ToolChain.cpp revision 79cbbdc8affe52591f7ee487a789639aa38331ec 
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/HostInfo.h"
18#include "clang/Driver/ObjCRuntime.h"
19#include "clang/Driver/Options.h"
20#include "llvm/Support/ErrorHandling.h"
21using namespace clang::driver;
22using namespace clang;
23
24ToolChain::ToolChain(const HostInfo &H, const llvm::Triple &T)
25  : Host(H), Triple(T) {
26}
27
28ToolChain::~ToolChain() {
29}
30
31const Driver &ToolChain::getDriver() const {
32 return Host.getDriver();
33}
34
35std::string ToolChain::GetFilePath(const char *Name) const {
36  return Host.getDriver().GetFilePath(Name, *this);
37
38}
39
40std::string ToolChain::GetProgramPath(const char *Name, bool WantFile) const {
41  return Host.getDriver().GetProgramPath(Name, *this, WantFile);
42}
43
44types::ID ToolChain::LookupTypeForExtension(const char *Ext) const {
45  return types::lookupTypeForExtension(Ext);
46}
47
48bool ToolChain::HasNativeLLVMSupport() const {
49  return false;
50}
51
52void ToolChain::configureObjCRuntime(ObjCRuntime &runtime) const {
53  switch (runtime.getKind()) {
54  case ObjCRuntime::NeXT:
55    // Assume a minimal NeXT runtime.
56    runtime.HasARC = false;
57    runtime.HasWeak = 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.HasTerminate = false; // to be added
66    return;
67  }
68  llvm_unreachable("invalid runtime kind!");
69}
70
71/// getARMTargetCPU - Get the (LLVM) name of the ARM cpu we are targeting.
72//
73// FIXME: tblgen this.
74static const char *getARMTargetCPU(const ArgList &Args,
75                                   const llvm::Triple &Triple) {
76  // FIXME: Warn on inconsistent use of -mcpu and -march.
77
78  // If we have -mcpu=, use that.
79  if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
80    return A->getValue(Args);
81
82  StringRef MArch;
83  if (Arg *A = Args.getLastArg(options::OPT_march_EQ)) {
84    // Otherwise, if we have -march= choose the base CPU for that arch.
85    MArch = A->getValue(Args);
86  } else {
87    // Otherwise, use the Arch from the triple.
88    MArch = Triple.getArchName();
89  }
90
91  if (MArch == "armv2" || MArch == "armv2a")
92    return "arm2";
93  if (MArch == "armv3")
94    return "arm6";
95  if (MArch == "armv3m")
96    return "arm7m";
97  if (MArch == "armv4" || MArch == "armv4t")
98    return "arm7tdmi";
99  if (MArch == "armv5" || MArch == "armv5t")
100    return "arm10tdmi";
101  if (MArch == "armv5e" || MArch == "armv5te")
102    return "arm1026ejs";
103  if (MArch == "armv5tej")
104    return "arm926ej-s";
105  if (MArch == "armv6" || MArch == "armv6k")
106    return "arm1136jf-s";
107  if (MArch == "armv6j")
108    return "arm1136j-s";
109  if (MArch == "armv6z" || MArch == "armv6zk")
110    return "arm1176jzf-s";
111  if (MArch == "armv6t2")
112    return "arm1156t2-s";
113  if (MArch == "armv7" || MArch == "armv7a" || MArch == "armv7-a")
114    return "cortex-a8";
115  if (MArch == "armv7r" || MArch == "armv7-r")
116    return "cortex-r4";
117  if (MArch == "armv7m" || MArch == "armv7-m")
118    return "cortex-m3";
119  if (MArch == "ep9312")
120    return "ep9312";
121  if (MArch == "iwmmxt")
122    return "iwmmxt";
123  if (MArch == "xscale")
124    return "xscale";
125  if (MArch == "armv6m" || MArch == "armv6-m")
126    return "cortex-m0";
127
128  // If all else failed, return the most base CPU LLVM supports.
129  return "arm7tdmi";
130}
131
132/// getLLVMArchSuffixForARM - Get the LLVM arch name to use for a particular
133/// CPU.
134//
135// FIXME: This is redundant with -mcpu, why does LLVM use this.
136// FIXME: tblgen this, or kill it!
137static const char *getLLVMArchSuffixForARM(StringRef CPU) {
138  if (CPU == "arm7tdmi" || CPU == "arm7tdmi-s" || CPU == "arm710t" ||
139      CPU == "arm720t" || CPU == "arm9" || CPU == "arm9tdmi" ||
140      CPU == "arm920" || CPU == "arm920t" || CPU == "arm922t" ||
141      CPU == "arm940t" || CPU == "ep9312")
142    return "v4t";
143
144  if (CPU == "arm10tdmi" || CPU == "arm1020t")
145    return "v5";
146
147  if (CPU == "arm9e" || CPU == "arm926ej-s" || CPU == "arm946e-s" ||
148      CPU == "arm966e-s" || CPU == "arm968e-s" || CPU == "arm10e" ||
149      CPU == "arm1020e" || CPU == "arm1022e" || CPU == "xscale" ||
150      CPU == "iwmmxt")
151    return "v5e";
152
153  if (CPU == "arm1136j-s" || CPU == "arm1136jf-s" || CPU == "arm1176jz-s" ||
154      CPU == "arm1176jzf-s" || CPU == "mpcorenovfp" || CPU == "mpcore")
155    return "v6";
156
157  if (CPU == "arm1156t2-s" || CPU == "arm1156t2f-s")
158    return "v6t2";
159
160  if (CPU == "cortex-a8" || CPU == "cortex-a9")
161    return "v7";
162
163  if (CPU == "cortex-m3")
164    return "v7m";
165
166  if (CPU == "cortex-m0")
167    return "v6m";
168
169  return "";
170}
171
172std::string ToolChain::ComputeLLVMTriple(const ArgList &Args,
173                                         types::ID InputType) const {
174  switch (getTriple().getArch()) {
175  default:
176    return getTripleString();
177
178  case llvm::Triple::arm:
179  case llvm::Triple::thumb: {
180    // FIXME: Factor into subclasses.
181    llvm::Triple Triple = getTriple();
182
183    // Thumb2 is the default for V7 on Darwin.
184    //
185    // FIXME: Thumb should just be another -target-feaure, not in the triple.
186    StringRef Suffix =
187      getLLVMArchSuffixForARM(getARMTargetCPU(Args, Triple));
188    bool ThumbDefault = (Suffix == "v7" && getTriple().isOSDarwin());
189    std::string ArchName = "arm";
190
191    // Assembly files should start in ARM mode.
192    if (InputType != types::TY_PP_Asm &&
193        Args.hasFlag(options::OPT_mthumb, options::OPT_mno_thumb, ThumbDefault))
194      ArchName = "thumb";
195    Triple.setArchName(ArchName + Suffix.str());
196
197    return Triple.getTriple();
198  }
199  }
200}
201
202std::string ToolChain::ComputeEffectiveClangTriple(const ArgList &Args,
203                                                   types::ID InputType) const {
204  // Diagnose use of Darwin OS deployment target arguments on non-Darwin.
205  if (Arg *A = Args.getLastArg(options::OPT_mmacosx_version_min_EQ,
206                               options::OPT_miphoneos_version_min_EQ,
207                               options::OPT_mios_simulator_version_min_EQ))
208    getDriver().Diag(diag::err_drv_clang_unsupported)
209      << A->getAsString(Args);
210
211  return ComputeLLVMTriple(Args, InputType);
212}
213
214void ToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
215                                          ArgStringList &CC1Args) const {
216  // Each toolchain should provide the appropriate include flags.
217}
218
219ToolChain::RuntimeLibType ToolChain::GetRuntimeLibType(
220  const ArgList &Args) const
221{
222  if (Arg *A = Args.getLastArg(options::OPT_rtlib_EQ)) {
223    StringRef Value = A->getValue(Args);
224    if (Value == "compiler-rt")
225      return ToolChain::RLT_CompilerRT;
226    if (Value == "libgcc")
227      return ToolChain::RLT_Libgcc;
228    getDriver().Diag(diag::err_drv_invalid_rtlib_name)
229      << A->getAsString(Args);
230  }
231
232  return GetDefaultRuntimeLibType();
233}
234
235ToolChain::CXXStdlibType ToolChain::GetCXXStdlibType(const ArgList &Args) const{
236  if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) {
237    StringRef Value = A->getValue(Args);
238    if (Value == "libc++")
239      return ToolChain::CST_Libcxx;
240    if (Value == "libstdc++")
241      return ToolChain::CST_Libstdcxx;
242    getDriver().Diag(diag::err_drv_invalid_stdlib_name)
243      << A->getAsString(Args);
244  }
245
246  return ToolChain::CST_Libstdcxx;
247}
248
249/// \brief Utility function to add a system include directory to CC1 arguments.
250/*static*/ void ToolChain::addSystemInclude(const ArgList &DriverArgs,
251                                            ArgStringList &CC1Args,
252                                            const Twine &Path) {
253  CC1Args.push_back("-internal-isystem");
254  CC1Args.push_back(DriverArgs.MakeArgString(Path));
255}
256
257/// \brief Utility function to add a system include directory with extern "C"
258/// semantics to CC1 arguments.
259///
260/// Note that this should be used rarely, and only for directories that
261/// historically and for legacy reasons are treated as having implicit extern
262/// "C" semantics. These semantics are *ignored* by and large today, but its
263/// important to preserve the preprocessor changes resulting from the
264/// classification.
265/*static*/ void ToolChain::addExternCSystemInclude(const ArgList &DriverArgs,
266                                                   ArgStringList &CC1Args,
267                                                   const Twine &Path) {
268  CC1Args.push_back("-internal-externc-isystem");
269  CC1Args.push_back(DriverArgs.MakeArgString(Path));
270}
271
272/// \brief Utility function to add a list of system include directories to CC1.
273/*static*/ void ToolChain::addSystemIncludes(const ArgList &DriverArgs,
274                                             ArgStringList &CC1Args,
275                                             ArrayRef<StringRef> Paths) {
276  for (ArrayRef<StringRef>::iterator I = Paths.begin(), E = Paths.end();
277       I != E; ++I) {
278    CC1Args.push_back("-internal-isystem");
279    CC1Args.push_back(DriverArgs.MakeArgString(*I));
280  }
281}
282
283void ToolChain::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
284                                             ArgStringList &CC1Args) const {
285  // Header search paths should be handled by each of the subclasses.
286  // Historically, they have not been, and instead have been handled inside of
287  // the CC1-layer frontend. As the logic is hoisted out, this generic function
288  // will slowly stop being called.
289  //
290  // While it is being called, replicate a bit of a hack to propagate the
291  // '-stdlib=' flag down to CC1 so that it can in turn customize the C++
292  // header search paths with it. Once all systems are overriding this
293  // function, the CC1 flag and this line can be removed.
294  DriverArgs.AddAllArgs(CC1Args, options::OPT_stdlib_EQ);
295}
296
297void ToolChain::AddCXXStdlibLibArgs(const ArgList &Args,
298                                    ArgStringList &CmdArgs) const {
299  CXXStdlibType Type = GetCXXStdlibType(Args);
300
301  switch (Type) {
302  case ToolChain::CST_Libcxx:
303    CmdArgs.push_back("-lc++");
304    break;
305
306  case ToolChain::CST_Libstdcxx:
307    CmdArgs.push_back("-lstdc++");
308    break;
309  }
310}
311
312void ToolChain::AddCCKextLibArgs(const ArgList &Args,
313                                 ArgStringList &CmdArgs) const {
314  CmdArgs.push_back("-lcc_kext");
315}
316