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//===--- CodeGenOptions.h ---------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the CodeGenOptions interface.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_FRONTEND_CODEGENOPTIONS_H
#define LLVM_CLANG_FRONTEND_CODEGENOPTIONS_H
#include <string>
#include <vector>
namespace clang {
/// CodeGenOptions - Track various options which control how the code
/// is optimized and passed to the backend.
class CodeGenOptions {
public:
enum InliningMethod {
NoInlining, // Perform no inlining whatsoever.
NormalInlining, // Use the standard function inlining pass.
OnlyAlwaysInlining // Only run the always inlining pass.
};
enum ObjCDispatchMethodKind {
Legacy = 0,
NonLegacy = 1,
Mixed = 2
};
enum DebugInfoKind {
NoDebugInfo, // Don't generate debug info.
DebugLineTablesOnly, // Emit only debug info necessary for generating
// line number tables (-gline-tables-only).
LimitedDebugInfo, // Limit generated debug info to reduce size
// (-flimit-debug-info).
FullDebugInfo // Generate complete debug info.
};
enum TLSModel {
GeneralDynamicTLSModel,
LocalDynamicTLSModel,
InitialExecTLSModel,
LocalExecTLSModel
};
unsigned AsmVerbose : 1; ///< -dA, -fverbose-asm.
unsigned ObjCAutoRefCountExceptions : 1; ///< Whether ARC should be EH-safe.
unsigned CUDAIsDevice : 1; ///< Set when compiling for CUDA device.
unsigned CXAAtExit : 1; ///< Use __cxa_atexit for calling destructors.
unsigned CXXCtorDtorAliases: 1; ///< Emit complete ctors/dtors as linker
///< aliases to base ctors when possible.
unsigned DataSections : 1; ///< Set when -fdata-sections is enabled
unsigned DisableFPElim : 1; ///< Set when -fomit-frame-pointer is enabled.
unsigned DisableLLVMOpts : 1; ///< Don't run any optimizations, for use in
///< getting .bc files that correspond to the
///< internal state before optimizations are
///< done.
unsigned DisableRedZone : 1; ///< Set when -mno-red-zone is enabled.
unsigned DisableTailCalls : 1; ///< Do not emit tail calls.
unsigned EmitDeclMetadata : 1; ///< Emit special metadata indicating what
///< Decl* various IR entities came from. Only
///< useful when running CodeGen as a
///< subroutine.
unsigned EmitGcovArcs : 1; ///< Emit coverage data files, aka. GCDA.
unsigned EmitGcovNotes : 1; ///< Emit coverage "notes" files, aka GCNO.
unsigned EmitOpenCLArgMetadata : 1; /// Emit OpenCL kernel arg metadata.
unsigned EmitMicrosoftInlineAsm : 1; ///< Enable emission of MS-style inline
///< assembly.
unsigned ForbidGuardVariables : 1; ///< Issue errors if C++ guard variables
///< are required
unsigned FunctionSections : 1; ///< Set when -ffunction-sections is enabled
unsigned HiddenWeakTemplateVTables : 1; ///< Emit weak vtables and RTTI for
///< template classes with hidden visibility
unsigned HiddenWeakVTables : 1; ///< Emit weak vtables, RTTI, and thunks with
///< hidden visibility.
unsigned InstrumentFunctions : 1; ///< Set when -finstrument-functions is
///< enabled.
unsigned InstrumentForProfiling : 1; ///< Set when -pg is enabled
unsigned LessPreciseFPMAD : 1; ///< Enable less precise MAD instructions to
///< be generated.
unsigned MergeAllConstants : 1; ///< Merge identical constants.
unsigned NoCommon : 1; ///< Set when -fno-common or C++ is enabled.
unsigned NoDwarf2CFIAsm : 1; ///< Set when -fno-dwarf2-cfi-asm is enabled.
unsigned NoDwarfDirectoryAsm : 1; ///< Set when -fno-dwarf-directory-asm is
///< enabled.
unsigned NoExecStack : 1; ///< Set when -Wa,--noexecstack is enabled.
unsigned NoGlobalMerge : 1; ///< Set when -mno-global-merge is enabled.
unsigned NoImplicitFloat : 1; ///< Set when -mno-implicit-float is enabled.
unsigned NoInfsFPMath : 1; ///< Assume FP arguments, results not +-Inf.
unsigned NoInline : 1; ///< Set when -fno-inline is enabled. Disables
///< use of the inline keyword.
unsigned NoNaNsFPMath : 1; ///< Assume FP arguments, results not NaN.
unsigned NoZeroInitializedInBSS : 1; ///< -fno-zero-initialized-in-bss
unsigned ObjCDispatchMethod : 2; ///< Method of Objective-C dispatch to use.
unsigned OmitLeafFramePointer : 1; ///< Set when -momit-leaf-frame-pointer is
///< enabled.
unsigned OptimizationLevel : 3; ///< The -O[0-4] option specified.
unsigned OptimizeSize : 2; ///< If -Os (==1) or -Oz (==2) is specified.
unsigned RelaxAll : 1; ///< Relax all machine code instructions.
unsigned RelaxedAliasing : 1; ///< Set when -fno-strict-aliasing is enabled.
unsigned SaveTempLabels : 1; ///< Save temporary labels.
unsigned SimplifyLibCalls : 1; ///< Set when -fbuiltin is enabled.
unsigned SoftFloat : 1; ///< -soft-float.
unsigned StrictEnums : 1; ///< Optimize based on strict enum definition.
unsigned TimePasses : 1; ///< Set when -ftime-report is enabled.
unsigned UnitAtATime : 1; ///< Unused. For mirroring GCC optimization
/// selection.
unsigned UnrollLoops : 1; ///< Control whether loops are unrolled.
unsigned UnsafeFPMath : 1; ///< Allow unsafe floating point optzns.
unsigned UnwindTables : 1; ///< Emit unwind tables.
/// Attempt to use register sized accesses to bit-fields in structures, when
/// possible.
unsigned UseRegisterSizedBitfieldAccess : 1;
unsigned VerifyModule : 1; ///< Control whether the module should be run
///< through the LLVM Verifier.
unsigned StackRealignment : 1; ///< Control whether to permit stack
///< realignment.
unsigned UseInitArray : 1; ///< Control whether to use .init_array or
///< .ctors.
unsigned StackAlignment; ///< Overrides default stack alignment,
///< if not 0.
/// The code model to use (-mcmodel).
std::string CodeModel;
/// The filename with path we use for coverage files. The extension will be
/// replaced.
std::string CoverageFile;
/// Enable additional debugging information.
std::string DebugPass;
/// The string to embed in debug information as the current working directory.
std::string DebugCompilationDir;
/// The kind of generated debug info.
DebugInfoKind DebugInfo;
/// The string to embed in the debug information for the compile unit, if
/// non-empty.
std::string DwarfDebugFlags;
/// The ABI to use for passing floating point arguments.
std::string FloatABI;
/// The float precision limit to use, if non-empty.
std::string LimitFloatPrecision;
/// The name of the bitcode file to link before optzns.
std::string LinkBitcodeFile;
/// The kind of inlining to perform.
InliningMethod Inlining;
/// 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 of the relocation model to use.
std::string 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 command-line options to forward to the LLVM backend.
std::vector<std::string> BackendOptions;
/// The user specified number of registers to be used for integral arguments,
/// or 0 if unspecified.
unsigned NumRegisterParameters;
/// The run-time penalty for bounds checking, or 0 to disable.
unsigned char BoundsChecking;
/// The default TLS model to use.
TLSModel DefaultTLSModel;
public:
CodeGenOptions() {
AsmVerbose = 0;
CUDAIsDevice = 0;
CXAAtExit = 1;
CXXCtorDtorAliases = 0;
DataSections = 0;
DisableFPElim = 0;
DisableLLVMOpts = 0;
DisableRedZone = 0;
DisableTailCalls = 0;
EmitDeclMetadata = 0;
EmitGcovArcs = 0;
EmitGcovNotes = 0;
EmitOpenCLArgMetadata = 0;
EmitMicrosoftInlineAsm = 0;
ForbidGuardVariables = 0;
FunctionSections = 0;
HiddenWeakTemplateVTables = 0;
HiddenWeakVTables = 0;
InstrumentFunctions = 0;
InstrumentForProfiling = 0;
LessPreciseFPMAD = 0;
MergeAllConstants = 1;
NoCommon = 0;
NoDwarf2CFIAsm = 0;
NoImplicitFloat = 0;
NoInfsFPMath = 0;
NoInline = 0;
NoNaNsFPMath = 0;
NoZeroInitializedInBSS = 0;
NumRegisterParameters = 0;
ObjCAutoRefCountExceptions = 0;
ObjCDispatchMethod = Legacy;
OmitLeafFramePointer = 0;
OptimizationLevel = 0;
OptimizeSize = 0;
RelaxAll = 0;
RelaxedAliasing = 0;
SaveTempLabels = 0;
SimplifyLibCalls = 1;
SoftFloat = 0;
StrictEnums = 0;
TimePasses = 0;
UnitAtATime = 1;
UnrollLoops = 0;
UnsafeFPMath = 0;
UnwindTables = 0;
UseRegisterSizedBitfieldAccess = 0;
VerifyModule = 1;
StackRealignment = 0;
StackAlignment = 0;
BoundsChecking = 0;
UseInitArray = 0;
DebugInfo = NoDebugInfo;
Inlining = NoInlining;
RelocationModel = "pic";
DefaultTLSModel = GeneralDynamicTLSModel;
}
ObjCDispatchMethodKind getObjCDispatchMethod() const {
return ObjCDispatchMethodKind(ObjCDispatchMethod);
}
};
} // end namespace clang
#endif