ToolChain.cpp revision 1fed452f1e5486e1c3e6204fb5e284189b19ea7f 
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
46/// getARMTargetCPU - Get the (LLVM) name of the ARM cpu we are targetting.
47//
48// FIXME: tblgen this.
49static const char *getARMTargetCPU(const ArgList &Args,
50                                   const llvm::Triple &Triple) {
51  // FIXME: Warn on inconsistent use of -mcpu and -march.
52
53  // If we have -mcpu=, use that.
54  if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
55    return A->getValue(Args);
56
57  llvm::StringRef MArch;
58  if (Arg *A = Args.getLastArg(options::OPT_march_EQ)) {
59    // Otherwise, if we have -march= choose the base CPU for that arch.
60    MArch = A->getValue(Args);
61  } else {
62    // Otherwise, use the Arch from the triple.
63    MArch = Triple.getArchName();
64  }
65
66  if (MArch == "armv2" || MArch == "armv2a")
67    return "arm2";
68  if (MArch == "armv3")
69    return "arm6";
70  if (MArch == "armv3m")
71    return "arm7m";
72  if (MArch == "armv4" || MArch == "armv4t")
73    return "arm7tdmi";
74  if (MArch == "armv5" || MArch == "armv5t")
75    return "arm10tdmi";
76  if (MArch == "armv5e" || MArch == "armv5te")
77    return "arm1026ejs";
78  if (MArch == "armv5tej")
79    return "arm926ej-s";
80  if (MArch == "armv6" || MArch == "armv6k")
81    return "arm1136jf-s";
82  if (MArch == "armv6j")
83    return "arm1136j-s";
84  if (MArch == "armv6z" || MArch == "armv6zk")
85    return "arm1176jzf-s";
86  if (MArch == "armv6t2")
87    return "arm1156t2-s";
88  if (MArch == "armv7" || MArch == "armv7a" || MArch == "armv7-a")
89    return "cortex-a8";
90  if (MArch == "armv7r" || MArch == "armv7-r")
91    return "cortex-r4";
92  if (MArch == "armv7m" || MArch == "armv7-m")
93    return "cortex-m3";
94  if (MArch == "ep9312")
95    return "ep9312";
96  if (MArch == "iwmmxt")
97    return "iwmmxt";
98  if (MArch == "xscale")
99    return "xscale";
100
101  // If all else failed, return the most base CPU LLVM supports.
102  return "arm7tdmi";
103}
104
105/// getLLVMArchSuffixForARM - Get the LLVM arch name to use for a particular
106/// CPU.
107//
108// FIXME: This is redundant with -mcpu, why does LLVM use this.
109// FIXME: tblgen this, or kill it!
110static const char *getLLVMArchSuffixForARM(llvm::StringRef CPU) {
111  if (CPU == "arm7tdmi" || CPU == "arm7tdmi-s" || CPU == "arm710t" ||
112      CPU == "arm720t" || CPU == "arm9" || CPU == "arm9tdmi" ||
113      CPU == "arm920" || CPU == "arm920t" || CPU == "arm922t" ||
114      CPU == "arm940t" || CPU == "ep9312")
115    return "v4t";
116
117  if (CPU == "arm10tdmi" || CPU == "arm1020t")
118    return "v5";
119
120  if (CPU == "arm9e" || CPU == "arm926ej-s" || CPU == "arm946e-s" ||
121      CPU == "arm966e-s" || CPU == "arm968e-s" || CPU == "arm10e" ||
122      CPU == "arm1020e" || CPU == "arm1022e" || CPU == "xscale" ||
123      CPU == "iwmmxt")
124    return "v5e";
125
126  if (CPU == "arm1136j-s" || CPU == "arm1136jf-s" || CPU == "arm1176jz-s" ||
127      CPU == "arm1176jzf-s" || CPU == "mpcorenovfp" || CPU == "mpcore")
128    return "v6";
129
130  if (CPU == "arm1156t2-s" || CPU == "arm1156t2f-s")
131    return "v6t2";
132
133  if (CPU == "cortex-a8" || CPU == "cortex-a9")
134    return "v7";
135
136  return "";
137}
138
139std::string ToolChain::ComputeLLVMTriple(const ArgList &Args) const {
140  switch (getTriple().getArch()) {
141  default:
142    return getTripleString();
143
144  case llvm::Triple::arm:
145  case llvm::Triple::thumb: {
146    // FIXME: Factor into subclasses.
147    llvm::Triple Triple = getTriple();
148
149    // Thumb2 is the default for V7 on Darwin.
150    //
151    // FIXME: Thumb should just be another -target-feaure, not in the triple.
152    llvm::StringRef Suffix =
153      getLLVMArchSuffixForARM(getARMTargetCPU(Args, Triple));
154    bool ThumbDefault =
155      (Suffix == "v7" && getTriple().getOS() == llvm::Triple::Darwin);
156    std::string ArchName = "arm";
157    if (Args.hasFlag(options::OPT_mthumb, options::OPT_mno_thumb, ThumbDefault))
158      ArchName = "thumb";
159    Triple.setArchName(ArchName + Suffix.str());
160
161    return Triple.getTriple();
162  }
163  }
164}
165
166std::string ToolChain::ComputeEffectiveClangTriple(const ArgList &Args) const {
167  // Diagnose use of -mmacosx-version-min and -miphoneos-version-min on
168  // non-Darwin.
169  if (Arg *A = Args.getLastArg(options::OPT_mmacosx_version_min_EQ,
170                               options::OPT_miphoneos_version_min_EQ))
171    getDriver().Diag(clang::diag::err_drv_clang_unsupported)
172      << A->getAsString(Args);
173
174  return ComputeLLVMTriple(Args);
175}
176
177ToolChain::CXXStdlibType ToolChain::GetCXXStdlibType(const ArgList &Args) const{
178  if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) {
179    llvm::StringRef Value = A->getValue(Args);
180    if (Value == "libc++")
181      return ToolChain::CST_Libcxx;
182    if (Value == "libstdc++")
183      return ToolChain::CST_Libstdcxx;
184    getDriver().Diag(clang::diag::err_drv_invalid_stdlib_name)
185      << A->getAsString(Args);
186  }
187
188  return ToolChain::CST_Libstdcxx;
189}
190
191void ToolChain::AddClangCXXStdlibIncludeArgs(const ArgList &Args,
192                                             ArgStringList &CmdArgs) const {
193  CXXStdlibType Type = GetCXXStdlibType(Args);
194
195  switch (Type) {
196  case ToolChain::CST_Libcxx:
197    CmdArgs.push_back("-cxx-system-include");
198    CmdArgs.push_back("/usr/include/c++/v1");
199    break;
200
201  case ToolChain::CST_Libstdcxx:
202    // Currently handled by the mass of goop in InitHeaderSearch.
203    break;
204  }
205}
206
207void ToolChain::AddClangCXXStdlibLibArgs(const ArgList &Args,
208                                         ArgStringList &CmdArgs) const {
209  CXXStdlibType Type = GetCXXStdlibType(Args);
210
211  switch (Type) {
212  case ToolChain::CST_Libcxx:
213    CmdArgs.push_back("-lc++");
214    break;
215
216  case ToolChain::CST_Libstdcxx:
217    CmdArgs.push_back("-lstdc++");
218    break;
219  }
220}
221