1//===--- CodeGenOptions.def - Code generation option database ----- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file defines the code generation options. Users of this file
10// must define the CODEGENOPT macro to make use of this information.
11// Optionally, the user may also define ENUM_CODEGENOPT (for options
12// that have enumeration type and VALUE_CODEGENOPT is a code
13// generation option that describes a value rather than a flag.
14//
15// AFFECTING_VALUE_CODEGENOPT is used for code generation options that can
16// affect the AST.
17//
18//===----------------------------------------------------------------------===//
19#ifndef CODEGENOPT
20# error Define the CODEGENOPT macro to handle language options
21#endif
22
23#ifndef VALUE_CODEGENOPT
24# define VALUE_CODEGENOPT(Name, Bits, Default) \
25CODEGENOPT(Name, Bits, Default)
26#endif
27
28#ifndef ENUM_CODEGENOPT
29# define ENUM_CODEGENOPT(Name, Type, Bits, Default) \
30CODEGENOPT(Name, Bits, Default)
31#endif
32
33#ifndef AFFECTING_VALUE_CODEGENOPT
34# define AFFECTING_VALUE_CODEGENOPT(Name, Bits, Default) \
35VALUE_CODEGENOPT(Name, Bits, Default)
36#endif
37
38CODEGENOPT(DisableIntegratedAS, 1, 0) ///< -no-integrated-as
39CODEGENOPT(RelaxELFRelocations, 1, 1) ///< -Wa,-mrelax-relocations={yes,no}
40CODEGENOPT(AsmVerbose , 1, 0) ///< -dA, -fverbose-asm.
41CODEGENOPT(PreserveAsmComments, 1, 1) ///< -dA, -fno-preserve-as-comments.
42CODEGENOPT(AssumeSaneOperatorNew , 1, 1) ///< implicit __attribute__((malloc)) operator new
43CODEGENOPT(AssumeUniqueVTables , 1, 1) ///< Assume a class has only one vtable.
44CODEGENOPT(Autolink , 1, 1) ///< -fno-autolink
45CODEGENOPT(AutoImport , 1, 1) ///< -fno-auto-import
46CODEGENOPT(ObjCAutoRefCountExceptions , 1, 0) ///< Whether ARC should be EH-safe.
47CODEGENOPT(Backchain , 1, 0) ///< -mbackchain
48CODEGENOPT(ControlFlowGuardNoChecks , 1, 0) ///< -cfguard-no-checks
49CODEGENOPT(ControlFlowGuard , 1, 0) ///< -cfguard
50CODEGENOPT(EHContGuard , 1, 0) ///< -ehcontguard
51CODEGENOPT(CXAAtExit , 1, 1) ///< Use __cxa_atexit for calling destructors.
52CODEGENOPT(RegisterGlobalDtorsWithAtExit, 1, 1) ///< Use atexit or __cxa_atexit to register global destructors.
53CODEGENOPT(CXXCtorDtorAliases, 1, 0) ///< Emit complete ctors/dtors as linker
54 ///< aliases to base ctors when possible.
55CODEGENOPT(DataSections , 1, 0) ///< Set when -fdata-sections is enabled.
56CODEGENOPT(UniqueSectionNames, 1, 1) ///< Set for -funique-section-names.
57CODEGENOPT(UniqueBasicBlockSectionNames, 1, 1) ///< Set for -funique-basic-block-section-names,
58 ///< Produce unique section names with
59 ///< basic block sections.
60CODEGENOPT(EnableAIXExtendedAltivecABI, 1, 0) ///< Set for -mabi=vec-extabi. Enables the extended Altivec ABI on AIX.
61CODEGENOPT(XCOFFReadOnlyPointers, 1, 0) ///< Set for -mxcoff-roptr.
62CODEGENOPT(AllTocData, 1, 0) ///< AIX -mtocdata
63ENUM_CODEGENOPT(FramePointer, FramePointerKind, 2, FramePointerKind::None) /// frame-pointer: all,non-leaf,none
64
65CODEGENOPT(ClearASTBeforeBackend , 1, 0) ///< Free the AST before running backend code generation. Only works with -disable-free.
66CODEGENOPT(DisableFree , 1, 0) ///< Don't free memory.
67CODEGENOPT(DiscardValueNames , 1, 0) ///< Discard Value Names from the IR (LLVMContext flag)
68CODEGENOPT(DisableLLVMPasses , 1, 0) ///< Don't run any LLVM IR passes to get
69 ///< the pristine IR generated by the
70 ///< frontend.
71CODEGENOPT(DisableLifetimeMarkers, 1, 0) ///< Don't emit any lifetime markers
72CODEGENOPT(DisableO0ImplyOptNone , 1, 0) ///< Don't annonate function with optnone at O0
73CODEGENOPT(ExperimentalStrictFloatingPoint, 1, 0) ///< Enables the new, experimental
74 ///< strict floating point.
75CODEGENOPT(EnableNoundefAttrs, 1, 0) ///< Enable emitting `noundef` attributes on IR call arguments and return values
76CODEGENOPT(DebugPassManager, 1, 0) ///< Prints debug information for the new
77 ///< pass manager.
78CODEGENOPT(DisableRedZone , 1, 0) ///< Set when -mno-red-zone is enabled.
79CODEGENOPT(EmitCallSiteInfo, 1, 0) ///< Emit call site info only in the case of
80 ///< '-g' + 'O>0' level.
81CODEGENOPT(IndirectTlsSegRefs, 1, 0) ///< Set when -mno-tls-direct-seg-refs
82 ///< is specified.
83CODEGENOPT(DisableTailCalls , 1, 0) ///< Do not emit tail calls.
84CODEGENOPT(NoEscapingBlockTailCalls, 1, 0) ///< Do not emit tail calls from
85 ///< escaping blocks.
86CODEGENOPT(EmitDeclMetadata , 1, 0) ///< Emit special metadata indicating what
87 ///< Decl* various IR entities came from.
88 ///< Only useful when running CodeGen as a
89 ///< subroutine.
90CODEGENOPT(EmitVersionIdentMetadata , 1, 1) ///< Emit compiler version metadata.
91CODEGENOPT(EmitOpenCLArgMetadata , 1, 0) ///< Emit OpenCL kernel arg metadata.
92CODEGENOPT(EmulatedTLS , 1, 0) ///< Set by default or -f[no-]emulated-tls.
93/// Embed Bitcode mode (off/all/bitcode/marker).
94ENUM_CODEGENOPT(EmbedBitcode, EmbedBitcodeKind, 2, Embed_Off)
95/// Inline asm dialect, -masm=(att|intel)
96ENUM_CODEGENOPT(InlineAsmDialect, InlineAsmDialectKind, 1, IAD_ATT)
97CODEGENOPT(ForbidGuardVariables , 1, 0) ///< Issue errors if C++ guard variables
98 ///< are required.
99CODEGENOPT(FunctionSections , 1, 0) ///< Set when -ffunction-sections is enabled.
100CODEGENOPT(BBAddrMap , 1, 0) ///< Set when -fbasic-block-address-map is enabled.
101CODEGENOPT(InstrumentFunctions , 1, 0) ///< Set when -finstrument-functions is
102 ///< enabled.
103CODEGENOPT(InstrumentFunctionsAfterInlining , 1, 0) ///< Set when
104 ///< -finstrument-functions-after-inlining is enabled.
105CODEGENOPT(InstrumentFunctionEntryBare , 1, 0) ///< Set when
106 ///< -finstrument-function-entry-bare is enabled.
107CODEGENOPT(CFProtectionReturn , 1, 0) ///< if -fcf-protection is
108 ///< set to full or return.
109CODEGENOPT(CFProtectionBranch , 1, 0) ///< if -fcf-protection is
110 ///< set to full or branch.
111CODEGENOPT(FunctionReturnThunks, 1, 0) ///< -mfunction-return={keep|thunk-extern}
112CODEGENOPT(IndirectBranchCSPrefix, 1, 0) ///< if -mindirect-branch-cs-prefix
113 ///< is set.
114
115CODEGENOPT(XRayInstrumentFunctions , 1, 0) ///< Set when -fxray-instrument is
116 ///< enabled.
117CODEGENOPT(StackSizeSection , 1, 0) ///< Set when -fstack-size-section is enabled.
118
119///< Set when -femit-compact-unwind-non-canonical is enabled.
120CODEGENOPT(EmitCompactUnwindNonCanonical, 1, 0)
121
122///< Set when -fxray-always-emit-customevents is enabled.
123CODEGENOPT(XRayAlwaysEmitCustomEvents , 1, 0)
124
125///< Set when -fxray-always-emit-typedevents is enabled.
126CODEGENOPT(XRayAlwaysEmitTypedEvents , 1, 0)
127
128///< Set when -fxray-ignore-loops is enabled.
129CODEGENOPT(XRayIgnoreLoops , 1, 0)
130
131///< Emit the XRay function index section.
132CODEGENOPT(XRayFunctionIndex , 1, 1)
133
134
135///< Set the minimum number of instructions in a function to determine selective
136///< XRay instrumentation.
137VALUE_CODEGENOPT(XRayInstructionThreshold , 32, 200)
138
139///< Only instrument 1 in N functions, by dividing functions into N total groups and
140///< instrumenting only the specified group at a time. Group numbers start at 0
141///< and end at N-1.
142VALUE_CODEGENOPT(XRayTotalFunctionGroups, 32, 1)
143VALUE_CODEGENOPT(XRaySelectedFunctionGroup, 32, 0)
144
145VALUE_CODEGENOPT(PatchableFunctionEntryCount , 32, 0) ///< Number of NOPs at function entry
146VALUE_CODEGENOPT(PatchableFunctionEntryOffset , 32, 0)
147
148CODEGENOPT(HotPatch, 1, 0) ///< Supports the Microsoft /HOTPATCH flag and
149 ///< generates a 'patchable-function' attribute.
150
151CODEGENOPT(JMCInstrument, 1, 0) ///< Set when -fjmc is enabled.
152CODEGENOPT(InstrumentForProfiling , 1, 0) ///< Set when -pg is enabled.
153CODEGENOPT(CallFEntry , 1, 0) ///< Set when -mfentry is enabled.
154CODEGENOPT(MNopMCount , 1, 0) ///< Set when -mnop-mcount is enabled.
155CODEGENOPT(RecordMCount , 1, 0) ///< Set when -mrecord-mcount is enabled.
156CODEGENOPT(PackedStack , 1, 0) ///< Set when -mpacked-stack is enabled.
157CODEGENOPT(LessPreciseFPMAD , 1, 0) ///< Enable less precise MAD instructions to
158 ///< be generated.
159CODEGENOPT(PrepareForLTO , 1, 0) ///< Set when -flto is enabled on the
160 ///< compile step.
161CODEGENOPT(PrepareForThinLTO , 1, 0) ///< Set when -flto=thin is enabled on the
162 ///< compile step.
163CODEGENOPT(LTOUnit, 1, 0) ///< Emit IR to support LTO unit features (CFI, whole
164 ///< program vtable opt).
165CODEGENOPT(FatLTO, 1, 0) ///< Set when -ffat-lto-objects is enabled.
166CODEGENOPT(EnableSplitLTOUnit, 1, 0) ///< Enable LTO unit splitting to support
167 /// CFI and traditional whole program
168 /// devirtualization that require whole
169 /// program IR support.
170CODEGENOPT(UnifiedLTO, 1, 0) ///< Use the unified LTO pipeline.
171CODEGENOPT(IncrementalLinkerCompatible, 1, 0) ///< Emit an object file which can
172 ///< be used with an incremental
173 ///< linker.
174CODEGENOPT(MergeAllConstants , 1, 1) ///< Merge identical constants.
175CODEGENOPT(MergeFunctions , 1, 0) ///< Set when -fmerge-functions is enabled.
176CODEGENOPT(NoCommon , 1, 0) ///< Set when -fno-common or C++ is enabled.
177CODEGENOPT(NoExecStack , 1, 0) ///< Set when -Wa,--noexecstack is enabled.
178CODEGENOPT(FatalWarnings , 1, 0) ///< Set when -Wa,--fatal-warnings is
179 ///< enabled.
180CODEGENOPT(NoWarn , 1, 0) ///< Set when -Wa,--no-warn is enabled.
181CODEGENOPT(NoTypeCheck , 1, 0) ///< Set when -Wa,--no-type-check is enabled.
182CODEGENOPT(MisExpect , 1, 0) ///< Set when -Wmisexpect is enabled
183CODEGENOPT(EnableSegmentedStacks , 1, 0) ///< Set when -fsplit-stack is enabled.
184CODEGENOPT(StackClashProtector, 1, 0) ///< Set when -fstack-clash-protection is enabled.
185CODEGENOPT(NoImplicitFloat , 1, 0) ///< Set when -mno-implicit-float is enabled.
186CODEGENOPT(NullPointerIsValid , 1, 0) ///< Assume Null pointer deference is defined.
187CODEGENOPT(OpenCLCorrectlyRoundedDivSqrt, 1, 0) ///< -cl-fp32-correctly-rounded-divide-sqrt
188CODEGENOPT(HIPCorrectlyRoundedDivSqrt, 1, 1) ///< -fno-hip-fp32-correctly-rounded-divide-sqrt
189CODEGENOPT(HIPSaveKernelArgName, 1, 0) ///< Set when -fhip-kernel-arg-name is enabled.
190CODEGENOPT(UniqueInternalLinkageNames, 1, 0) ///< Internal Linkage symbols get unique names.
191CODEGENOPT(SplitMachineFunctions, 1, 0) ///< Split machine functions using profile information.
192CODEGENOPT(PPCUseFullRegisterNames, 1, 0) ///< Print full register names in assembly
193
194/// When false, this attempts to generate code as if the result of an
195/// overflowing conversion matches the overflowing behavior of a target's native
196/// float-to-int conversion instructions.
197CODEGENOPT(StrictFloatCastOverflow, 1, 1)
198
199CODEGENOPT(NoZeroInitializedInBSS , 1, 0) ///< -fno-zero-initialized-in-bss.
200/// Method of Objective-C dispatch to use.
201ENUM_CODEGENOPT(ObjCDispatchMethod, ObjCDispatchMethodKind, 2, Legacy)
202/// Replace certain message sends with calls to ObjC runtime entrypoints
203CODEGENOPT(ObjCConvertMessagesToRuntimeCalls , 1, 1)
204CODEGENOPT(ObjCAvoidHeapifyLocalBlocks, 1, 0)
205
206
207// The optimization options affect frontend options, whicn in turn do affect the AST.
208AFFECTING_VALUE_CODEGENOPT(OptimizationLevel, 2, 0) ///< The -O[0-3] option specified.
209AFFECTING_VALUE_CODEGENOPT(OptimizeSize, 2, 0) ///< If -Os (==1) or -Oz (==2) is specified.
210
211CODEGENOPT(AtomicProfileUpdate , 1, 0) ///< Set -fprofile-update=atomic
212/// Choose profile instrumenation kind or no instrumentation.
213ENUM_CODEGENOPT(ProfileInstr, ProfileInstrKind, 2, ProfileNone)
214/// Choose profile kind for PGO use compilation.
215ENUM_CODEGENOPT(ProfileUse, ProfileInstrKind, 2, ProfileNone)
216/// Partition functions into N groups and select only functions in group i to be
217/// instrumented. Selected group numbers can be 0 to N-1 inclusive.
218VALUE_CODEGENOPT(ProfileTotalFunctionGroups, 32, 1)
219VALUE_CODEGENOPT(ProfileSelectedFunctionGroup, 32, 0)
220CODEGENOPT(CoverageMapping , 1, 0) ///< Generate coverage mapping regions to
221 ///< enable code coverage analysis.
222CODEGENOPT(DumpCoverageMapping , 1, 0) ///< Dump the generated coverage mapping
223 ///< regions.
224CODEGENOPT(MCDCCoverage , 1, 0) ///< Enable MC/DC code coverage criteria.
225
226 /// If -fpcc-struct-return or -freg-struct-return is specified.
227ENUM_CODEGENOPT(StructReturnConvention, StructReturnConventionKind, 2, SRCK_Default)
228
229CODEGENOPT(RelaxAll , 1, 0) ///< Relax all machine code instructions.
230CODEGENOPT(RelaxedAliasing , 1, 0) ///< Set when -fno-strict-aliasing is enabled.
231CODEGENOPT(StructPathTBAA , 1, 0) ///< Whether or not to use struct-path TBAA.
232CODEGENOPT(NewStructPathTBAA , 1, 0) ///< Whether or not to use enhanced struct-path TBAA.
233CODEGENOPT(SaveTempLabels , 1, 0) ///< Save temporary labels.
234CODEGENOPT(SanitizeAddressUseAfterScope , 1, 0) ///< Enable use-after-scope detection
235 ///< in AddressSanitizer
236ENUM_CODEGENOPT(SanitizeAddressUseAfterReturn,
237 llvm::AsanDetectStackUseAfterReturnMode, 2,
238 llvm::AsanDetectStackUseAfterReturnMode::Runtime
239 ) ///< Set detection mode for stack-use-after-return.
240CODEGENOPT(SanitizeAddressPoisonCustomArrayCookie, 1,
241 0) ///< Enable poisoning operator new[] which is not a replaceable
242 ///< global allocation function in AddressSanitizer
243CODEGENOPT(SanitizeAddressGlobalsDeadStripping, 1, 0) ///< Enable linker dead stripping
244 ///< of globals in AddressSanitizer
245CODEGENOPT(SanitizeAddressUseOdrIndicator, 1, 0) ///< Enable ODR indicator globals
246CODEGENOPT(SanitizeMemoryTrackOrigins, 2, 0) ///< Enable tracking origins in
247 ///< MemorySanitizer
248ENUM_CODEGENOPT(SanitizeAddressDtor, llvm::AsanDtorKind, 2,
249 llvm::AsanDtorKind::Global) ///< Set how ASan global
250 ///< destructors are emitted.
251CODEGENOPT(SanitizeMemoryParamRetval, 1, 0) ///< Enable detection of uninitialized
252 ///< parameters and return values
253 ///< in MemorySanitizer
254CODEGENOPT(SanitizeMemoryUseAfterDtor, 1, 0) ///< Enable use-after-delete detection
255 ///< in MemorySanitizer
256CODEGENOPT(SanitizeCfiCrossDso, 1, 0) ///< Enable cross-dso support in CFI.
257CODEGENOPT(SanitizeMinimalRuntime, 1, 0) ///< Use "_minimal" sanitizer runtime for
258 ///< diagnostics.
259CODEGENOPT(SanitizeCfiICallGeneralizePointers, 1, 0) ///< Generalize pointer types in
260 ///< CFI icall function signatures
261CODEGENOPT(SanitizeCfiICallNormalizeIntegers, 1, 0) ///< Normalize integer types in
262 ///< CFI icall function signatures
263CODEGENOPT(SanitizeCfiCanonicalJumpTables, 1, 0) ///< Make jump table symbols canonical
264 ///< instead of creating a local jump table.
265CODEGENOPT(SanitizeCoverageType, 2, 0) ///< Type of sanitizer coverage
266 ///< instrumentation.
267CODEGENOPT(SanitizeCoverageIndirectCalls, 1, 0) ///< Enable sanitizer coverage
268 ///< for indirect calls.
269CODEGENOPT(SanitizeCoverageTraceBB, 1, 0) ///< Enable basic block tracing in
270 ///< in sanitizer coverage.
271CODEGENOPT(SanitizeCoverageTraceCmp, 1, 0) ///< Enable cmp instruction tracing
272 ///< in sanitizer coverage.
273CODEGENOPT(SanitizeCoverageTraceDiv, 1, 0) ///< Enable div instruction tracing
274 ///< in sanitizer coverage.
275CODEGENOPT(SanitizeCoverageTraceGep, 1, 0) ///< Enable GEP instruction tracing
276 ///< in sanitizer coverage.
277CODEGENOPT(SanitizeCoverage8bitCounters, 1, 0) ///< Use 8-bit frequency counters
278 ///< in sanitizer coverage.
279CODEGENOPT(SanitizeCoverageTracePC, 1, 0) ///< Enable PC tracing
280 ///< in sanitizer coverage.
281CODEGENOPT(SanitizeCoverageTracePCGuard, 1, 0) ///< Enable PC tracing with guard
282 ///< in sanitizer coverage.
283CODEGENOPT(SanitizeCoverageInline8bitCounters, 1, 0) ///< Use inline 8bit counters.
284CODEGENOPT(SanitizeCoverageInlineBoolFlag, 1, 0) ///< Use inline bool flag.
285CODEGENOPT(SanitizeCoveragePCTable, 1, 0) ///< Create a PC Table.
286CODEGENOPT(SanitizeCoverageControlFlow, 1, 0) ///< Collect control flow
287CODEGENOPT(SanitizeCoverageNoPrune, 1, 0) ///< Disable coverage pruning.
288CODEGENOPT(SanitizeCoverageStackDepth, 1, 0) ///< Enable max stack depth tracing
289CODEGENOPT(SanitizeCoverageTraceLoads, 1, 0) ///< Enable tracing of loads.
290CODEGENOPT(SanitizeCoverageTraceStores, 1, 0) ///< Enable tracing of stores.
291CODEGENOPT(SanitizeBinaryMetadataCovered, 1, 0) ///< Emit PCs for covered functions.
292CODEGENOPT(SanitizeBinaryMetadataAtomics, 1, 0) ///< Emit PCs for atomic operations.
293CODEGENOPT(SanitizeBinaryMetadataUAR, 1, 0) ///< Emit PCs for start of functions
294 ///< that are subject for use-after-return checking.
295CODEGENOPT(SanitizeStats , 1, 0) ///< Collect statistics for sanitizers.
296CODEGENOPT(SimplifyLibCalls , 1, 1) ///< Set when -fbuiltin is enabled.
297CODEGENOPT(SoftFloat , 1, 0) ///< -soft-float.
298CODEGENOPT(SpeculativeLoadHardening, 1, 0) ///< Enable speculative load hardening.
299CODEGENOPT(FineGrainedBitfieldAccesses, 1, 0) ///< Enable fine-grained bitfield accesses.
300CODEGENOPT(StrictEnums , 1, 0) ///< Optimize based on strict enum definition.
301CODEGENOPT(StrictVTablePointers, 1, 0) ///< Optimize based on the strict vtable pointers
302CODEGENOPT(TimePasses , 1, 0) ///< Set when -ftime-report or -ftime-report= is enabled.
303CODEGENOPT(TimePassesPerRun , 1, 0) ///< Set when -ftime-report=per-pass-run is enabled.
304CODEGENOPT(TimeTrace , 1, 0) ///< Set when -ftime-trace is enabled.
305VALUE_CODEGENOPT(TimeTraceGranularity, 32, 500) ///< Minimum time granularity (in microseconds),
306 ///< traced by time profiler
307CODEGENOPT(UnrollLoops , 1, 0) ///< Control whether loops are unrolled.
308CODEGENOPT(RerollLoops , 1, 0) ///< Control whether loops are rerolled.
309CODEGENOPT(NoUseJumpTables , 1, 0) ///< Set when -fno-jump-tables is enabled.
310VALUE_CODEGENOPT(UnwindTables, 2, 0) ///< Unwind tables (1) or asynchronous unwind tables (2)
311CODEGENOPT(VectorizeLoop , 1, 0) ///< Run loop vectorizer.
312CODEGENOPT(VectorizeSLP , 1, 0) ///< Run SLP vectorizer.
313CODEGENOPT(ProfileSampleAccurate, 1, 0) ///< Sample profile is accurate.
314
315/// Treat loops as finite: language, always, never.
316ENUM_CODEGENOPT(FiniteLoops, FiniteLoopsKind, 2, FiniteLoopsKind::Language)
317
318 /// Attempt to use register sized accesses to bit-fields in structures, when
319 /// possible.
320CODEGENOPT(UseRegisterSizedBitfieldAccess , 1, 0)
321
322CODEGENOPT(VerifyModule , 1, 1) ///< Control whether the module should be run
323 ///< through the LLVM Verifier.
324CODEGENOPT(VerifyEach , 1, 1) ///< Control whether the LLVM verifier
325 ///< should run after every pass.
326
327CODEGENOPT(StackRealignment , 1, 0) ///< Control whether to force stack
328 ///< realignment.
329CODEGENOPT(UseInitArray , 1, 0) ///< Control whether to use .init_array or
330 ///< .ctors.
331VALUE_CODEGENOPT(LoopAlignment , 32, 0) ///< Overrides default loop
332 ///< alignment, if not 0.
333VALUE_CODEGENOPT(StackAlignment , 32, 0) ///< Overrides default stack
334 ///< alignment, if not 0.
335VALUE_CODEGENOPT(StackProbeSize , 32, 4096) ///< Overrides default stack
336 ///< probe size, even if 0.
337VALUE_CODEGENOPT(WarnStackSize , 32, UINT_MAX) ///< Set via -fwarn-stack-size.
338CODEGENOPT(NoStackArgProbe, 1, 0) ///< Set when -mno-stack-arg-probe is used
339CODEGENOPT(EmitLLVMUseLists, 1, 0) ///< Control whether to serialize use-lists.
340
341CODEGENOPT(WholeProgramVTables, 1, 0) ///< Whether to apply whole-program
342 /// vtable optimization.
343
344CODEGENOPT(VirtualFunctionElimination, 1, 0) ///< Whether to apply the dead
345 /// virtual function elimination
346 /// optimization.
347
348/// Whether to use public LTO visibility for entities in std and stdext
349/// namespaces. This is enabled by clang-cl's /MT and /MTd flags.
350CODEGENOPT(LTOVisibilityPublicStd, 1, 0)
351
352/// The user specified number of registers to be used for integral arguments,
353/// or 0 if unspecified.
354VALUE_CODEGENOPT(NumRegisterParameters, 32, 0)
355
356/// The threshold to put data into small data section.
357VALUE_CODEGENOPT(SmallDataLimit, 32, 0)
358
359/// The lower bound for a buffer to be considered for stack protection.
360VALUE_CODEGENOPT(SSPBufferSize, 32, 0)
361
362/// The kind of inlining to perform.
363ENUM_CODEGENOPT(Inlining, InliningMethod, 2, NormalInlining)
364
365/// The maximum stack size a function can have to be considered for inlining.
366VALUE_CODEGENOPT(InlineMaxStackSize, 32, UINT_MAX)
367
368// Vector functions library to use.
369ENUM_CODEGENOPT(VecLib, llvm::driver::VectorLibrary, 3, llvm::driver::VectorLibrary::NoLibrary)
370
371/// The default TLS model to use.
372ENUM_CODEGENOPT(DefaultTLSModel, TLSModel, 2, GeneralDynamicTLSModel)
373
374/// Whether to enable TLSDESC. AArch64 enables TLSDESC regardless of this value.
375CODEGENOPT(EnableTLSDESC, 1, 0)
376
377/// Bit size of immediate TLS offsets (0 == use the default).
378VALUE_CODEGENOPT(TLSSize, 8, 0)
379
380/// The default stack protector guard offset to use.
381VALUE_CODEGENOPT(StackProtectorGuardOffset, 32, INT_MAX)
382
383/// Number of path components to strip when emitting checks. (0 == full
384/// filename)
385VALUE_CODEGENOPT(EmitCheckPathComponentsToStrip, 32, 0)
386
387/// Whether to report the hotness of the code region for optimization remarks.
388CODEGENOPT(DiagnosticsWithHotness, 1, 0)
389
390/// Whether to use direct access relocations (instead of GOT) to reference external data symbols.
391CODEGENOPT(DirectAccessExternalData, 1, 0)
392
393/// Whether we should use the undefined behaviour optimization for control flow
394/// paths that reach the end of a function without executing a required return.
395CODEGENOPT(StrictReturn, 1, 1)
396
397/// Whether emit pseudo probes for sample pgo profile collection.
398CODEGENOPT(PseudoProbeForProfiling, 1, 0)
399
400/// Whether 3-component vector type is preserved.
401CODEGENOPT(PreserveVec3Type, 1, 0)
402
403CODEGENOPT(NoPLT, 1, 0)
404
405/// Whether to emit all vtables
406CODEGENOPT(ForceEmitVTables, 1, 0)
407
408/// Whether to emit an address-significance table into the object file.
409CODEGENOPT(Addrsig, 1, 0)
410
411/// Whether to emit unused static constants.
412CODEGENOPT(KeepStaticConsts, 1, 0)
413
414/// Whether to emit all variables that have a persistent storage duration,
415/// including global, static and thread local variables.
416CODEGENOPT(KeepPersistentStorageVariables, 1, 0)
417
418/// Whether to follow the AAPCS enforcing at least one read before storing to a volatile bitfield
419CODEGENOPT(ForceAAPCSBitfieldLoad, 1, 0)
420
421/// Assume that by-value parameters do not alias any other values.
422CODEGENOPT(PassByValueIsNoAlias, 1, 0)
423
424/// Whether to not follow the AAPCS that enforces volatile bit-field access width to be
425/// according to the field declaring type width.
426CODEGENOPT(AAPCSBitfieldWidth, 1, 1)
427
428/// Sets the IEEE bit in the expected default floating point mode register.
429/// Floating point opcodes that support exception flag gathering quiet and
430/// propagate signaling NaN inputs per IEEE 754-2008 (AMDGPU Only)
431CODEGENOPT(EmitIEEENaNCompliantInsts, 1, 1)
432
433// Whether to emit Swift Async function extended frame information: auto,
434// never, always.
435ENUM_CODEGENOPT(SwiftAsyncFramePointer, SwiftAsyncFramePointerKind, 2,
436 SwiftAsyncFramePointerKind::Always)
437
438/// Whether to skip RAX setup when passing variable arguments (x86 only).
439CODEGENOPT(SkipRaxSetup, 1, 0)
440
441/// Whether to zero out caller-used registers before returning.
442ENUM_CODEGENOPT(ZeroCallUsedRegs, llvm::ZeroCallUsedRegs::ZeroCallUsedRegsKind,
443 5, llvm::ZeroCallUsedRegs::ZeroCallUsedRegsKind::Skip)
444
445/// Modify C++ ABI to returning `this` pointer from constructors and
446/// non-deleting destructors. (No effect on Microsoft ABI.)
447CODEGENOPT(CtorDtorReturnThis, 1, 0)
448
449/// FIXME: Make DebugOptions its own top-level .def file.
450#include "DebugOptions.def"
451
452#undef CODEGENOPT
453#undef ENUM_CODEGENOPT
454#undef VALUE_CODEGENOPT
455#undef AFFECTING_VALUE_CODEGENOPT
456

source code of clang/include/clang/Basic/CodeGenOptions.def