1 | //===-- CommandFlags.cpp - Command Line Flags Interface ---------*- 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 contains codegen-specific flags that are shared between different |
10 | // command line tools. The tools "llc" and "opt" both use this file to prevent |
11 | // flag duplication. |
12 | // |
13 | //===----------------------------------------------------------------------===// |
14 | |
15 | #include "llvm/CodeGen/CommandFlags.h" |
16 | #include "llvm/ADT/StringExtras.h" |
17 | #include "llvm/IR/Instructions.h" |
18 | #include "llvm/IR/Intrinsics.h" |
19 | #include "llvm/IR/Module.h" |
20 | #include "llvm/MC/MCTargetOptionsCommandFlags.h" |
21 | #include "llvm/MC/TargetRegistry.h" |
22 | #include "llvm/Support/CommandLine.h" |
23 | #include "llvm/Support/MemoryBuffer.h" |
24 | #include "llvm/Target/TargetMachine.h" |
25 | #include "llvm/TargetParser/Host.h" |
26 | #include "llvm/TargetParser/SubtargetFeature.h" |
27 | #include "llvm/TargetParser/Triple.h" |
28 | #include <optional> |
29 | |
30 | using namespace llvm; |
31 | |
32 | #define CGOPT(TY, NAME) \ |
33 | static cl::opt<TY> *NAME##View; \ |
34 | TY codegen::get##NAME() { \ |
35 | assert(NAME##View && "RegisterCodeGenFlags not created."); \ |
36 | return *NAME##View; \ |
37 | } |
38 | |
39 | #define CGLIST(TY, NAME) \ |
40 | static cl::list<TY> *NAME##View; \ |
41 | std::vector<TY> codegen::get##NAME() { \ |
42 | assert(NAME##View && "RegisterCodeGenFlags not created."); \ |
43 | return *NAME##View; \ |
44 | } |
45 | |
46 | // Temporary macro for incremental transition to std::optional. |
47 | #define CGOPT_EXP(TY, NAME) \ |
48 | CGOPT(TY, NAME) \ |
49 | std::optional<TY> codegen::getExplicit##NAME() { \ |
50 | if (NAME##View->getNumOccurrences()) { \ |
51 | TY res = *NAME##View; \ |
52 | return res; \ |
53 | } \ |
54 | return std::nullopt; \ |
55 | } |
56 | |
57 | CGOPT(std::string, MArch) |
58 | CGOPT(std::string, MCPU) |
59 | CGLIST(std::string, MAttrs) |
60 | CGOPT_EXP(Reloc::Model, RelocModel) |
61 | CGOPT(ThreadModel::Model, ThreadModel) |
62 | CGOPT_EXP(CodeModel::Model, CodeModel) |
63 | CGOPT_EXP(uint64_t, LargeDataThreshold) |
64 | CGOPT(ExceptionHandling, ExceptionModel) |
65 | CGOPT_EXP(CodeGenFileType, FileType) |
66 | CGOPT(FramePointerKind, FramePointerUsage) |
67 | CGOPT(bool, EnableUnsafeFPMath) |
68 | CGOPT(bool, EnableNoInfsFPMath) |
69 | CGOPT(bool, EnableNoNaNsFPMath) |
70 | CGOPT(bool, EnableNoSignedZerosFPMath) |
71 | CGOPT(bool, EnableApproxFuncFPMath) |
72 | CGOPT(bool, EnableNoTrappingFPMath) |
73 | CGOPT(bool, EnableAIXExtendedAltivecABI) |
74 | CGOPT(DenormalMode::DenormalModeKind, DenormalFPMath) |
75 | CGOPT(DenormalMode::DenormalModeKind, DenormalFP32Math) |
76 | CGOPT(bool, EnableHonorSignDependentRoundingFPMath) |
77 | CGOPT(FloatABI::ABIType, FloatABIForCalls) |
78 | CGOPT(FPOpFusion::FPOpFusionMode, FuseFPOps) |
79 | CGOPT(SwiftAsyncFramePointerMode, SwiftAsyncFramePointer) |
80 | CGOPT(bool, DontPlaceZerosInBSS) |
81 | CGOPT(bool, EnableGuaranteedTailCallOpt) |
82 | CGOPT(bool, DisableTailCalls) |
83 | CGOPT(bool, StackSymbolOrdering) |
84 | CGOPT(bool, StackRealign) |
85 | CGOPT(std::string, TrapFuncName) |
86 | CGOPT(bool, UseCtors) |
87 | CGOPT(bool, DisableIntegratedAS) |
88 | CGOPT_EXP(bool, DataSections) |
89 | CGOPT_EXP(bool, FunctionSections) |
90 | CGOPT(bool, IgnoreXCOFFVisibility) |
91 | CGOPT(bool, XCOFFTracebackTable) |
92 | CGOPT(bool, EnableBBAddrMap) |
93 | CGOPT(std::string, BBSections) |
94 | CGOPT(unsigned, TLSSize) |
95 | CGOPT_EXP(bool, EmulatedTLS) |
96 | CGOPT_EXP(bool, EnableTLSDESC) |
97 | CGOPT(bool, UniqueSectionNames) |
98 | CGOPT(bool, UniqueBasicBlockSectionNames) |
99 | CGOPT(EABI, EABIVersion) |
100 | CGOPT(DebuggerKind, DebuggerTuningOpt) |
101 | CGOPT(bool, EnableStackSizeSection) |
102 | CGOPT(bool, EnableAddrsig) |
103 | CGOPT(bool, EmitCallSiteInfo) |
104 | CGOPT(bool, EnableMachineFunctionSplitter) |
105 | CGOPT(bool, EnableDebugEntryValues) |
106 | CGOPT(bool, ForceDwarfFrameSection) |
107 | CGOPT(bool, XRayFunctionIndex) |
108 | CGOPT(bool, DebugStrictDwarf) |
109 | CGOPT(unsigned, AlignLoops) |
110 | CGOPT(bool, JMCInstrument) |
111 | CGOPT(bool, XCOFFReadOnlyPointers) |
112 | |
113 | codegen::RegisterCodeGenFlags::RegisterCodeGenFlags() { |
114 | #define CGBINDOPT(NAME) \ |
115 | do { \ |
116 | NAME##View = std::addressof(NAME); \ |
117 | } while (0) |
118 | |
119 | static cl::opt<std::string> MArch( |
120 | "march" , cl::desc("Architecture to generate code for (see --version)" )); |
121 | CGBINDOPT(MArch); |
122 | |
123 | static cl::opt<std::string> MCPU( |
124 | "mcpu" , cl::desc("Target a specific cpu type (-mcpu=help for details)" ), |
125 | cl::value_desc("cpu-name" ), cl::init(Val: "" )); |
126 | CGBINDOPT(MCPU); |
127 | |
128 | static cl::list<std::string> MAttrs( |
129 | "mattr" , cl::CommaSeparated, |
130 | cl::desc("Target specific attributes (-mattr=help for details)" ), |
131 | cl::value_desc("a1,+a2,-a3,..." )); |
132 | CGBINDOPT(MAttrs); |
133 | |
134 | static cl::opt<Reloc::Model> RelocModel( |
135 | "relocation-model" , cl::desc("Choose relocation model" ), |
136 | cl::values( |
137 | clEnumValN(Reloc::Static, "static" , "Non-relocatable code" ), |
138 | clEnumValN(Reloc::PIC_, "pic" , |
139 | "Fully relocatable, position independent code" ), |
140 | clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic" , |
141 | "Relocatable external references, non-relocatable code" ), |
142 | clEnumValN( |
143 | Reloc::ROPI, "ropi" , |
144 | "Code and read-only data relocatable, accessed PC-relative" ), |
145 | clEnumValN( |
146 | Reloc::RWPI, "rwpi" , |
147 | "Read-write data relocatable, accessed relative to static base" ), |
148 | clEnumValN(Reloc::ROPI_RWPI, "ropi-rwpi" , |
149 | "Combination of ropi and rwpi" ))); |
150 | CGBINDOPT(RelocModel); |
151 | |
152 | static cl::opt<ThreadModel::Model> ThreadModel( |
153 | "thread-model" , cl::desc("Choose threading model" ), |
154 | cl::init(Val: ThreadModel::POSIX), |
155 | cl::values( |
156 | clEnumValN(ThreadModel::POSIX, "posix" , "POSIX thread model" ), |
157 | clEnumValN(ThreadModel::Single, "single" , "Single thread model" ))); |
158 | CGBINDOPT(ThreadModel); |
159 | |
160 | static cl::opt<CodeModel::Model> CodeModel( |
161 | "code-model" , cl::desc("Choose code model" ), |
162 | cl::values(clEnumValN(CodeModel::Tiny, "tiny" , "Tiny code model" ), |
163 | clEnumValN(CodeModel::Small, "small" , "Small code model" ), |
164 | clEnumValN(CodeModel::Kernel, "kernel" , "Kernel code model" ), |
165 | clEnumValN(CodeModel::Medium, "medium" , "Medium code model" ), |
166 | clEnumValN(CodeModel::Large, "large" , "Large code model" ))); |
167 | CGBINDOPT(CodeModel); |
168 | |
169 | static cl::opt<uint64_t> LargeDataThreshold( |
170 | "large-data-threshold" , |
171 | cl::desc("Choose large data threshold for x86_64 medium code model" ), |
172 | cl::init(Val: 0)); |
173 | CGBINDOPT(LargeDataThreshold); |
174 | |
175 | static cl::opt<ExceptionHandling> ExceptionModel( |
176 | "exception-model" , cl::desc("exception model" ), |
177 | cl::init(Val: ExceptionHandling::None), |
178 | cl::values( |
179 | clEnumValN(ExceptionHandling::None, "default" , |
180 | "default exception handling model" ), |
181 | clEnumValN(ExceptionHandling::DwarfCFI, "dwarf" , |
182 | "DWARF-like CFI based exception handling" ), |
183 | clEnumValN(ExceptionHandling::SjLj, "sjlj" , |
184 | "SjLj exception handling" ), |
185 | clEnumValN(ExceptionHandling::ARM, "arm" , "ARM EHABI exceptions" ), |
186 | clEnumValN(ExceptionHandling::WinEH, "wineh" , |
187 | "Windows exception model" ), |
188 | clEnumValN(ExceptionHandling::Wasm, "wasm" , |
189 | "WebAssembly exception handling" ))); |
190 | CGBINDOPT(ExceptionModel); |
191 | |
192 | static cl::opt<CodeGenFileType> FileType( |
193 | "filetype" , cl::init(Val: CodeGenFileType::AssemblyFile), |
194 | cl::desc( |
195 | "Choose a file type (not all types are supported by all targets):" ), |
196 | cl::values(clEnumValN(CodeGenFileType::AssemblyFile, "asm" , |
197 | "Emit an assembly ('.s') file" ), |
198 | clEnumValN(CodeGenFileType::ObjectFile, "obj" , |
199 | "Emit a native object ('.o') file" ), |
200 | clEnumValN(CodeGenFileType::Null, "null" , |
201 | "Emit nothing, for performance testing" ))); |
202 | CGBINDOPT(FileType); |
203 | |
204 | static cl::opt<FramePointerKind> FramePointerUsage( |
205 | "frame-pointer" , |
206 | cl::desc("Specify frame pointer elimination optimization" ), |
207 | cl::init(Val: FramePointerKind::None), |
208 | cl::values( |
209 | clEnumValN(FramePointerKind::All, "all" , |
210 | "Disable frame pointer elimination" ), |
211 | clEnumValN(FramePointerKind::NonLeaf, "non-leaf" , |
212 | "Disable frame pointer elimination for non-leaf frame" ), |
213 | clEnumValN(FramePointerKind::None, "none" , |
214 | "Enable frame pointer elimination" ))); |
215 | CGBINDOPT(FramePointerUsage); |
216 | |
217 | static cl::opt<bool> EnableUnsafeFPMath( |
218 | "enable-unsafe-fp-math" , |
219 | cl::desc("Enable optimizations that may decrease FP precision" ), |
220 | cl::init(Val: false)); |
221 | CGBINDOPT(EnableUnsafeFPMath); |
222 | |
223 | static cl::opt<bool> EnableNoInfsFPMath( |
224 | "enable-no-infs-fp-math" , |
225 | cl::desc("Enable FP math optimizations that assume no +-Infs" ), |
226 | cl::init(Val: false)); |
227 | CGBINDOPT(EnableNoInfsFPMath); |
228 | |
229 | static cl::opt<bool> EnableNoNaNsFPMath( |
230 | "enable-no-nans-fp-math" , |
231 | cl::desc("Enable FP math optimizations that assume no NaNs" ), |
232 | cl::init(Val: false)); |
233 | CGBINDOPT(EnableNoNaNsFPMath); |
234 | |
235 | static cl::opt<bool> EnableNoSignedZerosFPMath( |
236 | "enable-no-signed-zeros-fp-math" , |
237 | cl::desc("Enable FP math optimizations that assume " |
238 | "the sign of 0 is insignificant" ), |
239 | cl::init(Val: false)); |
240 | CGBINDOPT(EnableNoSignedZerosFPMath); |
241 | |
242 | static cl::opt<bool> EnableApproxFuncFPMath( |
243 | "enable-approx-func-fp-math" , |
244 | cl::desc("Enable FP math optimizations that assume approx func" ), |
245 | cl::init(Val: false)); |
246 | CGBINDOPT(EnableApproxFuncFPMath); |
247 | |
248 | static cl::opt<bool> EnableNoTrappingFPMath( |
249 | "enable-no-trapping-fp-math" , |
250 | cl::desc("Enable setting the FP exceptions build " |
251 | "attribute not to use exceptions" ), |
252 | cl::init(Val: false)); |
253 | CGBINDOPT(EnableNoTrappingFPMath); |
254 | |
255 | static const auto DenormFlagEnumOptions = cl::values( |
256 | clEnumValN(DenormalMode::IEEE, "ieee" , "IEEE 754 denormal numbers" ), |
257 | clEnumValN(DenormalMode::PreserveSign, "preserve-sign" , |
258 | "the sign of a flushed-to-zero number is preserved " |
259 | "in the sign of 0" ), |
260 | clEnumValN(DenormalMode::PositiveZero, "positive-zero" , |
261 | "denormals are flushed to positive zero" ), |
262 | clEnumValN(DenormalMode::Dynamic, "dynamic" , |
263 | "denormals have unknown treatment" )); |
264 | |
265 | // FIXME: Doesn't have way to specify separate input and output modes. |
266 | static cl::opt<DenormalMode::DenormalModeKind> DenormalFPMath( |
267 | "denormal-fp-math" , |
268 | cl::desc("Select which denormal numbers the code is permitted to require" ), |
269 | cl::init(Val: DenormalMode::IEEE), |
270 | DenormFlagEnumOptions); |
271 | CGBINDOPT(DenormalFPMath); |
272 | |
273 | static cl::opt<DenormalMode::DenormalModeKind> DenormalFP32Math( |
274 | "denormal-fp-math-f32" , |
275 | cl::desc("Select which denormal numbers the code is permitted to require for float" ), |
276 | cl::init(Val: DenormalMode::Invalid), |
277 | DenormFlagEnumOptions); |
278 | CGBINDOPT(DenormalFP32Math); |
279 | |
280 | static cl::opt<bool> EnableHonorSignDependentRoundingFPMath( |
281 | "enable-sign-dependent-rounding-fp-math" , cl::Hidden, |
282 | cl::desc("Force codegen to assume rounding mode can change dynamically" ), |
283 | cl::init(Val: false)); |
284 | CGBINDOPT(EnableHonorSignDependentRoundingFPMath); |
285 | |
286 | static cl::opt<FloatABI::ABIType> FloatABIForCalls( |
287 | "float-abi" , cl::desc("Choose float ABI type" ), |
288 | cl::init(Val: FloatABI::Default), |
289 | cl::values(clEnumValN(FloatABI::Default, "default" , |
290 | "Target default float ABI type" ), |
291 | clEnumValN(FloatABI::Soft, "soft" , |
292 | "Soft float ABI (implied by -soft-float)" ), |
293 | clEnumValN(FloatABI::Hard, "hard" , |
294 | "Hard float ABI (uses FP registers)" ))); |
295 | CGBINDOPT(FloatABIForCalls); |
296 | |
297 | static cl::opt<FPOpFusion::FPOpFusionMode> FuseFPOps( |
298 | "fp-contract" , cl::desc("Enable aggressive formation of fused FP ops" ), |
299 | cl::init(Val: FPOpFusion::Standard), |
300 | cl::values( |
301 | clEnumValN(FPOpFusion::Fast, "fast" , |
302 | "Fuse FP ops whenever profitable" ), |
303 | clEnumValN(FPOpFusion::Standard, "on" , "Only fuse 'blessed' FP ops." ), |
304 | clEnumValN(FPOpFusion::Strict, "off" , |
305 | "Only fuse FP ops when the result won't be affected." ))); |
306 | CGBINDOPT(FuseFPOps); |
307 | |
308 | static cl::opt<SwiftAsyncFramePointerMode> SwiftAsyncFramePointer( |
309 | "swift-async-fp" , |
310 | cl::desc("Determine when the Swift async frame pointer should be set" ), |
311 | cl::init(Val: SwiftAsyncFramePointerMode::Always), |
312 | cl::values(clEnumValN(SwiftAsyncFramePointerMode::DeploymentBased, "auto" , |
313 | "Determine based on deployment target" ), |
314 | clEnumValN(SwiftAsyncFramePointerMode::Always, "always" , |
315 | "Always set the bit" ), |
316 | clEnumValN(SwiftAsyncFramePointerMode::Never, "never" , |
317 | "Never set the bit" ))); |
318 | CGBINDOPT(SwiftAsyncFramePointer); |
319 | |
320 | static cl::opt<bool> DontPlaceZerosInBSS( |
321 | "nozero-initialized-in-bss" , |
322 | cl::desc("Don't place zero-initialized symbols into bss section" ), |
323 | cl::init(Val: false)); |
324 | CGBINDOPT(DontPlaceZerosInBSS); |
325 | |
326 | static cl::opt<bool> EnableAIXExtendedAltivecABI( |
327 | "vec-extabi" , cl::desc("Enable the AIX Extended Altivec ABI." ), |
328 | cl::init(Val: false)); |
329 | CGBINDOPT(EnableAIXExtendedAltivecABI); |
330 | |
331 | static cl::opt<bool> EnableGuaranteedTailCallOpt( |
332 | "tailcallopt" , |
333 | cl::desc( |
334 | "Turn fastcc calls into tail calls by (potentially) changing ABI." ), |
335 | cl::init(Val: false)); |
336 | CGBINDOPT(EnableGuaranteedTailCallOpt); |
337 | |
338 | static cl::opt<bool> DisableTailCalls( |
339 | "disable-tail-calls" , cl::desc("Never emit tail calls" ), cl::init(Val: false)); |
340 | CGBINDOPT(DisableTailCalls); |
341 | |
342 | static cl::opt<bool> StackSymbolOrdering( |
343 | "stack-symbol-ordering" , cl::desc("Order local stack symbols." ), |
344 | cl::init(Val: true)); |
345 | CGBINDOPT(StackSymbolOrdering); |
346 | |
347 | static cl::opt<bool> StackRealign( |
348 | "stackrealign" , |
349 | cl::desc("Force align the stack to the minimum alignment" ), |
350 | cl::init(Val: false)); |
351 | CGBINDOPT(StackRealign); |
352 | |
353 | static cl::opt<std::string> TrapFuncName( |
354 | "trap-func" , cl::Hidden, |
355 | cl::desc("Emit a call to trap function rather than a trap instruction" ), |
356 | cl::init(Val: "" )); |
357 | CGBINDOPT(TrapFuncName); |
358 | |
359 | static cl::opt<bool> UseCtors("use-ctors" , |
360 | cl::desc("Use .ctors instead of .init_array." ), |
361 | cl::init(Val: false)); |
362 | CGBINDOPT(UseCtors); |
363 | |
364 | static cl::opt<bool> DataSections( |
365 | "data-sections" , cl::desc("Emit data into separate sections" ), |
366 | cl::init(Val: false)); |
367 | CGBINDOPT(DataSections); |
368 | |
369 | static cl::opt<bool> FunctionSections( |
370 | "function-sections" , cl::desc("Emit functions into separate sections" ), |
371 | cl::init(Val: false)); |
372 | CGBINDOPT(FunctionSections); |
373 | |
374 | static cl::opt<bool> IgnoreXCOFFVisibility( |
375 | "ignore-xcoff-visibility" , |
376 | cl::desc("Not emit the visibility attribute for asm in AIX OS or give " |
377 | "all symbols 'unspecified' visibility in XCOFF object file" ), |
378 | cl::init(Val: false)); |
379 | CGBINDOPT(IgnoreXCOFFVisibility); |
380 | |
381 | static cl::opt<bool> XCOFFTracebackTable( |
382 | "xcoff-traceback-table" , cl::desc("Emit the XCOFF traceback table" ), |
383 | cl::init(Val: true)); |
384 | CGBINDOPT(XCOFFTracebackTable); |
385 | |
386 | static cl::opt<bool> EnableBBAddrMap( |
387 | "basic-block-address-map" , |
388 | cl::desc("Emit the basic block address map section" ), cl::init(Val: false)); |
389 | CGBINDOPT(EnableBBAddrMap); |
390 | |
391 | static cl::opt<std::string> BBSections( |
392 | "basic-block-sections" , |
393 | cl::desc("Emit basic blocks into separate sections" ), |
394 | cl::value_desc("all | <function list (file)> | labels | none" ), |
395 | cl::init(Val: "none" )); |
396 | CGBINDOPT(BBSections); |
397 | |
398 | static cl::opt<unsigned> TLSSize( |
399 | "tls-size" , cl::desc("Bit size of immediate TLS offsets" ), cl::init(Val: 0)); |
400 | CGBINDOPT(TLSSize); |
401 | |
402 | static cl::opt<bool> EmulatedTLS( |
403 | "emulated-tls" , cl::desc("Use emulated TLS model" ), cl::init(Val: false)); |
404 | CGBINDOPT(EmulatedTLS); |
405 | |
406 | static cl::opt<bool> EnableTLSDESC( |
407 | "enable-tlsdesc" , cl::desc("Enable the use of TLS Descriptors" ), |
408 | cl::init(Val: false)); |
409 | CGBINDOPT(EnableTLSDESC); |
410 | |
411 | static cl::opt<bool> UniqueSectionNames( |
412 | "unique-section-names" , cl::desc("Give unique names to every section" ), |
413 | cl::init(Val: true)); |
414 | CGBINDOPT(UniqueSectionNames); |
415 | |
416 | static cl::opt<bool> UniqueBasicBlockSectionNames( |
417 | "unique-basic-block-section-names" , |
418 | cl::desc("Give unique names to every basic block section" ), |
419 | cl::init(Val: false)); |
420 | CGBINDOPT(UniqueBasicBlockSectionNames); |
421 | |
422 | static cl::opt<EABI> EABIVersion( |
423 | "meabi" , cl::desc("Set EABI type (default depends on triple):" ), |
424 | cl::init(Val: EABI::Default), |
425 | cl::values( |
426 | clEnumValN(EABI::Default, "default" , "Triple default EABI version" ), |
427 | clEnumValN(EABI::EABI4, "4" , "EABI version 4" ), |
428 | clEnumValN(EABI::EABI5, "5" , "EABI version 5" ), |
429 | clEnumValN(EABI::GNU, "gnu" , "EABI GNU" ))); |
430 | CGBINDOPT(EABIVersion); |
431 | |
432 | static cl::opt<DebuggerKind> DebuggerTuningOpt( |
433 | "debugger-tune" , cl::desc("Tune debug info for a particular debugger" ), |
434 | cl::init(Val: DebuggerKind::Default), |
435 | cl::values( |
436 | clEnumValN(DebuggerKind::GDB, "gdb" , "gdb" ), |
437 | clEnumValN(DebuggerKind::LLDB, "lldb" , "lldb" ), |
438 | clEnumValN(DebuggerKind::DBX, "dbx" , "dbx" ), |
439 | clEnumValN(DebuggerKind::SCE, "sce" , "SCE targets (e.g. PS4)" ))); |
440 | CGBINDOPT(DebuggerTuningOpt); |
441 | |
442 | static cl::opt<bool> EnableStackSizeSection( |
443 | "stack-size-section" , |
444 | cl::desc("Emit a section containing stack size metadata" ), |
445 | cl::init(Val: false)); |
446 | CGBINDOPT(EnableStackSizeSection); |
447 | |
448 | static cl::opt<bool> EnableAddrsig( |
449 | "addrsig" , cl::desc("Emit an address-significance table" ), |
450 | cl::init(Val: false)); |
451 | CGBINDOPT(EnableAddrsig); |
452 | |
453 | static cl::opt<bool> EmitCallSiteInfo( |
454 | "emit-call-site-info" , |
455 | cl::desc( |
456 | "Emit call site debug information, if debug information is enabled." ), |
457 | cl::init(Val: false)); |
458 | CGBINDOPT(EmitCallSiteInfo); |
459 | |
460 | static cl::opt<bool> EnableDebugEntryValues( |
461 | "debug-entry-values" , |
462 | cl::desc("Enable debug info for the debug entry values." ), |
463 | cl::init(Val: false)); |
464 | CGBINDOPT(EnableDebugEntryValues); |
465 | |
466 | static cl::opt<bool> EnableMachineFunctionSplitter( |
467 | "split-machine-functions" , |
468 | cl::desc("Split out cold basic blocks from machine functions based on " |
469 | "profile information" ), |
470 | cl::init(Val: false)); |
471 | CGBINDOPT(EnableMachineFunctionSplitter); |
472 | |
473 | static cl::opt<bool> ForceDwarfFrameSection( |
474 | "force-dwarf-frame-section" , |
475 | cl::desc("Always emit a debug frame section." ), cl::init(Val: false)); |
476 | CGBINDOPT(ForceDwarfFrameSection); |
477 | |
478 | static cl::opt<bool> XRayFunctionIndex("xray-function-index" , |
479 | cl::desc("Emit xray_fn_idx section" ), |
480 | cl::init(Val: true)); |
481 | CGBINDOPT(XRayFunctionIndex); |
482 | |
483 | static cl::opt<bool> DebugStrictDwarf( |
484 | "strict-dwarf" , cl::desc("use strict dwarf" ), cl::init(Val: false)); |
485 | CGBINDOPT(DebugStrictDwarf); |
486 | |
487 | static cl::opt<unsigned> AlignLoops("align-loops" , |
488 | cl::desc("Default alignment for loops" )); |
489 | CGBINDOPT(AlignLoops); |
490 | |
491 | static cl::opt<bool> JMCInstrument( |
492 | "enable-jmc-instrument" , |
493 | cl::desc("Instrument functions with a call to __CheckForDebuggerJustMyCode" ), |
494 | cl::init(Val: false)); |
495 | CGBINDOPT(JMCInstrument); |
496 | |
497 | static cl::opt<bool> XCOFFReadOnlyPointers( |
498 | "mxcoff-roptr" , |
499 | cl::desc("When set to true, const objects with relocatable address " |
500 | "values are put into the RO data section." ), |
501 | cl::init(Val: false)); |
502 | CGBINDOPT(XCOFFReadOnlyPointers); |
503 | |
504 | static cl::opt<bool> DisableIntegratedAS( |
505 | "no-integrated-as" , cl::desc("Disable integrated assembler" ), |
506 | cl::init(Val: false)); |
507 | CGBINDOPT(DisableIntegratedAS); |
508 | |
509 | #undef CGBINDOPT |
510 | |
511 | mc::RegisterMCTargetOptionsFlags(); |
512 | } |
513 | |
514 | llvm::BasicBlockSection |
515 | codegen::getBBSectionsMode(llvm::TargetOptions &Options) { |
516 | if (getBBSections() == "all" ) |
517 | return BasicBlockSection::All; |
518 | else if (getBBSections() == "labels" ) |
519 | return BasicBlockSection::Labels; |
520 | else if (getBBSections() == "none" ) |
521 | return BasicBlockSection::None; |
522 | else { |
523 | ErrorOr<std::unique_ptr<MemoryBuffer>> MBOrErr = |
524 | MemoryBuffer::getFile(Filename: getBBSections()); |
525 | if (!MBOrErr) { |
526 | errs() << "Error loading basic block sections function list file: " |
527 | << MBOrErr.getError().message() << "\n" ; |
528 | } else { |
529 | Options.BBSectionsFuncListBuf = std::move(*MBOrErr); |
530 | } |
531 | return BasicBlockSection::List; |
532 | } |
533 | } |
534 | |
535 | // Common utility function tightly tied to the options listed here. Initializes |
536 | // a TargetOptions object with CodeGen flags and returns it. |
537 | TargetOptions |
538 | codegen::InitTargetOptionsFromCodeGenFlags(const Triple &TheTriple) { |
539 | TargetOptions Options; |
540 | Options.AllowFPOpFusion = getFuseFPOps(); |
541 | Options.UnsafeFPMath = getEnableUnsafeFPMath(); |
542 | Options.NoInfsFPMath = getEnableNoInfsFPMath(); |
543 | Options.NoNaNsFPMath = getEnableNoNaNsFPMath(); |
544 | Options.NoSignedZerosFPMath = getEnableNoSignedZerosFPMath(); |
545 | Options.ApproxFuncFPMath = getEnableApproxFuncFPMath(); |
546 | Options.NoTrappingFPMath = getEnableNoTrappingFPMath(); |
547 | |
548 | DenormalMode::DenormalModeKind DenormKind = getDenormalFPMath(); |
549 | |
550 | // FIXME: Should have separate input and output flags |
551 | Options.setFPDenormalMode(DenormalMode(DenormKind, DenormKind)); |
552 | |
553 | Options.HonorSignDependentRoundingFPMathOption = |
554 | getEnableHonorSignDependentRoundingFPMath(); |
555 | if (getFloatABIForCalls() != FloatABI::Default) |
556 | Options.FloatABIType = getFloatABIForCalls(); |
557 | Options.EnableAIXExtendedAltivecABI = getEnableAIXExtendedAltivecABI(); |
558 | Options.NoZerosInBSS = getDontPlaceZerosInBSS(); |
559 | Options.GuaranteedTailCallOpt = getEnableGuaranteedTailCallOpt(); |
560 | Options.StackSymbolOrdering = getStackSymbolOrdering(); |
561 | Options.UseInitArray = !getUseCtors(); |
562 | Options.DisableIntegratedAS = getDisableIntegratedAS(); |
563 | Options.DataSections = |
564 | getExplicitDataSections().value_or(u: TheTriple.hasDefaultDataSections()); |
565 | Options.FunctionSections = getFunctionSections(); |
566 | Options.IgnoreXCOFFVisibility = getIgnoreXCOFFVisibility(); |
567 | Options.XCOFFTracebackTable = getXCOFFTracebackTable(); |
568 | Options.BBAddrMap = getEnableBBAddrMap(); |
569 | Options.BBSections = getBBSectionsMode(Options); |
570 | Options.UniqueSectionNames = getUniqueSectionNames(); |
571 | Options.UniqueBasicBlockSectionNames = getUniqueBasicBlockSectionNames(); |
572 | Options.TLSSize = getTLSSize(); |
573 | Options.EmulatedTLS = |
574 | getExplicitEmulatedTLS().value_or(u: TheTriple.hasDefaultEmulatedTLS()); |
575 | Options.EnableTLSDESC = |
576 | getExplicitEnableTLSDESC().value_or(u: TheTriple.hasDefaultTLSDESC()); |
577 | Options.ExceptionModel = getExceptionModel(); |
578 | Options.EmitStackSizeSection = getEnableStackSizeSection(); |
579 | Options.EnableMachineFunctionSplitter = getEnableMachineFunctionSplitter(); |
580 | Options.EmitAddrsig = getEnableAddrsig(); |
581 | Options.EmitCallSiteInfo = getEmitCallSiteInfo(); |
582 | Options.EnableDebugEntryValues = getEnableDebugEntryValues(); |
583 | Options.ForceDwarfFrameSection = getForceDwarfFrameSection(); |
584 | Options.XRayFunctionIndex = getXRayFunctionIndex(); |
585 | Options.DebugStrictDwarf = getDebugStrictDwarf(); |
586 | Options.LoopAlignment = getAlignLoops(); |
587 | Options.JMCInstrument = getJMCInstrument(); |
588 | Options.XCOFFReadOnlyPointers = getXCOFFReadOnlyPointers(); |
589 | |
590 | Options.MCOptions = mc::InitMCTargetOptionsFromFlags(); |
591 | |
592 | Options.ThreadModel = getThreadModel(); |
593 | Options.EABIVersion = getEABIVersion(); |
594 | Options.DebuggerTuning = getDebuggerTuningOpt(); |
595 | Options.SwiftAsyncFramePointer = getSwiftAsyncFramePointer(); |
596 | return Options; |
597 | } |
598 | |
599 | std::string codegen::getCPUStr() { |
600 | // If user asked for the 'native' CPU, autodetect here. If autodection fails, |
601 | // this will set the CPU to an empty string which tells the target to |
602 | // pick a basic default. |
603 | if (getMCPU() == "native" ) |
604 | return std::string(sys::getHostCPUName()); |
605 | |
606 | return getMCPU(); |
607 | } |
608 | |
609 | std::string codegen::getFeaturesStr() { |
610 | SubtargetFeatures Features; |
611 | |
612 | // If user asked for the 'native' CPU, we need to autodetect features. |
613 | // This is necessary for x86 where the CPU might not support all the |
614 | // features the autodetected CPU name lists in the target. For example, |
615 | // not all Sandybridge processors support AVX. |
616 | if (getMCPU() == "native" ) { |
617 | StringMap<bool> HostFeatures; |
618 | if (sys::getHostCPUFeatures(Features&: HostFeatures)) |
619 | for (const auto &[Feature, IsEnabled] : HostFeatures) |
620 | Features.AddFeature(String: Feature, Enable: IsEnabled); |
621 | } |
622 | |
623 | for (auto const &MAttr : getMAttrs()) |
624 | Features.AddFeature(String: MAttr); |
625 | |
626 | return Features.getString(); |
627 | } |
628 | |
629 | std::vector<std::string> codegen::getFeatureList() { |
630 | SubtargetFeatures Features; |
631 | |
632 | // If user asked for the 'native' CPU, we need to autodetect features. |
633 | // This is necessary for x86 where the CPU might not support all the |
634 | // features the autodetected CPU name lists in the target. For example, |
635 | // not all Sandybridge processors support AVX. |
636 | if (getMCPU() == "native" ) { |
637 | StringMap<bool> HostFeatures; |
638 | if (sys::getHostCPUFeatures(Features&: HostFeatures)) |
639 | for (const auto &[Feature, IsEnabled] : HostFeatures) |
640 | Features.AddFeature(String: Feature, Enable: IsEnabled); |
641 | } |
642 | |
643 | for (auto const &MAttr : getMAttrs()) |
644 | Features.AddFeature(String: MAttr); |
645 | |
646 | return Features.getFeatures(); |
647 | } |
648 | |
649 | void codegen::renderBoolStringAttr(AttrBuilder &B, StringRef Name, bool Val) { |
650 | B.addAttribute(A: Name, V: Val ? "true" : "false" ); |
651 | } |
652 | |
653 | #define HANDLE_BOOL_ATTR(CL, AttrName) \ |
654 | do { \ |
655 | if (CL->getNumOccurrences() > 0 && !F.hasFnAttribute(AttrName)) \ |
656 | renderBoolStringAttr(NewAttrs, AttrName, *CL); \ |
657 | } while (0) |
658 | |
659 | /// Set function attributes of function \p F based on CPU, Features, and command |
660 | /// line flags. |
661 | void codegen::setFunctionAttributes(StringRef CPU, StringRef Features, |
662 | Function &F) { |
663 | auto &Ctx = F.getContext(); |
664 | AttributeList Attrs = F.getAttributes(); |
665 | AttrBuilder NewAttrs(Ctx); |
666 | |
667 | if (!CPU.empty() && !F.hasFnAttribute(Kind: "target-cpu" )) |
668 | NewAttrs.addAttribute(A: "target-cpu" , V: CPU); |
669 | if (!Features.empty()) { |
670 | // Append the command line features to any that are already on the function. |
671 | StringRef OldFeatures = |
672 | F.getFnAttribute(Kind: "target-features" ).getValueAsString(); |
673 | if (OldFeatures.empty()) |
674 | NewAttrs.addAttribute(A: "target-features" , V: Features); |
675 | else { |
676 | SmallString<256> Appended(OldFeatures); |
677 | Appended.push_back(Elt: ','); |
678 | Appended.append(RHS: Features); |
679 | NewAttrs.addAttribute(A: "target-features" , V: Appended); |
680 | } |
681 | } |
682 | if (FramePointerUsageView->getNumOccurrences() > 0 && |
683 | !F.hasFnAttribute(Kind: "frame-pointer" )) { |
684 | if (getFramePointerUsage() == FramePointerKind::All) |
685 | NewAttrs.addAttribute(A: "frame-pointer" , V: "all" ); |
686 | else if (getFramePointerUsage() == FramePointerKind::NonLeaf) |
687 | NewAttrs.addAttribute(A: "frame-pointer" , V: "non-leaf" ); |
688 | else if (getFramePointerUsage() == FramePointerKind::None) |
689 | NewAttrs.addAttribute(A: "frame-pointer" , V: "none" ); |
690 | } |
691 | if (DisableTailCallsView->getNumOccurrences() > 0) |
692 | NewAttrs.addAttribute(A: "disable-tail-calls" , |
693 | V: toStringRef(B: getDisableTailCalls())); |
694 | if (getStackRealign()) |
695 | NewAttrs.addAttribute(A: "stackrealign" ); |
696 | |
697 | HANDLE_BOOL_ATTR(EnableUnsafeFPMathView, "unsafe-fp-math" ); |
698 | HANDLE_BOOL_ATTR(EnableNoInfsFPMathView, "no-infs-fp-math" ); |
699 | HANDLE_BOOL_ATTR(EnableNoNaNsFPMathView, "no-nans-fp-math" ); |
700 | HANDLE_BOOL_ATTR(EnableNoSignedZerosFPMathView, "no-signed-zeros-fp-math" ); |
701 | HANDLE_BOOL_ATTR(EnableApproxFuncFPMathView, "approx-func-fp-math" ); |
702 | |
703 | if (DenormalFPMathView->getNumOccurrences() > 0 && |
704 | !F.hasFnAttribute(Kind: "denormal-fp-math" )) { |
705 | DenormalMode::DenormalModeKind DenormKind = getDenormalFPMath(); |
706 | |
707 | // FIXME: Command line flag should expose separate input/output modes. |
708 | NewAttrs.addAttribute(A: "denormal-fp-math" , |
709 | V: DenormalMode(DenormKind, DenormKind).str()); |
710 | } |
711 | |
712 | if (DenormalFP32MathView->getNumOccurrences() > 0 && |
713 | !F.hasFnAttribute(Kind: "denormal-fp-math-f32" )) { |
714 | // FIXME: Command line flag should expose separate input/output modes. |
715 | DenormalMode::DenormalModeKind DenormKind = getDenormalFP32Math(); |
716 | |
717 | NewAttrs.addAttribute( |
718 | A: "denormal-fp-math-f32" , |
719 | V: DenormalMode(DenormKind, DenormKind).str()); |
720 | } |
721 | |
722 | if (TrapFuncNameView->getNumOccurrences() > 0) |
723 | for (auto &B : F) |
724 | for (auto &I : B) |
725 | if (auto *Call = dyn_cast<CallInst>(Val: &I)) |
726 | if (const auto *F = Call->getCalledFunction()) |
727 | if (F->getIntrinsicID() == Intrinsic::debugtrap || |
728 | F->getIntrinsicID() == Intrinsic::trap) |
729 | Call->addFnAttr( |
730 | Attr: Attribute::get(Context&: Ctx, Kind: "trap-func-name" , Val: getTrapFuncName())); |
731 | |
732 | // Let NewAttrs override Attrs. |
733 | F.setAttributes(Attrs.addFnAttributes(C&: Ctx, B: NewAttrs)); |
734 | } |
735 | |
736 | /// Set function attributes of functions in Module M based on CPU, |
737 | /// Features, and command line flags. |
738 | void codegen::setFunctionAttributes(StringRef CPU, StringRef Features, |
739 | Module &M) { |
740 | for (Function &F : M) |
741 | setFunctionAttributes(CPU, Features, F); |
742 | } |
743 | |
744 | Expected<std::unique_ptr<TargetMachine>> |
745 | codegen::createTargetMachineForTriple(StringRef TargetTriple, |
746 | CodeGenOptLevel OptLevel) { |
747 | Triple TheTriple(TargetTriple); |
748 | std::string Error; |
749 | const auto *TheTarget = |
750 | TargetRegistry::lookupTarget(ArchName: codegen::getMArch(), TheTriple, Error); |
751 | if (!TheTarget) |
752 | return createStringError(EC: inconvertibleErrorCode(), S: Error); |
753 | auto *Target = TheTarget->createTargetMachine( |
754 | TT: TheTriple.getTriple(), CPU: codegen::getCPUStr(), Features: codegen::getFeaturesStr(), |
755 | Options: codegen::InitTargetOptionsFromCodeGenFlags(TheTriple), |
756 | RM: codegen::getExplicitRelocModel(), CM: codegen::getExplicitCodeModel(), |
757 | OL: OptLevel); |
758 | if (!Target) |
759 | return createStringError(EC: inconvertibleErrorCode(), |
760 | S: Twine("could not allocate target machine for " ) + |
761 | TargetTriple); |
762 | return std::unique_ptr<TargetMachine>(Target); |
763 | } |
764 | |