Bug Summary

File:clang/lib/Driver/Driver.cpp
Warning:line 3352, column 5
Undefined or garbage value returned to caller

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name Driver.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 -fhalf-no-semantic-interposition -mframe-pointer=none -relaxed-aliasing -fmath-errno -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -tune-cpu generic -fno-split-dwarf-inlining -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-12/lib/clang/12.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/build-llvm/tools/clang/lib/Driver -I /build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver -I /build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include -I /build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/build-llvm/include -I /build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-12/lib/clang/12.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/build-llvm/tools/clang/lib/Driver -fdebug-prefix-map=/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1=. -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -o /tmp/scan-build-2021-01-24-223304-31662-1 -x c++ /build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp

/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp

1//===--- Driver.cpp - Clang GCC Compatible Driver -------------------------===//
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 "clang/Driver/Driver.h"
10#include "InputInfo.h"
11#include "ToolChains/AIX.h"
12#include "ToolChains/AMDGPU.h"
13#include "ToolChains/AVR.h"
14#include "ToolChains/Ananas.h"
15#include "ToolChains/BareMetal.h"
16#include "ToolChains/Clang.h"
17#include "ToolChains/CloudABI.h"
18#include "ToolChains/Contiki.h"
19#include "ToolChains/CrossWindows.h"
20#include "ToolChains/Cuda.h"
21#include "ToolChains/Darwin.h"
22#include "ToolChains/DragonFly.h"
23#include "ToolChains/FreeBSD.h"
24#include "ToolChains/Fuchsia.h"
25#include "ToolChains/Gnu.h"
26#include "ToolChains/HIP.h"
27#include "ToolChains/Haiku.h"
28#include "ToolChains/Hexagon.h"
29#include "ToolChains/Hurd.h"
30#include "ToolChains/Lanai.h"
31#include "ToolChains/Linux.h"
32#include "ToolChains/MSP430.h"
33#include "ToolChains/MSVC.h"
34#include "ToolChains/MinGW.h"
35#include "ToolChains/Minix.h"
36#include "ToolChains/MipsLinux.h"
37#include "ToolChains/Myriad.h"
38#include "ToolChains/NaCl.h"
39#include "ToolChains/NetBSD.h"
40#include "ToolChains/OpenBSD.h"
41#include "ToolChains/PPCLinux.h"
42#include "ToolChains/PS4CPU.h"
43#include "ToolChains/RISCVToolchain.h"
44#include "ToolChains/Solaris.h"
45#include "ToolChains/TCE.h"
46#include "ToolChains/VEToolchain.h"
47#include "ToolChains/WebAssembly.h"
48#include "ToolChains/XCore.h"
49#include "ToolChains/ZOS.h"
50#include "clang/Basic/TargetID.h"
51#include "clang/Basic/Version.h"
52#include "clang/Config/config.h"
53#include "clang/Driver/Action.h"
54#include "clang/Driver/Compilation.h"
55#include "clang/Driver/DriverDiagnostic.h"
56#include "clang/Driver/Job.h"
57#include "clang/Driver/Options.h"
58#include "clang/Driver/SanitizerArgs.h"
59#include "clang/Driver/Tool.h"
60#include "clang/Driver/ToolChain.h"
61#include "llvm/ADT/ArrayRef.h"
62#include "llvm/ADT/STLExtras.h"
63#include "llvm/ADT/SmallSet.h"
64#include "llvm/ADT/StringExtras.h"
65#include "llvm/ADT/StringSet.h"
66#include "llvm/ADT/StringSwitch.h"
67#include "llvm/Config/llvm-config.h"
68#include "llvm/Option/Arg.h"
69#include "llvm/Option/ArgList.h"
70#include "llvm/Option/OptSpecifier.h"
71#include "llvm/Option/OptTable.h"
72#include "llvm/Option/Option.h"
73#include "llvm/Support/CommandLine.h"
74#include "llvm/Support/ErrorHandling.h"
75#include "llvm/Support/ExitCodes.h"
76#include "llvm/Support/FileSystem.h"
77#include "llvm/Support/FormatVariadic.h"
78#include "llvm/Support/Host.h"
79#include "llvm/Support/Path.h"
80#include "llvm/Support/PrettyStackTrace.h"
81#include "llvm/Support/Process.h"
82#include "llvm/Support/Program.h"
83#include "llvm/Support/StringSaver.h"
84#include "llvm/Support/TargetRegistry.h"
85#include "llvm/Support/VirtualFileSystem.h"
86#include "llvm/Support/raw_ostream.h"
87#include <map>
88#include <memory>
89#include <utility>
90#if LLVM_ON_UNIX1
91#include <unistd.h> // getpid
92#endif
93
94using namespace clang::driver;
95using namespace clang;
96using namespace llvm::opt;
97
98static llvm::Triple getHIPOffloadTargetTriple() {
99 static const llvm::Triple T("amdgcn-amd-amdhsa");
100 return T;
101}
102
103// static
104std::string Driver::GetResourcesPath(StringRef BinaryPath,
105 StringRef CustomResourceDir) {
106 // Since the resource directory is embedded in the module hash, it's important
107 // that all places that need it call this function, so that they get the
108 // exact same string ("a/../b/" and "b/" get different hashes, for example).
109
110 // Dir is bin/ or lib/, depending on where BinaryPath is.
111 std::string Dir = std::string(llvm::sys::path::parent_path(BinaryPath));
112
113 SmallString<128> P(Dir);
114 if (CustomResourceDir != "") {
115 llvm::sys::path::append(P, CustomResourceDir);
116 } else {
117 // On Windows, libclang.dll is in bin/.
118 // On non-Windows, libclang.so/.dylib is in lib/.
119 // With a static-library build of libclang, LibClangPath will contain the
120 // path of the embedding binary, which for LLVM binaries will be in bin/.
121 // ../lib gets us to lib/ in both cases.
122 P = llvm::sys::path::parent_path(Dir);
123 llvm::sys::path::append(P, Twine("lib") + CLANG_LIBDIR_SUFFIX"", "clang",
124 CLANG_VERSION_STRING"12.0.0");
125 }
126
127 return std::string(P.str());
128}
129
130Driver::Driver(StringRef ClangExecutable, StringRef TargetTriple,
131 DiagnosticsEngine &Diags, std::string Title,
132 IntrusiveRefCntPtr<llvm::vfs::FileSystem> VFS)
133 : Diags(Diags), VFS(std::move(VFS)), Mode(GCCMode),
134 SaveTemps(SaveTempsNone), BitcodeEmbed(EmbedNone), LTOMode(LTOK_None),
135 ClangExecutable(ClangExecutable), SysRoot(DEFAULT_SYSROOT""),
136 DriverTitle(Title), CCPrintOptionsFilename(nullptr),
137 CCPrintHeadersFilename(nullptr), CCLogDiagnosticsFilename(nullptr),
138 CCCPrintBindings(false), CCPrintOptions(false), CCPrintHeaders(false),
139 CCLogDiagnostics(false), CCGenDiagnostics(false),
140 TargetTriple(TargetTriple), CCCGenericGCCName(""), Saver(Alloc),
141 CheckInputsExist(true), GenReproducer(false),
142 SuppressMissingInputWarning(false) {
143 // Provide a sane fallback if no VFS is specified.
144 if (!this->VFS)
145 this->VFS = llvm::vfs::getRealFileSystem();
146
147 Name = std::string(llvm::sys::path::filename(ClangExecutable));
148 Dir = std::string(llvm::sys::path::parent_path(ClangExecutable));
149 InstalledDir = Dir; // Provide a sensible default installed dir.
150
151 if ((!SysRoot.empty()) && llvm::sys::path::is_relative(SysRoot)) {
152 // Prepend InstalledDir if SysRoot is relative
153 SmallString<128> P(InstalledDir);
154 llvm::sys::path::append(P, SysRoot);
155 SysRoot = std::string(P);
156 }
157
158#if defined(CLANG_CONFIG_FILE_SYSTEM_DIR)
159 SystemConfigDir = CLANG_CONFIG_FILE_SYSTEM_DIR;
160#endif
161#if defined(CLANG_CONFIG_FILE_USER_DIR)
162 UserConfigDir = CLANG_CONFIG_FILE_USER_DIR;
163#endif
164
165 // Compute the path to the resource directory.
166 ResourceDir = GetResourcesPath(ClangExecutable, CLANG_RESOURCE_DIR"");
167}
168
169void Driver::ParseDriverMode(StringRef ProgramName,
170 ArrayRef<const char *> Args) {
171 if (ClangNameParts.isEmpty())
172 ClangNameParts = ToolChain::getTargetAndModeFromProgramName(ProgramName);
173 setDriverModeFromOption(ClangNameParts.DriverMode);
174
175 for (const char *ArgPtr : Args) {
176 // Ignore nullptrs, they are the response file's EOL markers.
177 if (ArgPtr == nullptr)
178 continue;
179 const StringRef Arg = ArgPtr;
180 setDriverModeFromOption(Arg);
181 }
182}
183
184void Driver::setDriverModeFromOption(StringRef Opt) {
185 const std::string OptName =
186 getOpts().getOption(options::OPT_driver_mode).getPrefixedName();
187 if (!Opt.startswith(OptName))
188 return;
189 StringRef Value = Opt.drop_front(OptName.size());
190
191 if (auto M = llvm::StringSwitch<llvm::Optional<DriverMode>>(Value)
192 .Case("gcc", GCCMode)
193 .Case("g++", GXXMode)
194 .Case("cpp", CPPMode)
195 .Case("cl", CLMode)
196 .Case("flang", FlangMode)
197 .Default(None))
198 Mode = *M;
199 else
200 Diag(diag::err_drv_unsupported_option_argument) << OptName << Value;
201}
202
203InputArgList Driver::ParseArgStrings(ArrayRef<const char *> ArgStrings,
204 bool IsClCompatMode,
205 bool &ContainsError) {
206 llvm::PrettyStackTraceString CrashInfo("Command line argument parsing");
207 ContainsError = false;
208
209 unsigned IncludedFlagsBitmask;
210 unsigned ExcludedFlagsBitmask;
211 std::tie(IncludedFlagsBitmask, ExcludedFlagsBitmask) =
212 getIncludeExcludeOptionFlagMasks(IsClCompatMode);
213
214 // Make sure that Flang-only options don't pollute the Clang output
215 // TODO: Make sure that Clang-only options don't pollute Flang output
216 if (!IsFlangMode())
217 ExcludedFlagsBitmask |= options::FlangOnlyOption;
218
219 unsigned MissingArgIndex, MissingArgCount;
220 InputArgList Args =
221 getOpts().ParseArgs(ArgStrings, MissingArgIndex, MissingArgCount,
222 IncludedFlagsBitmask, ExcludedFlagsBitmask);
223
224 // Check for missing argument error.
225 if (MissingArgCount) {
226 Diag(diag::err_drv_missing_argument)
227 << Args.getArgString(MissingArgIndex) << MissingArgCount;
228 ContainsError |=
229 Diags.getDiagnosticLevel(diag::err_drv_missing_argument,
230 SourceLocation()) > DiagnosticsEngine::Warning;
231 }
232
233 // Check for unsupported options.
234 for (const Arg *A : Args) {
235 if (A->getOption().hasFlag(options::Unsupported)) {
236 unsigned DiagID;
237 auto ArgString = A->getAsString(Args);
238 std::string Nearest;
239 if (getOpts().findNearest(
240 ArgString, Nearest, IncludedFlagsBitmask,
241 ExcludedFlagsBitmask | options::Unsupported) > 1) {
242 DiagID = diag::err_drv_unsupported_opt;
243 Diag(DiagID) << ArgString;
244 } else {
245 DiagID = diag::err_drv_unsupported_opt_with_suggestion;
246 Diag(DiagID) << ArgString << Nearest;
247 }
248 ContainsError |= Diags.getDiagnosticLevel(DiagID, SourceLocation()) >
249 DiagnosticsEngine::Warning;
250 continue;
251 }
252
253 // Warn about -mcpu= without an argument.
254 if (A->getOption().matches(options::OPT_mcpu_EQ) && A->containsValue("")) {
255 Diag(diag::warn_drv_empty_joined_argument) << A->getAsString(Args);
256 ContainsError |= Diags.getDiagnosticLevel(
257 diag::warn_drv_empty_joined_argument,
258 SourceLocation()) > DiagnosticsEngine::Warning;
259 }
260 }
261
262 for (const Arg *A : Args.filtered(options::OPT_UNKNOWN)) {
263 unsigned DiagID;
264 auto ArgString = A->getAsString(Args);
265 std::string Nearest;
266 if (getOpts().findNearest(
267 ArgString, Nearest, IncludedFlagsBitmask, ExcludedFlagsBitmask) > 1) {
268 DiagID = IsCLMode() ? diag::warn_drv_unknown_argument_clang_cl
269 : diag::err_drv_unknown_argument;
270 Diags.Report(DiagID) << ArgString;
271 } else {
272 DiagID = IsCLMode()
273 ? diag::warn_drv_unknown_argument_clang_cl_with_suggestion
274 : diag::err_drv_unknown_argument_with_suggestion;
275 Diags.Report(DiagID) << ArgString << Nearest;
276 }
277 ContainsError |= Diags.getDiagnosticLevel(DiagID, SourceLocation()) >
278 DiagnosticsEngine::Warning;
279 }
280
281 return Args;
282}
283
284// Determine which compilation mode we are in. We look for options which
285// affect the phase, starting with the earliest phases, and record which
286// option we used to determine the final phase.
287phases::ID Driver::getFinalPhase(const DerivedArgList &DAL,
288 Arg **FinalPhaseArg) const {
289 Arg *PhaseArg = nullptr;
290 phases::ID FinalPhase;
291
292 // -{E,EP,P,M,MM} only run the preprocessor.
293 if (CCCIsCPP() || (PhaseArg = DAL.getLastArg(options::OPT_E)) ||
294 (PhaseArg = DAL.getLastArg(options::OPT__SLASH_EP)) ||
295 (PhaseArg = DAL.getLastArg(options::OPT_M, options::OPT_MM)) ||
296 (PhaseArg = DAL.getLastArg(options::OPT__SLASH_P))) {
297 FinalPhase = phases::Preprocess;
298
299 // --precompile only runs up to precompilation.
300 } else if ((PhaseArg = DAL.getLastArg(options::OPT__precompile))) {
301 FinalPhase = phases::Precompile;
302
303 // -{fsyntax-only,-analyze,emit-ast} only run up to the compiler.
304 } else if ((PhaseArg = DAL.getLastArg(options::OPT_fsyntax_only)) ||
305 (PhaseArg = DAL.getLastArg(options::OPT_print_supported_cpus)) ||
306 (PhaseArg = DAL.getLastArg(options::OPT_module_file_info)) ||
307 (PhaseArg = DAL.getLastArg(options::OPT_verify_pch)) ||
308 (PhaseArg = DAL.getLastArg(options::OPT_rewrite_objc)) ||
309 (PhaseArg = DAL.getLastArg(options::OPT_rewrite_legacy_objc)) ||
310 (PhaseArg = DAL.getLastArg(options::OPT__migrate)) ||
311 (PhaseArg = DAL.getLastArg(options::OPT__analyze)) ||
312 (PhaseArg = DAL.getLastArg(options::OPT_emit_ast))) {
313 FinalPhase = phases::Compile;
314
315 // -S only runs up to the backend.
316 } else if ((PhaseArg = DAL.getLastArg(options::OPT_S))) {
317 FinalPhase = phases::Backend;
318
319 // -c compilation only runs up to the assembler.
320 } else if ((PhaseArg = DAL.getLastArg(options::OPT_c))) {
321 FinalPhase = phases::Assemble;
322
323 // Otherwise do everything.
324 } else
325 FinalPhase = phases::Link;
326
327 if (FinalPhaseArg)
328 *FinalPhaseArg = PhaseArg;
329
330 return FinalPhase;
331}
332
333static Arg *MakeInputArg(DerivedArgList &Args, const OptTable &Opts,
334 StringRef Value, bool Claim = true) {
335 Arg *A = new Arg(Opts.getOption(options::OPT_INPUT), Value,
336 Args.getBaseArgs().MakeIndex(Value), Value.data());
337 Args.AddSynthesizedArg(A);
338 if (Claim)
339 A->claim();
340 return A;
341}
342
343DerivedArgList *Driver::TranslateInputArgs(const InputArgList &Args) const {
344 const llvm::opt::OptTable &Opts = getOpts();
345 DerivedArgList *DAL = new DerivedArgList(Args);
346
347 bool HasNostdlib = Args.hasArg(options::OPT_nostdlib);
348 bool HasNostdlibxx = Args.hasArg(options::OPT_nostdlibxx);
349 bool HasNodefaultlib = Args.hasArg(options::OPT_nodefaultlibs);
350 for (Arg *A : Args) {
351 // Unfortunately, we have to parse some forwarding options (-Xassembler,
352 // -Xlinker, -Xpreprocessor) because we either integrate their functionality
353 // (assembler and preprocessor), or bypass a previous driver ('collect2').
354
355 // Rewrite linker options, to replace --no-demangle with a custom internal
356 // option.
357 if ((A->getOption().matches(options::OPT_Wl_COMMA) ||
358 A->getOption().matches(options::OPT_Xlinker)) &&
359 A->containsValue("--no-demangle")) {
360 // Add the rewritten no-demangle argument.
361 DAL->AddFlagArg(A, Opts.getOption(options::OPT_Z_Xlinker__no_demangle));
362
363 // Add the remaining values as Xlinker arguments.
364 for (StringRef Val : A->getValues())
365 if (Val != "--no-demangle")
366 DAL->AddSeparateArg(A, Opts.getOption(options::OPT_Xlinker), Val);
367
368 continue;
369 }
370
371 // Rewrite preprocessor options, to replace -Wp,-MD,FOO which is used by
372 // some build systems. We don't try to be complete here because we don't
373 // care to encourage this usage model.
374 if (A->getOption().matches(options::OPT_Wp_COMMA) &&
375 (A->getValue(0) == StringRef("-MD") ||
376 A->getValue(0) == StringRef("-MMD"))) {
377 // Rewrite to -MD/-MMD along with -MF.
378 if (A->getValue(0) == StringRef("-MD"))
379 DAL->AddFlagArg(A, Opts.getOption(options::OPT_MD));
380 else
381 DAL->AddFlagArg(A, Opts.getOption(options::OPT_MMD));
382 if (A->getNumValues() == 2)
383 DAL->AddSeparateArg(A, Opts.getOption(options::OPT_MF), A->getValue(1));
384 continue;
385 }
386
387 // Rewrite reserved library names.
388 if (A->getOption().matches(options::OPT_l)) {
389 StringRef Value = A->getValue();
390
391 // Rewrite unless -nostdlib is present.
392 if (!HasNostdlib && !HasNodefaultlib && !HasNostdlibxx &&
393 Value == "stdc++") {
394 DAL->AddFlagArg(A, Opts.getOption(options::OPT_Z_reserved_lib_stdcxx));
395 continue;
396 }
397
398 // Rewrite unconditionally.
399 if (Value == "cc_kext") {
400 DAL->AddFlagArg(A, Opts.getOption(options::OPT_Z_reserved_lib_cckext));
401 continue;
402 }
403 }
404
405 // Pick up inputs via the -- option.
406 if (A->getOption().matches(options::OPT__DASH_DASH)) {
407 A->claim();
408 for (StringRef Val : A->getValues())
409 DAL->append(MakeInputArg(*DAL, Opts, Val, false));
410 continue;
411 }
412
413 DAL->append(A);
414 }
415
416 // Enforce -static if -miamcu is present.
417 if (Args.hasFlag(options::OPT_miamcu, options::OPT_mno_iamcu, false))
418 DAL->AddFlagArg(0, Opts.getOption(options::OPT_static));
419
420// Add a default value of -mlinker-version=, if one was given and the user
421// didn't specify one.
422#if defined(HOST_LINK_VERSION)
423 if (!Args.hasArg(options::OPT_mlinker_version_EQ) &&
424 strlen(HOST_LINK_VERSION) > 0) {
425 DAL->AddJoinedArg(0, Opts.getOption(options::OPT_mlinker_version_EQ),
426 HOST_LINK_VERSION);
427 DAL->getLastArg(options::OPT_mlinker_version_EQ)->claim();
428 }
429#endif
430
431 return DAL;
432}
433
434/// Compute target triple from args.
435///
436/// This routine provides the logic to compute a target triple from various
437/// args passed to the driver and the default triple string.
438static llvm::Triple computeTargetTriple(const Driver &D,
439 StringRef TargetTriple,
440 const ArgList &Args,
441 StringRef DarwinArchName = "") {
442 // FIXME: Already done in Compilation *Driver::BuildCompilation
443 if (const Arg *A = Args.getLastArg(options::OPT_target))
444 TargetTriple = A->getValue();
445
446 llvm::Triple Target(llvm::Triple::normalize(TargetTriple));
447
448 // GNU/Hurd's triples should have been -hurd-gnu*, but were historically made
449 // -gnu* only, and we can not change this, so we have to detect that case as
450 // being the Hurd OS.
451 if (TargetTriple.find("-unknown-gnu") != StringRef::npos ||
452 TargetTriple.find("-pc-gnu") != StringRef::npos)
453 Target.setOSName("hurd");
454
455 // Handle Apple-specific options available here.
456 if (Target.isOSBinFormatMachO()) {
457 // If an explicit Darwin arch name is given, that trumps all.
458 if (!DarwinArchName.empty()) {
459 tools::darwin::setTripleTypeForMachOArchName(Target, DarwinArchName);
460 return Target;
461 }
462
463 // Handle the Darwin '-arch' flag.
464 if (Arg *A = Args.getLastArg(options::OPT_arch)) {
465 StringRef ArchName = A->getValue();
466 tools::darwin::setTripleTypeForMachOArchName(Target, ArchName);
467 }
468 }
469
470 // Handle pseudo-target flags '-mlittle-endian'/'-EL' and
471 // '-mbig-endian'/'-EB'.
472 if (Arg *A = Args.getLastArg(options::OPT_mlittle_endian,
473 options::OPT_mbig_endian)) {
474 if (A->getOption().matches(options::OPT_mlittle_endian)) {
475 llvm::Triple LE = Target.getLittleEndianArchVariant();
476 if (LE.getArch() != llvm::Triple::UnknownArch)
477 Target = std::move(LE);
478 } else {
479 llvm::Triple BE = Target.getBigEndianArchVariant();
480 if (BE.getArch() != llvm::Triple::UnknownArch)
481 Target = std::move(BE);
482 }
483 }
484
485 // Skip further flag support on OSes which don't support '-m32' or '-m64'.
486 if (Target.getArch() == llvm::Triple::tce ||
487 Target.getOS() == llvm::Triple::Minix)
488 return Target;
489
490 // On AIX, the env OBJECT_MODE may affect the resulting arch variant.
491 if (Target.isOSAIX()) {
492 if (Optional<std::string> ObjectModeValue =
493 llvm::sys::Process::GetEnv("OBJECT_MODE")) {
494 StringRef ObjectMode = *ObjectModeValue;
495 llvm::Triple::ArchType AT = llvm::Triple::UnknownArch;
496
497 if (ObjectMode.equals("64")) {
498 AT = Target.get64BitArchVariant().getArch();
499 } else if (ObjectMode.equals("32")) {
500 AT = Target.get32BitArchVariant().getArch();
501 } else {
502 D.Diag(diag::err_drv_invalid_object_mode) << ObjectMode;
503 }
504
505 if (AT != llvm::Triple::UnknownArch && AT != Target.getArch())
506 Target.setArch(AT);
507 }
508 }
509
510 // Handle pseudo-target flags '-m64', '-mx32', '-m32' and '-m16'.
511 Arg *A = Args.getLastArg(options::OPT_m64, options::OPT_mx32,
512 options::OPT_m32, options::OPT_m16);
513 if (A) {
514 llvm::Triple::ArchType AT = llvm::Triple::UnknownArch;
515
516 if (A->getOption().matches(options::OPT_m64)) {
517 AT = Target.get64BitArchVariant().getArch();
518 if (Target.getEnvironment() == llvm::Triple::GNUX32)
519 Target.setEnvironment(llvm::Triple::GNU);
520 } else if (A->getOption().matches(options::OPT_mx32) &&
521 Target.get64BitArchVariant().getArch() == llvm::Triple::x86_64) {
522 AT = llvm::Triple::x86_64;
523 Target.setEnvironment(llvm::Triple::GNUX32);
524 } else if (A->getOption().matches(options::OPT_m32)) {
525 AT = Target.get32BitArchVariant().getArch();
526 if (Target.getEnvironment() == llvm::Triple::GNUX32)
527 Target.setEnvironment(llvm::Triple::GNU);
528 } else if (A->getOption().matches(options::OPT_m16) &&
529 Target.get32BitArchVariant().getArch() == llvm::Triple::x86) {
530 AT = llvm::Triple::x86;
531 Target.setEnvironment(llvm::Triple::CODE16);
532 }
533
534 if (AT != llvm::Triple::UnknownArch && AT != Target.getArch())
535 Target.setArch(AT);
536 }
537
538 // Handle -miamcu flag.
539 if (Args.hasFlag(options::OPT_miamcu, options::OPT_mno_iamcu, false)) {
540 if (Target.get32BitArchVariant().getArch() != llvm::Triple::x86)
541 D.Diag(diag::err_drv_unsupported_opt_for_target) << "-miamcu"
542 << Target.str();
543
544 if (A && !A->getOption().matches(options::OPT_m32))
545 D.Diag(diag::err_drv_argument_not_allowed_with)
546 << "-miamcu" << A->getBaseArg().getAsString(Args);
547
548 Target.setArch(llvm::Triple::x86);
549 Target.setArchName("i586");
550 Target.setEnvironment(llvm::Triple::UnknownEnvironment);
551 Target.setEnvironmentName("");
552 Target.setOS(llvm::Triple::ELFIAMCU);
553 Target.setVendor(llvm::Triple::UnknownVendor);
554 Target.setVendorName("intel");
555 }
556
557 // If target is MIPS adjust the target triple
558 // accordingly to provided ABI name.
559 A = Args.getLastArg(options::OPT_mabi_EQ);
560 if (A && Target.isMIPS()) {
561 StringRef ABIName = A->getValue();
562 if (ABIName == "32") {
563 Target = Target.get32BitArchVariant();
564 if (Target.getEnvironment() == llvm::Triple::GNUABI64 ||
565 Target.getEnvironment() == llvm::Triple::GNUABIN32)
566 Target.setEnvironment(llvm::Triple::GNU);
567 } else if (ABIName == "n32") {
568 Target = Target.get64BitArchVariant();
569 if (Target.getEnvironment() == llvm::Triple::GNU ||
570 Target.getEnvironment() == llvm::Triple::GNUABI64)
571 Target.setEnvironment(llvm::Triple::GNUABIN32);
572 } else if (ABIName == "64") {
573 Target = Target.get64BitArchVariant();
574 if (Target.getEnvironment() == llvm::Triple::GNU ||
575 Target.getEnvironment() == llvm::Triple::GNUABIN32)
576 Target.setEnvironment(llvm::Triple::GNUABI64);
577 }
578 }
579
580 // If target is RISC-V adjust the target triple according to
581 // provided architecture name
582 A = Args.getLastArg(options::OPT_march_EQ);
583 if (A && Target.isRISCV()) {
584 StringRef ArchName = A->getValue();
585 if (ArchName.startswith_lower("rv32"))
586 Target.setArch(llvm::Triple::riscv32);
587 else if (ArchName.startswith_lower("rv64"))
588 Target.setArch(llvm::Triple::riscv64);
589 }
590
591 return Target;
592}
593
594// Parse the LTO options and record the type of LTO compilation
595// based on which -f(no-)?lto(=.*)? option occurs last.
596void Driver::setLTOMode(const llvm::opt::ArgList &Args) {
597 LTOMode = LTOK_None;
598 if (!Args.hasFlag(options::OPT_flto, options::OPT_flto_EQ,
599 options::OPT_fno_lto, false))
600 return;
601
602 StringRef LTOName("full");
603
604 const Arg *A = Args.getLastArg(options::OPT_flto_EQ);
605 if (A)
606 LTOName = A->getValue();
607
608 LTOMode = llvm::StringSwitch<LTOKind>(LTOName)
609 .Case("full", LTOK_Full)
610 .Case("thin", LTOK_Thin)
611 .Default(LTOK_Unknown);
612
613 if (LTOMode == LTOK_Unknown) {
614 assert(A)((A) ? static_cast<void> (0) : __assert_fail ("A", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 614, __PRETTY_FUNCTION__))
;
615 Diag(diag::err_drv_unsupported_option_argument) << A->getOption().getName()
616 << A->getValue();
617 }
618}
619
620/// Compute the desired OpenMP runtime from the flags provided.
621Driver::OpenMPRuntimeKind Driver::getOpenMPRuntime(const ArgList &Args) const {
622 StringRef RuntimeName(CLANG_DEFAULT_OPENMP_RUNTIME"libomp");
623
624 const Arg *A = Args.getLastArg(options::OPT_fopenmp_EQ);
625 if (A)
626 RuntimeName = A->getValue();
627
628 auto RT = llvm::StringSwitch<OpenMPRuntimeKind>(RuntimeName)
629 .Case("libomp", OMPRT_OMP)
630 .Case("libgomp", OMPRT_GOMP)
631 .Case("libiomp5", OMPRT_IOMP5)
632 .Default(OMPRT_Unknown);
633
634 if (RT == OMPRT_Unknown) {
635 if (A)
636 Diag(diag::err_drv_unsupported_option_argument)
637 << A->getOption().getName() << A->getValue();
638 else
639 // FIXME: We could use a nicer diagnostic here.
640 Diag(diag::err_drv_unsupported_opt) << "-fopenmp";
641 }
642
643 return RT;
644}
645
646void Driver::CreateOffloadingDeviceToolChains(Compilation &C,
647 InputList &Inputs) {
648
649 //
650 // CUDA/HIP
651 //
652 // We need to generate a CUDA/HIP toolchain if any of the inputs has a CUDA
653 // or HIP type. However, mixed CUDA/HIP compilation is not supported.
654 bool IsCuda =
655 llvm::any_of(Inputs, [](std::pair<types::ID, const llvm::opt::Arg *> &I) {
656 return types::isCuda(I.first);
657 });
658 bool IsHIP =
659 llvm::any_of(Inputs,
660 [](std::pair<types::ID, const llvm::opt::Arg *> &I) {
661 return types::isHIP(I.first);
662 }) ||
663 C.getInputArgs().hasArg(options::OPT_hip_link);
664 if (IsCuda && IsHIP) {
665 Diag(clang::diag::err_drv_mix_cuda_hip);
666 return;
667 }
668 if (IsCuda) {
669 const ToolChain *HostTC = C.getSingleOffloadToolChain<Action::OFK_Host>();
670 const llvm::Triple &HostTriple = HostTC->getTriple();
671 StringRef DeviceTripleStr;
672 auto OFK = Action::OFK_Cuda;
673 DeviceTripleStr =
674 HostTriple.isArch64Bit() ? "nvptx64-nvidia-cuda" : "nvptx-nvidia-cuda";
675 llvm::Triple CudaTriple(DeviceTripleStr);
676 // Use the CUDA and host triples as the key into the ToolChains map,
677 // because the device toolchain we create depends on both.
678 auto &CudaTC = ToolChains[CudaTriple.str() + "/" + HostTriple.str()];
679 if (!CudaTC) {
680 CudaTC = std::make_unique<toolchains::CudaToolChain>(
681 *this, CudaTriple, *HostTC, C.getInputArgs(), OFK);
682 }
683 C.addOffloadDeviceToolChain(CudaTC.get(), OFK);
684 } else if (IsHIP) {
685 const ToolChain *HostTC = C.getSingleOffloadToolChain<Action::OFK_Host>();
686 const llvm::Triple &HostTriple = HostTC->getTriple();
687 auto OFK = Action::OFK_HIP;
688 llvm::Triple HIPTriple = getHIPOffloadTargetTriple();
689 // Use the HIP and host triples as the key into the ToolChains map,
690 // because the device toolchain we create depends on both.
691 auto &HIPTC = ToolChains[HIPTriple.str() + "/" + HostTriple.str()];
692 if (!HIPTC) {
693 HIPTC = std::make_unique<toolchains::HIPToolChain>(
694 *this, HIPTriple, *HostTC, C.getInputArgs());
695 }
696 C.addOffloadDeviceToolChain(HIPTC.get(), OFK);
697 }
698
699 //
700 // OpenMP
701 //
702 // We need to generate an OpenMP toolchain if the user specified targets with
703 // the -fopenmp-targets option.
704 if (Arg *OpenMPTargets =
705 C.getInputArgs().getLastArg(options::OPT_fopenmp_targets_EQ)) {
706 if (OpenMPTargets->getNumValues()) {
707 // We expect that -fopenmp-targets is always used in conjunction with the
708 // option -fopenmp specifying a valid runtime with offloading support,
709 // i.e. libomp or libiomp.
710 bool HasValidOpenMPRuntime = C.getInputArgs().hasFlag(
711 options::OPT_fopenmp, options::OPT_fopenmp_EQ,
712 options::OPT_fno_openmp, false);
713 if (HasValidOpenMPRuntime) {
714 OpenMPRuntimeKind OpenMPKind = getOpenMPRuntime(C.getInputArgs());
715 HasValidOpenMPRuntime =
716 OpenMPKind == OMPRT_OMP || OpenMPKind == OMPRT_IOMP5;
717 }
718
719 if (HasValidOpenMPRuntime) {
720 llvm::StringMap<const char *> FoundNormalizedTriples;
721 for (const char *Val : OpenMPTargets->getValues()) {
722 llvm::Triple TT(Val);
723 std::string NormalizedName = TT.normalize();
724
725 // Make sure we don't have a duplicate triple.
726 auto Duplicate = FoundNormalizedTriples.find(NormalizedName);
727 if (Duplicate != FoundNormalizedTriples.end()) {
728 Diag(clang::diag::warn_drv_omp_offload_target_duplicate)
729 << Val << Duplicate->second;
730 continue;
731 }
732
733 // Store the current triple so that we can check for duplicates in the
734 // following iterations.
735 FoundNormalizedTriples[NormalizedName] = Val;
736
737 // If the specified target is invalid, emit a diagnostic.
738 if (TT.getArch() == llvm::Triple::UnknownArch)
739 Diag(clang::diag::err_drv_invalid_omp_target) << Val;
740 else {
741 const ToolChain *TC;
742 // CUDA toolchains have to be selected differently. They pair host
743 // and device in their implementation.
744 if (TT.isNVPTX()) {
745 const ToolChain *HostTC =
746 C.getSingleOffloadToolChain<Action::OFK_Host>();
747 assert(HostTC && "Host toolchain should be always defined.")((HostTC && "Host toolchain should be always defined."
) ? static_cast<void> (0) : __assert_fail ("HostTC && \"Host toolchain should be always defined.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 747, __PRETTY_FUNCTION__))
;
748 auto &CudaTC =
749 ToolChains[TT.str() + "/" + HostTC->getTriple().normalize()];
750 if (!CudaTC)
751 CudaTC = std::make_unique<toolchains::CudaToolChain>(
752 *this, TT, *HostTC, C.getInputArgs(), Action::OFK_OpenMP);
753 TC = CudaTC.get();
754 } else
755 TC = &getToolChain(C.getInputArgs(), TT);
756 C.addOffloadDeviceToolChain(TC, Action::OFK_OpenMP);
757 }
758 }
759 } else
760 Diag(clang::diag::err_drv_expecting_fopenmp_with_fopenmp_targets);
761 } else
762 Diag(clang::diag::warn_drv_empty_joined_argument)
763 << OpenMPTargets->getAsString(C.getInputArgs());
764 }
765
766 //
767 // TODO: Add support for other offloading programming models here.
768 //
769}
770
771/// Looks the given directories for the specified file.
772///
773/// \param[out] FilePath File path, if the file was found.
774/// \param[in] Dirs Directories used for the search.
775/// \param[in] FileName Name of the file to search for.
776/// \return True if file was found.
777///
778/// Looks for file specified by FileName sequentially in directories specified
779/// by Dirs.
780///
781static bool searchForFile(SmallVectorImpl<char> &FilePath,
782 ArrayRef<StringRef> Dirs, StringRef FileName) {
783 SmallString<128> WPath;
784 for (const StringRef &Dir : Dirs) {
785 if (Dir.empty())
786 continue;
787 WPath.clear();
788 llvm::sys::path::append(WPath, Dir, FileName);
789 llvm::sys::path::native(WPath);
790 if (llvm::sys::fs::is_regular_file(WPath)) {
791 FilePath = std::move(WPath);
792 return true;
793 }
794 }
795 return false;
796}
797
798bool Driver::readConfigFile(StringRef FileName) {
799 // Try reading the given file.
800 SmallVector<const char *, 32> NewCfgArgs;
801 if (!llvm::cl::readConfigFile(FileName, Saver, NewCfgArgs)) {
802 Diag(diag::err_drv_cannot_read_config_file) << FileName;
803 return true;
804 }
805
806 // Read options from config file.
807 llvm::SmallString<128> CfgFileName(FileName);
808 llvm::sys::path::native(CfgFileName);
809 ConfigFile = std::string(CfgFileName);
810 bool ContainErrors;
811 CfgOptions = std::make_unique<InputArgList>(
812 ParseArgStrings(NewCfgArgs, IsCLMode(), ContainErrors));
813 if (ContainErrors) {
814 CfgOptions.reset();
815 return true;
816 }
817
818 if (CfgOptions->hasArg(options::OPT_config)) {
819 CfgOptions.reset();
820 Diag(diag::err_drv_nested_config_file);
821 return true;
822 }
823
824 // Claim all arguments that come from a configuration file so that the driver
825 // does not warn on any that is unused.
826 for (Arg *A : *CfgOptions)
827 A->claim();
828 return false;
829}
830
831bool Driver::loadConfigFile() {
832 std::string CfgFileName;
833 bool FileSpecifiedExplicitly = false;
834
835 // Process options that change search path for config files.
836 if (CLOptions) {
837 if (CLOptions->hasArg(options::OPT_config_system_dir_EQ)) {
838 SmallString<128> CfgDir;
839 CfgDir.append(
840 CLOptions->getLastArgValue(options::OPT_config_system_dir_EQ));
841 if (!CfgDir.empty()) {
842 if (llvm::sys::fs::make_absolute(CfgDir).value() != 0)
843 SystemConfigDir.clear();
844 else
845 SystemConfigDir = std::string(CfgDir.begin(), CfgDir.end());
846 }
847 }
848 if (CLOptions->hasArg(options::OPT_config_user_dir_EQ)) {
849 SmallString<128> CfgDir;
850 CfgDir.append(
851 CLOptions->getLastArgValue(options::OPT_config_user_dir_EQ));
852 if (!CfgDir.empty()) {
853 if (llvm::sys::fs::make_absolute(CfgDir).value() != 0)
854 UserConfigDir.clear();
855 else
856 UserConfigDir = std::string(CfgDir.begin(), CfgDir.end());
857 }
858 }
859 }
860
861 // First try to find config file specified in command line.
862 if (CLOptions) {
863 std::vector<std::string> ConfigFiles =
864 CLOptions->getAllArgValues(options::OPT_config);
865 if (ConfigFiles.size() > 1) {
866 if (!std::all_of(ConfigFiles.begin(), ConfigFiles.end(),
867 [ConfigFiles](const std::string &s) {
868 return s == ConfigFiles[0];
869 })) {
870 Diag(diag::err_drv_duplicate_config);
871 return true;
872 }
873 }
874
875 if (!ConfigFiles.empty()) {
876 CfgFileName = ConfigFiles.front();
877 assert(!CfgFileName.empty())((!CfgFileName.empty()) ? static_cast<void> (0) : __assert_fail
("!CfgFileName.empty()", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 877, __PRETTY_FUNCTION__))
;
878
879 // If argument contains directory separator, treat it as a path to
880 // configuration file.
881 if (llvm::sys::path::has_parent_path(CfgFileName)) {
882 SmallString<128> CfgFilePath;
883 if (llvm::sys::path::is_relative(CfgFileName))
884 llvm::sys::fs::current_path(CfgFilePath);
885 llvm::sys::path::append(CfgFilePath, CfgFileName);
886 if (!llvm::sys::fs::is_regular_file(CfgFilePath)) {
887 Diag(diag::err_drv_config_file_not_exist) << CfgFilePath;
888 return true;
889 }
890 return readConfigFile(CfgFilePath);
891 }
892
893 FileSpecifiedExplicitly = true;
894 }
895 }
896
897 // If config file is not specified explicitly, try to deduce configuration
898 // from executable name. For instance, an executable 'armv7l-clang' will
899 // search for config file 'armv7l-clang.cfg'.
900 if (CfgFileName.empty() && !ClangNameParts.TargetPrefix.empty())
901 CfgFileName = ClangNameParts.TargetPrefix + '-' + ClangNameParts.ModeSuffix;
902
903 if (CfgFileName.empty())
904 return false;
905
906 // Determine architecture part of the file name, if it is present.
907 StringRef CfgFileArch = CfgFileName;
908 size_t ArchPrefixLen = CfgFileArch.find('-');
909 if (ArchPrefixLen == StringRef::npos)
910 ArchPrefixLen = CfgFileArch.size();
911 llvm::Triple CfgTriple;
912 CfgFileArch = CfgFileArch.take_front(ArchPrefixLen);
913 CfgTriple = llvm::Triple(llvm::Triple::normalize(CfgFileArch));
914 if (CfgTriple.getArch() == llvm::Triple::ArchType::UnknownArch)
915 ArchPrefixLen = 0;
916
917 if (!StringRef(CfgFileName).endswith(".cfg"))
918 CfgFileName += ".cfg";
919
920 // If config file starts with architecture name and command line options
921 // redefine architecture (with options like -m32 -LE etc), try finding new
922 // config file with that architecture.
923 SmallString<128> FixedConfigFile;
924 size_t FixedArchPrefixLen = 0;
925 if (ArchPrefixLen) {
926 // Get architecture name from config file name like 'i386.cfg' or
927 // 'armv7l-clang.cfg'.
928 // Check if command line options changes effective triple.
929 llvm::Triple EffectiveTriple = computeTargetTriple(*this,
930 CfgTriple.getTriple(), *CLOptions);
931 if (CfgTriple.getArch() != EffectiveTriple.getArch()) {
932 FixedConfigFile = EffectiveTriple.getArchName();
933 FixedArchPrefixLen = FixedConfigFile.size();
934 // Append the rest of original file name so that file name transforms
935 // like: i386-clang.cfg -> x86_64-clang.cfg.
936 if (ArchPrefixLen < CfgFileName.size())
937 FixedConfigFile += CfgFileName.substr(ArchPrefixLen);
938 }
939 }
940
941 // Prepare list of directories where config file is searched for.
942 StringRef CfgFileSearchDirs[] = {UserConfigDir, SystemConfigDir, Dir};
943
944 // Try to find config file. First try file with corrected architecture.
945 llvm::SmallString<128> CfgFilePath;
946 if (!FixedConfigFile.empty()) {
947 if (searchForFile(CfgFilePath, CfgFileSearchDirs, FixedConfigFile))
948 return readConfigFile(CfgFilePath);
949 // If 'x86_64-clang.cfg' was not found, try 'x86_64.cfg'.
950 FixedConfigFile.resize(FixedArchPrefixLen);
951 FixedConfigFile.append(".cfg");
952 if (searchForFile(CfgFilePath, CfgFileSearchDirs, FixedConfigFile))
953 return readConfigFile(CfgFilePath);
954 }
955
956 // Then try original file name.
957 if (searchForFile(CfgFilePath, CfgFileSearchDirs, CfgFileName))
958 return readConfigFile(CfgFilePath);
959
960 // Finally try removing driver mode part: 'x86_64-clang.cfg' -> 'x86_64.cfg'.
961 if (!ClangNameParts.ModeSuffix.empty() &&
962 !ClangNameParts.TargetPrefix.empty()) {
963 CfgFileName.assign(ClangNameParts.TargetPrefix);
964 CfgFileName.append(".cfg");
965 if (searchForFile(CfgFilePath, CfgFileSearchDirs, CfgFileName))
966 return readConfigFile(CfgFilePath);
967 }
968
969 // Report error but only if config file was specified explicitly, by option
970 // --config. If it was deduced from executable name, it is not an error.
971 if (FileSpecifiedExplicitly) {
972 Diag(diag::err_drv_config_file_not_found) << CfgFileName;
973 for (const StringRef &SearchDir : CfgFileSearchDirs)
974 if (!SearchDir.empty())
975 Diag(diag::note_drv_config_file_searched_in) << SearchDir;
976 return true;
977 }
978
979 return false;
980}
981
982Compilation *Driver::BuildCompilation(ArrayRef<const char *> ArgList) {
983 llvm::PrettyStackTraceString CrashInfo("Compilation construction");
984
985 // FIXME: Handle environment options which affect driver behavior, somewhere
986 // (client?). GCC_EXEC_PREFIX, LPATH, CC_PRINT_OPTIONS.
987
988 // We look for the driver mode option early, because the mode can affect
989 // how other options are parsed.
990 ParseDriverMode(ClangExecutable, ArgList.slice(1));
991
992 // FIXME: What are we going to do with -V and -b?
993
994 // Arguments specified in command line.
995 bool ContainsError;
996 CLOptions = std::make_unique<InputArgList>(
997 ParseArgStrings(ArgList.slice(1), IsCLMode(), ContainsError));
998
999 // Try parsing configuration file.
1000 if (!ContainsError)
1001 ContainsError = loadConfigFile();
1002 bool HasConfigFile = !ContainsError && (CfgOptions.get() != nullptr);
1003
1004 // All arguments, from both config file and command line.
1005 InputArgList Args = std::move(HasConfigFile ? std::move(*CfgOptions)
1006 : std::move(*CLOptions));
1007
1008 // The args for config files or /clang: flags belong to different InputArgList
1009 // objects than Args. This copies an Arg from one of those other InputArgLists
1010 // to the ownership of Args.
1011 auto appendOneArg = [&Args](const Arg *Opt, const Arg *BaseArg) {
1012 unsigned Index = Args.MakeIndex(Opt->getSpelling());
1013 Arg *Copy = new llvm::opt::Arg(Opt->getOption(), Args.getArgString(Index),
1014 Index, BaseArg);
1015 Copy->getValues() = Opt->getValues();
1016 if (Opt->isClaimed())
1017 Copy->claim();
1018 Copy->setOwnsValues(Opt->getOwnsValues());
1019 Opt->setOwnsValues(false);
1020 Args.append(Copy);
1021 };
1022
1023 if (HasConfigFile)
1024 for (auto *Opt : *CLOptions) {
1025 if (Opt->getOption().matches(options::OPT_config))
1026 continue;
1027 const Arg *BaseArg = &Opt->getBaseArg();
1028 if (BaseArg == Opt)
1029 BaseArg = nullptr;
1030 appendOneArg(Opt, BaseArg);
1031 }
1032
1033 // In CL mode, look for any pass-through arguments
1034 if (IsCLMode() && !ContainsError) {
1035 SmallVector<const char *, 16> CLModePassThroughArgList;
1036 for (const auto *A : Args.filtered(options::OPT__SLASH_clang)) {
1037 A->claim();
1038 CLModePassThroughArgList.push_back(A->getValue());
1039 }
1040
1041 if (!CLModePassThroughArgList.empty()) {
1042 // Parse any pass through args using default clang processing rather
1043 // than clang-cl processing.
1044 auto CLModePassThroughOptions = std::make_unique<InputArgList>(
1045 ParseArgStrings(CLModePassThroughArgList, false, ContainsError));
1046
1047 if (!ContainsError)
1048 for (auto *Opt : *CLModePassThroughOptions) {
1049 appendOneArg(Opt, nullptr);
1050 }
1051 }
1052 }
1053
1054 // Check for working directory option before accessing any files
1055 if (Arg *WD = Args.getLastArg(options::OPT_working_directory))
1056 if (VFS->setCurrentWorkingDirectory(WD->getValue()))
1057 Diag(diag::err_drv_unable_to_set_working_directory) << WD->getValue();
1058
1059 // FIXME: This stuff needs to go into the Compilation, not the driver.
1060 bool CCCPrintPhases;
1061
1062 // Silence driver warnings if requested
1063 Diags.setIgnoreAllWarnings(Args.hasArg(options::OPT_w));
1064
1065 // -no-canonical-prefixes is used very early in main.
1066 Args.ClaimAllArgs(options::OPT_no_canonical_prefixes);
1067
1068 // f(no-)integated-cc1 is also used very early in main.
1069 Args.ClaimAllArgs(options::OPT_fintegrated_cc1);
1070 Args.ClaimAllArgs(options::OPT_fno_integrated_cc1);
1071
1072 // Ignore -pipe.
1073 Args.ClaimAllArgs(options::OPT_pipe);
1074
1075 // Extract -ccc args.
1076 //
1077 // FIXME: We need to figure out where this behavior should live. Most of it
1078 // should be outside in the client; the parts that aren't should have proper
1079 // options, either by introducing new ones or by overloading gcc ones like -V
1080 // or -b.
1081 CCCPrintPhases = Args.hasArg(options::OPT_ccc_print_phases);
1082 CCCPrintBindings = Args.hasArg(options::OPT_ccc_print_bindings);
1083 if (const Arg *A = Args.getLastArg(options::OPT_ccc_gcc_name))
1084 CCCGenericGCCName = A->getValue();
1085 GenReproducer = Args.hasFlag(options::OPT_gen_reproducer,
1086 options::OPT_fno_crash_diagnostics,
1087 !!::getenv("FORCE_CLANG_DIAGNOSTICS_CRASH"));
1088 // FIXME: TargetTriple is used by the target-prefixed calls to as/ld
1089 // and getToolChain is const.
1090 if (IsCLMode()) {
1091 // clang-cl targets MSVC-style Win32.
1092 llvm::Triple T(TargetTriple);
1093 T.setOS(llvm::Triple::Win32);
1094 T.setVendor(llvm::Triple::PC);
1095 T.setEnvironment(llvm::Triple::MSVC);
1096 T.setObjectFormat(llvm::Triple::COFF);
1097 TargetTriple = T.str();
1098 }
1099 if (const Arg *A = Args.getLastArg(options::OPT_target))
1100 TargetTriple = A->getValue();
1101 if (const Arg *A = Args.getLastArg(options::OPT_ccc_install_dir))
1102 Dir = InstalledDir = A->getValue();
1103 for (const Arg *A : Args.filtered(options::OPT_B)) {
1104 A->claim();
1105 PrefixDirs.push_back(A->getValue(0));
1106 }
1107 if (Optional<std::string> CompilerPathValue =
1108 llvm::sys::Process::GetEnv("COMPILER_PATH")) {
1109 StringRef CompilerPath = *CompilerPathValue;
1110 while (!CompilerPath.empty()) {
1111 std::pair<StringRef, StringRef> Split =
1112 CompilerPath.split(llvm::sys::EnvPathSeparator);
1113 PrefixDirs.push_back(std::string(Split.first));
1114 CompilerPath = Split.second;
1115 }
1116 }
1117 if (const Arg *A = Args.getLastArg(options::OPT__sysroot_EQ))
1118 SysRoot = A->getValue();
1119 if (const Arg *A = Args.getLastArg(options::OPT__dyld_prefix_EQ))
1120 DyldPrefix = A->getValue();
1121
1122 if (const Arg *A = Args.getLastArg(options::OPT_resource_dir))
1123 ResourceDir = A->getValue();
1124
1125 if (const Arg *A = Args.getLastArg(options::OPT_save_temps_EQ)) {
1126 SaveTemps = llvm::StringSwitch<SaveTempsMode>(A->getValue())
1127 .Case("cwd", SaveTempsCwd)
1128 .Case("obj", SaveTempsObj)
1129 .Default(SaveTempsCwd);
1130 }
1131
1132 setLTOMode(Args);
1133
1134 // Process -fembed-bitcode= flags.
1135 if (Arg *A = Args.getLastArg(options::OPT_fembed_bitcode_EQ)) {
1136 StringRef Name = A->getValue();
1137 unsigned Model = llvm::StringSwitch<unsigned>(Name)
1138 .Case("off", EmbedNone)
1139 .Case("all", EmbedBitcode)
1140 .Case("bitcode", EmbedBitcode)
1141 .Case("marker", EmbedMarker)
1142 .Default(~0U);
1143 if (Model == ~0U) {
1144 Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
1145 << Name;
1146 } else
1147 BitcodeEmbed = static_cast<BitcodeEmbedMode>(Model);
1148 }
1149
1150 std::unique_ptr<llvm::opt::InputArgList> UArgs =
1151 std::make_unique<InputArgList>(std::move(Args));
1152
1153 // Perform the default argument translations.
1154 DerivedArgList *TranslatedArgs = TranslateInputArgs(*UArgs);
1155
1156 // Owned by the host.
1157 const ToolChain &TC = getToolChain(
1158 *UArgs, computeTargetTriple(*this, TargetTriple, *UArgs));
1159
1160 // The compilation takes ownership of Args.
1161 Compilation *C = new Compilation(*this, TC, UArgs.release(), TranslatedArgs,
1162 ContainsError);
1163
1164 if (!HandleImmediateArgs(*C))
1165 return C;
1166
1167 // Construct the list of inputs.
1168 InputList Inputs;
1169 BuildInputs(C->getDefaultToolChain(), *TranslatedArgs, Inputs);
1170
1171 // Populate the tool chains for the offloading devices, if any.
1172 CreateOffloadingDeviceToolChains(*C, Inputs);
1173
1174 // Construct the list of abstract actions to perform for this compilation. On
1175 // MachO targets this uses the driver-driver and universal actions.
1176 if (TC.getTriple().isOSBinFormatMachO())
1177 BuildUniversalActions(*C, C->getDefaultToolChain(), Inputs);
1178 else
1179 BuildActions(*C, C->getArgs(), Inputs, C->getActions());
1180
1181 if (CCCPrintPhases) {
1182 PrintActions(*C);
1183 return C;
1184 }
1185
1186 BuildJobs(*C);
1187
1188 return C;
1189}
1190
1191static void printArgList(raw_ostream &OS, const llvm::opt::ArgList &Args) {
1192 llvm::opt::ArgStringList ASL;
1193 for (const auto *A : Args)
1194 A->render(Args, ASL);
1195
1196 for (auto I = ASL.begin(), E = ASL.end(); I != E; ++I) {
1197 if (I != ASL.begin())
1198 OS << ' ';
1199 llvm::sys::printArg(OS, *I, true);
1200 }
1201 OS << '\n';
1202}
1203
1204bool Driver::getCrashDiagnosticFile(StringRef ReproCrashFilename,
1205 SmallString<128> &CrashDiagDir) {
1206 using namespace llvm::sys;
1207 assert(llvm::Triple(llvm::sys::getProcessTriple()).isOSDarwin() &&((llvm::Triple(llvm::sys::getProcessTriple()).isOSDarwin() &&
"Only knows about .crash files on Darwin") ? static_cast<
void> (0) : __assert_fail ("llvm::Triple(llvm::sys::getProcessTriple()).isOSDarwin() && \"Only knows about .crash files on Darwin\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 1208, __PRETTY_FUNCTION__))
1208 "Only knows about .crash files on Darwin")((llvm::Triple(llvm::sys::getProcessTriple()).isOSDarwin() &&
"Only knows about .crash files on Darwin") ? static_cast<
void> (0) : __assert_fail ("llvm::Triple(llvm::sys::getProcessTriple()).isOSDarwin() && \"Only knows about .crash files on Darwin\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 1208, __PRETTY_FUNCTION__))
;
1209
1210 // The .crash file can be found on at ~/Library/Logs/DiagnosticReports/
1211 // (or /Library/Logs/DiagnosticReports for root) and has the filename pattern
1212 // clang-<VERSION>_<YYYY-MM-DD-HHMMSS>_<hostname>.crash.
1213 path::home_directory(CrashDiagDir);
1214 if (CrashDiagDir.startswith("/var/root"))
1215 CrashDiagDir = "/";
1216 path::append(CrashDiagDir, "Library/Logs/DiagnosticReports");
1217 int PID =
1218#if LLVM_ON_UNIX1
1219 getpid();
1220#else
1221 0;
1222#endif
1223 std::error_code EC;
1224 fs::file_status FileStatus;
1225 TimePoint<> LastAccessTime;
1226 SmallString<128> CrashFilePath;
1227 // Lookup the .crash files and get the one generated by a subprocess spawned
1228 // by this driver invocation.
1229 for (fs::directory_iterator File(CrashDiagDir, EC), FileEnd;
1230 File != FileEnd && !EC; File.increment(EC)) {
1231 StringRef FileName = path::filename(File->path());
1232 if (!FileName.startswith(Name))
1233 continue;
1234 if (fs::status(File->path(), FileStatus))
1235 continue;
1236 llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> CrashFile =
1237 llvm::MemoryBuffer::getFile(File->path());
1238 if (!CrashFile)
1239 continue;
1240 // The first line should start with "Process:", otherwise this isn't a real
1241 // .crash file.
1242 StringRef Data = CrashFile.get()->getBuffer();
1243 if (!Data.startswith("Process:"))
1244 continue;
1245 // Parse parent process pid line, e.g: "Parent Process: clang-4.0 [79141]"
1246 size_t ParentProcPos = Data.find("Parent Process:");
1247 if (ParentProcPos == StringRef::npos)
1248 continue;
1249 size_t LineEnd = Data.find_first_of("\n", ParentProcPos);
1250 if (LineEnd == StringRef::npos)
1251 continue;
1252 StringRef ParentProcess = Data.slice(ParentProcPos+15, LineEnd).trim();
1253 int OpenBracket = -1, CloseBracket = -1;
1254 for (size_t i = 0, e = ParentProcess.size(); i < e; ++i) {
1255 if (ParentProcess[i] == '[')
1256 OpenBracket = i;
1257 if (ParentProcess[i] == ']')
1258 CloseBracket = i;
1259 }
1260 // Extract the parent process PID from the .crash file and check whether
1261 // it matches this driver invocation pid.
1262 int CrashPID;
1263 if (OpenBracket < 0 || CloseBracket < 0 ||
1264 ParentProcess.slice(OpenBracket + 1, CloseBracket)
1265 .getAsInteger(10, CrashPID) || CrashPID != PID) {
1266 continue;
1267 }
1268
1269 // Found a .crash file matching the driver pid. To avoid getting an older
1270 // and misleading crash file, continue looking for the most recent.
1271 // FIXME: the driver can dispatch multiple cc1 invocations, leading to
1272 // multiple crashes poiting to the same parent process. Since the driver
1273 // does not collect pid information for the dispatched invocation there's
1274 // currently no way to distinguish among them.
1275 const auto FileAccessTime = FileStatus.getLastModificationTime();
1276 if (FileAccessTime > LastAccessTime) {
1277 CrashFilePath.assign(File->path());
1278 LastAccessTime = FileAccessTime;
1279 }
1280 }
1281
1282 // If found, copy it over to the location of other reproducer files.
1283 if (!CrashFilePath.empty()) {
1284 EC = fs::copy_file(CrashFilePath, ReproCrashFilename);
1285 if (EC)
1286 return false;
1287 return true;
1288 }
1289
1290 return false;
1291}
1292
1293// When clang crashes, produce diagnostic information including the fully
1294// preprocessed source file(s). Request that the developer attach the
1295// diagnostic information to a bug report.
1296void Driver::generateCompilationDiagnostics(
1297 Compilation &C, const Command &FailingCommand,
1298 StringRef AdditionalInformation, CompilationDiagnosticReport *Report) {
1299 if (C.getArgs().hasArg(options::OPT_fno_crash_diagnostics))
1300 return;
1301
1302 // Don't try to generate diagnostics for link or dsymutil jobs.
1303 if (FailingCommand.getCreator().isLinkJob() ||
1304 FailingCommand.getCreator().isDsymutilJob())
1305 return;
1306
1307 // Print the version of the compiler.
1308 PrintVersion(C, llvm::errs());
1309
1310 // Suppress driver output and emit preprocessor output to temp file.
1311 Mode = CPPMode;
1312 CCGenDiagnostics = true;
1313
1314 // Save the original job command(s).
1315 Command Cmd = FailingCommand;
1316
1317 // Keep track of whether we produce any errors while trying to produce
1318 // preprocessed sources.
1319 DiagnosticErrorTrap Trap(Diags);
1320
1321 // Suppress tool output.
1322 C.initCompilationForDiagnostics();
1323
1324 // Construct the list of inputs.
1325 InputList Inputs;
1326 BuildInputs(C.getDefaultToolChain(), C.getArgs(), Inputs);
1327
1328 for (InputList::iterator it = Inputs.begin(), ie = Inputs.end(); it != ie;) {
1329 bool IgnoreInput = false;
1330
1331 // Ignore input from stdin or any inputs that cannot be preprocessed.
1332 // Check type first as not all linker inputs have a value.
1333 if (types::getPreprocessedType(it->first) == types::TY_INVALID) {
1334 IgnoreInput = true;
1335 } else if (!strcmp(it->second->getValue(), "-")) {
1336 Diag(clang::diag::note_drv_command_failed_diag_msg)
1337 << "Error generating preprocessed source(s) - "
1338 "ignoring input from stdin.";
1339 IgnoreInput = true;
1340 }
1341
1342 if (IgnoreInput) {
1343 it = Inputs.erase(it);
1344 ie = Inputs.end();
1345 } else {
1346 ++it;
1347 }
1348 }
1349
1350 if (Inputs.empty()) {
1351 Diag(clang::diag::note_drv_command_failed_diag_msg)
1352 << "Error generating preprocessed source(s) - "
1353 "no preprocessable inputs.";
1354 return;
1355 }
1356
1357 // Don't attempt to generate preprocessed files if multiple -arch options are
1358 // used, unless they're all duplicates.
1359 llvm::StringSet<> ArchNames;
1360 for (const Arg *A : C.getArgs()) {
1361 if (A->getOption().matches(options::OPT_arch)) {
1362 StringRef ArchName = A->getValue();
1363 ArchNames.insert(ArchName);
1364 }
1365 }
1366 if (ArchNames.size() > 1) {
1367 Diag(clang::diag::note_drv_command_failed_diag_msg)
1368 << "Error generating preprocessed source(s) - cannot generate "
1369 "preprocessed source with multiple -arch options.";
1370 return;
1371 }
1372
1373 // Construct the list of abstract actions to perform for this compilation. On
1374 // Darwin OSes this uses the driver-driver and builds universal actions.
1375 const ToolChain &TC = C.getDefaultToolChain();
1376 if (TC.getTriple().isOSBinFormatMachO())
1377 BuildUniversalActions(C, TC, Inputs);
1378 else
1379 BuildActions(C, C.getArgs(), Inputs, C.getActions());
1380
1381 BuildJobs(C);
1382
1383 // If there were errors building the compilation, quit now.
1384 if (Trap.hasErrorOccurred()) {
1385 Diag(clang::diag::note_drv_command_failed_diag_msg)
1386 << "Error generating preprocessed source(s).";
1387 return;
1388 }
1389
1390 // Generate preprocessed output.
1391 SmallVector<std::pair<int, const Command *>, 4> FailingCommands;
1392 C.ExecuteJobs(C.getJobs(), FailingCommands);
1393
1394 // If any of the preprocessing commands failed, clean up and exit.
1395 if (!FailingCommands.empty()) {
1396 Diag(clang::diag::note_drv_command_failed_diag_msg)
1397 << "Error generating preprocessed source(s).";
1398 return;
1399 }
1400
1401 const ArgStringList &TempFiles = C.getTempFiles();
1402 if (TempFiles.empty()) {
1403 Diag(clang::diag::note_drv_command_failed_diag_msg)
1404 << "Error generating preprocessed source(s).";
1405 return;
1406 }
1407
1408 Diag(clang::diag::note_drv_command_failed_diag_msg)
1409 << "\n********************\n\n"
1410 "PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:\n"
1411 "Preprocessed source(s) and associated run script(s) are located at:";
1412
1413 SmallString<128> VFS;
1414 SmallString<128> ReproCrashFilename;
1415 for (const char *TempFile : TempFiles) {
1416 Diag(clang::diag::note_drv_command_failed_diag_msg) << TempFile;
1417 if (Report)
1418 Report->TemporaryFiles.push_back(TempFile);
1419 if (ReproCrashFilename.empty()) {
1420 ReproCrashFilename = TempFile;
1421 llvm::sys::path::replace_extension(ReproCrashFilename, ".crash");
1422 }
1423 if (StringRef(TempFile).endswith(".cache")) {
1424 // In some cases (modules) we'll dump extra data to help with reproducing
1425 // the crash into a directory next to the output.
1426 VFS = llvm::sys::path::filename(TempFile);
1427 llvm::sys::path::append(VFS, "vfs", "vfs.yaml");
1428 }
1429 }
1430
1431 // Assume associated files are based off of the first temporary file.
1432 CrashReportInfo CrashInfo(TempFiles[0], VFS);
1433
1434 llvm::SmallString<128> Script(CrashInfo.Filename);
1435 llvm::sys::path::replace_extension(Script, "sh");
1436 std::error_code EC;
1437 llvm::raw_fd_ostream ScriptOS(Script, EC, llvm::sys::fs::CD_CreateNew);
1438 if (EC) {
1439 Diag(clang::diag::note_drv_command_failed_diag_msg)
1440 << "Error generating run script: " << Script << " " << EC.message();
1441 } else {
1442 ScriptOS << "# Crash reproducer for " << getClangFullVersion() << "\n"
1443 << "# Driver args: ";
1444 printArgList(ScriptOS, C.getInputArgs());
1445 ScriptOS << "# Original command: ";
1446 Cmd.Print(ScriptOS, "\n", /*Quote=*/true);
1447 Cmd.Print(ScriptOS, "\n", /*Quote=*/true, &CrashInfo);
1448 if (!AdditionalInformation.empty())
1449 ScriptOS << "\n# Additional information: " << AdditionalInformation
1450 << "\n";
1451 if (Report)
1452 Report->TemporaryFiles.push_back(std::string(Script.str()));
1453 Diag(clang::diag::note_drv_command_failed_diag_msg) << Script;
1454 }
1455
1456 // On darwin, provide information about the .crash diagnostic report.
1457 if (llvm::Triple(llvm::sys::getProcessTriple()).isOSDarwin()) {
1458 SmallString<128> CrashDiagDir;
1459 if (getCrashDiagnosticFile(ReproCrashFilename, CrashDiagDir)) {
1460 Diag(clang::diag::note_drv_command_failed_diag_msg)
1461 << ReproCrashFilename.str();
1462 } else { // Suggest a directory for the user to look for .crash files.
1463 llvm::sys::path::append(CrashDiagDir, Name);
1464 CrashDiagDir += "_<YYYY-MM-DD-HHMMSS>_<hostname>.crash";
1465 Diag(clang::diag::note_drv_command_failed_diag_msg)
1466 << "Crash backtrace is located in";
1467 Diag(clang::diag::note_drv_command_failed_diag_msg)
1468 << CrashDiagDir.str();
1469 Diag(clang::diag::note_drv_command_failed_diag_msg)
1470 << "(choose the .crash file that corresponds to your crash)";
1471 }
1472 }
1473
1474 for (const auto &A : C.getArgs().filtered(options::OPT_frewrite_map_file,
1475 options::OPT_frewrite_map_file_EQ))
1476 Diag(clang::diag::note_drv_command_failed_diag_msg) << A->getValue();
1477
1478 Diag(clang::diag::note_drv_command_failed_diag_msg)
1479 << "\n\n********************";
1480}
1481
1482void Driver::setUpResponseFiles(Compilation &C, Command &Cmd) {
1483 // Since commandLineFitsWithinSystemLimits() may underestimate system's
1484 // capacity if the tool does not support response files, there is a chance/
1485 // that things will just work without a response file, so we silently just
1486 // skip it.
1487 if (Cmd.getResponseFileSupport().ResponseKind ==
1488 ResponseFileSupport::RF_None ||
1489 llvm::sys::commandLineFitsWithinSystemLimits(Cmd.getExecutable(),
1490 Cmd.getArguments()))
1491 return;
1492
1493 std::string TmpName = GetTemporaryPath("response", "txt");
1494 Cmd.setResponseFile(C.addTempFile(C.getArgs().MakeArgString(TmpName)));
1495}
1496
1497int Driver::ExecuteCompilation(
1498 Compilation &C,
1499 SmallVectorImpl<std::pair<int, const Command *>> &FailingCommands) {
1500 // Just print if -### was present.
1501 if (C.getArgs().hasArg(options::OPT__HASH_HASH_HASH)) {
1502 C.getJobs().Print(llvm::errs(), "\n", true);
1503 return 0;
1504 }
1505
1506 // If there were errors building the compilation, quit now.
1507 if (Diags.hasErrorOccurred())
1508 return 1;
1509
1510 // Set up response file names for each command, if necessary
1511 for (auto &Job : C.getJobs())
1512 setUpResponseFiles(C, Job);
1513
1514 C.ExecuteJobs(C.getJobs(), FailingCommands);
1515
1516 // If the command succeeded, we are done.
1517 if (FailingCommands.empty())
1518 return 0;
1519
1520 // Otherwise, remove result files and print extra information about abnormal
1521 // failures.
1522 int Res = 0;
1523 for (const auto &CmdPair : FailingCommands) {
1524 int CommandRes = CmdPair.first;
1525 const Command *FailingCommand = CmdPair.second;
1526
1527 // Remove result files if we're not saving temps.
1528 if (!isSaveTempsEnabled()) {
1529 const JobAction *JA = cast<JobAction>(&FailingCommand->getSource());
1530 C.CleanupFileMap(C.getResultFiles(), JA, true);
1531
1532 // Failure result files are valid unless we crashed.
1533 if (CommandRes < 0)
1534 C.CleanupFileMap(C.getFailureResultFiles(), JA, true);
1535 }
1536
1537#if LLVM_ON_UNIX1
1538 // llvm/lib/Support/Unix/Signals.inc will exit with a special return code
1539 // for SIGPIPE. Do not print diagnostics for this case.
1540 if (CommandRes == EX_IOERR74) {
1541 Res = CommandRes;
1542 continue;
1543 }
1544#endif
1545
1546 // Print extra information about abnormal failures, if possible.
1547 //
1548 // This is ad-hoc, but we don't want to be excessively noisy. If the result
1549 // status was 1, assume the command failed normally. In particular, if it
1550 // was the compiler then assume it gave a reasonable error code. Failures
1551 // in other tools are less common, and they generally have worse
1552 // diagnostics, so always print the diagnostic there.
1553 const Tool &FailingTool = FailingCommand->getCreator();
1554
1555 if (!FailingCommand->getCreator().hasGoodDiagnostics() || CommandRes != 1) {
1556 // FIXME: See FIXME above regarding result code interpretation.
1557 if (CommandRes < 0)
1558 Diag(clang::diag::err_drv_command_signalled)
1559 << FailingTool.getShortName();
1560 else
1561 Diag(clang::diag::err_drv_command_failed)
1562 << FailingTool.getShortName() << CommandRes;
1563 }
1564 }
1565 return Res;
1566}
1567
1568void Driver::PrintHelp(bool ShowHidden) const {
1569 unsigned IncludedFlagsBitmask;
1570 unsigned ExcludedFlagsBitmask;
1571 std::tie(IncludedFlagsBitmask, ExcludedFlagsBitmask) =
1572 getIncludeExcludeOptionFlagMasks(IsCLMode());
1573
1574 ExcludedFlagsBitmask |= options::NoDriverOption;
1575 if (!ShowHidden)
1576 ExcludedFlagsBitmask |= HelpHidden;
1577
1578 if (IsFlangMode())
1579 IncludedFlagsBitmask |= options::FlangOption;
1580 else
1581 ExcludedFlagsBitmask |= options::FlangOnlyOption;
1582
1583 std::string Usage = llvm::formatv("{0} [options] file...", Name).str();
1584 getOpts().PrintHelp(llvm::outs(), Usage.c_str(), DriverTitle.c_str(),
1585 IncludedFlagsBitmask, ExcludedFlagsBitmask,
1586 /*ShowAllAliases=*/false);
1587}
1588
1589void Driver::PrintVersion(const Compilation &C, raw_ostream &OS) const {
1590 if (IsFlangMode()) {
1591 OS << getClangToolFullVersion("flang-new") << '\n';
1592 } else {
1593 // FIXME: The following handlers should use a callback mechanism, we don't
1594 // know what the client would like to do.
1595 OS << getClangFullVersion() << '\n';
1596 }
1597 const ToolChain &TC = C.getDefaultToolChain();
1598 OS << "Target: " << TC.getTripleString() << '\n';
1599
1600 // Print the threading model.
1601 if (Arg *A = C.getArgs().getLastArg(options::OPT_mthread_model)) {
1602 // Don't print if the ToolChain would have barfed on it already
1603 if (TC.isThreadModelSupported(A->getValue()))
1604 OS << "Thread model: " << A->getValue();
1605 } else
1606 OS << "Thread model: " << TC.getThreadModel();
1607 OS << '\n';
1608
1609 // Print out the install directory.
1610 OS << "InstalledDir: " << InstalledDir << '\n';
1611
1612 // If configuration file was used, print its path.
1613 if (!ConfigFile.empty())
1614 OS << "Configuration file: " << ConfigFile << '\n';
1615}
1616
1617/// PrintDiagnosticCategories - Implement the --print-diagnostic-categories
1618/// option.
1619static void PrintDiagnosticCategories(raw_ostream &OS) {
1620 // Skip the empty category.
1621 for (unsigned i = 1, max = DiagnosticIDs::getNumberOfCategories(); i != max;
1622 ++i)
1623 OS << i << ',' << DiagnosticIDs::getCategoryNameFromID(i) << '\n';
1624}
1625
1626void Driver::HandleAutocompletions(StringRef PassedFlags) const {
1627 if (PassedFlags == "")
1628 return;
1629 // Print out all options that start with a given argument. This is used for
1630 // shell autocompletion.
1631 std::vector<std::string> SuggestedCompletions;
1632 std::vector<std::string> Flags;
1633
1634 unsigned int DisableFlags =
1635 options::NoDriverOption | options::Unsupported | options::Ignored;
1636
1637 // Make sure that Flang-only options don't pollute the Clang output
1638 // TODO: Make sure that Clang-only options don't pollute Flang output
1639 if (!IsFlangMode())
1640 DisableFlags |= options::FlangOnlyOption;
1641
1642 // Distinguish "--autocomplete=-someflag" and "--autocomplete=-someflag,"
1643 // because the latter indicates that the user put space before pushing tab
1644 // which should end up in a file completion.
1645 const bool HasSpace = PassedFlags.endswith(",");
1646
1647 // Parse PassedFlags by "," as all the command-line flags are passed to this
1648 // function separated by ","
1649 StringRef TargetFlags = PassedFlags;
1650 while (TargetFlags != "") {
1651 StringRef CurFlag;
1652 std::tie(CurFlag, TargetFlags) = TargetFlags.split(",");
1653 Flags.push_back(std::string(CurFlag));
1654 }
1655
1656 // We want to show cc1-only options only when clang is invoked with -cc1 or
1657 // -Xclang.
1658 if (llvm::is_contained(Flags, "-Xclang") || llvm::is_contained(Flags, "-cc1"))
1659 DisableFlags &= ~options::NoDriverOption;
1660
1661 const llvm::opt::OptTable &Opts = getOpts();
1662 StringRef Cur;
1663 Cur = Flags.at(Flags.size() - 1);
1664 StringRef Prev;
1665 if (Flags.size() >= 2) {
1666 Prev = Flags.at(Flags.size() - 2);
1667 SuggestedCompletions = Opts.suggestValueCompletions(Prev, Cur);
1668 }
1669
1670 if (SuggestedCompletions.empty())
1671 SuggestedCompletions = Opts.suggestValueCompletions(Cur, "");
1672
1673 // If Flags were empty, it means the user typed `clang [tab]` where we should
1674 // list all possible flags. If there was no value completion and the user
1675 // pressed tab after a space, we should fall back to a file completion.
1676 // We're printing a newline to be consistent with what we print at the end of
1677 // this function.
1678 if (SuggestedCompletions.empty() && HasSpace && !Flags.empty()) {
1679 llvm::outs() << '\n';
1680 return;
1681 }
1682
1683 // When flag ends with '=' and there was no value completion, return empty
1684 // string and fall back to the file autocompletion.
1685 if (SuggestedCompletions.empty() && !Cur.endswith("=")) {
1686 // If the flag is in the form of "--autocomplete=-foo",
1687 // we were requested to print out all option names that start with "-foo".
1688 // For example, "--autocomplete=-fsyn" is expanded to "-fsyntax-only".
1689 SuggestedCompletions = Opts.findByPrefix(Cur, DisableFlags);
1690
1691 // We have to query the -W flags manually as they're not in the OptTable.
1692 // TODO: Find a good way to add them to OptTable instead and them remove
1693 // this code.
1694 for (StringRef S : DiagnosticIDs::getDiagnosticFlags())
1695 if (S.startswith(Cur))
1696 SuggestedCompletions.push_back(std::string(S));
1697 }
1698
1699 // Sort the autocomplete candidates so that shells print them out in a
1700 // deterministic order. We could sort in any way, but we chose
1701 // case-insensitive sorting for consistency with the -help option
1702 // which prints out options in the case-insensitive alphabetical order.
1703 llvm::sort(SuggestedCompletions, [](StringRef A, StringRef B) {
1704 if (int X = A.compare_lower(B))
1705 return X < 0;
1706 return A.compare(B) > 0;
1707 });
1708
1709 llvm::outs() << llvm::join(SuggestedCompletions, "\n") << '\n';
1710}
1711
1712bool Driver::HandleImmediateArgs(const Compilation &C) {
1713 // The order these options are handled in gcc is all over the place, but we
1714 // don't expect inconsistencies w.r.t. that to matter in practice.
1715
1716 if (C.getArgs().hasArg(options::OPT_dumpmachine)) {
1717 llvm::outs() << C.getDefaultToolChain().getTripleString() << '\n';
1718 return false;
1719 }
1720
1721 if (C.getArgs().hasArg(options::OPT_dumpversion)) {
1722 // Since -dumpversion is only implemented for pedantic GCC compatibility, we
1723 // return an answer which matches our definition of __VERSION__.
1724 llvm::outs() << CLANG_VERSION_STRING"12.0.0" << "\n";
1725 return false;
1726 }
1727
1728 if (C.getArgs().hasArg(options::OPT__print_diagnostic_categories)) {
1729 PrintDiagnosticCategories(llvm::outs());
1730 return false;
1731 }
1732
1733 if (C.getArgs().hasArg(options::OPT_help) ||
1734 C.getArgs().hasArg(options::OPT__help_hidden)) {
1735 PrintHelp(C.getArgs().hasArg(options::OPT__help_hidden));
1736 return false;
1737 }
1738
1739 if (C.getArgs().hasArg(options::OPT__version)) {
1740 // Follow gcc behavior and use stdout for --version and stderr for -v.
1741 PrintVersion(C, llvm::outs());
1742 return false;
1743 }
1744
1745 if (C.getArgs().hasArg(options::OPT_v) ||
1746 C.getArgs().hasArg(options::OPT__HASH_HASH_HASH) ||
1747 C.getArgs().hasArg(options::OPT_print_supported_cpus)) {
1748 PrintVersion(C, llvm::errs());
1749 SuppressMissingInputWarning = true;
1750 }
1751
1752 if (C.getArgs().hasArg(options::OPT_v)) {
1753 if (!SystemConfigDir.empty())
1754 llvm::errs() << "System configuration file directory: "
1755 << SystemConfigDir << "\n";
1756 if (!UserConfigDir.empty())
1757 llvm::errs() << "User configuration file directory: "
1758 << UserConfigDir << "\n";
1759 }
1760
1761 const ToolChain &TC = C.getDefaultToolChain();
1762
1763 if (C.getArgs().hasArg(options::OPT_v))
1764 TC.printVerboseInfo(llvm::errs());
1765
1766 if (C.getArgs().hasArg(options::OPT_print_resource_dir)) {
1767 llvm::outs() << ResourceDir << '\n';
1768 return false;
1769 }
1770
1771 if (C.getArgs().hasArg(options::OPT_print_search_dirs)) {
1772 llvm::outs() << "programs: =";
1773 bool separator = false;
1774 // Print -B and COMPILER_PATH.
1775 for (const std::string &Path : PrefixDirs) {
1776 if (separator)
1777 llvm::outs() << llvm::sys::EnvPathSeparator;
1778 llvm::outs() << Path;
1779 separator = true;
1780 }
1781 for (const std::string &Path : TC.getProgramPaths()) {
1782 if (separator)
1783 llvm::outs() << llvm::sys::EnvPathSeparator;
1784 llvm::outs() << Path;
1785 separator = true;
1786 }
1787 llvm::outs() << "\n";
1788 llvm::outs() << "libraries: =" << ResourceDir;
1789
1790 StringRef sysroot = C.getSysRoot();
1791
1792 for (const std::string &Path : TC.getFilePaths()) {
1793 // Always print a separator. ResourceDir was the first item shown.
1794 llvm::outs() << llvm::sys::EnvPathSeparator;
1795 // Interpretation of leading '=' is needed only for NetBSD.
1796 if (Path[0] == '=')
1797 llvm::outs() << sysroot << Path.substr(1);
1798 else
1799 llvm::outs() << Path;
1800 }
1801 llvm::outs() << "\n";
1802 return false;
1803 }
1804
1805 // FIXME: The following handlers should use a callback mechanism, we don't
1806 // know what the client would like to do.
1807 if (Arg *A = C.getArgs().getLastArg(options::OPT_print_file_name_EQ)) {
1808 llvm::outs() << GetFilePath(A->getValue(), TC) << "\n";
1809 return false;
1810 }
1811
1812 if (Arg *A = C.getArgs().getLastArg(options::OPT_print_prog_name_EQ)) {
1813 StringRef ProgName = A->getValue();
1814
1815 // Null program name cannot have a path.
1816 if (! ProgName.empty())
1817 llvm::outs() << GetProgramPath(ProgName, TC);
1818
1819 llvm::outs() << "\n";
1820 return false;
1821 }
1822
1823 if (Arg *A = C.getArgs().getLastArg(options::OPT_autocomplete)) {
1824 StringRef PassedFlags = A->getValue();
1825 HandleAutocompletions(PassedFlags);
1826 return false;
1827 }
1828
1829 if (C.getArgs().hasArg(options::OPT_print_libgcc_file_name)) {
1830 ToolChain::RuntimeLibType RLT = TC.GetRuntimeLibType(C.getArgs());
1831 const llvm::Triple Triple(TC.ComputeEffectiveClangTriple(C.getArgs()));
1832 RegisterEffectiveTriple TripleRAII(TC, Triple);
1833 switch (RLT) {
1834 case ToolChain::RLT_CompilerRT:
1835 llvm::outs() << TC.getCompilerRT(C.getArgs(), "builtins") << "\n";
1836 break;
1837 case ToolChain::RLT_Libgcc:
1838 llvm::outs() << GetFilePath("libgcc.a", TC) << "\n";
1839 break;
1840 }
1841 return false;
1842 }
1843
1844 if (C.getArgs().hasArg(options::OPT_print_multi_lib)) {
1845 for (const Multilib &Multilib : TC.getMultilibs())
1846 llvm::outs() << Multilib << "\n";
1847 return false;
1848 }
1849
1850 if (C.getArgs().hasArg(options::OPT_print_multi_directory)) {
1851 const Multilib &Multilib = TC.getMultilib();
1852 if (Multilib.gccSuffix().empty())
1853 llvm::outs() << ".\n";
1854 else {
1855 StringRef Suffix(Multilib.gccSuffix());
1856 assert(Suffix.front() == '/')((Suffix.front() == '/') ? static_cast<void> (0) : __assert_fail
("Suffix.front() == '/'", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 1856, __PRETTY_FUNCTION__))
;
1857 llvm::outs() << Suffix.substr(1) << "\n";
1858 }
1859 return false;
1860 }
1861
1862 if (C.getArgs().hasArg(options::OPT_print_target_triple)) {
1863 llvm::outs() << TC.getTripleString() << "\n";
1864 return false;
1865 }
1866
1867 if (C.getArgs().hasArg(options::OPT_print_effective_triple)) {
1868 const llvm::Triple Triple(TC.ComputeEffectiveClangTriple(C.getArgs()));
1869 llvm::outs() << Triple.getTriple() << "\n";
1870 return false;
1871 }
1872
1873 if (C.getArgs().hasArg(options::OPT_print_targets)) {
1874 llvm::TargetRegistry::printRegisteredTargetsForVersion(llvm::outs());
1875 return false;
1876 }
1877
1878 return true;
1879}
1880
1881enum {
1882 TopLevelAction = 0,
1883 HeadSibAction = 1,
1884 OtherSibAction = 2,
1885};
1886
1887// Display an action graph human-readably. Action A is the "sink" node
1888// and latest-occuring action. Traversal is in pre-order, visiting the
1889// inputs to each action before printing the action itself.
1890static unsigned PrintActions1(const Compilation &C, Action *A,
1891 std::map<Action *, unsigned> &Ids,
1892 Twine Indent = {}, int Kind = TopLevelAction) {
1893 if (Ids.count(A)) // A was already visited.
1894 return Ids[A];
1895
1896 std::string str;
1897 llvm::raw_string_ostream os(str);
1898
1899 auto getSibIndent = [](int K) -> Twine {
1900 return (K == HeadSibAction) ? " " : (K == OtherSibAction) ? "| " : "";
1901 };
1902
1903 Twine SibIndent = Indent + getSibIndent(Kind);
1904 int SibKind = HeadSibAction;
1905 os << Action::getClassName(A->getKind()) << ", ";
1906 if (InputAction *IA = dyn_cast<InputAction>(A)) {
1907 os << "\"" << IA->getInputArg().getValue() << "\"";
1908 } else if (BindArchAction *BIA = dyn_cast<BindArchAction>(A)) {
1909 os << '"' << BIA->getArchName() << '"' << ", {"
1910 << PrintActions1(C, *BIA->input_begin(), Ids, SibIndent, SibKind) << "}";
1911 } else if (OffloadAction *OA = dyn_cast<OffloadAction>(A)) {
1912 bool IsFirst = true;
1913 OA->doOnEachDependence(
1914 [&](Action *A, const ToolChain *TC, const char *BoundArch) {
1915 assert(TC && "Unknown host toolchain")((TC && "Unknown host toolchain") ? static_cast<void
> (0) : __assert_fail ("TC && \"Unknown host toolchain\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 1915, __PRETTY_FUNCTION__))
;
1916 // E.g. for two CUDA device dependences whose bound arch is sm_20 and
1917 // sm_35 this will generate:
1918 // "cuda-device" (nvptx64-nvidia-cuda:sm_20) {#ID}, "cuda-device"
1919 // (nvptx64-nvidia-cuda:sm_35) {#ID}
1920 if (!IsFirst)
1921 os << ", ";
1922 os << '"';
1923 os << A->getOffloadingKindPrefix();
1924 os << " (";
1925 os << TC->getTriple().normalize();
1926 if (BoundArch)
1927 os << ":" << BoundArch;
1928 os << ")";
1929 os << '"';
1930 os << " {" << PrintActions1(C, A, Ids, SibIndent, SibKind) << "}";
1931 IsFirst = false;
1932 SibKind = OtherSibAction;
1933 });
1934 } else {
1935 const ActionList *AL = &A->getInputs();
1936
1937 if (AL->size()) {
1938 const char *Prefix = "{";
1939 for (Action *PreRequisite : *AL) {
1940 os << Prefix << PrintActions1(C, PreRequisite, Ids, SibIndent, SibKind);
1941 Prefix = ", ";
1942 SibKind = OtherSibAction;
1943 }
1944 os << "}";
1945 } else
1946 os << "{}";
1947 }
1948
1949 // Append offload info for all options other than the offloading action
1950 // itself (e.g. (cuda-device, sm_20) or (cuda-host)).
1951 std::string offload_str;
1952 llvm::raw_string_ostream offload_os(offload_str);
1953 if (!isa<OffloadAction>(A)) {
1954 auto S = A->getOffloadingKindPrefix();
1955 if (!S.empty()) {
1956 offload_os << ", (" << S;
1957 if (A->getOffloadingArch())
1958 offload_os << ", " << A->getOffloadingArch();
1959 offload_os << ")";
1960 }
1961 }
1962
1963 auto getSelfIndent = [](int K) -> Twine {
1964 return (K == HeadSibAction) ? "+- " : (K == OtherSibAction) ? "|- " : "";
1965 };
1966
1967 unsigned Id = Ids.size();
1968 Ids[A] = Id;
1969 llvm::errs() << Indent + getSelfIndent(Kind) << Id << ": " << os.str() << ", "
1970 << types::getTypeName(A->getType()) << offload_os.str() << "\n";
1971
1972 return Id;
1973}
1974
1975// Print the action graphs in a compilation C.
1976// For example "clang -c file1.c file2.c" is composed of two subgraphs.
1977void Driver::PrintActions(const Compilation &C) const {
1978 std::map<Action *, unsigned> Ids;
1979 for (Action *A : C.getActions())
1980 PrintActions1(C, A, Ids);
1981}
1982
1983/// Check whether the given input tree contains any compilation or
1984/// assembly actions.
1985static bool ContainsCompileOrAssembleAction(const Action *A) {
1986 if (isa<CompileJobAction>(A) || isa<BackendJobAction>(A) ||
1987 isa<AssembleJobAction>(A))
1988 return true;
1989
1990 for (const Action *Input : A->inputs())
1991 if (ContainsCompileOrAssembleAction(Input))
1992 return true;
1993
1994 return false;
1995}
1996
1997void Driver::BuildUniversalActions(Compilation &C, const ToolChain &TC,
1998 const InputList &BAInputs) const {
1999 DerivedArgList &Args = C.getArgs();
2000 ActionList &Actions = C.getActions();
2001 llvm::PrettyStackTraceString CrashInfo("Building universal build actions");
2002 // Collect the list of architectures. Duplicates are allowed, but should only
2003 // be handled once (in the order seen).
2004 llvm::StringSet<> ArchNames;
2005 SmallVector<const char *, 4> Archs;
2006 for (Arg *A : Args) {
2007 if (A->getOption().matches(options::OPT_arch)) {
2008 // Validate the option here; we don't save the type here because its
2009 // particular spelling may participate in other driver choices.
2010 llvm::Triple::ArchType Arch =
2011 tools::darwin::getArchTypeForMachOArchName(A->getValue());
2012 if (Arch == llvm::Triple::UnknownArch) {
2013 Diag(clang::diag::err_drv_invalid_arch_name) << A->getAsString(Args);
2014 continue;
2015 }
2016
2017 A->claim();
2018 if (ArchNames.insert(A->getValue()).second)
2019 Archs.push_back(A->getValue());
2020 }
2021 }
2022
2023 // When there is no explicit arch for this platform, make sure we still bind
2024 // the architecture (to the default) so that -Xarch_ is handled correctly.
2025 if (!Archs.size())
2026 Archs.push_back(Args.MakeArgString(TC.getDefaultUniversalArchName()));
2027
2028 ActionList SingleActions;
2029 BuildActions(C, Args, BAInputs, SingleActions);
2030
2031 // Add in arch bindings for every top level action, as well as lipo and
2032 // dsymutil steps if needed.
2033 for (Action* Act : SingleActions) {
2034 // Make sure we can lipo this kind of output. If not (and it is an actual
2035 // output) then we disallow, since we can't create an output file with the
2036 // right name without overwriting it. We could remove this oddity by just
2037 // changing the output names to include the arch, which would also fix
2038 // -save-temps. Compatibility wins for now.
2039
2040 if (Archs.size() > 1 && !types::canLipoType(Act->getType()))
2041 Diag(clang::diag::err_drv_invalid_output_with_multiple_archs)
2042 << types::getTypeName(Act->getType());
2043
2044 ActionList Inputs;
2045 for (unsigned i = 0, e = Archs.size(); i != e; ++i)
2046 Inputs.push_back(C.MakeAction<BindArchAction>(Act, Archs[i]));
2047
2048 // Lipo if necessary, we do it this way because we need to set the arch flag
2049 // so that -Xarch_ gets overwritten.
2050 if (Inputs.size() == 1 || Act->getType() == types::TY_Nothing)
2051 Actions.append(Inputs.begin(), Inputs.end());
2052 else
2053 Actions.push_back(C.MakeAction<LipoJobAction>(Inputs, Act->getType()));
2054
2055 // Handle debug info queries.
2056 Arg *A = Args.getLastArg(options::OPT_g_Group);
2057 bool enablesDebugInfo = A && !A->getOption().matches(options::OPT_g0) &&
2058 !A->getOption().matches(options::OPT_gstabs);
2059 if ((enablesDebugInfo || willEmitRemarks(Args)) &&
2060 ContainsCompileOrAssembleAction(Actions.back())) {
2061
2062 // Add a 'dsymutil' step if necessary, when debug info is enabled and we
2063 // have a compile input. We need to run 'dsymutil' ourselves in such cases
2064 // because the debug info will refer to a temporary object file which
2065 // will be removed at the end of the compilation process.
2066 if (Act->getType() == types::TY_Image) {
2067 ActionList Inputs;
2068 Inputs.push_back(Actions.back());
2069 Actions.pop_back();
2070 Actions.push_back(
2071 C.MakeAction<DsymutilJobAction>(Inputs, types::TY_dSYM));
2072 }
2073
2074 // Verify the debug info output.
2075 if (Args.hasArg(options::OPT_verify_debug_info)) {
2076 Action* LastAction = Actions.back();
2077 Actions.pop_back();
2078 Actions.push_back(C.MakeAction<VerifyDebugInfoJobAction>(
2079 LastAction, types::TY_Nothing));
2080 }
2081 }
2082 }
2083}
2084
2085bool Driver::DiagnoseInputExistence(const DerivedArgList &Args, StringRef Value,
2086 types::ID Ty, bool TypoCorrect) const {
2087 if (!getCheckInputsExist())
2088 return true;
2089
2090 // stdin always exists.
2091 if (Value == "-")
2092 return true;
2093
2094 if (getVFS().exists(Value))
2095 return true;
2096
2097 if (IsCLMode()) {
2098 if (!llvm::sys::path::is_absolute(Twine(Value)) &&
2099 llvm::sys::Process::FindInEnvPath("LIB", Value, ';'))
2100 return true;
2101
2102 if (Args.hasArg(options::OPT__SLASH_link) && Ty == types::TY_Object) {
2103 // Arguments to the /link flag might cause the linker to search for object
2104 // and library files in paths we don't know about. Don't error in such
2105 // cases.
2106 return true;
2107 }
2108 }
2109
2110 if (TypoCorrect) {
2111 // Check if the filename is a typo for an option flag. OptTable thinks
2112 // that all args that are not known options and that start with / are
2113 // filenames, but e.g. `/diagnostic:caret` is more likely a typo for
2114 // the option `/diagnostics:caret` than a reference to a file in the root
2115 // directory.
2116 unsigned IncludedFlagsBitmask;
2117 unsigned ExcludedFlagsBitmask;
2118 std::tie(IncludedFlagsBitmask, ExcludedFlagsBitmask) =
2119 getIncludeExcludeOptionFlagMasks(IsCLMode());
2120 std::string Nearest;
2121 if (getOpts().findNearest(Value, Nearest, IncludedFlagsBitmask,
2122 ExcludedFlagsBitmask) <= 1) {
2123 Diag(clang::diag::err_drv_no_such_file_with_suggestion)
2124 << Value << Nearest;
2125 return false;
2126 }
2127 }
2128
2129 Diag(clang::diag::err_drv_no_such_file) << Value;
2130 return false;
2131}
2132
2133// Construct a the list of inputs and their types.
2134void Driver::BuildInputs(const ToolChain &TC, DerivedArgList &Args,
2135 InputList &Inputs) const {
2136 const llvm::opt::OptTable &Opts = getOpts();
2137 // Track the current user specified (-x) input. We also explicitly track the
2138 // argument used to set the type; we only want to claim the type when we
2139 // actually use it, so we warn about unused -x arguments.
2140 types::ID InputType = types::TY_Nothing;
2141 Arg *InputTypeArg = nullptr;
2142
2143 // The last /TC or /TP option sets the input type to C or C++ globally.
2144 if (Arg *TCTP = Args.getLastArgNoClaim(options::OPT__SLASH_TC,
2145 options::OPT__SLASH_TP)) {
2146 InputTypeArg = TCTP;
2147 InputType = TCTP->getOption().matches(options::OPT__SLASH_TC)
2148 ? types::TY_C
2149 : types::TY_CXX;
2150
2151 Arg *Previous = nullptr;
2152 bool ShowNote = false;
2153 for (Arg *A :
2154 Args.filtered(options::OPT__SLASH_TC, options::OPT__SLASH_TP)) {
2155 if (Previous) {
2156 Diag(clang::diag::warn_drv_overriding_flag_option)
2157 << Previous->getSpelling() << A->getSpelling();
2158 ShowNote = true;
2159 }
2160 Previous = A;
2161 }
2162 if (ShowNote)
2163 Diag(clang::diag::note_drv_t_option_is_global);
2164
2165 // No driver mode exposes -x and /TC or /TP; we don't support mixing them.
2166 assert(!Args.hasArg(options::OPT_x) && "-x and /TC or /TP is not allowed")((!Args.hasArg(options::OPT_x) && "-x and /TC or /TP is not allowed"
) ? static_cast<void> (0) : __assert_fail ("!Args.hasArg(options::OPT_x) && \"-x and /TC or /TP is not allowed\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2166, __PRETTY_FUNCTION__))
;
2167 }
2168
2169 for (Arg *A : Args) {
2170 if (A->getOption().getKind() == Option::InputClass) {
2171 const char *Value = A->getValue();
2172 types::ID Ty = types::TY_INVALID;
2173
2174 // Infer the input type if necessary.
2175 if (InputType == types::TY_Nothing) {
2176 // If there was an explicit arg for this, claim it.
2177 if (InputTypeArg)
2178 InputTypeArg->claim();
2179
2180 // stdin must be handled specially.
2181 if (memcmp(Value, "-", 2) == 0) {
2182 // If running with -E, treat as a C input (this changes the builtin
2183 // macros, for example). This may be overridden by -ObjC below.
2184 //
2185 // Otherwise emit an error but still use a valid type to avoid
2186 // spurious errors (e.g., no inputs).
2187 if (!Args.hasArgNoClaim(options::OPT_E) && !CCCIsCPP())
2188 Diag(IsCLMode() ? clang::diag::err_drv_unknown_stdin_type_clang_cl
2189 : clang::diag::err_drv_unknown_stdin_type);
2190 Ty = types::TY_C;
2191 } else {
2192 // Otherwise lookup by extension.
2193 // Fallback is C if invoked as C preprocessor, C++ if invoked with
2194 // clang-cl /E, or Object otherwise.
2195 // We use a host hook here because Darwin at least has its own
2196 // idea of what .s is.
2197 if (const char *Ext = strrchr(Value, '.'))
2198 Ty = TC.LookupTypeForExtension(Ext + 1);
2199
2200 if (Ty == types::TY_INVALID) {
2201 if (CCCIsCPP())
2202 Ty = types::TY_C;
2203 else if (IsCLMode() && Args.hasArgNoClaim(options::OPT_E))
2204 Ty = types::TY_CXX;
2205 else
2206 Ty = types::TY_Object;
2207 }
2208
2209 // If the driver is invoked as C++ compiler (like clang++ or c++) it
2210 // should autodetect some input files as C++ for g++ compatibility.
2211 if (CCCIsCXX()) {
2212 types::ID OldTy = Ty;
2213 Ty = types::lookupCXXTypeForCType(Ty);
2214
2215 if (Ty != OldTy)
2216 Diag(clang::diag::warn_drv_treating_input_as_cxx)
2217 << getTypeName(OldTy) << getTypeName(Ty);
2218 }
2219
2220 // If running with -fthinlto-index=, extensions that normally identify
2221 // native object files actually identify LLVM bitcode files.
2222 if (Args.hasArgNoClaim(options::OPT_fthinlto_index_EQ) &&
2223 Ty == types::TY_Object)
2224 Ty = types::TY_LLVM_BC;
2225 }
2226
2227 // -ObjC and -ObjC++ override the default language, but only for "source
2228 // files". We just treat everything that isn't a linker input as a
2229 // source file.
2230 //
2231 // FIXME: Clean this up if we move the phase sequence into the type.
2232 if (Ty != types::TY_Object) {
2233 if (Args.hasArg(options::OPT_ObjC))
2234 Ty = types::TY_ObjC;
2235 else if (Args.hasArg(options::OPT_ObjCXX))
2236 Ty = types::TY_ObjCXX;
2237 }
2238 } else {
2239 assert(InputTypeArg && "InputType set w/o InputTypeArg")((InputTypeArg && "InputType set w/o InputTypeArg") ?
static_cast<void> (0) : __assert_fail ("InputTypeArg && \"InputType set w/o InputTypeArg\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2239, __PRETTY_FUNCTION__))
;
2240 if (!InputTypeArg->getOption().matches(options::OPT_x)) {
2241 // If emulating cl.exe, make sure that /TC and /TP don't affect input
2242 // object files.
2243 const char *Ext = strrchr(Value, '.');
2244 if (Ext && TC.LookupTypeForExtension(Ext + 1) == types::TY_Object)
2245 Ty = types::TY_Object;
2246 }
2247 if (Ty == types::TY_INVALID) {
2248 Ty = InputType;
2249 InputTypeArg->claim();
2250 }
2251 }
2252
2253 if (DiagnoseInputExistence(Args, Value, Ty, /*TypoCorrect=*/true))
2254 Inputs.push_back(std::make_pair(Ty, A));
2255
2256 } else if (A->getOption().matches(options::OPT__SLASH_Tc)) {
2257 StringRef Value = A->getValue();
2258 if (DiagnoseInputExistence(Args, Value, types::TY_C,
2259 /*TypoCorrect=*/false)) {
2260 Arg *InputArg = MakeInputArg(Args, Opts, A->getValue());
2261 Inputs.push_back(std::make_pair(types::TY_C, InputArg));
2262 }
2263 A->claim();
2264 } else if (A->getOption().matches(options::OPT__SLASH_Tp)) {
2265 StringRef Value = A->getValue();
2266 if (DiagnoseInputExistence(Args, Value, types::TY_CXX,
2267 /*TypoCorrect=*/false)) {
2268 Arg *InputArg = MakeInputArg(Args, Opts, A->getValue());
2269 Inputs.push_back(std::make_pair(types::TY_CXX, InputArg));
2270 }
2271 A->claim();
2272 } else if (A->getOption().hasFlag(options::LinkerInput)) {
2273 // Just treat as object type, we could make a special type for this if
2274 // necessary.
2275 Inputs.push_back(std::make_pair(types::TY_Object, A));
2276
2277 } else if (A->getOption().matches(options::OPT_x)) {
2278 InputTypeArg = A;
2279 InputType = types::lookupTypeForTypeSpecifier(A->getValue());
2280 A->claim();
2281
2282 // Follow gcc behavior and treat as linker input for invalid -x
2283 // options. Its not clear why we shouldn't just revert to unknown; but
2284 // this isn't very important, we might as well be bug compatible.
2285 if (!InputType) {
2286 Diag(clang::diag::err_drv_unknown_language) << A->getValue();
2287 InputType = types::TY_Object;
2288 }
2289 } else if (A->getOption().getID() == options::OPT_U) {
2290 assert(A->getNumValues() == 1 && "The /U option has one value.")((A->getNumValues() == 1 && "The /U option has one value."
) ? static_cast<void> (0) : __assert_fail ("A->getNumValues() == 1 && \"The /U option has one value.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2290, __PRETTY_FUNCTION__))
;
2291 StringRef Val = A->getValue(0);
2292 if (Val.find_first_of("/\\") != StringRef::npos) {
2293 // Warn about e.g. "/Users/me/myfile.c".
2294 Diag(diag::warn_slash_u_filename) << Val;
2295 Diag(diag::note_use_dashdash);
2296 }
2297 }
2298 }
2299 if (CCCIsCPP() && Inputs.empty()) {
2300 // If called as standalone preprocessor, stdin is processed
2301 // if no other input is present.
2302 Arg *A = MakeInputArg(Args, Opts, "-");
2303 Inputs.push_back(std::make_pair(types::TY_C, A));
2304 }
2305}
2306
2307namespace {
2308/// Provides a convenient interface for different programming models to generate
2309/// the required device actions.
2310class OffloadingActionBuilder final {
2311 /// Flag used to trace errors in the builder.
2312 bool IsValid = false;
2313
2314 /// The compilation that is using this builder.
2315 Compilation &C;
2316
2317 /// Map between an input argument and the offload kinds used to process it.
2318 std::map<const Arg *, unsigned> InputArgToOffloadKindMap;
2319
2320 /// Builder interface. It doesn't build anything or keep any state.
2321 class DeviceActionBuilder {
2322 public:
2323 typedef const llvm::SmallVectorImpl<phases::ID> PhasesTy;
2324
2325 enum ActionBuilderReturnCode {
2326 // The builder acted successfully on the current action.
2327 ABRT_Success,
2328 // The builder didn't have to act on the current action.
2329 ABRT_Inactive,
2330 // The builder was successful and requested the host action to not be
2331 // generated.
2332 ABRT_Ignore_Host,
2333 };
2334
2335 protected:
2336 /// Compilation associated with this builder.
2337 Compilation &C;
2338
2339 /// Tool chains associated with this builder. The same programming
2340 /// model may have associated one or more tool chains.
2341 SmallVector<const ToolChain *, 2> ToolChains;
2342
2343 /// The derived arguments associated with this builder.
2344 DerivedArgList &Args;
2345
2346 /// The inputs associated with this builder.
2347 const Driver::InputList &Inputs;
2348
2349 /// The associated offload kind.
2350 Action::OffloadKind AssociatedOffloadKind = Action::OFK_None;
2351
2352 public:
2353 DeviceActionBuilder(Compilation &C, DerivedArgList &Args,
2354 const Driver::InputList &Inputs,
2355 Action::OffloadKind AssociatedOffloadKind)
2356 : C(C), Args(Args), Inputs(Inputs),
2357 AssociatedOffloadKind(AssociatedOffloadKind) {}
2358 virtual ~DeviceActionBuilder() {}
2359
2360 /// Fill up the array \a DA with all the device dependences that should be
2361 /// added to the provided host action \a HostAction. By default it is
2362 /// inactive.
2363 virtual ActionBuilderReturnCode
2364 getDeviceDependences(OffloadAction::DeviceDependences &DA,
2365 phases::ID CurPhase, phases::ID FinalPhase,
2366 PhasesTy &Phases) {
2367 return ABRT_Inactive;
2368 }
2369
2370 /// Update the state to include the provided host action \a HostAction as a
2371 /// dependency of the current device action. By default it is inactive.
2372 virtual ActionBuilderReturnCode addDeviceDepences(Action *HostAction) {
2373 return ABRT_Inactive;
2374 }
2375
2376 /// Append top level actions generated by the builder.
2377 virtual void appendTopLevelActions(ActionList &AL) {}
2378
2379 /// Append linker device actions generated by the builder.
2380 virtual void appendLinkDeviceActions(ActionList &AL) {}
2381
2382 /// Append linker host action generated by the builder.
2383 virtual Action* appendLinkHostActions(ActionList &AL) { return nullptr; }
2384
2385 /// Append linker actions generated by the builder.
2386 virtual void appendLinkDependences(OffloadAction::DeviceDependences &DA) {}
2387
2388 /// Initialize the builder. Return true if any initialization errors are
2389 /// found.
2390 virtual bool initialize() { return false; }
2391
2392 /// Return true if the builder can use bundling/unbundling.
2393 virtual bool canUseBundlerUnbundler() const { return false; }
2394
2395 /// Return true if this builder is valid. We have a valid builder if we have
2396 /// associated device tool chains.
2397 bool isValid() { return !ToolChains.empty(); }
2398
2399 /// Return the associated offload kind.
2400 Action::OffloadKind getAssociatedOffloadKind() {
2401 return AssociatedOffloadKind;
2402 }
2403 };
2404
2405 /// Base class for CUDA/HIP action builder. It injects device code in
2406 /// the host backend action.
2407 class CudaActionBuilderBase : public DeviceActionBuilder {
2408 protected:
2409 /// Flags to signal if the user requested host-only or device-only
2410 /// compilation.
2411 bool CompileHostOnly = false;
2412 bool CompileDeviceOnly = false;
2413 bool EmitLLVM = false;
2414 bool EmitAsm = false;
2415
2416 /// ID to identify each device compilation. For CUDA it is simply the
2417 /// GPU arch string. For HIP it is either the GPU arch string or GPU
2418 /// arch string plus feature strings delimited by a plus sign, e.g.
2419 /// gfx906+xnack.
2420 struct TargetID {
2421 /// Target ID string which is persistent throughout the compilation.
2422 const char *ID;
2423 TargetID(CudaArch Arch) { ID = CudaArchToString(Arch); }
2424 TargetID(const char *ID) : ID(ID) {}
2425 operator const char *() { return ID; }
2426 operator StringRef() { return StringRef(ID); }
2427 };
2428 /// List of GPU architectures to use in this compilation.
2429 SmallVector<TargetID, 4> GpuArchList;
2430
2431 /// The CUDA actions for the current input.
2432 ActionList CudaDeviceActions;
2433
2434 /// The CUDA fat binary if it was generated for the current input.
2435 Action *CudaFatBinary = nullptr;
2436
2437 /// Flag that is set to true if this builder acted on the current input.
2438 bool IsActive = false;
2439
2440 /// Flag for -fgpu-rdc.
2441 bool Relocatable = false;
2442
2443 /// Default GPU architecture if there's no one specified.
2444 CudaArch DefaultCudaArch = CudaArch::UNKNOWN;
2445
2446 public:
2447 CudaActionBuilderBase(Compilation &C, DerivedArgList &Args,
2448 const Driver::InputList &Inputs,
2449 Action::OffloadKind OFKind)
2450 : DeviceActionBuilder(C, Args, Inputs, OFKind) {}
2451
2452 ActionBuilderReturnCode addDeviceDepences(Action *HostAction) override {
2453 // While generating code for CUDA, we only depend on the host input action
2454 // to trigger the creation of all the CUDA device actions.
2455
2456 // If we are dealing with an input action, replicate it for each GPU
2457 // architecture. If we are in host-only mode we return 'success' so that
2458 // the host uses the CUDA offload kind.
2459 if (auto *IA = dyn_cast<InputAction>(HostAction)) {
2460 assert(!GpuArchList.empty() &&((!GpuArchList.empty() && "We should have at least one GPU architecture."
) ? static_cast<void> (0) : __assert_fail ("!GpuArchList.empty() && \"We should have at least one GPU architecture.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2461, __PRETTY_FUNCTION__))
2461 "We should have at least one GPU architecture.")((!GpuArchList.empty() && "We should have at least one GPU architecture."
) ? static_cast<void> (0) : __assert_fail ("!GpuArchList.empty() && \"We should have at least one GPU architecture.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2461, __PRETTY_FUNCTION__))
;
2462
2463 // If the host input is not CUDA or HIP, we don't need to bother about
2464 // this input.
2465 if (!(IA->getType() == types::TY_CUDA ||
2466 IA->getType() == types::TY_HIP ||
2467 IA->getType() == types::TY_PP_HIP)) {
2468 // The builder will ignore this input.
2469 IsActive = false;
2470 return ABRT_Inactive;
2471 }
2472
2473 // Set the flag to true, so that the builder acts on the current input.
2474 IsActive = true;
2475
2476 if (CompileHostOnly)
2477 return ABRT_Success;
2478
2479 // Replicate inputs for each GPU architecture.
2480 auto Ty = IA->getType() == types::TY_HIP ? types::TY_HIP_DEVICE
2481 : types::TY_CUDA_DEVICE;
2482 for (unsigned I = 0, E = GpuArchList.size(); I != E; ++I) {
2483 CudaDeviceActions.push_back(
2484 C.MakeAction<InputAction>(IA->getInputArg(), Ty));
2485 }
2486
2487 return ABRT_Success;
2488 }
2489
2490 // If this is an unbundling action use it as is for each CUDA toolchain.
2491 if (auto *UA = dyn_cast<OffloadUnbundlingJobAction>(HostAction)) {
2492
2493 // If -fgpu-rdc is disabled, should not unbundle since there is no
2494 // device code to link.
2495 if (UA->getType() == types::TY_Object && !Relocatable)
2496 return ABRT_Inactive;
2497
2498 CudaDeviceActions.clear();
2499 auto *IA = cast<InputAction>(UA->getInputs().back());
2500 std::string FileName = IA->getInputArg().getAsString(Args);
2501 // Check if the type of the file is the same as the action. Do not
2502 // unbundle it if it is not. Do not unbundle .so files, for example,
2503 // which are not object files.
2504 if (IA->getType() == types::TY_Object &&
2505 (!llvm::sys::path::has_extension(FileName) ||
2506 types::lookupTypeForExtension(
2507 llvm::sys::path::extension(FileName).drop_front()) !=
2508 types::TY_Object))
2509 return ABRT_Inactive;
2510
2511 for (auto Arch : GpuArchList) {
2512 CudaDeviceActions.push_back(UA);
2513 UA->registerDependentActionInfo(ToolChains[0], Arch,
2514 AssociatedOffloadKind);
2515 }
2516 return ABRT_Success;
2517 }
2518
2519 return IsActive ? ABRT_Success : ABRT_Inactive;
2520 }
2521
2522 void appendTopLevelActions(ActionList &AL) override {
2523 // Utility to append actions to the top level list.
2524 auto AddTopLevel = [&](Action *A, TargetID TargetID) {
2525 OffloadAction::DeviceDependences Dep;
2526 Dep.add(*A, *ToolChains.front(), TargetID, AssociatedOffloadKind);
2527 AL.push_back(C.MakeAction<OffloadAction>(Dep, A->getType()));
2528 };
2529
2530 // If we have a fat binary, add it to the list.
2531 if (CudaFatBinary) {
2532 AddTopLevel(CudaFatBinary, CudaArch::UNUSED);
2533 CudaDeviceActions.clear();
2534 CudaFatBinary = nullptr;
2535 return;
2536 }
2537
2538 if (CudaDeviceActions.empty())
2539 return;
2540
2541 // If we have CUDA actions at this point, that's because we have a have
2542 // partial compilation, so we should have an action for each GPU
2543 // architecture.
2544 assert(CudaDeviceActions.size() == GpuArchList.size() &&((CudaDeviceActions.size() == GpuArchList.size() && "Expecting one action per GPU architecture."
) ? static_cast<void> (0) : __assert_fail ("CudaDeviceActions.size() == GpuArchList.size() && \"Expecting one action per GPU architecture.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2545, __PRETTY_FUNCTION__))
2545 "Expecting one action per GPU architecture.")((CudaDeviceActions.size() == GpuArchList.size() && "Expecting one action per GPU architecture."
) ? static_cast<void> (0) : __assert_fail ("CudaDeviceActions.size() == GpuArchList.size() && \"Expecting one action per GPU architecture.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2545, __PRETTY_FUNCTION__))
;
2546 assert(ToolChains.size() == 1 &&((ToolChains.size() == 1 && "Expecting to have a sing CUDA toolchain."
) ? static_cast<void> (0) : __assert_fail ("ToolChains.size() == 1 && \"Expecting to have a sing CUDA toolchain.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2547, __PRETTY_FUNCTION__))
2547 "Expecting to have a sing CUDA toolchain.")((ToolChains.size() == 1 && "Expecting to have a sing CUDA toolchain."
) ? static_cast<void> (0) : __assert_fail ("ToolChains.size() == 1 && \"Expecting to have a sing CUDA toolchain.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2547, __PRETTY_FUNCTION__))
;
2548 for (unsigned I = 0, E = GpuArchList.size(); I != E; ++I)
2549 AddTopLevel(CudaDeviceActions[I], GpuArchList[I]);
2550
2551 CudaDeviceActions.clear();
2552 }
2553
2554 /// Get canonicalized offload arch option. \returns empty StringRef if the
2555 /// option is invalid.
2556 virtual StringRef getCanonicalOffloadArch(StringRef Arch) = 0;
2557
2558 virtual llvm::Optional<std::pair<llvm::StringRef, llvm::StringRef>>
2559 getConflictOffloadArchCombination(const std::set<StringRef> &GpuArchs) = 0;
2560
2561 bool initialize() override {
2562 assert(AssociatedOffloadKind == Action::OFK_Cuda ||((AssociatedOffloadKind == Action::OFK_Cuda || AssociatedOffloadKind
== Action::OFK_HIP) ? static_cast<void> (0) : __assert_fail
("AssociatedOffloadKind == Action::OFK_Cuda || AssociatedOffloadKind == Action::OFK_HIP"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2563, __PRETTY_FUNCTION__))
2563 AssociatedOffloadKind == Action::OFK_HIP)((AssociatedOffloadKind == Action::OFK_Cuda || AssociatedOffloadKind
== Action::OFK_HIP) ? static_cast<void> (0) : __assert_fail
("AssociatedOffloadKind == Action::OFK_Cuda || AssociatedOffloadKind == Action::OFK_HIP"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2563, __PRETTY_FUNCTION__))
;
2564
2565 // We don't need to support CUDA.
2566 if (AssociatedOffloadKind == Action::OFK_Cuda &&
2567 !C.hasOffloadToolChain<Action::OFK_Cuda>())
2568 return false;
2569
2570 // We don't need to support HIP.
2571 if (AssociatedOffloadKind == Action::OFK_HIP &&
2572 !C.hasOffloadToolChain<Action::OFK_HIP>())
2573 return false;
2574
2575 Relocatable = Args.hasFlag(options::OPT_fgpu_rdc,
2576 options::OPT_fno_gpu_rdc, /*Default=*/false);
2577
2578 const ToolChain *HostTC = C.getSingleOffloadToolChain<Action::OFK_Host>();
2579 assert(HostTC && "No toolchain for host compilation.")((HostTC && "No toolchain for host compilation.") ? static_cast
<void> (0) : __assert_fail ("HostTC && \"No toolchain for host compilation.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2579, __PRETTY_FUNCTION__))
;
2580 if (HostTC->getTriple().isNVPTX() ||
2581 HostTC->getTriple().getArch() == llvm::Triple::amdgcn) {
2582 // We do not support targeting NVPTX/AMDGCN for host compilation. Throw
2583 // an error and abort pipeline construction early so we don't trip
2584 // asserts that assume device-side compilation.
2585 C.getDriver().Diag(diag::err_drv_cuda_host_arch)
2586 << HostTC->getTriple().getArchName();
2587 return true;
2588 }
2589
2590 ToolChains.push_back(
2591 AssociatedOffloadKind == Action::OFK_Cuda
2592 ? C.getSingleOffloadToolChain<Action::OFK_Cuda>()
2593 : C.getSingleOffloadToolChain<Action::OFK_HIP>());
2594
2595 Arg *PartialCompilationArg = Args.getLastArg(
2596 options::OPT_cuda_host_only, options::OPT_cuda_device_only,
2597 options::OPT_cuda_compile_host_device);
2598 CompileHostOnly = PartialCompilationArg &&
2599 PartialCompilationArg->getOption().matches(
2600 options::OPT_cuda_host_only);
2601 CompileDeviceOnly = PartialCompilationArg &&
2602 PartialCompilationArg->getOption().matches(
2603 options::OPT_cuda_device_only);
2604 EmitLLVM = Args.getLastArg(options::OPT_emit_llvm);
2605 EmitAsm = Args.getLastArg(options::OPT_S);
2606
2607 // Collect all cuda_gpu_arch parameters, removing duplicates.
2608 std::set<StringRef> GpuArchs;
2609 bool Error = false;
2610 for (Arg *A : Args) {
2611 if (!(A->getOption().matches(options::OPT_offload_arch_EQ) ||
2612 A->getOption().matches(options::OPT_no_offload_arch_EQ)))
2613 continue;
2614 A->claim();
2615
2616 StringRef ArchStr = A->getValue();
2617 if (A->getOption().matches(options::OPT_no_offload_arch_EQ) &&
2618 ArchStr == "all") {
2619 GpuArchs.clear();
2620 continue;
2621 }
2622 ArchStr = getCanonicalOffloadArch(ArchStr);
2623 if (ArchStr.empty()) {
2624 Error = true;
2625 } else if (A->getOption().matches(options::OPT_offload_arch_EQ))
2626 GpuArchs.insert(ArchStr);
2627 else if (A->getOption().matches(options::OPT_no_offload_arch_EQ))
2628 GpuArchs.erase(ArchStr);
2629 else
2630 llvm_unreachable("Unexpected option.")::llvm::llvm_unreachable_internal("Unexpected option.", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2630)
;
2631 }
2632
2633 auto &&ConflictingArchs = getConflictOffloadArchCombination(GpuArchs);
2634 if (ConflictingArchs) {
2635 C.getDriver().Diag(clang::diag::err_drv_bad_offload_arch_combo)
2636 << ConflictingArchs.getValue().first
2637 << ConflictingArchs.getValue().second;
2638 C.setContainsError();
2639 return true;
2640 }
2641
2642 // Collect list of GPUs remaining in the set.
2643 for (auto Arch : GpuArchs)
2644 GpuArchList.push_back(Arch.data());
2645
2646 // Default to sm_20 which is the lowest common denominator for
2647 // supported GPUs. sm_20 code should work correctly, if
2648 // suboptimally, on all newer GPUs.
2649 if (GpuArchList.empty())
2650 GpuArchList.push_back(DefaultCudaArch);
2651
2652 return Error;
2653 }
2654 };
2655
2656 /// \brief CUDA action builder. It injects device code in the host backend
2657 /// action.
2658 class CudaActionBuilder final : public CudaActionBuilderBase {
2659 public:
2660 CudaActionBuilder(Compilation &C, DerivedArgList &Args,
2661 const Driver::InputList &Inputs)
2662 : CudaActionBuilderBase(C, Args, Inputs, Action::OFK_Cuda) {
2663 DefaultCudaArch = CudaArch::SM_20;
2664 }
2665
2666 StringRef getCanonicalOffloadArch(StringRef ArchStr) override {
2667 CudaArch Arch = StringToCudaArch(ArchStr);
2668 if (Arch == CudaArch::UNKNOWN) {
2669 C.getDriver().Diag(clang::diag::err_drv_cuda_bad_gpu_arch) << ArchStr;
2670 return StringRef();
2671 }
2672 return CudaArchToString(Arch);
2673 }
2674
2675 llvm::Optional<std::pair<llvm::StringRef, llvm::StringRef>>
2676 getConflictOffloadArchCombination(
2677 const std::set<StringRef> &GpuArchs) override {
2678 return llvm::None;
2679 }
2680
2681 ActionBuilderReturnCode
2682 getDeviceDependences(OffloadAction::DeviceDependences &DA,
2683 phases::ID CurPhase, phases::ID FinalPhase,
2684 PhasesTy &Phases) override {
2685 if (!IsActive)
2686 return ABRT_Inactive;
2687
2688 // If we don't have more CUDA actions, we don't have any dependences to
2689 // create for the host.
2690 if (CudaDeviceActions.empty())
2691 return ABRT_Success;
2692
2693 assert(CudaDeviceActions.size() == GpuArchList.size() &&((CudaDeviceActions.size() == GpuArchList.size() && "Expecting one action per GPU architecture."
) ? static_cast<void> (0) : __assert_fail ("CudaDeviceActions.size() == GpuArchList.size() && \"Expecting one action per GPU architecture.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2694, __PRETTY_FUNCTION__))
2694 "Expecting one action per GPU architecture.")((CudaDeviceActions.size() == GpuArchList.size() && "Expecting one action per GPU architecture."
) ? static_cast<void> (0) : __assert_fail ("CudaDeviceActions.size() == GpuArchList.size() && \"Expecting one action per GPU architecture.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2694, __PRETTY_FUNCTION__))
;
2695 assert(!CompileHostOnly &&((!CompileHostOnly && "Not expecting CUDA actions in host-only compilation."
) ? static_cast<void> (0) : __assert_fail ("!CompileHostOnly && \"Not expecting CUDA actions in host-only compilation.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2696, __PRETTY_FUNCTION__))
2696 "Not expecting CUDA actions in host-only compilation.")((!CompileHostOnly && "Not expecting CUDA actions in host-only compilation."
) ? static_cast<void> (0) : __assert_fail ("!CompileHostOnly && \"Not expecting CUDA actions in host-only compilation.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2696, __PRETTY_FUNCTION__))
;
2697
2698 // If we are generating code for the device or we are in a backend phase,
2699 // we attempt to generate the fat binary. We compile each arch to ptx and
2700 // assemble to cubin, then feed the cubin *and* the ptx into a device
2701 // "link" action, which uses fatbinary to combine these cubins into one
2702 // fatbin. The fatbin is then an input to the host action if not in
2703 // device-only mode.
2704 if (CompileDeviceOnly || CurPhase == phases::Backend) {
2705 ActionList DeviceActions;
2706 for (unsigned I = 0, E = GpuArchList.size(); I != E; ++I) {
2707 // Produce the device action from the current phase up to the assemble
2708 // phase.
2709 for (auto Ph : Phases) {
2710 // Skip the phases that were already dealt with.
2711 if (Ph < CurPhase)
2712 continue;
2713 // We have to be consistent with the host final phase.
2714 if (Ph > FinalPhase)
2715 break;
2716
2717 CudaDeviceActions[I] = C.getDriver().ConstructPhaseAction(
2718 C, Args, Ph, CudaDeviceActions[I], Action::OFK_Cuda);
2719
2720 if (Ph == phases::Assemble)
2721 break;
2722 }
2723
2724 // If we didn't reach the assemble phase, we can't generate the fat
2725 // binary. We don't need to generate the fat binary if we are not in
2726 // device-only mode.
2727 if (!isa<AssembleJobAction>(CudaDeviceActions[I]) ||
2728 CompileDeviceOnly)
2729 continue;
2730
2731 Action *AssembleAction = CudaDeviceActions[I];
2732 assert(AssembleAction->getType() == types::TY_Object)((AssembleAction->getType() == types::TY_Object) ? static_cast
<void> (0) : __assert_fail ("AssembleAction->getType() == types::TY_Object"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2732, __PRETTY_FUNCTION__))
;
2733 assert(AssembleAction->getInputs().size() == 1)((AssembleAction->getInputs().size() == 1) ? static_cast<
void> (0) : __assert_fail ("AssembleAction->getInputs().size() == 1"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2733, __PRETTY_FUNCTION__))
;
2734
2735 Action *BackendAction = AssembleAction->getInputs()[0];
2736 assert(BackendAction->getType() == types::TY_PP_Asm)((BackendAction->getType() == types::TY_PP_Asm) ? static_cast
<void> (0) : __assert_fail ("BackendAction->getType() == types::TY_PP_Asm"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2736, __PRETTY_FUNCTION__))
;
2737
2738 for (auto &A : {AssembleAction, BackendAction}) {
2739 OffloadAction::DeviceDependences DDep;
2740 DDep.add(*A, *ToolChains.front(), GpuArchList[I], Action::OFK_Cuda);
2741 DeviceActions.push_back(
2742 C.MakeAction<OffloadAction>(DDep, A->getType()));
2743 }
2744 }
2745
2746 // We generate the fat binary if we have device input actions.
2747 if (!DeviceActions.empty()) {
2748 CudaFatBinary =
2749 C.MakeAction<LinkJobAction>(DeviceActions, types::TY_CUDA_FATBIN);
2750
2751 if (!CompileDeviceOnly) {
2752 DA.add(*CudaFatBinary, *ToolChains.front(), /*BoundArch=*/nullptr,
2753 Action::OFK_Cuda);
2754 // Clear the fat binary, it is already a dependence to an host
2755 // action.
2756 CudaFatBinary = nullptr;
2757 }
2758
2759 // Remove the CUDA actions as they are already connected to an host
2760 // action or fat binary.
2761 CudaDeviceActions.clear();
2762 }
2763
2764 // We avoid creating host action in device-only mode.
2765 return CompileDeviceOnly ? ABRT_Ignore_Host : ABRT_Success;
2766 } else if (CurPhase > phases::Backend) {
2767 // If we are past the backend phase and still have a device action, we
2768 // don't have to do anything as this action is already a device
2769 // top-level action.
2770 return ABRT_Success;
2771 }
2772
2773 assert(CurPhase < phases::Backend && "Generating single CUDA "((CurPhase < phases::Backend && "Generating single CUDA "
"instructions should only occur " "before the backend phase!"
) ? static_cast<void> (0) : __assert_fail ("CurPhase < phases::Backend && \"Generating single CUDA \" \"instructions should only occur \" \"before the backend phase!\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2775, __PRETTY_FUNCTION__))
2774 "instructions should only occur "((CurPhase < phases::Backend && "Generating single CUDA "
"instructions should only occur " "before the backend phase!"
) ? static_cast<void> (0) : __assert_fail ("CurPhase < phases::Backend && \"Generating single CUDA \" \"instructions should only occur \" \"before the backend phase!\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2775, __PRETTY_FUNCTION__))
2775 "before the backend phase!")((CurPhase < phases::Backend && "Generating single CUDA "
"instructions should only occur " "before the backend phase!"
) ? static_cast<void> (0) : __assert_fail ("CurPhase < phases::Backend && \"Generating single CUDA \" \"instructions should only occur \" \"before the backend phase!\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2775, __PRETTY_FUNCTION__))
;
2776
2777 // By default, we produce an action for each device arch.
2778 for (Action *&A : CudaDeviceActions)
2779 A = C.getDriver().ConstructPhaseAction(C, Args, CurPhase, A);
2780
2781 return ABRT_Success;
2782 }
2783 };
2784 /// \brief HIP action builder. It injects device code in the host backend
2785 /// action.
2786 class HIPActionBuilder final : public CudaActionBuilderBase {
2787 /// The linker inputs obtained for each device arch.
2788 SmallVector<ActionList, 8> DeviceLinkerInputs;
2789
2790 public:
2791 HIPActionBuilder(Compilation &C, DerivedArgList &Args,
2792 const Driver::InputList &Inputs)
2793 : CudaActionBuilderBase(C, Args, Inputs, Action::OFK_HIP) {
2794 DefaultCudaArch = CudaArch::GFX803;
2795 }
2796
2797 bool canUseBundlerUnbundler() const override { return true; }
2798
2799 StringRef getCanonicalOffloadArch(StringRef IdStr) override {
2800 llvm::StringMap<bool> Features;
2801 auto ArchStr =
2802 parseTargetID(getHIPOffloadTargetTriple(), IdStr, &Features);
2803 if (!ArchStr) {
2804 C.getDriver().Diag(clang::diag::err_drv_bad_target_id) << IdStr;
2805 C.setContainsError();
2806 return StringRef();
2807 }
2808 auto CanId = getCanonicalTargetID(ArchStr.getValue(), Features);
2809 return Args.MakeArgStringRef(CanId);
2810 };
2811
2812 llvm::Optional<std::pair<llvm::StringRef, llvm::StringRef>>
2813 getConflictOffloadArchCombination(
2814 const std::set<StringRef> &GpuArchs) override {
2815 return getConflictTargetIDCombination(GpuArchs);
2816 }
2817
2818 ActionBuilderReturnCode
2819 getDeviceDependences(OffloadAction::DeviceDependences &DA,
2820 phases::ID CurPhase, phases::ID FinalPhase,
2821 PhasesTy &Phases) override {
2822 // amdgcn does not support linking of object files, therefore we skip
2823 // backend and assemble phases to output LLVM IR. Except for generating
2824 // non-relocatable device coee, where we generate fat binary for device
2825 // code and pass to host in Backend phase.
2826 if (CudaDeviceActions.empty())
2827 return ABRT_Success;
2828
2829 assert(((CurPhase == phases::Link && Relocatable) ||((((CurPhase == phases::Link && Relocatable) || CudaDeviceActions
.size() == GpuArchList.size()) && "Expecting one action per GPU architecture."
) ? static_cast<void> (0) : __assert_fail ("((CurPhase == phases::Link && Relocatable) || CudaDeviceActions.size() == GpuArchList.size()) && \"Expecting one action per GPU architecture.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2831, __PRETTY_FUNCTION__))
2830 CudaDeviceActions.size() == GpuArchList.size()) &&((((CurPhase == phases::Link && Relocatable) || CudaDeviceActions
.size() == GpuArchList.size()) && "Expecting one action per GPU architecture."
) ? static_cast<void> (0) : __assert_fail ("((CurPhase == phases::Link && Relocatable) || CudaDeviceActions.size() == GpuArchList.size()) && \"Expecting one action per GPU architecture.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2831, __PRETTY_FUNCTION__))
2831 "Expecting one action per GPU architecture.")((((CurPhase == phases::Link && Relocatable) || CudaDeviceActions
.size() == GpuArchList.size()) && "Expecting one action per GPU architecture."
) ? static_cast<void> (0) : __assert_fail ("((CurPhase == phases::Link && Relocatable) || CudaDeviceActions.size() == GpuArchList.size()) && \"Expecting one action per GPU architecture.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2831, __PRETTY_FUNCTION__))
;
2832 assert(!CompileHostOnly &&((!CompileHostOnly && "Not expecting CUDA actions in host-only compilation."
) ? static_cast<void> (0) : __assert_fail ("!CompileHostOnly && \"Not expecting CUDA actions in host-only compilation.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2833, __PRETTY_FUNCTION__))
2833 "Not expecting CUDA actions in host-only compilation.")((!CompileHostOnly && "Not expecting CUDA actions in host-only compilation."
) ? static_cast<void> (0) : __assert_fail ("!CompileHostOnly && \"Not expecting CUDA actions in host-only compilation.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2833, __PRETTY_FUNCTION__))
;
2834
2835 if (!Relocatable && CurPhase == phases::Backend && !EmitLLVM &&
2836 !EmitAsm) {
2837 // If we are in backend phase, we attempt to generate the fat binary.
2838 // We compile each arch to IR and use a link action to generate code
2839 // object containing ISA. Then we use a special "link" action to create
2840 // a fat binary containing all the code objects for different GPU's.
2841 // The fat binary is then an input to the host action.
2842 for (unsigned I = 0, E = GpuArchList.size(); I != E; ++I) {
2843 auto BackendAction = C.getDriver().ConstructPhaseAction(
2844 C, Args, phases::Backend, CudaDeviceActions[I],
2845 AssociatedOffloadKind);
2846 auto AssembleAction = C.getDriver().ConstructPhaseAction(
2847 C, Args, phases::Assemble, BackendAction, AssociatedOffloadKind);
2848 // Create a link action to link device IR with device library
2849 // and generate ISA.
2850 ActionList AL;
2851 AL.push_back(AssembleAction);
2852 CudaDeviceActions[I] =
2853 C.MakeAction<LinkJobAction>(AL, types::TY_Image);
2854
2855 // OffloadingActionBuilder propagates device arch until an offload
2856 // action. Since the next action for creating fatbin does
2857 // not have device arch, whereas the above link action and its input
2858 // have device arch, an offload action is needed to stop the null
2859 // device arch of the next action being propagated to the above link
2860 // action.
2861 OffloadAction::DeviceDependences DDep;
2862 DDep.add(*CudaDeviceActions[I], *ToolChains.front(), GpuArchList[I],
2863 AssociatedOffloadKind);
2864 CudaDeviceActions[I] = C.MakeAction<OffloadAction>(
2865 DDep, CudaDeviceActions[I]->getType());
2866 }
2867 // Create HIP fat binary with a special "link" action.
2868 CudaFatBinary =
2869 C.MakeAction<LinkJobAction>(CudaDeviceActions,
2870 types::TY_HIP_FATBIN);
2871
2872 if (!CompileDeviceOnly) {
2873 DA.add(*CudaFatBinary, *ToolChains.front(), /*BoundArch=*/nullptr,
2874 AssociatedOffloadKind);
2875 // Clear the fat binary, it is already a dependence to an host
2876 // action.
2877 CudaFatBinary = nullptr;
2878 }
2879
2880 // Remove the CUDA actions as they are already connected to an host
2881 // action or fat binary.
2882 CudaDeviceActions.clear();
2883
2884 return CompileDeviceOnly ? ABRT_Ignore_Host : ABRT_Success;
2885 } else if (CurPhase == phases::Link) {
2886 // Save CudaDeviceActions to DeviceLinkerInputs for each GPU subarch.
2887 // This happens to each device action originated from each input file.
2888 // Later on, device actions in DeviceLinkerInputs are used to create
2889 // device link actions in appendLinkDependences and the created device
2890 // link actions are passed to the offload action as device dependence.
2891 DeviceLinkerInputs.resize(CudaDeviceActions.size());
2892 auto LI = DeviceLinkerInputs.begin();
2893 for (auto *A : CudaDeviceActions) {
2894 LI->push_back(A);
2895 ++LI;
2896 }
2897
2898 // We will pass the device action as a host dependence, so we don't
2899 // need to do anything else with them.
2900 CudaDeviceActions.clear();
2901 return ABRT_Success;
2902 }
2903
2904 // By default, we produce an action for each device arch.
2905 for (Action *&A : CudaDeviceActions)
2906 A = C.getDriver().ConstructPhaseAction(C, Args, CurPhase, A,
2907 AssociatedOffloadKind);
2908
2909 return (CompileDeviceOnly && CurPhase == FinalPhase) ? ABRT_Ignore_Host
2910 : ABRT_Success;
2911 }
2912
2913 void appendLinkDeviceActions(ActionList &AL) override {
2914 if (DeviceLinkerInputs.size() == 0)
2915 return;
2916
2917 assert(DeviceLinkerInputs.size() == GpuArchList.size() &&((DeviceLinkerInputs.size() == GpuArchList.size() && "Linker inputs and GPU arch list sizes do not match."
) ? static_cast<void> (0) : __assert_fail ("DeviceLinkerInputs.size() == GpuArchList.size() && \"Linker inputs and GPU arch list sizes do not match.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2918, __PRETTY_FUNCTION__))
2918 "Linker inputs and GPU arch list sizes do not match.")((DeviceLinkerInputs.size() == GpuArchList.size() && "Linker inputs and GPU arch list sizes do not match."
) ? static_cast<void> (0) : __assert_fail ("DeviceLinkerInputs.size() == GpuArchList.size() && \"Linker inputs and GPU arch list sizes do not match.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2918, __PRETTY_FUNCTION__))
;
2919
2920 // Append a new link action for each device.
2921 unsigned I = 0;
2922 for (auto &LI : DeviceLinkerInputs) {
2923 // Each entry in DeviceLinkerInputs corresponds to a GPU arch.
2924 auto *DeviceLinkAction =
2925 C.MakeAction<LinkJobAction>(LI, types::TY_Image);
2926 // Linking all inputs for the current GPU arch.
2927 // LI contains all the inputs for the linker.
2928 OffloadAction::DeviceDependences DeviceLinkDeps;
2929 DeviceLinkDeps.add(*DeviceLinkAction, *ToolChains[0],
2930 GpuArchList[I], AssociatedOffloadKind);
2931 AL.push_back(C.MakeAction<OffloadAction>(DeviceLinkDeps,
2932 DeviceLinkAction->getType()));
2933 ++I;
2934 }
2935 DeviceLinkerInputs.clear();
2936
2937 // Create a host object from all the device images by embedding them
2938 // in a fat binary.
2939 OffloadAction::DeviceDependences DDeps;
2940 auto *TopDeviceLinkAction =
2941 C.MakeAction<LinkJobAction>(AL, types::TY_Object);
2942 DDeps.add(*TopDeviceLinkAction, *ToolChains[0],
2943 nullptr, AssociatedOffloadKind);
2944
2945 // Offload the host object to the host linker.
2946 AL.push_back(C.MakeAction<OffloadAction>(DDeps, TopDeviceLinkAction->getType()));
2947 }
2948
2949 Action* appendLinkHostActions(ActionList &AL) override { return AL.back(); }
2950
2951 void appendLinkDependences(OffloadAction::DeviceDependences &DA) override {}
2952 };
2953
2954 /// OpenMP action builder. The host bitcode is passed to the device frontend
2955 /// and all the device linked images are passed to the host link phase.
2956 class OpenMPActionBuilder final : public DeviceActionBuilder {
2957 /// The OpenMP actions for the current input.
2958 ActionList OpenMPDeviceActions;
2959
2960 /// The linker inputs obtained for each toolchain.
2961 SmallVector<ActionList, 8> DeviceLinkerInputs;
2962
2963 public:
2964 OpenMPActionBuilder(Compilation &C, DerivedArgList &Args,
2965 const Driver::InputList &Inputs)
2966 : DeviceActionBuilder(C, Args, Inputs, Action::OFK_OpenMP) {}
2967
2968 ActionBuilderReturnCode
2969 getDeviceDependences(OffloadAction::DeviceDependences &DA,
2970 phases::ID CurPhase, phases::ID FinalPhase,
2971 PhasesTy &Phases) override {
2972 if (OpenMPDeviceActions.empty())
2973 return ABRT_Inactive;
2974
2975 // We should always have an action for each input.
2976 assert(OpenMPDeviceActions.size() == ToolChains.size() &&((OpenMPDeviceActions.size() == ToolChains.size() && "Number of OpenMP actions and toolchains do not match."
) ? static_cast<void> (0) : __assert_fail ("OpenMPDeviceActions.size() == ToolChains.size() && \"Number of OpenMP actions and toolchains do not match.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2977, __PRETTY_FUNCTION__))
2977 "Number of OpenMP actions and toolchains do not match.")((OpenMPDeviceActions.size() == ToolChains.size() && "Number of OpenMP actions and toolchains do not match."
) ? static_cast<void> (0) : __assert_fail ("OpenMPDeviceActions.size() == ToolChains.size() && \"Number of OpenMP actions and toolchains do not match.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2977, __PRETTY_FUNCTION__))
;
2978
2979 // The host only depends on device action in the linking phase, when all
2980 // the device images have to be embedded in the host image.
2981 if (CurPhase == phases::Link) {
2982 assert(ToolChains.size() == DeviceLinkerInputs.size() &&((ToolChains.size() == DeviceLinkerInputs.size() && "Toolchains and linker inputs sizes do not match."
) ? static_cast<void> (0) : __assert_fail ("ToolChains.size() == DeviceLinkerInputs.size() && \"Toolchains and linker inputs sizes do not match.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2983, __PRETTY_FUNCTION__))
2983 "Toolchains and linker inputs sizes do not match.")((ToolChains.size() == DeviceLinkerInputs.size() && "Toolchains and linker inputs sizes do not match."
) ? static_cast<void> (0) : __assert_fail ("ToolChains.size() == DeviceLinkerInputs.size() && \"Toolchains and linker inputs sizes do not match.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 2983, __PRETTY_FUNCTION__))
;
2984 auto LI = DeviceLinkerInputs.begin();
2985 for (auto *A : OpenMPDeviceActions) {
2986 LI->push_back(A);
2987 ++LI;
2988 }
2989
2990 // We passed the device action as a host dependence, so we don't need to
2991 // do anything else with them.
2992 OpenMPDeviceActions.clear();
2993 return ABRT_Success;
2994 }
2995
2996 // By default, we produce an action for each device arch.
2997 for (Action *&A : OpenMPDeviceActions)
2998 A = C.getDriver().ConstructPhaseAction(C, Args, CurPhase, A);
2999
3000 return ABRT_Success;
3001 }
3002
3003 ActionBuilderReturnCode addDeviceDepences(Action *HostAction) override {
3004
3005 // If this is an input action replicate it for each OpenMP toolchain.
3006 if (auto *IA = dyn_cast<InputAction>(HostAction)) {
3007 OpenMPDeviceActions.clear();
3008 for (unsigned I = 0; I < ToolChains.size(); ++I)
3009 OpenMPDeviceActions.push_back(
3010 C.MakeAction<InputAction>(IA->getInputArg(), IA->getType()));
3011 return ABRT_Success;
3012 }
3013
3014 // If this is an unbundling action use it as is for each OpenMP toolchain.
3015 if (auto *UA = dyn_cast<OffloadUnbundlingJobAction>(HostAction)) {
3016 OpenMPDeviceActions.clear();
3017 auto *IA = cast<InputAction>(UA->getInputs().back());
3018 std::string FileName = IA->getInputArg().getAsString(Args);
3019 // Check if the type of the file is the same as the action. Do not
3020 // unbundle it if it is not. Do not unbundle .so files, for example,
3021 // which are not object files.
3022 if (IA->getType() == types::TY_Object &&
3023 (!llvm::sys::path::has_extension(FileName) ||
3024 types::lookupTypeForExtension(
3025 llvm::sys::path::extension(FileName).drop_front()) !=
3026 types::TY_Object))
3027 return ABRT_Inactive;
3028 for (unsigned I = 0; I < ToolChains.size(); ++I) {
3029 OpenMPDeviceActions.push_back(UA);
3030 UA->registerDependentActionInfo(
3031 ToolChains[I], /*BoundArch=*/StringRef(), Action::OFK_OpenMP);
3032 }
3033 return ABRT_Success;
3034 }
3035
3036 // When generating code for OpenMP we use the host compile phase result as
3037 // a dependence to the device compile phase so that it can learn what
3038 // declarations should be emitted. However, this is not the only use for
3039 // the host action, so we prevent it from being collapsed.
3040 if (isa<CompileJobAction>(HostAction)) {
3041 HostAction->setCannotBeCollapsedWithNextDependentAction();
3042 assert(ToolChains.size() == OpenMPDeviceActions.size() &&((ToolChains.size() == OpenMPDeviceActions.size() && "Toolchains and device action sizes do not match."
) ? static_cast<void> (0) : __assert_fail ("ToolChains.size() == OpenMPDeviceActions.size() && \"Toolchains and device action sizes do not match.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 3043, __PRETTY_FUNCTION__))
3043 "Toolchains and device action sizes do not match.")((ToolChains.size() == OpenMPDeviceActions.size() && "Toolchains and device action sizes do not match."
) ? static_cast<void> (0) : __assert_fail ("ToolChains.size() == OpenMPDeviceActions.size() && \"Toolchains and device action sizes do not match.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 3043, __PRETTY_FUNCTION__))
;
3044 OffloadAction::HostDependence HDep(
3045 *HostAction, *C.getSingleOffloadToolChain<Action::OFK_Host>(),
3046 /*BoundArch=*/nullptr, Action::OFK_OpenMP);
3047 auto TC = ToolChains.begin();
3048 for (Action *&A : OpenMPDeviceActions) {
3049 assert(isa<CompileJobAction>(A))((isa<CompileJobAction>(A)) ? static_cast<void> (
0) : __assert_fail ("isa<CompileJobAction>(A)", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 3049, __PRETTY_FUNCTION__))
;
3050 OffloadAction::DeviceDependences DDep;
3051 DDep.add(*A, **TC, /*BoundArch=*/nullptr, Action::OFK_OpenMP);
3052 A = C.MakeAction<OffloadAction>(HDep, DDep);
3053 ++TC;
3054 }
3055 }
3056 return ABRT_Success;
3057 }
3058
3059 void appendTopLevelActions(ActionList &AL) override {
3060 if (OpenMPDeviceActions.empty())
3061 return;
3062
3063 // We should always have an action for each input.
3064 assert(OpenMPDeviceActions.size() == ToolChains.size() &&((OpenMPDeviceActions.size() == ToolChains.size() && "Number of OpenMP actions and toolchains do not match."
) ? static_cast<void> (0) : __assert_fail ("OpenMPDeviceActions.size() == ToolChains.size() && \"Number of OpenMP actions and toolchains do not match.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 3065, __PRETTY_FUNCTION__))
3065 "Number of OpenMP actions and toolchains do not match.")((OpenMPDeviceActions.size() == ToolChains.size() && "Number of OpenMP actions and toolchains do not match."
) ? static_cast<void> (0) : __assert_fail ("OpenMPDeviceActions.size() == ToolChains.size() && \"Number of OpenMP actions and toolchains do not match.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 3065, __PRETTY_FUNCTION__))
;
3066
3067 // Append all device actions followed by the proper offload action.
3068 auto TI = ToolChains.begin();
3069 for (auto *A : OpenMPDeviceActions) {
3070 OffloadAction::DeviceDependences Dep;
3071 Dep.add(*A, **TI, /*BoundArch=*/nullptr, Action::OFK_OpenMP);
3072 AL.push_back(C.MakeAction<OffloadAction>(Dep, A->getType()));
3073 ++TI;
3074 }
3075 // We no longer need the action stored in this builder.
3076 OpenMPDeviceActions.clear();
3077 }
3078
3079 void appendLinkDeviceActions(ActionList &AL) override {
3080 assert(ToolChains.size() == DeviceLinkerInputs.size() &&((ToolChains.size() == DeviceLinkerInputs.size() && "Toolchains and linker inputs sizes do not match."
) ? static_cast<void> (0) : __assert_fail ("ToolChains.size() == DeviceLinkerInputs.size() && \"Toolchains and linker inputs sizes do not match.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 3081, __PRETTY_FUNCTION__))
3081 "Toolchains and linker inputs sizes do not match.")((ToolChains.size() == DeviceLinkerInputs.size() && "Toolchains and linker inputs sizes do not match."
) ? static_cast<void> (0) : __assert_fail ("ToolChains.size() == DeviceLinkerInputs.size() && \"Toolchains and linker inputs sizes do not match.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 3081, __PRETTY_FUNCTION__))
;
3082
3083 // Append a new link action for each device.
3084 auto TC = ToolChains.begin();
3085 for (auto &LI : DeviceLinkerInputs) {
3086 auto *DeviceLinkAction =
3087 C.MakeAction<LinkJobAction>(LI, types::TY_Image);
3088 OffloadAction::DeviceDependences DeviceLinkDeps;
3089 DeviceLinkDeps.add(*DeviceLinkAction, **TC, /*BoundArch=*/nullptr,
3090 Action::OFK_OpenMP);
3091 AL.push_back(C.MakeAction<OffloadAction>(DeviceLinkDeps,
3092 DeviceLinkAction->getType()));
3093 ++TC;
3094 }
3095 DeviceLinkerInputs.clear();
3096 }
3097
3098 Action* appendLinkHostActions(ActionList &AL) override {
3099 // Create wrapper bitcode from the result of device link actions and compile
3100 // it to an object which will be added to the host link command.
3101 auto *BC = C.MakeAction<OffloadWrapperJobAction>(AL, types::TY_LLVM_BC);
3102 auto *ASM = C.MakeAction<BackendJobAction>(BC, types::TY_PP_Asm);
3103 return C.MakeAction<AssembleJobAction>(ASM, types::TY_Object);
3104 }
3105
3106 void appendLinkDependences(OffloadAction::DeviceDependences &DA) override {}
3107
3108 bool initialize() override {
3109 // Get the OpenMP toolchains. If we don't get any, the action builder will
3110 // know there is nothing to do related to OpenMP offloading.
3111 auto OpenMPTCRange = C.getOffloadToolChains<Action::OFK_OpenMP>();
3112 for (auto TI = OpenMPTCRange.first, TE = OpenMPTCRange.second; TI != TE;
3113 ++TI)
3114 ToolChains.push_back(TI->second);
3115
3116 DeviceLinkerInputs.resize(ToolChains.size());
3117 return false;
3118 }
3119
3120 bool canUseBundlerUnbundler() const override {
3121 // OpenMP should use bundled files whenever possible.
3122 return true;
3123 }
3124 };
3125
3126 ///
3127 /// TODO: Add the implementation for other specialized builders here.
3128 ///
3129
3130 /// Specialized builders being used by this offloading action builder.
3131 SmallVector<DeviceActionBuilder *, 4> SpecializedBuilders;
3132
3133 /// Flag set to true if all valid builders allow file bundling/unbundling.
3134 bool CanUseBundler;
3135
3136public:
3137 OffloadingActionBuilder(Compilation &C, DerivedArgList &Args,
3138 const Driver::InputList &Inputs)
3139 : C(C) {
3140 // Create a specialized builder for each device toolchain.
3141
3142 IsValid = true;
3143
3144 // Create a specialized builder for CUDA.
3145 SpecializedBuilders.push_back(new CudaActionBuilder(C, Args, Inputs));
3146
3147 // Create a specialized builder for HIP.
3148 SpecializedBuilders.push_back(new HIPActionBuilder(C, Args, Inputs));
3149
3150 // Create a specialized builder for OpenMP.
3151 SpecializedBuilders.push_back(new OpenMPActionBuilder(C, Args, Inputs));
3152
3153 //
3154 // TODO: Build other specialized builders here.
3155 //
3156
3157 // Initialize all the builders, keeping track of errors. If all valid
3158 // builders agree that we can use bundling, set the flag to true.
3159 unsigned ValidBuilders = 0u;
3160 unsigned ValidBuildersSupportingBundling = 0u;
3161 for (auto *SB : SpecializedBuilders) {
3162 IsValid = IsValid && !SB->initialize();
3163
3164 // Update the counters if the builder is valid.
3165 if (SB->isValid()) {
3166 ++ValidBuilders;
3167 if (SB->canUseBundlerUnbundler())
3168 ++ValidBuildersSupportingBundling;
3169 }
3170 }
3171 CanUseBundler =
3172 ValidBuilders && ValidBuilders == ValidBuildersSupportingBundling;
3173 }
3174
3175 ~OffloadingActionBuilder() {
3176 for (auto *SB : SpecializedBuilders)
3177 delete SB;
3178 }
3179
3180 /// Generate an action that adds device dependences (if any) to a host action.
3181 /// If no device dependence actions exist, just return the host action \a
3182 /// HostAction. If an error is found or if no builder requires the host action
3183 /// to be generated, return nullptr.
3184 Action *
3185 addDeviceDependencesToHostAction(Action *HostAction, const Arg *InputArg,
3186 phases::ID CurPhase, phases::ID FinalPhase,
3187 DeviceActionBuilder::PhasesTy &Phases) {
3188 if (!IsValid)
3189 return nullptr;
3190
3191 if (SpecializedBuilders.empty())
3192 return HostAction;
3193
3194 assert(HostAction && "Invalid host action!")((HostAction && "Invalid host action!") ? static_cast
<void> (0) : __assert_fail ("HostAction && \"Invalid host action!\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 3194, __PRETTY_FUNCTION__))
;
3195
3196 OffloadAction::DeviceDependences DDeps;
3197 // Check if all the programming models agree we should not emit the host
3198 // action. Also, keep track of the offloading kinds employed.
3199 auto &OffloadKind = InputArgToOffloadKindMap[InputArg];
3200 unsigned InactiveBuilders = 0u;
3201 unsigned IgnoringBuilders = 0u;
3202 for (auto *SB : SpecializedBuilders) {
3203 if (!SB->isValid()) {
3204 ++InactiveBuilders;
3205 continue;
3206 }
3207
3208 auto RetCode =
3209 SB->getDeviceDependences(DDeps, CurPhase, FinalPhase, Phases);
3210
3211 // If the builder explicitly says the host action should be ignored,
3212 // we need to increment the variable that tracks the builders that request
3213 // the host object to be ignored.
3214 if (RetCode == DeviceActionBuilder::ABRT_Ignore_Host)
3215 ++IgnoringBuilders;
3216
3217 // Unless the builder was inactive for this action, we have to record the
3218 // offload kind because the host will have to use it.
3219 if (RetCode != DeviceActionBuilder::ABRT_Inactive)
3220 OffloadKind |= SB->getAssociatedOffloadKind();
3221 }
3222
3223 // If all builders agree that the host object should be ignored, just return
3224 // nullptr.
3225 if (IgnoringBuilders &&
3226 SpecializedBuilders.size() == (InactiveBuilders + IgnoringBuilders))
3227 return nullptr;
3228
3229 if (DDeps.getActions().empty())
3230 return HostAction;
3231
3232 // We have dependences we need to bundle together. We use an offload action
3233 // for that.
3234 OffloadAction::HostDependence HDep(
3235 *HostAction, *C.getSingleOffloadToolChain<Action::OFK_Host>(),
3236 /*BoundArch=*/nullptr, DDeps);
3237 return C.MakeAction<OffloadAction>(HDep, DDeps);
3238 }
3239
3240 /// Generate an action that adds a host dependence to a device action. The
3241 /// results will be kept in this action builder. Return true if an error was
3242 /// found.
3243 bool addHostDependenceToDeviceActions(Action *&HostAction,
3244 const Arg *InputArg) {
3245 if (!IsValid)
3246 return true;
3247
3248 // If we are supporting bundling/unbundling and the current action is an
3249 // input action of non-source file, we replace the host action by the
3250 // unbundling action. The bundler tool has the logic to detect if an input
3251 // is a bundle or not and if the input is not a bundle it assumes it is a
3252 // host file. Therefore it is safe to create an unbundling action even if
3253 // the input is not a bundle.
3254 if (CanUseBundler && isa<InputAction>(HostAction) &&
3255 InputArg->getOption().getKind() == llvm::opt::Option::InputClass &&
3256 (!types::isSrcFile(HostAction->getType()) ||
3257 HostAction->getType() == types::TY_PP_HIP)) {
3258 auto UnbundlingHostAction =
3259 C.MakeAction<OffloadUnbundlingJobAction>(HostAction);
3260 UnbundlingHostAction->registerDependentActionInfo(
3261 C.getSingleOffloadToolChain<Action::OFK_Host>(),
3262 /*BoundArch=*/StringRef(), Action::OFK_Host);
3263 HostAction = UnbundlingHostAction;
3264 }
3265
3266 assert(HostAction && "Invalid host action!")((HostAction && "Invalid host action!") ? static_cast
<void> (0) : __assert_fail ("HostAction && \"Invalid host action!\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 3266, __PRETTY_FUNCTION__))
;
3267
3268 // Register the offload kinds that are used.
3269 auto &OffloadKind = InputArgToOffloadKindMap[InputArg];
3270 for (auto *SB : SpecializedBuilders) {
3271 if (!SB->isValid())
3272 continue;
3273
3274 auto RetCode = SB->addDeviceDepences(HostAction);
3275
3276 // Host dependences for device actions are not compatible with that same
3277 // action being ignored.
3278 assert(RetCode != DeviceActionBuilder::ABRT_Ignore_Host &&((RetCode != DeviceActionBuilder::ABRT_Ignore_Host &&
"Host dependence not expected to be ignored.!") ? static_cast
<void> (0) : __assert_fail ("RetCode != DeviceActionBuilder::ABRT_Ignore_Host && \"Host dependence not expected to be ignored.!\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 3279, __PRETTY_FUNCTION__))
3279 "Host dependence not expected to be ignored.!")((RetCode != DeviceActionBuilder::ABRT_Ignore_Host &&
"Host dependence not expected to be ignored.!") ? static_cast
<void> (0) : __assert_fail ("RetCode != DeviceActionBuilder::ABRT_Ignore_Host && \"Host dependence not expected to be ignored.!\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 3279, __PRETTY_FUNCTION__))
;
3280
3281 // Unless the builder was inactive for this action, we have to record the
3282 // offload kind because the host will have to use it.
3283 if (RetCode != DeviceActionBuilder::ABRT_Inactive)
3284 OffloadKind |= SB->getAssociatedOffloadKind();
3285 }
3286
3287 // Do not use unbundler if the Host does not depend on device action.
3288 if (OffloadKind == Action::OFK_None && CanUseBundler)
3289 if (auto *UA = dyn_cast<OffloadUnbundlingJobAction>(HostAction))
3290 HostAction = UA->getInputs().back();
3291
3292 return false;
3293 }
3294
3295 /// Add the offloading top level actions to the provided action list. This
3296 /// function can replace the host action by a bundling action if the
3297 /// programming models allow it.
3298 bool appendTopLevelActions(ActionList &AL, Action *HostAction,
3299 const Arg *InputArg) {
3300 // Get the device actions to be appended.
3301 ActionList OffloadAL;
3302 for (auto *SB : SpecializedBuilders) {
3303 if (!SB->isValid())
3304 continue;
3305 SB->appendTopLevelActions(OffloadAL);
3306 }
3307
3308 // If we can use the bundler, replace the host action by the bundling one in
3309 // the resulting list. Otherwise, just append the device actions. For
3310 // device only compilation, HostAction is a null pointer, therefore only do
3311 // this when HostAction is not a null pointer.
3312 if (CanUseBundler && HostAction &&
3313 HostAction->getType() != types::TY_Nothing && !OffloadAL.empty()) {
3314 // Add the host action to the list in order to create the bundling action.
3315 OffloadAL.push_back(HostAction);
3316
3317 // We expect that the host action was just appended to the action list
3318 // before this method was called.
3319 assert(HostAction == AL.back() && "Host action not in the list??")((HostAction == AL.back() && "Host action not in the list??"
) ? static_cast<void> (0) : __assert_fail ("HostAction == AL.back() && \"Host action not in the list??\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 3319, __PRETTY_FUNCTION__))
;
3320 HostAction = C.MakeAction<OffloadBundlingJobAction>(OffloadAL);
3321 AL.back() = HostAction;
3322 } else
3323 AL.append(OffloadAL.begin(), OffloadAL.end());
3324
3325 // Propagate to the current host action (if any) the offload information
3326 // associated with the current input.
3327 if (HostAction)
3328 HostAction->propagateHostOffloadInfo(InputArgToOffloadKindMap[InputArg],
3329 /*BoundArch=*/nullptr);
3330 return false;
3331 }
3332
3333 Action* makeHostLinkAction() {
3334 // Build a list of device linking actions.
3335 ActionList DeviceAL;
3336 for (DeviceActionBuilder *SB : SpecializedBuilders) {
13
Assuming '__begin2' is equal to '__end2'
3337 if (!SB->isValid())
3338 continue;
3339 SB->appendLinkDeviceActions(DeviceAL);
3340 }
3341
3342 if (DeviceAL.empty())
14
Calling 'SmallVectorBase::empty'
17
Returning from 'SmallVectorBase::empty'
18
Taking false branch
3343 return nullptr;
3344
3345 // Let builders add host linking actions.
3346 Action* HA;
19
'HA' declared without an initial value
3347 for (DeviceActionBuilder *SB : SpecializedBuilders) {
20
Assuming '__begin2' is equal to '__end2'
3348 if (!SB->isValid())
3349 continue;
3350 HA = SB->appendLinkHostActions(DeviceAL);
3351 }
3352 return HA;
21
Undefined or garbage value returned to caller
3353 }
3354
3355 /// Processes the host linker action. This currently consists of replacing it
3356 /// with an offload action if there are device link objects and propagate to
3357 /// the host action all the offload kinds used in the current compilation. The
3358 /// resulting action is returned.
3359 Action *processHostLinkAction(Action *HostAction) {
3360 // Add all the dependences from the device linking actions.
3361 OffloadAction::DeviceDependences DDeps;
3362 for (auto *SB : SpecializedBuilders) {
3363 if (!SB->isValid())
3364 continue;
3365
3366 SB->appendLinkDependences(DDeps);
3367 }
3368
3369 // Calculate all the offload kinds used in the current compilation.
3370 unsigned ActiveOffloadKinds = 0u;
3371 for (auto &I : InputArgToOffloadKindMap)
3372 ActiveOffloadKinds |= I.second;
3373
3374 // If we don't have device dependencies, we don't have to create an offload
3375 // action.
3376 if (DDeps.getActions().empty()) {
3377 // Propagate all the active kinds to host action. Given that it is a link
3378 // action it is assumed to depend on all actions generated so far.
3379 HostAction->propagateHostOffloadInfo(ActiveOffloadKinds,
3380 /*BoundArch=*/nullptr);
3381 return HostAction;
3382 }
3383
3384 // Create the offload action with all dependences. When an offload action
3385 // is created the kinds are propagated to the host action, so we don't have
3386 // to do that explicitly here.
3387 OffloadAction::HostDependence HDep(
3388 *HostAction, *C.getSingleOffloadToolChain<Action::OFK_Host>(),
3389 /*BoundArch*/ nullptr, ActiveOffloadKinds);
3390 return C.MakeAction<OffloadAction>(HDep, DDeps);
3391 }
3392};
3393} // anonymous namespace.
3394
3395void Driver::handleArguments(Compilation &C, DerivedArgList &Args,
3396 const InputList &Inputs,
3397 ActionList &Actions) const {
3398
3399 // Ignore /Yc/Yu if both /Yc and /Yu passed but with different filenames.
3400 Arg *YcArg = Args.getLastArg(options::OPT__SLASH_Yc);
3401 Arg *YuArg = Args.getLastArg(options::OPT__SLASH_Yu);
3402 if (YcArg && YuArg && strcmp(YcArg->getValue(), YuArg->getValue()) != 0) {
3403 Diag(clang::diag::warn_drv_ycyu_different_arg_clang_cl);
3404 Args.eraseArg(options::OPT__SLASH_Yc);
3405 Args.eraseArg(options::OPT__SLASH_Yu);
3406 YcArg = YuArg = nullptr;
3407 }
3408 if (YcArg && Inputs.size() > 1) {
3409 Diag(clang::diag::warn_drv_yc_multiple_inputs_clang_cl);
3410 Args.eraseArg(options::OPT__SLASH_Yc);
3411 YcArg = nullptr;
3412 }
3413
3414 Arg *FinalPhaseArg;
3415 phases::ID FinalPhase = getFinalPhase(Args, &FinalPhaseArg);
3416
3417 if (FinalPhase == phases::Link) {
3418 if (Args.hasArg(options::OPT_emit_llvm))
3419 Diag(clang::diag::err_drv_emit_llvm_link);
3420 if (IsCLMode() && LTOMode != LTOK_None &&
3421 !Args.getLastArgValue(options::OPT_fuse_ld_EQ).equals_lower("lld"))
3422 Diag(clang::diag::err_drv_lto_without_lld);
3423 }
3424
3425 if (FinalPhase == phases::Preprocess || Args.hasArg(options::OPT__SLASH_Y_)) {
3426 // If only preprocessing or /Y- is used, all pch handling is disabled.
3427 // Rather than check for it everywhere, just remove clang-cl pch-related
3428 // flags here.
3429 Args.eraseArg(options::OPT__SLASH_Fp);
3430 Args.eraseArg(options::OPT__SLASH_Yc);
3431 Args.eraseArg(options::OPT__SLASH_Yu);
3432 YcArg = YuArg = nullptr;
3433 }
3434
3435 unsigned LastPLSize = 0;
3436 for (auto &I : Inputs) {
3437 types::ID InputType = I.first;
3438 const Arg *InputArg = I.second;
3439
3440 auto PL = types::getCompilationPhases(InputType);
3441 LastPLSize = PL.size();
3442
3443 // If the first step comes after the final phase we are doing as part of
3444 // this compilation, warn the user about it.
3445 phases::ID InitialPhase = PL[0];
3446 if (InitialPhase > FinalPhase) {
3447 if (InputArg->isClaimed())
3448 continue;
3449
3450 // Claim here to avoid the more general unused warning.
3451 InputArg->claim();
3452
3453 // Suppress all unused style warnings with -Qunused-arguments
3454 if (Args.hasArg(options::OPT_Qunused_arguments))
3455 continue;
3456
3457 // Special case when final phase determined by binary name, rather than
3458 // by a command-line argument with a corresponding Arg.
3459 if (CCCIsCPP())
3460 Diag(clang::diag::warn_drv_input_file_unused_by_cpp)
3461 << InputArg->getAsString(Args) << getPhaseName(InitialPhase);
3462 // Special case '-E' warning on a previously preprocessed file to make
3463 // more sense.
3464 else if (InitialPhase == phases::Compile &&
3465 (Args.getLastArg(options::OPT__SLASH_EP,
3466 options::OPT__SLASH_P) ||
3467 Args.getLastArg(options::OPT_E) ||
3468 Args.getLastArg(options::OPT_M, options::OPT_MM)) &&
3469 getPreprocessedType(InputType) == types::TY_INVALID)
3470 Diag(clang::diag::warn_drv_preprocessed_input_file_unused)
3471 << InputArg->getAsString(Args) << !!FinalPhaseArg
3472 << (FinalPhaseArg ? FinalPhaseArg->getOption().getName() : "");
3473 else
3474 Diag(clang::diag::warn_drv_input_file_unused)
3475 << InputArg->getAsString(Args) << getPhaseName(InitialPhase)
3476 << !!FinalPhaseArg
3477 << (FinalPhaseArg ? FinalPhaseArg->getOption().getName() : "");
3478 continue;
3479 }
3480
3481 if (YcArg) {
3482 // Add a separate precompile phase for the compile phase.
3483 if (FinalPhase >= phases::Compile) {
3484 const types::ID HeaderType = lookupHeaderTypeForSourceType(InputType);
3485 // Build the pipeline for the pch file.
3486 Action *ClangClPch = C.MakeAction<InputAction>(*InputArg, HeaderType);
3487 for (phases::ID Phase : types::getCompilationPhases(HeaderType))
3488 ClangClPch = ConstructPhaseAction(C, Args, Phase, ClangClPch);
3489 assert(ClangClPch)((ClangClPch) ? static_cast<void> (0) : __assert_fail (
"ClangClPch", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 3489, __PRETTY_FUNCTION__))
;
3490 Actions.push_back(ClangClPch);
3491 // The driver currently exits after the first failed command. This
3492 // relies on that behavior, to make sure if the pch generation fails,
3493 // the main compilation won't run.
3494 // FIXME: If the main compilation fails, the PCH generation should
3495 // probably not be considered successful either.
3496 }
3497 }
3498 }
3499
3500 // If we are linking, claim any options which are obviously only used for
3501 // compilation.
3502 // FIXME: Understand why the last Phase List length is used here.
3503 if (FinalPhase == phases::Link && LastPLSize == 1) {
3504 Args.ClaimAllArgs(options::OPT_CompileOnly_Group);
3505 Args.ClaimAllArgs(options::OPT_cl_compile_Group);
3506 }
3507}
3508
3509void Driver::BuildActions(Compilation &C, DerivedArgList &Args,
3510 const InputList &Inputs, ActionList &Actions) const {
3511 llvm::PrettyStackTraceString CrashInfo("Building compilation actions");
3512
3513 if (!SuppressMissingInputWarning && Inputs.empty()) {
1
Assuming field 'SuppressMissingInputWarning' is not equal to 0
3514 Diag(clang::diag::err_drv_no_input_files);
3515 return;
3516 }
3517
3518 // Reject -Z* at the top level, these options should never have been exposed
3519 // by gcc.
3520 if (Arg *A = Args.getLastArg(options::OPT_Z_Joined))
2
Assuming 'A' is null
3
Taking false branch
3521 Diag(clang::diag::err_drv_use_of_Z_option) << A->getAsString(Args);
3522
3523 // Diagnose misuse of /Fo.
3524 if (Arg *A = Args.getLastArg(options::OPT__SLASH_Fo)) {
4
Assuming 'A' is null
5
Taking false branch
3525 StringRef V = A->getValue();
3526 if (Inputs.size() > 1 && !V.empty() &&
3527 !llvm::sys::path::is_separator(V.back())) {
3528 // Check whether /Fo tries to name an output file for multiple inputs.
3529 Diag(clang::diag::err_drv_out_file_argument_with_multiple_sources)
3530 << A->getSpelling() << V;
3531 Args.eraseArg(options::OPT__SLASH_Fo);
3532 }
3533 }
3534
3535 // Diagnose misuse of /Fa.
3536 if (Arg *A = Args.getLastArg(options::OPT__SLASH_Fa)) {
6
Assuming 'A' is null
7
Taking false branch
3537 StringRef V = A->getValue();
3538 if (Inputs.size() > 1 && !V.empty() &&
3539 !llvm::sys::path::is_separator(V.back())) {
3540 // Check whether /Fa tries to name an asm file for multiple inputs.
3541 Diag(clang::diag::err_drv_out_file_argument_with_multiple_sources)
3542 << A->getSpelling() << V;
3543 Args.eraseArg(options::OPT__SLASH_Fa);
3544 }
3545 }
3546
3547 // Diagnose misuse of /o.
3548 if (Arg *A = Args.getLastArg(options::OPT__SLASH_o)) {
8
Assuming 'A' is null
9
Taking false branch
3549 if (A->getValue()[0] == '\0') {
3550 // It has to have a value.
3551 Diag(clang::diag::err_drv_missing_argument) << A->getSpelling() << 1;
3552 Args.eraseArg(options::OPT__SLASH_o);
3553 }
3554 }
3555
3556 handleArguments(C, Args, Inputs, Actions);
3557
3558 // Builder to be used to build offloading actions.
3559 OffloadingActionBuilder OffloadBuilder(C, Args, Inputs);
3560
3561 // Construct the actions to perform.
3562 HeaderModulePrecompileJobAction *HeaderModuleAction = nullptr;
3563 ActionList LinkerInputs;
3564 ActionList MergerInputs;
3565
3566 for (auto &I : Inputs) {
10
Assuming '__begin1' is equal to '__end1'
3567 types::ID InputType = I.first;
3568 const Arg *InputArg = I.second;
3569
3570 auto PL = types::getCompilationPhases(*this, Args, InputType);
3571 if (PL.empty())
3572 continue;
3573
3574 auto FullPL = types::getCompilationPhases(InputType);
3575
3576 // Build the pipeline for this file.
3577 Action *Current = C.MakeAction<InputAction>(*InputArg, InputType);
3578
3579 // Use the current host action in any of the offloading actions, if
3580 // required.
3581 if (OffloadBuilder.addHostDependenceToDeviceActions(Current, InputArg))
3582 break;
3583
3584 for (phases::ID Phase : PL) {
3585
3586 // Add any offload action the host action depends on.
3587 Current = OffloadBuilder.addDeviceDependencesToHostAction(
3588 Current, InputArg, Phase, PL.back(), FullPL);
3589 if (!Current)
3590 break;
3591
3592 // Queue linker inputs.
3593 if (Phase == phases::Link) {
3594 assert(Phase == PL.back() && "linking must be final compilation step.")((Phase == PL.back() && "linking must be final compilation step."
) ? static_cast<void> (0) : __assert_fail ("Phase == PL.back() && \"linking must be final compilation step.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 3594, __PRETTY_FUNCTION__))
;
3595 LinkerInputs.push_back(Current);
3596 Current = nullptr;
3597 break;
3598 }
3599
3600 // TODO: Consider removing this because the merged may not end up being
3601 // the final Phase in the pipeline. Perhaps the merged could just merge
3602 // and then pass an artifact of some sort to the Link Phase.
3603 // Queue merger inputs.
3604 if (Phase == phases::IfsMerge) {
3605 assert(Phase == PL.back() && "merging must be final compilation step.")((Phase == PL.back() && "merging must be final compilation step."
) ? static_cast<void> (0) : __assert_fail ("Phase == PL.back() && \"merging must be final compilation step.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 3605, __PRETTY_FUNCTION__))
;
3606 MergerInputs.push_back(Current);
3607 Current = nullptr;
3608 break;
3609 }
3610
3611 // Each precompiled header file after a module file action is a module
3612 // header of that same module file, rather than being compiled to a
3613 // separate PCH.
3614 if (Phase == phases::Precompile && HeaderModuleAction &&
3615 getPrecompiledType(InputType) == types::TY_PCH) {
3616 HeaderModuleAction->addModuleHeaderInput(Current);
3617 Current = nullptr;
3618 break;
3619 }
3620
3621 // FIXME: Should we include any prior module file outputs as inputs of
3622 // later actions in the same command line?
3623
3624 // Otherwise construct the appropriate action.
3625 Action *NewCurrent = ConstructPhaseAction(C, Args, Phase, Current);
3626
3627 // We didn't create a new action, so we will just move to the next phase.
3628 if (NewCurrent == Current)
3629 continue;
3630
3631 if (auto *HMA = dyn_cast<HeaderModulePrecompileJobAction>(NewCurrent))
3632 HeaderModuleAction = HMA;
3633
3634 Current = NewCurrent;
3635
3636 // Use the current host action in any of the offloading actions, if
3637 // required.
3638 if (OffloadBuilder.addHostDependenceToDeviceActions(Current, InputArg))
3639 break;
3640
3641 if (Current->getType() == types::TY_Nothing)
3642 break;
3643 }
3644
3645 // If we ended with something, add to the output list.
3646 if (Current)
3647 Actions.push_back(Current);
3648
3649 // Add any top level actions generated for offloading.
3650 OffloadBuilder.appendTopLevelActions(Actions, Current, InputArg);
3651 }
3652
3653 // Add a link action if necessary.
3654 if (!LinkerInputs.empty()) {
11
Taking true branch
3655 if (Action *Wrapper = OffloadBuilder.makeHostLinkAction())
12
Calling 'OffloadingActionBuilder::makeHostLinkAction'
3656 LinkerInputs.push_back(Wrapper);
3657 Action *LA;
3658 // Check if this Linker Job should emit a static library.
3659 if (ShouldEmitStaticLibrary(Args)) {
3660 LA = C.MakeAction<StaticLibJobAction>(LinkerInputs, types::TY_Image);
3661 } else {
3662 LA = C.MakeAction<LinkJobAction>(LinkerInputs, types::TY_Image);
3663 }
3664 LA = OffloadBuilder.processHostLinkAction(LA);
3665 Actions.push_back(LA);
3666 }
3667
3668 // Add an interface stubs merge action if necessary.
3669 if (!MergerInputs.empty())
3670 Actions.push_back(
3671 C.MakeAction<IfsMergeJobAction>(MergerInputs, types::TY_Image));
3672
3673 if (Args.hasArg(options::OPT_emit_interface_stubs)) {
3674 auto PhaseList = types::getCompilationPhases(
3675 types::TY_IFS_CPP,
3676 Args.hasArg(options::OPT_c) ? phases::Compile : phases::LastPhase);
3677
3678 ActionList MergerInputs;
3679
3680 for (auto &I : Inputs) {
3681 types::ID InputType = I.first;
3682 const Arg *InputArg = I.second;
3683
3684 // Currently clang and the llvm assembler do not support generating symbol
3685 // stubs from assembly, so we skip the input on asm files. For ifs files
3686 // we rely on the normal pipeline setup in the pipeline setup code above.
3687 if (InputType == types::TY_IFS || InputType == types::TY_PP_Asm ||
3688 InputType == types::TY_Asm)
3689 continue;
3690
3691 Action *Current = C.MakeAction<InputAction>(*InputArg, InputType);
3692
3693 for (auto Phase : PhaseList) {
3694 switch (Phase) {
3695 default:
3696 llvm_unreachable(::llvm::llvm_unreachable_internal("IFS Pipeline can only consist of Compile followed by IfsMerge."
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 3697)
3697 "IFS Pipeline can only consist of Compile followed by IfsMerge.")::llvm::llvm_unreachable_internal("IFS Pipeline can only consist of Compile followed by IfsMerge."
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 3697)
;
3698 case phases::Compile: {
3699 // Only IfsMerge (llvm-ifs) can handle .o files by looking for ifs
3700 // files where the .o file is located. The compile action can not
3701 // handle this.
3702 if (InputType == types::TY_Object)
3703 break;
3704
3705 Current = C.MakeAction<CompileJobAction>(Current, types::TY_IFS_CPP);
3706 break;
3707 }
3708 case phases::IfsMerge: {
3709 assert(Phase == PhaseList.back() &&((Phase == PhaseList.back() && "merging must be final compilation step."
) ? static_cast<void> (0) : __assert_fail ("Phase == PhaseList.back() && \"merging must be final compilation step.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 3710, __PRETTY_FUNCTION__))
3710 "merging must be final compilation step.")((Phase == PhaseList.back() && "merging must be final compilation step."
) ? static_cast<void> (0) : __assert_fail ("Phase == PhaseList.back() && \"merging must be final compilation step.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 3710, __PRETTY_FUNCTION__))
;
3711 MergerInputs.push_back(Current);
3712 Current = nullptr;
3713 break;
3714 }
3715 }
3716 }
3717
3718 // If we ended with something, add to the output list.
3719 if (Current)
3720 Actions.push_back(Current);
3721 }
3722
3723 // Add an interface stubs merge action if necessary.
3724 if (!MergerInputs.empty())
3725 Actions.push_back(
3726 C.MakeAction<IfsMergeJobAction>(MergerInputs, types::TY_Image));
3727 }
3728
3729 // If --print-supported-cpus, -mcpu=? or -mtune=? is specified, build a custom
3730 // Compile phase that prints out supported cpu models and quits.
3731 if (Arg *A = Args.getLastArg(options::OPT_print_supported_cpus)) {
3732 // Use the -mcpu=? flag as the dummy input to cc1.
3733 Actions.clear();
3734 Action *InputAc = C.MakeAction<InputAction>(*A, types::TY_C);
3735 Actions.push_back(
3736 C.MakeAction<PrecompileJobAction>(InputAc, types::TY_Nothing));
3737 for (auto &I : Inputs)
3738 I.second->claim();
3739 }
3740
3741 // Claim ignored clang-cl options.
3742 Args.ClaimAllArgs(options::OPT_cl_ignored_Group);
3743
3744 // Claim --cuda-host-only and --cuda-compile-host-device, which may be passed
3745 // to non-CUDA compilations and should not trigger warnings there.
3746 Args.ClaimAllArgs(options::OPT_cuda_host_only);
3747 Args.ClaimAllArgs(options::OPT_cuda_compile_host_device);
3748}
3749
3750Action *Driver::ConstructPhaseAction(
3751 Compilation &C, const ArgList &Args, phases::ID Phase, Action *Input,
3752 Action::OffloadKind TargetDeviceOffloadKind) const {
3753 llvm::PrettyStackTraceString CrashInfo("Constructing phase actions");
3754
3755 // Some types skip the assembler phase (e.g., llvm-bc), but we can't
3756 // encode this in the steps because the intermediate type depends on
3757 // arguments. Just special case here.
3758 if (Phase == phases::Assemble && Input->getType() != types::TY_PP_Asm)
3759 return Input;
3760
3761 // Build the appropriate action.
3762 switch (Phase) {
3763 case phases::Link:
3764 llvm_unreachable("link action invalid here.")::llvm::llvm_unreachable_internal("link action invalid here."
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 3764)
;
3765 case phases::IfsMerge:
3766 llvm_unreachable("ifsmerge action invalid here.")::llvm::llvm_unreachable_internal("ifsmerge action invalid here."
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 3766)
;
3767 case phases::Preprocess: {
3768 types::ID OutputTy;
3769 // -M and -MM specify the dependency file name by altering the output type,
3770 // -if -MD and -MMD are not specified.
3771 if (Args.hasArg(options::OPT_M, options::OPT_MM) &&
3772 !Args.hasArg(options::OPT_MD, options::OPT_MMD)) {
3773 OutputTy = types::TY_Dependencies;
3774 } else {
3775 OutputTy = Input->getType();
3776 if (!Args.hasFlag(options::OPT_frewrite_includes,
3777 options::OPT_fno_rewrite_includes, false) &&
3778 !Args.hasFlag(options::OPT_frewrite_imports,
3779 options::OPT_fno_rewrite_imports, false) &&
3780 !CCGenDiagnostics)
3781 OutputTy = types::getPreprocessedType(OutputTy);
3782 assert(OutputTy != types::TY_INVALID &&((OutputTy != types::TY_INVALID && "Cannot preprocess this input type!"
) ? static_cast<void> (0) : __assert_fail ("OutputTy != types::TY_INVALID && \"Cannot preprocess this input type!\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 3783, __PRETTY_FUNCTION__))
3783 "Cannot preprocess this input type!")((OutputTy != types::TY_INVALID && "Cannot preprocess this input type!"
) ? static_cast<void> (0) : __assert_fail ("OutputTy != types::TY_INVALID && \"Cannot preprocess this input type!\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 3783, __PRETTY_FUNCTION__))
;
3784 }
3785 return C.MakeAction<PreprocessJobAction>(Input, OutputTy);
3786 }
3787 case phases::Precompile: {
3788 types::ID OutputTy = getPrecompiledType(Input->getType());
3789 assert(OutputTy != types::TY_INVALID &&((OutputTy != types::TY_INVALID && "Cannot precompile this input type!"
) ? static_cast<void> (0) : __assert_fail ("OutputTy != types::TY_INVALID && \"Cannot precompile this input type!\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 3790, __PRETTY_FUNCTION__))
3790 "Cannot precompile this input type!")((OutputTy != types::TY_INVALID && "Cannot precompile this input type!"
) ? static_cast<void> (0) : __assert_fail ("OutputTy != types::TY_INVALID && \"Cannot precompile this input type!\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 3790, __PRETTY_FUNCTION__))
;
3791
3792 // If we're given a module name, precompile header file inputs as a
3793 // module, not as a precompiled header.
3794 const char *ModName = nullptr;
3795 if (OutputTy == types::TY_PCH) {
3796 if (Arg *A = Args.getLastArg(options::OPT_fmodule_name_EQ))
3797 ModName = A->getValue();
3798 if (ModName)
3799 OutputTy = types::TY_ModuleFile;
3800 }
3801
3802 if (Args.hasArg(options::OPT_fsyntax_only)) {
3803 // Syntax checks should not emit a PCH file
3804 OutputTy = types::TY_Nothing;
3805 }
3806
3807 if (ModName)
3808 return C.MakeAction<HeaderModulePrecompileJobAction>(Input, OutputTy,
3809 ModName);
3810 return C.MakeAction<PrecompileJobAction>(Input, OutputTy);
3811 }
3812 case phases::Compile: {
3813 if (Args.hasArg(options::OPT_fsyntax_only))
3814 return C.MakeAction<CompileJobAction>(Input, types::TY_Nothing);
3815 if (Args.hasArg(options::OPT_rewrite_objc))
3816 return C.MakeAction<CompileJobAction>(Input, types::TY_RewrittenObjC);
3817 if (Args.hasArg(options::OPT_rewrite_legacy_objc))
3818 return C.MakeAction<CompileJobAction>(Input,
3819 types::TY_RewrittenLegacyObjC);
3820 if (Args.hasArg(options::OPT__analyze))
3821 return C.MakeAction<AnalyzeJobAction>(Input, types::TY_Plist);
3822 if (Args.hasArg(options::OPT__migrate))
3823 return C.MakeAction<MigrateJobAction>(Input, types::TY_Remap);
3824 if (Args.hasArg(options::OPT_emit_ast))
3825 return C.MakeAction<CompileJobAction>(Input, types::TY_AST);
3826 if (Args.hasArg(options::OPT_module_file_info))
3827 return C.MakeAction<CompileJobAction>(Input, types::TY_ModuleFile);
3828 if (Args.hasArg(options::OPT_verify_pch))
3829 return C.MakeAction<VerifyPCHJobAction>(Input, types::TY_Nothing);
3830 return C.MakeAction<CompileJobAction>(Input, types::TY_LLVM_BC);
3831 }
3832 case phases::Backend: {
3833 if (isUsingLTO() && TargetDeviceOffloadKind == Action::OFK_None) {
3834 types::ID Output =
3835 Args.hasArg(options::OPT_S) ? types::TY_LTO_IR : types::TY_LTO_BC;
3836 return C.MakeAction<BackendJobAction>(Input, Output);
3837 }
3838 if (Args.hasArg(options::OPT_emit_llvm) ||
3839 (TargetDeviceOffloadKind == Action::OFK_HIP &&
3840 Args.hasFlag(options::OPT_fgpu_rdc, options::OPT_fno_gpu_rdc,
3841 false))) {
3842 types::ID Output =
3843 Args.hasArg(options::OPT_S) ? types::TY_LLVM_IR : types::TY_LLVM_BC;
3844 return C.MakeAction<BackendJobAction>(Input, Output);
3845 }
3846 return C.MakeAction<BackendJobAction>(Input, types::TY_PP_Asm);
3847 }
3848 case phases::Assemble:
3849 return C.MakeAction<AssembleJobAction>(std::move(Input), types::TY_Object);
3850 }
3851
3852 llvm_unreachable("invalid phase in ConstructPhaseAction")::llvm::llvm_unreachable_internal("invalid phase in ConstructPhaseAction"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 3852)
;
3853}
3854
3855void Driver::BuildJobs(Compilation &C) const {
3856 llvm::PrettyStackTraceString CrashInfo("Building compilation jobs");
3857
3858 Arg *FinalOutput = C.getArgs().getLastArg(options::OPT_o);
3859
3860 // It is an error to provide a -o option if we are making multiple output
3861 // files. There are exceptions:
3862 //
3863 // IfsMergeJob: when generating interface stubs enabled we want to be able to
3864 // generate the stub file at the same time that we generate the real
3865 // library/a.out. So when a .o, .so, etc are the output, with clang interface
3866 // stubs there will also be a .ifs and .ifso at the same location.
3867 //
3868 // CompileJob of type TY_IFS_CPP: when generating interface stubs is enabled
3869 // and -c is passed, we still want to be able to generate a .ifs file while
3870 // we are also generating .o files. So we allow more than one output file in
3871 // this case as well.
3872 //
3873 if (FinalOutput) {
3874 unsigned NumOutputs = 0;
3875 unsigned NumIfsOutputs = 0;
3876 for (const Action *A : C.getActions())
3877 if (A->getType() != types::TY_Nothing &&
3878 !(A->getKind() == Action::IfsMergeJobClass ||
3879 (A->getType() == clang::driver::types::TY_IFS_CPP &&
3880 A->getKind() == clang::driver::Action::CompileJobClass &&
3881 0 == NumIfsOutputs++) ||
3882 (A->getKind() == Action::BindArchClass && A->getInputs().size() &&
3883 A->getInputs().front()->getKind() == Action::IfsMergeJobClass)))
3884 ++NumOutputs;
3885
3886 if (NumOutputs > 1) {
3887 Diag(clang::diag::err_drv_output_argument_with_multiple_files);
3888 FinalOutput = nullptr;
3889 }
3890 }
3891
3892 const llvm::Triple &RawTriple = C.getDefaultToolChain().getTriple();
3893 if (RawTriple.isOSAIX())
3894 if (Arg *A = C.getArgs().getLastArg(options::OPT_G))
3895 Diag(diag::err_drv_unsupported_opt_for_target)
3896 << A->getSpelling() << RawTriple.str();
3897
3898 // Collect the list of architectures.
3899 llvm::StringSet<> ArchNames;
3900 if (RawTriple.isOSBinFormatMachO())
3901 for (const Arg *A : C.getArgs())
3902 if (A->getOption().matches(options::OPT_arch))
3903 ArchNames.insert(A->getValue());
3904
3905 // Set of (Action, canonical ToolChain triple) pairs we've built jobs for.
3906 std::map<std::pair<const Action *, std::string>, InputInfo> CachedResults;
3907 for (Action *A : C.getActions()) {
3908 // If we are linking an image for multiple archs then the linker wants
3909 // -arch_multiple and -final_output <final image name>. Unfortunately, this
3910 // doesn't fit in cleanly because we have to pass this information down.
3911 //
3912 // FIXME: This is a hack; find a cleaner way to integrate this into the
3913 // process.
3914 const char *LinkingOutput = nullptr;
3915 if (isa<LipoJobAction>(A)) {
3916 if (FinalOutput)
3917 LinkingOutput = FinalOutput->getValue();
3918 else
3919 LinkingOutput = getDefaultImageName();
3920 }
3921
3922 BuildJobsForAction(C, A, &C.getDefaultToolChain(),
3923 /*BoundArch*/ StringRef(),
3924 /*AtTopLevel*/ true,
3925 /*MultipleArchs*/ ArchNames.size() > 1,
3926 /*LinkingOutput*/ LinkingOutput, CachedResults,
3927 /*TargetDeviceOffloadKind*/ Action::OFK_None);
3928 }
3929
3930 StringRef StatReportFile;
3931 bool PrintProcessStat = false;
3932 if (const Arg *A = C.getArgs().getLastArg(options::OPT_fproc_stat_report_EQ))
3933 StatReportFile = A->getValue();
3934 if (C.getArgs().hasArg(options::OPT_fproc_stat_report))
3935 PrintProcessStat = true;
3936
3937 // If we have more than one job, then disable integrated-cc1 for now. Do this
3938 // also when we need to report process execution statistics.
3939 if (C.getJobs().size() > 1 || !StatReportFile.empty() || PrintProcessStat)
3940 for (auto &J : C.getJobs())
3941 J.InProcess = false;
3942
3943 if (!StatReportFile.empty() || PrintProcessStat) {
3944 C.setPostCallback([=](const Command &Cmd, int Res) {
3945 Optional<llvm::sys::ProcessStatistics> ProcStat =
3946 Cmd.getProcessStatistics();
3947 if (!ProcStat)
3948 return;
3949 if (PrintProcessStat) {
3950 using namespace llvm;
3951 // Human readable output.
3952 outs() << sys::path::filename(Cmd.getExecutable()) << ": "
3953 << "output=";
3954 if (Cmd.getOutputFilenames().empty())
3955 outs() << "\"\"";
3956 else
3957 outs() << Cmd.getOutputFilenames().front();
3958 outs() << ", total="
3959 << format("%.3f", ProcStat->TotalTime.count() / 1000.) << " ms"
3960 << ", user="
3961 << format("%.3f", ProcStat->UserTime.count() / 1000.) << " ms"
3962 << ", mem=" << ProcStat->PeakMemory << " Kb\n";
3963 }
3964 if (!StatReportFile.empty()) {
3965 // CSV format.
3966 std::string Buffer;
3967 llvm::raw_string_ostream Out(Buffer);
3968 llvm::sys::printArg(Out, llvm::sys::path::filename(Cmd.getExecutable()),
3969 /*Quote*/ true);
3970 Out << ',';
3971 if (Cmd.getOutputFilenames().empty())
3972 Out << "\"\"";
3973 else
3974 llvm::sys::printArg(Out, Cmd.getOutputFilenames().front(), true);
3975 Out << ',' << ProcStat->TotalTime.count() << ','
3976 << ProcStat->UserTime.count() << ',' << ProcStat->PeakMemory
3977 << '\n';
3978 Out.flush();
3979 std::error_code EC;
3980 llvm::raw_fd_ostream OS(StatReportFile, EC, llvm::sys::fs::OF_Append);
3981 if (EC)
3982 return;
3983 auto L = OS.lock();
3984 if (!L) {
3985 llvm::errs() << "ERROR: Cannot lock file " << StatReportFile << ": "
3986 << toString(L.takeError()) << "\n";
3987 return;
3988 }
3989 OS << Buffer;
3990 }
3991 });
3992 }
3993
3994 // If the user passed -Qunused-arguments or there were errors, don't warn
3995 // about any unused arguments.
3996 if (Diags.hasErrorOccurred() ||
3997 C.getArgs().hasArg(options::OPT_Qunused_arguments))
3998 return;
3999
4000 // Claim -### here.
4001 (void)C.getArgs().hasArg(options::OPT__HASH_HASH_HASH);
4002
4003 // Claim --driver-mode, --rsp-quoting, it was handled earlier.
4004 (void)C.getArgs().hasArg(options::OPT_driver_mode);
4005 (void)C.getArgs().hasArg(options::OPT_rsp_quoting);
4006
4007 for (Arg *A : C.getArgs()) {
4008 // FIXME: It would be nice to be able to send the argument to the
4009 // DiagnosticsEngine, so that extra values, position, and so on could be
4010 // printed.
4011 if (!A->isClaimed()) {
4012 if (A->getOption().hasFlag(options::NoArgumentUnused))
4013 continue;
4014
4015 // Suppress the warning automatically if this is just a flag, and it is an
4016 // instance of an argument we already claimed.
4017 const Option &Opt = A->getOption();
4018 if (Opt.getKind() == Option::FlagClass) {
4019 bool DuplicateClaimed = false;
4020
4021 for (const Arg *AA : C.getArgs().filtered(&Opt)) {
4022 if (AA->isClaimed()) {
4023 DuplicateClaimed = true;
4024 break;
4025 }
4026 }
4027
4028 if (DuplicateClaimed)
4029 continue;
4030 }
4031
4032 // In clang-cl, don't mention unknown arguments here since they have
4033 // already been warned about.
4034 if (!IsCLMode() || !A->getOption().matches(options::OPT_UNKNOWN))
4035 Diag(clang::diag::warn_drv_unused_argument)
4036 << A->getAsString(C.getArgs());
4037 }
4038 }
4039}
4040
4041namespace {
4042/// Utility class to control the collapse of dependent actions and select the
4043/// tools accordingly.
4044class ToolSelector final {
4045 /// The tool chain this selector refers to.
4046 const ToolChain &TC;
4047
4048 /// The compilation this selector refers to.
4049 const Compilation &C;
4050
4051 /// The base action this selector refers to.
4052 const JobAction *BaseAction;
4053
4054 /// Set to true if the current toolchain refers to host actions.
4055 bool IsHostSelector;
4056
4057 /// Set to true if save-temps and embed-bitcode functionalities are active.
4058 bool SaveTemps;
4059 bool EmbedBitcode;
4060
4061 /// Get previous dependent action or null if that does not exist. If
4062 /// \a CanBeCollapsed is false, that action must be legal to collapse or
4063 /// null will be returned.
4064 const JobAction *getPrevDependentAction(const ActionList &Inputs,
4065 ActionList &SavedOffloadAction,
4066 bool CanBeCollapsed = true) {
4067 // An option can be collapsed only if it has a single input.
4068 if (Inputs.size() != 1)
4069 return nullptr;
4070
4071 Action *CurAction = *Inputs.begin();
4072 if (CanBeCollapsed &&
4073 !CurAction->isCollapsingWithNextDependentActionLegal())
4074 return nullptr;
4075
4076 // If the input action is an offload action. Look through it and save any
4077 // offload action that can be dropped in the event of a collapse.
4078 if (auto *OA = dyn_cast<OffloadAction>(CurAction)) {
4079 // If the dependent action is a device action, we will attempt to collapse
4080 // only with other device actions. Otherwise, we would do the same but
4081 // with host actions only.
4082 if (!IsHostSelector) {
4083 if (OA->hasSingleDeviceDependence(/*DoNotConsiderHostActions=*/true)) {
4084 CurAction =
4085 OA->getSingleDeviceDependence(/*DoNotConsiderHostActions=*/true);
4086 if (CanBeCollapsed &&
4087 !CurAction->isCollapsingWithNextDependentActionLegal())
4088 return nullptr;
4089 SavedOffloadAction.push_back(OA);
4090 return dyn_cast<JobAction>(CurAction);
4091 }
4092 } else if (OA->hasHostDependence()) {
4093 CurAction = OA->getHostDependence();
4094 if (CanBeCollapsed &&
4095 !CurAction->isCollapsingWithNextDependentActionLegal())
4096 return nullptr;
4097 SavedOffloadAction.push_back(OA);
4098 return dyn_cast<JobAction>(CurAction);
4099 }
4100 return nullptr;
4101 }
4102
4103 return dyn_cast<JobAction>(CurAction);
4104 }
4105
4106 /// Return true if an assemble action can be collapsed.
4107 bool canCollapseAssembleAction() const {
4108 return TC.useIntegratedAs() && !SaveTemps &&
4109 !C.getArgs().hasArg(options::OPT_via_file_asm) &&
4110 !C.getArgs().hasArg(options::OPT__SLASH_FA) &&
4111 !C.getArgs().hasArg(options::OPT__SLASH_Fa);
4112 }
4113
4114 /// Return true if a preprocessor action can be collapsed.
4115 bool canCollapsePreprocessorAction() const {
4116 return !C.getArgs().hasArg(options::OPT_no_integrated_cpp) &&
4117 !C.getArgs().hasArg(options::OPT_traditional_cpp) && !SaveTemps &&
4118 !C.getArgs().hasArg(options::OPT_rewrite_objc);
4119 }
4120
4121 /// Struct that relates an action with the offload actions that would be
4122 /// collapsed with it.
4123 struct JobActionInfo final {
4124 /// The action this info refers to.
4125 const JobAction *JA = nullptr;
4126 /// The offload actions we need to take care off if this action is
4127 /// collapsed.
4128 ActionList SavedOffloadAction;
4129 };
4130
4131 /// Append collapsed offload actions from the give nnumber of elements in the
4132 /// action info array.
4133 static void AppendCollapsedOffloadAction(ActionList &CollapsedOffloadAction,
4134 ArrayRef<JobActionInfo> &ActionInfo,
4135 unsigned ElementNum) {
4136 assert(ElementNum <= ActionInfo.size() && "Invalid number of elements.")((ElementNum <= ActionInfo.size() && "Invalid number of elements."
) ? static_cast<void> (0) : __assert_fail ("ElementNum <= ActionInfo.size() && \"Invalid number of elements.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 4136, __PRETTY_FUNCTION__))
;
4137 for (unsigned I = 0; I < ElementNum; ++I)
4138 CollapsedOffloadAction.append(ActionInfo[I].SavedOffloadAction.begin(),
4139 ActionInfo[I].SavedOffloadAction.end());
4140 }
4141
4142 /// Functions that attempt to perform the combining. They detect if that is
4143 /// legal, and if so they update the inputs \a Inputs and the offload action
4144 /// that were collapsed in \a CollapsedOffloadAction. A tool that deals with
4145 /// the combined action is returned. If the combining is not legal or if the
4146 /// tool does not exist, null is returned.
4147 /// Currently three kinds of collapsing are supported:
4148 /// - Assemble + Backend + Compile;
4149 /// - Assemble + Backend ;
4150 /// - Backend + Compile.
4151 const Tool *
4152 combineAssembleBackendCompile(ArrayRef<JobActionInfo> ActionInfo,
4153 ActionList &Inputs,
4154 ActionList &CollapsedOffloadAction) {
4155 if (ActionInfo.size() < 3 || !canCollapseAssembleAction())
4156 return nullptr;
4157 auto *AJ = dyn_cast<AssembleJobAction>(ActionInfo[0].JA);
4158 auto *BJ = dyn_cast<BackendJobAction>(ActionInfo[1].JA);
4159 auto *CJ = dyn_cast<CompileJobAction>(ActionInfo[2].JA);
4160 if (!AJ || !BJ || !CJ)
4161 return nullptr;
4162
4163 // Get compiler tool.
4164 const Tool *T = TC.SelectTool(*CJ);
4165 if (!T)
4166 return nullptr;
4167
4168 // When using -fembed-bitcode, it is required to have the same tool (clang)
4169 // for both CompilerJA and BackendJA. Otherwise, combine two stages.
4170 if (EmbedBitcode) {
4171 const Tool *BT = TC.SelectTool(*BJ);
4172 if (BT == T)
4173 return nullptr;
4174 }
4175
4176 if (!T->hasIntegratedAssembler())
4177 return nullptr;
4178
4179 Inputs = CJ->getInputs();
4180 AppendCollapsedOffloadAction(CollapsedOffloadAction, ActionInfo,
4181 /*NumElements=*/3);
4182 return T;
4183 }
4184 const Tool *combineAssembleBackend(ArrayRef<JobActionInfo> ActionInfo,
4185 ActionList &Inputs,
4186 ActionList &CollapsedOffloadAction) {
4187 if (ActionInfo.size() < 2 || !canCollapseAssembleAction())
4188 return nullptr;
4189 auto *AJ = dyn_cast<AssembleJobAction>(ActionInfo[0].JA);
4190 auto *BJ = dyn_cast<BackendJobAction>(ActionInfo[1].JA);
4191 if (!AJ || !BJ)
4192 return nullptr;
4193
4194 // Get backend tool.
4195 const Tool *T = TC.SelectTool(*BJ);
4196 if (!T)
4197 return nullptr;
4198
4199 if (!T->hasIntegratedAssembler())
4200 return nullptr;
4201
4202 Inputs = BJ->getInputs();
4203 AppendCollapsedOffloadAction(CollapsedOffloadAction, ActionInfo,
4204 /*NumElements=*/2);
4205 return T;
4206 }
4207 const Tool *combineBackendCompile(ArrayRef<JobActionInfo> ActionInfo,
4208 ActionList &Inputs,
4209 ActionList &CollapsedOffloadAction) {
4210 if (ActionInfo.size() < 2)
4211 return nullptr;
4212 auto *BJ = dyn_cast<BackendJobAction>(ActionInfo[0].JA);
4213 auto *CJ = dyn_cast<CompileJobAction>(ActionInfo[1].JA);
4214 if (!BJ || !CJ)
4215 return nullptr;
4216
4217 // Check if the initial input (to the compile job or its predessor if one
4218 // exists) is LLVM bitcode. In that case, no preprocessor step is required
4219 // and we can still collapse the compile and backend jobs when we have
4220 // -save-temps. I.e. there is no need for a separate compile job just to
4221 // emit unoptimized bitcode.
4222 bool InputIsBitcode = true;
4223 for (size_t i = 1; i < ActionInfo.size(); i++)
4224 if (ActionInfo[i].JA->getType() != types::TY_LLVM_BC &&
4225 ActionInfo[i].JA->getType() != types::TY_LTO_BC) {
4226 InputIsBitcode = false;
4227 break;
4228 }
4229 if (!InputIsBitcode && !canCollapsePreprocessorAction())
4230 return nullptr;
4231
4232 // Get compiler tool.
4233 const Tool *T = TC.SelectTool(*CJ);
4234 if (!T)
4235 return nullptr;
4236
4237 if (T->canEmitIR() && ((SaveTemps && !InputIsBitcode) || EmbedBitcode))
4238 return nullptr;
4239
4240 Inputs = CJ->getInputs();
4241 AppendCollapsedOffloadAction(CollapsedOffloadAction, ActionInfo,
4242 /*NumElements=*/2);
4243 return T;
4244 }
4245
4246 /// Updates the inputs if the obtained tool supports combining with
4247 /// preprocessor action, and the current input is indeed a preprocessor
4248 /// action. If combining results in the collapse of offloading actions, those
4249 /// are appended to \a CollapsedOffloadAction.
4250 void combineWithPreprocessor(const Tool *T, ActionList &Inputs,
4251 ActionList &CollapsedOffloadAction) {
4252 if (!T || !canCollapsePreprocessorAction() || !T->hasIntegratedCPP())
4253 return;
4254
4255 // Attempt to get a preprocessor action dependence.
4256 ActionList PreprocessJobOffloadActions;
4257 ActionList NewInputs;
4258 for (Action *A : Inputs) {
4259 auto *PJ = getPrevDependentAction({A}, PreprocessJobOffloadActions);
4260 if (!PJ || !isa<PreprocessJobAction>(PJ)) {
4261 NewInputs.push_back(A);
4262 continue;
4263 }
4264
4265 // This is legal to combine. Append any offload action we found and add the
4266 // current input to preprocessor inputs.
4267 CollapsedOffloadAction.append(PreprocessJobOffloadActions.begin(),
4268 PreprocessJobOffloadActions.end());
4269 NewInputs.append(PJ->input_begin(), PJ->input_end());
4270 }
4271 Inputs = NewInputs;
4272 }
4273
4274public:
4275 ToolSelector(const JobAction *BaseAction, const ToolChain &TC,
4276 const Compilation &C, bool SaveTemps, bool EmbedBitcode)
4277 : TC(TC), C(C), BaseAction(BaseAction), SaveTemps(SaveTemps),
4278 EmbedBitcode(EmbedBitcode) {
4279 assert(BaseAction && "Invalid base action.")((BaseAction && "Invalid base action.") ? static_cast
<void> (0) : __assert_fail ("BaseAction && \"Invalid base action.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 4279, __PRETTY_FUNCTION__))
;
4280 IsHostSelector = BaseAction->getOffloadingDeviceKind() == Action::OFK_None;
4281 }
4282
4283 /// Check if a chain of actions can be combined and return the tool that can
4284 /// handle the combination of actions. The pointer to the current inputs \a
4285 /// Inputs and the list of offload actions \a CollapsedOffloadActions
4286 /// connected to collapsed actions are updated accordingly. The latter enables
4287 /// the caller of the selector to process them afterwards instead of just
4288 /// dropping them. If no suitable tool is found, null will be returned.
4289 const Tool *getTool(ActionList &Inputs,
4290 ActionList &CollapsedOffloadAction) {
4291 //
4292 // Get the largest chain of actions that we could combine.
4293 //
4294
4295 SmallVector<JobActionInfo, 5> ActionChain(1);
4296 ActionChain.back().JA = BaseAction;
4297 while (ActionChain.back().JA) {
4298 const Action *CurAction = ActionChain.back().JA;
4299
4300 // Grow the chain by one element.
4301 ActionChain.resize(ActionChain.size() + 1);
4302 JobActionInfo &AI = ActionChain.back();
4303
4304 // Attempt to fill it with the
4305 AI.JA =
4306 getPrevDependentAction(CurAction->getInputs(), AI.SavedOffloadAction);
4307 }
4308
4309 // Pop the last action info as it could not be filled.
4310 ActionChain.pop_back();
4311
4312 //
4313 // Attempt to combine actions. If all combining attempts failed, just return
4314 // the tool of the provided action. At the end we attempt to combine the
4315 // action with any preprocessor action it may depend on.
4316 //
4317
4318 const Tool *T = combineAssembleBackendCompile(ActionChain, Inputs,
4319 CollapsedOffloadAction);
4320 if (!T)
4321 T = combineAssembleBackend(ActionChain, Inputs, CollapsedOffloadAction);
4322 if (!T)
4323 T = combineBackendCompile(ActionChain, Inputs, CollapsedOffloadAction);
4324 if (!T) {
4325 Inputs = BaseAction->getInputs();
4326 T = TC.SelectTool(*BaseAction);
4327 }
4328
4329 combineWithPreprocessor(T, Inputs, CollapsedOffloadAction);
4330 return T;
4331 }
4332};
4333}
4334
4335/// Return a string that uniquely identifies the result of a job. The bound arch
4336/// is not necessarily represented in the toolchain's triple -- for example,
4337/// armv7 and armv7s both map to the same triple -- so we need both in our map.
4338/// Also, we need to add the offloading device kind, as the same tool chain can
4339/// be used for host and device for some programming models, e.g. OpenMP.
4340static std::string GetTriplePlusArchString(const ToolChain *TC,
4341 StringRef BoundArch,
4342 Action::OffloadKind OffloadKind) {
4343 std::string TriplePlusArch = TC->getTriple().normalize();
4344 if (!BoundArch.empty()) {
4345 TriplePlusArch += "-";
4346 TriplePlusArch += BoundArch;
4347 }
4348 TriplePlusArch += "-";
4349 TriplePlusArch += Action::GetOffloadKindName(OffloadKind);
4350 return TriplePlusArch;
4351}
4352
4353InputInfo Driver::BuildJobsForAction(
4354 Compilation &C, const Action *A, const ToolChain *TC, StringRef BoundArch,
4355 bool AtTopLevel, bool MultipleArchs, const char *LinkingOutput,
4356 std::map<std::pair<const Action *, std::string>, InputInfo> &CachedResults,
4357 Action::OffloadKind TargetDeviceOffloadKind) const {
4358 std::pair<const Action *, std::string> ActionTC = {
4359 A, GetTriplePlusArchString(TC, BoundArch, TargetDeviceOffloadKind)};
4360 auto CachedResult = CachedResults.find(ActionTC);
4361 if (CachedResult != CachedResults.end()) {
4362 return CachedResult->second;
4363 }
4364 InputInfo Result = BuildJobsForActionNoCache(
4365 C, A, TC, BoundArch, AtTopLevel, MultipleArchs, LinkingOutput,
4366 CachedResults, TargetDeviceOffloadKind);
4367 CachedResults[ActionTC] = Result;
4368 return Result;
4369}
4370
4371InputInfo Driver::BuildJobsForActionNoCache(
4372 Compilation &C, const Action *A, const ToolChain *TC, StringRef BoundArch,
4373 bool AtTopLevel, bool MultipleArchs, const char *LinkingOutput,
4374 std::map<std::pair<const Action *, std::string>, InputInfo> &CachedResults,
4375 Action::OffloadKind TargetDeviceOffloadKind) const {
4376 llvm::PrettyStackTraceString CrashInfo("Building compilation jobs");
4377
4378 InputInfoList OffloadDependencesInputInfo;
4379 bool BuildingForOffloadDevice = TargetDeviceOffloadKind != Action::OFK_None;
4380 if (const OffloadAction *OA = dyn_cast<OffloadAction>(A)) {
4381 // The 'Darwin' toolchain is initialized only when its arguments are
4382 // computed. Get the default arguments for OFK_None to ensure that
4383 // initialization is performed before processing the offload action.
4384 // FIXME: Remove when darwin's toolchain is initialized during construction.
4385 C.getArgsForToolChain(TC, BoundArch, Action::OFK_None);
4386
4387 // The offload action is expected to be used in four different situations.
4388 //
4389 // a) Set a toolchain/architecture/kind for a host action:
4390 // Host Action 1 -> OffloadAction -> Host Action 2
4391 //
4392 // b) Set a toolchain/architecture/kind for a device action;
4393 // Device Action 1 -> OffloadAction -> Device Action 2
4394 //
4395 // c) Specify a device dependence to a host action;
4396 // Device Action 1 _
4397 // \
4398 // Host Action 1 ---> OffloadAction -> Host Action 2
4399 //
4400 // d) Specify a host dependence to a device action.
4401 // Host Action 1 _
4402 // \
4403 // Device Action 1 ---> OffloadAction -> Device Action 2
4404 //
4405 // For a) and b), we just return the job generated for the dependence. For
4406 // c) and d) we override the current action with the host/device dependence
4407 // if the current toolchain is host/device and set the offload dependences
4408 // info with the jobs obtained from the device/host dependence(s).
4409
4410 // If there is a single device option, just generate the job for it.
4411 if (OA->hasSingleDeviceDependence()) {
4412 InputInfo DevA;
4413 OA->doOnEachDeviceDependence([&](Action *DepA, const ToolChain *DepTC,
4414 const char *DepBoundArch) {
4415 DevA =
4416 BuildJobsForAction(C, DepA, DepTC, DepBoundArch, AtTopLevel,
4417 /*MultipleArchs*/ !!DepBoundArch, LinkingOutput,
4418 CachedResults, DepA->getOffloadingDeviceKind());
4419 });
4420 return DevA;
4421 }
4422
4423 // If 'Action 2' is host, we generate jobs for the device dependences and
4424 // override the current action with the host dependence. Otherwise, we
4425 // generate the host dependences and override the action with the device
4426 // dependence. The dependences can't therefore be a top-level action.
4427 OA->doOnEachDependence(
4428 /*IsHostDependence=*/BuildingForOffloadDevice,
4429 [&](Action *DepA, const ToolChain *DepTC, const char *DepBoundArch) {
4430 OffloadDependencesInputInfo.push_back(BuildJobsForAction(
4431 C, DepA, DepTC, DepBoundArch, /*AtTopLevel=*/false,
4432 /*MultipleArchs*/ !!DepBoundArch, LinkingOutput, CachedResults,
4433 DepA->getOffloadingDeviceKind()));
4434 });
4435
4436 A = BuildingForOffloadDevice
4437 ? OA->getSingleDeviceDependence(/*DoNotConsiderHostActions=*/true)
4438 : OA->getHostDependence();
4439 }
4440
4441 if (const InputAction *IA = dyn_cast<InputAction>(A)) {
4442 // FIXME: It would be nice to not claim this here; maybe the old scheme of
4443 // just using Args was better?
4444 const Arg &Input = IA->getInputArg();
4445 Input.claim();
4446 if (Input.getOption().matches(options::OPT_INPUT)) {
4447 const char *Name = Input.getValue();
4448 return InputInfo(A, Name, /* _BaseInput = */ Name);
4449 }
4450 return InputInfo(A, &Input, /* _BaseInput = */ "");
4451 }
4452
4453 if (const BindArchAction *BAA = dyn_cast<BindArchAction>(A)) {
4454 const ToolChain *TC;
4455 StringRef ArchName = BAA->getArchName();
4456
4457 if (!ArchName.empty())
4458 TC = &getToolChain(C.getArgs(),
4459 computeTargetTriple(*this, TargetTriple,
4460 C.getArgs(), ArchName));
4461 else
4462 TC = &C.getDefaultToolChain();
4463
4464 return BuildJobsForAction(C, *BAA->input_begin(), TC, ArchName, AtTopLevel,
4465 MultipleArchs, LinkingOutput, CachedResults,
4466 TargetDeviceOffloadKind);
4467 }
4468
4469
4470 ActionList Inputs = A->getInputs();
4471
4472 const JobAction *JA = cast<JobAction>(A);
4473 ActionList CollapsedOffloadActions;
4474
4475 ToolSelector TS(JA, *TC, C, isSaveTempsEnabled(),
4476 embedBitcodeInObject() && !isUsingLTO());
4477 const Tool *T = TS.getTool(Inputs, CollapsedOffloadActions);
4478
4479 if (!T)
4480 return InputInfo();
4481
4482 // If we've collapsed action list that contained OffloadAction we
4483 // need to build jobs for host/device-side inputs it may have held.
4484 for (const auto *OA : CollapsedOffloadActions)
4485 cast<OffloadAction>(OA)->doOnEachDependence(
4486 /*IsHostDependence=*/BuildingForOffloadDevice,
4487 [&](Action *DepA, const ToolChain *DepTC, const char *DepBoundArch) {
4488 OffloadDependencesInputInfo.push_back(BuildJobsForAction(
4489 C, DepA, DepTC, DepBoundArch, /* AtTopLevel */ false,
4490 /*MultipleArchs=*/!!DepBoundArch, LinkingOutput, CachedResults,
4491 DepA->getOffloadingDeviceKind()));
4492 });
4493
4494 // Only use pipes when there is exactly one input.
4495 InputInfoList InputInfos;
4496 for (const Action *Input : Inputs) {
4497 // Treat dsymutil and verify sub-jobs as being at the top-level too, they
4498 // shouldn't get temporary output names.
4499 // FIXME: Clean this up.
4500 bool SubJobAtTopLevel =
4501 AtTopLevel && (isa<DsymutilJobAction>(A) || isa<VerifyJobAction>(A));
4502 InputInfos.push_back(BuildJobsForAction(
4503 C, Input, TC, BoundArch, SubJobAtTopLevel, MultipleArchs, LinkingOutput,
4504 CachedResults, A->getOffloadingDeviceKind()));
4505 }
4506
4507 // Always use the first input as the base input.
4508 const char *BaseInput = InputInfos[0].getBaseInput();
4509
4510 // ... except dsymutil actions, which use their actual input as the base
4511 // input.
4512 if (JA->getType() == types::TY_dSYM)
4513 BaseInput = InputInfos[0].getFilename();
4514
4515 // ... and in header module compilations, which use the module name.
4516 if (auto *ModuleJA = dyn_cast<HeaderModulePrecompileJobAction>(JA))
4517 BaseInput = ModuleJA->getModuleName();
4518
4519 // Append outputs of offload device jobs to the input list
4520 if (!OffloadDependencesInputInfo.empty())
4521 InputInfos.append(OffloadDependencesInputInfo.begin(),
4522 OffloadDependencesInputInfo.end());
4523
4524 // Set the effective triple of the toolchain for the duration of this job.
4525 llvm::Triple EffectiveTriple;
4526 const ToolChain &ToolTC = T->getToolChain();
4527 const ArgList &Args =
4528 C.getArgsForToolChain(TC, BoundArch, A->getOffloadingDeviceKind());
4529 if (InputInfos.size() != 1) {
4530 EffectiveTriple = llvm::Triple(ToolTC.ComputeEffectiveClangTriple(Args));
4531 } else {
4532 // Pass along the input type if it can be unambiguously determined.
4533 EffectiveTriple = llvm::Triple(
4534 ToolTC.ComputeEffectiveClangTriple(Args, InputInfos[0].getType()));
4535 }
4536 RegisterEffectiveTriple TripleRAII(ToolTC, EffectiveTriple);
4537
4538 // Determine the place to write output to, if any.
4539 InputInfo Result;
4540 InputInfoList UnbundlingResults;
4541 if (auto *UA = dyn_cast<OffloadUnbundlingJobAction>(JA)) {
4542 // If we have an unbundling job, we need to create results for all the
4543 // outputs. We also update the results cache so that other actions using
4544 // this unbundling action can get the right results.
4545 for (auto &UI : UA->getDependentActionsInfo()) {
4546 assert(UI.DependentOffloadKind != Action::OFK_None &&((UI.DependentOffloadKind != Action::OFK_None && "Unbundling with no offloading??"
) ? static_cast<void> (0) : __assert_fail ("UI.DependentOffloadKind != Action::OFK_None && \"Unbundling with no offloading??\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 4547, __PRETTY_FUNCTION__))
4547 "Unbundling with no offloading??")((UI.DependentOffloadKind != Action::OFK_None && "Unbundling with no offloading??"
) ? static_cast<void> (0) : __assert_fail ("UI.DependentOffloadKind != Action::OFK_None && \"Unbundling with no offloading??\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 4547, __PRETTY_FUNCTION__))
;
4548
4549 // Unbundling actions are never at the top level. When we generate the
4550 // offloading prefix, we also do that for the host file because the
4551 // unbundling action does not change the type of the output which can
4552 // cause a overwrite.
4553 std::string OffloadingPrefix = Action::GetOffloadingFileNamePrefix(
4554 UI.DependentOffloadKind,
4555 UI.DependentToolChain->getTriple().normalize(),
4556 /*CreatePrefixForHost=*/true);
4557 auto CurI = InputInfo(
4558 UA,
4559 GetNamedOutputPath(C, *UA, BaseInput, UI.DependentBoundArch,
4560 /*AtTopLevel=*/false,
4561 MultipleArchs ||
4562 UI.DependentOffloadKind == Action::OFK_HIP,
4563 OffloadingPrefix),
4564 BaseInput);
4565 // Save the unbundling result.
4566 UnbundlingResults.push_back(CurI);
4567
4568 // Get the unique string identifier for this dependence and cache the
4569 // result.
4570 StringRef Arch;
4571 if (TargetDeviceOffloadKind == Action::OFK_HIP) {
4572 if (UI.DependentOffloadKind == Action::OFK_Host)
4573 Arch = StringRef();
4574 else
4575 Arch = UI.DependentBoundArch;
4576 } else
4577 Arch = BoundArch;
4578
4579 CachedResults[{A, GetTriplePlusArchString(UI.DependentToolChain, Arch,
4580 UI.DependentOffloadKind)}] =
4581 CurI;
4582 }
4583
4584 // Now that we have all the results generated, select the one that should be
4585 // returned for the current depending action.
4586 std::pair<const Action *, std::string> ActionTC = {
4587 A, GetTriplePlusArchString(TC, BoundArch, TargetDeviceOffloadKind)};
4588 assert(CachedResults.find(ActionTC) != CachedResults.end() &&((CachedResults.find(ActionTC) != CachedResults.end() &&
"Result does not exist??") ? static_cast<void> (0) : __assert_fail
("CachedResults.find(ActionTC) != CachedResults.end() && \"Result does not exist??\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 4589, __PRETTY_FUNCTION__))
4589 "Result does not exist??")((CachedResults.find(ActionTC) != CachedResults.end() &&
"Result does not exist??") ? static_cast<void> (0) : __assert_fail
("CachedResults.find(ActionTC) != CachedResults.end() && \"Result does not exist??\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 4589, __PRETTY_FUNCTION__))
;
4590 Result = CachedResults[ActionTC];
4591 } else if (JA->getType() == types::TY_Nothing)
4592 Result = InputInfo(A, BaseInput);
4593 else {
4594 // We only have to generate a prefix for the host if this is not a top-level
4595 // action.
4596 std::string OffloadingPrefix = Action::GetOffloadingFileNamePrefix(
4597 A->getOffloadingDeviceKind(), TC->getTriple().normalize(),
4598 /*CreatePrefixForHost=*/!!A->getOffloadingHostActiveKinds() &&
4599 !AtTopLevel);
4600 if (isa<OffloadWrapperJobAction>(JA)) {
4601 OffloadingPrefix += "-wrapper";
4602 if (Arg *FinalOutput = C.getArgs().getLastArg(options::OPT_o))
4603 BaseInput = FinalOutput->getValue();
4604 else
4605 BaseInput = getDefaultImageName();
4606 }
4607 Result = InputInfo(A, GetNamedOutputPath(C, *JA, BaseInput, BoundArch,
4608 AtTopLevel, MultipleArchs,
4609 OffloadingPrefix),
4610 BaseInput);
4611 }
4612
4613 if (CCCPrintBindings && !CCGenDiagnostics) {
4614 llvm::errs() << "# \"" << T->getToolChain().getTripleString() << '"'
4615 << " - \"" << T->getName() << "\", inputs: [";
4616 for (unsigned i = 0, e = InputInfos.size(); i != e; ++i) {
4617 llvm::errs() << InputInfos[i].getAsString();
4618 if (i + 1 != e)
4619 llvm::errs() << ", ";
4620 }
4621 if (UnbundlingResults.empty())
4622 llvm::errs() << "], output: " << Result.getAsString() << "\n";
4623 else {
4624 llvm::errs() << "], outputs: [";
4625 for (unsigned i = 0, e = UnbundlingResults.size(); i != e; ++i) {
4626 llvm::errs() << UnbundlingResults[i].getAsString();
4627 if (i + 1 != e)
4628 llvm::errs() << ", ";
4629 }
4630 llvm::errs() << "] \n";
4631 }
4632 } else {
4633 if (UnbundlingResults.empty())
4634 T->ConstructJob(
4635 C, *JA, Result, InputInfos,
4636 C.getArgsForToolChain(TC, BoundArch, JA->getOffloadingDeviceKind()),
4637 LinkingOutput);
4638 else
4639 T->ConstructJobMultipleOutputs(
4640 C, *JA, UnbundlingResults, InputInfos,
4641 C.getArgsForToolChain(TC, BoundArch, JA->getOffloadingDeviceKind()),
4642 LinkingOutput);
4643 }
4644 return Result;
4645}
4646
4647const char *Driver::getDefaultImageName() const {
4648 llvm::Triple Target(llvm::Triple::normalize(TargetTriple));
4649 return Target.isOSWindows() ? "a.exe" : "a.out";
4650}
4651
4652/// Create output filename based on ArgValue, which could either be a
4653/// full filename, filename without extension, or a directory. If ArgValue
4654/// does not provide a filename, then use BaseName, and use the extension
4655/// suitable for FileType.
4656static const char *MakeCLOutputFilename(const ArgList &Args, StringRef ArgValue,
4657 StringRef BaseName,
4658 types::ID FileType) {
4659 SmallString<128> Filename = ArgValue;
4660
4661 if (ArgValue.empty()) {
4662 // If the argument is empty, output to BaseName in the current dir.
4663 Filename = BaseName;
4664 } else if (llvm::sys::path::is_separator(Filename.back())) {
4665 // If the argument is a directory, output to BaseName in that dir.
4666 llvm::sys::path::append(Filename, BaseName);
4667 }
4668
4669 if (!llvm::sys::path::has_extension(ArgValue)) {
4670 // If the argument didn't provide an extension, then set it.
4671 const char *Extension = types::getTypeTempSuffix(FileType, true);
4672
4673 if (FileType == types::TY_Image &&
4674 Args.hasArg(options::OPT__SLASH_LD, options::OPT__SLASH_LDd)) {
4675 // The output file is a dll.
4676 Extension = "dll";
4677 }
4678
4679 llvm::sys::path::replace_extension(Filename, Extension);
4680 }
4681
4682 return Args.MakeArgString(Filename.c_str());
4683}
4684
4685static bool HasPreprocessOutput(const Action &JA) {
4686 if (isa<PreprocessJobAction>(JA))
4687 return true;
4688 if (isa<OffloadAction>(JA) && isa<PreprocessJobAction>(JA.getInputs()[0]))
4689 return true;
4690 if (isa<OffloadBundlingJobAction>(JA) &&
4691 HasPreprocessOutput(*(JA.getInputs()[0])))
4692 return true;
4693 return false;
4694}
4695
4696const char *Driver::GetNamedOutputPath(Compilation &C, const JobAction &JA,
4697 const char *BaseInput,
4698 StringRef OrigBoundArch, bool AtTopLevel,
4699 bool MultipleArchs,
4700 StringRef OffloadingPrefix) const {
4701 std::string BoundArch = OrigBoundArch.str();
4702#if defined(_WIN32)
4703 // BoundArch may contains ':', which is invalid in file names on Windows,
4704 // therefore replace it with '%'.
4705 std::replace(BoundArch.begin(), BoundArch.end(), ':', '@');
4706#endif
4707
4708 llvm::PrettyStackTraceString CrashInfo("Computing output path");
4709 // Output to a user requested destination?
4710 if (AtTopLevel && !isa<DsymutilJobAction>(JA) && !isa<VerifyJobAction>(JA)) {
4711 if (Arg *FinalOutput = C.getArgs().getLastArg(options::OPT_o))
4712 return C.addResultFile(FinalOutput->getValue(), &JA);
4713 }
4714
4715 // For /P, preprocess to file named after BaseInput.
4716 if (C.getArgs().hasArg(options::OPT__SLASH_P)) {
4717 assert(AtTopLevel && isa<PreprocessJobAction>(JA))((AtTopLevel && isa<PreprocessJobAction>(JA)) ?
static_cast<void> (0) : __assert_fail ("AtTopLevel && isa<PreprocessJobAction>(JA)"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 4717, __PRETTY_FUNCTION__))
;
4718 StringRef BaseName = llvm::sys::path::filename(BaseInput);
4719 StringRef NameArg;
4720 if (Arg *A = C.getArgs().getLastArg(options::OPT__SLASH_Fi))
4721 NameArg = A->getValue();
4722 return C.addResultFile(
4723 MakeCLOutputFilename(C.getArgs(), NameArg, BaseName, types::TY_PP_C),
4724 &JA);
4725 }
4726
4727 // Default to writing to stdout?
4728 if (AtTopLevel && !CCGenDiagnostics && HasPreprocessOutput(JA)) {
4729 return "-";
4730 }
4731
4732 // Is this the assembly listing for /FA?
4733 if (JA.getType() == types::TY_PP_Asm &&
4734 (C.getArgs().hasArg(options::OPT__SLASH_FA) ||
4735 C.getArgs().hasArg(options::OPT__SLASH_Fa))) {
4736 // Use /Fa and the input filename to determine the asm file name.
4737 StringRef BaseName = llvm::sys::path::filename(BaseInput);
4738 StringRef FaValue = C.getArgs().getLastArgValue(options::OPT__SLASH_Fa);
4739 return C.addResultFile(
4740 MakeCLOutputFilename(C.getArgs(), FaValue, BaseName, JA.getType()),
4741 &JA);
4742 }
4743
4744 // Output to a temporary file?
4745 if ((!AtTopLevel && !isSaveTempsEnabled() &&
4746 !C.getArgs().hasArg(options::OPT__SLASH_Fo)) ||
4747 CCGenDiagnostics) {
4748 StringRef Name = llvm::sys::path::filename(BaseInput);
4749 std::pair<StringRef, StringRef> Split = Name.split('.');
4750 SmallString<128> TmpName;
4751 const char *Suffix = types::getTypeTempSuffix(JA.getType(), IsCLMode());
4752 Arg *A = C.getArgs().getLastArg(options::OPT_fcrash_diagnostics_dir);
4753 if (CCGenDiagnostics && A) {
4754 SmallString<128> CrashDirectory(A->getValue());
4755 if (!getVFS().exists(CrashDirectory))
4756 llvm::sys::fs::create_directories(CrashDirectory);
4757 llvm::sys::path::append(CrashDirectory, Split.first);
4758 const char *Middle = Suffix ? "-%%%%%%." : "-%%%%%%";
4759 std::error_code EC = llvm::sys::fs::createUniqueFile(
4760 CrashDirectory + Middle + Suffix, TmpName);
4761 if (EC) {
4762 Diag(clang::diag::err_unable_to_make_temp) << EC.message();
4763 return "";
4764 }
4765 } else {
4766 TmpName = GetTemporaryPath(Split.first, Suffix);
4767 }
4768 return C.addTempFile(C.getArgs().MakeArgString(TmpName));
4769 }
4770
4771 SmallString<128> BasePath(BaseInput);
4772 SmallString<128> ExternalPath("");
4773 StringRef BaseName;
4774
4775 // Dsymutil actions should use the full path.
4776 if (isa<DsymutilJobAction>(JA) && C.getArgs().hasArg(options::OPT_dsym_dir)) {
4777 ExternalPath += C.getArgs().getLastArg(options::OPT_dsym_dir)->getValue();
4778 // We use posix style here because the tests (specifically
4779 // darwin-dsymutil.c) demonstrate that posix style paths are acceptable
4780 // even on Windows and if we don't then the similar test covering this
4781 // fails.
4782 llvm::sys::path::append(ExternalPath, llvm::sys::path::Style::posix,
4783 llvm::sys::path::filename(BasePath));
4784 BaseName = ExternalPath;
4785 } else if (isa<DsymutilJobAction>(JA) || isa<VerifyJobAction>(JA))
4786 BaseName = BasePath;
4787 else
4788 BaseName = llvm::sys::path::filename(BasePath);
4789
4790 // Determine what the derived output name should be.
4791 const char *NamedOutput;
4792
4793 if ((JA.getType() == types::TY_Object || JA.getType() == types::TY_LTO_BC) &&
4794 C.getArgs().hasArg(options::OPT__SLASH_Fo, options::OPT__SLASH_o)) {
4795 // The /Fo or /o flag decides the object filename.
4796 StringRef Val =
4797 C.getArgs()
4798 .getLastArg(options::OPT__SLASH_Fo, options::OPT__SLASH_o)
4799 ->getValue();
4800 NamedOutput =
4801 MakeCLOutputFilename(C.getArgs(), Val, BaseName, types::TY_Object);
4802 } else if (JA.getType() == types::TY_Image &&
4803 C.getArgs().hasArg(options::OPT__SLASH_Fe,
4804 options::OPT__SLASH_o)) {
4805 // The /Fe or /o flag names the linked file.
4806 StringRef Val =
4807 C.getArgs()
4808 .getLastArg(options::OPT__SLASH_Fe, options::OPT__SLASH_o)
4809 ->getValue();
4810 NamedOutput =
4811 MakeCLOutputFilename(C.getArgs(), Val, BaseName, types::TY_Image);
4812 } else if (JA.getType() == types::TY_Image) {
4813 if (IsCLMode()) {
4814 // clang-cl uses BaseName for the executable name.
4815 NamedOutput =
4816 MakeCLOutputFilename(C.getArgs(), "", BaseName, types::TY_Image);
4817 } else {
4818 SmallString<128> Output(getDefaultImageName());
4819 // HIP image for device compilation with -fno-gpu-rdc is per compilation
4820 // unit.
4821 bool IsHIPNoRDC = JA.getOffloadingDeviceKind() == Action::OFK_HIP &&
4822 !C.getArgs().hasFlag(options::OPT_fgpu_rdc,
4823 options::OPT_fno_gpu_rdc, false);
4824 if (IsHIPNoRDC) {
4825 Output = BaseName;
4826 llvm::sys::path::replace_extension(Output, "");
4827 }
4828 Output += OffloadingPrefix;
4829 if (MultipleArchs && !BoundArch.empty()) {
4830 Output += "-";
4831 Output.append(BoundArch);
4832 }
4833 if (IsHIPNoRDC)
4834 Output += ".out";
4835 NamedOutput = C.getArgs().MakeArgString(Output.c_str());
4836 }
4837 } else if (JA.getType() == types::TY_PCH && IsCLMode()) {
4838 NamedOutput = C.getArgs().MakeArgString(GetClPchPath(C, BaseName));
4839 } else {
4840 const char *Suffix = types::getTypeTempSuffix(JA.getType(), IsCLMode());
4841 assert(Suffix && "All types used for output should have a suffix.")((Suffix && "All types used for output should have a suffix."
) ? static_cast<void> (0) : __assert_fail ("Suffix && \"All types used for output should have a suffix.\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/Driver/Driver.cpp"
, 4841, __PRETTY_FUNCTION__))
;
4842
4843 std::string::size_type End = std::string::npos;
4844 if (!types::appendSuffixForType(JA.getType()))
4845 End = BaseName.rfind('.');
4846 SmallString<128> Suffixed(BaseName.substr(0, End));
4847 Suffixed += OffloadingPrefix;
4848 if (MultipleArchs && !BoundArch.empty()) {
4849 Suffixed += "-";
4850 Suffixed.append(BoundArch);
4851 }
4852 // When using both -save-temps and -emit-llvm, use a ".tmp.bc" suffix for
4853 // the unoptimized bitcode so that it does not get overwritten by the ".bc"
4854 // optimized bitcode output.
4855 auto IsHIPRDCInCompilePhase = [](const JobAction &JA,
4856 const llvm::opt::DerivedArgList &Args) {
4857 // The relocatable compilation in HIP implies -emit-llvm. Similarly, use a
4858 // ".tmp.bc" suffix for the unoptimized bitcode (generated in the compile
4859 // phase.)
4860 return isa<CompileJobAction>(JA) &&
4861 JA.getOffloadingDeviceKind() == Action::OFK_HIP &&
4862 Args.hasFlag(options::OPT_fgpu_rdc, options::OPT_fno_gpu_rdc,
4863 false);
4864 };
4865 if (!AtTopLevel && JA.getType() == types::TY_LLVM_BC &&
4866 (C.getArgs().hasArg(options::OPT_emit_llvm) ||
4867 IsHIPRDCInCompilePhase(JA, C.getArgs())))
4868 Suffixed += ".tmp";
4869 Suffixed += '.';
4870 Suffixed += Suffix;
4871 NamedOutput = C.getArgs().MakeArgString(Suffixed.c_str());
4872 }
4873
4874 // Prepend object file path if -save-temps=obj
4875 if (!AtTopLevel && isSaveTempsObj() && C.getArgs().hasArg(options::OPT_o) &&
4876 JA.getType() != types::TY_PCH) {
4877 Arg *FinalOutput = C.getArgs().getLastArg(options::OPT_o);
4878 SmallString<128> TempPath(FinalOutput->getValue());
4879 llvm::sys::path::remove_filename(TempPath);
4880 StringRef OutputFileName = llvm::sys::path::filename(NamedOutput);
4881 llvm::sys::path::append(TempPath, OutputFileName);
4882 NamedOutput = C.getArgs().MakeArgString(TempPath.c_str());
4883 }
4884
4885 // If we're saving temps and the temp file conflicts with the input file,
4886 // then avoid overwriting input file.
4887 if (!AtTopLevel && isSaveTempsEnabled() && NamedOutput == BaseName) {
4888 bool SameFile = false;
4889 SmallString<256> Result;
4890 llvm::sys::fs::current_path(Result);
4891 llvm::sys::path::append(Result, BaseName);
4892 llvm::sys::fs::equivalent(BaseInput, Result.c_str(), SameFile);
4893 // Must share the same path to conflict.
4894 if (SameFile) {
4895 StringRef Name = llvm::sys::path::filename(BaseInput);
4896 std::pair<StringRef, StringRef> Split = Name.split('.');
4897 std::string TmpName = GetTemporaryPath(
4898 Split.first, types::getTypeTempSuffix(JA.getType(), IsCLMode()));
4899 return C.addTempFile(C.getArgs().MakeArgString(TmpName));
4900 }
4901 }
4902
4903 // As an annoying special case, PCH generation doesn't strip the pathname.
4904 if (JA.getType() == types::TY_PCH && !IsCLMode()) {
4905 llvm::sys::path::remove_filename(BasePath);
4906 if (BasePath.empty())
4907 BasePath = NamedOutput;
4908 else
4909 llvm::sys::path::append(BasePath, NamedOutput);
4910 return C.addResultFile(C.getArgs().MakeArgString(BasePath.c_str()), &JA);
4911 } else {
4912 return C.addResultFile(NamedOutput, &JA);
4913 }
4914}
4915
4916std::string Driver::GetFilePath(StringRef Name, const ToolChain &TC) const {
4917 // Search for Name in a list of paths.
4918 auto SearchPaths = [&](const llvm::SmallVectorImpl<std::string> &P)
4919 -> llvm::Optional<std::string> {
4920 // Respect a limited subset of the '-Bprefix' functionality in GCC by
4921 // attempting to use this prefix when looking for file paths.
4922 for (const auto &Dir : P) {
4923 if (Dir.empty())
4924 continue;
4925 SmallString<128> P(Dir[0] == '=' ? SysRoot + Dir.substr(1) : Dir);
4926 llvm::sys::path::append(P, Name);
4927 if (llvm::sys::fs::exists(Twine(P)))
4928 return std::string(P);
4929 }
4930 return None;
4931 };
4932
4933 if (auto P = SearchPaths(PrefixDirs))
4934 return *P;
4935
4936 SmallString<128> R(ResourceDir);
4937 llvm::sys::path::append(R, Name);
4938 if (llvm::sys::fs::exists(Twine(R)))
4939 return std::string(R.str());
4940
4941 SmallString<128> P(TC.getCompilerRTPath());
4942 llvm::sys::path::append(P, Name);
4943 if (llvm::sys::fs::exists(Twine(P)))
4944 return std::string(P.str());
4945
4946 SmallString<128> D(Dir);
4947 llvm::sys::path::append(D, "..", Name);
4948 if (llvm::sys::fs::exists(Twine(D)))
4949 return std::string(D.str());
4950
4951 if (auto P = SearchPaths(TC.getLibraryPaths()))
4952 return *P;
4953
4954 if (auto P = SearchPaths(TC.getFilePaths()))
4955 return *P;
4956
4957 return std::string(Name);
4958}
4959
4960void Driver::generatePrefixedToolNames(
4961 StringRef Tool, const ToolChain &TC,
4962 SmallVectorImpl<std::string> &Names) const {
4963 // FIXME: Needs a better variable than TargetTriple
4964 Names.emplace_back((TargetTriple + "-" + Tool).str());
4965 Names.emplace_back(Tool);
4966
4967 // Allow the discovery of tools prefixed with LLVM's default target triple.
4968 std::string DefaultTargetTriple = llvm::sys::getDefaultTargetTriple();
4969 if (DefaultTargetTriple != TargetTriple)
4970 Names.emplace_back((DefaultTargetTriple + "-" + Tool).str());
4971}
4972
4973static bool ScanDirForExecutable(SmallString<128> &Dir, StringRef Name) {
4974 llvm::sys::path::append(Dir, Name);
4975 if (llvm::sys::fs::can_execute(Twine(Dir)))
4976 return true;
4977 llvm::sys::path::remove_filename(Dir);
4978 return false;
4979}
4980
4981std::string Driver::GetProgramPath(StringRef Name, const ToolChain &TC) const {
4982 SmallVector<std::string, 2> TargetSpecificExecutables;
4983 generatePrefixedToolNames(Name, TC, TargetSpecificExecutables);
4984
4985 // Respect a limited subset of the '-Bprefix' functionality in GCC by
4986 // attempting to use this prefix when looking for program paths.
4987 for (const auto &PrefixDir : PrefixDirs) {
4988 if (llvm::sys::fs::is_directory(PrefixDir)) {
4989 SmallString<128> P(PrefixDir);
4990 if (ScanDirForExecutable(P, Name))
4991 return std::string(P.str());
4992 } else {
4993 SmallString<128> P((PrefixDir + Name).str());
4994 if (llvm::sys::fs::can_execute(Twine(P)))
4995 return std::string(P.str());
4996 }
4997 }
4998
4999 const ToolChain::path_list &List = TC.getProgramPaths();
5000 for (const auto &TargetSpecificExecutable : TargetSpecificExecutables) {
5001 // For each possible name of the tool look for it in
5002 // program paths first, then the path.
5003 // Higher priority names will be first, meaning that
5004 // a higher priority name in the path will be found
5005 // instead of a lower priority name in the program path.
5006 // E.g. <triple>-gcc on the path will be found instead
5007 // of gcc in the program path
5008 for (const auto &Path : List) {
5009 SmallString<128> P(Path);
5010 if (ScanDirForExecutable(P, TargetSpecificExecutable))
5011 return std::string(P.str());
5012 }
5013
5014 // Fall back to the path
5015 if (llvm::ErrorOr<std::string> P =
5016 llvm::sys::findProgramByName(TargetSpecificExecutable))
5017 return *P;
5018 }
5019
5020 return std::string(Name);
5021}
5022
5023std::string Driver::GetTemporaryPath(StringRef Prefix, StringRef Suffix) const {
5024 SmallString<128> Path;
5025 std::error_code EC = llvm::sys::fs::createTemporaryFile(Prefix, Suffix, Path);
5026 if (EC) {
5027 Diag(clang::diag::err_unable_to_make_temp) << EC.message();
5028 return "";
5029 }
5030
5031 return std::string(Path.str());
5032}
5033
5034std::string Driver::GetTemporaryDirectory(StringRef Prefix) const {
5035 SmallString<128> Path;
5036 std::error_code EC = llvm::sys::fs::createUniqueDirectory(Prefix, Path);
5037 if (EC) {
5038 Diag(clang::diag::err_unable_to_make_temp) << EC.message();
5039 return "";
5040 }
5041
5042 return std::string(Path.str());
5043}
5044
5045std::string Driver::GetClPchPath(Compilation &C, StringRef BaseName) const {
5046 SmallString<128> Output;
5047 if (Arg *FpArg = C.getArgs().getLastArg(options::OPT__SLASH_Fp)) {
5048 // FIXME: If anybody needs it, implement this obscure rule:
5049 // "If you specify a directory without a file name, the default file name
5050 // is VCx0.pch., where x is the major version of Visual C++ in use."
5051 Output = FpArg->getValue();
5052
5053 // "If you do not specify an extension as part of the path name, an
5054 // extension of .pch is assumed. "
5055 if (!llvm::sys::path::has_extension(Output))
5056 Output += ".pch";
5057 } else {
5058 if (Arg *YcArg = C.getArgs().getLastArg(options::OPT__SLASH_Yc))
5059 Output = YcArg->getValue();
5060 if (Output.empty())
5061 Output = BaseName;
5062 llvm::sys::path::replace_extension(Output, ".pch");
5063 }
5064 return std::string(Output.str());
5065}
5066
5067const ToolChain &Driver::getToolChain(const ArgList &Args,
5068 const llvm::Triple &Target) const {
5069
5070 auto &TC = ToolChains[Target.str()];
5071 if (!TC) {
5072 switch (Target.getOS()) {
5073 case llvm::Triple::AIX:
5074 TC = std::make_unique<toolchains::AIX>(*this, Target, Args);
5075 break;
5076 case llvm::Triple::Haiku:
5077 TC = std::make_unique<toolchains::Haiku>(*this, Target, Args);
5078 break;
5079 case llvm::Triple::Ananas:
5080 TC = std::make_unique<toolchains::Ananas>(*this, Target, Args);
5081 break;
5082 case llvm::Triple::CloudABI:
5083 TC = std::make_unique<toolchains::CloudABI>(*this, Target, Args);
5084 break;
5085 case llvm::Triple::Darwin:
5086 case llvm::Triple::MacOSX:
5087 case llvm::Triple::IOS:
5088 case llvm::Triple::TvOS:
5089 case llvm::Triple::WatchOS:
5090 TC = std::make_unique<toolchains::DarwinClang>(*this, Target, Args);
5091 break;
5092 case llvm::Triple::DragonFly:
5093 TC = std::make_unique<toolchains::DragonFly>(*this, Target, Args);
5094 break;
5095 case llvm::Triple::OpenBSD:
5096 TC = std::make_unique<toolchains::OpenBSD>(*this, Target, Args);
5097 break;
5098 case llvm::Triple::NetBSD:
5099 TC = std::make_unique<toolchains::NetBSD>(*this, Target, Args);
5100 break;
5101 case llvm::Triple::FreeBSD:
5102 TC = std::make_unique<toolchains::FreeBSD>(*this, Target, Args);
5103 break;
5104 case llvm::Triple::Minix:
5105 TC = std::make_unique<toolchains::Minix>(*this, Target, Args);
5106 break;
5107 case llvm::Triple::Linux:
5108 case llvm::Triple::ELFIAMCU:
5109 if (Target.getArch() == llvm::Triple::hexagon)
5110 TC = std::make_unique<toolchains::HexagonToolChain>(*this, Target,
5111 Args);
5112 else if ((Target.getVendor() == llvm::Triple::MipsTechnologies) &&
5113 !Target.hasEnvironment())
5114 TC = std::make_unique<toolchains::MipsLLVMToolChain>(*this, Target,
5115 Args);
5116 else if (Target.isPPC())
5117 TC = std::make_unique<toolchains::PPCLinuxToolChain>(*this, Target,
5118 Args);
5119 else if (Target.getArch() == llvm::Triple::ve)
5120 TC = std::make_unique<toolchains::VEToolChain>(*this, Target, Args);
5121
5122 else
5123 TC = std::make_unique<toolchains::Linux>(*this, Target, Args);
5124 break;
5125 case llvm::Triple::NaCl:
5126 TC = std::make_unique<toolchains::NaClToolChain>(*this, Target, Args);
5127 break;
5128 case llvm::Triple::Fuchsia:
5129 TC = std::make_unique<toolchains::Fuchsia>(*this, Target, Args);
5130 break;
5131 case llvm::Triple::Solaris:
5132 TC = std::make_unique<toolchains::Solaris>(*this, Target, Args);
5133 break;
5134 case llvm::Triple::AMDHSA:
5135 TC = std::make_unique<toolchains::ROCMToolChain>(*this, Target, Args);
5136 break;
5137 case llvm::Triple::AMDPAL:
5138 case llvm::Triple::Mesa3D:
5139 TC = std::make_unique<toolchains::AMDGPUToolChain>(*this, Target, Args);
5140 break;
5141 case llvm::Triple::Win32:
5142 switch (Target.getEnvironment()) {
5143 default:
5144 if (Target.isOSBinFormatELF())
5145 TC = std::make_unique<toolchains::Generic_ELF>(*this, Target, Args);
5146 else if (Target.isOSBinFormatMachO())
5147 TC = std::make_unique<toolchains::MachO>(*this, Target, Args);
5148 else
5149 TC = std::make_unique<toolchains::Generic_GCC>(*this, Target, Args);
5150 break;
5151 case llvm::Triple::GNU:
5152 TC = std::make_unique<toolchains::MinGW>(*this, Target, Args);
5153 break;
5154 case llvm::Triple::Itanium:
5155 TC = std::make_unique<toolchains::CrossWindowsToolChain>(*this, Target,
5156 Args);
5157 break;
5158 case llvm::Triple::MSVC:
5159 case llvm::Triple::UnknownEnvironment:
5160 if (Args.getLastArgValue(options::OPT_fuse_ld_EQ)
5161 .startswith_lower("bfd"))
5162 TC = std::make_unique<toolchains::CrossWindowsToolChain>(
5163 *this, Target, Args);
5164 else
5165 TC =
5166 std::make_unique<toolchains::MSVCToolChain>(*this, Target, Args);
5167 break;
5168 }
5169 break;
5170 case llvm::Triple::PS4:
5171 TC = std::make_unique<toolchains::PS4CPU>(*this, Target, Args);
5172 break;
5173 case llvm::Triple::Contiki:
5174 TC = std::make_unique<toolchains::Contiki>(*this, Target, Args);
5175 break;
5176 case llvm::Triple::Hurd:
5177 TC = std::make_unique<toolchains::Hurd>(*this, Target, Args);
5178 break;
5179 case llvm::Triple::ZOS:
5180 TC = std::make_unique<toolchains::ZOS>(*this, Target, Args);
5181 break;
5182 default:
5183 // Of these targets, Hexagon is the only one that might have
5184 // an OS of Linux, in which case it got handled above already.
5185 switch (Target.getArch()) {
5186 case llvm::Triple::tce:
5187 TC = std::make_unique<toolchains::TCEToolChain>(*this, Target, Args);
5188 break;
5189 case llvm::Triple::tcele:
5190 TC = std::make_unique<toolchains::TCELEToolChain>(*this, Target, Args);
5191 break;
5192 case llvm::Triple::hexagon:
5193 TC = std::make_unique<toolchains::HexagonToolChain>(*this, Target,
5194 Args);
5195 break;
5196 case llvm::Triple::lanai:
5197 TC = std::make_unique<toolchains::LanaiToolChain>(*this, Target, Args);
5198 break;
5199 case llvm::Triple::xcore:
5200 TC = std::make_unique<toolchains::XCoreToolChain>(*this, Target, Args);
5201 break;
5202 case llvm::Triple::wasm32:
5203 case llvm::Triple::wasm64:
5204 TC = std::make_unique<toolchains::WebAssembly>(*this, Target, Args);
5205 break;
5206 case llvm::Triple::avr:
5207 TC = std::make_unique<toolchains::AVRToolChain>(*this, Target, Args);
5208 break;
5209 case llvm::Triple::msp430:
5210 TC =
5211 std::make_unique<toolchains::MSP430ToolChain>(*this, Target, Args);
5212 break;
5213 case llvm::Triple::riscv32:
5214 case llvm::Triple::riscv64:
5215 if (toolchains::RISCVToolChain::hasGCCToolchain(*this, Args))
5216 TC =
5217 std::make_unique<toolchains::RISCVToolChain>(*this, Target, Args);
5218 else
5219 TC = std::make_unique<toolchains::BareMetal>(*this, Target, Args);
5220 break;
5221 case llvm::Triple::ve:
5222 TC = std::make_unique<toolchains::VEToolChain>(*this, Target, Args);
5223 break;
5224 default:
5225 if (Target.getVendor() == llvm::Triple::Myriad)
5226 TC = std::make_unique<toolchains::MyriadToolChain>(*this, Target,
5227 Args);
5228 else if (toolchains::BareMetal::handlesTarget(Target))
5229 TC = std::make_unique<toolchains::BareMetal>(*this, Target, Args);
5230 else if (Target.isOSBinFormatELF())
5231 TC = std::make_unique<toolchains::Generic_ELF>(*this, Target, Args);
5232 else if (Target.isOSBinFormatMachO())
5233 TC = std::make_unique<toolchains::MachO>(*this, Target, Args);
5234 else
5235 TC = std::make_unique<toolchains::Generic_GCC>(*this, Target, Args);
5236 }
5237 }
5238 }
5239
5240 // Intentionally omitted from the switch above: llvm::Triple::CUDA. CUDA
5241 // compiles always need two toolchains, the CUDA toolchain and the host
5242 // toolchain. So the only valid way to create a CUDA toolchain is via
5243 // CreateOffloadingDeviceToolChains.
5244
5245 return *TC;
5246}
5247
5248bool Driver::ShouldUseClangCompiler(const JobAction &JA) const {
5249 // Say "no" if there is not exactly one input of a type clang understands.
5250 if (JA.size() != 1 ||
5251 !types::isAcceptedByClang((*JA.input_begin())->getType()))
5252 return false;
5253
5254 // And say "no" if this is not a kind of action clang understands.
5255 if (!isa<PreprocessJobAction>(JA) && !isa<PrecompileJobAction>(JA) &&
5256 !isa<CompileJobAction>(JA) && !isa<BackendJobAction>(JA))
5257 return false;
5258
5259 return true;
5260}
5261
5262bool Driver::ShouldUseFlangCompiler(const JobAction &JA) const {
5263 // Say "no" if there is not exactly one input of a type flang understands.
5264 if (JA.size() != 1 ||
5265 !types::isFortran((*JA.input_begin())->getType()))
5266 return false;
5267
5268 // And say "no" if this is not a kind of action flang understands.
5269 if (!isa<PreprocessJobAction>(JA) && !isa<CompileJobAction>(JA) && !isa<BackendJobAction>(JA))
5270 return false;
5271
5272 return true;
5273}
5274
5275bool Driver::ShouldEmitStaticLibrary(const ArgList &Args) const {
5276 // Only emit static library if the flag is set explicitly.
5277 if (Args.hasArg(options::OPT_emit_static_lib))
5278 return true;
5279 return false;
5280}
5281
5282/// GetReleaseVersion - Parse (([0-9]+)(.([0-9]+)(.([0-9]+)?))?)? and return the
5283/// grouped values as integers. Numbers which are not provided are set to 0.
5284///
5285/// \return True if the entire string was parsed (9.2), or all groups were
5286/// parsed (10.3.5extrastuff).
5287bool Driver::GetReleaseVersion(StringRef Str, unsigned &Major, unsigned &Minor,
5288 unsigned &Micro, bool &HadExtra) {
5289 HadExtra = false;
5290
5291 Major = Minor = Micro = 0;
5292 if (Str.empty())
5293 return false;
5294
5295 if (Str.consumeInteger(10, Major))
5296 return false;
5297 if (Str.empty())
5298 return true;
5299 if (Str[0] != '.')
5300 return false;
5301
5302 Str = Str.drop_front(1);
5303
5304 if (Str.consumeInteger(10, Minor))
5305 return false;
5306 if (Str.empty())
5307 return true;
5308 if (Str[0] != '.')
5309 return false;
5310 Str = Str.drop_front(1);
5311
5312 if (Str.consumeInteger(10, Micro))
5313 return false;
5314 if (!Str.empty())
5315 HadExtra = true;
5316 return true;
5317}
5318
5319/// Parse digits from a string \p Str and fulfill \p Digits with
5320/// the parsed numbers. This method assumes that the max number of
5321/// digits to look for is equal to Digits.size().
5322///
5323/// \return True if the entire string was parsed and there are
5324/// no extra characters remaining at the end.
5325bool Driver::GetReleaseVersion(StringRef Str,
5326 MutableArrayRef<unsigned> Digits) {
5327 if (Str.empty())
5328 return false;
5329
5330 unsigned CurDigit = 0;
5331 while (CurDigit < Digits.size()) {
5332 unsigned Digit;
5333 if (Str.consumeInteger(10, Digit))
5334 return false;
5335 Digits[CurDigit] = Digit;
5336 if (Str.empty())
5337 return true;
5338 if (Str[0] != '.')
5339 return false;
5340 Str = Str.drop_front(1);
5341 CurDigit++;
5342 }
5343
5344 // More digits than requested, bail out...
5345 return false;
5346}
5347
5348std::pair<unsigned, unsigned>
5349Driver::getIncludeExcludeOptionFlagMasks(bool IsClCompatMode) const {
5350 unsigned IncludedFlagsBitmask = 0;
5351 unsigned ExcludedFlagsBitmask = options::NoDriverOption;
5352
5353 if (IsClCompatMode) {
5354 // Include CL and Core options.
5355 IncludedFlagsBitmask |= options::CLOption;
5356 IncludedFlagsBitmask |= options::CoreOption;
5357 } else {
5358 ExcludedFlagsBitmask |= options::CLOption;
5359 }
5360
5361 return std::make_pair(IncludedFlagsBitmask, ExcludedFlagsBitmask);
5362}
5363
5364bool clang::driver::isOptimizationLevelFast(const ArgList &Args) {
5365 return Args.hasFlag(options::OPT_Ofast, options::OPT_O_Group, false);
5366}
5367
5368bool clang::driver::willEmitRemarks(const ArgList &Args) {
5369 // -fsave-optimization-record enables it.
5370 if (Args.hasFlag(options::OPT_fsave_optimization_record,
5371 options::OPT_fno_save_optimization_record, false))
5372 return true;
5373
5374 // -fsave-optimization-record=<format> enables it as well.
5375 if (Args.hasFlag(options::OPT_fsave_optimization_record_EQ,
5376 options::OPT_fno_save_optimization_record, false))
5377 return true;
5378
5379 // -foptimization-record-file alone enables it too.
5380 if (Args.hasFlag(options::OPT_foptimization_record_file_EQ,
5381 options::OPT_fno_save_optimization_record, false))
5382 return true;
5383
5384 // -foptimization-record-passes alone enables it too.
5385 if (Args.hasFlag(options::OPT_foptimization_record_passes_EQ,
5386 options::OPT_fno_save_optimization_record, false))
5387 return true;
5388 return false;
5389}

/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/include/llvm/ADT/SmallVector.h

1//===- llvm/ADT/SmallVector.h - 'Normally small' vectors --------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file defines the SmallVector class.
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef LLVM_ADT_SMALLVECTOR_H
14#define LLVM_ADT_SMALLVECTOR_H
15
16#include "llvm/ADT/iterator_range.h"
17#include "llvm/Support/Compiler.h"
18#include "llvm/Support/ErrorHandling.h"
19#include "llvm/Support/MathExtras.h"
20#include "llvm/Support/MemAlloc.h"
21#include "llvm/Support/type_traits.h"
22#include <algorithm>
23#include <cassert>
24#include <cstddef>
25#include <cstdlib>
26#include <cstring>
27#include <initializer_list>
28#include <iterator>
29#include <limits>
30#include <memory>
31#include <new>
32#include <type_traits>
33#include <utility>
34
35namespace llvm {
36
37/// This is all the stuff common to all SmallVectors.
38///
39/// The template parameter specifies the type which should be used to hold the
40/// Size and Capacity of the SmallVector, so it can be adjusted.
41/// Using 32 bit size is desirable to shrink the size of the SmallVector.
42/// Using 64 bit size is desirable for cases like SmallVector<char>, where a
43/// 32 bit size would limit the vector to ~4GB. SmallVectors are used for
44/// buffering bitcode output - which can exceed 4GB.
45template <class Size_T> class SmallVectorBase {
46protected:
47 void *BeginX;
48 Size_T Size = 0, Capacity;
49
50 /// The maximum value of the Size_T used.
51 static constexpr size_t SizeTypeMax() {
52 return std::numeric_limits<Size_T>::max();
53 }
54
55 SmallVectorBase() = delete;
56 SmallVectorBase(void *FirstEl, size_t TotalCapacity)
57 : BeginX(FirstEl), Capacity(TotalCapacity) {}
58
59 /// This is a helper for \a grow() that's out of line to reduce code
60 /// duplication. This function will report a fatal error if it can't grow at
61 /// least to \p MinSize.
62 void *mallocForGrow(size_t MinSize, size_t TSize, size_t &NewCapacity);
63
64 /// This is an implementation of the grow() method which only works
65 /// on POD-like data types and is out of line to reduce code duplication.
66 /// This function will report a fatal error if it cannot increase capacity.
67 void grow_pod(void *FirstEl, size_t MinSize, size_t TSize);
68
69public:
70 size_t size() const { return Size; }
71 size_t capacity() const { return Capacity; }
72
73 LLVM_NODISCARD[[clang::warn_unused_result]] bool empty() const { return !Size; }
15
Assuming field 'Size' is not equal to 0, which participates in a condition later
16
Returning zero, which participates in a condition later
74
75 /// Set the array size to \p N, which the current array must have enough
76 /// capacity for.
77 ///
78 /// This does not construct or destroy any elements in the vector.
79 ///
80 /// Clients can use this in conjunction with capacity() to write past the end
81 /// of the buffer when they know that more elements are available, and only
82 /// update the size later. This avoids the cost of value initializing elements
83 /// which will only be overwritten.
84 void set_size(size_t N) {
85 assert(N <= capacity())((N <= capacity()) ? static_cast<void> (0) : __assert_fail
("N <= capacity()", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/include/llvm/ADT/SmallVector.h"
, 85, __PRETTY_FUNCTION__))
;
86 Size = N;
87 }
88};
89
90template <class T>
91using SmallVectorSizeType =
92 typename std::conditional<sizeof(T) < 4 && sizeof(void *) >= 8, uint64_t,
93 uint32_t>::type;
94
95/// Figure out the offset of the first element.
96template <class T, typename = void> struct SmallVectorAlignmentAndSize {
97 alignas(SmallVectorBase<SmallVectorSizeType<T>>) char Base[sizeof(
98 SmallVectorBase<SmallVectorSizeType<T>>)];
99 alignas(T) char FirstEl[sizeof(T)];
100};
101
102/// This is the part of SmallVectorTemplateBase which does not depend on whether
103/// the type T is a POD. The extra dummy template argument is used by ArrayRef
104/// to avoid unnecessarily requiring T to be complete.
105template <typename T, typename = void>
106class SmallVectorTemplateCommon
107 : public SmallVectorBase<SmallVectorSizeType<T>> {
108 using Base = SmallVectorBase<SmallVectorSizeType<T>>;
109
110 /// Find the address of the first element. For this pointer math to be valid
111 /// with small-size of 0 for T with lots of alignment, it's important that
112 /// SmallVectorStorage is properly-aligned even for small-size of 0.
113 void *getFirstEl() const {
114 return const_cast<void *>(reinterpret_cast<const void *>(
115 reinterpret_cast<const char *>(this) +
116 offsetof(SmallVectorAlignmentAndSize<T>, FirstEl)__builtin_offsetof(SmallVectorAlignmentAndSize<T>, FirstEl
)
));
117 }
118 // Space after 'FirstEl' is clobbered, do not add any instance vars after it.
119
120protected:
121 SmallVectorTemplateCommon(size_t Size) : Base(getFirstEl(), Size) {}
122
123 void grow_pod(size_t MinSize, size_t TSize) {
124 Base::grow_pod(getFirstEl(), MinSize, TSize);
125 }
126
127 /// Return true if this is a smallvector which has not had dynamic
128 /// memory allocated for it.
129 bool isSmall() const { return this->BeginX == getFirstEl(); }
130
131 /// Put this vector in a state of being small.
132 void resetToSmall() {
133 this->BeginX = getFirstEl();
134 this->Size = this->Capacity = 0; // FIXME: Setting Capacity to 0 is suspect.
135 }
136
137 /// Return true if V is an internal reference to the given range.
138 bool isReferenceToRange(const void *V, const void *First, const void *Last) const {
139 // Use std::less to avoid UB.
140 std::less<> LessThan;
141 return !LessThan(V, First) && LessThan(V, Last);
142 }
143
144 /// Return true if V is an internal reference to this vector.
145 bool isReferenceToStorage(const void *V) const {
146 return isReferenceToRange(V, this->begin(), this->end());
147 }
148
149 /// Return true if First and Last form a valid (possibly empty) range in this
150 /// vector's storage.
151 bool isRangeInStorage(const void *First, const void *Last) const {
152 // Use std::less to avoid UB.
153 std::less<> LessThan;
154 return !LessThan(First, this->begin()) && !LessThan(Last, First) &&
155 !LessThan(this->end(), Last);
156 }
157
158 /// Return true unless Elt will be invalidated by resizing the vector to
159 /// NewSize.
160 bool isSafeToReferenceAfterResize(const void *Elt, size_t NewSize) {
161 // Past the end.
162 if (LLVM_LIKELY(!isReferenceToStorage(Elt))__builtin_expect((bool)(!isReferenceToStorage(Elt)), true))
163 return true;
164
165 // Return false if Elt will be destroyed by shrinking.
166 if (NewSize <= this->size())
167 return Elt < this->begin() + NewSize;
168
169 // Return false if we need to grow.
170 return NewSize <= this->capacity();
171 }
172
173 /// Check whether Elt will be invalidated by resizing the vector to NewSize.
174 void assertSafeToReferenceAfterResize(const void *Elt, size_t NewSize) {
175 assert(isSafeToReferenceAfterResize(Elt, NewSize) &&((isSafeToReferenceAfterResize(Elt, NewSize) && "Attempting to reference an element of the vector in an operation "
"that invalidates it") ? static_cast<void> (0) : __assert_fail
("isSafeToReferenceAfterResize(Elt, NewSize) && \"Attempting to reference an element of the vector in an operation \" \"that invalidates it\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/include/llvm/ADT/SmallVector.h"
, 177, __PRETTY_FUNCTION__))
176 "Attempting to reference an element of the vector in an operation "((isSafeToReferenceAfterResize(Elt, NewSize) && "Attempting to reference an element of the vector in an operation "
"that invalidates it") ? static_cast<void> (0) : __assert_fail
("isSafeToReferenceAfterResize(Elt, NewSize) && \"Attempting to reference an element of the vector in an operation \" \"that invalidates it\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/include/llvm/ADT/SmallVector.h"
, 177, __PRETTY_FUNCTION__))
177 "that invalidates it")((isSafeToReferenceAfterResize(Elt, NewSize) && "Attempting to reference an element of the vector in an operation "
"that invalidates it") ? static_cast<void> (0) : __assert_fail
("isSafeToReferenceAfterResize(Elt, NewSize) && \"Attempting to reference an element of the vector in an operation \" \"that invalidates it\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/include/llvm/ADT/SmallVector.h"
, 177, __PRETTY_FUNCTION__))
;
178 }
179
180 /// Check whether Elt will be invalidated by increasing the size of the
181 /// vector by N.
182 void assertSafeToAdd(const void *Elt, size_t N = 1) {
183 this->assertSafeToReferenceAfterResize(Elt, this->size() + N);
184 }
185
186 /// Check whether any part of the range will be invalidated by clearing.
187 void assertSafeToReferenceAfterClear(const T *From, const T *To) {
188 if (From == To)
189 return;
190 this->assertSafeToReferenceAfterResize(From, 0);
191 this->assertSafeToReferenceAfterResize(To - 1, 0);
192 }
193 template <
194 class ItTy,
195 std::enable_if_t<!std::is_same<std::remove_const_t<ItTy>, T *>::value,
196 bool> = false>
197 void assertSafeToReferenceAfterClear(ItTy, ItTy) {}
198
199 /// Check whether any part of the range will be invalidated by growing.
200 void assertSafeToAddRange(const T *From, const T *To) {
201 if (From == To)
202 return;
203 this->assertSafeToAdd(From, To - From);
204 this->assertSafeToAdd(To - 1, To - From);
205 }
206 template <
207 class ItTy,
208 std::enable_if_t<!std::is_same<std::remove_const_t<ItTy>, T *>::value,
209 bool> = false>
210 void assertSafeToAddRange(ItTy, ItTy) {}
211
212 /// Reserve enough space to add one element, and return the updated element
213 /// pointer in case it was a reference to the storage.
214 template <class U>
215 static const T *reserveForParamAndGetAddressImpl(U *This, const T &Elt,
216 size_t N) {
217 size_t NewSize = This->size() + N;
218 if (LLVM_LIKELY(NewSize <= This->capacity())__builtin_expect((bool)(NewSize <= This->capacity()), true
)
)
219 return &Elt;
220
221 bool ReferencesStorage = false;
222 int64_t Index = -1;
223 if (!U::TakesParamByValue) {
224 if (LLVM_UNLIKELY(This->isReferenceToStorage(&Elt))__builtin_expect((bool)(This->isReferenceToStorage(&Elt
)), false)
) {
225 ReferencesStorage = true;
226 Index = &Elt - This->begin();
227 }
228 }
229 This->grow(NewSize);
230 return ReferencesStorage ? This->begin() + Index : &Elt;
231 }
232
233public:
234 using size_type = size_t;
235 using difference_type = ptrdiff_t;
236 using value_type = T;
237 using iterator = T *;
238 using const_iterator = const T *;
239
240 using const_reverse_iterator = std::reverse_iterator<const_iterator>;
241 using reverse_iterator = std::reverse_iterator<iterator>;
242
243 using reference = T &;
244 using const_reference = const T &;
245 using pointer = T *;
246 using const_pointer = const T *;
247
248 using Base::capacity;
249 using Base::empty;
250 using Base::size;
251
252 // forward iterator creation methods.
253 iterator begin() { return (iterator)this->BeginX; }
254 const_iterator begin() const { return (const_iterator)this->BeginX; }
255 iterator end() { return begin() + size(); }
256 const_iterator end() const { return begin() + size(); }
257
258 // reverse iterator creation methods.
259 reverse_iterator rbegin() { return reverse_iterator(end()); }
260 const_reverse_iterator rbegin() const{ return const_reverse_iterator(end()); }
261 reverse_iterator rend() { return reverse_iterator(begin()); }
262 const_reverse_iterator rend() const { return const_reverse_iterator(begin());}
263
264 size_type size_in_bytes() const { return size() * sizeof(T); }
265 size_type max_size() const {
266 return std::min(this->SizeTypeMax(), size_type(-1) / sizeof(T));
267 }
268
269 size_t capacity_in_bytes() const { return capacity() * sizeof(T); }
270
271 /// Return a pointer to the vector's buffer, even if empty().
272 pointer data() { return pointer(begin()); }
273 /// Return a pointer to the vector's buffer, even if empty().
274 const_pointer data() const { return const_pointer(begin()); }
275
276 reference operator[](size_type idx) {
277 assert(idx < size())((idx < size()) ? static_cast<void> (0) : __assert_fail
("idx < size()", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/include/llvm/ADT/SmallVector.h"
, 277, __PRETTY_FUNCTION__))
;
278 return begin()[idx];
279 }
280 const_reference operator[](size_type idx) const {
281 assert(idx < size())((idx < size()) ? static_cast<void> (0) : __assert_fail
("idx < size()", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/include/llvm/ADT/SmallVector.h"
, 281, __PRETTY_FUNCTION__))
;
282 return begin()[idx];
283 }
284
285 reference front() {
286 assert(!empty())((!empty()) ? static_cast<void> (0) : __assert_fail ("!empty()"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/include/llvm/ADT/SmallVector.h"
, 286, __PRETTY_FUNCTION__))
;
287 return begin()[0];
288 }
289 const_reference front() const {
290 assert(!empty())((!empty()) ? static_cast<void> (0) : __assert_fail ("!empty()"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/include/llvm/ADT/SmallVector.h"
, 290, __PRETTY_FUNCTION__))
;
291 return begin()[0];
292 }
293
294 reference back() {
295 assert(!empty())((!empty()) ? static_cast<void> (0) : __assert_fail ("!empty()"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/include/llvm/ADT/SmallVector.h"
, 295, __PRETTY_FUNCTION__))
;
296 return end()[-1];
297 }
298 const_reference back() const {
299 assert(!empty())((!empty()) ? static_cast<void> (0) : __assert_fail ("!empty()"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/include/llvm/ADT/SmallVector.h"
, 299, __PRETTY_FUNCTION__))
;
300 return end()[-1];
301 }
302};
303
304/// SmallVectorTemplateBase<TriviallyCopyable = false> - This is where we put
305/// method implementations that are designed to work with non-trivial T's.
306///
307/// We approximate is_trivially_copyable with trivial move/copy construction and
308/// trivial destruction. While the standard doesn't specify that you're allowed
309/// copy these types with memcpy, there is no way for the type to observe this.
310/// This catches the important case of std::pair<POD, POD>, which is not
311/// trivially assignable.
312template <typename T, bool = (is_trivially_copy_constructible<T>::value) &&
313 (is_trivially_move_constructible<T>::value) &&
314 std::is_trivially_destructible<T>::value>
315class SmallVectorTemplateBase : public SmallVectorTemplateCommon<T> {
316 friend class SmallVectorTemplateCommon<T>;
317
318protected:
319 static constexpr bool TakesParamByValue = false;
320 using ValueParamT = const T &;
321
322 SmallVectorTemplateBase(size_t Size) : SmallVectorTemplateCommon<T>(Size) {}
323
324 static void destroy_range(T *S, T *E) {
325 while (S != E) {
326 --E;
327 E->~T();
328 }
329 }
330
331 /// Move the range [I, E) into the uninitialized memory starting with "Dest",
332 /// constructing elements as needed.
333 template<typename It1, typename It2>
334 static void uninitialized_move(It1 I, It1 E, It2 Dest) {
335 std::uninitialized_copy(std::make_move_iterator(I),
336 std::make_move_iterator(E), Dest);
337 }
338
339 /// Copy the range [I, E) onto the uninitialized memory starting with "Dest",
340 /// constructing elements as needed.
341 template<typename It1, typename It2>
342 static void uninitialized_copy(It1 I, It1 E, It2 Dest) {
343 std::uninitialized_copy(I, E, Dest);
344 }
345
346 /// Grow the allocated memory (without initializing new elements), doubling
347 /// the size of the allocated memory. Guarantees space for at least one more
348 /// element, or MinSize more elements if specified.
349 void grow(size_t MinSize = 0);
350
351 /// Create a new allocation big enough for \p MinSize and pass back its size
352 /// in \p NewCapacity. This is the first section of \a grow().
353 T *mallocForGrow(size_t MinSize, size_t &NewCapacity) {
354 return static_cast<T *>(
355 SmallVectorBase<SmallVectorSizeType<T>>::mallocForGrow(
356 MinSize, sizeof(T), NewCapacity));
357 }
358
359 /// Move existing elements over to the new allocation \p NewElts, the middle
360 /// section of \a grow().
361 void moveElementsForGrow(T *NewElts);
362
363 /// Transfer ownership of the allocation, finishing up \a grow().
364 void takeAllocationForGrow(T *NewElts, size_t NewCapacity);
365
366 /// Reserve enough space to add one element, and return the updated element
367 /// pointer in case it was a reference to the storage.
368 const T *reserveForParamAndGetAddress(const T &Elt, size_t N = 1) {
369 return this->reserveForParamAndGetAddressImpl(this, Elt, N);
370 }
371
372 /// Reserve enough space to add one element, and return the updated element
373 /// pointer in case it was a reference to the storage.
374 T *reserveForParamAndGetAddress(T &Elt, size_t N = 1) {
375 return const_cast<T *>(
376 this->reserveForParamAndGetAddressImpl(this, Elt, N));
377 }
378
379 static T &&forward_value_param(T &&V) { return std::move(V); }
380 static const T &forward_value_param(const T &V) { return V; }
381
382 void growAndAssign(size_t NumElts, const T &Elt) {
383 // Grow manually in case Elt is an internal reference.
384 size_t NewCapacity;
385 T *NewElts = mallocForGrow(NumElts, NewCapacity);
386 std::uninitialized_fill_n(NewElts, NumElts, Elt);
387 this->destroy_range(this->begin(), this->end());
388 takeAllocationForGrow(NewElts, NewCapacity);
389 this->set_size(NumElts);
390 }
391
392 template <typename... ArgTypes> T &growAndEmplaceBack(ArgTypes &&... Args) {
393 // Grow manually in case one of Args is an internal reference.
394 size_t NewCapacity;
395 T *NewElts = mallocForGrow(0, NewCapacity);
396 ::new ((void *)(NewElts + this->size())) T(std::forward<ArgTypes>(Args)...);
397 moveElementsForGrow(NewElts);
398 takeAllocationForGrow(NewElts, NewCapacity);
399 this->set_size(this->size() + 1);
400 return this->back();
401 }
402
403public:
404 void push_back(const T &Elt) {
405 const T *EltPtr = reserveForParamAndGetAddress(Elt);
406 ::new ((void *)this->end()) T(*EltPtr);
407 this->set_size(this->size() + 1);
408 }
409
410 void push_back(T &&Elt) {
411 T *EltPtr = reserveForParamAndGetAddress(Elt);
412 ::new ((void *)this->end()) T(::std::move(*EltPtr));
413 this->set_size(this->size() + 1);
414 }
415
416 void pop_back() {
417 this->set_size(this->size() - 1);
418 this->end()->~T();
419 }
420};
421
422// Define this out-of-line to dissuade the C++ compiler from inlining it.
423template <typename T, bool TriviallyCopyable>
424void SmallVectorTemplateBase<T, TriviallyCopyable>::grow(size_t MinSize) {
425 size_t NewCapacity;
426 T *NewElts = mallocForGrow(MinSize, NewCapacity);
427 moveElementsForGrow(NewElts);
428 takeAllocationForGrow(NewElts, NewCapacity);
429}
430
431// Define this out-of-line to dissuade the C++ compiler from inlining it.
432template <typename T, bool TriviallyCopyable>
433void SmallVectorTemplateBase<T, TriviallyCopyable>::moveElementsForGrow(
434 T *NewElts) {
435 // Move the elements over.
436 this->uninitialized_move(this->begin(), this->end(), NewElts);
437
438 // Destroy the original elements.
439 destroy_range(this->begin(), this->end());
440}
441
442// Define this out-of-line to dissuade the C++ compiler from inlining it.
443template <typename T, bool TriviallyCopyable>
444void SmallVectorTemplateBase<T, TriviallyCopyable>::takeAllocationForGrow(
445 T *NewElts, size_t NewCapacity) {
446 // If this wasn't grown from the inline copy, deallocate the old space.
447 if (!this->isSmall())
448 free(this->begin());
449
450 this->BeginX = NewElts;
451 this->Capacity = NewCapacity;
452}
453
454/// SmallVectorTemplateBase<TriviallyCopyable = true> - This is where we put
455/// method implementations that are designed to work with trivially copyable
456/// T's. This allows using memcpy in place of copy/move construction and
457/// skipping destruction.
458template <typename T>
459class SmallVectorTemplateBase<T, true> : public SmallVectorTemplateCommon<T> {
460 friend class SmallVectorTemplateCommon<T>;
461
462protected:
463 /// True if it's cheap enough to take parameters by value. Doing so avoids
464 /// overhead related to mitigations for reference invalidation.
465 static constexpr bool TakesParamByValue = sizeof(T) <= 2 * sizeof(void *);
466
467 /// Either const T& or T, depending on whether it's cheap enough to take
468 /// parameters by value.
469 using ValueParamT =
470 typename std::conditional<TakesParamByValue, T, const T &>::type;
471
472 SmallVectorTemplateBase(size_t Size) : SmallVectorTemplateCommon<T>(Size) {}
473
474 // No need to do a destroy loop for POD's.
475 static void destroy_range(T *, T *) {}
476
477 /// Move the range [I, E) onto the uninitialized memory
478 /// starting with "Dest", constructing elements into it as needed.
479 template<typename It1, typename It2>
480 static void uninitialized_move(It1 I, It1 E, It2 Dest) {
481 // Just do a copy.
482 uninitialized_copy(I, E, Dest);
483 }
484
485 /// Copy the range [I, E) onto the uninitialized memory
486 /// starting with "Dest", constructing elements into it as needed.
487 template<typename It1, typename It2>
488 static void uninitialized_copy(It1 I, It1 E, It2 Dest) {
489 // Arbitrary iterator types; just use the basic implementation.
490 std::uninitialized_copy(I, E, Dest);
491 }
492
493 /// Copy the range [I, E) onto the uninitialized memory
494 /// starting with "Dest", constructing elements into it as needed.
495 template <typename T1, typename T2>
496 static void uninitialized_copy(
497 T1 *I, T1 *E, T2 *Dest,
498 std::enable_if_t<std::is_same<typename std::remove_const<T1>::type,
499 T2>::value> * = nullptr) {
500 // Use memcpy for PODs iterated by pointers (which includes SmallVector
501 // iterators): std::uninitialized_copy optimizes to memmove, but we can
502 // use memcpy here. Note that I and E are iterators and thus might be
503 // invalid for memcpy if they are equal.
504 if (I != E)
505 memcpy(reinterpret_cast<void *>(Dest), I, (E - I) * sizeof(T));
506 }
507
508 /// Double the size of the allocated memory, guaranteeing space for at
509 /// least one more element or MinSize if specified.
510 void grow(size_t MinSize = 0) { this->grow_pod(MinSize, sizeof(T)); }
511
512 /// Reserve enough space to add one element, and return the updated element
513 /// pointer in case it was a reference to the storage.
514 const T *reserveForParamAndGetAddress(const T &Elt, size_t N = 1) {
515 return this->reserveForParamAndGetAddressImpl(this, Elt, N);
516 }
517
518 /// Reserve enough space to add one element, and return the updated element
519 /// pointer in case it was a reference to the storage.
520 T *reserveForParamAndGetAddress(T &Elt, size_t N = 1) {
521 return const_cast<T *>(
522 this->reserveForParamAndGetAddressImpl(this, Elt, N));
523 }
524
525 /// Copy \p V or return a reference, depending on \a ValueParamT.
526 static ValueParamT forward_value_param(ValueParamT V) { return V; }
527
528 void growAndAssign(size_t NumElts, T Elt) {
529 // Elt has been copied in case it's an internal