Bug Summary

File:build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/clang/lib/Driver/ToolChains/CommonArgs.cpp
Warning:line 1929, column 7
Forming reference to null pointer

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name CommonArgs.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mframe-pointer=none -relaxed-aliasing -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm -resource-dir /usr/lib/llvm-15/lib/clang/15.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I tools/clang/lib/Driver -I /build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/clang/lib/Driver -I /build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/clang/include -I tools/clang/include -I include -I /build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/llvm/include -D _FORTIFY_SOURCE=2 -D NDEBUG -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/backward -internal-isystem /usr/lib/llvm-15/lib/clang/15.0.0/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fmacro-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm=build-llvm -fmacro-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/= -fcoverage-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm=build-llvm -fcoverage-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/= -O3 -Wno-unused-command-line-argument -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm -fdebug-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm=build-llvm -fdebug-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/= -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fcolor-diagnostics -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2022-04-20-140412-16051-1 -x c++ /build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/clang/lib/Driver/ToolChains/CommonArgs.cpp
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
61using namespace clang::driver;
62using namespace clang::driver::tools;
63using namespace clang;
64using namespace llvm::opt;
65
66static 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
80static 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
110static 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
122void 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
128void 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
146std::vector<StringRef>
147tools::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
171void 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
225void 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
289void 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
307void 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.
320static 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
337static 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.
345static 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
363std::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
479llvm::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.
490bool tools::isUseSeparateSections(const llvm::Triple &Triple) {
491 return Triple.getOS() == llvm::Triple::CloudABI;
492}
493
494void 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
657void 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
673void 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
684void 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
700bool 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
748static 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.
765static 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
780const 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
793void 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
818static void
819collectSanitizerRuntimes(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.
959bool 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
1028bool 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
1044void 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
1057bool 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
1065const 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
1096void 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.
1127void 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
1135Arg *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
1148Arg *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).
1168std::tuple<llvm::Reloc::Model, unsigned, bool>
1169tools::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.
1390unsigned 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
1408unsigned 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
1423void 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.
1436bool tools::isObjCAutoRefCount(const ArgList &Args) {
1437 return Args.hasFlag(options::OPT_fobjc_arc, options::OPT_fno_objc_arc, false);
1438}
1439
1440enum class LibGccType { UnspecifiedLibGcc, StaticLibGcc, SharedLibGcc };
1441
1442static 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
1472static 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
1523static 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
1533void 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
1565SmallString<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
1589void tools::addMultilibFlag(bool Enabled, const char *const Flag,
1590 Multilib::flags_list &Flags) {
1591 Flags.push_back(std::string(Enabled ? "+" : "-") + Flag);
1592}
1593
1594void 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///
1664bool 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.
1745bool 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.
1834void 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.
1847void 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,
1
Passing null pointer value via 1st parameter 'C'
2
Calling 'AddStaticDeviceLibs'
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.
1881void 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) {
3
Assuming the condition is false
4
Taking false branch
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,
5
Assuming the condition is true
6
Taking true branch
1928 isBitCodeSDL, postClangLink)) {
1929 GetSDLFromOffloadArchive(*C, D, *T, *JA, *Inputs, DriverArgs, CC1Args,
7
Forming reference to null pointer
1930 LibraryPaths, SDLName, Arch, Target,
1931 isBitCodeSDL, postClangLink);
1932 }
1933 }
1934}
1935
1936static llvm::opt::Arg *
1937getAMDGPUCodeObjectArgument(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
1945void 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
1972unsigned 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
1989bool tools::haveAMDGPUCodeObjectVersionArgument(
1990 const Driver &D, const llvm::opt::ArgList &Args) {
1991 return getAMDGPUCodeObjectArgument(D, Args) != nullptr;
1992}
1993
1994void 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
2027void 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}