ToolChain.cpp revision 0bb208c91e91e2fe91e0f487b00ff4b5b30c8cc2 
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 targetting.
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
105  // If all else failed, return the most base CPU LLVM supports.
106  return "arm7tdmi";
107}
108
109/// getLLVMArchSuffixForARM - Get the LLVM arch name to use for a particular
110/// CPU.
111//
112// FIXME: This is redundant with -mcpu, why does LLVM use this.
113// FIXME: tblgen this, or kill it!
114static const char *getLLVMArchSuffixForARM(llvm::StringRef CPU) {
115  if (CPU == "arm7tdmi" || CPU == "arm7tdmi-s" || CPU == "arm710t" ||
116      CPU == "arm720t" || CPU == "arm9" || CPU == "arm9tdmi" ||
117      CPU == "arm920" || CPU == "arm920t" || CPU == "arm922t" ||
118      CPU == "arm940t" || CPU == "ep9312")
119    return "v4t";
120
121  if (CPU == "arm10tdmi" || CPU == "arm1020t")
122    return "v5";
123
124  if (CPU == "arm9e" || CPU == "arm926ej-s" || CPU == "arm946e-s" ||
125      CPU == "arm966e-s" || CPU == "arm968e-s" || CPU == "arm10e" ||
126      CPU == "arm1020e" || CPU == "arm1022e" || CPU == "xscale" ||
127      CPU == "iwmmxt")
128    return "v5e";
129
130  if (CPU == "arm1136j-s" || CPU == "arm1136jf-s" || CPU == "arm1176jz-s" ||
131      CPU == "arm1176jzf-s" || CPU == "mpcorenovfp" || CPU == "mpcore")
132    return "v6";
133
134  if (CPU == "arm1156t2-s" || CPU == "arm1156t2f-s")
135    return "v6t2";
136
137  if (CPU == "cortex-a8" || CPU == "cortex-a9")
138    return "v7";
139
140  return "";
141}
142
143std::string ToolChain::ComputeLLVMTriple(const ArgList &Args) const {
144  switch (getTriple().getArch()) {
145  default:
146    return getTripleString();
147
148  case llvm::Triple::arm:
149  case llvm::Triple::thumb: {
150    // FIXME: Factor into subclasses.
151    llvm::Triple Triple = getTriple();
152
153    // Thumb2 is the default for V7 on Darwin.
154    //
155    // FIXME: Thumb should just be another -target-feaure, not in the triple.
156    llvm::StringRef Suffix =
157      getLLVMArchSuffixForARM(getARMTargetCPU(Args, Triple));
158    bool ThumbDefault =
159      (Suffix == "v7" && getTriple().getOS() == llvm::Triple::Darwin);
160    std::string ArchName = "arm";
161    if (Args.hasFlag(options::OPT_mthumb, options::OPT_mno_thumb, ThumbDefault))
162      ArchName = "thumb";
163    Triple.setArchName(ArchName + Suffix.str());
164
165    return Triple.getTriple();
166  }
167  }
168}
169
170std::string ToolChain::ComputeEffectiveClangTriple(const ArgList &Args) const {
171  // Diagnose use of -mmacosx-version-min and -miphoneos-version-min on
172  // non-Darwin.
173  if (Arg *A = Args.getLastArg(options::OPT_mmacosx_version_min_EQ,
174                               options::OPT_miphoneos_version_min_EQ))
175    getDriver().Diag(clang::diag::err_drv_clang_unsupported)
176      << A->getAsString(Args);
177
178  return ComputeLLVMTriple(Args);
179}
180
181ToolChain::CXXStdlibType ToolChain::GetCXXStdlibType(const ArgList &Args) const{
182  if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) {
183    llvm::StringRef Value = A->getValue(Args);
184    if (Value == "libc++")
185      return ToolChain::CST_Libcxx;
186    if (Value == "libstdc++")
187      return ToolChain::CST_Libstdcxx;
188    getDriver().Diag(clang::diag::err_drv_invalid_stdlib_name)
189      << A->getAsString(Args);
190  }
191
192  return ToolChain::CST_Libstdcxx;
193}
194
195void ToolChain::AddClangCXXStdlibIncludeArgs(const ArgList &Args,
196                                             ArgStringList &CmdArgs) const {
197  CXXStdlibType Type = GetCXXStdlibType(Args);
198
199  switch (Type) {
200  case ToolChain::CST_Libcxx:
201    CmdArgs.push_back("-nostdinc++");
202    CmdArgs.push_back("-cxx-isystem");
203    CmdArgs.push_back("/usr/include/c++/v1");
204    break;
205
206  case ToolChain::CST_Libstdcxx:
207    // Currently handled by the mass of goop in InitHeaderSearch.
208    break;
209  }
210}
211
212void ToolChain::AddCXXStdlibLibArgs(const ArgList &Args,
213                                    ArgStringList &CmdArgs) const {
214  CXXStdlibType Type = GetCXXStdlibType(Args);
215
216  switch (Type) {
217  case ToolChain::CST_Libcxx:
218    CmdArgs.push_back("-lc++");
219    break;
220
221  case ToolChain::CST_Libstdcxx:
222    CmdArgs.push_back("-lstdc++");
223    break;
224  }
225}
226
227void ToolChain::AddCCKextLibArgs(const ArgList &Args,
228                                 ArgStringList &CmdArgs) const {
229  CmdArgs.push_back("-lcc_kext");
230}
231