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//===--- CodeGenOptions.h ---------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file defines the CodeGenOptions interface.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_BASIC_CODEGENOPTIONS_H
#define LLVM_CLANG_BASIC_CODEGENOPTIONS_H
#include "clang/Basic/PointerAuthOptions.h"
#include "clang/Basic/Sanitizers.h"
#include "clang/Basic/XRayInstr.h"
#include "llvm/ADT/FloatingPointMode.h"
#include "llvm/Frontend/Debug/Options.h"
#include "llvm/Frontend/Driver/CodeGenOptions.h"
#include "llvm/Support/CodeGen.h"
#include "llvm/Support/Regex.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Transforms/Instrumentation/AddressSanitizerOptions.h"
#include <map>
#include <memory>
#include <string>
#include <vector>
namespace llvm {
class PassBuilder;
}
namespace clang {
/// Bitfields of CodeGenOptions, split out from CodeGenOptions to ensure
/// that this large collection of bitfields is a trivial class type.
class CodeGenOptionsBase {
friend class CompilerInvocation;
friend class CompilerInvocationBase;
public:
#define CODEGENOPT(Name, Bits, Default) unsigned Name : Bits;
#define ENUM_CODEGENOPT(Name, Type, Bits, Default)
#include "clang/Basic/CodeGenOptions.def"
protected:
#define CODEGENOPT(Name, Bits, Default)
#define ENUM_CODEGENOPT(Name, Type, Bits, Default) unsigned Name : Bits;
#include "clang/Basic/CodeGenOptions.def"
};
/// CodeGenOptions - Track various options which control how the code
/// is optimized and passed to the backend.
class CodeGenOptions : public CodeGenOptionsBase {
public:
enum InliningMethod {
NormalInlining, // Use the standard function inlining pass.
OnlyHintInlining, // Inline only (implicitly) hinted functions.
OnlyAlwaysInlining // Only run the always inlining pass.
};
enum ObjCDispatchMethodKind {
Legacy = 0,
NonLegacy = 1,
Mixed = 2
};
enum TLSModel {
GeneralDynamicTLSModel,
LocalDynamicTLSModel,
InitialExecTLSModel,
LocalExecTLSModel
};
enum StructReturnConventionKind {
SRCK_Default, // No special option was passed.
SRCK_OnStack, // Small structs on the stack (-fpcc-struct-return).
SRCK_InRegs // Small structs in registers (-freg-struct-return).
};
enum ProfileInstrKind {
ProfileNone, // Profile instrumentation is turned off.
ProfileClangInstr, // Clang instrumentation to generate execution counts
// to use with PGO.
ProfileIRInstr, // IR level PGO instrumentation in LLVM.
ProfileCSIRInstr, // IR level PGO context sensitive instrumentation in LLVM.
};
enum EmbedBitcodeKind {
Embed_Off, // No embedded bitcode.
Embed_All, // Embed both bitcode and commandline in the output.
Embed_Bitcode, // Embed just the bitcode in the output.
Embed_Marker // Embed a marker as a placeholder for bitcode.
};
enum InlineAsmDialectKind {
IAD_ATT,
IAD_Intel,
};
enum DebugSrcHashKind {
DSH_MD5,
DSH_SHA1,
DSH_SHA256,
};
// This field stores one of the allowed values for the option
// -fbasic-block-sections=. The allowed values with this option are:
// {"labels", "all", "list=<file>", "none"}.
//
// "labels": Only generate basic block symbols (labels) for all basic
// blocks, do not generate unique sections for basic blocks.
// Use the machine basic block id in the symbol name to
// associate profile info from virtual address to machine
// basic block.
// "all" : Generate basic block sections for all basic blocks.
// "list=<file>": Generate basic block sections for a subset of basic blocks.
// The functions and the machine basic block ids are specified
// in the file.
// "none": Disable sections/labels for basic blocks.
std::string BBSections;
// If set, override the default value of MCAsmInfo::BinutilsVersion. If
// DisableIntegratedAS is specified, the assembly output will consider GNU as
// support. "none" means that all ELF features can be used, regardless of
// binutils support.
std::string BinutilsVersion;
enum class FramePointerKind {
None, // Omit all frame pointers.
Reserved, // Maintain valid frame pointer chain.
NonLeaf, // Keep non-leaf frame pointers.
All, // Keep all frame pointers.
};
static StringRef getFramePointerKindName(FramePointerKind Kind) {
switch (Kind) {
case FramePointerKind::None:
return "none";
case FramePointerKind::Reserved:
return "reserved";
case FramePointerKind::NonLeaf:
return "non-leaf";
case FramePointerKind::All:
return "all";
}
llvm_unreachable("invalid FramePointerKind");
}
enum class SwiftAsyncFramePointerKind {
Auto, // Choose Swift async extended frame info based on deployment target.
Always, // Unconditionally emit Swift async extended frame info.
Never, // Don't emit Swift async extended frame info.
Default = Always,
};
enum FiniteLoopsKind {
Language, // Not specified, use language standard.
Always, // All loops are assumed to be finite.
Never, // No loop is assumed to be finite.
};
enum AssignmentTrackingOpts {
Disabled,
Enabled,
Forced,
};
/// The code model to use (-mcmodel).
std::string CodeModel;
/// The code model-specific large data threshold to use
/// (-mlarge-data-threshold).
uint64_t LargeDataThreshold;
/// The filename with path we use for coverage data files. The runtime
/// allows further manipulation with the GCOV_PREFIX and GCOV_PREFIX_STRIP
/// environment variables.
std::string CoverageDataFile;
/// The filename with path we use for coverage notes files.
std::string CoverageNotesFile;
/// Regexes separated by a semi-colon to filter the files to instrument.
std::string ProfileFilterFiles;
/// Regexes separated by a semi-colon to filter the files to not instrument.
std::string ProfileExcludeFiles;
/// The version string to put into coverage files.
char CoverageVersion[4];
/// Enable additional debugging information.
std::string DebugPass;
/// The string to embed in debug information as the current working directory.
std::string DebugCompilationDir;
/// The string to embed in coverage mapping as the current working directory.
std::string CoverageCompilationDir;
/// The string to embed in the debug information for the compile unit, if
/// non-empty.
std::string DwarfDebugFlags;
/// The string containing the commandline for the llvm.commandline metadata,
/// if non-empty.
std::string RecordCommandLine;
llvm::SmallVector<std::pair<std::string, std::string>, 0> DebugPrefixMap;
/// Prefix replacement map for source-based code coverage to remap source
/// file paths in coverage mapping.
llvm::SmallVector<std::pair<std::string, std::string>, 0> CoveragePrefixMap;
/// The ABI to use for passing floating point arguments.
std::string FloatABI;
/// The file to use for dumping bug report by `Debugify` for original
/// debug info.
std::string DIBugsReportFilePath;
/// The floating-point denormal mode to use.
llvm::DenormalMode FPDenormalMode = llvm::DenormalMode::getIEEE();
/// The floating-point denormal mode to use, for float.
llvm::DenormalMode FP32DenormalMode = llvm::DenormalMode::getIEEE();
/// The float precision limit to use, if non-empty.
std::string LimitFloatPrecision;
struct BitcodeFileToLink {
/// The filename of the bitcode file to link in.
std::string Filename;
/// If true, we set attributes functions in the bitcode library according to
/// our CodeGenOptions, much as we set attrs on functions that we generate
/// ourselves.
bool PropagateAttrs = false;
/// If true, we use LLVM module internalizer.
bool Internalize = false;
/// Bitwise combination of llvm::Linker::Flags, passed to the LLVM linker.
unsigned LinkFlags = 0;
};
/// The files specified here are linked in to the module before optimizations.
std::vector<BitcodeFileToLink> LinkBitcodeFiles;
/// The user provided name for the "main file", if non-empty. This is useful
/// in situations where the input file name does not match the original input
/// file, for example with -save-temps.
std::string MainFileName;
/// The name for the split debug info file used for the DW_AT_[GNU_]dwo_name
/// attribute in the skeleton CU.
std::string SplitDwarfFile;
/// Output filename for the split debug info, not used in the skeleton CU.
std::string SplitDwarfOutput;
/// Output filename used in the COFF debug information.
std::string ObjectFilenameForDebug;
/// The name of the relocation model to use.
llvm::Reloc::Model RelocationModel;
/// If not an empty string, trap intrinsics are lowered to calls to this
/// function instead of to trap instructions.
std::string TrapFuncName;
/// A list of dependent libraries.
std::vector<std::string> DependentLibraries;
/// A list of linker options to embed in the object file.
std::vector<std::string> LinkerOptions;
/// Name of the profile file to use as output for -fprofile-instr-generate,
/// -fprofile-generate, and -fcs-profile-generate.
std::string InstrProfileOutput;
/// Name of the profile file to use with -fprofile-sample-use.
std::string SampleProfileFile;
/// Name of the profile file to use as output for with -fmemory-profile.
std::string MemoryProfileOutput;
/// Name of the profile file to use as input for -fmemory-profile-use.
std::string MemoryProfileUsePath;
/// Name of the profile file to use as input for -fprofile-instr-use
std::string ProfileInstrumentUsePath;
/// Name of the profile remapping file to apply to the profile data supplied
/// by -fprofile-sample-use or -fprofile-instr-use.
std::string ProfileRemappingFile;
/// Name of the function summary index file to use for ThinLTO function
/// importing.
std::string ThinLTOIndexFile;
/// Name of a file that can optionally be written with minimized bitcode
/// to be used as input for the ThinLTO thin link step, which only needs
/// the summary and module symbol table (and not, e.g. any debug metadata).
std::string ThinLinkBitcodeFile;
/// Prefix to use for -save-temps output.
std::string SaveTempsFilePrefix;
/// Name of file passed with -fcuda-include-gpubinary option to forward to
/// CUDA runtime back-end for incorporating them into host-side object file.
std::string CudaGpuBinaryFileName;
/// List of filenames passed in using the -fembed-offload-object option. These
/// are offloading binaries containing device images and metadata.
std::vector<std::string> OffloadObjects;
/// The name of the file to which the backend should save YAML optimization
/// records.
std::string OptRecordFile;
/// The regex that filters the passes that should be saved to the optimization
/// records.
std::string OptRecordPasses;
/// The format used for serializing remarks (default: YAML)
std::string OptRecordFormat;
/// The name of the partition that symbols are assigned to, specified with
/// -fsymbol-partition (see https://lld.llvm.org/Partitions.html).
std::string SymbolPartition;
enum RemarkKind {
RK_Missing, // Remark argument not present on the command line.
RK_Enabled, // Remark enabled via '-Rgroup'.
RK_EnabledEverything, // Remark enabled via '-Reverything'.
RK_Disabled, // Remark disabled via '-Rno-group'.
RK_DisabledEverything, // Remark disabled via '-Rno-everything'.
RK_WithPattern, // Remark pattern specified via '-Rgroup=regexp'.
};
/// Optimization remark with an optional regular expression pattern.
struct OptRemark {
RemarkKind Kind = RK_Missing;
std::string Pattern;
std::shared_ptr<llvm::Regex> Regex;
/// By default, optimization remark is missing.
OptRemark() = default;
/// Returns true iff the optimization remark holds a valid regular
/// expression.
bool hasValidPattern() const { return Regex != nullptr; }
/// Matches the given string against the regex, if there is some.
bool patternMatches(StringRef String) const {
return hasValidPattern() && Regex->match(String);
}
};
/// Selected optimizations for which we should enable optimization remarks.
/// Transformation passes whose name matches the contained (optional) regular
/// expression (and support this feature), will emit a diagnostic whenever
/// they perform a transformation.
OptRemark OptimizationRemark;
/// Selected optimizations for which we should enable missed optimization
/// remarks. Transformation passes whose name matches the contained (optional)
/// regular expression (and support this feature), will emit a diagnostic
/// whenever they tried but failed to perform a transformation.
OptRemark OptimizationRemarkMissed;
/// Selected optimizations for which we should enable optimization analyses.
/// Transformation passes whose name matches the contained (optional) regular
/// expression (and support this feature), will emit a diagnostic whenever
/// they want to explain why they decided to apply or not apply a given
/// transformation.
OptRemark OptimizationRemarkAnalysis;
/// Set of sanitizer checks that are non-fatal (i.e. execution should be
/// continued when possible).
SanitizerSet SanitizeRecover;
/// Set of sanitizer checks that trap rather than diagnose.
SanitizerSet SanitizeTrap;
/// List of backend command-line options for -fembed-bitcode.
std::vector<uint8_t> CmdArgs;
/// A list of all -fno-builtin-* function names (e.g., memset).
std::vector<std::string> NoBuiltinFuncs;
std::vector<std::string> Reciprocals;
/// Configuration for pointer-signing.
PointerAuthOptions PointerAuth;
/// The preferred width for auto-vectorization transforms. This is intended to
/// override default transforms based on the width of the architected vector
/// registers.
std::string PreferVectorWidth;
/// Set of XRay instrumentation kinds to emit.
XRayInstrSet XRayInstrumentationBundle;
std::vector<std::string> DefaultFunctionAttrs;
/// List of dynamic shared object files to be loaded as pass plugins.
std::vector<std::string> PassPlugins;
/// List of pass builder callbacks.
std::vector<std::function<void(llvm::PassBuilder &)>> PassBuilderCallbacks;
/// List of global variables explicitly specified by the user as toc-data.
std::vector<std::string> TocDataVarsUserSpecified;
/// List of global variables that over-ride the toc-data default.
std::vector<std::string> NoTocDataVars;
/// Path to allowlist file specifying which objects
/// (files, functions) should exclusively be instrumented
/// by sanitizer coverage pass.
std::vector<std::string> SanitizeCoverageAllowlistFiles;
/// The guard style used for stack protector to get a initial value, this
/// value usually be gotten from TLS or get from __stack_chk_guard, or some
/// other styles we may implement in the future.
std::string StackProtectorGuard;
/// The TLS base register when StackProtectorGuard is "tls", or register used
/// to store the stack canary for "sysreg".
/// On x86 this can be "fs" or "gs".
/// On AArch64 this can only be "sp_el0".
std::string StackProtectorGuardReg;
/// Specify a symbol to be the guard value.
std::string StackProtectorGuardSymbol;
/// Path to ignorelist file specifying which objects
/// (files, functions) listed for instrumentation by sanitizer
/// coverage pass should actually not be instrumented.
std::vector<std::string> SanitizeCoverageIgnorelistFiles;
/// Path to ignorelist file specifying which objects
/// (files, functions) listed for instrumentation by sanitizer
/// binary metadata pass should not be instrumented.
std::vector<std::string> SanitizeMetadataIgnorelistFiles;
/// Name of the stack usage file (i.e., .su file) if user passes
/// -fstack-usage. If empty, it can be implied that -fstack-usage is not
/// passed on the command line.
std::string StackUsageOutput;
/// Executable and command-line used to create a given CompilerInvocation.
/// Most of the time this will be the full -cc1 command.
const char *Argv0 = nullptr;
std::vector<std::string> CommandLineArgs;
/// The minimum hotness value a diagnostic needs in order to be included in
/// optimization diagnostics.
///
/// The threshold is an Optional value, which maps to one of the 3 states:
/// 1. 0 => threshold disabled. All remarks will be printed.
/// 2. positive int => manual threshold by user. Remarks with hotness exceed
/// threshold will be printed.
/// 3. None => 'auto' threshold by user. The actual value is not
/// available at command line, but will be synced with
/// hotness threshold from profile summary during
/// compilation.
///
/// If threshold option is not specified, it is disabled by default.
std::optional<uint64_t> DiagnosticsHotnessThreshold = 0;
/// The maximum percentage profiling weights can deviate from the expected
/// values in order to be included in misexpect diagnostics.
std::optional<uint32_t> DiagnosticsMisExpectTolerance = 0;
/// The name of a file to use with \c .secure_log_unique directives.
std::string AsSecureLogFile;
public:
// Define accessors/mutators for code generation options of enumeration type.
#define CODEGENOPT(Name, Bits, Default)
#define ENUM_CODEGENOPT(Name, Type, Bits, Default) \
Type get##Name() const { return static_cast<Type>(Name); } \
void set##Name(Type Value) { Name = static_cast<unsigned>(Value); }
#include "clang/Basic/CodeGenOptions.def"
CodeGenOptions();
const std::vector<std::string> &getNoBuiltinFuncs() const {
return NoBuiltinFuncs;
}
/// Check if Clang profile instrumenation is on.
bool hasProfileClangInstr() const {
return getProfileInstr() == ProfileClangInstr;
}
/// Check if IR level profile instrumentation is on.
bool hasProfileIRInstr() const {
return getProfileInstr() == ProfileIRInstr;
}
/// Check if CS IR level profile instrumentation is on.
bool hasProfileCSIRInstr() const {
return getProfileInstr() == ProfileCSIRInstr;
}
/// Check if any form of instrumentation is on.
bool hasProfileInstr() const { return getProfileInstr() != ProfileNone; }
/// Check if Clang profile use is on.
bool hasProfileClangUse() const {
return getProfileUse() == ProfileClangInstr;
}
/// Check if IR level profile use is on.
bool hasProfileIRUse() const {
return getProfileUse() == ProfileIRInstr ||
getProfileUse() == ProfileCSIRInstr;
}
/// Check if CSIR profile use is on.
bool hasProfileCSIRUse() const { return getProfileUse() == ProfileCSIRInstr; }
/// Check if type and variable info should be emitted.
bool hasReducedDebugInfo() const {
return getDebugInfo() >= llvm::codegenoptions::DebugInfoConstructor;
}
/// Check if maybe unused type info should be emitted.
bool hasMaybeUnusedDebugInfo() const {
return getDebugInfo() >= llvm::codegenoptions::UnusedTypeInfo;
}
// Check if any one of SanitizeCoverage* is enabled.
bool hasSanitizeCoverage() const {
return SanitizeCoverageType || SanitizeCoverageIndirectCalls ||
SanitizeCoverageTraceCmp || SanitizeCoverageTraceLoads ||
SanitizeCoverageTraceStores || SanitizeCoverageControlFlow;
}
// Check if any one of SanitizeBinaryMetadata* is enabled.
bool hasSanitizeBinaryMetadata() const {
return SanitizeBinaryMetadataCovered || SanitizeBinaryMetadataAtomics ||
SanitizeBinaryMetadataUAR;
}
/// Reset all of the options that are not considered when building a
/// module.
void resetNonModularOptions(StringRef ModuleFormat);
};
} // end namespace clang
#endif
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