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"
21
22 using namespace clang::driver;
23
ToolChain(const HostInfo & _Host,const llvm::Triple & _Triple)24 ToolChain::ToolChain(const HostInfo &_Host, const llvm::Triple &_Triple)
25 : Host(_Host), Triple(_Triple) {
26 }
27
~ToolChain()28 ToolChain::~ToolChain() {
29 }
30
getDriver() const31 const Driver &ToolChain::getDriver() const {
32 return Host.getDriver();
33 }
34
GetFilePath(const char * Name) const35 std::string ToolChain::GetFilePath(const char *Name) const {
36 return Host.getDriver().GetFilePath(Name, *this);
37
38 }
39
GetProgramPath(const char * Name,bool WantFile) const40 std::string ToolChain::GetProgramPath(const char *Name, bool WantFile) const {
41 return Host.getDriver().GetProgramPath(Name, *this, WantFile);
42 }
43
LookupTypeForExtension(const char * Ext) const44 types::ID ToolChain::LookupTypeForExtension(const char *Ext) const {
45 return types::lookupTypeForExtension(Ext);
46 }
47
HasNativeLLVMSupport() const48 bool ToolChain::HasNativeLLVMSupport() const {
49 return false;
50 }
51
configureObjCRuntime(ObjCRuntime & runtime) const52 void 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.
getARMTargetCPU(const ArgList & Args,const llvm::Triple & Triple)74 static 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 llvm::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!
getLLVMArchSuffixForARM(llvm::StringRef CPU)137 static const char *getLLVMArchSuffixForARM(llvm::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
ComputeLLVMTriple(const ArgList & Args) const172 std::string ToolChain::ComputeLLVMTriple(const ArgList &Args) const {
173 switch (getTriple().getArch()) {
174 default:
175 return getTripleString();
176
177 case llvm::Triple::arm:
178 case llvm::Triple::thumb: {
179 // FIXME: Factor into subclasses.
180 llvm::Triple Triple = getTriple();
181
182 // Thumb2 is the default for V7 on Darwin.
183 //
184 // FIXME: Thumb should just be another -target-feaure, not in the triple.
185 llvm::StringRef Suffix =
186 getLLVMArchSuffixForARM(getARMTargetCPU(Args, Triple));
187 bool ThumbDefault =
188 (Suffix == "v7" && getTriple().getOS() == llvm::Triple::Darwin);
189 std::string ArchName = "arm";
190 if (Args.hasFlag(options::OPT_mthumb, options::OPT_mno_thumb, ThumbDefault))
191 ArchName = "thumb";
192 Triple.setArchName(ArchName + Suffix.str());
193
194 return Triple.getTriple();
195 }
196 }
197 }
198
ComputeEffectiveClangTriple(const ArgList & Args) const199 std::string ToolChain::ComputeEffectiveClangTriple(const ArgList &Args) const {
200 // Diagnose use of Darwin OS deployment target arguments on non-Darwin.
201 if (Arg *A = Args.getLastArg(options::OPT_mmacosx_version_min_EQ,
202 options::OPT_miphoneos_version_min_EQ,
203 options::OPT_mios_simulator_version_min_EQ))
204 getDriver().Diag(clang::diag::err_drv_clang_unsupported)
205 << A->getAsString(Args);
206
207 return ComputeLLVMTriple(Args);
208 }
209
GetCXXStdlibType(const ArgList & Args) const210 ToolChain::CXXStdlibType ToolChain::GetCXXStdlibType(const ArgList &Args) const{
211 if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) {
212 llvm::StringRef Value = A->getValue(Args);
213 if (Value == "libc++")
214 return ToolChain::CST_Libcxx;
215 if (Value == "libstdc++")
216 return ToolChain::CST_Libstdcxx;
217 getDriver().Diag(clang::diag::err_drv_invalid_stdlib_name)
218 << A->getAsString(Args);
219 }
220
221 return ToolChain::CST_Libstdcxx;
222 }
223
AddClangCXXStdlibIncludeArgs(const ArgList & Args,ArgStringList & CmdArgs,bool ObjCXXAutoRefCount) const224 void ToolChain::AddClangCXXStdlibIncludeArgs(const ArgList &Args,
225 ArgStringList &CmdArgs,
226 bool ObjCXXAutoRefCount) const {
227 CXXStdlibType Type = GetCXXStdlibType(Args);
228
229 // Header search paths are handled by the mass of goop in InitHeaderSearch.
230
231 switch (Type) {
232 case ToolChain::CST_Libcxx:
233 if (ObjCXXAutoRefCount)
234 CmdArgs.push_back("-fobjc-arc-cxxlib=libc++");
235 break;
236
237 case ToolChain::CST_Libstdcxx:
238 if (ObjCXXAutoRefCount)
239 CmdArgs.push_back("-fobjc-arc-cxxlib=libstdc++");
240 break;
241 }
242 }
243
AddCXXStdlibLibArgs(const ArgList & Args,ArgStringList & CmdArgs) const244 void ToolChain::AddCXXStdlibLibArgs(const ArgList &Args,
245 ArgStringList &CmdArgs) const {
246 CXXStdlibType Type = GetCXXStdlibType(Args);
247
248 switch (Type) {
249 case ToolChain::CST_Libcxx:
250 CmdArgs.push_back("-lc++");
251 break;
252
253 case ToolChain::CST_Libstdcxx:
254 CmdArgs.push_back("-lstdc++");
255 break;
256 }
257 }
258
AddCCKextLibArgs(const ArgList & Args,ArgStringList & CmdArgs) const259 void ToolChain::AddCCKextLibArgs(const ArgList &Args,
260 ArgStringList &CmdArgs) const {
261 CmdArgs.push_back("-lcc_kext");
262 }
263