ToolChain.cpp revision 30660a898545416f0fea2d717f16f75640001e38 
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/ObjCRuntime.h"
18#include "clang/Driver/Options.h"
19#include "llvm/Support/ErrorHandling.h"
20using namespace clang::driver;
21using namespace clang;
22
23ToolChain::ToolChain(const Driver &D, const llvm::Triple &T)
24  : D(D), Triple(T) {
25}
26
27ToolChain::~ToolChain() {
28}
29
30const Driver &ToolChain::getDriver() const {
31 return D;
32}
33
34std::string ToolChain::GetFilePath(const char *Name) const {
35  return D.GetFilePath(Name, *this);
36
37}
38
39std::string ToolChain::GetProgramPath(const char *Name, bool WantFile) const {
40  return D.GetProgramPath(Name, *this, WantFile);
41}
42
43types::ID ToolChain::LookupTypeForExtension(const char *Ext) const {
44  return types::lookupTypeForExtension(Ext);
45}
46
47bool ToolChain::HasNativeLLVMSupport() const {
48  return false;
49}
50
51void ToolChain::configureObjCRuntime(ObjCRuntime &runtime) const {
52  switch (runtime.getKind()) {
53  case ObjCRuntime::NeXT:
54    // Assume a minimal NeXT runtime.
55    runtime.HasARC = false;
56    runtime.HasWeak = false;
57    runtime.HasSubscripting = false;
58    runtime.HasTerminate = false;
59    return;
60
61  case ObjCRuntime::GNU:
62    // Assume a maximal GNU runtime.
63    runtime.HasARC = true;
64    runtime.HasWeak = true;
65    runtime.HasSubscripting = false; // to be added
66    runtime.HasTerminate = false; // to be added
67    return;
68  }
69  llvm_unreachable("invalid runtime kind!");
70}
71
72/// getARMTargetCPU - Get the (LLVM) name of the ARM cpu we are targeting.
73//
74// FIXME: tblgen this.
75static const char *getARMTargetCPU(const ArgList &Args,
76                                   const llvm::Triple &Triple) {
77  // FIXME: Warn on inconsistent use of -mcpu and -march.
78
79  // If we have -mcpu=, use that.
80  if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
81    return A->getValue(Args);
82
83  StringRef MArch;
84  if (Arg *A = Args.getLastArg(options::OPT_march_EQ)) {
85    // Otherwise, if we have -march= choose the base CPU for that arch.
86    MArch = A->getValue(Args);
87  } else {
88    // Otherwise, use the Arch from the triple.
89    MArch = Triple.getArchName();
90  }
91
92  if (MArch == "armv2" || MArch == "armv2a")
93    return "arm2";
94  if (MArch == "armv3")
95    return "arm6";
96  if (MArch == "armv3m")
97    return "arm7m";
98  if (MArch == "armv4" || MArch == "armv4t")
99    return "arm7tdmi";
100  if (MArch == "armv5" || MArch == "armv5t")
101    return "arm10tdmi";
102  if (MArch == "armv5e" || MArch == "armv5te")
103    return "arm1026ejs";
104  if (MArch == "armv5tej")
105    return "arm926ej-s";
106  if (MArch == "armv6" || MArch == "armv6k")
107    return "arm1136jf-s";
108  if (MArch == "armv6j")
109    return "arm1136j-s";
110  if (MArch == "armv6z" || MArch == "armv6zk")
111    return "arm1176jzf-s";
112  if (MArch == "armv6t2")
113    return "arm1156t2-s";
114  if (MArch == "armv7" || MArch == "armv7a" || MArch == "armv7-a")
115    return "cortex-a8";
116  if (MArch == "armv7r" || MArch == "armv7-r")
117    return "cortex-r4";
118  if (MArch == "armv7m" || MArch == "armv7-m")
119    return "cortex-m3";
120  if (MArch == "ep9312")
121    return "ep9312";
122  if (MArch == "iwmmxt")
123    return "iwmmxt";
124  if (MArch == "xscale")
125    return "xscale";
126  if (MArch == "armv6m" || MArch == "armv6-m")
127    return "cortex-m0";
128
129  // If all else failed, return the most base CPU LLVM supports.
130  return "arm7tdmi";
131}
132
133/// getLLVMArchSuffixForARM - Get the LLVM arch name to use for a particular
134/// CPU.
135//
136// FIXME: This is redundant with -mcpu, why does LLVM use this.
137// FIXME: tblgen this, or kill it!
138static const char *getLLVMArchSuffixForARM(StringRef CPU) {
139  if (CPU == "arm7tdmi" || CPU == "arm7tdmi-s" || CPU == "arm710t" ||
140      CPU == "arm720t" || CPU == "arm9" || CPU == "arm9tdmi" ||
141      CPU == "arm920" || CPU == "arm920t" || CPU == "arm922t" ||
142      CPU == "arm940t" || CPU == "ep9312")
143    return "v4t";
144
145  if (CPU == "arm10tdmi" || CPU == "arm1020t")
146    return "v5";
147
148  if (CPU == "arm9e" || CPU == "arm926ej-s" || CPU == "arm946e-s" ||
149      CPU == "arm966e-s" || CPU == "arm968e-s" || CPU == "arm10e" ||
150      CPU == "arm1020e" || CPU == "arm1022e" || CPU == "xscale" ||
151      CPU == "iwmmxt")
152    return "v5e";
153
154  if (CPU == "arm1136j-s" || CPU == "arm1136jf-s" || CPU == "arm1176jz-s" ||
155      CPU == "arm1176jzf-s" || CPU == "mpcorenovfp" || CPU == "mpcore")
156    return "v6";
157
158  if (CPU == "arm1156t2-s" || CPU == "arm1156t2f-s")
159    return "v6t2";
160
161  if (CPU == "cortex-a8" || CPU == "cortex-a9")
162    return "v7";
163
164  if (CPU == "cortex-m3")
165    return "v7m";
166
167  if (CPU == "cortex-m0")
168    return "v6m";
169
170  return "";
171}
172
173std::string ToolChain::ComputeLLVMTriple(const ArgList &Args,
174                                         types::ID InputType) const {
175  switch (getTriple().getArch()) {
176  default:
177    return getTripleString();
178
179  case llvm::Triple::arm:
180  case llvm::Triple::thumb: {
181    // FIXME: Factor into subclasses.
182    llvm::Triple Triple = getTriple();
183
184    // Thumb2 is the default for V7 on Darwin.
185    //
186    // FIXME: Thumb should just be another -target-feaure, not in the triple.
187    StringRef Suffix =
188      getLLVMArchSuffixForARM(getARMTargetCPU(Args, Triple));
189    bool ThumbDefault = (Suffix == "v7" && getTriple().isOSDarwin());
190    std::string ArchName = "arm";
191
192    // Assembly files should start in ARM mode.
193    if (InputType != types::TY_PP_Asm &&
194        Args.hasFlag(options::OPT_mthumb, options::OPT_mno_thumb, ThumbDefault))
195      ArchName = "thumb";
196    Triple.setArchName(ArchName + Suffix.str());
197
198    return Triple.getTriple();
199  }
200  }
201}
202
203std::string ToolChain::ComputeEffectiveClangTriple(const ArgList &Args,
204                                                   types::ID InputType) const {
205  // Diagnose use of Darwin OS deployment target arguments on non-Darwin.
206  if (Arg *A = Args.getLastArg(options::OPT_mmacosx_version_min_EQ,
207                               options::OPT_miphoneos_version_min_EQ,
208                               options::OPT_mios_simulator_version_min_EQ))
209    getDriver().Diag(diag::err_drv_clang_unsupported)
210      << A->getAsString(Args);
211
212  return ComputeLLVMTriple(Args, InputType);
213}
214
215void ToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
216                                          ArgStringList &CC1Args) const {
217  // Each toolchain should provide the appropriate include flags.
218}
219
220ToolChain::RuntimeLibType ToolChain::GetRuntimeLibType(
221  const ArgList &Args) const
222{
223  if (Arg *A = Args.getLastArg(options::OPT_rtlib_EQ)) {
224    StringRef Value = A->getValue(Args);
225    if (Value == "compiler-rt")
226      return ToolChain::RLT_CompilerRT;
227    if (Value == "libgcc")
228      return ToolChain::RLT_Libgcc;
229    getDriver().Diag(diag::err_drv_invalid_rtlib_name)
230      << A->getAsString(Args);
231  }
232
233  return GetDefaultRuntimeLibType();
234}
235
236ToolChain::CXXStdlibType ToolChain::GetCXXStdlibType(const ArgList &Args) const{
237  if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) {
238    StringRef Value = A->getValue(Args);
239    if (Value == "libc++")
240      return ToolChain::CST_Libcxx;
241    if (Value == "libstdc++")
242      return ToolChain::CST_Libstdcxx;
243    getDriver().Diag(diag::err_drv_invalid_stdlib_name)
244      << A->getAsString(Args);
245  }
246
247  return ToolChain::CST_Libstdcxx;
248}
249
250/// \brief Utility function to add a system include directory to CC1 arguments.
251/*static*/ void ToolChain::addSystemInclude(const ArgList &DriverArgs,
252                                            ArgStringList &CC1Args,
253                                            const Twine &Path) {
254  CC1Args.push_back("-internal-isystem");
255  CC1Args.push_back(DriverArgs.MakeArgString(Path));
256}
257
258/// \brief Utility function to add a system include directory with extern "C"
259/// semantics to CC1 arguments.
260///
261/// Note that this should be used rarely, and only for directories that
262/// historically and for legacy reasons are treated as having implicit extern
263/// "C" semantics. These semantics are *ignored* by and large today, but its
264/// important to preserve the preprocessor changes resulting from the
265/// classification.
266/*static*/ void ToolChain::addExternCSystemInclude(const ArgList &DriverArgs,
267                                                   ArgStringList &CC1Args,
268                                                   const Twine &Path) {
269  CC1Args.push_back("-internal-externc-isystem");
270  CC1Args.push_back(DriverArgs.MakeArgString(Path));
271}
272
273/// \brief Utility function to add a list of system include directories to CC1.
274/*static*/ void ToolChain::addSystemIncludes(const ArgList &DriverArgs,
275                                             ArgStringList &CC1Args,
276                                             ArrayRef<StringRef> Paths) {
277  for (ArrayRef<StringRef>::iterator I = Paths.begin(), E = Paths.end();
278       I != E; ++I) {
279    CC1Args.push_back("-internal-isystem");
280    CC1Args.push_back(DriverArgs.MakeArgString(*I));
281  }
282}
283
284void ToolChain::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
285                                             ArgStringList &CC1Args) const {
286  // Header search paths should be handled by each of the subclasses.
287  // Historically, they have not been, and instead have been handled inside of
288  // the CC1-layer frontend. As the logic is hoisted out, this generic function
289  // will slowly stop being called.
290  //
291  // While it is being called, replicate a bit of a hack to propagate the
292  // '-stdlib=' flag down to CC1 so that it can in turn customize the C++
293  // header search paths with it. Once all systems are overriding this
294  // function, the CC1 flag and this line can be removed.
295  DriverArgs.AddAllArgs(CC1Args, options::OPT_stdlib_EQ);
296}
297
298void ToolChain::AddCXXStdlibLibArgs(const ArgList &Args,
299                                    ArgStringList &CmdArgs) const {
300  CXXStdlibType Type = GetCXXStdlibType(Args);
301
302  switch (Type) {
303  case ToolChain::CST_Libcxx:
304    CmdArgs.push_back("-lc++");
305    break;
306
307  case ToolChain::CST_Libstdcxx:
308    CmdArgs.push_back("-lstdc++");
309    break;
310  }
311}
312
313void ToolChain::AddCCKextLibArgs(const ArgList &Args,
314                                 ArgStringList &CmdArgs) const {
315  CmdArgs.push_back("-lcc_kext");
316}
317