ToolChain.cpp revision f85e193739c953358c865005855253af4f68a497 
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/Options.h"
19
20using namespace clang::driver;
21
22ToolChain::ToolChain(const HostInfo &_Host, const llvm::Triple &_Triple)
23  : Host(_Host), Triple(_Triple) {
24}
25
26ToolChain::~ToolChain() {
27}
28
29const Driver &ToolChain::getDriver() const {
30 return Host.getDriver();
31}
32
33std::string ToolChain::GetFilePath(const char *Name) const {
34  return Host.getDriver().GetFilePath(Name, *this);
35
36}
37
38std::string ToolChain::GetProgramPath(const char *Name, bool WantFile) const {
39  return Host.getDriver().GetProgramPath(Name, *this, WantFile);
40}
41
42types::ID ToolChain::LookupTypeForExtension(const char *Ext) const {
43  return types::lookupTypeForExtension(Ext);
44}
45
46bool ToolChain::HasNativeLLVMSupport() const {
47  return false;
48}
49
50/// getARMTargetCPU - Get the (LLVM) name of the ARM cpu we are targeting.
51//
52// FIXME: tblgen this.
53static const char *getARMTargetCPU(const ArgList &Args,
54                                   const llvm::Triple &Triple) {
55  // FIXME: Warn on inconsistent use of -mcpu and -march.
56
57  // If we have -mcpu=, use that.
58  if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
59    return A->getValue(Args);
60
61  llvm::StringRef MArch;
62  if (Arg *A = Args.getLastArg(options::OPT_march_EQ)) {
63    // Otherwise, if we have -march= choose the base CPU for that arch.
64    MArch = A->getValue(Args);
65  } else {
66    // Otherwise, use the Arch from the triple.
67    MArch = Triple.getArchName();
68  }
69
70  if (MArch == "armv2" || MArch == "armv2a")
71    return "arm2";
72  if (MArch == "armv3")
73    return "arm6";
74  if (MArch == "armv3m")
75    return "arm7m";
76  if (MArch == "armv4" || MArch == "armv4t")
77    return "arm7tdmi";
78  if (MArch == "armv5" || MArch == "armv5t")
79    return "arm10tdmi";
80  if (MArch == "armv5e" || MArch == "armv5te")
81    return "arm1026ejs";
82  if (MArch == "armv5tej")
83    return "arm926ej-s";
84  if (MArch == "armv6" || MArch == "armv6k")
85    return "arm1136jf-s";
86  if (MArch == "armv6j")
87    return "arm1136j-s";
88  if (MArch == "armv6z" || MArch == "armv6zk")
89    return "arm1176jzf-s";
90  if (MArch == "armv6t2")
91    return "arm1156t2-s";
92  if (MArch == "armv7" || MArch == "armv7a" || MArch == "armv7-a")
93    return "cortex-a8";
94  if (MArch == "armv7r" || MArch == "armv7-r")
95    return "cortex-r4";
96  if (MArch == "armv7m" || MArch == "armv7-m")
97    return "cortex-m3";
98  if (MArch == "ep9312")
99    return "ep9312";
100  if (MArch == "iwmmxt")
101    return "iwmmxt";
102  if (MArch == "xscale")
103    return "xscale";
104  if (MArch == "armv6m" || MArch == "armv6-m")
105    return "cortex-m0";
106
107  // If all else failed, return the most base CPU LLVM supports.
108  return "arm7tdmi";
109}
110
111/// getLLVMArchSuffixForARM - Get the LLVM arch name to use for a particular
112/// CPU.
113//
114// FIXME: This is redundant with -mcpu, why does LLVM use this.
115// FIXME: tblgen this, or kill it!
116static const char *getLLVMArchSuffixForARM(llvm::StringRef CPU) {
117  if (CPU == "arm7tdmi" || CPU == "arm7tdmi-s" || CPU == "arm710t" ||
118      CPU == "arm720t" || CPU == "arm9" || CPU == "arm9tdmi" ||
119      CPU == "arm920" || CPU == "arm920t" || CPU == "arm922t" ||
120      CPU == "arm940t" || CPU == "ep9312")
121    return "v4t";
122
123  if (CPU == "arm10tdmi" || CPU == "arm1020t")
124    return "v5";
125
126  if (CPU == "arm9e" || CPU == "arm926ej-s" || CPU == "arm946e-s" ||
127      CPU == "arm966e-s" || CPU == "arm968e-s" || CPU == "arm10e" ||
128      CPU == "arm1020e" || CPU == "arm1022e" || CPU == "xscale" ||
129      CPU == "iwmmxt")
130    return "v5e";
131
132  if (CPU == "arm1136j-s" || CPU == "arm1136jf-s" || CPU == "arm1176jz-s" ||
133      CPU == "arm1176jzf-s" || CPU == "mpcorenovfp" || CPU == "mpcore")
134    return "v6";
135
136  if (CPU == "arm1156t2-s" || CPU == "arm1156t2f-s")
137    return "v6t2";
138
139  if (CPU == "cortex-a8" || CPU == "cortex-a9")
140    return "v7";
141
142  if (CPU == "cortex-m3")
143    return "v7m";
144
145  if (CPU == "cortex-m0")
146    return "v6m";
147
148  return "";
149}
150
151std::string ToolChain::ComputeLLVMTriple(const ArgList &Args) const {
152  switch (getTriple().getArch()) {
153  default:
154    return getTripleString();
155
156  case llvm::Triple::arm:
157  case llvm::Triple::thumb: {
158    // FIXME: Factor into subclasses.
159    llvm::Triple Triple = getTriple();
160
161    // Thumb2 is the default for V7 on Darwin.
162    //
163    // FIXME: Thumb should just be another -target-feaure, not in the triple.
164    llvm::StringRef Suffix =
165      getLLVMArchSuffixForARM(getARMTargetCPU(Args, Triple));
166    bool ThumbDefault =
167      (Suffix == "v7" && getTriple().getOS() == llvm::Triple::Darwin);
168    std::string ArchName = "arm";
169    if (Args.hasFlag(options::OPT_mthumb, options::OPT_mno_thumb, ThumbDefault))
170      ArchName = "thumb";
171    Triple.setArchName(ArchName + Suffix.str());
172
173    return Triple.getTriple();
174  }
175  }
176}
177
178std::string ToolChain::ComputeEffectiveClangTriple(const ArgList &Args) const {
179  // Diagnose use of Darwin OS deployment target arguments on non-Darwin.
180  if (Arg *A = Args.getLastArg(options::OPT_mmacosx_version_min_EQ,
181                               options::OPT_miphoneos_version_min_EQ,
182                               options::OPT_mios_simulator_version_min_EQ))
183    getDriver().Diag(clang::diag::err_drv_clang_unsupported)
184      << A->getAsString(Args);
185
186  return ComputeLLVMTriple(Args);
187}
188
189ToolChain::CXXStdlibType ToolChain::GetCXXStdlibType(const ArgList &Args) const{
190  if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) {
191    llvm::StringRef Value = A->getValue(Args);
192    if (Value == "libc++")
193      return ToolChain::CST_Libcxx;
194    if (Value == "libstdc++")
195      return ToolChain::CST_Libstdcxx;
196    getDriver().Diag(clang::diag::err_drv_invalid_stdlib_name)
197      << A->getAsString(Args);
198  }
199
200  return ToolChain::CST_Libstdcxx;
201}
202
203void ToolChain::AddClangCXXStdlibIncludeArgs(const ArgList &Args,
204                                             ArgStringList &CmdArgs,
205                                             bool ObjCXXAutoRefCount) const {
206  CXXStdlibType Type = GetCXXStdlibType(Args);
207
208  switch (Type) {
209  case ToolChain::CST_Libcxx:
210    CmdArgs.push_back("-nostdinc++");
211    CmdArgs.push_back("-cxx-isystem");
212    CmdArgs.push_back("/usr/include/c++/v1");
213
214    if (ObjCXXAutoRefCount)
215      CmdArgs.push_back("-fobjc-arc-cxxlib=libc++");
216    break;
217
218  case ToolChain::CST_Libstdcxx:
219    // Currently handled by the mass of goop in InitHeaderSearch.
220
221    if (ObjCXXAutoRefCount)
222      CmdArgs.push_back("-fobjc-arc-cxxlib=libstdc++");
223    break;
224  }
225}
226
227void ToolChain::AddCXXStdlibLibArgs(const ArgList &Args,
228                                    ArgStringList &CmdArgs) const {
229  CXXStdlibType Type = GetCXXStdlibType(Args);
230
231  switch (Type) {
232  case ToolChain::CST_Libcxx:
233    CmdArgs.push_back("-lc++");
234    break;
235
236  case ToolChain::CST_Libstdcxx:
237    CmdArgs.push_back("-lstdc++");
238    break;
239  }
240}
241
242void ToolChain::AddCCKextLibArgs(const ArgList &Args,
243                                 ArgStringList &CmdArgs) const {
244  CmdArgs.push_back("-lcc_kext");
245}
246