1 //===--- Hexagon.cpp - Hexagon ToolChain Implementations --------*- 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 "Hexagon.h" 10 #include "CommonArgs.h" 11 #include "clang/Driver/Compilation.h" 12 #include "clang/Driver/Driver.h" 13 #include "clang/Driver/DriverDiagnostic.h" 14 #include "clang/Driver/InputInfo.h" 15 #include "clang/Driver/Options.h" 16 #include "llvm/ADT/StringExtras.h" 17 #include "llvm/Option/ArgList.h" 18 #include "llvm/Support/FileSystem.h" 19 #include "llvm/Support/Path.h" 20 #include "llvm/Support/VirtualFileSystem.h" 21 22 using namespace clang::driver; 23 using namespace clang::driver::tools; 24 using namespace clang::driver::toolchains; 25 using namespace clang; 26 using namespace llvm::opt; 27 28 // Default hvx-length for various versions. 29 static StringRef getDefaultHvxLength(StringRef HvxVer) { 30 return llvm::StringSwitch<StringRef>(HvxVer) 31 .Case("v60", "64b") 32 .Case("v62", "64b") 33 .Case("v65", "64b") 34 .Default("128b"); 35 } 36 37 static void handleHVXWarnings(const Driver &D, const ArgList &Args) { 38 // Handle the unsupported values passed to mhvx-length. 39 if (Arg *A = Args.getLastArg(options::OPT_mhexagon_hvx_length_EQ)) { 40 StringRef Val = A->getValue(); 41 if (!Val.equals_insensitive("64b") && !Val.equals_insensitive("128b")) 42 D.Diag(diag::err_drv_unsupported_option_argument) 43 << A->getSpelling() << Val; 44 } 45 } 46 47 // Handle hvx target features explicitly. 48 static void handleHVXTargetFeatures(const Driver &D, const ArgList &Args, 49 std::vector<StringRef> &Features, 50 StringRef Cpu, bool &HasHVX) { 51 // Handle HVX warnings. 52 handleHVXWarnings(D, Args); 53 54 auto makeFeature = [&Args](Twine T, bool Enable) -> StringRef { 55 const std::string &S = T.str(); 56 StringRef Opt(S); 57 if (Opt.endswith("=")) 58 Opt = Opt.drop_back(1); 59 if (Opt.startswith("mno-")) 60 Opt = Opt.drop_front(4); 61 else if (Opt.startswith("m")) 62 Opt = Opt.drop_front(1); 63 return Args.MakeArgString(Twine(Enable ? "+" : "-") + Twine(Opt)); 64 }; 65 66 auto withMinus = [](StringRef S) -> std::string { 67 return "-" + S.str(); 68 }; 69 70 // Drop tiny core suffix for HVX version. 71 std::string HvxVer = 72 (Cpu.back() == 'T' || Cpu.back() == 't' ? Cpu.drop_back(1) : Cpu).str(); 73 HasHVX = false; 74 75 // Handle -mhvx, -mhvx=, -mno-hvx. If versioned and versionless flags 76 // are both present, the last one wins. 77 Arg *HvxEnablingArg = 78 Args.getLastArg(options::OPT_mhexagon_hvx, options::OPT_mhexagon_hvx_EQ, 79 options::OPT_mno_hexagon_hvx); 80 if (HvxEnablingArg) { 81 if (HvxEnablingArg->getOption().matches(options::OPT_mno_hexagon_hvx)) 82 HvxEnablingArg = nullptr; 83 } 84 85 if (HvxEnablingArg) { 86 // If -mhvx[=] was given, it takes precedence. 87 if (Arg *A = Args.getLastArg(options::OPT_mhexagon_hvx, 88 options::OPT_mhexagon_hvx_EQ)) { 89 // If the version was given, set HvxVer. Otherwise HvxVer 90 // will remain equal to the CPU version. 91 if (A->getOption().matches(options::OPT_mhexagon_hvx_EQ)) 92 HvxVer = StringRef(A->getValue()).lower(); 93 } 94 HasHVX = true; 95 Features.push_back(makeFeature(Twine("hvx") + HvxVer, true)); 96 } else if (Arg *A = Args.getLastArg(options::OPT_mno_hexagon_hvx)) { 97 // If there was an explicit -mno-hvx, add -hvx to target features. 98 Features.push_back(makeFeature(A->getOption().getName(), false)); 99 } 100 101 StringRef HvxLen = getDefaultHvxLength(HvxVer); 102 103 // Handle -mhvx-length=. 104 if (Arg *A = Args.getLastArg(options::OPT_mhexagon_hvx_length_EQ)) { 105 // These flags are valid only if HVX in enabled. 106 if (!HasHVX) 107 D.Diag(diag::err_drv_needs_hvx) << withMinus(A->getOption().getName()); 108 else if (A->getOption().matches(options::OPT_mhexagon_hvx_length_EQ)) 109 HvxLen = A->getValue(); 110 } 111 112 if (HasHVX) { 113 StringRef L = makeFeature(Twine("hvx-length") + HvxLen.lower(), true); 114 Features.push_back(L); 115 } 116 117 unsigned HvxVerNum; 118 // getAsInteger returns 'true' on error. 119 if (StringRef(HvxVer).drop_front(1).getAsInteger(10, HvxVerNum)) 120 HvxVerNum = 0; 121 122 // Handle HVX floating point flags. 123 auto checkFlagHvxVersion = 124 [&](auto FlagOn, auto FlagOff, 125 unsigned MinVerNum) -> std::optional<StringRef> { 126 // Return an std::optional<StringRef>: 127 // - std::nullopt indicates a verification failure, or that the flag was not 128 // present in Args. 129 // - Otherwise the returned value is that name of the feature to add 130 // to Features. 131 Arg *A = Args.getLastArg(FlagOn, FlagOff); 132 if (!A) 133 return std::nullopt; 134 135 StringRef OptName = A->getOption().getName(); 136 if (A->getOption().matches(FlagOff)) 137 return makeFeature(OptName, false); 138 139 if (!HasHVX) { 140 D.Diag(diag::err_drv_needs_hvx) << withMinus(OptName); 141 return std::nullopt; 142 } 143 if (HvxVerNum < MinVerNum) { 144 D.Diag(diag::err_drv_needs_hvx_version) 145 << withMinus(OptName) << ("v" + std::to_string(HvxVerNum)); 146 return std::nullopt; 147 } 148 return makeFeature(OptName, true); 149 }; 150 151 if (auto F = checkFlagHvxVersion(options::OPT_mhexagon_hvx_qfloat, 152 options::OPT_mno_hexagon_hvx_qfloat, 68)) { 153 Features.push_back(*F); 154 } 155 if (auto F = checkFlagHvxVersion(options::OPT_mhexagon_hvx_ieee_fp, 156 options::OPT_mno_hexagon_hvx_ieee_fp, 68)) { 157 Features.push_back(*F); 158 } 159 } 160 161 // Hexagon target features. 162 void hexagon::getHexagonTargetFeatures(const Driver &D, 163 const llvm::Triple &Triple, 164 const ArgList &Args, 165 std::vector<StringRef> &Features) { 166 handleTargetFeaturesGroup(D, Triple, Args, Features, 167 options::OPT_m_hexagon_Features_Group); 168 169 bool UseLongCalls = false; 170 if (Arg *A = Args.getLastArg(options::OPT_mlong_calls, 171 options::OPT_mno_long_calls)) { 172 if (A->getOption().matches(options::OPT_mlong_calls)) 173 UseLongCalls = true; 174 } 175 176 Features.push_back(UseLongCalls ? "+long-calls" : "-long-calls"); 177 178 bool HasHVX = false; 179 StringRef Cpu(toolchains::HexagonToolChain::GetTargetCPUVersion(Args)); 180 // 't' in Cpu denotes tiny-core micro-architecture. For now, the co-processors 181 // have no dependency on micro-architecture. 182 const bool TinyCore = Cpu.contains('t'); 183 184 if (TinyCore) 185 Cpu = Cpu.take_front(Cpu.size() - 1); 186 187 handleHVXTargetFeatures(D, Args, Features, Cpu, HasHVX); 188 189 if (HexagonToolChain::isAutoHVXEnabled(Args) && !HasHVX) 190 D.Diag(diag::warn_drv_needs_hvx) << "auto-vectorization"; 191 } 192 193 // Hexagon tools start. 194 void hexagon::Assembler::RenderExtraToolArgs(const JobAction &JA, 195 ArgStringList &CmdArgs) const { 196 } 197 198 void hexagon::Assembler::ConstructJob(Compilation &C, const JobAction &JA, 199 const InputInfo &Output, 200 const InputInfoList &Inputs, 201 const ArgList &Args, 202 const char *LinkingOutput) const { 203 claimNoWarnArgs(Args); 204 205 auto &HTC = static_cast<const toolchains::HexagonToolChain&>(getToolChain()); 206 const Driver &D = HTC.getDriver(); 207 ArgStringList CmdArgs; 208 209 CmdArgs.push_back("--arch=hexagon"); 210 211 RenderExtraToolArgs(JA, CmdArgs); 212 213 const char *AsName = "llvm-mc"; 214 CmdArgs.push_back("-filetype=obj"); 215 CmdArgs.push_back(Args.MakeArgString( 216 "-mcpu=hexagon" + 217 toolchains::HexagonToolChain::GetTargetCPUVersion(Args))); 218 219 addSanitizerRuntimes(HTC, Args, CmdArgs); 220 221 if (Output.isFilename()) { 222 CmdArgs.push_back("-o"); 223 CmdArgs.push_back(Output.getFilename()); 224 } else { 225 assert(Output.isNothing() && "Unexpected output"); 226 CmdArgs.push_back("-fsyntax-only"); 227 } 228 229 if (Arg *A = Args.getLastArg(options::OPT_mhexagon_hvx_ieee_fp, 230 options::OPT_mno_hexagon_hvx_ieee_fp)) { 231 if (A->getOption().matches(options::OPT_mhexagon_hvx_ieee_fp)) 232 CmdArgs.push_back("-mhvx-ieee-fp"); 233 } 234 235 if (auto G = toolchains::HexagonToolChain::getSmallDataThreshold(Args)) { 236 CmdArgs.push_back(Args.MakeArgString("-gpsize=" + Twine(*G))); 237 } 238 239 Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler); 240 241 // Only pass -x if gcc will understand it; otherwise hope gcc 242 // understands the suffix correctly. The main use case this would go 243 // wrong in is for linker inputs if they happened to have an odd 244 // suffix; really the only way to get this to happen is a command 245 // like '-x foobar a.c' which will treat a.c like a linker input. 246 // 247 // FIXME: For the linker case specifically, can we safely convert 248 // inputs into '-Wl,' options? 249 for (const auto &II : Inputs) { 250 // Don't try to pass LLVM or AST inputs to a generic gcc. 251 if (types::isLLVMIR(II.getType())) 252 D.Diag(clang::diag::err_drv_no_linker_llvm_support) 253 << HTC.getTripleString(); 254 else if (II.getType() == types::TY_AST) 255 D.Diag(clang::diag::err_drv_no_ast_support) 256 << HTC.getTripleString(); 257 else if (II.getType() == types::TY_ModuleFile) 258 D.Diag(diag::err_drv_no_module_support) 259 << HTC.getTripleString(); 260 261 if (II.isFilename()) 262 CmdArgs.push_back(II.getFilename()); 263 else 264 // Don't render as input, we need gcc to do the translations. 265 // FIXME: What is this? 266 II.getInputArg().render(Args, CmdArgs); 267 } 268 269 auto *Exec = Args.MakeArgString(HTC.GetProgramPath(AsName)); 270 C.addCommand(std::make_unique<Command>(JA, *this, 271 ResponseFileSupport::AtFileCurCP(), 272 Exec, CmdArgs, Inputs, Output)); 273 } 274 275 void hexagon::Linker::RenderExtraToolArgs(const JobAction &JA, 276 ArgStringList &CmdArgs) const { 277 } 278 279 static void 280 constructHexagonLinkArgs(Compilation &C, const JobAction &JA, 281 const toolchains::HexagonToolChain &HTC, 282 const InputInfo &Output, const InputInfoList &Inputs, 283 const ArgList &Args, ArgStringList &CmdArgs, 284 const char *LinkingOutput) { 285 286 const Driver &D = HTC.getDriver(); 287 288 //---------------------------------------------------------------------------- 289 // 290 //---------------------------------------------------------------------------- 291 bool IsStatic = Args.hasArg(options::OPT_static); 292 bool IsShared = Args.hasArg(options::OPT_shared); 293 bool IsPIE = Args.hasArg(options::OPT_pie); 294 bool IncStdLib = !Args.hasArg(options::OPT_nostdlib); 295 bool IncStartFiles = !Args.hasArg(options::OPT_nostartfiles); 296 bool IncDefLibs = !Args.hasArg(options::OPT_nodefaultlibs); 297 bool UseG0 = false; 298 const char *Exec = Args.MakeArgString(HTC.GetLinkerPath()); 299 bool UseLLD = (llvm::sys::path::filename(Exec).equals_insensitive("ld.lld") || 300 llvm::sys::path::stem(Exec).equals_insensitive("ld.lld")); 301 bool UseShared = IsShared && !IsStatic; 302 StringRef CpuVer = toolchains::HexagonToolChain::GetTargetCPUVersion(Args); 303 304 bool NeedsSanitizerDeps = addSanitizerRuntimes(HTC, Args, CmdArgs); 305 bool NeedsXRayDeps = addXRayRuntime(HTC, Args, CmdArgs); 306 307 //---------------------------------------------------------------------------- 308 // Silence warnings for various options 309 //---------------------------------------------------------------------------- 310 Args.ClaimAllArgs(options::OPT_g_Group); 311 Args.ClaimAllArgs(options::OPT_emit_llvm); 312 Args.ClaimAllArgs(options::OPT_w); // Other warning options are already 313 // handled somewhere else. 314 Args.ClaimAllArgs(options::OPT_static_libgcc); 315 316 //---------------------------------------------------------------------------- 317 // 318 //---------------------------------------------------------------------------- 319 if (Args.hasArg(options::OPT_s)) 320 CmdArgs.push_back("-s"); 321 322 if (Args.hasArg(options::OPT_r)) 323 CmdArgs.push_back("-r"); 324 325 for (const auto &Opt : HTC.ExtraOpts) 326 CmdArgs.push_back(Opt.c_str()); 327 328 if (!UseLLD) { 329 CmdArgs.push_back("-march=hexagon"); 330 CmdArgs.push_back(Args.MakeArgString("-mcpu=hexagon" + CpuVer)); 331 } 332 333 if (IsShared) { 334 CmdArgs.push_back("-shared"); 335 // The following should be the default, but doing as hexagon-gcc does. 336 CmdArgs.push_back("-call_shared"); 337 } 338 339 if (IsStatic) 340 CmdArgs.push_back("-static"); 341 342 if (IsPIE && !IsShared) 343 CmdArgs.push_back("-pie"); 344 345 if (auto G = toolchains::HexagonToolChain::getSmallDataThreshold(Args)) { 346 CmdArgs.push_back(Args.MakeArgString("-G" + Twine(*G))); 347 UseG0 = *G == 0; 348 } 349 350 CmdArgs.push_back("-o"); 351 CmdArgs.push_back(Output.getFilename()); 352 353 if (HTC.getTriple().isMusl()) { 354 if (!Args.hasArg(options::OPT_shared, options::OPT_static)) 355 CmdArgs.push_back("-dynamic-linker=/lib/ld-musl-hexagon.so.1"); 356 357 if (!Args.hasArg(options::OPT_shared, options::OPT_nostartfiles, 358 options::OPT_nostdlib)) 359 CmdArgs.push_back(Args.MakeArgString(D.SysRoot + "/usr/lib/crt1.o")); 360 else if (Args.hasArg(options::OPT_shared) && 361 !Args.hasArg(options::OPT_nostartfiles, options::OPT_nostdlib)) 362 CmdArgs.push_back(Args.MakeArgString(D.SysRoot + "/usr/lib/crti.o")); 363 364 CmdArgs.push_back( 365 Args.MakeArgString(StringRef("-L") + D.SysRoot + "/usr/lib")); 366 Args.AddAllArgs(CmdArgs, {options::OPT_T_Group, options::OPT_s, 367 options::OPT_t, options::OPT_u_Group}); 368 AddLinkerInputs(HTC, Inputs, Args, CmdArgs, JA); 369 370 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) { 371 if (NeedsSanitizerDeps) { 372 linkSanitizerRuntimeDeps(HTC, CmdArgs); 373 374 CmdArgs.push_back("-lunwind"); 375 } 376 if (NeedsXRayDeps) 377 linkXRayRuntimeDeps(HTC, CmdArgs); 378 379 CmdArgs.push_back("-lclang_rt.builtins-hexagon"); 380 CmdArgs.push_back("-lc"); 381 } 382 if (D.CCCIsCXX()) { 383 if (HTC.ShouldLinkCXXStdlib(Args)) 384 HTC.AddCXXStdlibLibArgs(Args, CmdArgs); 385 } 386 const ToolChain::path_list &LibPaths = HTC.getFilePaths(); 387 for (const auto &LibPath : LibPaths) 388 CmdArgs.push_back(Args.MakeArgString(StringRef("-L") + LibPath)); 389 Args.ClaimAllArgs(options::OPT_L); 390 return; 391 } 392 393 //---------------------------------------------------------------------------- 394 // moslib 395 //---------------------------------------------------------------------------- 396 std::vector<std::string> OsLibs; 397 bool HasStandalone = false; 398 for (const Arg *A : Args.filtered(options::OPT_moslib_EQ)) { 399 A->claim(); 400 OsLibs.emplace_back(A->getValue()); 401 HasStandalone = HasStandalone || (OsLibs.back() == "standalone"); 402 } 403 if (OsLibs.empty()) { 404 OsLibs.push_back("standalone"); 405 HasStandalone = true; 406 } 407 408 //---------------------------------------------------------------------------- 409 // Start Files 410 //---------------------------------------------------------------------------- 411 const std::string MCpuSuffix = "/" + CpuVer.str(); 412 const std::string MCpuG0Suffix = MCpuSuffix + "/G0"; 413 const std::string RootDir = 414 HTC.getHexagonTargetDir(D.InstalledDir, D.PrefixDirs) + "/"; 415 const std::string StartSubDir = 416 "hexagon/lib" + (UseG0 ? MCpuG0Suffix : MCpuSuffix); 417 418 auto Find = [&HTC] (const std::string &RootDir, const std::string &SubDir, 419 const char *Name) -> std::string { 420 std::string RelName = SubDir + Name; 421 std::string P = HTC.GetFilePath(RelName.c_str()); 422 if (llvm::sys::fs::exists(P)) 423 return P; 424 return RootDir + RelName; 425 }; 426 427 if (IncStdLib && IncStartFiles) { 428 if (!IsShared) { 429 if (HasStandalone) { 430 std::string Crt0SA = Find(RootDir, StartSubDir, "/crt0_standalone.o"); 431 CmdArgs.push_back(Args.MakeArgString(Crt0SA)); 432 } 433 std::string Crt0 = Find(RootDir, StartSubDir, "/crt0.o"); 434 CmdArgs.push_back(Args.MakeArgString(Crt0)); 435 } 436 std::string Init = UseShared 437 ? Find(RootDir, StartSubDir + "/pic", "/initS.o") 438 : Find(RootDir, StartSubDir, "/init.o"); 439 CmdArgs.push_back(Args.MakeArgString(Init)); 440 } 441 442 //---------------------------------------------------------------------------- 443 // Library Search Paths 444 //---------------------------------------------------------------------------- 445 const ToolChain::path_list &LibPaths = HTC.getFilePaths(); 446 for (const auto &LibPath : LibPaths) 447 CmdArgs.push_back(Args.MakeArgString(StringRef("-L") + LibPath)); 448 Args.ClaimAllArgs(options::OPT_L); 449 450 //---------------------------------------------------------------------------- 451 // 452 //---------------------------------------------------------------------------- 453 Args.AddAllArgs(CmdArgs, {options::OPT_T_Group, options::OPT_s, 454 options::OPT_t, options::OPT_u_Group}); 455 456 AddLinkerInputs(HTC, Inputs, Args, CmdArgs, JA); 457 458 //---------------------------------------------------------------------------- 459 // Libraries 460 //---------------------------------------------------------------------------- 461 if (IncStdLib && IncDefLibs) { 462 if (D.CCCIsCXX()) { 463 if (HTC.ShouldLinkCXXStdlib(Args)) 464 HTC.AddCXXStdlibLibArgs(Args, CmdArgs); 465 CmdArgs.push_back("-lm"); 466 } 467 468 CmdArgs.push_back("--start-group"); 469 470 if (!IsShared) { 471 for (StringRef Lib : OsLibs) 472 CmdArgs.push_back(Args.MakeArgString("-l" + Lib)); 473 CmdArgs.push_back("-lc"); 474 } 475 CmdArgs.push_back("-lgcc"); 476 477 CmdArgs.push_back("--end-group"); 478 } 479 480 //---------------------------------------------------------------------------- 481 // End files 482 //---------------------------------------------------------------------------- 483 if (IncStdLib && IncStartFiles) { 484 std::string Fini = UseShared 485 ? Find(RootDir, StartSubDir + "/pic", "/finiS.o") 486 : Find(RootDir, StartSubDir, "/fini.o"); 487 CmdArgs.push_back(Args.MakeArgString(Fini)); 488 } 489 } 490 491 void hexagon::Linker::ConstructJob(Compilation &C, const JobAction &JA, 492 const InputInfo &Output, 493 const InputInfoList &Inputs, 494 const ArgList &Args, 495 const char *LinkingOutput) const { 496 auto &HTC = static_cast<const toolchains::HexagonToolChain&>(getToolChain()); 497 498 ArgStringList CmdArgs; 499 constructHexagonLinkArgs(C, JA, HTC, Output, Inputs, Args, CmdArgs, 500 LinkingOutput); 501 502 const char *Exec = Args.MakeArgString(HTC.GetLinkerPath()); 503 C.addCommand(std::make_unique<Command>(JA, *this, 504 ResponseFileSupport::AtFileCurCP(), 505 Exec, CmdArgs, Inputs, Output)); 506 } 507 // Hexagon tools end. 508 509 /// Hexagon Toolchain 510 511 std::string HexagonToolChain::getHexagonTargetDir( 512 const std::string &InstalledDir, 513 const SmallVectorImpl<std::string> &PrefixDirs) const { 514 std::string InstallRelDir; 515 const Driver &D = getDriver(); 516 517 // Locate the rest of the toolchain ... 518 for (auto &I : PrefixDirs) 519 if (D.getVFS().exists(I)) 520 return I; 521 522 if (getVFS().exists(InstallRelDir = InstalledDir + "/../target")) 523 return InstallRelDir; 524 525 return InstalledDir; 526 } 527 528 std::optional<unsigned> 529 HexagonToolChain::getSmallDataThreshold(const ArgList &Args) { 530 StringRef Gn = ""; 531 if (Arg *A = Args.getLastArg(options::OPT_G)) { 532 Gn = A->getValue(); 533 } else if (Args.getLastArg(options::OPT_shared, options::OPT_fpic, 534 options::OPT_fPIC)) { 535 Gn = "0"; 536 } 537 538 unsigned G; 539 if (!Gn.getAsInteger(10, G)) 540 return G; 541 542 return std::nullopt; 543 } 544 545 std::string HexagonToolChain::getCompilerRTPath() const { 546 SmallString<128> Dir(getDriver().SysRoot); 547 llvm::sys::path::append(Dir, "usr", "lib"); 548 if (!SelectedMultilibs.empty()) { 549 Dir += SelectedMultilibs.back().gccSuffix(); 550 } 551 return std::string(Dir.str()); 552 } 553 554 void HexagonToolChain::getHexagonLibraryPaths(const ArgList &Args, 555 ToolChain::path_list &LibPaths) const { 556 const Driver &D = getDriver(); 557 558 //---------------------------------------------------------------------------- 559 // -L Args 560 //---------------------------------------------------------------------------- 561 for (Arg *A : Args.filtered(options::OPT_L)) 562 llvm::append_range(LibPaths, A->getValues()); 563 564 //---------------------------------------------------------------------------- 565 // Other standard paths 566 //---------------------------------------------------------------------------- 567 std::vector<std::string> RootDirs; 568 std::copy(D.PrefixDirs.begin(), D.PrefixDirs.end(), 569 std::back_inserter(RootDirs)); 570 571 std::string TargetDir = getHexagonTargetDir(D.getInstalledDir(), 572 D.PrefixDirs); 573 if (!llvm::is_contained(RootDirs, TargetDir)) 574 RootDirs.push_back(TargetDir); 575 576 bool HasPIC = Args.hasArg(options::OPT_fpic, options::OPT_fPIC); 577 // Assume G0 with -shared. 578 bool HasG0 = Args.hasArg(options::OPT_shared); 579 if (auto G = getSmallDataThreshold(Args)) 580 HasG0 = *G == 0; 581 582 const std::string CpuVer = GetTargetCPUVersion(Args).str(); 583 for (auto &Dir : RootDirs) { 584 std::string LibDir = Dir + "/hexagon/lib"; 585 std::string LibDirCpu = LibDir + '/' + CpuVer; 586 if (HasG0) { 587 if (HasPIC) 588 LibPaths.push_back(LibDirCpu + "/G0/pic"); 589 LibPaths.push_back(LibDirCpu + "/G0"); 590 } 591 LibPaths.push_back(LibDirCpu); 592 LibPaths.push_back(LibDir); 593 } 594 } 595 596 HexagonToolChain::HexagonToolChain(const Driver &D, const llvm::Triple &Triple, 597 const llvm::opt::ArgList &Args) 598 : Linux(D, Triple, Args) { 599 const std::string TargetDir = getHexagonTargetDir(D.getInstalledDir(), 600 D.PrefixDirs); 601 602 // Note: Generic_GCC::Generic_GCC adds InstalledDir and getDriver().Dir to 603 // program paths 604 const std::string BinDir(TargetDir + "/bin"); 605 if (D.getVFS().exists(BinDir)) 606 getProgramPaths().push_back(BinDir); 607 608 ToolChain::path_list &LibPaths = getFilePaths(); 609 610 // Remove paths added by Linux toolchain. Currently Hexagon_TC really targets 611 // 'elf' OS type, so the Linux paths are not appropriate. When we actually 612 // support 'linux' we'll need to fix this up 613 LibPaths.clear(); 614 getHexagonLibraryPaths(Args, LibPaths); 615 } 616 617 HexagonToolChain::~HexagonToolChain() {} 618 619 void HexagonToolChain::AddCXXStdlibLibArgs(const ArgList &Args, 620 ArgStringList &CmdArgs) const { 621 CXXStdlibType Type = GetCXXStdlibType(Args); 622 switch (Type) { 623 case ToolChain::CST_Libcxx: 624 CmdArgs.push_back("-lc++"); 625 if (Args.hasArg(options::OPT_fexperimental_library)) 626 CmdArgs.push_back("-lc++experimental"); 627 CmdArgs.push_back("-lc++abi"); 628 CmdArgs.push_back("-lunwind"); 629 break; 630 631 case ToolChain::CST_Libstdcxx: 632 CmdArgs.push_back("-lstdc++"); 633 break; 634 } 635 } 636 637 Tool *HexagonToolChain::buildAssembler() const { 638 return new tools::hexagon::Assembler(*this); 639 } 640 641 Tool *HexagonToolChain::buildLinker() const { 642 return new tools::hexagon::Linker(*this); 643 } 644 645 unsigned HexagonToolChain::getOptimizationLevel( 646 const llvm::opt::ArgList &DriverArgs) const { 647 // Copied in large part from lib/Frontend/CompilerInvocation.cpp. 648 Arg *A = DriverArgs.getLastArg(options::OPT_O_Group); 649 if (!A) 650 return 0; 651 652 if (A->getOption().matches(options::OPT_O0)) 653 return 0; 654 if (A->getOption().matches(options::OPT_Ofast) || 655 A->getOption().matches(options::OPT_O4)) 656 return 3; 657 assert(A->getNumValues() != 0); 658 StringRef S(A->getValue()); 659 if (S == "s" || S == "z" || S.empty()) 660 return 2; 661 if (S == "g") 662 return 1; 663 664 unsigned OptLevel; 665 if (S.getAsInteger(10, OptLevel)) 666 return 0; 667 return OptLevel; 668 } 669 670 void HexagonToolChain::addClangTargetOptions(const ArgList &DriverArgs, 671 ArgStringList &CC1Args, 672 Action::OffloadKind) const { 673 674 bool UseInitArrayDefault = getTriple().isMusl(); 675 676 if (!DriverArgs.hasFlag(options::OPT_fuse_init_array, 677 options::OPT_fno_use_init_array, 678 UseInitArrayDefault)) 679 CC1Args.push_back("-fno-use-init-array"); 680 681 if (DriverArgs.hasArg(options::OPT_ffixed_r19)) { 682 CC1Args.push_back("-target-feature"); 683 CC1Args.push_back("+reserved-r19"); 684 } 685 if (isAutoHVXEnabled(DriverArgs)) { 686 CC1Args.push_back("-mllvm"); 687 CC1Args.push_back("-hexagon-autohvx"); 688 } 689 } 690 691 void HexagonToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs, 692 ArgStringList &CC1Args) const { 693 if (DriverArgs.hasArg(options::OPT_nostdinc)) 694 return; 695 696 const bool IsELF = !getTriple().isMusl() && !getTriple().isOSLinux(); 697 const bool IsLinuxMusl = getTriple().isMusl() && getTriple().isOSLinux(); 698 699 const Driver &D = getDriver(); 700 SmallString<128> ResourceDirInclude(D.ResourceDir); 701 if (!IsELF) { 702 llvm::sys::path::append(ResourceDirInclude, "include"); 703 if (!DriverArgs.hasArg(options::OPT_nobuiltininc) && 704 (!IsLinuxMusl || DriverArgs.hasArg(options::OPT_nostdlibinc))) 705 addSystemInclude(DriverArgs, CC1Args, ResourceDirInclude); 706 } 707 if (DriverArgs.hasArg(options::OPT_nostdlibinc)) 708 return; 709 710 const bool HasSysRoot = !D.SysRoot.empty(); 711 if (HasSysRoot) { 712 SmallString<128> P(D.SysRoot); 713 if (IsLinuxMusl) 714 llvm::sys::path::append(P, "usr/include"); 715 else 716 llvm::sys::path::append(P, "include"); 717 718 addExternCSystemInclude(DriverArgs, CC1Args, P.str()); 719 // LOCAL_INCLUDE_DIR 720 addSystemInclude(DriverArgs, CC1Args, P + "/usr/local/include"); 721 // TOOL_INCLUDE_DIR 722 AddMultilibIncludeArgs(DriverArgs, CC1Args); 723 } 724 725 if (!DriverArgs.hasArg(options::OPT_nobuiltininc) && IsLinuxMusl) 726 addSystemInclude(DriverArgs, CC1Args, ResourceDirInclude); 727 728 if (HasSysRoot) 729 return; 730 std::string TargetDir = getHexagonTargetDir(D.getInstalledDir(), 731 D.PrefixDirs); 732 addExternCSystemInclude(DriverArgs, CC1Args, TargetDir + "/hexagon/include"); 733 } 734 735 void HexagonToolChain::addLibCxxIncludePaths( 736 const llvm::opt::ArgList &DriverArgs, 737 llvm::opt::ArgStringList &CC1Args) const { 738 const Driver &D = getDriver(); 739 if (!D.SysRoot.empty() && getTriple().isMusl()) 740 addLibStdCXXIncludePaths(D.SysRoot + "/usr/include/c++/v1", "", "", 741 DriverArgs, CC1Args); 742 else if (getTriple().isMusl()) 743 addLibStdCXXIncludePaths("/usr/include/c++/v1", "", "", DriverArgs, 744 CC1Args); 745 else { 746 std::string TargetDir = getHexagonTargetDir(D.InstalledDir, D.PrefixDirs); 747 addLibStdCXXIncludePaths(TargetDir + "/hexagon/include/c++/v1", "", "", 748 DriverArgs, CC1Args); 749 } 750 } 751 void HexagonToolChain::addLibStdCxxIncludePaths( 752 const llvm::opt::ArgList &DriverArgs, 753 llvm::opt::ArgStringList &CC1Args) const { 754 const Driver &D = getDriver(); 755 std::string TargetDir = getHexagonTargetDir(D.InstalledDir, D.PrefixDirs); 756 addLibStdCXXIncludePaths(TargetDir + "/hexagon/include/c++", "", "", 757 DriverArgs, CC1Args); 758 } 759 760 ToolChain::CXXStdlibType 761 HexagonToolChain::GetCXXStdlibType(const ArgList &Args) const { 762 Arg *A = Args.getLastArg(options::OPT_stdlib_EQ); 763 if (!A) { 764 if (getTriple().isMusl()) 765 return ToolChain::CST_Libcxx; 766 else 767 return ToolChain::CST_Libstdcxx; 768 } 769 StringRef Value = A->getValue(); 770 if (Value != "libstdc++" && Value != "libc++") 771 getDriver().Diag(diag::err_drv_invalid_stdlib_name) << A->getAsString(Args); 772 773 if (Value == "libstdc++") 774 return ToolChain::CST_Libstdcxx; 775 else if (Value == "libc++") 776 return ToolChain::CST_Libcxx; 777 else 778 return ToolChain::CST_Libstdcxx; 779 } 780 781 bool HexagonToolChain::isAutoHVXEnabled(const llvm::opt::ArgList &Args) { 782 if (Arg *A = Args.getLastArg(options::OPT_fvectorize, 783 options::OPT_fno_vectorize)) 784 return A->getOption().matches(options::OPT_fvectorize); 785 return false; 786 } 787 788 // 789 // Returns the default CPU for Hexagon. This is the default compilation target 790 // if no Hexagon processor is selected at the command-line. 791 // 792 StringRef HexagonToolChain::GetDefaultCPU() { 793 return "hexagonv60"; 794 } 795 796 StringRef HexagonToolChain::GetTargetCPUVersion(const ArgList &Args) { 797 Arg *CpuArg = nullptr; 798 if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) 799 CpuArg = A; 800 801 StringRef CPU = CpuArg ? CpuArg->getValue() : GetDefaultCPU(); 802 if (CPU.startswith("hexagon")) 803 return CPU.substr(sizeof("hexagon") - 1); 804 return CPU; 805 } 806