1 //===--- ToolChain.cpp - Collections of tools for one platform ------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "Tools.h"
11 #include "clang/Driver/ToolChain.h"
12 #include "clang/Basic/ObjCRuntime.h"
13 #include "clang/Driver/Action.h"
14 #include "clang/Driver/Arg.h"
15 #include "clang/Driver/ArgList.h"
16 #include "clang/Driver/Driver.h"
17 #include "clang/Driver/DriverDiagnostic.h"
18 #include "clang/Driver/Option.h"
19 #include "clang/Driver/Options.h"
20 #include "llvm/ADT/StringSwitch.h"
21 #include "llvm/Support/ErrorHandling.h"
22 using namespace clang::driver;
23 using namespace clang;
24
ToolChain(const Driver & D,const llvm::Triple & T,const ArgList & A)25 ToolChain::ToolChain(const Driver &D, const llvm::Triple &T,
26 const ArgList &A)
27 : D(D), Triple(T), Args(A) {
28 }
29
~ToolChain()30 ToolChain::~ToolChain() {
31 // Free tool implementations.
32 for (llvm::DenseMap<unsigned, Tool*>::iterator
33 it = Tools.begin(), ie = Tools.end(); it != ie; ++it)
34 delete it->second;
35 }
36
getDriver() const37 const Driver &ToolChain::getDriver() const {
38 return D;
39 }
40
useIntegratedAs() const41 bool ToolChain::useIntegratedAs() const {
42 return Args.hasFlag(options::OPT_integrated_as,
43 options::OPT_no_integrated_as,
44 IsIntegratedAssemblerDefault());
45 }
46
getDefaultUniversalArchName() const47 std::string ToolChain::getDefaultUniversalArchName() const {
48 // In universal driver terms, the arch name accepted by -arch isn't exactly
49 // the same as the ones that appear in the triple. Roughly speaking, this is
50 // an inverse of the darwin::getArchTypeForDarwinArchName() function, but the
51 // only interesting special case is powerpc.
52 switch (Triple.getArch()) {
53 case llvm::Triple::ppc:
54 return "ppc";
55 case llvm::Triple::ppc64:
56 return "ppc64";
57 default:
58 return Triple.getArchName();
59 }
60 }
61
IsUnwindTablesDefault() const62 bool ToolChain::IsUnwindTablesDefault() const {
63 return false;
64 }
65
SelectTool(const JobAction & JA) const66 Tool &ToolChain::SelectTool(const JobAction &JA) const {
67 Action::ActionClass Key;
68 if (getDriver().ShouldUseClangCompiler(JA))
69 Key = Action::AnalyzeJobClass;
70 else
71 Key = JA.getKind();
72
73 Tool *&T = Tools[Key];
74 if (T)
75 return *T;
76
77 if (getDriver().ShouldUseClangCompiler(JA))
78 T = new tools::Clang(*this);
79 else
80 T = constructTool(Key);
81
82 return *T;
83 }
84
GetFilePath(const char * Name) const85 std::string ToolChain::GetFilePath(const char *Name) const {
86 return D.GetFilePath(Name, *this);
87
88 }
89
GetProgramPath(const char * Name) const90 std::string ToolChain::GetProgramPath(const char *Name) const {
91 return D.GetProgramPath(Name, *this);
92 }
93
LookupTypeForExtension(const char * Ext) const94 types::ID ToolChain::LookupTypeForExtension(const char *Ext) const {
95 return types::lookupTypeForExtension(Ext);
96 }
97
HasNativeLLVMSupport() const98 bool ToolChain::HasNativeLLVMSupport() const {
99 return false;
100 }
101
getDefaultObjCRuntime(bool isNonFragile) const102 ObjCRuntime ToolChain::getDefaultObjCRuntime(bool isNonFragile) const {
103 return ObjCRuntime(isNonFragile ? ObjCRuntime::GNUstep : ObjCRuntime::GCC,
104 VersionTuple());
105 }
106
107 /// getARMTargetCPU - Get the (LLVM) name of the ARM cpu we are targeting.
108 //
109 // FIXME: tblgen this.
getARMTargetCPU(const ArgList & Args,const llvm::Triple & Triple)110 static const char *getARMTargetCPU(const ArgList &Args,
111 const llvm::Triple &Triple) {
112 // For Darwin targets, the -arch option (which is translated to a
113 // corresponding -march option) should determine the architecture
114 // (and the Mach-O slice) regardless of any -mcpu options.
115 if (!Triple.isOSDarwin()) {
116 // FIXME: Warn on inconsistent use of -mcpu and -march.
117 // If we have -mcpu=, use that.
118 if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
119 return A->getValue();
120 }
121
122 StringRef MArch;
123 if (Arg *A = Args.getLastArg(options::OPT_march_EQ)) {
124 // Otherwise, if we have -march= choose the base CPU for that arch.
125 MArch = A->getValue();
126 } else {
127 // Otherwise, use the Arch from the triple.
128 MArch = Triple.getArchName();
129 }
130
131 return llvm::StringSwitch<const char *>(MArch)
132 .Cases("armv2", "armv2a","arm2")
133 .Case("armv3", "arm6")
134 .Case("armv3m", "arm7m")
135 .Cases("armv4", "armv4t", "arm7tdmi")
136 .Cases("armv5", "armv5t", "arm10tdmi")
137 .Cases("armv5e", "armv5te", "arm1026ejs")
138 .Case("armv5tej", "arm926ej-s")
139 .Cases("armv6", "armv6k", "arm1136jf-s")
140 .Case("armv6j", "arm1136j-s")
141 .Cases("armv6z", "armv6zk", "arm1176jzf-s")
142 .Case("armv6t2", "arm1156t2-s")
143 .Cases("armv6m", "armv6-m", "cortex-m0")
144 .Cases("armv7", "armv7a", "armv7-a", "cortex-a8")
145 .Cases("armv7l", "armv7-l", "cortex-a8")
146 .Cases("armv7f", "armv7-f", "cortex-a9-mp")
147 .Cases("armv7s", "armv7-s", "swift")
148 .Cases("armv7r", "armv7-r", "cortex-r4")
149 .Cases("armv7m", "armv7-m", "cortex-m3")
150 .Cases("armv7em", "armv7e-m", "cortex-m4")
151 .Case("ep9312", "ep9312")
152 .Case("iwmmxt", "iwmmxt")
153 .Case("xscale", "xscale")
154 // If all else failed, return the most base CPU LLVM supports.
155 .Default("arm7tdmi");
156 }
157
158 /// getLLVMArchSuffixForARM - Get the LLVM arch name to use for a particular
159 /// CPU.
160 //
161 // FIXME: This is redundant with -mcpu, why does LLVM use this.
162 // FIXME: tblgen this, or kill it!
getLLVMArchSuffixForARM(StringRef CPU)163 static const char *getLLVMArchSuffixForARM(StringRef CPU) {
164 return llvm::StringSwitch<const char *>(CPU)
165 .Cases("arm7tdmi", "arm7tdmi-s", "arm710t", "v4t")
166 .Cases("arm720t", "arm9", "arm9tdmi", "v4t")
167 .Cases("arm920", "arm920t", "arm922t", "v4t")
168 .Cases("arm940t", "ep9312","v4t")
169 .Cases("arm10tdmi", "arm1020t", "v5")
170 .Cases("arm9e", "arm926ej-s", "arm946e-s", "v5e")
171 .Cases("arm966e-s", "arm968e-s", "arm10e", "v5e")
172 .Cases("arm1020e", "arm1022e", "xscale", "iwmmxt", "v5e")
173 .Cases("arm1136j-s", "arm1136jf-s", "arm1176jz-s", "v6")
174 .Cases("arm1176jzf-s", "mpcorenovfp", "mpcore", "v6")
175 .Cases("arm1156t2-s", "arm1156t2f-s", "v6t2")
176 .Cases("cortex-a5", "cortex-a7", "cortex-a8", "v7")
177 .Cases("cortex-a9", "cortex-a15", "v7")
178 .Case("cortex-r5", "v7r")
179 .Case("cortex-m0", "v6m")
180 .Case("cortex-m3", "v7m")
181 .Case("cortex-m4", "v7em")
182 .Case("cortex-a9-mp", "v7f")
183 .Case("swift", "v7s")
184 .Default("");
185 }
186
ComputeLLVMTriple(const ArgList & Args,types::ID InputType) const187 std::string ToolChain::ComputeLLVMTriple(const ArgList &Args,
188 types::ID InputType) const {
189 switch (getTriple().getArch()) {
190 default:
191 return getTripleString();
192
193 case llvm::Triple::arm:
194 case llvm::Triple::thumb: {
195 // FIXME: Factor into subclasses.
196 llvm::Triple Triple = getTriple();
197
198 // Thumb2 is the default for V7 on Darwin.
199 //
200 // FIXME: Thumb should just be another -target-feaure, not in the triple.
201 StringRef Suffix =
202 getLLVMArchSuffixForARM(getARMTargetCPU(Args, Triple));
203 bool ThumbDefault = Suffix.startswith("v6m") ||
204 (Suffix.startswith("v7") && getTriple().isOSDarwin());
205 std::string ArchName = "arm";
206
207 // Assembly files should start in ARM mode.
208 if (InputType != types::TY_PP_Asm &&
209 Args.hasFlag(options::OPT_mthumb, options::OPT_mno_thumb, ThumbDefault))
210 ArchName = "thumb";
211 Triple.setArchName(ArchName + Suffix.str());
212
213 return Triple.getTriple();
214 }
215 }
216 }
217
ComputeEffectiveClangTriple(const ArgList & Args,types::ID InputType) const218 std::string ToolChain::ComputeEffectiveClangTriple(const ArgList &Args,
219 types::ID InputType) const {
220 // Diagnose use of Darwin OS deployment target arguments on non-Darwin.
221 if (Arg *A = Args.getLastArg(options::OPT_mmacosx_version_min_EQ,
222 options::OPT_miphoneos_version_min_EQ,
223 options::OPT_mios_simulator_version_min_EQ))
224 getDriver().Diag(diag::err_drv_clang_unsupported)
225 << A->getAsString(Args);
226
227 return ComputeLLVMTriple(Args, InputType);
228 }
229
AddClangSystemIncludeArgs(const ArgList & DriverArgs,ArgStringList & CC1Args) const230 void ToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
231 ArgStringList &CC1Args) const {
232 // Each toolchain should provide the appropriate include flags.
233 }
234
addClangTargetOptions(const ArgList & DriverArgs,ArgStringList & CC1Args) const235 void ToolChain::addClangTargetOptions(const ArgList &DriverArgs,
236 ArgStringList &CC1Args) const {
237 }
238
GetRuntimeLibType(const ArgList & Args) const239 ToolChain::RuntimeLibType ToolChain::GetRuntimeLibType(
240 const ArgList &Args) const
241 {
242 if (Arg *A = Args.getLastArg(options::OPT_rtlib_EQ)) {
243 StringRef Value = A->getValue();
244 if (Value == "compiler-rt")
245 return ToolChain::RLT_CompilerRT;
246 if (Value == "libgcc")
247 return ToolChain::RLT_Libgcc;
248 getDriver().Diag(diag::err_drv_invalid_rtlib_name)
249 << A->getAsString(Args);
250 }
251
252 return GetDefaultRuntimeLibType();
253 }
254
GetCXXStdlibType(const ArgList & Args) const255 ToolChain::CXXStdlibType ToolChain::GetCXXStdlibType(const ArgList &Args) const{
256 if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) {
257 StringRef Value = A->getValue();
258 if (Value == "libc++")
259 return ToolChain::CST_Libcxx;
260 if (Value == "libstdc++")
261 return ToolChain::CST_Libstdcxx;
262 getDriver().Diag(diag::err_drv_invalid_stdlib_name)
263 << A->getAsString(Args);
264 }
265
266 return ToolChain::CST_Libstdcxx;
267 }
268
269 /// \brief Utility function to add a system include directory to CC1 arguments.
addSystemInclude(const ArgList & DriverArgs,ArgStringList & CC1Args,const Twine & Path)270 /*static*/ void ToolChain::addSystemInclude(const ArgList &DriverArgs,
271 ArgStringList &CC1Args,
272 const Twine &Path) {
273 CC1Args.push_back("-internal-isystem");
274 CC1Args.push_back(DriverArgs.MakeArgString(Path));
275 }
276
277 /// \brief Utility function to add a system include directory with extern "C"
278 /// semantics to CC1 arguments.
279 ///
280 /// Note that this should be used rarely, and only for directories that
281 /// historically and for legacy reasons are treated as having implicit extern
282 /// "C" semantics. These semantics are *ignored* by and large today, but its
283 /// important to preserve the preprocessor changes resulting from the
284 /// classification.
addExternCSystemInclude(const ArgList & DriverArgs,ArgStringList & CC1Args,const Twine & Path)285 /*static*/ void ToolChain::addExternCSystemInclude(const ArgList &DriverArgs,
286 ArgStringList &CC1Args,
287 const Twine &Path) {
288 CC1Args.push_back("-internal-externc-isystem");
289 CC1Args.push_back(DriverArgs.MakeArgString(Path));
290 }
291
292 /// \brief Utility function to add a list of system include directories to CC1.
addSystemIncludes(const ArgList & DriverArgs,ArgStringList & CC1Args,ArrayRef<StringRef> Paths)293 /*static*/ void ToolChain::addSystemIncludes(const ArgList &DriverArgs,
294 ArgStringList &CC1Args,
295 ArrayRef<StringRef> Paths) {
296 for (ArrayRef<StringRef>::iterator I = Paths.begin(), E = Paths.end();
297 I != E; ++I) {
298 CC1Args.push_back("-internal-isystem");
299 CC1Args.push_back(DriverArgs.MakeArgString(*I));
300 }
301 }
302
AddClangCXXStdlibIncludeArgs(const ArgList & DriverArgs,ArgStringList & CC1Args) const303 void ToolChain::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
304 ArgStringList &CC1Args) const {
305 // Header search paths should be handled by each of the subclasses.
306 // Historically, they have not been, and instead have been handled inside of
307 // the CC1-layer frontend. As the logic is hoisted out, this generic function
308 // will slowly stop being called.
309 //
310 // While it is being called, replicate a bit of a hack to propagate the
311 // '-stdlib=' flag down to CC1 so that it can in turn customize the C++
312 // header search paths with it. Once all systems are overriding this
313 // function, the CC1 flag and this line can be removed.
314 DriverArgs.AddAllArgs(CC1Args, options::OPT_stdlib_EQ);
315 }
316
AddCXXStdlibLibArgs(const ArgList & Args,ArgStringList & CmdArgs) const317 void ToolChain::AddCXXStdlibLibArgs(const ArgList &Args,
318 ArgStringList &CmdArgs) const {
319 CXXStdlibType Type = GetCXXStdlibType(Args);
320
321 switch (Type) {
322 case ToolChain::CST_Libcxx:
323 CmdArgs.push_back("-lc++");
324 break;
325
326 case ToolChain::CST_Libstdcxx:
327 CmdArgs.push_back("-lstdc++");
328 break;
329 }
330 }
331
AddCCKextLibArgs(const ArgList & Args,ArgStringList & CmdArgs) const332 void ToolChain::AddCCKextLibArgs(const ArgList &Args,
333 ArgStringList &CmdArgs) const {
334 CmdArgs.push_back("-lcc_kext");
335 }
336
AddFastMathRuntimeIfAvailable(const ArgList & Args,ArgStringList & CmdArgs) const337 bool ToolChain::AddFastMathRuntimeIfAvailable(const ArgList &Args,
338 ArgStringList &CmdArgs) const {
339 // Check if -ffast-math or -funsafe-math is enabled.
340 Arg *A = Args.getLastArg(options::OPT_ffast_math,
341 options::OPT_fno_fast_math,
342 options::OPT_funsafe_math_optimizations,
343 options::OPT_fno_unsafe_math_optimizations);
344
345 if (!A || A->getOption().getID() == options::OPT_fno_fast_math ||
346 A->getOption().getID() == options::OPT_fno_unsafe_math_optimizations)
347 return false;
348
349 // If crtfastmath.o exists add it to the arguments.
350 std::string Path = GetFilePath("crtfastmath.o");
351 if (Path == "crtfastmath.o") // Not found.
352 return false;
353
354 CmdArgs.push_back(Args.MakeArgString(Path));
355 return true;
356 }
357