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 
20 using namespace clang::driver;
21 
22 ToolChain::ToolChain(const HostInfo &_Host, const llvm::Triple &_Triple)
23   : Host(_Host), Triple(_Triple) {
24 }
25 
26 ToolChain::~ToolChain() {
27 }
28 
29 const Driver &ToolChain::getDriver() const {
30  return Host.getDriver();
31 }
32 
33 std::string ToolChain::GetFilePath(const char *Name) const {
34   return Host.getDriver().GetFilePath(Name, *this);
35 
36 }
37 
38 std::string ToolChain::GetProgramPath(const char *Name, bool WantFile) const {
39   return Host.getDriver().GetProgramPath(Name, *this, WantFile);
40 }
41 
42 types::ID ToolChain::LookupTypeForExtension(const char *Ext) const {
43   return types::lookupTypeForExtension(Ext);
44 }
45 
46 bool 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.
53 static 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!
116 static 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 
151 std::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 
178 std::string ToolChain::ComputeEffectiveClangTriple(const ArgList &Args) const {
179   // Diagnose use of -mmacosx-version-min and -miphoneos-version-min on
180   // non-Darwin.
181   if (Arg *A = Args.getLastArg(options::OPT_mmacosx_version_min_EQ,
182                                options::OPT_miphoneos_version_min_EQ))
183     getDriver().Diag(clang::diag::err_drv_clang_unsupported)
184       << A->getAsString(Args);
185 
186   return ComputeLLVMTriple(Args);
187 }
188 
189 ToolChain::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 
203 void ToolChain::AddClangCXXStdlibIncludeArgs(const ArgList &Args,
204                                              ArgStringList &CmdArgs) const {
205   CXXStdlibType Type = GetCXXStdlibType(Args);
206 
207   switch (Type) {
208   case ToolChain::CST_Libcxx:
209     CmdArgs.push_back("-nostdinc++");
210     CmdArgs.push_back("-cxx-isystem");
211     CmdArgs.push_back("/usr/include/c++/v1");
212     break;
213 
214   case ToolChain::CST_Libstdcxx:
215     // Currently handled by the mass of goop in InitHeaderSearch.
216     break;
217   }
218 }
219 
220 void ToolChain::AddCXXStdlibLibArgs(const ArgList &Args,
221                                     ArgStringList &CmdArgs) const {
222   CXXStdlibType Type = GetCXXStdlibType(Args);
223 
224   switch (Type) {
225   case ToolChain::CST_Libcxx:
226     CmdArgs.push_back("-lc++");
227     break;
228 
229   case ToolChain::CST_Libstdcxx:
230     CmdArgs.push_back("-lstdc++");
231     break;
232   }
233 }
234 
235 void ToolChain::AddCCKextLibArgs(const ArgList &Args,
236                                  ArgStringList &CmdArgs) const {
237   CmdArgs.push_back("-lcc_kext");
238 }
239