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 "clang/Driver/ToolChain.h"
11
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/Options.h"
18 #include "llvm/ADT/StringSwitch.h"
19 #include "llvm/Support/ErrorHandling.h"
20 #include "clang/Basic/ObjCRuntime.h"
21 using namespace clang::driver;
22 using namespace clang;
23
ToolChain(const Driver & D,const llvm::Triple & T)24 ToolChain::ToolChain(const Driver &D, const llvm::Triple &T)
25 : D(D), Triple(T) {
26 }
27
~ToolChain()28 ToolChain::~ToolChain() {
29 }
30
getDriver() const31 const Driver &ToolChain::getDriver() const {
32 return D;
33 }
34
GetFilePath(const char * Name) const35 std::string ToolChain::GetFilePath(const char *Name) const {
36 return D.GetFilePath(Name, *this);
37
38 }
39
GetProgramPath(const char * Name,bool WantFile) const40 std::string ToolChain::GetProgramPath(const char *Name, bool WantFile) const {
41 return D.GetProgramPath(Name, *this, WantFile);
42 }
43
LookupTypeForExtension(const char * Ext) const44 types::ID ToolChain::LookupTypeForExtension(const char *Ext) const {
45 return types::lookupTypeForExtension(Ext);
46 }
47
HasNativeLLVMSupport() const48 bool ToolChain::HasNativeLLVMSupport() const {
49 return false;
50 }
51
getDefaultObjCRuntime(bool isNonFragile) const52 ObjCRuntime ToolChain::getDefaultObjCRuntime(bool isNonFragile) const {
53 return ObjCRuntime(isNonFragile ? ObjCRuntime::GNUstep : ObjCRuntime::GCC,
54 VersionTuple());
55 }
56
57 /// getARMTargetCPU - Get the (LLVM) name of the ARM cpu we are targeting.
58 //
59 // FIXME: tblgen this.
getARMTargetCPU(const ArgList & Args,const llvm::Triple & Triple)60 static const char *getARMTargetCPU(const ArgList &Args,
61 const llvm::Triple &Triple) {
62 // For Darwin targets, the -arch option (which is translated to a
63 // corresponding -march option) should determine the architecture
64 // (and the Mach-O slice) regardless of any -mcpu options.
65 if (!Triple.isOSDarwin()) {
66 // FIXME: Warn on inconsistent use of -mcpu and -march.
67 // If we have -mcpu=, use that.
68 if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
69 return A->getValue(Args);
70 }
71
72 StringRef MArch;
73 if (Arg *A = Args.getLastArg(options::OPT_march_EQ)) {
74 // Otherwise, if we have -march= choose the base CPU for that arch.
75 MArch = A->getValue(Args);
76 } else {
77 // Otherwise, use the Arch from the triple.
78 MArch = Triple.getArchName();
79 }
80
81 return llvm::StringSwitch<const char *>(MArch)
82 .Cases("armv2", "armv2a","arm2")
83 .Case("armv3", "arm6")
84 .Case("armv3m", "arm7m")
85 .Cases("armv4", "armv4t", "arm7tdmi")
86 .Cases("armv5", "armv5t", "arm10tdmi")
87 .Cases("armv5e", "armv5te", "arm1026ejs")
88 .Case("armv5tej", "arm926ej-s")
89 .Cases("armv6", "armv6k", "arm1136jf-s")
90 .Case("armv6j", "arm1136j-s")
91 .Cases("armv6z", "armv6zk", "arm1176jzf-s")
92 .Case("armv6t2", "arm1156t2-s")
93 .Cases("armv7", "armv7a", "armv7-a", "cortex-a8")
94 .Cases("armv7r", "armv7-r", "cortex-r4")
95 .Cases("armv7m", "armv7-m", "cortex-m3")
96 .Case("ep9312", "ep9312")
97 .Case("iwmmxt", "iwmmxt")
98 .Case("xscale", "xscale")
99 .Cases("armv6m", "armv6-m", "cortex-m0")
100 // If all else failed, return the most base CPU LLVM supports.
101 .Default("arm7tdmi");
102 }
103
104 /// getLLVMArchSuffixForARM - Get the LLVM arch name to use for a particular
105 /// CPU.
106 //
107 // FIXME: This is redundant with -mcpu, why does LLVM use this.
108 // FIXME: tblgen this, or kill it!
getLLVMArchSuffixForARM(StringRef CPU)109 static const char *getLLVMArchSuffixForARM(StringRef CPU) {
110 return llvm::StringSwitch<const char *>(CPU)
111 .Cases("arm7tdmi", "arm7tdmi-s", "arm710t", "v4t")
112 .Cases("arm720t", "arm9", "arm9tdmi", "v4t")
113 .Cases("arm920", "arm920t", "arm922t", "v4t")
114 .Cases("arm940t", "ep9312","v4t")
115 .Cases("arm10tdmi", "arm1020t", "v5")
116 .Cases("arm9e", "arm926ej-s", "arm946e-s", "v5e")
117 .Cases("arm966e-s", "arm968e-s", "arm10e", "v5e")
118 .Cases("arm1020e", "arm1022e", "xscale", "iwmmxt", "v5e")
119 .Cases("arm1136j-s", "arm1136jf-s", "arm1176jz-s", "v6")
120 .Cases("arm1176jzf-s", "mpcorenovfp", "mpcore", "v6")
121 .Cases("arm1156t2-s", "arm1156t2f-s", "v6t2")
122 .Cases("cortex-a8", "cortex-a9", "v7")
123 .Case("cortex-m3", "v7m")
124 .Case("cortex-m4", "v7m")
125 .Case("cortex-m0", "v6m")
126 .Default("");
127 }
128
ComputeLLVMTriple(const ArgList & Args,types::ID InputType) const129 std::string ToolChain::ComputeLLVMTriple(const ArgList &Args,
130 types::ID InputType) const {
131 switch (getTriple().getArch()) {
132 default:
133 return getTripleString();
134
135 case llvm::Triple::arm:
136 case llvm::Triple::thumb: {
137 // FIXME: Factor into subclasses.
138 llvm::Triple Triple = getTriple();
139
140 // Thumb2 is the default for V7 on Darwin.
141 //
142 // FIXME: Thumb should just be another -target-feaure, not in the triple.
143 StringRef Suffix =
144 getLLVMArchSuffixForARM(getARMTargetCPU(Args, Triple));
145 bool ThumbDefault = (Suffix == "v7" && getTriple().isOSDarwin());
146 std::string ArchName = "arm";
147
148 // Assembly files should start in ARM mode.
149 if (InputType != types::TY_PP_Asm &&
150 Args.hasFlag(options::OPT_mthumb, options::OPT_mno_thumb, ThumbDefault))
151 ArchName = "thumb";
152 Triple.setArchName(ArchName + Suffix.str());
153
154 return Triple.getTriple();
155 }
156 }
157 }
158
ComputeEffectiveClangTriple(const ArgList & Args,types::ID InputType) const159 std::string ToolChain::ComputeEffectiveClangTriple(const ArgList &Args,
160 types::ID InputType) const {
161 // Diagnose use of Darwin OS deployment target arguments on non-Darwin.
162 if (Arg *A = Args.getLastArg(options::OPT_mmacosx_version_min_EQ,
163 options::OPT_miphoneos_version_min_EQ,
164 options::OPT_mios_simulator_version_min_EQ))
165 getDriver().Diag(diag::err_drv_clang_unsupported)
166 << A->getAsString(Args);
167
168 return ComputeLLVMTriple(Args, InputType);
169 }
170
AddClangSystemIncludeArgs(const ArgList & DriverArgs,ArgStringList & CC1Args) const171 void ToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
172 ArgStringList &CC1Args) const {
173 // Each toolchain should provide the appropriate include flags.
174 }
175
addClangTargetOptions(ArgStringList & CC1Args) const176 void ToolChain::addClangTargetOptions(ArgStringList &CC1Args) const {
177 }
178
GetRuntimeLibType(const ArgList & Args) const179 ToolChain::RuntimeLibType ToolChain::GetRuntimeLibType(
180 const ArgList &Args) const
181 {
182 if (Arg *A = Args.getLastArg(options::OPT_rtlib_EQ)) {
183 StringRef Value = A->getValue(Args);
184 if (Value == "compiler-rt")
185 return ToolChain::RLT_CompilerRT;
186 if (Value == "libgcc")
187 return ToolChain::RLT_Libgcc;
188 getDriver().Diag(diag::err_drv_invalid_rtlib_name)
189 << A->getAsString(Args);
190 }
191
192 return GetDefaultRuntimeLibType();
193 }
194
GetCXXStdlibType(const ArgList & Args) const195 ToolChain::CXXStdlibType ToolChain::GetCXXStdlibType(const ArgList &Args) const{
196 if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) {
197 StringRef Value = A->getValue(Args);
198 if (Value == "libc++")
199 return ToolChain::CST_Libcxx;
200 if (Value == "libstdc++")
201 return ToolChain::CST_Libstdcxx;
202 getDriver().Diag(diag::err_drv_invalid_stdlib_name)
203 << A->getAsString(Args);
204 }
205
206 return ToolChain::CST_Libstdcxx;
207 }
208
209 /// \brief Utility function to add a system include directory to CC1 arguments.
addSystemInclude(const ArgList & DriverArgs,ArgStringList & CC1Args,const Twine & Path)210 /*static*/ void ToolChain::addSystemInclude(const ArgList &DriverArgs,
211 ArgStringList &CC1Args,
212 const Twine &Path) {
213 CC1Args.push_back("-internal-isystem");
214 CC1Args.push_back(DriverArgs.MakeArgString(Path));
215 }
216
217 /// \brief Utility function to add a system include directory with extern "C"
218 /// semantics to CC1 arguments.
219 ///
220 /// Note that this should be used rarely, and only for directories that
221 /// historically and for legacy reasons are treated as having implicit extern
222 /// "C" semantics. These semantics are *ignored* by and large today, but its
223 /// important to preserve the preprocessor changes resulting from the
224 /// classification.
addExternCSystemInclude(const ArgList & DriverArgs,ArgStringList & CC1Args,const Twine & Path)225 /*static*/ void ToolChain::addExternCSystemInclude(const ArgList &DriverArgs,
226 ArgStringList &CC1Args,
227 const Twine &Path) {
228 CC1Args.push_back("-internal-externc-isystem");
229 CC1Args.push_back(DriverArgs.MakeArgString(Path));
230 }
231
232 /// \brief Utility function to add a list of system include directories to CC1.
addSystemIncludes(const ArgList & DriverArgs,ArgStringList & CC1Args,ArrayRef<StringRef> Paths)233 /*static*/ void ToolChain::addSystemIncludes(const ArgList &DriverArgs,
234 ArgStringList &CC1Args,
235 ArrayRef<StringRef> Paths) {
236 for (ArrayRef<StringRef>::iterator I = Paths.begin(), E = Paths.end();
237 I != E; ++I) {
238 CC1Args.push_back("-internal-isystem");
239 CC1Args.push_back(DriverArgs.MakeArgString(*I));
240 }
241 }
242
AddClangCXXStdlibIncludeArgs(const ArgList & DriverArgs,ArgStringList & CC1Args) const243 void ToolChain::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
244 ArgStringList &CC1Args) const {
245 // Header search paths should be handled by each of the subclasses.
246 // Historically, they have not been, and instead have been handled inside of
247 // the CC1-layer frontend. As the logic is hoisted out, this generic function
248 // will slowly stop being called.
249 //
250 // While it is being called, replicate a bit of a hack to propagate the
251 // '-stdlib=' flag down to CC1 so that it can in turn customize the C++
252 // header search paths with it. Once all systems are overriding this
253 // function, the CC1 flag and this line can be removed.
254 DriverArgs.AddAllArgs(CC1Args, options::OPT_stdlib_EQ);
255 }
256
AddCXXStdlibLibArgs(const ArgList & Args,ArgStringList & CmdArgs) const257 void ToolChain::AddCXXStdlibLibArgs(const ArgList &Args,
258 ArgStringList &CmdArgs) const {
259 CXXStdlibType Type = GetCXXStdlibType(Args);
260
261 switch (Type) {
262 case ToolChain::CST_Libcxx:
263 CmdArgs.push_back("-lc++");
264 break;
265
266 case ToolChain::CST_Libstdcxx:
267 CmdArgs.push_back("-lstdc++");
268 break;
269 }
270 }
271
AddCCKextLibArgs(const ArgList & Args,ArgStringList & CmdArgs) const272 void ToolChain::AddCCKextLibArgs(const ArgList &Args,
273 ArgStringList &CmdArgs) const {
274 CmdArgs.push_back("-lcc_kext");
275 }
276