File: | build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/clang/lib/Driver/ToolChains/CommonArgs.cpp |
Warning: | line 1929, column 7 Forming reference to null pointer |
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1 | //===--- CommonArgs.cpp - Args handling for multiple toolchains -*- 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 | #include "CommonArgs.h" | |||
10 | #include "Arch/AArch64.h" | |||
11 | #include "Arch/ARM.h" | |||
12 | #include "Arch/M68k.h" | |||
13 | #include "Arch/Mips.h" | |||
14 | #include "Arch/PPC.h" | |||
15 | #include "Arch/SystemZ.h" | |||
16 | #include "Arch/VE.h" | |||
17 | #include "Arch/X86.h" | |||
18 | #include "HIPAMD.h" | |||
19 | #include "Hexagon.h" | |||
20 | #include "clang/Basic/CharInfo.h" | |||
21 | #include "clang/Basic/LangOptions.h" | |||
22 | #include "clang/Basic/ObjCRuntime.h" | |||
23 | #include "clang/Basic/Version.h" | |||
24 | #include "clang/Config/config.h" | |||
25 | #include "clang/Driver/Action.h" | |||
26 | #include "clang/Driver/Compilation.h" | |||
27 | #include "clang/Driver/Driver.h" | |||
28 | #include "clang/Driver/DriverDiagnostic.h" | |||
29 | #include "clang/Driver/InputInfo.h" | |||
30 | #include "clang/Driver/Job.h" | |||
31 | #include "clang/Driver/Options.h" | |||
32 | #include "clang/Driver/SanitizerArgs.h" | |||
33 | #include "clang/Driver/ToolChain.h" | |||
34 | #include "clang/Driver/Util.h" | |||
35 | #include "clang/Driver/XRayArgs.h" | |||
36 | #include "llvm/ADT/STLExtras.h" | |||
37 | #include "llvm/ADT/SmallSet.h" | |||
38 | #include "llvm/ADT/SmallString.h" | |||
39 | #include "llvm/ADT/StringExtras.h" | |||
40 | #include "llvm/ADT/StringSwitch.h" | |||
41 | #include "llvm/ADT/Twine.h" | |||
42 | #include "llvm/Config/llvm-config.h" | |||
43 | #include "llvm/Option/Arg.h" | |||
44 | #include "llvm/Option/ArgList.h" | |||
45 | #include "llvm/Option/Option.h" | |||
46 | #include "llvm/Support/CodeGen.h" | |||
47 | #include "llvm/Support/Compression.h" | |||
48 | #include "llvm/Support/Debug.h" | |||
49 | #include "llvm/Support/ErrorHandling.h" | |||
50 | #include "llvm/Support/FileSystem.h" | |||
51 | #include "llvm/Support/Host.h" | |||
52 | #include "llvm/Support/Path.h" | |||
53 | #include "llvm/Support/Process.h" | |||
54 | #include "llvm/Support/Program.h" | |||
55 | #include "llvm/Support/ScopedPrinter.h" | |||
56 | #include "llvm/Support/TargetParser.h" | |||
57 | #include "llvm/Support/Threading.h" | |||
58 | #include "llvm/Support/VirtualFileSystem.h" | |||
59 | #include "llvm/Support/YAMLParser.h" | |||
60 | ||||
61 | using namespace clang::driver; | |||
62 | using namespace clang::driver::tools; | |||
63 | using namespace clang; | |||
64 | using namespace llvm::opt; | |||
65 | ||||
66 | static void renderRpassOptions(const ArgList &Args, ArgStringList &CmdArgs) { | |||
67 | if (const Arg *A = Args.getLastArg(options::OPT_Rpass_EQ)) | |||
68 | CmdArgs.push_back(Args.MakeArgString(Twine("--plugin-opt=-pass-remarks=") + | |||
69 | A->getValue())); | |||
70 | ||||
71 | if (const Arg *A = Args.getLastArg(options::OPT_Rpass_missed_EQ)) | |||
72 | CmdArgs.push_back(Args.MakeArgString( | |||
73 | Twine("--plugin-opt=-pass-remarks-missed=") + A->getValue())); | |||
74 | ||||
75 | if (const Arg *A = Args.getLastArg(options::OPT_Rpass_analysis_EQ)) | |||
76 | CmdArgs.push_back(Args.MakeArgString( | |||
77 | Twine("--plugin-opt=-pass-remarks-analysis=") + A->getValue())); | |||
78 | } | |||
79 | ||||
80 | static void renderRemarksOptions(const ArgList &Args, ArgStringList &CmdArgs, | |||
81 | const llvm::Triple &Triple, | |||
82 | const InputInfo &Input, | |||
83 | const InputInfo &Output) { | |||
84 | StringRef Format = "yaml"; | |||
85 | if (const Arg *A = Args.getLastArg(options::OPT_fsave_optimization_record_EQ)) | |||
86 | Format = A->getValue(); | |||
87 | ||||
88 | SmallString<128> F; | |||
89 | const Arg *A = Args.getLastArg(options::OPT_foptimization_record_file_EQ); | |||
90 | if (A) | |||
91 | F = A->getValue(); | |||
92 | else if (Output.isFilename()) | |||
93 | F = Output.getFilename(); | |||
94 | ||||
95 | assert(!F.empty() && "Cannot determine remarks output name.")(static_cast <bool> (!F.empty() && "Cannot determine remarks output name." ) ? void (0) : __assert_fail ("!F.empty() && \"Cannot determine remarks output name.\"" , "clang/lib/Driver/ToolChains/CommonArgs.cpp", 95, __extension__ __PRETTY_FUNCTION__)); | |||
96 | // Append "opt.ld.<format>" to the end of the file name. | |||
97 | CmdArgs.push_back( | |||
98 | Args.MakeArgString(Twine("--plugin-opt=opt-remarks-filename=") + F + | |||
99 | Twine(".opt.ld.") + Format)); | |||
100 | ||||
101 | if (const Arg *A = | |||
102 | Args.getLastArg(options::OPT_foptimization_record_passes_EQ)) | |||
103 | CmdArgs.push_back(Args.MakeArgString( | |||
104 | Twine("--plugin-opt=opt-remarks-passes=") + A->getValue())); | |||
105 | ||||
106 | CmdArgs.push_back(Args.MakeArgString( | |||
107 | Twine("--plugin-opt=opt-remarks-format=") + Format.data())); | |||
108 | } | |||
109 | ||||
110 | static void renderRemarksHotnessOptions(const ArgList &Args, | |||
111 | ArgStringList &CmdArgs) { | |||
112 | if (Args.hasFlag(options::OPT_fdiagnostics_show_hotness, | |||
113 | options::OPT_fno_diagnostics_show_hotness, false)) | |||
114 | CmdArgs.push_back("--plugin-opt=opt-remarks-with-hotness"); | |||
115 | ||||
116 | if (const Arg *A = | |||
117 | Args.getLastArg(options::OPT_fdiagnostics_hotness_threshold_EQ)) | |||
118 | CmdArgs.push_back(Args.MakeArgString( | |||
119 | Twine("--plugin-opt=opt-remarks-hotness-threshold=") + A->getValue())); | |||
120 | } | |||
121 | ||||
122 | void tools::addPathIfExists(const Driver &D, const Twine &Path, | |||
123 | ToolChain::path_list &Paths) { | |||
124 | if (D.getVFS().exists(Path)) | |||
125 | Paths.push_back(Path.str()); | |||
126 | } | |||
127 | ||||
128 | void tools::handleTargetFeaturesGroup(const ArgList &Args, | |||
129 | std::vector<StringRef> &Features, | |||
130 | OptSpecifier Group) { | |||
131 | for (const Arg *A : Args.filtered(Group)) { | |||
132 | StringRef Name = A->getOption().getName(); | |||
133 | A->claim(); | |||
134 | ||||
135 | // Skip over "-m". | |||
136 | assert(Name.startswith("m") && "Invalid feature name.")(static_cast <bool> (Name.startswith("m") && "Invalid feature name." ) ? void (0) : __assert_fail ("Name.startswith(\"m\") && \"Invalid feature name.\"" , "clang/lib/Driver/ToolChains/CommonArgs.cpp", 136, __extension__ __PRETTY_FUNCTION__)); | |||
137 | Name = Name.substr(1); | |||
138 | ||||
139 | bool IsNegative = Name.startswith("no-"); | |||
140 | if (IsNegative) | |||
141 | Name = Name.substr(3); | |||
142 | Features.push_back(Args.MakeArgString((IsNegative ? "-" : "+") + Name)); | |||
143 | } | |||
144 | } | |||
145 | ||||
146 | std::vector<StringRef> | |||
147 | tools::unifyTargetFeatures(const std::vector<StringRef> &Features) { | |||
148 | std::vector<StringRef> UnifiedFeatures; | |||
149 | // Find the last of each feature. | |||
150 | llvm::StringMap<unsigned> LastOpt; | |||
151 | for (unsigned I = 0, N = Features.size(); I < N; ++I) { | |||
152 | StringRef Name = Features[I]; | |||
153 | assert(Name[0] == '-' || Name[0] == '+')(static_cast <bool> (Name[0] == '-' || Name[0] == '+') ? void (0) : __assert_fail ("Name[0] == '-' || Name[0] == '+'" , "clang/lib/Driver/ToolChains/CommonArgs.cpp", 153, __extension__ __PRETTY_FUNCTION__)); | |||
154 | LastOpt[Name.drop_front(1)] = I; | |||
155 | } | |||
156 | ||||
157 | for (unsigned I = 0, N = Features.size(); I < N; ++I) { | |||
158 | // If this feature was overridden, ignore it. | |||
159 | StringRef Name = Features[I]; | |||
160 | llvm::StringMap<unsigned>::iterator LastI = LastOpt.find(Name.drop_front(1)); | |||
161 | assert(LastI != LastOpt.end())(static_cast <bool> (LastI != LastOpt.end()) ? void (0) : __assert_fail ("LastI != LastOpt.end()", "clang/lib/Driver/ToolChains/CommonArgs.cpp" , 161, __extension__ __PRETTY_FUNCTION__)); | |||
162 | unsigned Last = LastI->second; | |||
163 | if (Last != I) | |||
164 | continue; | |||
165 | ||||
166 | UnifiedFeatures.push_back(Name); | |||
167 | } | |||
168 | return UnifiedFeatures; | |||
169 | } | |||
170 | ||||
171 | void tools::addDirectoryList(const ArgList &Args, ArgStringList &CmdArgs, | |||
172 | const char *ArgName, const char *EnvVar) { | |||
173 | const char *DirList = ::getenv(EnvVar); | |||
174 | bool CombinedArg = false; | |||
175 | ||||
176 | if (!DirList) | |||
177 | return; // Nothing to do. | |||
178 | ||||
179 | StringRef Name(ArgName); | |||
180 | if (Name.equals("-I") || Name.equals("-L") || Name.empty()) | |||
181 | CombinedArg = true; | |||
182 | ||||
183 | StringRef Dirs(DirList); | |||
184 | if (Dirs.empty()) // Empty string should not add '.'. | |||
185 | return; | |||
186 | ||||
187 | StringRef::size_type Delim; | |||
188 | while ((Delim = Dirs.find(llvm::sys::EnvPathSeparator)) != StringRef::npos) { | |||
189 | if (Delim == 0) { // Leading colon. | |||
190 | if (CombinedArg) { | |||
191 | CmdArgs.push_back(Args.MakeArgString(std::string(ArgName) + ".")); | |||
192 | } else { | |||
193 | CmdArgs.push_back(ArgName); | |||
194 | CmdArgs.push_back("."); | |||
195 | } | |||
196 | } else { | |||
197 | if (CombinedArg) { | |||
198 | CmdArgs.push_back( | |||
199 | Args.MakeArgString(std::string(ArgName) + Dirs.substr(0, Delim))); | |||
200 | } else { | |||
201 | CmdArgs.push_back(ArgName); | |||
202 | CmdArgs.push_back(Args.MakeArgString(Dirs.substr(0, Delim))); | |||
203 | } | |||
204 | } | |||
205 | Dirs = Dirs.substr(Delim + 1); | |||
206 | } | |||
207 | ||||
208 | if (Dirs.empty()) { // Trailing colon. | |||
209 | if (CombinedArg) { | |||
210 | CmdArgs.push_back(Args.MakeArgString(std::string(ArgName) + ".")); | |||
211 | } else { | |||
212 | CmdArgs.push_back(ArgName); | |||
213 | CmdArgs.push_back("."); | |||
214 | } | |||
215 | } else { // Add the last path. | |||
216 | if (CombinedArg) { | |||
217 | CmdArgs.push_back(Args.MakeArgString(std::string(ArgName) + Dirs)); | |||
218 | } else { | |||
219 | CmdArgs.push_back(ArgName); | |||
220 | CmdArgs.push_back(Args.MakeArgString(Dirs)); | |||
221 | } | |||
222 | } | |||
223 | } | |||
224 | ||||
225 | void tools::AddLinkerInputs(const ToolChain &TC, const InputInfoList &Inputs, | |||
226 | const ArgList &Args, ArgStringList &CmdArgs, | |||
227 | const JobAction &JA) { | |||
228 | const Driver &D = TC.getDriver(); | |||
229 | ||||
230 | // Add extra linker input arguments which are not treated as inputs | |||
231 | // (constructed via -Xarch_). | |||
232 | Args.AddAllArgValues(CmdArgs, options::OPT_Zlinker_input); | |||
233 | ||||
234 | // LIBRARY_PATH are included before user inputs and only supported on native | |||
235 | // toolchains. | |||
236 | if (!TC.isCrossCompiling()) | |||
237 | addDirectoryList(Args, CmdArgs, "-L", "LIBRARY_PATH"); | |||
238 | ||||
239 | for (const auto &II : Inputs) { | |||
240 | // If the current tool chain refers to an OpenMP offloading host, we | |||
241 | // should ignore inputs that refer to OpenMP offloading devices - | |||
242 | // they will be embedded according to a proper linker script. | |||
243 | if (auto *IA = II.getAction()) | |||
244 | if ((JA.isHostOffloading(Action::OFK_OpenMP) && | |||
245 | IA->isDeviceOffloading(Action::OFK_OpenMP))) | |||
246 | continue; | |||
247 | ||||
248 | if (!TC.HasNativeLLVMSupport() && types::isLLVMIR(II.getType())) | |||
249 | // Don't try to pass LLVM inputs unless we have native support. | |||
250 | D.Diag(diag::err_drv_no_linker_llvm_support) << TC.getTripleString(); | |||
251 | ||||
252 | // Add filenames immediately. | |||
253 | if (II.isFilename()) { | |||
254 | CmdArgs.push_back(II.getFilename()); | |||
255 | continue; | |||
256 | } | |||
257 | ||||
258 | // In some error cases, the input could be Nothing; skip those. | |||
259 | if (II.isNothing()) | |||
260 | continue; | |||
261 | ||||
262 | // Otherwise, this is a linker input argument. | |||
263 | const Arg &A = II.getInputArg(); | |||
264 | ||||
265 | // Handle reserved library options. | |||
266 | if (A.getOption().matches(options::OPT_Z_reserved_lib_stdcxx)) | |||
267 | TC.AddCXXStdlibLibArgs(Args, CmdArgs); | |||
268 | else if (A.getOption().matches(options::OPT_Z_reserved_lib_cckext)) | |||
269 | TC.AddCCKextLibArgs(Args, CmdArgs); | |||
270 | else if (A.getOption().matches(options::OPT_z)) { | |||
271 | // Pass -z prefix for gcc linker compatibility. | |||
272 | A.claim(); | |||
273 | A.render(Args, CmdArgs); | |||
274 | } else if (A.getOption().matches(options::OPT_b)) { | |||
275 | const llvm::Triple &T = TC.getTriple(); | |||
276 | if (!T.isOSAIX()) { | |||
277 | TC.getDriver().Diag(diag::err_drv_unsupported_opt_for_target) | |||
278 | << A.getSpelling() << T.str(); | |||
279 | } | |||
280 | // Pass -b prefix for AIX linker. | |||
281 | A.claim(); | |||
282 | A.render(Args, CmdArgs); | |||
283 | } else { | |||
284 | A.renderAsInput(Args, CmdArgs); | |||
285 | } | |||
286 | } | |||
287 | } | |||
288 | ||||
289 | void tools::addLinkerCompressDebugSectionsOption( | |||
290 | const ToolChain &TC, const llvm::opt::ArgList &Args, | |||
291 | llvm::opt::ArgStringList &CmdArgs) { | |||
292 | // GNU ld supports --compress-debug-sections=none|zlib|zlib-gnu|zlib-gabi | |||
293 | // whereas zlib is an alias to zlib-gabi and zlib-gnu is obsoleted. Therefore | |||
294 | // -gz=none|zlib are translated to --compress-debug-sections=none|zlib. -gz | |||
295 | // is not translated since ld --compress-debug-sections option requires an | |||
296 | // argument. | |||
297 | if (const Arg *A = Args.getLastArg(options::OPT_gz_EQ)) { | |||
298 | StringRef V = A->getValue(); | |||
299 | if (V == "none" || V == "zlib") | |||
300 | CmdArgs.push_back(Args.MakeArgString("--compress-debug-sections=" + V)); | |||
301 | else | |||
302 | TC.getDriver().Diag(diag::err_drv_unsupported_option_argument) | |||
303 | << A->getOption().getName() << V; | |||
304 | } | |||
305 | } | |||
306 | ||||
307 | void tools::AddTargetFeature(const ArgList &Args, | |||
308 | std::vector<StringRef> &Features, | |||
309 | OptSpecifier OnOpt, OptSpecifier OffOpt, | |||
310 | StringRef FeatureName) { | |||
311 | if (Arg *A = Args.getLastArg(OnOpt, OffOpt)) { | |||
312 | if (A->getOption().matches(OnOpt)) | |||
313 | Features.push_back(Args.MakeArgString("+" + FeatureName)); | |||
314 | else | |||
315 | Features.push_back(Args.MakeArgString("-" + FeatureName)); | |||
316 | } | |||
317 | } | |||
318 | ||||
319 | /// Get the (LLVM) name of the AMDGPU gpu we are targeting. | |||
320 | static std::string getAMDGPUTargetGPU(const llvm::Triple &T, | |||
321 | const ArgList &Args) { | |||
322 | if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) { | |||
323 | auto GPUName = getProcessorFromTargetID(T, A->getValue()); | |||
324 | return llvm::StringSwitch<std::string>(GPUName) | |||
325 | .Cases("rv630", "rv635", "r600") | |||
326 | .Cases("rv610", "rv620", "rs780", "rs880") | |||
327 | .Case("rv740", "rv770") | |||
328 | .Case("palm", "cedar") | |||
329 | .Cases("sumo", "sumo2", "sumo") | |||
330 | .Case("hemlock", "cypress") | |||
331 | .Case("aruba", "cayman") | |||
332 | .Default(GPUName.str()); | |||
333 | } | |||
334 | return ""; | |||
335 | } | |||
336 | ||||
337 | static std::string getLanaiTargetCPU(const ArgList &Args) { | |||
338 | if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) { | |||
339 | return A->getValue(); | |||
340 | } | |||
341 | return ""; | |||
342 | } | |||
343 | ||||
344 | /// Get the (LLVM) name of the WebAssembly cpu we are targeting. | |||
345 | static StringRef getWebAssemblyTargetCPU(const ArgList &Args) { | |||
346 | // If we have -mcpu=, use that. | |||
347 | if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) { | |||
348 | StringRef CPU = A->getValue(); | |||
349 | ||||
350 | #ifdef __wasm__ | |||
351 | // Handle "native" by examining the host. "native" isn't meaningful when | |||
352 | // cross compiling, so only support this when the host is also WebAssembly. | |||
353 | if (CPU == "native") | |||
354 | return llvm::sys::getHostCPUName(); | |||
355 | #endif | |||
356 | ||||
357 | return CPU; | |||
358 | } | |||
359 | ||||
360 | return "generic"; | |||
361 | } | |||
362 | ||||
363 | std::string tools::getCPUName(const Driver &D, const ArgList &Args, | |||
364 | const llvm::Triple &T, bool FromAs) { | |||
365 | Arg *A; | |||
366 | ||||
367 | switch (T.getArch()) { | |||
368 | default: | |||
369 | return ""; | |||
370 | ||||
371 | case llvm::Triple::aarch64: | |||
372 | case llvm::Triple::aarch64_32: | |||
373 | case llvm::Triple::aarch64_be: | |||
374 | return aarch64::getAArch64TargetCPU(Args, T, A); | |||
375 | ||||
376 | case llvm::Triple::arm: | |||
377 | case llvm::Triple::armeb: | |||
378 | case llvm::Triple::thumb: | |||
379 | case llvm::Triple::thumbeb: { | |||
380 | StringRef MArch, MCPU; | |||
381 | arm::getARMArchCPUFromArgs(Args, MArch, MCPU, FromAs); | |||
382 | return arm::getARMTargetCPU(MCPU, MArch, T); | |||
383 | } | |||
384 | ||||
385 | case llvm::Triple::avr: | |||
386 | if (const Arg *A = Args.getLastArg(options::OPT_mmcu_EQ)) | |||
387 | return A->getValue(); | |||
388 | return ""; | |||
389 | ||||
390 | case llvm::Triple::m68k: | |||
391 | return m68k::getM68kTargetCPU(Args); | |||
392 | ||||
393 | case llvm::Triple::mips: | |||
394 | case llvm::Triple::mipsel: | |||
395 | case llvm::Triple::mips64: | |||
396 | case llvm::Triple::mips64el: { | |||
397 | StringRef CPUName; | |||
398 | StringRef ABIName; | |||
399 | mips::getMipsCPUAndABI(Args, T, CPUName, ABIName); | |||
400 | return std::string(CPUName); | |||
401 | } | |||
402 | ||||
403 | case llvm::Triple::nvptx: | |||
404 | case llvm::Triple::nvptx64: | |||
405 | if (const Arg *A = Args.getLastArg(options::OPT_march_EQ)) | |||
406 | return A->getValue(); | |||
407 | return ""; | |||
408 | ||||
409 | case llvm::Triple::ppc: | |||
410 | case llvm::Triple::ppcle: | |||
411 | case llvm::Triple::ppc64: | |||
412 | case llvm::Triple::ppc64le: { | |||
413 | std::string TargetCPUName = ppc::getPPCTargetCPU(Args); | |||
414 | // LLVM may default to generating code for the native CPU, | |||
415 | // but, like gcc, we default to a more generic option for | |||
416 | // each architecture. (except on AIX) | |||
417 | if (!TargetCPUName.empty()) | |||
418 | return TargetCPUName; | |||
419 | ||||
420 | if (T.isOSAIX()) | |||
421 | TargetCPUName = "pwr7"; | |||
422 | else if (T.getArch() == llvm::Triple::ppc64le) | |||
423 | TargetCPUName = "ppc64le"; | |||
424 | else if (T.getArch() == llvm::Triple::ppc64) | |||
425 | TargetCPUName = "ppc64"; | |||
426 | else | |||
427 | TargetCPUName = "ppc"; | |||
428 | ||||
429 | return TargetCPUName; | |||
430 | } | |||
431 | case llvm::Triple::csky: | |||
432 | if (const Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) | |||
433 | return A->getValue(); | |||
434 | else if (const Arg *A = Args.getLastArg(options::OPT_march_EQ)) | |||
435 | return A->getValue(); | |||
436 | else | |||
437 | return "ck810"; | |||
438 | case llvm::Triple::riscv32: | |||
439 | case llvm::Triple::riscv64: | |||
440 | if (const Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) | |||
441 | return A->getValue(); | |||
442 | return ""; | |||
443 | ||||
444 | case llvm::Triple::bpfel: | |||
445 | case llvm::Triple::bpfeb: | |||
446 | case llvm::Triple::sparc: | |||
447 | case llvm::Triple::sparcel: | |||
448 | case llvm::Triple::sparcv9: | |||
449 | if (const Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) | |||
450 | return A->getValue(); | |||
451 | if (T.getArch() == llvm::Triple::sparc && T.isOSSolaris()) | |||
452 | return "v9"; | |||
453 | return ""; | |||
454 | ||||
455 | case llvm::Triple::x86: | |||
456 | case llvm::Triple::x86_64: | |||
457 | return x86::getX86TargetCPU(D, Args, T); | |||
458 | ||||
459 | case llvm::Triple::hexagon: | |||
460 | return "hexagon" + | |||
461 | toolchains::HexagonToolChain::GetTargetCPUVersion(Args).str(); | |||
462 | ||||
463 | case llvm::Triple::lanai: | |||
464 | return getLanaiTargetCPU(Args); | |||
465 | ||||
466 | case llvm::Triple::systemz: | |||
467 | return systemz::getSystemZTargetCPU(Args); | |||
468 | ||||
469 | case llvm::Triple::r600: | |||
470 | case llvm::Triple::amdgcn: | |||
471 | return getAMDGPUTargetGPU(T, Args); | |||
472 | ||||
473 | case llvm::Triple::wasm32: | |||
474 | case llvm::Triple::wasm64: | |||
475 | return std::string(getWebAssemblyTargetCPU(Args)); | |||
476 | } | |||
477 | } | |||
478 | ||||
479 | llvm::StringRef tools::getLTOParallelism(const ArgList &Args, const Driver &D) { | |||
480 | Arg *LtoJobsArg = Args.getLastArg(options::OPT_flto_jobs_EQ); | |||
481 | if (!LtoJobsArg) | |||
482 | return {}; | |||
483 | if (!llvm::get_threadpool_strategy(LtoJobsArg->getValue())) | |||
484 | D.Diag(diag::err_drv_invalid_int_value) | |||
485 | << LtoJobsArg->getAsString(Args) << LtoJobsArg->getValue(); | |||
486 | return LtoJobsArg->getValue(); | |||
487 | } | |||
488 | ||||
489 | // CloudABI uses -ffunction-sections and -fdata-sections by default. | |||
490 | bool tools::isUseSeparateSections(const llvm::Triple &Triple) { | |||
491 | return Triple.getOS() == llvm::Triple::CloudABI; | |||
492 | } | |||
493 | ||||
494 | void tools::addLTOOptions(const ToolChain &ToolChain, const ArgList &Args, | |||
495 | ArgStringList &CmdArgs, const InputInfo &Output, | |||
496 | const InputInfo &Input, bool IsThinLTO) { | |||
497 | const char *Linker = Args.MakeArgString(ToolChain.GetLinkerPath()); | |||
498 | const Driver &D = ToolChain.getDriver(); | |||
499 | if (llvm::sys::path::filename(Linker) != "ld.lld" && | |||
500 | llvm::sys::path::stem(Linker) != "ld.lld") { | |||
501 | // Tell the linker to load the plugin. This has to come before | |||
502 | // AddLinkerInputs as gold requires -plugin to come before any -plugin-opt | |||
503 | // that -Wl might forward. | |||
504 | CmdArgs.push_back("-plugin"); | |||
505 | ||||
506 | #if defined(_WIN32) | |||
507 | const char *Suffix = ".dll"; | |||
508 | #elif defined(__APPLE__) | |||
509 | const char *Suffix = ".dylib"; | |||
510 | #else | |||
511 | const char *Suffix = ".so"; | |||
512 | #endif | |||
513 | ||||
514 | SmallString<1024> Plugin; | |||
515 | llvm::sys::path::native( | |||
516 | Twine(D.Dir) + "/../lib" CLANG_LIBDIR_SUFFIX"" "/LLVMgold" + Suffix, | |||
517 | Plugin); | |||
518 | CmdArgs.push_back(Args.MakeArgString(Plugin)); | |||
519 | } | |||
520 | ||||
521 | // Try to pass driver level flags relevant to LTO code generation down to | |||
522 | // the plugin. | |||
523 | ||||
524 | // Handle flags for selecting CPU variants. | |||
525 | std::string CPU = getCPUName(D, Args, ToolChain.getTriple()); | |||
526 | if (!CPU.empty()) | |||
527 | CmdArgs.push_back(Args.MakeArgString(Twine("-plugin-opt=mcpu=") + CPU)); | |||
528 | ||||
529 | if (Arg *A = Args.getLastArg(options::OPT_O_Group)) { | |||
530 | // The optimization level matches | |||
531 | // CompilerInvocation.cpp:getOptimizationLevel(). | |||
532 | StringRef OOpt; | |||
533 | if (A->getOption().matches(options::OPT_O4) || | |||
534 | A->getOption().matches(options::OPT_Ofast)) | |||
535 | OOpt = "3"; | |||
536 | else if (A->getOption().matches(options::OPT_O)) { | |||
537 | OOpt = A->getValue(); | |||
538 | if (OOpt == "g") | |||
539 | OOpt = "1"; | |||
540 | else if (OOpt == "s" || OOpt == "z") | |||
541 | OOpt = "2"; | |||
542 | } else if (A->getOption().matches(options::OPT_O0)) | |||
543 | OOpt = "0"; | |||
544 | if (!OOpt.empty()) | |||
545 | CmdArgs.push_back(Args.MakeArgString(Twine("-plugin-opt=O") + OOpt)); | |||
546 | } | |||
547 | ||||
548 | if (Args.hasArg(options::OPT_gsplit_dwarf)) { | |||
549 | CmdArgs.push_back( | |||
550 | Args.MakeArgString(Twine("-plugin-opt=dwo_dir=") + | |||
551 | Output.getFilename() + "_dwo")); | |||
552 | } | |||
553 | ||||
554 | if (IsThinLTO) | |||
555 | CmdArgs.push_back("-plugin-opt=thinlto"); | |||
556 | ||||
557 | StringRef Parallelism = getLTOParallelism(Args, D); | |||
558 | if (!Parallelism.empty()) | |||
559 | CmdArgs.push_back( | |||
560 | Args.MakeArgString("-plugin-opt=jobs=" + Twine(Parallelism))); | |||
561 | ||||
562 | // If an explicit debugger tuning argument appeared, pass it along. | |||
563 | if (Arg *A = Args.getLastArg(options::OPT_gTune_Group, | |||
564 | options::OPT_ggdbN_Group)) { | |||
565 | if (A->getOption().matches(options::OPT_glldb)) | |||
566 | CmdArgs.push_back("-plugin-opt=-debugger-tune=lldb"); | |||
567 | else if (A->getOption().matches(options::OPT_gsce)) | |||
568 | CmdArgs.push_back("-plugin-opt=-debugger-tune=sce"); | |||
569 | else if (A->getOption().matches(options::OPT_gdbx)) | |||
570 | CmdArgs.push_back("-plugin-opt=-debugger-tune=dbx"); | |||
571 | else | |||
572 | CmdArgs.push_back("-plugin-opt=-debugger-tune=gdb"); | |||
573 | } | |||
574 | ||||
575 | bool UseSeparateSections = | |||
576 | isUseSeparateSections(ToolChain.getEffectiveTriple()); | |||
577 | ||||
578 | if (Args.hasFlag(options::OPT_ffunction_sections, | |||
579 | options::OPT_fno_function_sections, UseSeparateSections)) { | |||
580 | CmdArgs.push_back("-plugin-opt=-function-sections"); | |||
581 | } | |||
582 | ||||
583 | if (Args.hasFlag(options::OPT_fdata_sections, options::OPT_fno_data_sections, | |||
584 | UseSeparateSections)) { | |||
585 | CmdArgs.push_back("-plugin-opt=-data-sections"); | |||
586 | } | |||
587 | ||||
588 | // Pass an option to enable split machine functions. | |||
589 | if (auto *A = Args.getLastArg(options::OPT_fsplit_machine_functions, | |||
590 | options::OPT_fno_split_machine_functions)) { | |||
591 | if (A->getOption().matches(options::OPT_fsplit_machine_functions)) | |||
592 | CmdArgs.push_back("-plugin-opt=-split-machine-functions"); | |||
593 | } | |||
594 | ||||
595 | if (Arg *A = getLastProfileSampleUseArg(Args)) { | |||
596 | StringRef FName = A->getValue(); | |||
597 | if (!llvm::sys::fs::exists(FName)) | |||
598 | D.Diag(diag::err_drv_no_such_file) << FName; | |||
599 | else | |||
600 | CmdArgs.push_back( | |||
601 | Args.MakeArgString(Twine("-plugin-opt=sample-profile=") + FName)); | |||
602 | } | |||
603 | ||||
604 | auto *CSPGOGenerateArg = Args.getLastArg(options::OPT_fcs_profile_generate, | |||
605 | options::OPT_fcs_profile_generate_EQ, | |||
606 | options::OPT_fno_profile_generate); | |||
607 | if (CSPGOGenerateArg && | |||
608 | CSPGOGenerateArg->getOption().matches(options::OPT_fno_profile_generate)) | |||
609 | CSPGOGenerateArg = nullptr; | |||
610 | ||||
611 | auto *ProfileUseArg = getLastProfileUseArg(Args); | |||
612 | ||||
613 | if (CSPGOGenerateArg) { | |||
614 | CmdArgs.push_back(Args.MakeArgString("-plugin-opt=cs-profile-generate")); | |||
615 | if (CSPGOGenerateArg->getOption().matches( | |||
616 | options::OPT_fcs_profile_generate_EQ)) { | |||
617 | SmallString<128> Path(CSPGOGenerateArg->getValue()); | |||
618 | llvm::sys::path::append(Path, "default_%m.profraw"); | |||
619 | CmdArgs.push_back( | |||
620 | Args.MakeArgString(Twine("-plugin-opt=cs-profile-path=") + Path)); | |||
621 | } else | |||
622 | CmdArgs.push_back( | |||
623 | Args.MakeArgString("-plugin-opt=cs-profile-path=default_%m.profraw")); | |||
624 | } else if (ProfileUseArg) { | |||
625 | SmallString<128> Path( | |||
626 | ProfileUseArg->getNumValues() == 0 ? "" : ProfileUseArg->getValue()); | |||
627 | if (Path.empty() || llvm::sys::fs::is_directory(Path)) | |||
628 | llvm::sys::path::append(Path, "default.profdata"); | |||
629 | CmdArgs.push_back(Args.MakeArgString(Twine("-plugin-opt=cs-profile-path=") + | |||
630 | Path)); | |||
631 | } | |||
632 | ||||
633 | // Setup statistics file output. | |||
634 | SmallString<128> StatsFile = getStatsFileName(Args, Output, Input, D); | |||
635 | if (!StatsFile.empty()) | |||
636 | CmdArgs.push_back( | |||
637 | Args.MakeArgString(Twine("-plugin-opt=stats-file=") + StatsFile)); | |||
638 | ||||
639 | addX86AlignBranchArgs(D, Args, CmdArgs, /*IsLTO=*/true); | |||
640 | ||||
641 | // Handle remark diagnostics on screen options: '-Rpass-*'. | |||
642 | renderRpassOptions(Args, CmdArgs); | |||
643 | ||||
644 | // Handle serialized remarks options: '-fsave-optimization-record' | |||
645 | // and '-foptimization-record-*'. | |||
646 | if (willEmitRemarks(Args)) | |||
647 | renderRemarksOptions(Args, CmdArgs, ToolChain.getEffectiveTriple(), Input, | |||
648 | Output); | |||
649 | ||||
650 | // Handle remarks hotness/threshold related options. | |||
651 | renderRemarksHotnessOptions(Args, CmdArgs); | |||
652 | ||||
653 | addMachineOutlinerArgs(D, Args, CmdArgs, ToolChain.getEffectiveTriple(), | |||
654 | /*IsLTO=*/true); | |||
655 | } | |||
656 | ||||
657 | void tools::addOpenMPRuntimeSpecificRPath(const ToolChain &TC, | |||
658 | const ArgList &Args, | |||
659 | ArgStringList &CmdArgs) { | |||
660 | ||||
661 | if (Args.hasFlag(options::OPT_fopenmp_implicit_rpath, | |||
662 | options::OPT_fno_openmp_implicit_rpath, true)) { | |||
663 | // Default to clang lib / lib64 folder, i.e. the same location as device | |||
664 | // runtime | |||
665 | SmallString<256> DefaultLibPath = | |||
666 | llvm::sys::path::parent_path(TC.getDriver().Dir); | |||
667 | llvm::sys::path::append(DefaultLibPath, Twine("lib") + CLANG_LIBDIR_SUFFIX""); | |||
668 | CmdArgs.push_back("-rpath"); | |||
669 | CmdArgs.push_back(Args.MakeArgString(DefaultLibPath)); | |||
670 | } | |||
671 | } | |||
672 | ||||
673 | void tools::addOpenMPRuntimeLibraryPath(const ToolChain &TC, | |||
674 | const ArgList &Args, | |||
675 | ArgStringList &CmdArgs) { | |||
676 | // Default to clang lib / lib64 folder, i.e. the same location as device | |||
677 | // runtime. | |||
678 | SmallString<256> DefaultLibPath = | |||
679 | llvm::sys::path::parent_path(TC.getDriver().Dir); | |||
680 | llvm::sys::path::append(DefaultLibPath, Twine("lib") + CLANG_LIBDIR_SUFFIX""); | |||
681 | CmdArgs.push_back(Args.MakeArgString("-L" + DefaultLibPath)); | |||
682 | } | |||
683 | ||||
684 | void tools::addArchSpecificRPath(const ToolChain &TC, const ArgList &Args, | |||
685 | ArgStringList &CmdArgs) { | |||
686 | // Enable -frtlib-add-rpath by default for the case of VE. | |||
687 | const bool IsVE = TC.getTriple().isVE(); | |||
688 | bool DefaultValue = IsVE; | |||
689 | if (!Args.hasFlag(options::OPT_frtlib_add_rpath, | |||
690 | options::OPT_fno_rtlib_add_rpath, DefaultValue)) | |||
691 | return; | |||
692 | ||||
693 | std::string CandidateRPath = TC.getArchSpecificLibPath(); | |||
694 | if (TC.getVFS().exists(CandidateRPath)) { | |||
695 | CmdArgs.push_back("-rpath"); | |||
696 | CmdArgs.push_back(Args.MakeArgString(CandidateRPath)); | |||
697 | } | |||
698 | } | |||
699 | ||||
700 | bool tools::addOpenMPRuntime(ArgStringList &CmdArgs, const ToolChain &TC, | |||
701 | const ArgList &Args, bool ForceStaticHostRuntime, | |||
702 | bool IsOffloadingHost, bool GompNeedsRT) { | |||
703 | if (!Args.hasFlag(options::OPT_fopenmp, options::OPT_fopenmp_EQ, | |||
704 | options::OPT_fno_openmp, false)) | |||
705 | return false; | |||
706 | ||||
707 | Driver::OpenMPRuntimeKind RTKind = TC.getDriver().getOpenMPRuntime(Args); | |||
708 | ||||
709 | if (RTKind == Driver::OMPRT_Unknown) | |||
710 | // Already diagnosed. | |||
711 | return false; | |||
712 | ||||
713 | if (ForceStaticHostRuntime) | |||
714 | CmdArgs.push_back("-Bstatic"); | |||
715 | ||||
716 | switch (RTKind) { | |||
717 | case Driver::OMPRT_OMP: | |||
718 | CmdArgs.push_back("-lomp"); | |||
719 | break; | |||
720 | case Driver::OMPRT_GOMP: | |||
721 | CmdArgs.push_back("-lgomp"); | |||
722 | break; | |||
723 | case Driver::OMPRT_IOMP5: | |||
724 | CmdArgs.push_back("-liomp5"); | |||
725 | break; | |||
726 | case Driver::OMPRT_Unknown: | |||
727 | break; | |||
728 | } | |||
729 | ||||
730 | if (ForceStaticHostRuntime) | |||
731 | CmdArgs.push_back("-Bdynamic"); | |||
732 | ||||
733 | if (RTKind == Driver::OMPRT_GOMP && GompNeedsRT) | |||
734 | CmdArgs.push_back("-lrt"); | |||
735 | ||||
736 | if (IsOffloadingHost) | |||
737 | CmdArgs.push_back("-lomptarget"); | |||
738 | ||||
739 | addArchSpecificRPath(TC, Args, CmdArgs); | |||
740 | ||||
741 | if (RTKind == Driver::OMPRT_OMP) | |||
742 | addOpenMPRuntimeSpecificRPath(TC, Args, CmdArgs); | |||
743 | addOpenMPRuntimeLibraryPath(TC, Args, CmdArgs); | |||
744 | ||||
745 | return true; | |||
746 | } | |||
747 | ||||
748 | static void addSanitizerRuntime(const ToolChain &TC, const ArgList &Args, | |||
749 | ArgStringList &CmdArgs, StringRef Sanitizer, | |||
750 | bool IsShared, bool IsWhole) { | |||
751 | // Wrap any static runtimes that must be forced into executable in | |||
752 | // whole-archive. | |||
753 | if (IsWhole) CmdArgs.push_back("--whole-archive"); | |||
754 | CmdArgs.push_back(TC.getCompilerRTArgString( | |||
755 | Args, Sanitizer, IsShared ? ToolChain::FT_Shared : ToolChain::FT_Static)); | |||
756 | if (IsWhole) CmdArgs.push_back("--no-whole-archive"); | |||
757 | ||||
758 | if (IsShared) { | |||
759 | addArchSpecificRPath(TC, Args, CmdArgs); | |||
760 | } | |||
761 | } | |||
762 | ||||
763 | // Tries to use a file with the list of dynamic symbols that need to be exported | |||
764 | // from the runtime library. Returns true if the file was found. | |||
765 | static bool addSanitizerDynamicList(const ToolChain &TC, const ArgList &Args, | |||
766 | ArgStringList &CmdArgs, | |||
767 | StringRef Sanitizer) { | |||
768 | // Solaris ld defaults to --export-dynamic behaviour but doesn't support | |||
769 | // the option, so don't try to pass it. | |||
770 | if (TC.getTriple().getOS() == llvm::Triple::Solaris) | |||
771 | return true; | |||
772 | SmallString<128> SanRT(TC.getCompilerRT(Args, Sanitizer)); | |||
773 | if (llvm::sys::fs::exists(SanRT + ".syms")) { | |||
774 | CmdArgs.push_back(Args.MakeArgString("--dynamic-list=" + SanRT + ".syms")); | |||
775 | return true; | |||
776 | } | |||
777 | return false; | |||
778 | } | |||
779 | ||||
780 | const char *tools::getAsNeededOption(const ToolChain &TC, bool as_needed) { | |||
781 | assert(!TC.getTriple().isOSAIX() &&(static_cast <bool> (!TC.getTriple().isOSAIX() && "AIX linker does not support any form of --as-needed option yet." ) ? void (0) : __assert_fail ("!TC.getTriple().isOSAIX() && \"AIX linker does not support any form of --as-needed option yet.\"" , "clang/lib/Driver/ToolChains/CommonArgs.cpp", 782, __extension__ __PRETTY_FUNCTION__)) | |||
782 | "AIX linker does not support any form of --as-needed option yet.")(static_cast <bool> (!TC.getTriple().isOSAIX() && "AIX linker does not support any form of --as-needed option yet." ) ? void (0) : __assert_fail ("!TC.getTriple().isOSAIX() && \"AIX linker does not support any form of --as-needed option yet.\"" , "clang/lib/Driver/ToolChains/CommonArgs.cpp", 782, __extension__ __PRETTY_FUNCTION__)); | |||
783 | ||||
784 | // While the Solaris 11.2 ld added --as-needed/--no-as-needed as aliases | |||
785 | // for the native forms -z ignore/-z record, they are missing in Illumos, | |||
786 | // so always use the native form. | |||
787 | if (TC.getTriple().isOSSolaris()) | |||
788 | return as_needed ? "-zignore" : "-zrecord"; | |||
789 | else | |||
790 | return as_needed ? "--as-needed" : "--no-as-needed"; | |||
791 | } | |||
792 | ||||
793 | void tools::linkSanitizerRuntimeDeps(const ToolChain &TC, | |||
794 | ArgStringList &CmdArgs) { | |||
795 | // Force linking against the system libraries sanitizers depends on | |||
796 | // (see PR15823 why this is necessary). | |||
797 | CmdArgs.push_back(getAsNeededOption(TC, false)); | |||
798 | // There's no libpthread or librt on RTEMS & Android. | |||
799 | if (TC.getTriple().getOS() != llvm::Triple::RTEMS && | |||
800 | !TC.getTriple().isAndroid()) { | |||
801 | CmdArgs.push_back("-lpthread"); | |||
802 | if (!TC.getTriple().isOSOpenBSD()) | |||
803 | CmdArgs.push_back("-lrt"); | |||
804 | } | |||
805 | CmdArgs.push_back("-lm"); | |||
806 | // There's no libdl on all OSes. | |||
807 | if (!TC.getTriple().isOSFreeBSD() && !TC.getTriple().isOSNetBSD() && | |||
808 | !TC.getTriple().isOSOpenBSD() && | |||
809 | TC.getTriple().getOS() != llvm::Triple::RTEMS) | |||
810 | CmdArgs.push_back("-ldl"); | |||
811 | // Required for backtrace on some OSes | |||
812 | if (TC.getTriple().isOSFreeBSD() || | |||
813 | TC.getTriple().isOSNetBSD() || | |||
814 | TC.getTriple().isOSOpenBSD()) | |||
815 | CmdArgs.push_back("-lexecinfo"); | |||
816 | } | |||
817 | ||||
818 | static void | |||
819 | collectSanitizerRuntimes(const ToolChain &TC, const ArgList &Args, | |||
820 | SmallVectorImpl<StringRef> &SharedRuntimes, | |||
821 | SmallVectorImpl<StringRef> &StaticRuntimes, | |||
822 | SmallVectorImpl<StringRef> &NonWholeStaticRuntimes, | |||
823 | SmallVectorImpl<StringRef> &HelperStaticRuntimes, | |||
824 | SmallVectorImpl<StringRef> &RequiredSymbols) { | |||
825 | const SanitizerArgs &SanArgs = TC.getSanitizerArgs(Args); | |||
826 | // Collect shared runtimes. | |||
827 | if (SanArgs.needsSharedRt()) { | |||
828 | if (SanArgs.needsAsanRt() && SanArgs.linkRuntimes()) { | |||
829 | SharedRuntimes.push_back("asan"); | |||
830 | if (!Args.hasArg(options::OPT_shared) && !TC.getTriple().isAndroid()) | |||
831 | HelperStaticRuntimes.push_back("asan-preinit"); | |||
832 | } | |||
833 | if (SanArgs.needsMemProfRt() && SanArgs.linkRuntimes()) { | |||
834 | SharedRuntimes.push_back("memprof"); | |||
835 | if (!Args.hasArg(options::OPT_shared) && !TC.getTriple().isAndroid()) | |||
836 | HelperStaticRuntimes.push_back("memprof-preinit"); | |||
837 | } | |||
838 | if (SanArgs.needsUbsanRt() && SanArgs.linkRuntimes()) { | |||
839 | if (SanArgs.requiresMinimalRuntime()) | |||
840 | SharedRuntimes.push_back("ubsan_minimal"); | |||
841 | else | |||
842 | SharedRuntimes.push_back("ubsan_standalone"); | |||
843 | } | |||
844 | if (SanArgs.needsScudoRt() && SanArgs.linkRuntimes()) { | |||
845 | if (SanArgs.requiresMinimalRuntime()) | |||
846 | SharedRuntimes.push_back("scudo_minimal"); | |||
847 | else | |||
848 | SharedRuntimes.push_back("scudo"); | |||
849 | } | |||
850 | if (SanArgs.needsTsanRt() && SanArgs.linkRuntimes()) | |||
851 | SharedRuntimes.push_back("tsan"); | |||
852 | if (SanArgs.needsHwasanRt() && SanArgs.linkRuntimes()) { | |||
853 | if (SanArgs.needsHwasanAliasesRt()) | |||
854 | SharedRuntimes.push_back("hwasan_aliases"); | |||
855 | else | |||
856 | SharedRuntimes.push_back("hwasan"); | |||
857 | if (!Args.hasArg(options::OPT_shared)) | |||
858 | HelperStaticRuntimes.push_back("hwasan-preinit"); | |||
859 | } | |||
860 | } | |||
861 | ||||
862 | // The stats_client library is also statically linked into DSOs. | |||
863 | if (SanArgs.needsStatsRt() && SanArgs.linkRuntimes()) | |||
864 | StaticRuntimes.push_back("stats_client"); | |||
865 | ||||
866 | // Always link the static runtime regardless of DSO or executable. | |||
867 | if (SanArgs.needsAsanRt()) | |||
868 | HelperStaticRuntimes.push_back("asan_static"); | |||
869 | ||||
870 | // Collect static runtimes. | |||
871 | if (Args.hasArg(options::OPT_shared)) { | |||
872 | // Don't link static runtimes into DSOs. | |||
873 | return; | |||
874 | } | |||
875 | ||||
876 | // Each static runtime that has a DSO counterpart above is excluded below, | |||
877 | // but runtimes that exist only as static are not affected by needsSharedRt. | |||
878 | ||||
879 | if (!SanArgs.needsSharedRt() && SanArgs.needsAsanRt() && SanArgs.linkRuntimes()) { | |||
880 | StaticRuntimes.push_back("asan"); | |||
881 | if (SanArgs.linkCXXRuntimes()) | |||
882 | StaticRuntimes.push_back("asan_cxx"); | |||
883 | } | |||
884 | ||||
885 | if (!SanArgs.needsSharedRt() && SanArgs.needsMemProfRt() && | |||
886 | SanArgs.linkRuntimes()) { | |||
887 | StaticRuntimes.push_back("memprof"); | |||
888 | if (SanArgs.linkCXXRuntimes()) | |||
889 | StaticRuntimes.push_back("memprof_cxx"); | |||
890 | } | |||
891 | ||||
892 | if (!SanArgs.needsSharedRt() && SanArgs.needsHwasanRt() && SanArgs.linkRuntimes()) { | |||
893 | if (SanArgs.needsHwasanAliasesRt()) { | |||
894 | StaticRuntimes.push_back("hwasan_aliases"); | |||
895 | if (SanArgs.linkCXXRuntimes()) | |||
896 | StaticRuntimes.push_back("hwasan_aliases_cxx"); | |||
897 | } else { | |||
898 | StaticRuntimes.push_back("hwasan"); | |||
899 | if (SanArgs.linkCXXRuntimes()) | |||
900 | StaticRuntimes.push_back("hwasan_cxx"); | |||
901 | } | |||
902 | } | |||
903 | if (SanArgs.needsDfsanRt() && SanArgs.linkRuntimes()) | |||
904 | StaticRuntimes.push_back("dfsan"); | |||
905 | if (SanArgs.needsLsanRt() && SanArgs.linkRuntimes()) | |||
906 | StaticRuntimes.push_back("lsan"); | |||
907 | if (SanArgs.needsMsanRt() && SanArgs.linkRuntimes()) { | |||
908 | StaticRuntimes.push_back("msan"); | |||
909 | if (SanArgs.linkCXXRuntimes()) | |||
910 | StaticRuntimes.push_back("msan_cxx"); | |||
911 | } | |||
912 | if (!SanArgs.needsSharedRt() && SanArgs.needsTsanRt() && | |||
913 | SanArgs.linkRuntimes()) { | |||
914 | StaticRuntimes.push_back("tsan"); | |||
915 | if (SanArgs.linkCXXRuntimes()) | |||
916 | StaticRuntimes.push_back("tsan_cxx"); | |||
917 | } | |||
918 | if (!SanArgs.needsSharedRt() && SanArgs.needsUbsanRt() && SanArgs.linkRuntimes()) { | |||
919 | if (SanArgs.requiresMinimalRuntime()) { | |||
920 | StaticRuntimes.push_back("ubsan_minimal"); | |||
921 | } else { | |||
922 | StaticRuntimes.push_back("ubsan_standalone"); | |||
923 | if (SanArgs.linkCXXRuntimes()) | |||
924 | StaticRuntimes.push_back("ubsan_standalone_cxx"); | |||
925 | } | |||
926 | } | |||
927 | if (SanArgs.needsSafeStackRt() && SanArgs.linkRuntimes()) { | |||
928 | NonWholeStaticRuntimes.push_back("safestack"); | |||
929 | RequiredSymbols.push_back("__safestack_init"); | |||
930 | } | |||
931 | if (!(SanArgs.needsSharedRt() && SanArgs.needsUbsanRt() && SanArgs.linkRuntimes())) { | |||
932 | if (SanArgs.needsCfiRt() && SanArgs.linkRuntimes()) | |||
933 | StaticRuntimes.push_back("cfi"); | |||
934 | if (SanArgs.needsCfiDiagRt() && SanArgs.linkRuntimes()) { | |||
935 | StaticRuntimes.push_back("cfi_diag"); | |||
936 | if (SanArgs.linkCXXRuntimes()) | |||
937 | StaticRuntimes.push_back("ubsan_standalone_cxx"); | |||
938 | } | |||
939 | } | |||
940 | if (SanArgs.needsStatsRt() && SanArgs.linkRuntimes()) { | |||
941 | NonWholeStaticRuntimes.push_back("stats"); | |||
942 | RequiredSymbols.push_back("__sanitizer_stats_register"); | |||
943 | } | |||
944 | if (!SanArgs.needsSharedRt() && SanArgs.needsScudoRt() && SanArgs.linkRuntimes()) { | |||
945 | if (SanArgs.requiresMinimalRuntime()) { | |||
946 | StaticRuntimes.push_back("scudo_minimal"); | |||
947 | if (SanArgs.linkCXXRuntimes()) | |||
948 | StaticRuntimes.push_back("scudo_cxx_minimal"); | |||
949 | } else { | |||
950 | StaticRuntimes.push_back("scudo"); | |||
951 | if (SanArgs.linkCXXRuntimes()) | |||
952 | StaticRuntimes.push_back("scudo_cxx"); | |||
953 | } | |||
954 | } | |||
955 | } | |||
956 | ||||
957 | // Should be called before we add system libraries (C++ ABI, libstdc++/libc++, | |||
958 | // C runtime, etc). Returns true if sanitizer system deps need to be linked in. | |||
959 | bool tools::addSanitizerRuntimes(const ToolChain &TC, const ArgList &Args, | |||
960 | ArgStringList &CmdArgs) { | |||
961 | SmallVector<StringRef, 4> SharedRuntimes, StaticRuntimes, | |||
962 | NonWholeStaticRuntimes, HelperStaticRuntimes, RequiredSymbols; | |||
963 | collectSanitizerRuntimes(TC, Args, SharedRuntimes, StaticRuntimes, | |||
964 | NonWholeStaticRuntimes, HelperStaticRuntimes, | |||
965 | RequiredSymbols); | |||
966 | ||||
967 | const SanitizerArgs &SanArgs = TC.getSanitizerArgs(Args); | |||
968 | // Inject libfuzzer dependencies. | |||
969 | if (SanArgs.needsFuzzer() && SanArgs.linkRuntimes() && | |||
970 | !Args.hasArg(options::OPT_shared)) { | |||
971 | ||||
972 | addSanitizerRuntime(TC, Args, CmdArgs, "fuzzer", false, true); | |||
973 | if (SanArgs.needsFuzzerInterceptors()) | |||
974 | addSanitizerRuntime(TC, Args, CmdArgs, "fuzzer_interceptors", false, | |||
975 | true); | |||
976 | if (!Args.hasArg(clang::driver::options::OPT_nostdlibxx)) { | |||
977 | bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) && | |||
978 | !Args.hasArg(options::OPT_static); | |||
979 | if (OnlyLibstdcxxStatic) | |||
980 | CmdArgs.push_back("-Bstatic"); | |||
981 | TC.AddCXXStdlibLibArgs(Args, CmdArgs); | |||
982 | if (OnlyLibstdcxxStatic) | |||
983 | CmdArgs.push_back("-Bdynamic"); | |||
984 | } | |||
985 | } | |||
986 | ||||
987 | for (auto RT : SharedRuntimes) | |||
988 | addSanitizerRuntime(TC, Args, CmdArgs, RT, true, false); | |||
989 | for (auto RT : HelperStaticRuntimes) | |||
990 | addSanitizerRuntime(TC, Args, CmdArgs, RT, false, true); | |||
991 | bool AddExportDynamic = false; | |||
992 | for (auto RT : StaticRuntimes) { | |||
993 | addSanitizerRuntime(TC, Args, CmdArgs, RT, false, true); | |||
994 | AddExportDynamic |= !addSanitizerDynamicList(TC, Args, CmdArgs, RT); | |||
995 | } | |||
996 | for (auto RT : NonWholeStaticRuntimes) { | |||
997 | addSanitizerRuntime(TC, Args, CmdArgs, RT, false, false); | |||
998 | AddExportDynamic |= !addSanitizerDynamicList(TC, Args, CmdArgs, RT); | |||
999 | } | |||
1000 | for (auto S : RequiredSymbols) { | |||
1001 | CmdArgs.push_back("-u"); | |||
1002 | CmdArgs.push_back(Args.MakeArgString(S)); | |||
1003 | } | |||
1004 | // If there is a static runtime with no dynamic list, force all the symbols | |||
1005 | // to be dynamic to be sure we export sanitizer interface functions. | |||
1006 | if (AddExportDynamic) | |||
1007 | CmdArgs.push_back("--export-dynamic"); | |||
1008 | ||||
1009 | if (SanArgs.hasCrossDsoCfi() && !AddExportDynamic) | |||
1010 | CmdArgs.push_back("--export-dynamic-symbol=__cfi_check"); | |||
1011 | ||||
1012 | if (SanArgs.hasMemTag()) { | |||
1013 | if (!TC.getTriple().isAndroid()) { | |||
1014 | TC.getDriver().Diag(diag::err_drv_unsupported_opt_for_target) | |||
1015 | << "-fsanitize=memtag*" << TC.getTriple().str(); | |||
1016 | } | |||
1017 | CmdArgs.push_back( | |||
1018 | Args.MakeArgString("--android-memtag-mode=" + SanArgs.getMemtagMode())); | |||
1019 | if (SanArgs.hasMemtagHeap()) | |||
1020 | CmdArgs.push_back("--android-memtag-heap"); | |||
1021 | if (SanArgs.hasMemtagStack()) | |||
1022 | CmdArgs.push_back("--android-memtag-stack"); | |||
1023 | } | |||
1024 | ||||
1025 | return !StaticRuntimes.empty() || !NonWholeStaticRuntimes.empty(); | |||
1026 | } | |||
1027 | ||||
1028 | bool tools::addXRayRuntime(const ToolChain&TC, const ArgList &Args, ArgStringList &CmdArgs) { | |||
1029 | if (Args.hasArg(options::OPT_shared)) | |||
1030 | return false; | |||
1031 | ||||
1032 | if (TC.getXRayArgs().needsXRayRt()) { | |||
1033 | CmdArgs.push_back("-whole-archive"); | |||
1034 | CmdArgs.push_back(TC.getCompilerRTArgString(Args, "xray")); | |||
1035 | for (const auto &Mode : TC.getXRayArgs().modeList()) | |||
1036 | CmdArgs.push_back(TC.getCompilerRTArgString(Args, Mode)); | |||
1037 | CmdArgs.push_back("-no-whole-archive"); | |||
1038 | return true; | |||
1039 | } | |||
1040 | ||||
1041 | return false; | |||
1042 | } | |||
1043 | ||||
1044 | void tools::linkXRayRuntimeDeps(const ToolChain &TC, ArgStringList &CmdArgs) { | |||
1045 | CmdArgs.push_back(getAsNeededOption(TC, false)); | |||
1046 | CmdArgs.push_back("-lpthread"); | |||
1047 | if (!TC.getTriple().isOSOpenBSD()) | |||
1048 | CmdArgs.push_back("-lrt"); | |||
1049 | CmdArgs.push_back("-lm"); | |||
1050 | ||||
1051 | if (!TC.getTriple().isOSFreeBSD() && | |||
1052 | !TC.getTriple().isOSNetBSD() && | |||
1053 | !TC.getTriple().isOSOpenBSD()) | |||
1054 | CmdArgs.push_back("-ldl"); | |||
1055 | } | |||
1056 | ||||
1057 | bool tools::areOptimizationsEnabled(const ArgList &Args) { | |||
1058 | // Find the last -O arg and see if it is non-zero. | |||
1059 | if (Arg *A = Args.getLastArg(options::OPT_O_Group)) | |||
1060 | return !A->getOption().matches(options::OPT_O0); | |||
1061 | // Defaults to -O0. | |||
1062 | return false; | |||
1063 | } | |||
1064 | ||||
1065 | const char *tools::SplitDebugName(const JobAction &JA, const ArgList &Args, | |||
1066 | const InputInfo &Input, | |||
1067 | const InputInfo &Output) { | |||
1068 | auto AddPostfix = [JA](auto &F) { | |||
1069 | if (JA.getOffloadingDeviceKind() == Action::OFK_HIP) | |||
1070 | F += (Twine("_") + JA.getOffloadingArch()).str(); | |||
1071 | F += ".dwo"; | |||
1072 | }; | |||
1073 | if (Arg *A = Args.getLastArg(options::OPT_gsplit_dwarf_EQ)) | |||
1074 | if (StringRef(A->getValue()) == "single") | |||
1075 | return Args.MakeArgString(Output.getFilename()); | |||
1076 | ||||
1077 | Arg *FinalOutput = Args.getLastArg(options::OPT_o); | |||
1078 | if (FinalOutput && Args.hasArg(options::OPT_c)) { | |||
1079 | SmallString<128> T(FinalOutput->getValue()); | |||
1080 | llvm::sys::path::remove_filename(T); | |||
1081 | llvm::sys::path::append(T, llvm::sys::path::stem(FinalOutput->getValue())); | |||
1082 | AddPostfix(T); | |||
1083 | return Args.MakeArgString(T); | |||
1084 | } else { | |||
1085 | // Use the compilation dir. | |||
1086 | Arg *A = Args.getLastArg(options::OPT_ffile_compilation_dir_EQ, | |||
1087 | options::OPT_fdebug_compilation_dir_EQ); | |||
1088 | SmallString<128> T(A ? A->getValue() : ""); | |||
1089 | SmallString<128> F(llvm::sys::path::stem(Input.getBaseInput())); | |||
1090 | AddPostfix(F); | |||
1091 | T += F; | |||
1092 | return Args.MakeArgString(T); | |||
1093 | } | |||
1094 | } | |||
1095 | ||||
1096 | void tools::SplitDebugInfo(const ToolChain &TC, Compilation &C, const Tool &T, | |||
1097 | const JobAction &JA, const ArgList &Args, | |||
1098 | const InputInfo &Output, const char *OutFile) { | |||
1099 | ArgStringList ExtractArgs; | |||
1100 | ExtractArgs.push_back("--extract-dwo"); | |||
1101 | ||||
1102 | ArgStringList StripArgs; | |||
1103 | StripArgs.push_back("--strip-dwo"); | |||
1104 | ||||
1105 | // Grabbing the output of the earlier compile step. | |||
1106 | StripArgs.push_back(Output.getFilename()); | |||
1107 | ExtractArgs.push_back(Output.getFilename()); | |||
1108 | ExtractArgs.push_back(OutFile); | |||
1109 | ||||
1110 | const char *Exec = | |||
1111 | Args.MakeArgString(TC.GetProgramPath(CLANG_DEFAULT_OBJCOPY"objcopy")); | |||
1112 | InputInfo II(types::TY_Object, Output.getFilename(), Output.getFilename()); | |||
1113 | ||||
1114 | // First extract the dwo sections. | |||
1115 | C.addCommand(std::make_unique<Command>(JA, T, | |||
1116 | ResponseFileSupport::AtFileCurCP(), | |||
1117 | Exec, ExtractArgs, II, Output)); | |||
1118 | ||||
1119 | // Then remove them from the original .o file. | |||
1120 | C.addCommand(std::make_unique<Command>( | |||
1121 | JA, T, ResponseFileSupport::AtFileCurCP(), Exec, StripArgs, II, Output)); | |||
1122 | } | |||
1123 | ||||
1124 | // Claim options we don't want to warn if they are unused. We do this for | |||
1125 | // options that build systems might add but are unused when assembling or only | |||
1126 | // running the preprocessor for example. | |||
1127 | void tools::claimNoWarnArgs(const ArgList &Args) { | |||
1128 | // Don't warn about unused -f(no-)?lto. This can happen when we're | |||
1129 | // preprocessing, precompiling or assembling. | |||
1130 | Args.ClaimAllArgs(options::OPT_flto_EQ); | |||
1131 | Args.ClaimAllArgs(options::OPT_flto); | |||
1132 | Args.ClaimAllArgs(options::OPT_fno_lto); | |||
1133 | } | |||
1134 | ||||
1135 | Arg *tools::getLastProfileUseArg(const ArgList &Args) { | |||
1136 | auto *ProfileUseArg = Args.getLastArg( | |||
1137 | options::OPT_fprofile_instr_use, options::OPT_fprofile_instr_use_EQ, | |||
1138 | options::OPT_fprofile_use, options::OPT_fprofile_use_EQ, | |||
1139 | options::OPT_fno_profile_instr_use); | |||
1140 | ||||
1141 | if (ProfileUseArg && | |||
1142 | ProfileUseArg->getOption().matches(options::OPT_fno_profile_instr_use)) | |||
1143 | ProfileUseArg = nullptr; | |||
1144 | ||||
1145 | return ProfileUseArg; | |||
1146 | } | |||
1147 | ||||
1148 | Arg *tools::getLastProfileSampleUseArg(const ArgList &Args) { | |||
1149 | auto *ProfileSampleUseArg = Args.getLastArg( | |||
1150 | options::OPT_fprofile_sample_use, options::OPT_fprofile_sample_use_EQ, | |||
1151 | options::OPT_fauto_profile, options::OPT_fauto_profile_EQ, | |||
1152 | options::OPT_fno_profile_sample_use, options::OPT_fno_auto_profile); | |||
1153 | ||||
1154 | if (ProfileSampleUseArg && | |||
1155 | (ProfileSampleUseArg->getOption().matches( | |||
1156 | options::OPT_fno_profile_sample_use) || | |||
1157 | ProfileSampleUseArg->getOption().matches(options::OPT_fno_auto_profile))) | |||
1158 | return nullptr; | |||
1159 | ||||
1160 | return Args.getLastArg(options::OPT_fprofile_sample_use_EQ, | |||
1161 | options::OPT_fauto_profile_EQ); | |||
1162 | } | |||
1163 | ||||
1164 | /// Parses the various -fpic/-fPIC/-fpie/-fPIE arguments. Then, | |||
1165 | /// smooshes them together with platform defaults, to decide whether | |||
1166 | /// this compile should be using PIC mode or not. Returns a tuple of | |||
1167 | /// (RelocationModel, PICLevel, IsPIE). | |||
1168 | std::tuple<llvm::Reloc::Model, unsigned, bool> | |||
1169 | tools::ParsePICArgs(const ToolChain &ToolChain, const ArgList &Args) { | |||
1170 | const llvm::Triple &EffectiveTriple = ToolChain.getEffectiveTriple(); | |||
1171 | const llvm::Triple &Triple = ToolChain.getTriple(); | |||
1172 | ||||
1173 | bool PIE = ToolChain.isPIEDefault(Args); | |||
1174 | bool PIC = PIE || ToolChain.isPICDefault(); | |||
1175 | // The Darwin/MachO default to use PIC does not apply when using -static. | |||
1176 | if (Triple.isOSBinFormatMachO() && Args.hasArg(options::OPT_static)) | |||
1177 | PIE = PIC = false; | |||
1178 | bool IsPICLevelTwo = PIC; | |||
1179 | ||||
1180 | bool KernelOrKext = | |||
1181 | Args.hasArg(options::OPT_mkernel, options::OPT_fapple_kext); | |||
1182 | ||||
1183 | // Android-specific defaults for PIC/PIE | |||
1184 | if (Triple.isAndroid()) { | |||
1185 | switch (Triple.getArch()) { | |||
1186 | case llvm::Triple::arm: | |||
1187 | case llvm::Triple::armeb: | |||
1188 | case llvm::Triple::thumb: | |||
1189 | case llvm::Triple::thumbeb: | |||
1190 | case llvm::Triple::aarch64: | |||
1191 | case llvm::Triple::mips: | |||
1192 | case llvm::Triple::mipsel: | |||
1193 | case llvm::Triple::mips64: | |||
1194 | case llvm::Triple::mips64el: | |||
1195 | PIC = true; // "-fpic" | |||
1196 | break; | |||
1197 | ||||
1198 | case llvm::Triple::x86: | |||
1199 | case llvm::Triple::x86_64: | |||
1200 | PIC = true; // "-fPIC" | |||
1201 | IsPICLevelTwo = true; | |||
1202 | break; | |||
1203 | ||||
1204 | default: | |||
1205 | break; | |||
1206 | } | |||
1207 | } | |||
1208 | ||||
1209 | // OpenBSD-specific defaults for PIE | |||
1210 | if (Triple.isOSOpenBSD()) { | |||
1211 | switch (ToolChain.getArch()) { | |||
1212 | case llvm::Triple::arm: | |||
1213 | case llvm::Triple::aarch64: | |||
1214 | case llvm::Triple::mips64: | |||
1215 | case llvm::Triple::mips64el: | |||
1216 | case llvm::Triple::x86: | |||
1217 | case llvm::Triple::x86_64: | |||
1218 | IsPICLevelTwo = false; // "-fpie" | |||
1219 | break; | |||
1220 | ||||
1221 | case llvm::Triple::ppc: | |||
1222 | case llvm::Triple::sparcv9: | |||
1223 | IsPICLevelTwo = true; // "-fPIE" | |||
1224 | break; | |||
1225 | ||||
1226 | default: | |||
1227 | break; | |||
1228 | } | |||
1229 | } | |||
1230 | ||||
1231 | // AMDGPU-specific defaults for PIC. | |||
1232 | if (Triple.getArch() == llvm::Triple::amdgcn) | |||
1233 | PIC = true; | |||
1234 | ||||
1235 | // The last argument relating to either PIC or PIE wins, and no | |||
1236 | // other argument is used. If the last argument is any flavor of the | |||
1237 | // '-fno-...' arguments, both PIC and PIE are disabled. Any PIE | |||
1238 | // option implicitly enables PIC at the same level. | |||
1239 | Arg *LastPICArg = Args.getLastArg(options::OPT_fPIC, options::OPT_fno_PIC, | |||
1240 | options::OPT_fpic, options::OPT_fno_pic, | |||
1241 | options::OPT_fPIE, options::OPT_fno_PIE, | |||
1242 | options::OPT_fpie, options::OPT_fno_pie); | |||
1243 | if (Triple.isOSWindows() && !Triple.isOSCygMing() && LastPICArg && | |||
1244 | LastPICArg == Args.getLastArg(options::OPT_fPIC, options::OPT_fpic, | |||
1245 | options::OPT_fPIE, options::OPT_fpie)) { | |||
1246 | ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target) | |||
1247 | << LastPICArg->getSpelling() << Triple.str(); | |||
1248 | if (Triple.getArch() == llvm::Triple::x86_64) | |||
1249 | return std::make_tuple(llvm::Reloc::PIC_, 2U, false); | |||
1250 | return std::make_tuple(llvm::Reloc::Static, 0U, false); | |||
1251 | } | |||
1252 | ||||
1253 | // Check whether the tool chain trumps the PIC-ness decision. If the PIC-ness | |||
1254 | // is forced, then neither PIC nor PIE flags will have no effect. | |||
1255 | if (!ToolChain.isPICDefaultForced()) { | |||
1256 | if (LastPICArg) { | |||
1257 | Option O = LastPICArg->getOption(); | |||
1258 | if (O.matches(options::OPT_fPIC) || O.matches(options::OPT_fpic) || | |||
1259 | O.matches(options::OPT_fPIE) || O.matches(options::OPT_fpie)) { | |||
1260 | PIE = O.matches(options::OPT_fPIE) || O.matches(options::OPT_fpie); | |||
1261 | PIC = | |||
1262 | PIE || O.matches(options::OPT_fPIC) || O.matches(options::OPT_fpic); | |||
1263 | IsPICLevelTwo = | |||
1264 | O.matches(options::OPT_fPIE) || O.matches(options::OPT_fPIC); | |||
1265 | } else { | |||
1266 | PIE = PIC = false; | |||
1267 | if (EffectiveTriple.isPS4()) { | |||
1268 | Arg *ModelArg = Args.getLastArg(options::OPT_mcmodel_EQ); | |||
1269 | StringRef Model = ModelArg ? ModelArg->getValue() : ""; | |||
1270 | if (Model != "kernel") { | |||
1271 | PIC = true; | |||
1272 | ToolChain.getDriver().Diag(diag::warn_drv_ps4_force_pic) | |||
1273 | << LastPICArg->getSpelling(); | |||
1274 | } | |||
1275 | } | |||
1276 | } | |||
1277 | } | |||
1278 | } | |||
1279 | ||||
1280 | // Introduce a Darwin and PS4-specific hack. If the default is PIC, but the | |||
1281 | // PIC level would've been set to level 1, force it back to level 2 PIC | |||
1282 | // instead. | |||
1283 | if (PIC && (Triple.isOSDarwin() || EffectiveTriple.isPS4())) | |||
1284 | IsPICLevelTwo |= ToolChain.isPICDefault(); | |||
1285 | ||||
1286 | // This kernel flags are a trump-card: they will disable PIC/PIE | |||
1287 | // generation, independent of the argument order. | |||
1288 | if (KernelOrKext && | |||
1289 | ((!EffectiveTriple.isiOS() || EffectiveTriple.isOSVersionLT(6)) && | |||
1290 | !EffectiveTriple.isWatchOS())) | |||
1291 | PIC = PIE = false; | |||
1292 | ||||
1293 | if (Arg *A = Args.getLastArg(options::OPT_mdynamic_no_pic)) { | |||
1294 | // This is a very special mode. It trumps the other modes, almost no one | |||
1295 | // uses it, and it isn't even valid on any OS but Darwin. | |||
1296 | if (!Triple.isOSDarwin()) | |||
1297 | ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target) | |||
1298 | << A->getSpelling() << Triple.str(); | |||
1299 | ||||
1300 | // FIXME: Warn when this flag trumps some other PIC or PIE flag. | |||
1301 | ||||
1302 | // Only a forced PIC mode can cause the actual compile to have PIC defines | |||
1303 | // etc., no flags are sufficient. This behavior was selected to closely | |||
1304 | // match that of llvm-gcc and Apple GCC before that. | |||
1305 | PIC = ToolChain.isPICDefault() && ToolChain.isPICDefaultForced(); | |||
1306 | ||||
1307 | return std::make_tuple(llvm::Reloc::DynamicNoPIC, PIC ? 2U : 0U, false); | |||
1308 | } | |||
1309 | ||||
1310 | bool EmbeddedPISupported; | |||
1311 | switch (Triple.getArch()) { | |||
1312 | case llvm::Triple::arm: | |||
1313 | case llvm::Triple::armeb: | |||
1314 | case llvm::Triple::thumb: | |||
1315 | case llvm::Triple::thumbeb: | |||
1316 | EmbeddedPISupported = true; | |||
1317 | break; | |||
1318 | default: | |||
1319 | EmbeddedPISupported = false; | |||
1320 | break; | |||
1321 | } | |||
1322 | ||||
1323 | bool ROPI = false, RWPI = false; | |||
1324 | Arg* LastROPIArg = Args.getLastArg(options::OPT_fropi, options::OPT_fno_ropi); | |||
1325 | if (LastROPIArg && LastROPIArg->getOption().matches(options::OPT_fropi)) { | |||
1326 | if (!EmbeddedPISupported) | |||
1327 | ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target) | |||
1328 | << LastROPIArg->getSpelling() << Triple.str(); | |||
1329 | ROPI = true; | |||
1330 | } | |||
1331 | Arg *LastRWPIArg = Args.getLastArg(options::OPT_frwpi, options::OPT_fno_rwpi); | |||
1332 | if (LastRWPIArg && LastRWPIArg->getOption().matches(options::OPT_frwpi)) { | |||
1333 | if (!EmbeddedPISupported) | |||
1334 | ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target) | |||
1335 | << LastRWPIArg->getSpelling() << Triple.str(); | |||
1336 | RWPI = true; | |||
1337 | } | |||
1338 | ||||
1339 | // ROPI and RWPI are not compatible with PIC or PIE. | |||
1340 | if ((ROPI || RWPI) && (PIC || PIE)) | |||
1341 | ToolChain.getDriver().Diag(diag::err_drv_ropi_rwpi_incompatible_with_pic); | |||
1342 | ||||
1343 | if (Triple.isMIPS()) { | |||
1344 | StringRef CPUName; | |||
1345 | StringRef ABIName; | |||
1346 | mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName); | |||
1347 | // When targeting the N64 ABI, PIC is the default, except in the case | |||
1348 | // when the -mno-abicalls option is used. In that case we exit | |||
1349 | // at next check regardless of PIC being set below. | |||
1350 | if (ABIName == "n64") | |||
1351 | PIC = true; | |||
1352 | // When targettng MIPS with -mno-abicalls, it's always static. | |||
1353 | if(Args.hasArg(options::OPT_mno_abicalls)) | |||
1354 | return std::make_tuple(llvm::Reloc::Static, 0U, false); | |||
1355 | // Unlike other architectures, MIPS, even with -fPIC/-mxgot/multigot, | |||
1356 | // does not use PIC level 2 for historical reasons. | |||
1357 | IsPICLevelTwo = false; | |||
1358 | } | |||
1359 | ||||
1360 | if (PIC) | |||
1361 | return std::make_tuple(llvm::Reloc::PIC_, IsPICLevelTwo ? 2U : 1U, PIE); | |||
1362 | ||||
1363 | llvm::Reloc::Model RelocM = llvm::Reloc::Static; | |||
1364 | if (ROPI && RWPI) | |||
1365 | RelocM = llvm::Reloc::ROPI_RWPI; | |||
1366 | else if (ROPI) | |||
1367 | RelocM = llvm::Reloc::ROPI; | |||
1368 | else if (RWPI) | |||
1369 | RelocM = llvm::Reloc::RWPI; | |||
1370 | ||||
1371 | return std::make_tuple(RelocM, 0U, false); | |||
1372 | } | |||
1373 | ||||
1374 | // `-falign-functions` indicates that the functions should be aligned to a | |||
1375 | // 16-byte boundary. | |||
1376 | // | |||
1377 | // `-falign-functions=1` is the same as `-fno-align-functions`. | |||
1378 | // | |||
1379 | // The scalar `n` in `-falign-functions=n` must be an integral value between | |||
1380 | // [0, 65536]. If the value is not a power-of-two, it will be rounded up to | |||
1381 | // the nearest power-of-two. | |||
1382 | // | |||
1383 | // If we return `0`, the frontend will default to the backend's preferred | |||
1384 | // alignment. | |||
1385 | // | |||
1386 | // NOTE: icc only allows values between [0, 4096]. icc uses `-falign-functions` | |||
1387 | // to mean `-falign-functions=16`. GCC defaults to the backend's preferred | |||
1388 | // alignment. For unaligned functions, we default to the backend's preferred | |||
1389 | // alignment. | |||
1390 | unsigned tools::ParseFunctionAlignment(const ToolChain &TC, | |||
1391 | const ArgList &Args) { | |||
1392 | const Arg *A = Args.getLastArg(options::OPT_falign_functions, | |||
1393 | options::OPT_falign_functions_EQ, | |||
1394 | options::OPT_fno_align_functions); | |||
1395 | if (!A || A->getOption().matches(options::OPT_fno_align_functions)) | |||
1396 | return 0; | |||
1397 | ||||
1398 | if (A->getOption().matches(options::OPT_falign_functions)) | |||
1399 | return 0; | |||
1400 | ||||
1401 | unsigned Value = 0; | |||
1402 | if (StringRef(A->getValue()).getAsInteger(10, Value) || Value > 65536) | |||
1403 | TC.getDriver().Diag(diag::err_drv_invalid_int_value) | |||
1404 | << A->getAsString(Args) << A->getValue(); | |||
1405 | return Value ? llvm::Log2_32_Ceil(std::min(Value, 65536u)) : Value; | |||
1406 | } | |||
1407 | ||||
1408 | unsigned tools::ParseDebugDefaultVersion(const ToolChain &TC, | |||
1409 | const ArgList &Args) { | |||
1410 | const Arg *A = Args.getLastArg(options::OPT_fdebug_default_version); | |||
1411 | ||||
1412 | if (!A) | |||
1413 | return 0; | |||
1414 | ||||
1415 | unsigned Value = 0; | |||
1416 | if (StringRef(A->getValue()).getAsInteger(10, Value) || Value > 5 || | |||
1417 | Value < 2) | |||
1418 | TC.getDriver().Diag(diag::err_drv_invalid_int_value) | |||
1419 | << A->getAsString(Args) << A->getValue(); | |||
1420 | return Value; | |||
1421 | } | |||
1422 | ||||
1423 | void tools::AddAssemblerKPIC(const ToolChain &ToolChain, const ArgList &Args, | |||
1424 | ArgStringList &CmdArgs) { | |||
1425 | llvm::Reloc::Model RelocationModel; | |||
1426 | unsigned PICLevel; | |||
1427 | bool IsPIE; | |||
1428 | std::tie(RelocationModel, PICLevel, IsPIE) = ParsePICArgs(ToolChain, Args); | |||
1429 | ||||
1430 | if (RelocationModel != llvm::Reloc::Static) | |||
1431 | CmdArgs.push_back("-KPIC"); | |||
1432 | } | |||
1433 | ||||
1434 | /// Determine whether Objective-C automated reference counting is | |||
1435 | /// enabled. | |||
1436 | bool tools::isObjCAutoRefCount(const ArgList &Args) { | |||
1437 | return Args.hasFlag(options::OPT_fobjc_arc, options::OPT_fno_objc_arc, false); | |||
1438 | } | |||
1439 | ||||
1440 | enum class LibGccType { UnspecifiedLibGcc, StaticLibGcc, SharedLibGcc }; | |||
1441 | ||||
1442 | static LibGccType getLibGccType(const ToolChain &TC, const Driver &D, | |||
1443 | const ArgList &Args) { | |||
1444 | if (Args.hasArg(options::OPT_static_libgcc) || | |||
1445 | Args.hasArg(options::OPT_static) || Args.hasArg(options::OPT_static_pie)) | |||
1446 | return LibGccType::StaticLibGcc; | |||
1447 | if (Args.hasArg(options::OPT_shared_libgcc)) | |||
1448 | return LibGccType::SharedLibGcc; | |||
1449 | // The Android NDK only provides libunwind.a, not libunwind.so. | |||
1450 | if (TC.getTriple().isAndroid()) | |||
1451 | return LibGccType::StaticLibGcc; | |||
1452 | // For MinGW, don't imply a shared libgcc here, we only want to return | |||
1453 | // SharedLibGcc if that was explicitly requested. | |||
1454 | if (D.CCCIsCXX() && !TC.getTriple().isOSCygMing()) | |||
1455 | return LibGccType::SharedLibGcc; | |||
1456 | return LibGccType::UnspecifiedLibGcc; | |||
1457 | } | |||
1458 | ||||
1459 | // Gcc adds libgcc arguments in various ways: | |||
1460 | // | |||
1461 | // gcc <none>: -lgcc --as-needed -lgcc_s --no-as-needed | |||
1462 | // g++ <none>: -lgcc_s -lgcc | |||
1463 | // gcc shared: -lgcc_s -lgcc | |||
1464 | // g++ shared: -lgcc_s -lgcc | |||
1465 | // gcc static: -lgcc -lgcc_eh | |||
1466 | // g++ static: -lgcc -lgcc_eh | |||
1467 | // gcc static-pie: -lgcc -lgcc_eh | |||
1468 | // g++ static-pie: -lgcc -lgcc_eh | |||
1469 | // | |||
1470 | // Also, certain targets need additional adjustments. | |||
1471 | ||||
1472 | static void AddUnwindLibrary(const ToolChain &TC, const Driver &D, | |||
1473 | ArgStringList &CmdArgs, const ArgList &Args) { | |||
1474 | ToolChain::UnwindLibType UNW = TC.GetUnwindLibType(Args); | |||
1475 | // Targets that don't use unwind libraries. | |||
1476 | if ((TC.getTriple().isAndroid() && UNW == ToolChain::UNW_Libgcc) || | |||
1477 | TC.getTriple().isOSIAMCU() || TC.getTriple().isOSBinFormatWasm() || | |||
1478 | UNW == ToolChain::UNW_None) | |||
1479 | return; | |||
1480 | ||||
1481 | LibGccType LGT = getLibGccType(TC, D, Args); | |||
1482 | bool AsNeeded = LGT == LibGccType::UnspecifiedLibGcc && | |||
1483 | !TC.getTriple().isAndroid() && | |||
1484 | !TC.getTriple().isOSCygMing() && !TC.getTriple().isOSAIX(); | |||
1485 | if (AsNeeded) | |||
1486 | CmdArgs.push_back(getAsNeededOption(TC, true)); | |||
1487 | ||||
1488 | switch (UNW) { | |||
1489 | case ToolChain::UNW_None: | |||
1490 | return; | |||
1491 | case ToolChain::UNW_Libgcc: { | |||
1492 | if (LGT == LibGccType::StaticLibGcc) | |||
1493 | CmdArgs.push_back("-lgcc_eh"); | |||
1494 | else | |||
1495 | CmdArgs.push_back("-lgcc_s"); | |||
1496 | break; | |||
1497 | } | |||
1498 | case ToolChain::UNW_CompilerRT: | |||
1499 | if (TC.getTriple().isOSAIX()) { | |||
1500 | // AIX only has libunwind as a shared library. So do not pass | |||
1501 | // anything in if -static is specified. | |||
1502 | if (LGT != LibGccType::StaticLibGcc) | |||
1503 | CmdArgs.push_back("-lunwind"); | |||
1504 | } else if (LGT == LibGccType::StaticLibGcc) { | |||
1505 | CmdArgs.push_back("-l:libunwind.a"); | |||
1506 | } else if (TC.getTriple().isOSCygMing()) { | |||
1507 | if (LGT == LibGccType::SharedLibGcc) | |||
1508 | CmdArgs.push_back("-l:libunwind.dll.a"); | |||
1509 | else | |||
1510 | // Let the linker choose between libunwind.dll.a and libunwind.a | |||
1511 | // depending on what's available, and depending on the -static flag | |||
1512 | CmdArgs.push_back("-lunwind"); | |||
1513 | } else { | |||
1514 | CmdArgs.push_back("-l:libunwind.so"); | |||
1515 | } | |||
1516 | break; | |||
1517 | } | |||
1518 | ||||
1519 | if (AsNeeded) | |||
1520 | CmdArgs.push_back(getAsNeededOption(TC, false)); | |||
1521 | } | |||
1522 | ||||
1523 | static void AddLibgcc(const ToolChain &TC, const Driver &D, | |||
1524 | ArgStringList &CmdArgs, const ArgList &Args) { | |||
1525 | LibGccType LGT = getLibGccType(TC, D, Args); | |||
1526 | if (LGT != LibGccType::SharedLibGcc) | |||
1527 | CmdArgs.push_back("-lgcc"); | |||
1528 | AddUnwindLibrary(TC, D, CmdArgs, Args); | |||
1529 | if (LGT == LibGccType::SharedLibGcc) | |||
1530 | CmdArgs.push_back("-lgcc"); | |||
1531 | } | |||
1532 | ||||
1533 | void tools::AddRunTimeLibs(const ToolChain &TC, const Driver &D, | |||
1534 | ArgStringList &CmdArgs, const ArgList &Args) { | |||
1535 | // Make use of compiler-rt if --rtlib option is used | |||
1536 | ToolChain::RuntimeLibType RLT = TC.GetRuntimeLibType(Args); | |||
1537 | ||||
1538 | switch (RLT) { | |||
1539 | case ToolChain::RLT_CompilerRT: | |||
1540 | CmdArgs.push_back(TC.getCompilerRTArgString(Args, "builtins")); | |||
1541 | AddUnwindLibrary(TC, D, CmdArgs, Args); | |||
1542 | break; | |||
1543 | case ToolChain::RLT_Libgcc: | |||
1544 | // Make sure libgcc is not used under MSVC environment by default | |||
1545 | if (TC.getTriple().isKnownWindowsMSVCEnvironment()) { | |||
1546 | // Issue error diagnostic if libgcc is explicitly specified | |||
1547 | // through command line as --rtlib option argument. | |||
1548 | if (Args.hasArg(options::OPT_rtlib_EQ)) { | |||
1549 | TC.getDriver().Diag(diag::err_drv_unsupported_rtlib_for_platform) | |||
1550 | << Args.getLastArg(options::OPT_rtlib_EQ)->getValue() << "MSVC"; | |||
1551 | } | |||
1552 | } else | |||
1553 | AddLibgcc(TC, D, CmdArgs, Args); | |||
1554 | break; | |||
1555 | } | |||
1556 | ||||
1557 | // On Android, the unwinder uses dl_iterate_phdr (or one of | |||
1558 | // dl_unwind_find_exidx/__gnu_Unwind_Find_exidx on arm32) from libdl.so. For | |||
1559 | // statically-linked executables, these functions come from libc.a instead. | |||
1560 | if (TC.getTriple().isAndroid() && !Args.hasArg(options::OPT_static) && | |||
1561 | !Args.hasArg(options::OPT_static_pie)) | |||
1562 | CmdArgs.push_back("-ldl"); | |||
1563 | } | |||
1564 | ||||
1565 | SmallString<128> tools::getStatsFileName(const llvm::opt::ArgList &Args, | |||
1566 | const InputInfo &Output, | |||
1567 | const InputInfo &Input, | |||
1568 | const Driver &D) { | |||
1569 | const Arg *A = Args.getLastArg(options::OPT_save_stats_EQ); | |||
1570 | if (!A) | |||
1571 | return {}; | |||
1572 | ||||
1573 | StringRef SaveStats = A->getValue(); | |||
1574 | SmallString<128> StatsFile; | |||
1575 | if (SaveStats == "obj" && Output.isFilename()) { | |||
1576 | StatsFile.assign(Output.getFilename()); | |||
1577 | llvm::sys::path::remove_filename(StatsFile); | |||
1578 | } else if (SaveStats != "cwd") { | |||
1579 | D.Diag(diag::err_drv_invalid_value) << A->getAsString(Args) << SaveStats; | |||
1580 | return {}; | |||
1581 | } | |||
1582 | ||||
1583 | StringRef BaseName = llvm::sys::path::filename(Input.getBaseInput()); | |||
1584 | llvm::sys::path::append(StatsFile, BaseName); | |||
1585 | llvm::sys::path::replace_extension(StatsFile, "stats"); | |||
1586 | return StatsFile; | |||
1587 | } | |||
1588 | ||||
1589 | void tools::addMultilibFlag(bool Enabled, const char *const Flag, | |||
1590 | Multilib::flags_list &Flags) { | |||
1591 | Flags.push_back(std::string(Enabled ? "+" : "-") + Flag); | |||
1592 | } | |||
1593 | ||||
1594 | void tools::addX86AlignBranchArgs(const Driver &D, const ArgList &Args, | |||
1595 | ArgStringList &CmdArgs, bool IsLTO) { | |||
1596 | auto addArg = [&, IsLTO](const Twine &Arg) { | |||
1597 | if (IsLTO) { | |||
1598 | CmdArgs.push_back(Args.MakeArgString("-plugin-opt=" + Arg)); | |||
1599 | } else { | |||
1600 | CmdArgs.push_back("-mllvm"); | |||
1601 | CmdArgs.push_back(Args.MakeArgString(Arg)); | |||
1602 | } | |||
1603 | }; | |||
1604 | ||||
1605 | if (Args.hasArg(options::OPT_mbranches_within_32B_boundaries)) { | |||
1606 | addArg(Twine("-x86-branches-within-32B-boundaries")); | |||
1607 | } | |||
1608 | if (const Arg *A = Args.getLastArg(options::OPT_malign_branch_boundary_EQ)) { | |||
1609 | StringRef Value = A->getValue(); | |||
1610 | unsigned Boundary; | |||
1611 | if (Value.getAsInteger(10, Boundary) || Boundary < 16 || | |||
1612 | !llvm::isPowerOf2_64(Boundary)) { | |||
1613 | D.Diag(diag::err_drv_invalid_argument_to_option) | |||
1614 | << Value << A->getOption().getName(); | |||
1615 | } else { | |||
1616 | addArg("-x86-align-branch-boundary=" + Twine(Boundary)); | |||
1617 | } | |||
1618 | } | |||
1619 | if (const Arg *A = Args.getLastArg(options::OPT_malign_branch_EQ)) { | |||
1620 | std::string AlignBranch; | |||
1621 | for (StringRef T : A->getValues()) { | |||
1622 | if (T != "fused" && T != "jcc" && T != "jmp" && T != "call" && | |||
1623 | T != "ret" && T != "indirect") | |||
1624 | D.Diag(diag::err_drv_invalid_malign_branch_EQ) | |||
1625 | << T << "fused, jcc, jmp, call, ret, indirect"; | |||
1626 | if (!AlignBranch.empty()) | |||
1627 | AlignBranch += '+'; | |||
1628 | AlignBranch += T; | |||
1629 | } | |||
1630 | addArg("-x86-align-branch=" + Twine(AlignBranch)); | |||
1631 | } | |||
1632 | if (const Arg *A = Args.getLastArg(options::OPT_mpad_max_prefix_size_EQ)) { | |||
1633 | StringRef Value = A->getValue(); | |||
1634 | unsigned PrefixSize; | |||
1635 | if (Value.getAsInteger(10, PrefixSize)) { | |||
1636 | D.Diag(diag::err_drv_invalid_argument_to_option) | |||
1637 | << Value << A->getOption().getName(); | |||
1638 | } else { | |||
1639 | addArg("-x86-pad-max-prefix-size=" + Twine(PrefixSize)); | |||
1640 | } | |||
1641 | } | |||
1642 | } | |||
1643 | ||||
1644 | /// SDLSearch: Search for Static Device Library | |||
1645 | /// The search for SDL bitcode files is consistent with how static host | |||
1646 | /// libraries are discovered. That is, the -l option triggers a search for | |||
1647 | /// files in a set of directories called the LINKPATH. The host library search | |||
1648 | /// procedure looks for a specific filename in the LINKPATH. The filename for | |||
1649 | /// a host library is lib<libname>.a or lib<libname>.so. For SDLs, there is an | |||
1650 | /// ordered-set of filenames that are searched. We call this ordered-set of | |||
1651 | /// filenames as SEARCH-ORDER. Since an SDL can either be device-type specific, | |||
1652 | /// architecture specific, or generic across all architectures, a naming | |||
1653 | /// convention and search order is used where the file name embeds the | |||
1654 | /// architecture name <arch-name> (nvptx or amdgcn) and the GPU device type | |||
1655 | /// <device-name> such as sm_30 and gfx906. <device-name> is absent in case of | |||
1656 | /// device-independent SDLs. To reduce congestion in host library directories, | |||
1657 | /// the search first looks for files in the “libdevice” subdirectory. SDLs that | |||
1658 | /// are bc files begin with the prefix “lib”. | |||
1659 | /// | |||
1660 | /// Machine-code SDLs can also be managed as an archive (*.a file). The | |||
1661 | /// convention has been to use the prefix “lib”. To avoid confusion with host | |||
1662 | /// archive libraries, we use prefix "libbc-" for the bitcode SDL archives. | |||
1663 | /// | |||
1664 | bool tools::SDLSearch(const Driver &D, const llvm::opt::ArgList &DriverArgs, | |||
1665 | llvm::opt::ArgStringList &CC1Args, | |||
1666 | SmallVector<std::string, 8> LibraryPaths, std::string Lib, | |||
1667 | StringRef Arch, StringRef Target, bool isBitCodeSDL, | |||
1668 | bool postClangLink) { | |||
1669 | SmallVector<std::string, 12> SDLs; | |||
1670 | ||||
1671 | std::string LibDeviceLoc = "/libdevice"; | |||
1672 | std::string LibBcPrefix = "/libbc-"; | |||
1673 | std::string LibPrefix = "/lib"; | |||
1674 | ||||
1675 | if (isBitCodeSDL) { | |||
1676 | // SEARCH-ORDER for Bitcode SDLs: | |||
1677 | // libdevice/libbc-<libname>-<arch-name>-<device-type>.a | |||
1678 | // libbc-<libname>-<arch-name>-<device-type>.a | |||
1679 | // libdevice/libbc-<libname>-<arch-name>.a | |||
1680 | // libbc-<libname>-<arch-name>.a | |||
1681 | // libdevice/libbc-<libname>.a | |||
1682 | // libbc-<libname>.a | |||
1683 | // libdevice/lib<libname>-<arch-name>-<device-type>.bc | |||
1684 | // lib<libname>-<arch-name>-<device-type>.bc | |||
1685 | // libdevice/lib<libname>-<arch-name>.bc | |||
1686 | // lib<libname>-<arch-name>.bc | |||
1687 | // libdevice/lib<libname>.bc | |||
1688 | // lib<libname>.bc | |||
1689 | ||||
1690 | for (StringRef Base : {LibBcPrefix, LibPrefix}) { | |||
1691 | const auto *Ext = Base.contains(LibBcPrefix) ? ".a" : ".bc"; | |||
1692 | ||||
1693 | for (auto Suffix : {Twine(Lib + "-" + Arch + "-" + Target).str(), | |||
1694 | Twine(Lib + "-" + Arch).str(), Twine(Lib).str()}) { | |||
1695 | SDLs.push_back(Twine(LibDeviceLoc + Base + Suffix + Ext).str()); | |||
1696 | SDLs.push_back(Twine(Base + Suffix + Ext).str()); | |||
1697 | } | |||
1698 | } | |||
1699 | } else { | |||
1700 | // SEARCH-ORDER for Machine-code SDLs: | |||
1701 | // libdevice/lib<libname>-<arch-name>-<device-type>.a | |||
1702 | // lib<libname>-<arch-name>-<device-type>.a | |||
1703 | // libdevice/lib<libname>-<arch-name>.a | |||
1704 | // lib<libname>-<arch-name>.a | |||
1705 | ||||
1706 | const auto *Ext = ".a"; | |||
1707 | ||||
1708 | for (auto Suffix : {Twine(Lib + "-" + Arch + "-" + Target).str(), | |||
1709 | Twine(Lib + "-" + Arch).str()}) { | |||
1710 | SDLs.push_back(Twine(LibDeviceLoc + LibPrefix + Suffix + Ext).str()); | |||
1711 | SDLs.push_back(Twine(LibPrefix + Suffix + Ext).str()); | |||
1712 | } | |||
1713 | } | |||
1714 | ||||
1715 | // The CUDA toolchain does not use a global device llvm-link before the LLVM | |||
1716 | // backend generates ptx. So currently, the use of bitcode SDL for nvptx is | |||
1717 | // only possible with post-clang-cc1 linking. Clang cc1 has a feature that | |||
1718 | // will link libraries after clang compilation while the LLVM IR is still in | |||
1719 | // memory. This utilizes a clang cc1 option called “-mlink-builtin-bitcode”. | |||
1720 | // This is a clang -cc1 option that is generated by the clang driver. The | |||
1721 | // option value must a full path to an existing file. | |||
1722 | bool FoundSDL = false; | |||
1723 | for (auto LPath : LibraryPaths) { | |||
1724 | for (auto SDL : SDLs) { | |||
1725 | auto FullName = Twine(LPath + SDL).str(); | |||
1726 | if (llvm::sys::fs::exists(FullName)) { | |||
1727 | if (postClangLink) | |||
1728 | CC1Args.push_back("-mlink-builtin-bitcode"); | |||
1729 | CC1Args.push_back(DriverArgs.MakeArgString(FullName)); | |||
1730 | FoundSDL = true; | |||
1731 | break; | |||
1732 | } | |||
1733 | } | |||
1734 | if (FoundSDL) | |||
1735 | break; | |||
1736 | } | |||
1737 | return FoundSDL; | |||
1738 | } | |||
1739 | ||||
1740 | /// Search if a user provided archive file lib<libname>.a exists in any of | |||
1741 | /// the library paths. If so, add a new command to clang-offload-bundler to | |||
1742 | /// unbundle this archive and create a temporary device specific archive. Name | |||
1743 | /// of this SDL is passed to the llvm-link (for amdgcn) or to the | |||
1744 | /// clang-nvlink-wrapper (for nvptx) commands by the driver. | |||
1745 | bool tools::GetSDLFromOffloadArchive( | |||
1746 | Compilation &C, const Driver &D, const Tool &T, const JobAction &JA, | |||
1747 | const InputInfoList &Inputs, const llvm::opt::ArgList &DriverArgs, | |||
1748 | llvm::opt::ArgStringList &CC1Args, SmallVector<std::string, 8> LibraryPaths, | |||
1749 | StringRef Lib, StringRef Arch, StringRef Target, bool isBitCodeSDL, | |||
1750 | bool postClangLink) { | |||
1751 | ||||
1752 | // We don't support bitcode archive bundles for nvptx | |||
1753 | if (isBitCodeSDL && Arch.contains("nvptx")) | |||
1754 | return false; | |||
1755 | ||||
1756 | bool FoundAOB = false; | |||
1757 | SmallVector<std::string, 2> AOBFileNames; | |||
1758 | std::string ArchiveOfBundles; | |||
1759 | for (auto LPath : LibraryPaths) { | |||
1760 | ArchiveOfBundles.clear(); | |||
1761 | ||||
1762 | AOBFileNames.push_back(Twine(LPath + "/libdevice/lib" + Lib + ".a").str()); | |||
1763 | AOBFileNames.push_back(Twine(LPath + "/lib" + Lib + ".a").str()); | |||
1764 | ||||
1765 | for (auto AOB : AOBFileNames) { | |||
1766 | if (llvm::sys::fs::exists(AOB)) { | |||
1767 | ArchiveOfBundles = AOB; | |||
1768 | FoundAOB = true; | |||
1769 | break; | |||
1770 | } | |||
1771 | } | |||
1772 | ||||
1773 | if (!FoundAOB) | |||
1774 | continue; | |||
1775 | ||||
1776 | StringRef Prefix = isBitCodeSDL ? "libbc-" : "lib"; | |||
1777 | std::string OutputLib = D.GetTemporaryPath( | |||
1778 | Twine(Prefix + Lib + "-" + Arch + "-" + Target).str(), "a"); | |||
1779 | ||||
1780 | C.addTempFile(C.getArgs().MakeArgString(OutputLib)); | |||
1781 | ||||
1782 | ArgStringList CmdArgs; | |||
1783 | SmallString<128> DeviceTriple; | |||
1784 | DeviceTriple += Action::GetOffloadKindName(JA.getOffloadingDeviceKind()); | |||
1785 | DeviceTriple += '-'; | |||
1786 | std::string NormalizedTriple = T.getToolChain().getTriple().normalize(); | |||
1787 | DeviceTriple += NormalizedTriple; | |||
1788 | if (!Target.empty()) { | |||
1789 | DeviceTriple += '-'; | |||
1790 | DeviceTriple += Target; | |||
1791 | } | |||
1792 | ||||
1793 | std::string UnbundleArg("-unbundle"); | |||
1794 | std::string TypeArg("-type=a"); | |||
1795 | std::string InputArg("-input=" + ArchiveOfBundles); | |||
1796 | std::string OffloadArg("-targets=" + std::string(DeviceTriple)); | |||
1797 | std::string OutputArg("-output=" + OutputLib); | |||
1798 | ||||
1799 | const char *UBProgram = DriverArgs.MakeArgString( | |||
1800 | T.getToolChain().GetProgramPath("clang-offload-bundler")); | |||
1801 | ||||
1802 | ArgStringList UBArgs; | |||
1803 | UBArgs.push_back(C.getArgs().MakeArgString(UnbundleArg)); | |||
1804 | UBArgs.push_back(C.getArgs().MakeArgString(TypeArg)); | |||
1805 | UBArgs.push_back(C.getArgs().MakeArgString(InputArg)); | |||
1806 | UBArgs.push_back(C.getArgs().MakeArgString(OffloadArg)); | |||
1807 | UBArgs.push_back(C.getArgs().MakeArgString(OutputArg)); | |||
1808 | ||||
1809 | // Add this flag to not exit from clang-offload-bundler if no compatible | |||
1810 | // code object is found in heterogenous archive library. | |||
1811 | std::string AdditionalArgs("-allow-missing-bundles"); | |||
1812 | UBArgs.push_back(C.getArgs().MakeArgString(AdditionalArgs)); | |||
1813 | ||||
1814 | // Add this flag to treat hip and hipv4 offload kinds as compatible with | |||
1815 | // openmp offload kind while extracting code objects from a heterogenous | |||
1816 | // archive library. Vice versa is also considered compatible. | |||
1817 | std::string HipCompatibleArgs("-hip-openmp-compatible"); | |||
1818 | UBArgs.push_back(C.getArgs().MakeArgString(HipCompatibleArgs)); | |||
1819 | ||||
1820 | C.addCommand(std::make_unique<Command>( | |||
1821 | JA, T, ResponseFileSupport::AtFileCurCP(), UBProgram, UBArgs, Inputs, | |||
1822 | InputInfo(&JA, C.getArgs().MakeArgString(OutputLib)))); | |||
1823 | if (postClangLink) | |||
1824 | CC1Args.push_back("-mlink-builtin-bitcode"); | |||
1825 | ||||
1826 | CC1Args.push_back(DriverArgs.MakeArgString(OutputLib)); | |||
1827 | break; | |||
1828 | } | |||
1829 | ||||
1830 | return FoundAOB; | |||
1831 | } | |||
1832 | ||||
1833 | // Wrapper function used by driver for adding SDLs during link phase. | |||
1834 | void tools::AddStaticDeviceLibsLinking(Compilation &C, const Tool &T, | |||
1835 | const JobAction &JA, | |||
1836 | const InputInfoList &Inputs, | |||
1837 | const llvm::opt::ArgList &DriverArgs, | |||
1838 | llvm::opt::ArgStringList &CC1Args, | |||
1839 | StringRef Arch, StringRef Target, | |||
1840 | bool isBitCodeSDL, bool postClangLink) { | |||
1841 | AddStaticDeviceLibs(&C, &T, &JA, &Inputs, C.getDriver(), DriverArgs, CC1Args, | |||
1842 | Arch, Target, isBitCodeSDL, postClangLink); | |||
1843 | } | |||
1844 | ||||
1845 | // Wrapper function used for post clang linking of bitcode SDLS for nvptx by | |||
1846 | // the CUDA toolchain. | |||
1847 | void tools::AddStaticDeviceLibsPostLinking(const Driver &D, | |||
1848 | const llvm::opt::ArgList &DriverArgs, | |||
1849 | llvm::opt::ArgStringList &CC1Args, | |||
1850 | StringRef Arch, StringRef Target, | |||
1851 | bool isBitCodeSDL, bool postClangLink) { | |||
1852 | AddStaticDeviceLibs(nullptr, nullptr, nullptr, nullptr, D, DriverArgs, | |||
| ||||
1853 | CC1Args, Arch, Target, isBitCodeSDL, postClangLink); | |||
1854 | } | |||
1855 | ||||
1856 | // User defined Static Device Libraries(SDLs) can be passed to clang for | |||
1857 | // offloading GPU compilers. Like static host libraries, the use of a SDL is | |||
1858 | // specified with the -l command line option. The primary difference between | |||
1859 | // host and SDLs is the filenames for SDLs (refer SEARCH-ORDER for Bitcode SDLs | |||
1860 | // and SEARCH-ORDER for Machine-code SDLs for the naming convention). | |||
1861 | // SDLs are of following types: | |||
1862 | // | |||
1863 | // * Bitcode SDLs: They can either be a *.bc file or an archive of *.bc files. | |||
1864 | // For NVPTX, these libraries are post-clang linked following each | |||
1865 | // compilation. For AMDGPU, these libraries are linked one time | |||
1866 | // during the application link phase. | |||
1867 | // | |||
1868 | // * Machine-code SDLs: They are archive files. For NVPTX, the archive members | |||
1869 | // contain cubin for Nvidia GPUs and are linked one time during the | |||
1870 | // link phase by the CUDA SDK linker called nvlink. For AMDGPU, the | |||
1871 | // process for machine code SDLs is still in development. But they | |||
1872 | // will be linked by the LLVM tool lld. | |||
1873 | // | |||
1874 | // * Bundled objects that contain both host and device codes: Bundled objects | |||
1875 | // may also contain library code compiled from source. For NVPTX, the | |||
1876 | // bundle contains cubin. For AMDGPU, the bundle contains bitcode. | |||
1877 | // | |||
1878 | // For Bitcode and Machine-code SDLs, current compiler toolchains hardcode the | |||
1879 | // inclusion of specific SDLs such as math libraries and the OpenMP device | |||
1880 | // library libomptarget. | |||
1881 | void tools::AddStaticDeviceLibs(Compilation *C, const Tool *T, | |||
1882 | const JobAction *JA, | |||
1883 | const InputInfoList *Inputs, const Driver &D, | |||
1884 | const llvm::opt::ArgList &DriverArgs, | |||
1885 | llvm::opt::ArgStringList &CC1Args, | |||
1886 | StringRef Arch, StringRef Target, | |||
1887 | bool isBitCodeSDL, bool postClangLink) { | |||
1888 | ||||
1889 | SmallVector<std::string, 8> LibraryPaths; | |||
1890 | // Add search directories from LIBRARY_PATH env variable | |||
1891 | llvm::Optional<std::string> LibPath = | |||
1892 | llvm::sys::Process::GetEnv("LIBRARY_PATH"); | |||
1893 | if (LibPath) { | |||
1894 | SmallVector<StringRef, 8> Frags; | |||
1895 | const char EnvPathSeparatorStr[] = {llvm::sys::EnvPathSeparator, '\0'}; | |||
1896 | llvm::SplitString(*LibPath, Frags, EnvPathSeparatorStr); | |||
1897 | for (StringRef Path : Frags) | |||
1898 | LibraryPaths.emplace_back(Path.trim()); | |||
1899 | } | |||
1900 | ||||
1901 | // Add directories from user-specified -L options | |||
1902 | for (std::string Search_Dir : DriverArgs.getAllArgValues(options::OPT_L)) | |||
1903 | LibraryPaths.emplace_back(Search_Dir); | |||
1904 | ||||
1905 | // Add path to lib-debug folders | |||
1906 | SmallString<256> DefaultLibPath = llvm::sys::path::parent_path(D.Dir); | |||
1907 | llvm::sys::path::append(DefaultLibPath, Twine("lib") + CLANG_LIBDIR_SUFFIX""); | |||
1908 | LibraryPaths.emplace_back(DefaultLibPath.c_str()); | |||
1909 | ||||
1910 | // Build list of Static Device Libraries SDLs specified by -l option | |||
1911 | llvm::SmallSet<std::string, 16> SDLNames; | |||
1912 | static const StringRef HostOnlyArchives[] = { | |||
1913 | "omp", "cudart", "m", "gcc", "gcc_s", "pthread", "hip_hcc"}; | |||
1914 | for (auto SDLName : DriverArgs.getAllArgValues(options::OPT_l)) { | |||
1915 | if (!HostOnlyArchives->contains(SDLName)) { | |||
1916 | SDLNames.insert(SDLName); | |||
1917 | } | |||
1918 | } | |||
1919 | ||||
1920 | // The search stops as soon as an SDL file is found. The driver then provides | |||
1921 | // the full filename of the SDL to the llvm-link or clang-nvlink-wrapper | |||
1922 | // command. If no SDL is found after searching each LINKPATH with | |||
1923 | // SEARCH-ORDER, it is possible that an archive file lib<libname>.a exists | |||
1924 | // and may contain bundled object files. | |||
1925 | for (auto SDLName : SDLNames) { | |||
1926 | // This is the only call to SDLSearch | |||
1927 | if (!SDLSearch(D, DriverArgs, CC1Args, LibraryPaths, SDLName, Arch, Target, | |||
1928 | isBitCodeSDL, postClangLink)) { | |||
1929 | GetSDLFromOffloadArchive(*C, D, *T, *JA, *Inputs, DriverArgs, CC1Args, | |||
| ||||
1930 | LibraryPaths, SDLName, Arch, Target, | |||
1931 | isBitCodeSDL, postClangLink); | |||
1932 | } | |||
1933 | } | |||
1934 | } | |||
1935 | ||||
1936 | static llvm::opt::Arg * | |||
1937 | getAMDGPUCodeObjectArgument(const Driver &D, const llvm::opt::ArgList &Args) { | |||
1938 | // The last of -mcode-object-v3, -mno-code-object-v3 and | |||
1939 | // -mcode-object-version=<version> wins. | |||
1940 | return Args.getLastArg(options::OPT_mcode_object_v3_legacy, | |||
1941 | options::OPT_mno_code_object_v3_legacy, | |||
1942 | options::OPT_mcode_object_version_EQ); | |||
1943 | } | |||
1944 | ||||
1945 | void tools::checkAMDGPUCodeObjectVersion(const Driver &D, | |||
1946 | const llvm::opt::ArgList &Args) { | |||
1947 | const unsigned MinCodeObjVer = 2; | |||
1948 | const unsigned MaxCodeObjVer = 5; | |||
1949 | ||||
1950 | // Emit warnings for legacy options even if they are overridden. | |||
1951 | if (Args.hasArg(options::OPT_mno_code_object_v3_legacy)) | |||
1952 | D.Diag(diag::warn_drv_deprecated_arg) << "-mno-code-object-v3" | |||
1953 | << "-mcode-object-version=2"; | |||
1954 | ||||
1955 | if (Args.hasArg(options::OPT_mcode_object_v3_legacy)) | |||
1956 | D.Diag(diag::warn_drv_deprecated_arg) << "-mcode-object-v3" | |||
1957 | << "-mcode-object-version=3"; | |||
1958 | ||||
1959 | if (auto *CodeObjArg = getAMDGPUCodeObjectArgument(D, Args)) { | |||
1960 | if (CodeObjArg->getOption().getID() == | |||
1961 | options::OPT_mcode_object_version_EQ) { | |||
1962 | unsigned CodeObjVer = MaxCodeObjVer; | |||
1963 | auto Remnant = | |||
1964 | StringRef(CodeObjArg->getValue()).getAsInteger(0, CodeObjVer); | |||
1965 | if (Remnant || CodeObjVer < MinCodeObjVer || CodeObjVer > MaxCodeObjVer) | |||
1966 | D.Diag(diag::err_drv_invalid_int_value) | |||
1967 | << CodeObjArg->getAsString(Args) << CodeObjArg->getValue(); | |||
1968 | } | |||
1969 | } | |||
1970 | } | |||
1971 | ||||
1972 | unsigned tools::getAMDGPUCodeObjectVersion(const Driver &D, | |||
1973 | const llvm::opt::ArgList &Args) { | |||
1974 | unsigned CodeObjVer = 4; // default | |||
1975 | if (auto *CodeObjArg = getAMDGPUCodeObjectArgument(D, Args)) { | |||
1976 | if (CodeObjArg->getOption().getID() == | |||
1977 | options::OPT_mno_code_object_v3_legacy) { | |||
1978 | CodeObjVer = 2; | |||
1979 | } else if (CodeObjArg->getOption().getID() == | |||
1980 | options::OPT_mcode_object_v3_legacy) { | |||
1981 | CodeObjVer = 3; | |||
1982 | } else { | |||
1983 | StringRef(CodeObjArg->getValue()).getAsInteger(0, CodeObjVer); | |||
1984 | } | |||
1985 | } | |||
1986 | return CodeObjVer; | |||
1987 | } | |||
1988 | ||||
1989 | bool tools::haveAMDGPUCodeObjectVersionArgument( | |||
1990 | const Driver &D, const llvm::opt::ArgList &Args) { | |||
1991 | return getAMDGPUCodeObjectArgument(D, Args) != nullptr; | |||
1992 | } | |||
1993 | ||||
1994 | void tools::addMachineOutlinerArgs(const Driver &D, | |||
1995 | const llvm::opt::ArgList &Args, | |||
1996 | llvm::opt::ArgStringList &CmdArgs, | |||
1997 | const llvm::Triple &Triple, bool IsLTO) { | |||
1998 | auto addArg = [&, IsLTO](const Twine &Arg) { | |||
1999 | if (IsLTO) { | |||
2000 | CmdArgs.push_back(Args.MakeArgString("-plugin-opt=" + Arg)); | |||
2001 | } else { | |||
2002 | CmdArgs.push_back("-mllvm"); | |||
2003 | CmdArgs.push_back(Args.MakeArgString(Arg)); | |||
2004 | } | |||
2005 | }; | |||
2006 | ||||
2007 | if (Arg *A = Args.getLastArg(options::OPT_moutline, | |||
2008 | options::OPT_mno_outline)) { | |||
2009 | if (A->getOption().matches(options::OPT_moutline)) { | |||
2010 | // We only support -moutline in AArch64 and ARM targets right now. If | |||
2011 | // we're not compiling for these, emit a warning and ignore the flag. | |||
2012 | // Otherwise, add the proper mllvm flags. | |||
2013 | if (!(Triple.isARM() || Triple.isThumb() || | |||
2014 | Triple.getArch() == llvm::Triple::aarch64 || | |||
2015 | Triple.getArch() == llvm::Triple::aarch64_32)) { | |||
2016 | D.Diag(diag::warn_drv_moutline_unsupported_opt) << Triple.getArchName(); | |||
2017 | } else { | |||
2018 | addArg(Twine("-enable-machine-outliner")); | |||
2019 | } | |||
2020 | } else { | |||
2021 | // Disable all outlining behaviour. | |||
2022 | addArg(Twine("-enable-machine-outliner=never")); | |||
2023 | } | |||
2024 | } | |||
2025 | } | |||
2026 | ||||
2027 | void tools::addOpenMPDeviceRTL(const Driver &D, | |||
2028 | const llvm::opt::ArgList &DriverArgs, | |||
2029 | llvm::opt::ArgStringList &CC1Args, | |||
2030 | StringRef BitcodeSuffix, | |||
2031 | const llvm::Triple &Triple) { | |||
2032 | SmallVector<StringRef, 8> LibraryPaths; | |||
2033 | ||||
2034 | // Add path to clang lib / lib64 folder. | |||
2035 | SmallString<256> DefaultLibPath = llvm::sys::path::parent_path(D.Dir); | |||
2036 | llvm::sys::path::append(DefaultLibPath, Twine("lib") + CLANG_LIBDIR_SUFFIX""); | |||
2037 | LibraryPaths.emplace_back(DefaultLibPath.c_str()); | |||
2038 | ||||
2039 | // Add user defined library paths from LIBRARY_PATH. | |||
2040 | llvm::Optional<std::string> LibPath = | |||
2041 | llvm::sys::Process::GetEnv("LIBRARY_PATH"); | |||
2042 | if (LibPath) { | |||
2043 | SmallVector<StringRef, 8> Frags; | |||
2044 | const char EnvPathSeparatorStr[] = {llvm::sys::EnvPathSeparator, '\0'}; | |||
2045 | llvm::SplitString(*LibPath, Frags, EnvPathSeparatorStr); | |||
2046 | for (StringRef Path : Frags) | |||
2047 | LibraryPaths.emplace_back(Path.trim()); | |||
2048 | } | |||
2049 | ||||
2050 | OptSpecifier LibomptargetBCPathOpt = | |||
2051 | Triple.isAMDGCN() ? options::OPT_libomptarget_amdgpu_bc_path_EQ | |||
2052 | : options::OPT_libomptarget_nvptx_bc_path_EQ; | |||
2053 | ||||
2054 | StringRef ArchPrefix = Triple.isAMDGCN() ? "amdgpu" : "nvptx"; | |||
2055 | std::string LibOmpTargetName = | |||
2056 | ("libomptarget-" + ArchPrefix + "-" + BitcodeSuffix + ".bc").str(); | |||
2057 | ||||
2058 | // First check whether user specifies bc library | |||
2059 | if (const Arg *A = DriverArgs.getLastArg(LibomptargetBCPathOpt)) { | |||
2060 | SmallString<128> LibOmpTargetFile(A->getValue()); | |||
2061 | if (llvm::sys::fs::exists(LibOmpTargetFile) && | |||
2062 | llvm::sys::fs::is_directory(LibOmpTargetFile)) { | |||
2063 | llvm::sys::path::append(LibOmpTargetFile, LibOmpTargetName); | |||
2064 | } | |||
2065 | ||||
2066 | if (llvm::sys::fs::exists(LibOmpTargetFile)) { | |||
2067 | CC1Args.push_back("-mlink-builtin-bitcode"); | |||
2068 | CC1Args.push_back(DriverArgs.MakeArgString(LibOmpTargetFile)); | |||
2069 | } else { | |||
2070 | D.Diag(diag::err_drv_omp_offload_target_bcruntime_not_found) | |||
2071 | << LibOmpTargetFile; | |||
2072 | } | |||
2073 | } else { | |||
2074 | bool FoundBCLibrary = false; | |||
2075 | ||||
2076 | for (StringRef LibraryPath : LibraryPaths) { | |||
2077 | SmallString<128> LibOmpTargetFile(LibraryPath); | |||
2078 | llvm::sys::path::append(LibOmpTargetFile, LibOmpTargetName); | |||
2079 | if (llvm::sys::fs::exists(LibOmpTargetFile)) { | |||
2080 | CC1Args.push_back("-mlink-builtin-bitcode"); | |||
2081 | CC1Args.push_back(DriverArgs.MakeArgString(LibOmpTargetFile)); | |||
2082 | FoundBCLibrary = true; | |||
2083 | break; | |||
2084 | } | |||
2085 | } | |||
2086 | ||||
2087 | if (!FoundBCLibrary) | |||
2088 | D.Diag(diag::err_drv_omp_offload_target_missingbcruntime) | |||
2089 | << LibOmpTargetName << ArchPrefix; | |||
2090 | } | |||
2091 | } |