1//===--- CodeGenOptions.def - Code generation option database ------ C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file defines the code generation options. Users of this file
11// must define the CODEGENOPT macro to make use of this information.
12// Optionally, the user may also define ENUM_CODEGENOPT (for options
13// that have enumeration type and VALUE_CODEGENOPT is a code
14// generation option that describes a value rather than a flag.
15//
16//===----------------------------------------------------------------------===//
17#ifndef CODEGENOPT
18#  error Define the CODEGENOPT macro to handle language options
19#endif
20
21#ifndef VALUE_CODEGENOPT
22#  define VALUE_CODEGENOPT(Name, Bits, Default) \
23CODEGENOPT(Name, Bits, Default)
24#endif
25
26#ifndef ENUM_CODEGENOPT
27#  define ENUM_CODEGENOPT(Name, Type, Bits, Default) \
28CODEGENOPT(Name, Bits, Default)
29#endif
30
31CODEGENOPT(DisableIntegratedAS, 1, 0) ///< -no-integrated-as
32CODEGENOPT(CompressDebugSections, 1, 0) ///< -Wa,-compress-debug-sections
33CODEGENOPT(Autolink          , 1, 1) ///< -fno-autolink
34CODEGENOPT(AsmVerbose        , 1, 0) ///< -dA, -fverbose-asm.
35CODEGENOPT(ObjCAutoRefCountExceptions , 1, 0) ///< Whether ARC should be EH-safe.
36CODEGENOPT(CoverageExtraChecksum, 1, 0) ///< Whether we need a second checksum for functions in GCNO files.
37CODEGENOPT(CoverageNoFunctionNamesInData, 1, 0) ///< Do not include function names in GCDA files.
38CODEGENOPT(CUDAIsDevice      , 1, 0) ///< Set when compiling for CUDA device.
39CODEGENOPT(CXAAtExit         , 1, 1) ///< Use __cxa_atexit for calling destructors.
40CODEGENOPT(CXXCtorDtorAliases, 1, 0) ///< Emit complete ctors/dtors as linker
41                                     ///< aliases to base ctors when possible.
42CODEGENOPT(DataSections      , 1, 0) ///< Set when -fdata-sections is enabled.
43CODEGENOPT(DisableFPElim     , 1, 0) ///< Set when -fomit-frame-pointer is enabled.
44CODEGENOPT(DisableFree       , 1, 0) ///< Don't free memory.
45CODEGENOPT(DisableGCov       , 1, 0) ///< Don't run the GCov pass, for testing.
46CODEGENOPT(DisableLLVMOpts   , 1, 0) ///< Don't run any optimizations, for use in
47                                     ///< getting .bc files that correspond to the
48                                     ///< internal state before optimizations are
49                                     ///< done.
50CODEGENOPT(DisableRedZone    , 1, 0) ///< Set when -mno-red-zone is enabled.
51CODEGENOPT(DisableTailCalls  , 1, 0) ///< Do not emit tail calls.
52CODEGENOPT(EmitDeclMetadata  , 1, 0) ///< Emit special metadata indicating what
53                                     ///< Decl* various IR entities came from. 
54                                     ///< Only useful when running CodeGen as a
55                                     ///< subroutine.
56CODEGENOPT(EmitGcovArcs      , 1, 0) ///< Emit coverage data files, aka. GCDA.
57CODEGENOPT(EmitGcovNotes     , 1, 0) ///< Emit coverage "notes" files, aka GCNO.
58CODEGENOPT(EmitOpenCLArgMetadata , 1, 0) ///< Emit OpenCL kernel arg metadata.
59/// \brief FP_CONTRACT mode (on/off/fast).
60ENUM_CODEGENOPT(FPContractMode, FPContractModeKind, 2, FPC_On)
61CODEGENOPT(ForbidGuardVariables , 1, 0) ///< Issue errors if C++ guard variables
62                                        ///< are required.
63CODEGENOPT(FunctionSections  , 1, 0) ///< Set when -ffunction-sections is enabled.
64CODEGENOPT(InstrumentFunctions , 1, 0) ///< Set when -finstrument-functions is
65                                       ///< enabled.
66CODEGENOPT(InstrumentForProfiling , 1, 0) ///< Set when -pg is enabled.
67CODEGENOPT(LessPreciseFPMAD  , 1, 0) ///< Enable less precise MAD instructions to
68                                     ///< be generated.
69CODEGENOPT(MergeAllConstants , 1, 1) ///< Merge identical constants.
70CODEGENOPT(NoCommon          , 1, 0) ///< Set when -fno-common or C++ is enabled.
71CODEGENOPT(NoDwarfDirectoryAsm , 1, 0) ///< Set when -fno-dwarf-directory-asm is
72                                       ///< enabled.
73CODEGENOPT(NoExecStack       , 1, 0) ///< Set when -Wa,--noexecstack is enabled.
74CODEGENOPT(EnableSegmentedStacks , 1, 0) ///< Set when -fsplit-stack is enabled.
75CODEGENOPT(NoGlobalMerge     , 1, 0) ///< Set when -mno-global-merge is enabled.
76CODEGENOPT(NoImplicitFloat   , 1, 0) ///< Set when -mno-implicit-float is enabled.
77CODEGENOPT(NoInfsFPMath      , 1, 0) ///< Assume FP arguments, results not +-Inf.
78CODEGENOPT(NoInline          , 1, 0) ///< Set when -fno-inline is enabled. 
79                                     ///< Disables use of the inline keyword.
80CODEGENOPT(NoNaNsFPMath      , 1, 0) ///< Assume FP arguments, results not NaN.
81CODEGENOPT(NoZeroInitializedInBSS , 1, 0) ///< -fno-zero-initialized-in-bss.
82/// \brief Method of Objective-C dispatch to use.
83ENUM_CODEGENOPT(ObjCDispatchMethod, ObjCDispatchMethodKind, 2, Legacy) 
84CODEGENOPT(OmitLeafFramePointer , 1, 0) ///< Set when -momit-leaf-frame-pointer is
85                                        ///< enabled.
86VALUE_CODEGENOPT(OptimizationLevel, 3, 0) ///< The -O[0-4] option specified.
87VALUE_CODEGENOPT(OptimizeSize, 2, 0) ///< If -Os (==1) or -Oz (==2) is specified.
88
89CODEGENOPT(ProfileInstrGenerate , 1, 0) ///< Instrument code to generate
90                                        ///< execution counts to use with PGO.
91
92  /// If -fpcc-struct-return or -freg-struct-return is specified.
93ENUM_CODEGENOPT(StructReturnConvention, StructReturnConventionKind, 2, SRCK_Default)
94
95CODEGENOPT(RelaxAll          , 1, 0) ///< Relax all machine code instructions.
96CODEGENOPT(RelaxedAliasing   , 1, 0) ///< Set when -fno-strict-aliasing is enabled.
97CODEGENOPT(StructPathTBAA    , 1, 0) ///< Whether or not to use struct-path TBAA.
98CODEGENOPT(SaveTempLabels    , 1, 0) ///< Save temporary labels.
99CODEGENOPT(SanitizeAddressZeroBaseShadow , 1, 0) ///< Map shadow memory at zero
100                                                 ///< offset in AddressSanitizer.
101CODEGENOPT(SanitizeMemoryTrackOrigins, 2, 0) ///< Enable tracking origins in
102                                             ///< MemorySanitizer
103CODEGENOPT(SanitizeUndefinedTrapOnError, 1, 0) ///< Set on
104                                               /// -fsanitize-undefined-trap-on-error
105CODEGENOPT(SimplifyLibCalls  , 1, 1) ///< Set when -fbuiltin is enabled.
106CODEGENOPT(SoftFloat         , 1, 0) ///< -soft-float.
107CODEGENOPT(StrictEnums       , 1, 0) ///< Optimize based on strict enum definition.
108CODEGENOPT(TimePasses        , 1, 0) ///< Set when -ftime-report is enabled.
109CODEGENOPT(UnitAtATime       , 1, 1) ///< Unused. For mirroring GCC optimization
110                                     ///< selection.
111CODEGENOPT(UnrollLoops       , 1, 0) ///< Control whether loops are unrolled.
112CODEGENOPT(RerollLoops       , 1, 0) ///< Control whether loops are rerolled.
113CODEGENOPT(UnsafeFPMath      , 1, 0) ///< Allow unsafe floating point optzns.
114CODEGENOPT(UnwindTables      , 1, 0) ///< Emit unwind tables.
115CODEGENOPT(VectorizeBB       , 1, 0) ///< Run basic block vectorizer.
116CODEGENOPT(VectorizeLoop     , 1, 0) ///< Run loop vectorizer.
117CODEGENOPT(VectorizeSLP      , 1, 0) ///< Run SLP vectorizer.
118
119  /// Attempt to use register sized accesses to bit-fields in structures, when
120  /// possible.
121CODEGENOPT(UseRegisterSizedBitfieldAccess , 1, 0)
122
123CODEGENOPT(VerifyModule      , 1, 1) ///< Control whether the module should be run
124                                     ///< through the LLVM Verifier.
125
126CODEGENOPT(StackRealignment  , 1, 0) ///< Control whether to permit stack
127                                     ///< realignment.
128CODEGENOPT(UseInitArray      , 1, 0) ///< Control whether to use .init_array or
129                                     ///< .ctors.
130VALUE_CODEGENOPT(StackAlignment    , 32, 0) ///< Overrides default stack 
131                                            ///< alignment, if not 0.
132CODEGENOPT(DebugColumnInfo, 1, 0) ///< Whether or not to use column information
133                                  ///< in debug info.
134
135/// The user specified number of registers to be used for integral arguments,
136/// or 0 if unspecified.
137VALUE_CODEGENOPT(NumRegisterParameters, 32, 0)
138
139/// The lower bound for a buffer to be considered for stack protection.
140VALUE_CODEGENOPT(SSPBufferSize, 32, 0)
141
142/// The kind of generated debug info.
143ENUM_CODEGENOPT(DebugInfo, DebugInfoKind, 3, NoDebugInfo)
144
145/// Dwarf version.
146VALUE_CODEGENOPT(DwarfVersion, 3, 0)
147
148/// The kind of inlining to perform.
149ENUM_CODEGENOPT(Inlining, InliningMethod, 2, NoInlining)
150
151/// The default TLS model to use.
152ENUM_CODEGENOPT(DefaultTLSModel, TLSModel, 2, GeneralDynamicTLSModel)
153
154CODEGENOPT(SanitizeRecover, 1, 1) ///< Attempt to recover from sanitizer checks
155                                  ///< by continuing execution when possible
156
157#undef CODEGENOPT
158#undef ENUM_CODEGENOPT
159#undef VALUE_CODEGENOPT
160
161