_with)
<< "ARC migration" << "ObjC migration";
}
InputKind DashX(InputKind::Unknown);
if (const Arg *A = Args.getLastArg(OPT_x)) {
StringRef XValue = A->getValue();
// Parse suffixes: '<lang>(-header|[-module-map][-cpp-output])'.
// FIXME: Supporting '<lang>-header-cpp-output' would be useful.
bool Preprocessed = XValue.consume_back("-cpp-output");
bool ModuleMap = XValue.consume_back("-module-map");
IsHeaderFile =
!Preprocessed && !ModuleMap && XValue.consume_back("-header");
// Principal languages.
DashX = llvm::StringSwitch<InputKind>(XValue)
.Case("c", InputKind::C)
.Case("cl", InputKind::OpenCL)
.Case("cuda", InputKind::CUDA)
.Case("hip", InputKind::HIP)
.Case("c++", InputKind::CXX)
.Case("objective-c", InputKind::ObjC)
.Case("objective-c++", InputKind::ObjCXX)
.Case("renderscript", InputKind::RenderScript)
.Default(InputKind::Unknown);
// "objc[++]-cpp-output" is an acceptable synonym for
// "objective-c[++]-cpp-output".
if (DashX.isUnknown() && Preprocessed && !IsHeaderFile && !ModuleMap)
DashX = llvm::StringSwitch<InputKind>(XValue)
.Case("objc", InputKind::ObjC)
.Case("objc++", InputKind::ObjCXX)
.Default(InputKind::Unknown);
// Some special cases cannot be combined with suffixes.
if (DashX.isUnknown() && !Preprocessed && !ModuleMap && !IsHeaderFile)
DashX = llvm::StringSwitch<InputKind>(XValue)
.Case("cpp-output", InputKind(InputKind::C).getPreprocessed())
.Case("assembler-with-cpp", InputKind::Asm)
.Cases("ast", "pcm",
InputKind(InputKind::Unknown, InputKind::Precompiled))
.Case("ir", InputKind::LLVM_IR)
.Default(InputKind::Unknown);
if (DashX.isUnknown())
Diags.Report(diag::err_drv_invalid_value)
<< A->getAsString(Args) << A->getValue();
if (Preprocessed)
DashX = DashX.getPreprocessed();
if (ModuleMap)
DashX = DashX.withFormat(InputKind::ModuleMap);
}
// '-' is the default input if none is given.
std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
Opts.Inputs.clear();
if (Inputs.empty())
Inputs.push_back("-");
for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
InputKind IK = DashX;
if (IK.isUnknown()) {
IK = FrontendOptions::getInputKindForExtension(
StringRef(Inputs[i]).rsplit('.').second);
// FIXME: Warn on this?
if (IK.isUnknown())
IK = InputKind::C;
// FIXME: Remove this hack.
if (i == 0)
DashX = IK;
}
// The -emit-module action implicitly takes a module map.
if (Opts.ProgramAction == frontend::GenerateModule &&
IK.getFormat() == InputKind::Source)
IK = IK.withFormat(InputKind::ModuleMap);
Opts.Inputs.emplace_back(std::move(Inputs[i]), IK);
}
return DashX;
}
std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
void *MainAddr) {
std::string ClangExecutable =
llvm::sys::fs::getMainExecutable(Argv0, MainAddr);
StringRef Dir = llvm::sys::path::parent_path(ClangExecutable);
// Compute the path to the resource directory.
StringRef ClangResourceDir(CLANG_RESOURCE_DIR);
SmallString<128> P(Dir);
if (ClangResourceDir != "")
llvm::sys::path::append(P, ClangResourceDir);
else
llvm::sys::path::append(P, "..", Twine("lib") + CLANG_LIBDIR_SUFFIX,
"clang", CLANG_VERSION_STRING);
return P.str();
}
static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args,
const std::string &WorkingDir) {
Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
Opts.Verbose = Args.hasArg(OPT_v);
Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
// Canonicalize -fmodules-cache-path before storing it.
SmallString<128> P(Args.getLastArgValue(OPT_fmodules_cache_path));
if (!(P.empty() || llvm::sys::path::is_absolute(P))) {
if (WorkingDir.empty())
llvm::sys::fs::make_absolute(P);
else
llvm::sys::fs::make_absolute(WorkingDir, P);
}
llvm::sys::path::remove_dots(P);
Opts.ModuleCachePath = P.str();
Opts.ModuleUserBuildPath = Args.getLastArgValue(OPT_fmodules_user_build_path);
// Only the -fmodule-file=<name>=<file> form.
for (const auto *A : Args.filtered(OPT_fmodule_file)) {
StringRef Val = A->getValue();
if (Val.find('=') != StringRef::npos)
Opts.PrebuiltModuleFiles.insert(Val.split('='));
}
for (const auto *A : Args.filtered(OPT_fprebuilt_module_path))
Opts.AddPrebuiltModulePath(A->getValue());
Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
Opts.ModulesHashContent = Args.hasArg(OPT_fmodules_hash_content);
Opts.ModulesValidateDiagnosticOptions =
!Args.hasArg(OPT_fmodules_disable_diagnostic_validation);
Opts.ImplicitModuleMaps = Args.hasArg(OPT_fimplicit_module_maps);
Opts.ModuleMapFileHomeIsCwd = Args.hasArg(OPT_fmodule_map_file_home_is_cwd);
Opts.ModuleCachePruneInterval =
getLastArgIntValue(Args, OPT_fmodules_prune_interval, 7 * 24 * 60 * 60);
Opts.ModuleCachePruneAfter =
getLastArgIntValue(Args, OPT_fmodules_prune_after, 31 * 24 * 60 * 60);
Opts.ModulesValidateOncePerBuildSession =
Args.hasArg(OPT_fmodules_validate_once_per_build_session);
Opts.BuildSessionTimestamp =
getLastArgUInt64Value(Args, OPT_fbuild_session_timestamp, 0);
Opts.ModulesValidateSystemHeaders =
Args.hasArg(OPT_fmodules_validate_system_headers);
if (const Arg *A = Args.getLastArg(OPT_fmodule_format_EQ))
Opts.ModuleFormat = A->getValue();
for (const auto *A : Args.filtered(OPT_fmodules_ignore_macro)) {
StringRef MacroDef = A->getValue();
Opts.ModulesIgnoreMacros.insert(
llvm::CachedHashString(MacroDef.split('=').first));
}
// Add -I..., -F..., and -index-header-map options in order.
bool IsIndexHeaderMap = false;
bool IsSysrootSpecified =
Args.hasArg(OPT__sysroot_EQ) || Args.hasArg(OPT_isysroot);
for (const auto *A : Args.filtered(OPT_I, OPT_F, OPT_index_header_map)) {
if (A->getOption().matches(OPT_index_header_map)) {
// -index-header-map applies to the next -I or -F.
IsIndexHeaderMap = true;
continue;
}
frontend::IncludeDirGroup Group =
IsIndexHeaderMap ? frontend::IndexHeaderMap : frontend::Angled;
bool IsFramework = A->getOption().matches(OPT_F);
std::string Path = A->getValue();
if (IsSysrootSpecified && !IsFramework && A->getValue()[0] == '=') {
SmallString<32> Buffer;
llvm::sys::path::append(Buffer, Opts.Sysroot,
llvm::StringRef(A->getValue()).substr(1));
Path = Buffer.str();
}
Opts.AddPath(Path, Group, IsFramework,
/*IgnoreSysroot*/ true);
IsIndexHeaderMap = false;
}
// Add -iprefix/-iwithprefix/-iwithprefixbefore options.
StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
for (const auto *A :
Args.filtered(OPT_iprefix, OPT_iwithprefix, OPT_iwithprefixbefore)) {
if (A->getOption().matches(OPT_iprefix))
Prefix = A->getValue();
else if (A->getOption().matches(OPT_iwithprefix))
Opts.AddPath(Prefix.str() + A->getValue(), frontend::After, false, true);
else
Opts.AddPath(Prefix.str() + A->getValue(), frontend::Angled, false, true);
}
for (const auto *A : Args.filtered(OPT_idirafter))
Opts.AddPath(A->getValue(), frontend::After, false, true);
for (const auto *A : Args.filtered(OPT_iquote))
Opts.AddPath(A->getValue(), frontend::Quoted, false, true);
for (const auto *A : Args.filtered(OPT_isystem, OPT_iwithsysroot))
Opts.AddPath(A->getValue(), frontend::System, false,
!A->getOption().matches(OPT_iwithsysroot));
for (const auto *A : Args.filtered(OPT_iframework))
Opts.AddPath(A->getValue(), frontend::System, true, true);
for (const auto *A : Args.filtered(OPT_iframeworkwithsysroot))
Opts.AddPath(A->getValue(), frontend::System, /*IsFramework=*/true,
/*IgnoreSysRoot=*/false);
// Add the paths for the various language specific isystem flags.
for (const auto *A : Args.filtered(OPT_c_isystem))
Opts.AddPath(A->getValue(), frontend::CSystem, false, true);
for (const auto *A : Args.filtered(OPT_cxx_isystem))
Opts.AddPath(A->getValue(), frontend::CXXSystem, false, true);
for (const auto *A : Args.filtered(OPT_objc_isystem))
Opts.AddPath(A->getValue(), frontend::ObjCSystem, false,true);
for (const auto *A : Args.filtered(OPT_objcxx_isystem))
Opts.AddPath(A->getValue(), frontend::ObjCXXSystem, false, true);
// Add the internal paths from a driver that detects standard include paths.
for (const auto *A :
Args.filtered(OPT_internal_isystem, OPT_internal_externc_isystem)) {
frontend::IncludeDirGroup Group = frontend::System;
if (A->getOption().matches(OPT_internal_externc_isystem))
Group = frontend::ExternCSystem;
Opts.AddPath(A->getValue(), Group, false, true);
}
// Add the path prefixes which are implicitly treated as being system headers.
for (const auto *A :
Args.filtered(OPT_system_header_prefix, OPT_no_system_header_prefix))
Opts.AddSystemHeaderPrefix(
A->getValue(), A->getOption().matches(OPT_system_header_prefix));
for (const auto *A : Args.filtered(OPT_ivfsoverlay))
Opts.AddVFSOverlayFile(A->getValue());
}
void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
const llvm::Triple &T,
PreprocessorOptions &PPOpts,
LangStandard::Kind LangStd) {
// Set some properties which depend solely on the input kind; it would be nice
// to move these to the language standard, and have the driver resolve the
// input kind + language standard.
//
// FIXME: Perhaps a better model would be for a single source file to have
// multiple language standards (C / C++ std, ObjC std, OpenCL std, OpenMP std)
// simultaneously active?
if (IK.getLanguage() == InputKind::Asm) {
Opts.AsmPreprocessor = 1;
} else if (IK.isObjectiveC()) {
Opts.ObjC = 1;
}
if (LangStd == LangStandard::lang_unspecified) {
// Based on the base language, pick one.
switch (IK.getLanguage()) {
case InputKind::Unknown:
case InputKind::LLVM_IR:
llvm_unreachable("Invalid input kind!");
case InputKind::OpenCL:
LangStd = LangStandard::lang_opencl10;
break;
case InputKind::CUDA:
LangStd = LangStandard::lang_cuda;
break;
case InputKind::Asm:
case InputKind::C:
#if defined(CLANG_DEFAULT_STD_C)
LangStd = CLANG_DEFAULT_STD_C;
#else
// The PS4 uses C99 as the default C standard.
if (T.isPS4())
LangStd = LangStandard::lang_gnu99;
else
LangStd = LangStandard::lang_gnu11;
#endif
break;
case InputKind::ObjC:
#if defined(CLANG_DEFAULT_STD_C)
LangStd = CLANG_DEFAULT_STD_C;
#else
LangStd = LangStandard::lang_gnu11;
#endif
break;
case InputKind::CXX:
case InputKind::ObjCXX:
#if defined(CLANG_DEFAULT_STD_CXX)
LangStd = CLANG_DEFAULT_STD_CXX;
#else
LangStd = LangStandard::lang_gnucxx14;
#endif
break;
case InputKind::RenderScript:
LangStd = LangStandard::lang_c99;
break;
case InputKind::HIP:
LangStd = LangStandard::lang_hip;
break;
}
}
const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
Opts.LineComment = Std.hasLineComments();
Opts.C99 = Std.isC99();
Opts.C11 = Std.isC11();
Opts.C17 = Std.isC17();
Opts.CPlusPlus = Std.isCPlusPlus();
Opts.CPlusPlus11 = Std.isCPlusPlus11();
Opts.CPlusPlus14 = Std.isCPlusPlus14();
Opts.CPlusPlus17 = Std.isCPlusPlus17();
Opts.CPlusPlus2a = Std.isCPlusPlus2a();
Opts.Digraphs = Std.hasDigraphs();
Opts.GNUMode = Std.isGNUMode();
Opts.GNUInline = !Opts.C99 && !Opts.CPlusPlus;
Opts.HexFloats = Std.hasHexFloats();
Opts.ImplicitInt = Std.hasImplicitInt();
// Set OpenCL Version.
Opts.OpenCL = Std.isOpenCL();
if (LangStd == LangStandard::lang_opencl10)
Opts.OpenCLVersion = 100;
else if (LangStd == LangStandard::lang_opencl11)
Opts.OpenCLVersion = 110;
else if (LangStd == LangStandard::lang_opencl12)
Opts.OpenCLVersion = 120;
else if (LangStd == LangStandard::lang_opencl20)
Opts.OpenCLVersion = 200;
else if (LangStd == LangStandard::lang_openclcpp)
Opts.OpenCLCPlusPlusVersion = 100;
// OpenCL has some additional defaults.
if (Opts.OpenCL) {
Opts.AltiVec = 0;
Opts.ZVector = 0;
Opts.LaxVectorConversions = 0;
Opts.setDefaultFPContractMode(LangOptions::FPC_On);
Opts.NativeHalfType = 1;
Opts.NativeHalfArgsAndReturns = 1;
Opts.OpenCLCPlusPlus = Opts.CPlusPlus;
// Include default header file for OpenCL.
if (Opts.IncludeDefaultHeader) {
PPOpts.Includes.push_back("opencl-c.h");
}
}
Opts.HIP = IK.getLanguage() == InputKind::HIP;
Opts.CUDA = IK.getLanguage() == InputKind::CUDA || Opts.HIP;
if (Opts.CUDA)
// Set default FP_CONTRACT to FAST.
Opts.setDefaultFPContractMode(LangOptions::FPC_Fast);
Opts.RenderScript = IK.getLanguage() == InputKind::RenderScript;
if (Opts.RenderScript) {
Opts.NativeHalfType = 1;
Opts.NativeHalfArgsAndReturns = 1;
}
// OpenCL and C++ both have bool, true, false keywords.
Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
// OpenCL has half keyword
Opts.Half = Opts.OpenCL;
// C++ has wchar_t keyword.
Opts.WChar = Opts.CPlusPlus;
Opts.GNUKeywords = Opts.GNUMode;
Opts.CXXOperatorNames = Opts.CPlusPlus;
Opts.AlignedAllocation = Opts.CPlusPlus17;
Opts.DollarIdents = !Opts.AsmPreprocessor;
}
/// Attempt to parse a visibility value out of the given argument.
static Visibility parseVisibility(Arg *arg, ArgList &args,
DiagnosticsEngine &diags) {
StringRef value = arg->getValue();
if (value == "default") {
return DefaultVisibility;
} else if (value == "hidden" || value == "internal") {
return HiddenVisibility;
} else if (value == "protected") {
// FIXME: diagnose if target does not support protected visibility
return ProtectedVisibility;
}
diags.Report(diag::err_drv_invalid_value)
<< arg->getAsString(args) << value;
return DefaultVisibility;
}
/// Check if input file kind and language standard are compatible.
static bool IsInputCompatibleWithStandard(InputKind IK,
const LangStandard &S) {
switch (IK.getLanguage()) {
case InputKind::Unknown:
case InputKind::LLVM_IR:
llvm_unreachable("should not parse language flags for this input");
case InputKind::C:
case InputKind::ObjC:
case InputKind::RenderScript:
return S.getLanguage() == InputKind::C;
case InputKind::OpenCL:
return S.getLanguage() == InputKind::OpenCL;
case InputKind::CXX:
case InputKind::ObjCXX:
return S.getLanguage() == InputKind::CXX;
case InputKind::CUDA:
// FIXME: What -std= values should be permitted for CUDA compilations?
return S.getLanguage() == InputKind::CUDA ||
S.getLanguage() == InputKind::CXX;
case InputKind::HIP:
return S.getLanguage() == InputKind::CXX ||
S.getLanguage() == InputKind::HIP;
case InputKind::Asm:
// Accept (and ignore) all -std= values.
// FIXME: The -std= value is not ignored; it affects the tokenization
// and preprocessing rules if we're preprocessing this asm input.
return true;
}
llvm_unreachable("unexpected input language");
}
/// Get language name for given input kind.
static const StringRef GetInputKindName(InputKind IK) {
switch (IK.getLanguage()) {
case InputKind::C:
return "C";
case InputKind::ObjC:
return "Objective-C";
case InputKind::CXX:
return "C++";
case InputKind::ObjCXX:
return "Objective-C++";
case InputKind::OpenCL:
return "OpenCL";
case InputKind::CUDA:
return "CUDA";
case InputKind::RenderScript:
return "RenderScript";
case InputKind::HIP:
return "HIP";
case InputKind::Asm:
return "Asm";
case InputKind::LLVM_IR:
return "LLVM IR";
case InputKind::Unknown:
break;
}
llvm_unreachable("unknown input language");
}
static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
const TargetOptions &TargetOpts,
PreprocessorOptions &PPOpts,
DiagnosticsEngine &Diags) {
// FIXME: Cleanup per-file based stuff.
LangStandard::Kind LangStd = LangStandard::lang_unspecified;
if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
#define LANGSTANDARD(id, name, lang, desc, features) \
.Case(name, LangStandard::lang_##id)
#define LANGSTANDARD_ALIAS(id, alias) \
.Case(alias, LangStandard::lang_##id)
#include "clang/Frontend/LangStandards.def"
.Default(LangStandard::lang_unspecified);
if (LangStd == LangStandard::lang_unspecified) {
Diags.Report(diag::err_drv_invalid_value)
<< A->getAsString(Args) << A->getValue();
// Report supported standards with short description.
for (unsigned KindValue = 0;
KindValue != LangStandard::lang_unspecified;
++KindValue) {
const LangStandard &Std = LangStandard::getLangStandardForKind(
static_cast<LangStandard::Kind>(KindValue));
if (IsInputCompatibleWithStandard(IK, Std)) {
auto Diag = Diags.Report(diag::note_drv_use_standard);
Diag << Std.getName() << Std.getDescription();
unsigned NumAliases = 0;
#define LANGSTANDARD(id, name, lang, desc, features)
#define LANGSTANDARD_ALIAS(id, alias) \
if (KindValue == LangStandard::lang_##id) ++NumAliases;
#define LANGSTANDARD_ALIAS_DEPR(id, alias)
#include "clang/Frontend/LangStandards.def"
Diag << NumAliases;
#define LANGSTANDARD(id, name, lang, desc, features)
#define LANGSTANDARD_ALIAS(id, alias) \
if (KindValue == LangStandard::lang_##id) Diag << alias;
#define LANGSTANDARD_ALIAS_DEPR(id, alias)
#include "clang/Frontend/LangStandards.def"
}
}
} else {
// Valid standard, check to make sure language and standard are
// compatible.
const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
if (!IsInputCompatibleWithStandard(IK, Std)) {
Diags.Report(diag::err_drv_argument_not_allowed_with)
<< A->getAsString(Args) << GetInputKindName(IK);
}
}
}
if (Args.hasArg(OPT_fno_dllexport_inlines))
Opts.DllExportInlines = false;
if (const Arg *A = Args.getLastArg(OPT_fcf_protection_EQ)) {
StringRef Name = A->getValue();
if (Name == "full" || Name == "branch") {
Opts.CFProtectionBranch = 1;
}
}
// -cl-std only applies for OpenCL language standards.
// Override the -std option in this case.
if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
LangStandard::Kind OpenCLLangStd
= llvm::StringSwitch<LangStandard::Kind>(A->getValue())
.Cases("cl", "CL", LangStandard::lang_opencl10)
.Cases("cl1.1", "CL1.1", LangStandard::lang_opencl11)
.Cases("cl1.2", "CL1.2", LangStandard::lang_opencl12)
.Cases("cl2.0", "CL2.0", LangStandard::lang_opencl20)
.Case("c++", LangStandard::lang_openclcpp)
.Default(LangStandard::lang_unspecified);
if (OpenCLLangStd == LangStandard::lang_unspecified) {
Diags.Report(diag::err_drv_invalid_value)
<< A->getAsString(Args) << A->getValue();
}
else
LangStd = OpenCLLangStd;
}
Opts.IncludeDefaultHeader = Args.hasArg(OPT_finclude_default_header);
llvm::Triple T(TargetOpts.Triple);
CompilerInvocation::setLangDefaults(Opts, IK, T, PPOpts, LangStd);
// -cl-strict-aliasing needs to emit diagnostic in the case where CL > 1.0.
// This option should be deprecated for CL > 1.0 because
// this option was added for compatibility with OpenCL 1.0.
if (Args.getLastArg(OPT_cl_strict_aliasing)
&& Opts.OpenCLVersion > 100) {
Diags.Report(diag::warn_option_invalid_ocl_version)
<< Opts.getOpenCLVersionTuple().getAsString()
<< Args.getLastArg(OPT_cl_strict_aliasing)->getAsString(Args);
}
// We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
// keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
// while a subset (the non-C++ GNU keywords) is provided by GCC's
// '-fgnu-keywords'. Clang conflates the two for simplicity under the single
// name, as it doesn't seem a useful distinction.
Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
Opts.GNUKeywords);
Opts.Digraphs = Args.hasFlag(OPT_fdigraphs, OPT_fno_digraphs, Opts.Digraphs);
if (Args.hasArg(OPT_fno_operator_names))
Opts.CXXOperatorNames = 0;
if (Args.hasArg(OPT_fcuda_is_device))
Opts.CUDAIsDevice = 1;
if (Args.hasArg(OPT_fcuda_allow_variadic_functions))
Opts.CUDAAllowVariadicFunctions = 1;
if (Args.hasArg(OPT_fno_cuda_host_device_constexpr))
Opts.CUDAHostDeviceConstexpr = 0;
if (Opts.CUDAIsDevice && Args.hasArg(OPT_fcuda_approx_transcendentals))
Opts.CUDADeviceApproxTranscendentals = 1;
Opts.GPURelocatableDeviceCode = Args.hasArg(OPT_fgpu_rdc);
if (Opts.ObjC) {
if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
StringRef value = arg->getValue();
if (Opts.ObjCRuntime.tryParse(value))
Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
}
if (Args.hasArg(OPT_fobjc_gc_only))
Opts.setGC(LangOptions::GCOnly);
else if (Args.hasArg(OPT_fobjc_gc))
Opts.setGC(LangOptions::HybridGC);
else if (Args.hasArg(OPT_fobjc_arc)) {
Opts.ObjCAutoRefCount = 1;
if (!Opts.ObjCRuntime.allowsARC())
Diags.Report(diag::err_arc_unsupported_on_runtime);
}
// ObjCWeakRuntime tracks whether the runtime supports __weak, not
// whether the feature is actually enabled. This is predominantly
// determined by -fobjc-runtime, but we allow it to be overridden
// from the command line for testing purposes.
if (Args.hasArg(OPT_fobjc_runtime_has_weak))
Opts.ObjCWeakRuntime = 1;
else
Opts.ObjCWeakRuntime = Opts.ObjCRuntime.allowsWeak();
// ObjCWeak determines whether __weak is actually enabled.
// Note that we allow -fno-objc-weak to disable this even in ARC mode.
if (auto weakArg = Args.getLastArg(OPT_fobjc_weak, OPT_fno_objc_weak)) {
if (!weakArg->getOption().matches(OPT_fobjc_weak)) {
assert(!Opts.ObjCWeak);
} else if (Opts.getGC() != LangOptions::NonGC) {
Diags.Report(diag::err_objc_weak_with_gc);
} else if (!Opts.ObjCWeakRuntime) {
Diags.Report(diag::err_objc_weak_unsupported);
} else {
Opts.ObjCWeak = 1;
}
} else if (Opts.ObjCAutoRefCount) {
Opts.ObjCWeak = Opts.ObjCWeakRuntime;
}
if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
Opts.ObjCInferRelatedResultType = 0;
if (Args.hasArg(OPT_fobjc_subscripting_legacy_runtime))
Opts.ObjCSubscriptingLegacyRuntime =
(Opts.ObjCRuntime.getKind() == ObjCRuntime::FragileMacOSX);
}
if (Args.hasArg(OPT_fgnu89_inline)) {
if (Opts.CPlusPlus)
Diags.Report(diag::err_drv_argument_not_allowed_with)
<< "-fgnu89-inline" << GetInputKindName(IK);
else
Opts.GNUInline = 1;
}
if (Args.hasArg(OPT_fapple_kext)) {
if (!Opts.CPlusPlus)
Diags.Report(diag::warn_c_kext);
else
Opts.AppleKext = 1;
}
if (Args.hasArg(OPT_print_ivar_layout))
Opts.ObjCGCBitmapPrint = 1;
if (Args.hasArg(OPT_fno_constant_cfstrings))
Opts.NoConstantCFStrings = 1;
if (const auto *A = Args.getLastArg(OPT_fcf_runtime_abi_EQ))
Opts.CFRuntime =
llvm::StringSwitch<LangOptions::CoreFoundationABI>(A->getValue())
.Cases("unspecified", "standalone", "objc",
LangOptions::CoreFoundationABI::ObjectiveC)
.Cases("swift", "swift-5.0",
LangOptions::CoreFoundationABI::Swift5_0)
.Case("swift-4.2", LangOptions::CoreFoundationABI::Swift4_2)
.Case("swift-4.1", LangOptions::CoreFoundationABI::Swift4_1)
.Default(LangOptions::CoreFoundationABI::ObjectiveC);
if (Args.hasArg(OPT_fzvector))
Opts.ZVector = 1;
if (Args.hasArg(OPT_pthread))
Opts.POSIXThreads = 1;
// The value-visibility mode defaults to "default".
if (Arg *visOpt = Args.getLastArg(OPT_fvisibility)) {
Opts.setValueVisibilityMode(parseVisibility(visOpt, Args, Diags));
} else {
Opts.setValueVisibilityMode(DefaultVisibility);
}
// The type-visibility mode defaults to the value-visibility mode.
if (Arg *typeVisOpt = Args.getLastArg(OPT_ftype_visibility)) {
Opts.setTypeVisibilityMode(parseVisibility(typeVisOpt, Args, Diags));
} else {
Opts.setTypeVisibilityMode(Opts.getValueVisibilityMode());
}
if (Args.hasArg(OPT_fvisibility_inlines_hidden))
Opts.InlineVisibilityHidden = 1;
if (Args.hasArg(OPT_fvisibility_global_new_delete_hidden))
Opts.GlobalAllocationFunctionVisibilityHidden = 1;
if (Args.hasArg(OPT_ftrapv)) {
Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
// Set the handler, if one is specified.
Opts.OverflowHandler =
Args.getLastArgValue(OPT_ftrapv_handler);
}
else if (Args.hasArg(OPT_fwrapv))
Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
Opts.MSVCCompat = Args.hasArg(OPT_fms_compatibility);
Opts.MicrosoftExt = Opts.MSVCCompat || Args.hasArg(OPT_fms_extensions);
Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
Opts.MSCompatibilityVersion = 0;
if (const Arg *A = Args.getLastArg(OPT_fms_compatibility_version)) {
VersionTuple VT;
if (VT.tryParse(A->getValue()))
Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
<< A->getValue();
Opts.MSCompatibilityVersion = VT.getMajor() * 10000000 +
VT.getMinor().getValueOr(0) * 100000 +
VT.getSubminor().getValueOr(0);
}
// Mimicking gcc's behavior, trigraphs are only enabled if -trigraphs
// is specified, or -std is set to a conforming mode.
// Trigraphs are disabled by default in c++1z onwards.
Opts.Trigraphs = !Opts.GNUMode && !Opts.MSVCCompat && !Opts.CPlusPlus17;
Opts.Trigraphs =
Args.hasFlag(OPT_ftrigraphs, OPT_fno_trigraphs, Opts.Trigraphs);
Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
OPT_fno_dollars_in_identifiers,
Opts.DollarIdents);
Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
Opts.VtorDispMode = getLastArgIntValue(Args, OPT_vtordisp_mode_EQ, 1, Diags);
Opts.Borland = Args.hasArg(OPT_fborland_extensions);
Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
Opts.ConstStrings);
if (Args.hasArg(OPT_fno_lax_vector_conversions))
Opts.LaxVectorConversions = 0;
if (Args.hasArg(OPT_fno_threadsafe_statics))
Opts.ThreadsafeStatics = 0;
Opts.Exceptions = Args.hasArg(OPT_fexceptions);
Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
// -ffixed-point
Opts.FixedPoint =
Args.hasFlag(OPT_ffixed_point, OPT_fno_fixed_point, /*Default=*/false) &&
!Opts.CPlusPlus;
Opts.PaddingOnUnsignedFixedPoint =
Args.hasFlag(OPT_fpadding_on_unsigned_fixed_point,
OPT_fno_padding_on_unsigned_fixed_point,
/*Default=*/false) &&
Opts.FixedPoint;
// Handle exception personalities
Arg *A = Args.getLastArg(options::OPT_fsjlj_exceptions,
options::OPT_fseh_exceptions,
options::OPT_fdwarf_exceptions);
if (A) {
const Option &Opt = A->getOption();
llvm::Triple T(TargetOpts.Triple);
if (T.isWindowsMSVCEnvironment())
Diags.Report(diag::err_fe_invalid_exception_model)
<< Opt.getName() << T.str();
Opts.SjLjExceptions = Opt.matches(options::OPT_fsjlj_exceptions);
Opts.SEHExceptions = Opt.matches(options::OPT_fseh_exceptions);
Opts.DWARFExceptions = Opt.matches(options::OPT_fdwarf_exceptions);
}
Opts.ExternCNoUnwind = Args.hasArg(OPT_fexternc_nounwind);
Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
Opts.RTTI = Opts.CPlusPlus && !Args.hasArg(OPT_fno_rtti);
Opts.RTTIData = Opts.RTTI && !Args.hasArg(OPT_fno_rtti_data);
Opts.Blocks = Args.hasArg(OPT_fblocks) || (Opts.OpenCL
&& Opts.OpenCLVersion == 200);
Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
Opts.CoroutinesTS = Args.hasArg(OPT_fcoroutines_ts);
// Enable [[]] attributes in C++11 by default.
Opts.DoubleSquareBracketAttributes =
Args.hasFlag(OPT_fdouble_square_bracket_attributes,
OPT_fno_double_square_bracket_attributes, Opts.CPlusPlus11);
Opts.ModulesTS = Args.hasArg(OPT_fmodules_ts);
Opts.Modules = Args.hasArg(OPT_fmodules) || Opts.ModulesTS;
Opts.ModulesStrictDeclUse = Args.hasArg(OPT_fmodules_strict_decluse);
Opts.ModulesDeclUse =
Args.hasArg(OPT_fmodules_decluse) || Opts.ModulesStrictDeclUse;
Opts.ModulesLocalVisibility =
Args.hasArg(OPT_fmodules_local_submodule_visibility) || Opts.ModulesTS;
Opts.ModulesCodegen = Args.hasArg(OPT_fmodules_codegen);
Opts.ModulesDebugInfo = Args.hasArg(OPT_fmodules_debuginfo);
Opts.ModulesSearchAll = Opts.Modules &&
!Args.hasArg(OPT_fno_modules_search_all) &&
Args.hasArg(OPT_fmodules_search_all);
Opts.ModulesErrorRecovery = !Args.hasArg(OPT_fno_modules_error_recovery);
Opts.ImplicitModules = !Args.hasArg(OPT_fno_implicit_modules);
Opts.CharIsSigned = Opts.OpenCL || !Args.hasArg(OPT_fno_signed_char);
Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
Opts.Char8 = Args.hasFlag(OPT_fchar8__t, OPT_fno_char8__t, Opts.CPlusPlus2a);
if (const Arg *A = Args.getLastArg(OPT_fwchar_type_EQ)) {
Opts.WCharSize = llvm::StringSwitch<unsigned>(A->getValue())
.Case("char", 1)
.Case("short", 2)
.Case("int", 4)
.Default(0);
if (Opts.WCharSize == 0)
Diags.Report(diag::err_fe_invalid_wchar_type) << A->getValue();
}
Opts.WCharIsSigned = Args.hasFlag(OPT_fsigned_wchar, OPT_fno_signed_wchar, true);
Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
if (!Opts.NoBuiltin)
getAllNoBuiltinFuncValues(Args, Opts.NoBuiltinFuncs);
Opts.NoMathBuiltin = Args.hasArg(OPT_fno_math_builtin);
Opts.RelaxedTemplateTemplateArgs =
Args.hasArg(OPT_frelaxed_template_template_args);
Opts.SizedDeallocation = Args.hasArg(OPT_fsized_deallocation);
Opts.AlignedAllocation =
Args.hasFlag(OPT_faligned_allocation, OPT_fno_aligned_allocation,
Opts.AlignedAllocation);
Opts.AlignedAllocationUnavailable =
Opts.AlignedAllocation && Args.hasArg(OPT_aligned_alloc_unavailable);
Opts.NewAlignOverride =
getLastArgIntValue(Args, OPT_fnew_alignment_EQ, 0, Diags);
if (Opts.NewAlignOverride && !llvm::isPowerOf2_32(Opts.NewAlignOverride)) {
Arg *A = Args.getLastArg(OPT_fnew_alignment_EQ);
Diags.Report(diag::err_fe_invalid_alignment) << A->getAsString(Args)
<< A->getValue();
Opts.NewAlignOverride = 0;
}
Opts.ConceptsTS = Args.hasArg(OPT_fconcepts_ts);
Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
Opts.MathErrno = !Opts.OpenCL && Args.hasArg(OPT_fmath_errno);
Opts.InstantiationDepth =
getLastArgIntValue(Args, OPT_ftemplate_depth, 1024, Diags);
Opts.ArrowDepth =
getLastArgIntValue(Args, OPT_foperator_arrow_depth, 256, Diags);
Opts.ConstexprCallDepth =
getLastArgIntValue(Args, OPT_fconstexpr_depth, 512, Diags);
Opts.ConstexprStepLimit =
getLastArgIntValue(Args, OPT_fconstexpr_steps, 1048576, Diags);
Opts.BracketDepth = getLastArgIntValue(Args, OPT_fbracket_depth, 256, Diags);
Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
Opts.NumLargeByValueCopy =
getLastArgIntValue(Args, OPT_Wlarge_by_value_copy_EQ, 0, Diags);
Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
Opts.ObjCConstantStringClass =
Args.getLastArgValue(OPT_fconstant_string_class);
Opts.ObjCDefaultSynthProperties =
!Args.hasArg(OPT_disable_objc_default_synthesize_properties);
Opts.EncodeExtendedBlockSig =
Args.hasArg(OPT_fencode_extended_block_signature);
Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
Opts.PackStruct = getLastArgIntValue(Args, OPT_fpack_struct_EQ, 0, Diags);
Opts.MaxTypeAlign = getLastArgIntValue(Args, OPT_fmax_type_align_EQ, 0, Diags);
Opts.AlignDouble = Args.hasArg(OPT_malign_double);
Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
Opts.PIE = Args.hasArg(OPT_pic_is_pie);
Opts.Static = Args.hasArg(OPT_static_define);
Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
|| Args.hasArg(OPT_fdump_record_layouts);
Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
Opts.ModuleName = Args.getLastArgValue(OPT_fmodule_name_EQ);
Opts.CurrentModule = Opts.ModuleName;
Opts.AppExt = Args.hasArg(OPT_fapplication_extension);
Opts.ModuleFeatures = Args.getAllArgValues(OPT_fmodule_feature);
llvm::sort(Opts.ModuleFeatures);
Opts.NativeHalfType |= Args.hasArg(OPT_fnative_half_type);
Opts.NativeHalfArgsAndReturns |= Args.hasArg(OPT_fnative_half_arguments_and_returns);
// Enable HalfArgsAndReturns if present in Args or if NativeHalfArgsAndReturns
// is enabled.
Opts.HalfArgsAndReturns = Args.hasArg(OPT_fallow_half_arguments_and_returns)
| Opts.NativeHalfArgsAndReturns;
Opts.GNUAsm = !Args.hasArg(OPT_fno_gnu_inline_asm);
// __declspec is enabled by default for the PS4 by the driver, and also
// enabled for Microsoft Extensions or Borland Extensions, here.
//
// FIXME: __declspec is also currently enabled for CUDA, but isn't really a
// CUDA extension. However, it is required for supporting
// __clang_cuda_builtin_vars.h, which uses __declspec(property). Once that has
// been rewritten in terms of something more generic, remove the Opts.CUDA
// term here.
Opts.DeclSpecKeyword =
Args.hasFlag(OPT_fdeclspec, OPT_fno_declspec,
(Opts.MicrosoftExt || Opts.Borland || Opts.CUDA));
if (Arg *A = Args.getLastArg(OPT_faddress_space_map_mangling_EQ)) {
switch (llvm::StringSwitch<unsigned>(A->getValue())
.Case("target", LangOptions::ASMM_Target)
.Case("no", LangOptions::ASMM_Off)
.Case("yes", LangOptions::ASMM_On)
.Default(255)) {
default:
Diags.Report(diag::err_drv_invalid_value)
<< "-faddress-space-map-mangling=" << A->getValue();
break;
case LangOptions::ASMM_Target:
Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Target);
break;
case LangOptions::ASMM_On:
Opts.setAddressSpaceMapMangling(LangOptions::ASMM_On);
break;
case LangOptions::ASMM_Off:
Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Off);
break;
}
}
if (Arg *A = Args.getLastArg(OPT_fms_memptr_rep_EQ)) {
LangOptions::PragmaMSPointersToMembersKind InheritanceModel =
llvm::StringSwitch<LangOptions::PragmaMSPointersToMembersKind>(
A->getValue())
.Case("single",
LangOptions::PPTMK_FullGeneralitySingleInheritance)
.Case("multiple",
LangOptions::PPTMK_FullGeneralityMultipleInheritance)
.Case("virtual",
LangOptions::PPTMK_FullGeneralityVirtualInheritance)
.Default(LangOptions::PPTMK_BestCase);
if (InheritanceModel == LangOptions::PPTMK_BestCase)
Diags.Report(diag::err_drv_invalid_value)
<< "-fms-memptr-rep=" << A->getValue();
Opts.setMSPointerToMemberRepresentationMethod(InheritanceModel);
}
// Check for MS default calling conventions being specified.
if (Arg *A = Args.getLastArg(OPT_fdefault_calling_conv_EQ)) {
LangOptions::DefaultCallingConvention DefaultCC =
llvm::StringSwitch<LangOptions::DefaultCallingConvention>(A->getValue())
.Case("cdecl", LangOptions::DCC_CDecl)
.Case("fastcall", LangOptions::DCC_FastCall)
.Case("stdcall", LangOptions::DCC_StdCall)
.Case("vectorcall", LangOptions::DCC_VectorCall)
.Case("regcall", LangOptions::DCC_RegCall)
.Default(LangOptions::DCC_None);
if (DefaultCC == LangOptions::DCC_None)
Diags.Report(diag::err_drv_invalid_value)
<< "-fdefault-calling-conv=" << A->getValue();
llvm::Triple T(TargetOpts.Triple);
llvm::Triple::ArchType Arch = T.getArch();
bool emitError = (DefaultCC == LangOptions::DCC_FastCall ||
DefaultCC == LangOptions::DCC_StdCall) &&
Arch != llvm::Triple::x86;
emitError |= (DefaultCC == LangOptions::DCC_VectorCall ||
DefaultCC == LangOptions::DCC_RegCall) &&
!(Arch == llvm::Triple::x86 || Arch == llvm::Triple::x86_64);
if (emitError)
Diags.Report(diag::err_drv_argument_not_allowed_with)
<< A->getSpelling() << T.getTriple();
else
Opts.setDefaultCallingConv(DefaultCC);
}
// -mrtd option
if (Arg *A = Args.getLastArg(OPT_mrtd)) {
if (Opts.getDefaultCallingConv() != LangOptions::DCC_None)
Diags.Report(diag::err_drv_argument_not_allowed_with)
<< A->getSpelling() << "-fdefault-calling-conv";
else {
llvm::Triple T(TargetOpts.Triple);
if (T.getArch() != llvm::Triple::x86)
Diags.Report(diag::err_drv_argument_not_allowed_with)
<< A->getSpelling() << T.getTriple();
else
Opts.setDefaultCallingConv(LangOptions::DCC_StdCall);
}
}
// Check if -fopenmp is specified.
Opts.OpenMP = Args.hasArg(options::OPT_fopenmp) ? 1 : 0;
// Check if -fopenmp-simd is specified.
bool IsSimdSpecified =
Args.hasFlag(options::OPT_fopenmp_simd, options::OPT_fno_openmp_simd,
/*Default=*/false);
Opts.OpenMPSimd = !Opts.OpenMP && IsSimdSpecified;
Opts.OpenMPUseTLS =
Opts.OpenMP && !Args.hasArg(options::OPT_fnoopenmp_use_tls);
Opts.OpenMPIsDevice =
Opts.OpenMP && Args.hasArg(options::OPT_fopenmp_is_device);
bool IsTargetSpecified =
Opts.OpenMPIsDevice || Args.hasArg(options::OPT_fopenmp_targets_EQ);
if (Opts.OpenMP || Opts.OpenMPSimd) {
if (int Version = getLastArgIntValue(
Args, OPT_fopenmp_version_EQ,
(IsSimdSpecified || IsTargetSpecified) ? 45 : Opts.OpenMP, Diags))
Opts.OpenMP = Version;
else if (IsSimdSpecified || IsTargetSpecified)
Opts.OpenMP = 45;
// Provide diagnostic when a given target is not expected to be an OpenMP
// device or host.
if (!Opts.OpenMPIsDevice) {
switch (T.getArch()) {
default:
break;
// Add unsupported host targets here:
case llvm::Triple::nvptx:
case llvm::Triple::nvptx64:
Diags.Report(diag::err_drv_omp_host_target_not_supported)
<< TargetOpts.Triple;
break;
}
}
}
// Set the flag to prevent the implementation from emitting device exception
// handling code for those requiring so.
Opts.OpenMPHostCXXExceptions = Opts.Exceptions && Opts.CXXExceptions;
if ((Opts.OpenMPIsDevice && T.isNVPTX()) || Opts.OpenCLCPlusPlus) {
Opts.Exceptions = 0;
Opts.CXXExceptions = 0;
}
if (Opts.OpenMPIsDevice && T.isNVPTX()) {
Opts.OpenMPCUDANumSMs =
getLastArgIntValue(Args, options::OPT_fopenmp_cuda_number_of_sm_EQ,
Opts.OpenMPCUDANumSMs, Diags);
Opts.OpenMPCUDABlocksPerSM =
getLastArgIntValue(Args, options::OPT_fopenmp_cuda_blocks_per_sm_EQ,
Opts.OpenMPCUDABlocksPerSM, Diags);
}
// Get the OpenMP target triples if any.
if (Arg *A = Args.getLastArg(options::OPT_fopenmp_targets_EQ)) {
for (unsigned i = 0; i < A->getNumValues(); ++i) {
llvm::Triple TT(A->getValue(i));
if (TT.getArch() == llvm::Triple::UnknownArch ||
!(TT.getArch() == llvm::Triple::ppc ||
TT.getArch() == llvm::Triple::ppc64 ||
TT.getArch() == llvm::Triple::ppc64le ||
TT.getArch() == llvm::Triple::nvptx ||
TT.getArch() == llvm::Triple::nvptx64 ||
TT.getArch() == llvm::Triple::x86 ||
TT.getArch() == llvm::Triple::x86_64))
Diags.Report(diag::err_drv_invalid_omp_target) << A->getValue(i);
else
Opts.OMPTargetTriples.push_back(TT);
}
}
// Get OpenMP host file path if any and report if a non existent file is
// found
if (Arg *A = Args.getLastArg(options::OPT_fopenmp_host_ir_file_path)) {
Opts.OMPHostIRFile = A->getValue();
if (!llvm::sys::fs::exists(Opts.OMPHostIRFile))
Diags.Report(diag::err_drv_omp_host_ir_file_not_found)
<< Opts.OMPHostIRFile;
}
// Set CUDA mode for OpenMP target NVPTX if specified in options
Opts.OpenMPCUDAMode = Opts.OpenMPIsDevice && T.isNVPTX() &&
Args.hasArg(options::OPT_fopenmp_cuda_mode);
// Set CUDA mode for OpenMP target NVPTX if specified in options
Opts.OpenMPCUDAForceFullRuntime =
Opts.OpenMPIsDevice && T.isNVPTX() &&
Args.hasArg(options::OPT_fopenmp_cuda_force_full_runtime);
// Record whether the __DEPRECATED define was requested.
Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
OPT_fno_deprecated_macro,
Opts.Deprecated);
// FIXME: Eliminate this dependency.
unsigned Opt = getOptimizationLevel(Args, IK, Diags),
OptSize = getOptimizationLevelSize(Args);
Opts.Optimize = Opt != 0;
Opts.OptimizeSize = OptSize != 0;
// This is the __NO_INLINE__ define, which just depends on things like the
// optimization level and -fno-inline, not actually whether the backend has
// inlining enabled.
Opts.NoInlineDefine = !Opts.Optimize;
if (Arg *InlineArg = Args.getLastArg(
options::OPT_finline_functions, options::OPT_finline_hint_functions,
options::OPT_fno_inline_functions, options::OPT_fno_inline))
if (InlineArg->getOption().matches(options::OPT_fno_inline))
Opts.NoInlineDefine = true;
Opts.FastMath = Args.hasArg(OPT_ffast_math) ||
Args.hasArg(OPT_cl_fast_relaxed_math);
Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only) ||
Args.hasArg(OPT_cl_finite_math_only) ||
Args.hasArg(OPT_cl_fast_relaxed_math);
Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
Args.hasArg(OPT_cl_fast_relaxed_math);
if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
StringRef Val = A->getValue();
if (Val == "fast")
Opts.setDefaultFPContractMode(LangOptions::FPC_Fast);
else if (Val == "on")
Opts.setDefaultFPContractMode(LangOptions::FPC_On);
else if (Val == "off")
Opts.setDefaultFPContractMode(LangOptions::FPC_Off);
else
Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
}
Opts.RetainCommentsFromSystemHeaders =
Args.hasArg(OPT_fretain_comments_from_system_headers);
unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
switch (SSP) {
default:
Diags.Report(diag::err_drv_invalid_value)
<< Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
break;
case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
case 1: Opts.setStackProtector(LangOptions::SSPOn); break;
case 2: Opts.setStackProtector(LangOptions::SSPStrong); break;
case 3: Opts.setStackProtector(LangOptions::SSPReq); break;
}
if (Arg *A = Args.getLastArg(OPT_ftrivial_auto_var_init)) {
StringRef Val = A->getValue();
if (Val == "uninitialized")
Opts.setTrivialAutoVarInit(
LangOptions::TrivialAutoVarInitKind::Uninitialized);
else if (Val == "zero")
Opts.setTrivialAutoVarInit(LangOptions::TrivialAutoVarInitKind::Zero);
else if (Val == "pattern")
Opts.setTrivialAutoVarInit(LangOptions::TrivialAutoVarInitKind::Pattern);
else
Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
}
// Parse -fsanitize= arguments.
parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
Diags, Opts.Sanitize);
// -fsanitize-address-field-padding=N has to be a LangOpt, parse it here.
Opts.SanitizeAddressFieldPadding =
getLastArgIntValue(Args, OPT_fsanitize_address_field_padding, 0, Diags);
Opts.SanitizerBlacklistFiles = Args.getAllArgValues(OPT_fsanitize_blacklist);
// -fxray-instrument
Opts.XRayInstrument =
Args.hasFlag(OPT_fxray_instrument, OPT_fnoxray_instrument, false);
// -fxray-always-emit-customevents
Opts.XRayAlwaysEmitCustomEvents =
Args.hasFlag(OPT_fxray_always_emit_customevents,
OPT_fnoxray_always_emit_customevents, false);
// -fxray-always-emit-typedevents
Opts.XRayAlwaysEmitTypedEvents =
Args.hasFlag(OPT_fxray_always_emit_typedevents,
OPT_fnoxray_always_emit_customevents, false);
// -fxray-{always,never}-instrument= filenames.
Opts.XRayAlwaysInstrumentFiles =
Args.getAllArgValues(OPT_fxray_always_instrument);
Opts.XRayNeverInstrumentFiles =
Args.getAllArgValues(OPT_fxray_never_instrument);
Opts.XRayAttrListFiles = Args.getAllArgValues(OPT_fxray_attr_list);
// -fforce-emit-vtables
Opts.ForceEmitVTables = Args.hasArg(OPT_fforce_emit_vtables);
// -fallow-editor-placeholders
Opts.AllowEditorPlaceholders = Args.hasArg(OPT_fallow_editor_placeholders);
Opts.RegisterStaticDestructors = !Args.hasArg(OPT_fno_cxx_static_destructors);
if (Arg *A = Args.getLastArg(OPT_fclang_abi_compat_EQ)) {
Opts.setClangABICompat(LangOptions::ClangABI::Latest);
StringRef Ver = A->getValue();
std::pair<StringRef, StringRef> VerParts = Ver.split('.');
unsigned Major, Minor = 0;
// Check the version number is valid: either 3.x (0 <= x <= 9) or
// y or y.0 (4 <= y <= current version).
if (!VerParts.first.startswith("0") &&
!VerParts.first.getAsInteger(10, Major) &&
3 <= Major && Major <= CLANG_VERSION_MAJOR &&
(Major == 3 ? VerParts.second.size() == 1 &&
!VerParts.second.getAsInteger(10, Minor)
: VerParts.first.size() == Ver.size() ||
VerParts.second == "0")) {
// Got a valid version number.
if (Major == 3 && Minor <= 8)
Opts.setClangABICompat(LangOptions::ClangABI::Ver3_8);
else if (Major <= 4)
Opts.setClangABICompat(LangOptions::ClangABI::Ver4);
else if (Major <= 6)
Opts.setClangABICompat(LangOptions::ClangABI::Ver6);
else if (Major <= 7)
Opts.setClangABICompat(LangOptions::ClangABI::Ver7);
} else if (Ver != "latest") {
Diags.Report(diag::err_drv_invalid_value)
<< A->getAsString(Args) << A->getValue();
}
}
Opts.CompleteMemberPointers = Args.hasArg(OPT_fcomplete_member_pointers);
Opts.BuildingPCHWithObjectFile = Args.hasArg(OPT_building_pch_with_obj);
}
static bool isStrictlyPreprocessorAction(frontend::ActionKind Action) {
switch (Action) {
case frontend::ASTDeclList:
case frontend::ASTDump:
case frontend::ASTPrint:
case frontend::ASTView:
case frontend::EmitAssembly:
case frontend::EmitBC:
case frontend::EmitHTML:
case frontend::EmitLLVM:
case frontend::EmitLLVMOnly:
case frontend::EmitCodeGenOnly:
case frontend::EmitObj:
case frontend::FixIt:
case frontend::GenerateModule:
case frontend::GenerateModuleInterface:
case frontend::GenerateHeaderModule:
case frontend::GeneratePCH:
case frontend::ParseSyntaxOnly:
case frontend::ModuleFileInfo:
case frontend::VerifyPCH:
case frontend::PluginAction:
case frontend::RewriteObjC:
case frontend::RewriteTest:
case frontend::RunAnalysis:
case frontend::TemplightDump:
case frontend::MigrateSource:
return false;
case frontend::DumpCompilerOptions:
case frontend::DumpRawTokens:
case frontend::DumpTokens:
case frontend::InitOnly:
case frontend::PrintPreamble:
case frontend::PrintPreprocessedInput:
case frontend::RewriteMacros:
case frontend::RunPreprocessorOnly:
return true;
}
llvm_unreachable("invalid frontend action");
}
static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
DiagnosticsEngine &Diags,
frontend::ActionKind Action) {
Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
Opts.PCHWithHdrStop = Args.hasArg(OPT_pch_through_hdrstop_create) ||
Args.hasArg(OPT_pch_through_hdrstop_use);
Opts.PCHWithHdrStopCreate = Args.hasArg(OPT_pch_through_hdrstop_create);
Opts.PCHThroughHeader = Args.getLastArgValue(OPT_pch_through_header_EQ);
Opts.UsePredefines = !Args.hasArg(OPT_undef);
Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
Opts.AllowPCHWithCompilerErrors = Args.hasArg(OPT_fallow_pch_with_errors);
Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
for (const auto *A : Args.filtered(OPT_error_on_deserialized_pch_decl))
Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
StringRef Value(A->getValue());
size_t Comma = Value.find(',');
unsigned Bytes = 0;
unsigned EndOfLine = 0;
if (Comma == StringRef::npos ||
Value.substr(0, Comma).getAsInteger(10, Bytes) ||
Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
Diags.Report(diag::err_drv_preamble_format);
else {
Opts.PrecompiledPreambleBytes.first = Bytes;
Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
}
}
// Add the __CET__ macro if a CFProtection option is set.
if (const Arg *A = Args.getLastArg(OPT_fcf_protection_EQ)) {
StringRef Name = A->getValue();
if (Name == "branch")
Opts.addMacroDef("__CET__=1");
else if (Name == "return")
Opts.addMacroDef("__CET__=2");
else if (Name == "full")
Opts.addMacroDef("__CET__=3");
}
// Add macros from the command line.
for (const auto *A : Args.filtered(OPT_D, OPT_U)) {
if (A->getOption().matches(OPT_D))
Opts.addMacroDef(A->getValue());
else
Opts.addMacroUndef(A->getValue());
}
Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
// Add the ordered list of -includes.
for (const auto *A : Args.filtered(OPT_include))
Opts.Includes.emplace_back(A->getValue());
for (const auto *A : Args.filtered(OPT_chain_include))
Opts.ChainedIncludes.emplace_back(A->getValue());
for (const auto *A : Args.filtered(OPT_remap_file)) {
std::pair<StringRef, StringRef> Split = StringRef(A->getValue()).split(';');
if (Split.second.empty()) {
Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
continue;
}
Opts.addRemappedFile(Split.first, Split.second);
}
if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
StringRef Name = A->getValue();
unsigned Library = llvm::StringSwitch<unsigned>(Name)
.Case("libc++", ARCXX_libcxx)
.Case("libstdc++", ARCXX_libstdcxx)
.Case("none", ARCXX_nolib)
.Default(~0U);
if (Library == ~0U)
Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
else
Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
}
// Always avoid lexing editor placeholders when we're just running the
// preprocessor as we never want to emit the
// "editor placeholder in source file" error in PP only mode.
if (isStrictlyPreprocessorAction(Action))
Opts.LexEditorPlaceholders = false;
}
static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
ArgList &Args,
frontend::ActionKind Action) {
if (isStrictlyPreprocessorAction(Action))
Opts.ShowCPP = !Args.hasArg(OPT_dM);
else
Opts.ShowCPP = 0;
Opts.ShowComments = Args.hasArg(OPT_C);
Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
Opts.ShowMacroComments = Args.hasArg(OPT_CC);
Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
Opts.ShowIncludeDirectives = Args.hasArg(OPT_dI);
Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
Opts.RewriteImports = Args.hasArg(OPT_frewrite_imports);
Opts.UseLineDirectives = Args.hasArg(OPT_fuse_line_directives);
}
static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args,
DiagnosticsEngine &Diags) {
Opts.CodeModel = getCodeModel(Args, Diags);
Opts.ABI = Args.getLastArgValue(OPT_target_abi);
if (Arg *A = Args.getLastArg(OPT_meabi)) {
StringRef Value = A->getValue();
llvm::EABI EABIVersion = llvm::StringSwitch<llvm::EABI>(Value)
.Case("default", llvm::EABI::Default)
.Case("4", llvm::EABI::EABI4)
.Case("5", llvm::EABI::EABI5)
.Case("gnu", llvm::EABI::GNU)
.Default(llvm::EABI::Unknown);
if (EABIVersion == llvm::EABI::Unknown)
Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
<< Value;
else
Opts.EABIVersion = EABIVersion;
}
Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
Opts.FPMath = Args.getLastArgValue(OPT_mfpmath);
Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
Opts.Triple = Args.getLastArgValue(OPT_triple);
// Use the default target triple if unspecified.
if (Opts.Triple.empty())
Opts.Triple = llvm::sys::getDefaultTargetTriple();
Opts.Triple = llvm::Triple::normalize(Opts.Triple);
Opts.OpenCLExtensionsAsWritten = Args.getAllArgValues(OPT_cl_ext_EQ);
Opts.ForceEnableInt128 = Args.hasArg(OPT_fforce_enable_int128);
Opts.NVPTXUseShortPointers = Args.hasFlag(
options::OPT_fcuda_short_ptr, options::OPT_fno_cuda_short_ptr, false);
if (Arg *A = Args.getLastArg(options::OPT_target_sdk_version_EQ)) {
llvm::VersionTuple Version;
if (Version.tryParse(A->getValue()))
Diags.Report(diag::err_drv_invalid_value)
<< A->getAsString(Args) << A->getValue();
else
Opts.SDKVersion = Version;
}
}
bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
const char *const *ArgBegin,
const char *const *ArgEnd,
DiagnosticsEngine &Diags) {
bool Success = true;
// Parse the arguments.
std::unique_ptr<OptTable> Opts = createDriverOptTable();
const unsigned IncludedFlagsBitmask = options::CC1Option;
unsigned MissingArgIndex, MissingArgCount;
InputArgList Args =
Opts->ParseArgs(llvm::makeArrayRef(ArgBegin, ArgEnd), MissingArgIndex,
MissingArgCount, IncludedFlagsBitmask);
LangOptions &LangOpts = *Res.getLangOpts();
// Check for missing argument error.
if (MissingArgCount) {
Diags.Report(diag::err_drv_missing_argument)
<< Args.getArgString(MissingArgIndex) << MissingArgCount;
Success = false;
}
// Issue errors on unknown arguments.
for (const auto *A : Args.filtered(OPT_UNKNOWN)) {
auto ArgString = A->getAsString(Args);
std::string Nearest;
if (Opts->findNearest(ArgString, Nearest, IncludedFlagsBitmask) > 1)
Diags.Report(diag::err_drv_unknown_argument) << ArgString;
else
Diags.Report(diag::err_drv_unknown_argument_with_suggestion)
<< ArgString << Nearest;
Success = false;
}
Success &= ParseAnalyzerArgs(*Res.getAnalyzerOpts(), Args, Diags);
Success &= ParseMigratorArgs(Res.getMigratorOpts(), Args);
ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), Args);
Success &=
ParseDiagnosticArgs(Res.getDiagnosticOpts(), Args, &Diags,
false /*DefaultDiagColor*/, false /*DefaultShowOpt*/);
ParseCommentArgs(LangOpts.CommentOpts, Args);
ParseFileSystemArgs(Res.getFileSystemOpts(), Args);
// FIXME: We shouldn't have to pass the DashX option around here
InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), Args, Diags,
LangOpts.IsHeaderFile);
ParseTargetArgs(Res.getTargetOpts(), Args, Diags);
Success &= ParseCodeGenArgs(Res.getCodeGenOpts(), Args, DashX, Diags,
Res.getTargetOpts(), Res.getFrontendOpts());
ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), Args,
Res.getFileSystemOpts().WorkingDir);
llvm::Triple T(Res.getTargetOpts().Triple);
if (DashX.getFormat() == InputKind::Precompiled ||
DashX.getLanguage() == InputKind::LLVM_IR) {
// ObjCAAutoRefCount and Sanitize LangOpts are used to setup the
// PassManager in BackendUtil.cpp. They need to be initializd no matter
// what the input type is.
if (Args.hasArg(OPT_fobjc_arc))
LangOpts.ObjCAutoRefCount = 1;
// PIClevel and PIELevel are needed during code generation and this should be
// set regardless of the input type.
LangOpts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
LangOpts.PIE = Args.hasArg(OPT_pic_is_pie);
parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
Diags, LangOpts.Sanitize);
} else {
// Other LangOpts are only initialized when the input is not AST or LLVM IR.
// FIXME: Should we really be calling this for an InputKind::Asm input?
ParseLangArgs(LangOpts, Args, DashX, Res.getTargetOpts(),
Res.getPreprocessorOpts(), Diags);
if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
LangOpts.ObjCExceptions = 1;
if (T.isOSDarwin() && DashX.isPreprocessed()) {
// Supress the darwin-specific 'stdlibcxx-not-found' diagnostic for
// preprocessed input as we don't expect it to be used with -std=libc++
// anyway.
Res.getDiagnosticOpts().Warnings.push_back("no-stdlibcxx-not-found");
}
}
LangOpts.FunctionAlignment =
getLastArgIntValue(Args, OPT_function_alignment, 0, Diags);
if (LangOpts.CUDA) {
// During CUDA device-side compilation, the aux triple is the
// triple used for host compilation.
if (LangOpts.CUDAIsDevice)
Res.getTargetOpts().HostTriple = Res.getFrontendOpts().AuxTriple;
}
// Set the triple of the host for OpenMP device compile.
if (LangOpts.OpenMPIsDevice)
Res.getTargetOpts().HostTriple = Res.getFrontendOpts().AuxTriple;
// FIXME: Override value name discarding when asan or msan is used because the
// backend passes depend on the name of the alloca in order to print out
// names.
Res.getCodeGenOpts().DiscardValueNames &=
!LangOpts.Sanitize.has(SanitizerKind::Address) &&
!LangOpts.Sanitize.has(SanitizerKind::KernelAddress) &&
!LangOpts.Sanitize.has(SanitizerKind::Memory) &&
!LangOpts.Sanitize.has(SanitizerKind::KernelMemory);
ParsePreprocessorArgs(Res.getPreprocessorOpts(), Args, Diags,
Res.getFrontendOpts().ProgramAction);
ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), Args,
Res.getFrontendOpts().ProgramAction);
// Turn on -Wspir-compat for SPIR target.
auto Arch = T.getArch();
if (Arch == llvm::Triple::spir || Arch == llvm::Triple::spir64) {
Res.getDiagnosticOpts().Warnings.push_back("spir-compat");
}
// If sanitizer is enabled, disable OPT_ffine_grained_bitfield_accesses.
if (Res.getCodeGenOpts().FineGrainedBitfieldAccesses &&
!Res.getLangOpts()->Sanitize.empty()) {
Res.getCodeGenOpts().FineGrainedBitfieldAccesses = false;
Diags.Report(diag::warn_drv_fine_grained_bitfield_accesses_ignored);
}
return Success;
}
std::string CompilerInvocation::getModuleHash() const {
// Note: For QoI reasons, the things we use as a hash here should all be
// dumped via the -module-info flag.
using llvm::hash_code;
using llvm::hash_value;
using llvm::hash_combine;
// Start the signature with the compiler version.
// FIXME: We'd rather use something more cryptographically sound than
// CityHash, but this will do for now.
hash_code code = hash_value(getClangFullRepositoryVersion());
// Extend the signature with the language options
#define LANGOPT(Name, Bits, Default, Description) \
code = hash_combine(code, LangOpts->Name);
#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
#define BENIGN_LANGOPT(Name, Bits, Default, Description)
#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
#include "clang/Basic/LangOptions.def"
for (StringRef Feature : LangOpts->ModuleFeatures)
code = hash_combine(code, Feature);
// Extend the signature with the target options.
code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
TargetOpts->ABI);
for (const auto &FeatureAsWritten : TargetOpts->FeaturesAsWritten)
code = hash_combine(code, FeatureAsWritten);
// Extend the signature with preprocessor options.
const PreprocessorOptions &ppOpts = getPreprocessorOpts();
const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
for (const auto &I : getPreprocessorOpts().Macros) {
// If we're supposed to ignore this macro for the purposes of modules,
// don't put it into the hash.
if (!hsOpts.ModulesIgnoreMacros.empty()) {
// Check whether we're ignoring this macro.
StringRef MacroDef = I.first;
if (hsOpts.ModulesIgnoreMacros.count(
llvm::CachedHashString(MacroDef.split('=').first)))
continue;
}
code = hash_combine(code, I.first, I.second);
}
// Extend the signature with the sysroot and other header search options.
code = hash_combine(code, hsOpts.Sysroot,
hsOpts.ModuleFormat,
hsOpts.UseDebugInfo,
hsOpts.UseBuiltinIncludes,
hsOpts.UseStandardSystemIncludes,
hsOpts.UseStandardCXXIncludes,
hsOpts.UseLibcxx,
hsOpts.ModulesValidateDiagnosticOptions);
code = hash_combine(code, hsOpts.ResourceDir);
// Extend the signature with the user build path.
code = hash_combine(code, hsOpts.ModuleUserBuildPath);
// Extend the signature with the module file extensions.
const FrontendOptions &frontendOpts = getFrontendOpts();
for (const auto &ext : frontendOpts.ModuleFileExtensions) {
code = ext->hashExtension(code);
}
// When compiling with -gmodules, also hash -fdebug-prefix-map as it
// affects the debug info in the PCM.
if (getCodeGenOpts().DebugTypeExtRefs)
for (const auto &KeyValue : getCodeGenOpts().DebugPrefixMap)
code = hash_combine(code, KeyValue.first, KeyValue.second);
// Extend the signature with the enabled sanitizers, if at least one is
// enabled. Sanitizers which cannot affect AST generation aren't hashed.
SanitizerSet SanHash = LangOpts->Sanitize;
SanHash.clear(getPPTransparentSanitizers());
if (!SanHash.empty())
code = hash_combine(code, SanHash.Mask);
return llvm::APInt(64, code).toString(36, /*Signed=*/false);
}
template<typename IntTy>
static IntTy getLastArgIntValueImpl(const ArgList &Args, OptSpecifier Id,
IntTy Default,
DiagnosticsEngine *Diags) {
IntTy Res = Default;
if (Arg *A = Args.getLastArg(Id)) {
if (StringRef(A->getValue()).getAsInteger(10, Res)) {
if (Diags)
Diags->Report(diag::err_drv_invalid_int_value) << A->getAsString(Args)
<< A->getValue();
}
}
return Res;
}
namespace clang {
// Declared in clang/Frontend/Utils.h.
int getLastArgIntValue(const ArgList &Args, OptSpecifier Id, int Default,
DiagnosticsEngine *Diags) {
return getLastArgIntValueImpl<int>(Args, Id, Default, Diags);
}
uint64_t getLastArgUInt64Value(const ArgList &Args, OptSpecifier Id,
uint64_t Default,
DiagnosticsEngine *Diags) {
return getLastArgIntValueImpl<uint64_t>(Args, Id, Default, Diags);
}
IntrusiveRefCntPtr<llvm::vfs::FileSystem>
createVFSFromCompilerInvocation(const CompilerInvocation &CI,
DiagnosticsEngine &Diags) {
return createVFSFromCompilerInvocation(CI, Diags,
llvm::vfs::getRealFileSystem());
}
IntrusiveRefCntPtr<llvm::vfs::FileSystem> createVFSFromCompilerInvocation(
const CompilerInvocation &CI, DiagnosticsEngine &Diags,
IntrusiveRefCntPtr<llvm::vfs::FileSystem> BaseFS) {
if (CI.getHeaderSearchOpts().VFSOverlayFiles.empty())
return BaseFS;
IntrusiveRefCntPtr<llvm::vfs::FileSystem> Result = BaseFS;
// earlier vfs files are on the bottom
for (const auto &File : CI.getHeaderSearchOpts().VFSOverlayFiles) {
llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Buffer =
Result->getBufferForFile(File);
if (!Buffer) {
Diags.Report(diag::err_missing_vfs_overlay_file) << File;
continue;
}
IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS = llvm::vfs::getVFSFromYAML(
std::move(Buffer.get()), /*DiagHandler*/ nullptr, File,
/*DiagContext*/ nullptr, Result);
if (!FS) {
Diags.Report(diag::err_invalid_vfs_overlay) << File;
continue;
}
Result = FS;
}
return Result;
}
} // namespace clang
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