1 | //===-- MSVC.cpp - MSVC ToolChain Implementations -------------------------===// |
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 "MSVC.h" |
10 | #include "Darwin.h" |
11 | #include "clang/Config/config.h" |
12 | #include "clang/Driver/CommonArgs.h" |
13 | #include "clang/Driver/Compilation.h" |
14 | #include "clang/Driver/Driver.h" |
15 | #include "clang/Driver/Options.h" |
16 | #include "clang/Driver/SanitizerArgs.h" |
17 | #include "llvm/Option/Arg.h" |
18 | #include "llvm/Option/ArgList.h" |
19 | #include "llvm/Support/ConvertUTF.h" |
20 | #include "llvm/Support/ErrorHandling.h" |
21 | #include "llvm/Support/FileSystem.h" |
22 | #include "llvm/Support/Path.h" |
23 | #include "llvm/Support/Process.h" |
24 | #include "llvm/Support/VirtualFileSystem.h" |
25 | #include "llvm/TargetParser/Host.h" |
26 | #include <cstdio> |
27 | |
28 | #ifdef _WIN32 |
29 | #define WIN32_LEAN_AND_MEAN |
30 | #define NOGDI |
31 | #ifndef NOMINMAX |
32 | #define NOMINMAX |
33 | #endif |
34 | #include <windows.h> |
35 | #endif |
36 | |
37 | using namespace clang::driver; |
38 | using namespace clang::driver::toolchains; |
39 | using namespace clang::driver::tools; |
40 | using namespace clang; |
41 | using namespace llvm::opt; |
42 | |
43 | static bool canExecute(llvm::vfs::FileSystem &VFS, StringRef Path) { |
44 | auto Status = VFS.status(Path); |
45 | if (!Status) |
46 | return false; |
47 | return (Status->getPermissions() & llvm::sys::fs::perms::all_exe) != 0; |
48 | } |
49 | |
50 | // Try to find Exe from a Visual Studio distribution. This first tries to find |
51 | // an installed copy of Visual Studio and, failing that, looks in the PATH, |
52 | // making sure that whatever executable that's found is not a same-named exe |
53 | // from clang itself to prevent clang from falling back to itself. |
54 | static std::string FindVisualStudioExecutable(const ToolChain &TC, |
55 | const char *Exe) { |
56 | const auto &MSVC = static_cast<const toolchains::MSVCToolChain &>(TC); |
57 | SmallString<128> FilePath( |
58 | MSVC.getSubDirectoryPath(Type: llvm::SubDirectoryType::Bin)); |
59 | llvm::sys::path::append(path&: FilePath, a: Exe); |
60 | return std::string(canExecute(VFS&: TC.getVFS(), Path: FilePath) ? FilePath.str() : Exe); |
61 | } |
62 | |
63 | void visualstudio::Linker::ConstructJob(Compilation &C, const JobAction &JA, |
64 | const InputInfo &Output, |
65 | const InputInfoList &Inputs, |
66 | const ArgList &Args, |
67 | const char *LinkingOutput) const { |
68 | ArgStringList CmdArgs; |
69 | |
70 | auto &TC = static_cast<const toolchains::MSVCToolChain &>(getToolChain()); |
71 | |
72 | assert((Output.isFilename() || Output.isNothing()) && "invalid output" ); |
73 | if (Output.isFilename()) |
74 | CmdArgs.push_back( |
75 | Elt: Args.MakeArgString(Str: std::string("-out:" ) + Output.getFilename())); |
76 | |
77 | if (Args.hasArg(Ids: options::OPT_marm64x)) |
78 | CmdArgs.push_back(Elt: "-machine:arm64x" ); |
79 | else if (TC.getTriple().isWindowsArm64EC()) |
80 | CmdArgs.push_back(Elt: "-machine:arm64ec" ); |
81 | |
82 | if (const Arg *A = Args.getLastArg(Ids: options::OPT_fveclib)) { |
83 | StringRef V = A->getValue(); |
84 | if (V == "ArmPL" ) |
85 | CmdArgs.push_back(Elt: Args.MakeArgString(Str: "--dependent-lib=amath" )); |
86 | } |
87 | |
88 | if (!Args.hasArg(Ids: options::OPT_nostdlib, Ids: options::OPT_nostartfiles) && |
89 | !C.getDriver().IsCLMode() && !C.getDriver().IsFlangMode()) { |
90 | CmdArgs.push_back(Elt: "-defaultlib:libcmt" ); |
91 | CmdArgs.push_back(Elt: "-defaultlib:oldnames" ); |
92 | } |
93 | |
94 | // If the VC environment hasn't been configured (perhaps because the user |
95 | // did not run vcvarsall), try to build a consistent link environment. If |
96 | // the environment variable is set however, assume the user knows what |
97 | // they're doing. If the user passes /vctoolsdir or /winsdkdir, trust that |
98 | // over env vars. |
99 | if (const Arg *A = Args.getLastArg(Ids: options::OPT__SLASH_diasdkdir, |
100 | Ids: options::OPT__SLASH_winsysroot)) { |
101 | // cl.exe doesn't find the DIA SDK automatically, so this too requires |
102 | // explicit flags and doesn't automatically look in "DIA SDK" relative |
103 | // to the path we found for VCToolChainPath. |
104 | llvm::SmallString<128> DIAPath(A->getValue()); |
105 | if (A->getOption().getID() == options::OPT__SLASH_winsysroot) |
106 | llvm::sys::path::append(path&: DIAPath, a: "DIA SDK" ); |
107 | |
108 | // The DIA SDK always uses the legacy vc arch, even in new MSVC versions. |
109 | llvm::sys::path::append(path&: DIAPath, a: "lib" , |
110 | b: llvm::archToLegacyVCArch(Arch: TC.getArch())); |
111 | CmdArgs.push_back(Elt: Args.MakeArgString(Str: Twine("-libpath:" ) + DIAPath)); |
112 | } |
113 | if (!llvm::sys::Process::GetEnv(name: "LIB" ) || |
114 | Args.hasArg(Ids: options::OPT__SLASH_vctoolsdir, |
115 | Ids: options::OPT__SLASH_vctoolsversion, |
116 | Ids: options::OPT__SLASH_winsysroot)) { |
117 | CmdArgs.push_back(Elt: Args.MakeArgString( |
118 | Str: Twine("-libpath:" ) + |
119 | TC.getSubDirectoryPath(Type: llvm::SubDirectoryType::Lib))); |
120 | CmdArgs.push_back(Elt: Args.MakeArgString( |
121 | Str: Twine("-libpath:" ) + |
122 | TC.getSubDirectoryPath(Type: llvm::SubDirectoryType::Lib, SubdirParent: "atlmfc" ))); |
123 | } |
124 | if (!llvm::sys::Process::GetEnv(name: "LIB" ) || |
125 | Args.hasArg(Ids: options::OPT__SLASH_winsdkdir, |
126 | Ids: options::OPT__SLASH_winsdkversion, |
127 | Ids: options::OPT__SLASH_winsysroot)) { |
128 | if (TC.useUniversalCRT()) { |
129 | std::string UniversalCRTLibPath; |
130 | if (TC.getUniversalCRTLibraryPath(Args, path&: UniversalCRTLibPath)) |
131 | CmdArgs.push_back( |
132 | Elt: Args.MakeArgString(Str: Twine("-libpath:" ) + UniversalCRTLibPath)); |
133 | } |
134 | std::string WindowsSdkLibPath; |
135 | if (TC.getWindowsSDKLibraryPath(Args, path&: WindowsSdkLibPath)) |
136 | CmdArgs.push_back( |
137 | Elt: Args.MakeArgString(Str: std::string("-libpath:" ) + WindowsSdkLibPath)); |
138 | } |
139 | |
140 | if (!C.getDriver().IsCLMode() && Args.hasArg(Ids: options::OPT_L)) |
141 | for (const auto &LibPath : Args.getAllArgValues(Id: options::OPT_L)) |
142 | CmdArgs.push_back(Elt: Args.MakeArgString(Str: "-libpath:" + LibPath)); |
143 | |
144 | if (C.getDriver().IsFlangMode() && |
145 | !Args.hasArg(Ids: options::OPT_nostdlib, Ids: options::OPT_nodefaultlibs)) { |
146 | TC.addFortranRuntimeLibraryPath(Args, CmdArgs); |
147 | TC.addFortranRuntimeLibs(Args, CmdArgs); |
148 | |
149 | // Inform the MSVC linker that we're generating a console application, i.e. |
150 | // one with `main` as the "user-defined" entry point. The `main` function is |
151 | // defined in flang's runtime libraries. |
152 | CmdArgs.push_back(Elt: "/subsystem:console" ); |
153 | } |
154 | |
155 | // Add the compiler-rt library directories to libpath if they exist to help |
156 | // the linker find the various sanitizer, builtin, and profiling runtimes. |
157 | for (const auto &LibPath : TC.getLibraryPaths()) { |
158 | if (TC.getVFS().exists(Path: LibPath)) |
159 | CmdArgs.push_back(Elt: Args.MakeArgString(Str: "-libpath:" + LibPath)); |
160 | } |
161 | auto CRTPath = TC.getCompilerRTPath(); |
162 | if (TC.getVFS().exists(Path: CRTPath)) |
163 | CmdArgs.push_back(Elt: Args.MakeArgString(Str: "-libpath:" + CRTPath)); |
164 | |
165 | CmdArgs.push_back(Elt: "-nologo" ); |
166 | |
167 | if (Args.hasArg(Ids: options::OPT_g_Group, Ids: options::OPT__SLASH_Z7)) |
168 | CmdArgs.push_back(Elt: "-debug" ); |
169 | |
170 | // If we specify /hotpatch, let the linker add padding in front of each |
171 | // function, like MSVC does. |
172 | if (Args.hasArg(Ids: options::OPT_fms_hotpatch, Ids: options::OPT__SLASH_hotpatch)) |
173 | CmdArgs.push_back(Elt: "-functionpadmin" ); |
174 | |
175 | // Pass on /Brepro if it was passed to the compiler. |
176 | // Note that /Brepro maps to -mno-incremental-linker-compatible. |
177 | bool DefaultIncrementalLinkerCompatible = |
178 | C.getDefaultToolChain().getTriple().isWindowsMSVCEnvironment(); |
179 | if (!Args.hasFlag(Pos: options::OPT_mincremental_linker_compatible, |
180 | Neg: options::OPT_mno_incremental_linker_compatible, |
181 | Default: DefaultIncrementalLinkerCompatible)) |
182 | CmdArgs.push_back(Elt: "-Brepro" ); |
183 | |
184 | bool DLL = Args.hasArg(Ids: options::OPT__SLASH_LD, Ids: options::OPT__SLASH_LDd, |
185 | Ids: options::OPT_shared); |
186 | if (DLL) { |
187 | CmdArgs.push_back(Elt: Args.MakeArgString(Str: "-dll" )); |
188 | |
189 | SmallString<128> ImplibName(Output.getFilename()); |
190 | llvm::sys::path::replace_extension(path&: ImplibName, extension: "lib" ); |
191 | CmdArgs.push_back(Elt: Args.MakeArgString(Str: std::string("-implib:" ) + ImplibName)); |
192 | } |
193 | |
194 | if (TC.getSanitizerArgs(JobArgs: Args).needsFuzzer()) { |
195 | if (!Args.hasArg(Ids: options::OPT_shared)) |
196 | CmdArgs.push_back( |
197 | Elt: Args.MakeArgString(Str: std::string("-wholearchive:" ) + |
198 | TC.getCompilerRTArgString(Args, Component: "fuzzer" ))); |
199 | CmdArgs.push_back(Elt: Args.MakeArgString(Str: "-debug" )); |
200 | // Prevent the linker from padding sections we use for instrumentation |
201 | // arrays. |
202 | CmdArgs.push_back(Elt: Args.MakeArgString(Str: "-incremental:no" )); |
203 | } |
204 | |
205 | if (TC.getSanitizerArgs(JobArgs: Args).needsAsanRt()) { |
206 | CmdArgs.push_back(Elt: Args.MakeArgString(Str: "-debug" )); |
207 | CmdArgs.push_back(Elt: Args.MakeArgString(Str: "-incremental:no" )); |
208 | CmdArgs.push_back(Elt: TC.getCompilerRTArgString(Args, Component: "asan_dynamic" )); |
209 | auto defines = Args.getAllArgValues(Id: options::OPT_D); |
210 | if (Args.hasArg(Ids: options::OPT__SLASH_MD, Ids: options::OPT__SLASH_MDd) || |
211 | llvm::is_contained(Range&: defines, Element: "_DLL" )) { |
212 | // Make sure the dynamic runtime thunk is not optimized out at link time |
213 | // to ensure proper SEH handling. |
214 | CmdArgs.push_back(Elt: Args.MakeArgString( |
215 | Str: TC.getArch() == llvm::Triple::x86 |
216 | ? "-include:___asan_seh_interceptor" |
217 | : "-include:__asan_seh_interceptor" )); |
218 | // Make sure the linker consider all object files from the dynamic runtime |
219 | // thunk. |
220 | CmdArgs.push_back(Elt: Args.MakeArgString( |
221 | Str: std::string("-wholearchive:" ) + |
222 | TC.getCompilerRT(Args, Component: "asan_dynamic_runtime_thunk" ))); |
223 | } else { |
224 | // Make sure the linker consider all object files from the static runtime |
225 | // thunk. |
226 | CmdArgs.push_back(Elt: Args.MakeArgString( |
227 | Str: std::string("-wholearchive:" ) + |
228 | TC.getCompilerRT(Args, Component: "asan_static_runtime_thunk" ))); |
229 | } |
230 | } |
231 | |
232 | if (C.getDriver().isUsingLTO()) { |
233 | if (Arg *A = tools::getLastProfileSampleUseArg(Args)) |
234 | CmdArgs.push_back(Elt: Args.MakeArgString(Str: std::string("-lto-sample-profile:" ) + |
235 | A->getValue())); |
236 | } |
237 | Args.AddAllArgValues(Output&: CmdArgs, Id0: options::OPT__SLASH_link); |
238 | |
239 | // Control Flow Guard checks |
240 | for (const Arg *A : Args.filtered(Ids: options::OPT__SLASH_guard)) { |
241 | StringRef GuardArgs = A->getValue(); |
242 | if (GuardArgs.equals_insensitive(RHS: "cf" ) || |
243 | GuardArgs.equals_insensitive(RHS: "cf,nochecks" )) { |
244 | // MSVC doesn't yet support the "nochecks" modifier. |
245 | CmdArgs.push_back(Elt: "-guard:cf" ); |
246 | } else if (GuardArgs.equals_insensitive(RHS: "cf-" )) { |
247 | CmdArgs.push_back(Elt: "-guard:cf-" ); |
248 | } else if (GuardArgs.equals_insensitive(RHS: "ehcont" )) { |
249 | CmdArgs.push_back(Elt: "-guard:ehcont" ); |
250 | } else if (GuardArgs.equals_insensitive(RHS: "ehcont-" )) { |
251 | CmdArgs.push_back(Elt: "-guard:ehcont-" ); |
252 | } |
253 | } |
254 | |
255 | if (Args.hasFlag(Pos: options::OPT_fopenmp, PosAlias: options::OPT_fopenmp_EQ, |
256 | Neg: options::OPT_fno_openmp, Default: false)) { |
257 | CmdArgs.push_back(Elt: "-nodefaultlib:vcomp.lib" ); |
258 | CmdArgs.push_back(Elt: "-nodefaultlib:vcompd.lib" ); |
259 | CmdArgs.push_back(Elt: Args.MakeArgString(Str: std::string("-libpath:" ) + |
260 | TC.getDriver().Dir + "/../lib" )); |
261 | switch (TC.getDriver().getOpenMPRuntime(Args)) { |
262 | case Driver::OMPRT_OMP: |
263 | CmdArgs.push_back(Elt: "-defaultlib:libomp.lib" ); |
264 | break; |
265 | case Driver::OMPRT_IOMP5: |
266 | CmdArgs.push_back(Elt: "-defaultlib:libiomp5md.lib" ); |
267 | break; |
268 | case Driver::OMPRT_GOMP: |
269 | break; |
270 | case Driver::OMPRT_Unknown: |
271 | // Already diagnosed. |
272 | break; |
273 | } |
274 | } |
275 | |
276 | // Add compiler-rt lib in case if it was explicitly |
277 | // specified as an argument for --rtlib option. |
278 | if (!Args.hasArg(Ids: options::OPT_nostdlib)) { |
279 | AddRunTimeLibs(TC, D: TC.getDriver(), CmdArgs, Args); |
280 | } |
281 | |
282 | StringRef Linker = |
283 | Args.getLastArgValue(Id: options::OPT_fuse_ld_EQ, CLANG_DEFAULT_LINKER); |
284 | if (Linker.empty()) |
285 | Linker = "link" ; |
286 | // We need to translate 'lld' into 'lld-link'. |
287 | else if (Linker.equals_insensitive(RHS: "lld" )) |
288 | Linker = "lld-link" ; |
289 | |
290 | if (Linker == "lld-link" ) { |
291 | for (Arg *A : Args.filtered(Ids: options::OPT_vfsoverlay)) |
292 | CmdArgs.push_back( |
293 | Elt: Args.MakeArgString(Str: std::string("/vfsoverlay:" ) + A->getValue())); |
294 | |
295 | if (C.getDriver().isUsingLTO() && |
296 | Args.hasFlag(Pos: options::OPT_gsplit_dwarf, Neg: options::OPT_gno_split_dwarf, |
297 | Default: false)) |
298 | CmdArgs.push_back(Elt: Args.MakeArgString(Str: Twine("/dwodir:" ) + |
299 | Output.getFilename() + "_dwo" )); |
300 | } |
301 | |
302 | // Add filenames, libraries, and other linker inputs. |
303 | for (const auto &Input : Inputs) { |
304 | if (Input.isFilename()) { |
305 | CmdArgs.push_back(Elt: Input.getFilename()); |
306 | continue; |
307 | } |
308 | |
309 | const Arg &A = Input.getInputArg(); |
310 | |
311 | // Render -l options differently for the MSVC linker. |
312 | if (A.getOption().matches(ID: options::OPT_l)) { |
313 | StringRef Lib = A.getValue(); |
314 | const char *LinkLibArg; |
315 | if (Lib.ends_with(Suffix: ".lib" )) |
316 | LinkLibArg = Args.MakeArgString(Str: Lib); |
317 | else |
318 | LinkLibArg = Args.MakeArgString(Str: Lib + ".lib" ); |
319 | CmdArgs.push_back(Elt: LinkLibArg); |
320 | continue; |
321 | } |
322 | |
323 | // Otherwise, this is some other kind of linker input option like -Wl, -z, |
324 | // or -L. Render it, even if MSVC doesn't understand it. |
325 | A.renderAsInput(Args, Output&: CmdArgs); |
326 | } |
327 | |
328 | addHIPRuntimeLibArgs(TC, C, Args, CmdArgs); |
329 | |
330 | TC.addProfileRTLibs(Args, CmdArgs); |
331 | |
332 | std::vector<const char *> Environment; |
333 | |
334 | // We need to special case some linker paths. In the case of the regular msvc |
335 | // linker, we need to use a special search algorithm. |
336 | llvm::SmallString<128> linkPath; |
337 | if (Linker.equals_insensitive(RHS: "link" )) { |
338 | // If we're using the MSVC linker, it's not sufficient to just use link |
339 | // from the program PATH, because other environments like GnuWin32 install |
340 | // their own link.exe which may come first. |
341 | linkPath = FindVisualStudioExecutable(TC, Exe: "link.exe" ); |
342 | |
343 | if (!TC.FoundMSVCInstall() && !canExecute(VFS&: TC.getVFS(), Path: linkPath)) { |
344 | llvm::SmallString<128> ClPath; |
345 | ClPath = TC.GetProgramPath(Name: "cl.exe" ); |
346 | if (canExecute(VFS&: TC.getVFS(), Path: ClPath)) { |
347 | linkPath = llvm::sys::path::parent_path(path: ClPath); |
348 | llvm::sys::path::append(path&: linkPath, a: "link.exe" ); |
349 | if (!canExecute(VFS&: TC.getVFS(), Path: linkPath)) |
350 | C.getDriver().Diag(DiagID: clang::diag::warn_drv_msvc_not_found); |
351 | } else { |
352 | C.getDriver().Diag(DiagID: clang::diag::warn_drv_msvc_not_found); |
353 | } |
354 | } |
355 | |
356 | // Clang handles passing the proper asan libs to the linker, which goes |
357 | // against link.exe's /INFERASANLIBS which automatically finds asan libs. |
358 | if (TC.getSanitizerArgs(JobArgs: Args).needsAsanRt()) |
359 | CmdArgs.push_back(Elt: "/INFERASANLIBS:NO" ); |
360 | |
361 | #ifdef _WIN32 |
362 | // When cross-compiling with VS2017 or newer, link.exe expects to have |
363 | // its containing bin directory at the top of PATH, followed by the |
364 | // native target bin directory. |
365 | // e.g. when compiling for x86 on an x64 host, PATH should start with: |
366 | // /bin/Hostx64/x86;/bin/Hostx64/x64 |
367 | // This doesn't attempt to handle llvm::ToolsetLayout::DevDivInternal. |
368 | if (TC.getIsVS2017OrNewer() && |
369 | llvm::Triple(llvm::sys::getProcessTriple()).getArch() != TC.getArch()) { |
370 | auto HostArch = llvm::Triple(llvm::sys::getProcessTriple()).getArch(); |
371 | |
372 | auto EnvBlockWide = |
373 | std::unique_ptr<wchar_t[], decltype(&FreeEnvironmentStringsW)>( |
374 | GetEnvironmentStringsW(), FreeEnvironmentStringsW); |
375 | if (!EnvBlockWide) |
376 | goto SkipSettingEnvironment; |
377 | |
378 | size_t EnvCount = 0; |
379 | size_t EnvBlockLen = 0; |
380 | while (EnvBlockWide[EnvBlockLen] != L'\0') { |
381 | ++EnvCount; |
382 | EnvBlockLen += std::wcslen(&EnvBlockWide[EnvBlockLen]) + |
383 | 1 /*string null-terminator*/; |
384 | } |
385 | ++EnvBlockLen; // add the block null-terminator |
386 | |
387 | std::string EnvBlock; |
388 | if (!llvm::convertUTF16ToUTF8String( |
389 | llvm::ArrayRef<char>(reinterpret_cast<char *>(EnvBlockWide.get()), |
390 | EnvBlockLen * sizeof(EnvBlockWide[0])), |
391 | EnvBlock)) |
392 | goto SkipSettingEnvironment; |
393 | |
394 | Environment.reserve(EnvCount); |
395 | |
396 | // Now loop over each string in the block and copy them into the |
397 | // environment vector, adjusting the PATH variable as needed when we |
398 | // find it. |
399 | for (const char *Cursor = EnvBlock.data(); *Cursor != '\0';) { |
400 | llvm::StringRef EnvVar(Cursor); |
401 | if (EnvVar.starts_with_insensitive("path=" )) { |
402 | constexpr size_t PrefixLen = 5; // strlen("path=") |
403 | Environment.push_back(Args.MakeArgString( |
404 | EnvVar.substr(0, PrefixLen) + |
405 | TC.getSubDirectoryPath(llvm::SubDirectoryType::Bin) + |
406 | llvm::Twine(llvm::sys::EnvPathSeparator) + |
407 | TC.getSubDirectoryPath(llvm::SubDirectoryType::Bin, HostArch) + |
408 | (EnvVar.size() > PrefixLen |
409 | ? llvm::Twine(llvm::sys::EnvPathSeparator) + |
410 | EnvVar.substr(PrefixLen) |
411 | : "" ))); |
412 | } else { |
413 | Environment.push_back(Args.MakeArgString(EnvVar)); |
414 | } |
415 | Cursor += EnvVar.size() + 1 /*null-terminator*/; |
416 | } |
417 | } |
418 | SkipSettingEnvironment:; |
419 | #endif |
420 | } else { |
421 | linkPath = TC.GetProgramPath(Name: Linker.str().c_str()); |
422 | } |
423 | |
424 | auto LinkCmd = std::make_unique<Command>( |
425 | args: JA, args: *this, args: ResponseFileSupport::AtFileUTF16(), |
426 | args: Args.MakeArgString(Str: linkPath), args&: CmdArgs, args: Inputs, args: Output); |
427 | if (!Environment.empty()) |
428 | LinkCmd->setEnvironment(Environment); |
429 | C.addCommand(C: std::move(LinkCmd)); |
430 | } |
431 | |
432 | MSVCToolChain::MSVCToolChain(const Driver &D, const llvm::Triple &Triple, |
433 | const ArgList &Args) |
434 | : ToolChain(D, Triple, Args), CudaInstallation(D, Triple, Args), |
435 | RocmInstallation(D, Triple, Args), SYCLInstallation(D, Triple, Args) { |
436 | getProgramPaths().push_back(Elt: getDriver().Dir); |
437 | |
438 | std::optional<llvm::StringRef> VCToolsDir, VCToolsVersion; |
439 | if (Arg *A = Args.getLastArg(Ids: options::OPT__SLASH_vctoolsdir)) |
440 | VCToolsDir = A->getValue(); |
441 | if (Arg *A = Args.getLastArg(Ids: options::OPT__SLASH_vctoolsversion)) |
442 | VCToolsVersion = A->getValue(); |
443 | if (Arg *A = Args.getLastArg(Ids: options::OPT__SLASH_winsdkdir)) |
444 | WinSdkDir = A->getValue(); |
445 | if (Arg *A = Args.getLastArg(Ids: options::OPT__SLASH_winsdkversion)) |
446 | WinSdkVersion = A->getValue(); |
447 | if (Arg *A = Args.getLastArg(Ids: options::OPT__SLASH_winsysroot)) |
448 | WinSysRoot = A->getValue(); |
449 | |
450 | // Check the command line first, that's the user explicitly telling us what to |
451 | // use. Check the environment next, in case we're being invoked from a VS |
452 | // command prompt. Failing that, just try to find the newest Visual Studio |
453 | // version we can and use its default VC toolchain. |
454 | llvm::findVCToolChainViaCommandLine(VFS&: getVFS(), VCToolsDir, VCToolsVersion, |
455 | WinSysRoot, Path&: VCToolChainPath, VSLayout) || |
456 | llvm::findVCToolChainViaEnvironment(VFS&: getVFS(), Path&: VCToolChainPath, |
457 | VSLayout) || |
458 | llvm::findVCToolChainViaSetupConfig(VFS&: getVFS(), VCToolsVersion, |
459 | Path&: VCToolChainPath, VSLayout) || |
460 | llvm::findVCToolChainViaRegistry(Path&: VCToolChainPath, VSLayout); |
461 | } |
462 | |
463 | Tool *MSVCToolChain::buildLinker() const { |
464 | return new tools::visualstudio::Linker(*this); |
465 | } |
466 | |
467 | Tool *MSVCToolChain::buildAssembler() const { |
468 | if (getTriple().isOSBinFormatMachO()) |
469 | return new tools::darwin::Assembler(*this); |
470 | getDriver().Diag(DiagID: clang::diag::err_no_external_assembler); |
471 | return nullptr; |
472 | } |
473 | |
474 | ToolChain::UnwindTableLevel |
475 | MSVCToolChain::getDefaultUnwindTableLevel(const ArgList &Args) const { |
476 | // Don't emit unwind tables by default for MachO targets. |
477 | if (getTriple().isOSBinFormatMachO()) |
478 | return UnwindTableLevel::None; |
479 | |
480 | // All non-x86_32 Windows targets require unwind tables. However, LLVM |
481 | // doesn't know how to generate them for all targets, so only enable |
482 | // the ones that are actually implemented. |
483 | if (getArch() == llvm::Triple::x86_64 || getArch() == llvm::Triple::arm || |
484 | getArch() == llvm::Triple::thumb || getArch() == llvm::Triple::aarch64) |
485 | return UnwindTableLevel::Asynchronous; |
486 | |
487 | return UnwindTableLevel::None; |
488 | } |
489 | |
490 | bool MSVCToolChain::isPICDefault() const { |
491 | return getArch() == llvm::Triple::x86_64 || |
492 | getArch() == llvm::Triple::aarch64; |
493 | } |
494 | |
495 | bool MSVCToolChain::isPIEDefault(const llvm::opt::ArgList &Args) const { |
496 | return false; |
497 | } |
498 | |
499 | bool MSVCToolChain::isPICDefaultForced() const { |
500 | return getArch() == llvm::Triple::x86_64 || |
501 | getArch() == llvm::Triple::aarch64; |
502 | } |
503 | |
504 | void MSVCToolChain::AddCudaIncludeArgs(const ArgList &DriverArgs, |
505 | ArgStringList &CC1Args) const { |
506 | CudaInstallation->AddCudaIncludeArgs(DriverArgs, CC1Args); |
507 | } |
508 | |
509 | void MSVCToolChain::AddHIPIncludeArgs(const ArgList &DriverArgs, |
510 | ArgStringList &CC1Args) const { |
511 | RocmInstallation->AddHIPIncludeArgs(DriverArgs, CC1Args); |
512 | } |
513 | |
514 | void MSVCToolChain::addSYCLIncludeArgs(const ArgList &DriverArgs, |
515 | ArgStringList &CC1Args) const { |
516 | SYCLInstallation->addSYCLIncludeArgs(DriverArgs, CC1Args); |
517 | } |
518 | |
519 | void MSVCToolChain::AddHIPRuntimeLibArgs(const ArgList &Args, |
520 | ArgStringList &CmdArgs) const { |
521 | CmdArgs.append(IL: {Args.MakeArgString(Str: StringRef("-libpath:" ) + |
522 | RocmInstallation->getLibPath()), |
523 | "amdhip64.lib" }); |
524 | } |
525 | |
526 | void MSVCToolChain::printVerboseInfo(raw_ostream &OS) const { |
527 | CudaInstallation->print(OS); |
528 | RocmInstallation->print(OS); |
529 | } |
530 | |
531 | std::string |
532 | MSVCToolChain::getSubDirectoryPath(llvm::SubDirectoryType Type, |
533 | llvm::StringRef SubdirParent) const { |
534 | return llvm::getSubDirectoryPath(Type, VSLayout, VCToolChainPath, TargetArch: getArch(), |
535 | SubdirParent); |
536 | } |
537 | |
538 | std::string |
539 | MSVCToolChain::getSubDirectoryPath(llvm::SubDirectoryType Type, |
540 | llvm::Triple::ArchType TargetArch) const { |
541 | return llvm::getSubDirectoryPath(Type, VSLayout, VCToolChainPath, TargetArch, |
542 | SubdirParent: "" ); |
543 | } |
544 | |
545 | // Find the most recent version of Universal CRT or Windows 10 SDK. |
546 | // vcvarsqueryregistry.bat from Visual Studio 2015 sorts entries in the include |
547 | // directory by name and uses the last one of the list. |
548 | // So we compare entry names lexicographically to find the greatest one. |
549 | // Gets the library path required to link against the Windows SDK. |
550 | bool MSVCToolChain::getWindowsSDKLibraryPath(const ArgList &Args, |
551 | std::string &path) const { |
552 | std::string sdkPath; |
553 | int sdkMajor = 0; |
554 | std::string windowsSDKIncludeVersion; |
555 | std::string windowsSDKLibVersion; |
556 | |
557 | path.clear(); |
558 | if (!llvm::getWindowsSDKDir(VFS&: getVFS(), WinSdkDir, WinSdkVersion, WinSysRoot, |
559 | Path&: sdkPath, Major&: sdkMajor, WindowsSDKIncludeVersion&: windowsSDKIncludeVersion, |
560 | WindowsSDKLibVersion&: windowsSDKLibVersion)) |
561 | return false; |
562 | |
563 | llvm::SmallString<128> libPath(sdkPath); |
564 | llvm::sys::path::append(path&: libPath, a: "Lib" ); |
565 | if (sdkMajor >= 10) |
566 | if (!(WinSdkDir.has_value() || WinSysRoot.has_value()) && |
567 | WinSdkVersion.has_value()) |
568 | windowsSDKLibVersion = *WinSdkVersion; |
569 | if (sdkMajor >= 8) |
570 | llvm::sys::path::append(path&: libPath, a: windowsSDKLibVersion, b: "um" ); |
571 | return llvm::appendArchToWindowsSDKLibPath(SDKMajor: sdkMajor, LibPath: libPath, Arch: getArch(), |
572 | path); |
573 | } |
574 | |
575 | bool MSVCToolChain::useUniversalCRT() const { |
576 | return llvm::useUniversalCRT(VSLayout, VCToolChainPath, TargetArch: getArch(), VFS&: getVFS()); |
577 | } |
578 | |
579 | bool MSVCToolChain::getUniversalCRTLibraryPath(const ArgList &Args, |
580 | std::string &Path) const { |
581 | std::string UniversalCRTSdkPath; |
582 | std::string UCRTVersion; |
583 | |
584 | Path.clear(); |
585 | if (!llvm::getUniversalCRTSdkDir(VFS&: getVFS(), WinSdkDir, WinSdkVersion, |
586 | WinSysRoot, Path&: UniversalCRTSdkPath, |
587 | UCRTVersion)) |
588 | return false; |
589 | |
590 | if (!(WinSdkDir.has_value() || WinSysRoot.has_value()) && |
591 | WinSdkVersion.has_value()) |
592 | UCRTVersion = *WinSdkVersion; |
593 | |
594 | StringRef ArchName = llvm::archToWindowsSDKArch(Arch: getArch()); |
595 | if (ArchName.empty()) |
596 | return false; |
597 | |
598 | llvm::SmallString<128> LibPath(UniversalCRTSdkPath); |
599 | llvm::sys::path::append(path&: LibPath, a: "Lib" , b: UCRTVersion, c: "ucrt" , d: ArchName); |
600 | |
601 | Path = std::string(LibPath); |
602 | return true; |
603 | } |
604 | |
605 | static VersionTuple getMSVCVersionFromExe(const std::string &BinDir) { |
606 | VersionTuple Version; |
607 | #ifdef _WIN32 |
608 | SmallString<128> ClExe(BinDir); |
609 | llvm::sys::path::append(ClExe, "cl.exe" ); |
610 | |
611 | std::wstring ClExeWide; |
612 | if (!llvm::ConvertUTF8toWide(ClExe.c_str(), ClExeWide)) |
613 | return Version; |
614 | |
615 | const DWORD VersionSize = ::GetFileVersionInfoSizeW(ClExeWide.c_str(), |
616 | nullptr); |
617 | if (VersionSize == 0) |
618 | return Version; |
619 | |
620 | SmallVector<uint8_t, 4 * 1024> VersionBlock(VersionSize); |
621 | if (!::GetFileVersionInfoW(ClExeWide.c_str(), 0, VersionSize, |
622 | VersionBlock.data())) |
623 | return Version; |
624 | |
625 | VS_FIXEDFILEINFO *FileInfo = nullptr; |
626 | UINT FileInfoSize = 0; |
627 | if (!::VerQueryValueW(VersionBlock.data(), L"\\" , |
628 | reinterpret_cast<LPVOID *>(&FileInfo), &FileInfoSize) || |
629 | FileInfoSize < sizeof(*FileInfo)) |
630 | return Version; |
631 | |
632 | const unsigned Major = (FileInfo->dwFileVersionMS >> 16) & 0xFFFF; |
633 | const unsigned Minor = (FileInfo->dwFileVersionMS ) & 0xFFFF; |
634 | const unsigned Micro = (FileInfo->dwFileVersionLS >> 16) & 0xFFFF; |
635 | |
636 | Version = VersionTuple(Major, Minor, Micro); |
637 | #endif |
638 | return Version; |
639 | } |
640 | |
641 | void MSVCToolChain::AddSystemIncludeWithSubfolder( |
642 | const ArgList &DriverArgs, ArgStringList &CC1Args, |
643 | const std::string &folder, const Twine &subfolder1, const Twine &subfolder2, |
644 | const Twine &subfolder3) const { |
645 | llvm::SmallString<128> path(folder); |
646 | llvm::sys::path::append(path, a: subfolder1, b: subfolder2, c: subfolder3); |
647 | addSystemInclude(DriverArgs, CC1Args, Path: path); |
648 | } |
649 | |
650 | void MSVCToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs, |
651 | ArgStringList &CC1Args) const { |
652 | if (DriverArgs.hasArg(Ids: options::OPT_nostdinc)) |
653 | return; |
654 | |
655 | if (!DriverArgs.hasArg(Ids: options::OPT_nobuiltininc)) { |
656 | AddSystemIncludeWithSubfolder(DriverArgs, CC1Args, folder: getDriver().ResourceDir, |
657 | subfolder1: "include" ); |
658 | } |
659 | |
660 | // Add %INCLUDE%-like directories from the -imsvc flag. |
661 | for (const auto &Path : DriverArgs.getAllArgValues(Id: options::OPT__SLASH_imsvc)) |
662 | addSystemInclude(DriverArgs, CC1Args, Path); |
663 | |
664 | auto AddSystemIncludesFromEnv = [&](StringRef Var) -> bool { |
665 | if (auto Val = llvm::sys::Process::GetEnv(name: Var)) { |
666 | SmallVector<StringRef, 8> Dirs; |
667 | StringRef(*Val).split(A&: Dirs, Separator: ";" , /*MaxSplit=*/-1, /*KeepEmpty=*/false); |
668 | if (!Dirs.empty()) { |
669 | addSystemIncludes(DriverArgs, CC1Args, Paths: Dirs); |
670 | return true; |
671 | } |
672 | } |
673 | return false; |
674 | }; |
675 | |
676 | // Add %INCLUDE%-like dirs via /external:env: flags. |
677 | for (const auto &Var : |
678 | DriverArgs.getAllArgValues(Id: options::OPT__SLASH_external_env)) { |
679 | AddSystemIncludesFromEnv(Var); |
680 | } |
681 | |
682 | // Add DIA SDK include if requested. |
683 | if (const Arg *A = DriverArgs.getLastArg(Ids: options::OPT__SLASH_diasdkdir, |
684 | Ids: options::OPT__SLASH_winsysroot)) { |
685 | // cl.exe doesn't find the DIA SDK automatically, so this too requires |
686 | // explicit flags and doesn't automatically look in "DIA SDK" relative |
687 | // to the path we found for VCToolChainPath. |
688 | llvm::SmallString<128> DIASDKPath(A->getValue()); |
689 | if (A->getOption().getID() == options::OPT__SLASH_winsysroot) |
690 | llvm::sys::path::append(path&: DIASDKPath, a: "DIA SDK" ); |
691 | AddSystemIncludeWithSubfolder(DriverArgs, CC1Args, folder: std::string(DIASDKPath), |
692 | subfolder1: "include" ); |
693 | } |
694 | |
695 | if (DriverArgs.hasArg(Ids: options::OPT_nostdlibinc)) |
696 | return; |
697 | |
698 | // Honor %INCLUDE% and %EXTERNAL_INCLUDE%. It should have essential search |
699 | // paths set by vcvarsall.bat. Skip if the user expressly set any of the |
700 | // Windows SDK or VC Tools options. |
701 | if (!DriverArgs.hasArg( |
702 | Ids: options::OPT__SLASH_vctoolsdir, Ids: options::OPT__SLASH_vctoolsversion, |
703 | Ids: options::OPT__SLASH_winsysroot, Ids: options::OPT__SLASH_winsdkdir, |
704 | Ids: options::OPT__SLASH_winsdkversion)) { |
705 | bool Found = AddSystemIncludesFromEnv("INCLUDE" ); |
706 | Found |= AddSystemIncludesFromEnv("EXTERNAL_INCLUDE" ); |
707 | if (Found) |
708 | return; |
709 | } |
710 | |
711 | // When built with access to the proper Windows APIs, try to actually find |
712 | // the correct include paths first. |
713 | if (!VCToolChainPath.empty()) { |
714 | addSystemInclude(DriverArgs, CC1Args, |
715 | Path: getSubDirectoryPath(Type: llvm::SubDirectoryType::Include)); |
716 | addSystemInclude( |
717 | DriverArgs, CC1Args, |
718 | Path: getSubDirectoryPath(Type: llvm::SubDirectoryType::Include, SubdirParent: "atlmfc" )); |
719 | |
720 | if (useUniversalCRT()) { |
721 | std::string UniversalCRTSdkPath; |
722 | std::string UCRTVersion; |
723 | if (llvm::getUniversalCRTSdkDir(VFS&: getVFS(), WinSdkDir, WinSdkVersion, |
724 | WinSysRoot, Path&: UniversalCRTSdkPath, |
725 | UCRTVersion)) { |
726 | if (!(WinSdkDir.has_value() || WinSysRoot.has_value()) && |
727 | WinSdkVersion.has_value()) |
728 | UCRTVersion = *WinSdkVersion; |
729 | AddSystemIncludeWithSubfolder(DriverArgs, CC1Args, folder: UniversalCRTSdkPath, |
730 | subfolder1: "Include" , subfolder2: UCRTVersion, subfolder3: "ucrt" ); |
731 | } |
732 | } |
733 | |
734 | std::string WindowsSDKDir; |
735 | int major = 0; |
736 | std::string windowsSDKIncludeVersion; |
737 | std::string windowsSDKLibVersion; |
738 | if (llvm::getWindowsSDKDir(VFS&: getVFS(), WinSdkDir, WinSdkVersion, WinSysRoot, |
739 | Path&: WindowsSDKDir, Major&: major, WindowsSDKIncludeVersion&: windowsSDKIncludeVersion, |
740 | WindowsSDKLibVersion&: windowsSDKLibVersion)) { |
741 | if (major >= 10) |
742 | if (!(WinSdkDir.has_value() || WinSysRoot.has_value()) && |
743 | WinSdkVersion.has_value()) |
744 | windowsSDKIncludeVersion = windowsSDKLibVersion = *WinSdkVersion; |
745 | if (major >= 8) { |
746 | // Note: windowsSDKIncludeVersion is empty for SDKs prior to v10. |
747 | // Anyway, llvm::sys::path::append is able to manage it. |
748 | AddSystemIncludeWithSubfolder(DriverArgs, CC1Args, folder: WindowsSDKDir, |
749 | subfolder1: "Include" , subfolder2: windowsSDKIncludeVersion, |
750 | subfolder3: "shared" ); |
751 | AddSystemIncludeWithSubfolder(DriverArgs, CC1Args, folder: WindowsSDKDir, |
752 | subfolder1: "Include" , subfolder2: windowsSDKIncludeVersion, |
753 | subfolder3: "um" ); |
754 | AddSystemIncludeWithSubfolder(DriverArgs, CC1Args, folder: WindowsSDKDir, |
755 | subfolder1: "Include" , subfolder2: windowsSDKIncludeVersion, |
756 | subfolder3: "winrt" ); |
757 | if (major >= 10) { |
758 | llvm::VersionTuple Tuple; |
759 | if (!Tuple.tryParse(string: windowsSDKIncludeVersion) && |
760 | Tuple.getSubminor().value_or(u: 0) >= 17134) { |
761 | AddSystemIncludeWithSubfolder(DriverArgs, CC1Args, folder: WindowsSDKDir, |
762 | subfolder1: "Include" , subfolder2: windowsSDKIncludeVersion, |
763 | subfolder3: "cppwinrt" ); |
764 | } |
765 | } |
766 | } else { |
767 | AddSystemIncludeWithSubfolder(DriverArgs, CC1Args, folder: WindowsSDKDir, |
768 | subfolder1: "Include" ); |
769 | } |
770 | } |
771 | |
772 | return; |
773 | } |
774 | |
775 | #if defined(_WIN32) |
776 | // As a fallback, select default install paths. |
777 | // FIXME: Don't guess drives and paths like this on Windows. |
778 | const StringRef Paths[] = { |
779 | "C:/Program Files/Microsoft Visual Studio 10.0/VC/include" , |
780 | "C:/Program Files/Microsoft Visual Studio 9.0/VC/include" , |
781 | "C:/Program Files/Microsoft Visual Studio 9.0/VC/PlatformSDK/Include" , |
782 | "C:/Program Files/Microsoft Visual Studio 8/VC/include" , |
783 | "C:/Program Files/Microsoft Visual Studio 8/VC/PlatformSDK/Include" |
784 | }; |
785 | addSystemIncludes(DriverArgs, CC1Args, Paths); |
786 | #endif |
787 | } |
788 | |
789 | void MSVCToolChain::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs, |
790 | ArgStringList &CC1Args) const { |
791 | // FIXME: There should probably be logic here to find libc++ on Windows. |
792 | } |
793 | |
794 | VersionTuple MSVCToolChain::computeMSVCVersion(const Driver *D, |
795 | const ArgList &Args) const { |
796 | bool IsWindowsMSVC = getTriple().isWindowsMSVCEnvironment(); |
797 | VersionTuple MSVT = ToolChain::computeMSVCVersion(D, Args); |
798 | if (MSVT.empty()) |
799 | MSVT = getTriple().getEnvironmentVersion(); |
800 | if (MSVT.empty() && IsWindowsMSVC) |
801 | MSVT = |
802 | getMSVCVersionFromExe(BinDir: getSubDirectoryPath(Type: llvm::SubDirectoryType::Bin)); |
803 | if (MSVT.empty() && |
804 | Args.hasFlag(Pos: options::OPT_fms_extensions, Neg: options::OPT_fno_ms_extensions, |
805 | Default: IsWindowsMSVC)) { |
806 | // -fms-compatibility-version=19.33 is default, aka 2022, 17.3 |
807 | // NOTE: when changing this value, also update |
808 | // clang/docs/CommandGuide/clang.rst and clang/docs/UsersManual.rst |
809 | // accordingly. |
810 | MSVT = VersionTuple(19, 33); |
811 | } |
812 | return MSVT; |
813 | } |
814 | |
815 | std::string |
816 | MSVCToolChain::ComputeEffectiveClangTriple(const ArgList &Args, |
817 | types::ID InputType) const { |
818 | // The MSVC version doesn't care about the architecture, even though it |
819 | // may look at the triple internally. |
820 | VersionTuple MSVT = computeMSVCVersion(/*D=*/nullptr, Args); |
821 | MSVT = VersionTuple(MSVT.getMajor(), MSVT.getMinor().value_or(u: 0), |
822 | MSVT.getSubminor().value_or(u: 0)); |
823 | |
824 | // For the rest of the triple, however, a computed architecture name may |
825 | // be needed. |
826 | llvm::Triple Triple(ToolChain::ComputeEffectiveClangTriple(Args, InputType)); |
827 | if (Triple.getEnvironment() == llvm::Triple::MSVC) { |
828 | StringRef ObjFmt = Triple.getEnvironmentName().split(Separator: '-').second; |
829 | if (ObjFmt.empty()) |
830 | Triple.setEnvironmentName((Twine("msvc" ) + MSVT.getAsString()).str()); |
831 | else |
832 | Triple.setEnvironmentName( |
833 | (Twine("msvc" ) + MSVT.getAsString() + Twine('-') + ObjFmt).str()); |
834 | } |
835 | return Triple.getTriple(); |
836 | } |
837 | |
838 | SanitizerMask MSVCToolChain::getSupportedSanitizers() const { |
839 | SanitizerMask Res = ToolChain::getSupportedSanitizers(); |
840 | Res |= SanitizerKind::Address; |
841 | Res |= SanitizerKind::PointerCompare; |
842 | Res |= SanitizerKind::PointerSubtract; |
843 | Res |= SanitizerKind::Fuzzer; |
844 | Res |= SanitizerKind::FuzzerNoLink; |
845 | Res &= ~SanitizerKind::CFIMFCall; |
846 | return Res; |
847 | } |
848 | |
849 | static void TranslateOptArg(Arg *A, llvm::opt::DerivedArgList &DAL, |
850 | bool SupportsForcingFramePointer, |
851 | const char *ExpandChar, const OptTable &Opts) { |
852 | assert(A->getOption().matches(options::OPT__SLASH_O)); |
853 | |
854 | StringRef OptStr = A->getValue(); |
855 | for (size_t I = 0, E = OptStr.size(); I != E; ++I) { |
856 | const char &OptChar = *(OptStr.data() + I); |
857 | switch (OptChar) { |
858 | default: |
859 | break; |
860 | case '1': |
861 | case '2': |
862 | case 'x': |
863 | case 'd': |
864 | // Ignore /O[12xd] flags that aren't the last one on the command line. |
865 | // Only the last one gets expanded. |
866 | if (&OptChar != ExpandChar) { |
867 | A->claim(); |
868 | break; |
869 | } |
870 | if (OptChar == 'd') { |
871 | DAL.AddFlagArg(BaseArg: A, Opt: Opts.getOption(Opt: options::OPT_O0)); |
872 | } else { |
873 | if (OptChar == '1') { |
874 | DAL.AddJoinedArg(BaseArg: A, Opt: Opts.getOption(Opt: options::OPT_O), Value: "s" ); |
875 | } else if (OptChar == '2' || OptChar == 'x') { |
876 | DAL.AddFlagArg(BaseArg: A, Opt: Opts.getOption(Opt: options::OPT_fbuiltin)); |
877 | DAL.AddJoinedArg(BaseArg: A, Opt: Opts.getOption(Opt: options::OPT_O), Value: "3" ); |
878 | } |
879 | if (SupportsForcingFramePointer && |
880 | !DAL.hasArgNoClaim(Ids: options::OPT_fno_omit_frame_pointer)) |
881 | DAL.AddFlagArg(BaseArg: A, Opt: Opts.getOption(Opt: options::OPT_fomit_frame_pointer)); |
882 | if (OptChar == '1' || OptChar == '2') |
883 | DAL.AddFlagArg(BaseArg: A, Opt: Opts.getOption(Opt: options::OPT_ffunction_sections)); |
884 | } |
885 | break; |
886 | case 'b': |
887 | if (I + 1 != E && isdigit(OptStr[I + 1])) { |
888 | switch (OptStr[I + 1]) { |
889 | case '0': |
890 | DAL.AddFlagArg(BaseArg: A, Opt: Opts.getOption(Opt: options::OPT_fno_inline)); |
891 | break; |
892 | case '1': |
893 | DAL.AddFlagArg(BaseArg: A, Opt: Opts.getOption(Opt: options::OPT_finline_hint_functions)); |
894 | break; |
895 | case '2': |
896 | case '3': |
897 | DAL.AddFlagArg(BaseArg: A, Opt: Opts.getOption(Opt: options::OPT_finline_functions)); |
898 | break; |
899 | } |
900 | ++I; |
901 | } |
902 | break; |
903 | case 'g': |
904 | A->claim(); |
905 | break; |
906 | case 'i': |
907 | if (I + 1 != E && OptStr[I + 1] == '-') { |
908 | ++I; |
909 | DAL.AddFlagArg(BaseArg: A, Opt: Opts.getOption(Opt: options::OPT_fno_builtin)); |
910 | } else { |
911 | DAL.AddFlagArg(BaseArg: A, Opt: Opts.getOption(Opt: options::OPT_fbuiltin)); |
912 | } |
913 | break; |
914 | case 's': |
915 | DAL.AddJoinedArg(BaseArg: A, Opt: Opts.getOption(Opt: options::OPT_O), Value: "s" ); |
916 | break; |
917 | case 't': |
918 | DAL.AddJoinedArg(BaseArg: A, Opt: Opts.getOption(Opt: options::OPT_O), Value: "3" ); |
919 | break; |
920 | case 'y': { |
921 | bool OmitFramePointer = true; |
922 | if (I + 1 != E && OptStr[I + 1] == '-') { |
923 | OmitFramePointer = false; |
924 | ++I; |
925 | } |
926 | if (SupportsForcingFramePointer) { |
927 | if (OmitFramePointer) |
928 | DAL.AddFlagArg(BaseArg: A, |
929 | Opt: Opts.getOption(Opt: options::OPT_fomit_frame_pointer)); |
930 | else |
931 | DAL.AddFlagArg( |
932 | BaseArg: A, Opt: Opts.getOption(Opt: options::OPT_fno_omit_frame_pointer)); |
933 | } else { |
934 | // Don't warn about /Oy- in x86-64 builds (where |
935 | // SupportsForcingFramePointer is false). The flag having no effect |
936 | // there is a compiler-internal optimization, and people shouldn't have |
937 | // to special-case their build files for x86-64 clang-cl. |
938 | A->claim(); |
939 | } |
940 | break; |
941 | } |
942 | } |
943 | } |
944 | } |
945 | |
946 | static void TranslateDArg(Arg *A, llvm::opt::DerivedArgList &DAL, |
947 | const OptTable &Opts) { |
948 | assert(A->getOption().matches(options::OPT_D)); |
949 | |
950 | StringRef Val = A->getValue(); |
951 | size_t Hash = Val.find(C: '#'); |
952 | if (Hash == StringRef::npos || Hash > Val.find(C: '=')) { |
953 | DAL.append(A); |
954 | return; |
955 | } |
956 | |
957 | std::string NewVal = std::string(Val); |
958 | NewVal[Hash] = '='; |
959 | DAL.AddJoinedArg(BaseArg: A, Opt: Opts.getOption(Opt: options::OPT_D), Value: NewVal); |
960 | } |
961 | |
962 | static void TranslatePermissive(Arg *A, llvm::opt::DerivedArgList &DAL, |
963 | const OptTable &Opts) { |
964 | DAL.AddFlagArg(BaseArg: A, Opt: Opts.getOption(Opt: options::OPT__SLASH_Zc_twoPhase_)); |
965 | DAL.AddFlagArg(BaseArg: A, Opt: Opts.getOption(Opt: options::OPT_fno_operator_names)); |
966 | } |
967 | |
968 | static void TranslatePermissiveMinus(Arg *A, llvm::opt::DerivedArgList &DAL, |
969 | const OptTable &Opts) { |
970 | DAL.AddFlagArg(BaseArg: A, Opt: Opts.getOption(Opt: options::OPT__SLASH_Zc_twoPhase)); |
971 | DAL.AddFlagArg(BaseArg: A, Opt: Opts.getOption(Opt: options::OPT_foperator_names)); |
972 | } |
973 | |
974 | llvm::opt::DerivedArgList * |
975 | MSVCToolChain::TranslateArgs(const llvm::opt::DerivedArgList &Args, |
976 | StringRef BoundArch, |
977 | Action::OffloadKind OFK) const { |
978 | DerivedArgList *DAL = new DerivedArgList(Args.getBaseArgs()); |
979 | const OptTable &Opts = getDriver().getOpts(); |
980 | |
981 | // /Oy and /Oy- don't have an effect on X86-64 |
982 | bool SupportsForcingFramePointer = getArch() != llvm::Triple::x86_64; |
983 | |
984 | // The -O[12xd] flag actually expands to several flags. We must desugar the |
985 | // flags so that options embedded can be negated. For example, the '-O2' flag |
986 | // enables '-Oy'. Expanding '-O2' into its constituent flags allows us to |
987 | // correctly handle '-O2 -Oy-' where the trailing '-Oy-' disables a single |
988 | // aspect of '-O2'. |
989 | // |
990 | // Note that this expansion logic only applies to the *last* of '[12xd]'. |
991 | |
992 | // First step is to search for the character we'd like to expand. |
993 | const char *ExpandChar = nullptr; |
994 | for (Arg *A : Args.filtered(Ids: options::OPT__SLASH_O)) { |
995 | StringRef OptStr = A->getValue(); |
996 | for (size_t I = 0, E = OptStr.size(); I != E; ++I) { |
997 | char OptChar = OptStr[I]; |
998 | char PrevChar = I > 0 ? OptStr[I - 1] : '0'; |
999 | if (PrevChar == 'b') { |
1000 | // OptChar does not expand; it's an argument to the previous char. |
1001 | continue; |
1002 | } |
1003 | if (OptChar == '1' || OptChar == '2' || OptChar == 'x' || OptChar == 'd') |
1004 | ExpandChar = OptStr.data() + I; |
1005 | } |
1006 | } |
1007 | |
1008 | for (Arg *A : Args) { |
1009 | if (A->getOption().matches(ID: options::OPT__SLASH_O)) { |
1010 | // The -O flag actually takes an amalgam of other options. For example, |
1011 | // '/Ogyb2' is equivalent to '/Og' '/Oy' '/Ob2'. |
1012 | TranslateOptArg(A, DAL&: *DAL, SupportsForcingFramePointer, ExpandChar, Opts); |
1013 | } else if (A->getOption().matches(ID: options::OPT_D)) { |
1014 | // Translate -Dfoo#bar into -Dfoo=bar. |
1015 | TranslateDArg(A, DAL&: *DAL, Opts); |
1016 | } else if (A->getOption().matches(ID: options::OPT__SLASH_permissive)) { |
1017 | // Expand /permissive |
1018 | TranslatePermissive(A, DAL&: *DAL, Opts); |
1019 | } else if (A->getOption().matches(ID: options::OPT__SLASH_permissive_)) { |
1020 | // Expand /permissive- |
1021 | TranslatePermissiveMinus(A, DAL&: *DAL, Opts); |
1022 | } else if (OFK != Action::OFK_HIP) { |
1023 | // HIP Toolchain translates input args by itself. |
1024 | DAL->append(A); |
1025 | } |
1026 | } |
1027 | |
1028 | return DAL; |
1029 | } |
1030 | |
1031 | void MSVCToolChain::addClangTargetOptions( |
1032 | const ArgList &DriverArgs, ArgStringList &CC1Args, |
1033 | Action::OffloadKind DeviceOffloadKind) const { |
1034 | // MSVC STL kindly allows removing all usages of typeid by defining |
1035 | // _HAS_STATIC_RTTI to 0. Do so, when compiling with -fno-rtti |
1036 | if (DriverArgs.hasFlag(Pos: options::OPT_fno_rtti, Neg: options::OPT_frtti, |
1037 | /*Default=*/false)) |
1038 | CC1Args.push_back(Elt: "-D_HAS_STATIC_RTTI=0" ); |
1039 | |
1040 | if (Arg *A = DriverArgs.getLastArgNoClaim(Ids: options::OPT_marm64x)) |
1041 | A->ignoreTargetSpecific(); |
1042 | } |
1043 | |