1 //===--- ToolChain.cpp - Collections of tools for one platform ------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "clang/Driver/ToolChain.h"
12 #include "clang/Driver/Action.h"
13 #include "clang/Driver/Arg.h"
14 #include "clang/Driver/ArgList.h"
15 #include "clang/Driver/Driver.h"
16 #include "clang/Driver/DriverDiagnostic.h"
17 #include "clang/Driver/Option.h"
18 #include "clang/Driver/Options.h"
19 #include "llvm/ADT/StringSwitch.h"
20 #include "llvm/Support/ErrorHandling.h"
21 #include "clang/Basic/ObjCRuntime.h"
22 using namespace clang::driver;
23 using namespace clang;
25 ToolChain::ToolChain(const Driver &D, const llvm::Triple &T)
29 ToolChain::~ToolChain() {
32 const Driver &ToolChain::getDriver() const {
36 std::string ToolChain::getDefaultUniversalArchName() const {
37 // In universal driver terms, the arch name accepted by -arch isn't exactly
38 // the same as the ones that appear in the triple. Roughly speaking, this is
39 // an inverse of the darwin::getArchTypeForDarwinArchName() function, but the
40 // only interesting special case is powerpc.
41 switch (Triple.getArch()) {
42 case llvm::Triple::ppc:
44 case llvm::Triple::ppc64:
47 return Triple.getArchName();
51 bool ToolChain::IsUnwindTablesDefault() const {
55 std::string ToolChain::GetFilePath(const char *Name) const {
56 return D.GetFilePath(Name, *this);
60 std::string ToolChain::GetProgramPath(const char *Name) const {
61 return D.GetProgramPath(Name, *this);
64 types::ID ToolChain::LookupTypeForExtension(const char *Ext) const {
65 return types::lookupTypeForExtension(Ext);
68 bool ToolChain::HasNativeLLVMSupport() const {
72 ObjCRuntime ToolChain::getDefaultObjCRuntime(bool isNonFragile) const {
73 return ObjCRuntime(isNonFragile ? ObjCRuntime::GNUstep : ObjCRuntime::GCC,
77 /// getARMTargetCPU - Get the (LLVM) name of the ARM cpu we are targeting.
79 // FIXME: tblgen this.
80 static const char *getARMTargetCPU(const ArgList &Args,
81 const llvm::Triple &Triple) {
82 // For Darwin targets, the -arch option (which is translated to a
83 // corresponding -march option) should determine the architecture
84 // (and the Mach-O slice) regardless of any -mcpu options.
85 if (!Triple.isOSDarwin()) {
86 // FIXME: Warn on inconsistent use of -mcpu and -march.
87 // If we have -mcpu=, use that.
88 if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
93 if (Arg *A = Args.getLastArg(options::OPT_march_EQ)) {
94 // Otherwise, if we have -march= choose the base CPU for that arch.
95 MArch = A->getValue();
97 // Otherwise, use the Arch from the triple.
98 MArch = Triple.getArchName();
101 return llvm::StringSwitch<const char *>(MArch)
102 .Cases("armv2", "armv2a","arm2")
103 .Case("armv3", "arm6")
104 .Case("armv3m", "arm7m")
105 .Cases("armv4", "armv4t", "arm7tdmi")
106 .Cases("armv5", "armv5t", "arm10tdmi")
107 .Cases("armv5e", "armv5te", "arm1026ejs")
108 .Case("armv5tej", "arm926ej-s")
109 .Cases("armv6", "armv6k", "arm1136jf-s")
110 .Case("armv6j", "arm1136j-s")
111 .Cases("armv6z", "armv6zk", "arm1176jzf-s")
112 .Case("armv6t2", "arm1156t2-s")
113 .Cases("armv7", "armv7a", "armv7-a", "cortex-a8")
114 .Cases("armv7f", "armv7-f", "cortex-a9-mp")
115 .Cases("armv7s", "armv7-s", "swift")
116 .Cases("armv7r", "armv7-r", "cortex-r4")
117 .Cases("armv7m", "armv7-m", "cortex-m3")
118 .Case("ep9312", "ep9312")
119 .Case("iwmmxt", "iwmmxt")
120 .Case("xscale", "xscale")
121 .Cases("armv6m", "armv6-m", "cortex-m0")
122 // If all else failed, return the most base CPU LLVM supports.
123 .Default("arm7tdmi");
126 /// getLLVMArchSuffixForARM - Get the LLVM arch name to use for a particular
129 // FIXME: This is redundant with -mcpu, why does LLVM use this.
130 // FIXME: tblgen this, or kill it!
131 static const char *getLLVMArchSuffixForARM(StringRef CPU) {
132 return llvm::StringSwitch<const char *>(CPU)
133 .Cases("arm7tdmi", "arm7tdmi-s", "arm710t", "v4t")
134 .Cases("arm720t", "arm9", "arm9tdmi", "v4t")
135 .Cases("arm920", "arm920t", "arm922t", "v4t")
136 .Cases("arm940t", "ep9312","v4t")
137 .Cases("arm10tdmi", "arm1020t", "v5")
138 .Cases("arm9e", "arm926ej-s", "arm946e-s", "v5e")
139 .Cases("arm966e-s", "arm968e-s", "arm10e", "v5e")
140 .Cases("arm1020e", "arm1022e", "xscale", "iwmmxt", "v5e")
141 .Cases("arm1136j-s", "arm1136jf-s", "arm1176jz-s", "v6")
142 .Cases("arm1176jzf-s", "mpcorenovfp", "mpcore", "v6")
143 .Cases("arm1156t2-s", "arm1156t2f-s", "v6t2")
144 .Cases("cortex-a8", "cortex-a9", "cortex-a15", "v7")
145 .Case("cortex-m3", "v7m")
146 .Case("cortex-m4", "v7m")
147 .Case("cortex-m0", "v6m")
148 .Case("cortex-a9-mp", "v7f")
149 .Case("swift", "v7s")
153 std::string ToolChain::ComputeLLVMTriple(const ArgList &Args,
154 types::ID InputType) const {
155 switch (getTriple().getArch()) {
157 return getTripleString();
159 case llvm::Triple::arm:
160 case llvm::Triple::thumb: {
161 // FIXME: Factor into subclasses.
162 llvm::Triple Triple = getTriple();
164 // Thumb2 is the default for V7 on Darwin.
166 // FIXME: Thumb should just be another -target-feaure, not in the triple.
168 getLLVMArchSuffixForARM(getARMTargetCPU(Args, Triple));
169 bool ThumbDefault = (Suffix.startswith("v7") && getTriple().isOSDarwin());
170 std::string ArchName = "arm";
172 // Assembly files should start in ARM mode.
173 if (InputType != types::TY_PP_Asm &&
174 Args.hasFlag(options::OPT_mthumb, options::OPT_mno_thumb, ThumbDefault))
176 Triple.setArchName(ArchName + Suffix.str());
178 return Triple.getTriple();
183 std::string ToolChain::ComputeEffectiveClangTriple(const ArgList &Args,
184 types::ID InputType) const {
185 // Diagnose use of Darwin OS deployment target arguments on non-Darwin.
186 if (Arg *A = Args.getLastArg(options::OPT_mmacosx_version_min_EQ,
187 options::OPT_miphoneos_version_min_EQ,
188 options::OPT_mios_simulator_version_min_EQ))
189 getDriver().Diag(diag::err_drv_clang_unsupported)
190 << A->getAsString(Args);
192 return ComputeLLVMTriple(Args, InputType);
195 void ToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
196 ArgStringList &CC1Args) const {
197 // Each toolchain should provide the appropriate include flags.
200 void ToolChain::addClangTargetOptions(ArgStringList &CC1Args) const {
203 ToolChain::RuntimeLibType ToolChain::GetRuntimeLibType(
204 const ArgList &Args) const
206 if (Arg *A = Args.getLastArg(options::OPT_rtlib_EQ)) {
207 StringRef Value = A->getValue();
208 if (Value == "compiler-rt")
209 return ToolChain::RLT_CompilerRT;
210 if (Value == "libgcc")
211 return ToolChain::RLT_Libgcc;
212 getDriver().Diag(diag::err_drv_invalid_rtlib_name)
213 << A->getAsString(Args);
216 return GetDefaultRuntimeLibType();
219 ToolChain::CXXStdlibType ToolChain::GetCXXStdlibType(const ArgList &Args) const{
220 if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) {
221 StringRef Value = A->getValue();
222 if (Value == "libc++")
223 return ToolChain::CST_Libcxx;
224 if (Value == "libstdc++")
225 return ToolChain::CST_Libstdcxx;
226 getDriver().Diag(diag::err_drv_invalid_stdlib_name)
227 << A->getAsString(Args);
230 return ToolChain::CST_Libstdcxx;
233 /// \brief Utility function to add a system include directory to CC1 arguments.
234 /*static*/ void ToolChain::addSystemInclude(const ArgList &DriverArgs,
235 ArgStringList &CC1Args,
237 CC1Args.push_back("-internal-isystem");
238 CC1Args.push_back(DriverArgs.MakeArgString(Path));
241 /// \brief Utility function to add a system include directory with extern "C"
242 /// semantics to CC1 arguments.
244 /// Note that this should be used rarely, and only for directories that
245 /// historically and for legacy reasons are treated as having implicit extern
246 /// "C" semantics. These semantics are *ignored* by and large today, but its
247 /// important to preserve the preprocessor changes resulting from the
249 /*static*/ void ToolChain::addExternCSystemInclude(const ArgList &DriverArgs,
250 ArgStringList &CC1Args,
252 CC1Args.push_back("-internal-externc-isystem");
253 CC1Args.push_back(DriverArgs.MakeArgString(Path));
256 /// \brief Utility function to add a list of system include directories to CC1.
257 /*static*/ void ToolChain::addSystemIncludes(const ArgList &DriverArgs,
258 ArgStringList &CC1Args,
259 ArrayRef<StringRef> Paths) {
260 for (ArrayRef<StringRef>::iterator I = Paths.begin(), E = Paths.end();
262 CC1Args.push_back("-internal-isystem");
263 CC1Args.push_back(DriverArgs.MakeArgString(*I));
267 void ToolChain::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
268 ArgStringList &CC1Args) const {
269 // Header search paths should be handled by each of the subclasses.
270 // Historically, they have not been, and instead have been handled inside of
271 // the CC1-layer frontend. As the logic is hoisted out, this generic function
272 // will slowly stop being called.
274 // While it is being called, replicate a bit of a hack to propagate the
275 // '-stdlib=' flag down to CC1 so that it can in turn customize the C++
276 // header search paths with it. Once all systems are overriding this
277 // function, the CC1 flag and this line can be removed.
278 DriverArgs.AddAllArgs(CC1Args, options::OPT_stdlib_EQ);
281 void ToolChain::AddCXXStdlibLibArgs(const ArgList &Args,
282 ArgStringList &CmdArgs) const {
283 CXXStdlibType Type = GetCXXStdlibType(Args);
286 case ToolChain::CST_Libcxx:
287 CmdArgs.push_back("-lc++");
290 case ToolChain::CST_Libstdcxx:
291 CmdArgs.push_back("-lstdc++");
296 void ToolChain::AddCCKextLibArgs(const ArgList &Args,
297 ArgStringList &CmdArgs) const {
298 CmdArgs.push_back("-lcc_kext");
301 bool ToolChain::AddFastMathRuntimeIfAvailable(const ArgList &Args,
302 ArgStringList &CmdArgs) const {
303 // Check if -ffast-math or -funsafe-math is enabled.
304 Arg *A = Args.getLastArg(options::OPT_ffast_math,
305 options::OPT_fno_fast_math,
306 options::OPT_funsafe_math_optimizations,
307 options::OPT_fno_unsafe_math_optimizations);
309 if (!A || A->getOption().getID() == options::OPT_fno_fast_math ||
310 A->getOption().getID() == options::OPT_fno_unsafe_math_optimizations)
313 // If crtfastmath.o exists add it to the arguments.
314 std::string Path = GetFilePath("crtfastmath.o");
315 if (Path == "crtfastmath.o") // Not found.
318 CmdArgs.push_back(Args.MakeArgString(Path));