1 //===--- Myriad.cpp - Myriad ToolChain Implementations ----------*- C++ -*-===//
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 "Myriad.h"
11 #include "CommonArgs.h"
12 #include "clang/Driver/Compilation.h"
13 #include "clang/Driver/Driver.h"
14 #include "clang/Driver/DriverDiagnostic.h"
15 #include "clang/Driver/Options.h"
16 #include "llvm/Option/ArgList.h"
17 
18 using namespace clang::driver;
19 using namespace clang::driver::toolchains;
20 using namespace clang;
21 using namespace llvm::opt;
22 
23 using tools::addPathIfExists;
24 
25 void tools::SHAVE::Compiler::ConstructJob(Compilation &C, const JobAction &JA,
26                                           const InputInfo &Output,
27                                           const InputInfoList &Inputs,
28                                           const ArgList &Args,
29                                           const char *LinkingOutput) const {
30   ArgStringList CmdArgs;
31   assert(Inputs.size() == 1);
32   const InputInfo &II = Inputs[0];
33   assert(II.getType() == types::TY_C || II.getType() == types::TY_CXX ||
34          II.getType() == types::TY_PP_CXX);
35 
36   if (JA.getKind() == Action::PreprocessJobClass) {
37     Args.ClaimAllArgs();
38     CmdArgs.push_back("-E");
39   } else {
40     assert(Output.getType() == types::TY_PP_Asm); // Require preprocessed asm.
41     CmdArgs.push_back("-S");
42     CmdArgs.push_back("-fno-exceptions"); // Always do this even if unspecified.
43   }
44   CmdArgs.push_back("-DMYRIAD2");
45 
46   // Append all -I, -iquote, -isystem paths, defines/undefines, 'f'
47   // flags, 'g' flags, 'M' flags, optimize flags, warning options,
48   // mcpu flags, mllvm flags, and Xclang flags.
49   // These are spelled the same way in clang and moviCompile.
50   Args.AddAllArgsExcept(
51       CmdArgs,
52       {options::OPT_I_Group, options::OPT_clang_i_Group, options::OPT_std_EQ,
53        options::OPT_D, options::OPT_U, options::OPT_f_Group,
54        options::OPT_f_clang_Group, options::OPT_g_Group, options::OPT_M_Group,
55        options::OPT_O_Group, options::OPT_W_Group, options::OPT_mcpu_EQ,
56        options::OPT_mllvm, options::OPT_Xclang},
57       {options::OPT_fno_split_dwarf_inlining});
58   Args.hasArg(options::OPT_fno_split_dwarf_inlining); // Claim it if present.
59 
60   // If we're producing a dependency file, and assembly is the final action,
61   // then the name of the target in the dependency file should be the '.o'
62   // file, not the '.s' file produced by this step. For example, instead of
63   //  /tmp/mumble.s: mumble.c .../someheader.h
64   // the filename on the lefthand side should be "mumble.o"
65   if (Args.getLastArg(options::OPT_MF) && !Args.getLastArg(options::OPT_MT) &&
66       C.getActions().size() == 1 &&
67       C.getActions()[0]->getKind() == Action::AssembleJobClass) {
68     Arg *A = Args.getLastArg(options::OPT_o);
69     if (A) {
70       CmdArgs.push_back("-MT");
71       CmdArgs.push_back(Args.MakeArgString(A->getValue()));
72     }
73   }
74 
75   CmdArgs.push_back(II.getFilename());
76   CmdArgs.push_back("-o");
77   CmdArgs.push_back(Output.getFilename());
78 
79   std::string Exec =
80       Args.MakeArgString(getToolChain().GetProgramPath("moviCompile"));
81   C.addCommand(llvm::make_unique<Command>(JA, *this, Args.MakeArgString(Exec),
82                                           CmdArgs, Inputs));
83 }
84 
85 void tools::SHAVE::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
86                                            const InputInfo &Output,
87                                            const InputInfoList &Inputs,
88                                            const ArgList &Args,
89                                            const char *LinkingOutput) const {
90   ArgStringList CmdArgs;
91 
92   assert(Inputs.size() == 1);
93   const InputInfo &II = Inputs[0];
94   assert(II.getType() == types::TY_PP_Asm); // Require preprocessed asm input.
95   assert(Output.getType() == types::TY_Object);
96 
97   CmdArgs.push_back("-no6thSlotCompression");
98   const Arg *CPUArg = Args.getLastArg(options::OPT_mcpu_EQ);
99   if (CPUArg)
100     CmdArgs.push_back(
101         Args.MakeArgString("-cv:" + StringRef(CPUArg->getValue())));
102   CmdArgs.push_back("-noSPrefixing");
103   CmdArgs.push_back("-a"); // Mystery option.
104   Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
105   for (const Arg *A : Args.filtered(options::OPT_I, options::OPT_isystem)) {
106     A->claim();
107     CmdArgs.push_back(
108         Args.MakeArgString(std::string("-i:") + A->getValue(0)));
109   }
110   CmdArgs.push_back(II.getFilename());
111   CmdArgs.push_back(
112       Args.MakeArgString(std::string("-o:") + Output.getFilename()));
113 
114   std::string Exec =
115       Args.MakeArgString(getToolChain().GetProgramPath("moviAsm"));
116   C.addCommand(llvm::make_unique<Command>(JA, *this, Args.MakeArgString(Exec),
117                                           CmdArgs, Inputs));
118 }
119 
120 void tools::Myriad::Linker::ConstructJob(Compilation &C, const JobAction &JA,
121                                          const InputInfo &Output,
122                                          const InputInfoList &Inputs,
123                                          const ArgList &Args,
124                                          const char *LinkingOutput) const {
125   const auto &TC =
126       static_cast<const toolchains::MyriadToolChain &>(getToolChain());
127   const llvm::Triple &T = TC.getTriple();
128   ArgStringList CmdArgs;
129   bool UseStartfiles =
130       !Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles);
131   bool UseDefaultLibs =
132       !Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs);
133   // Silence warning if the args contain both -nostdlib and -stdlib=.
134   Args.getLastArg(options::OPT_stdlib_EQ);
135 
136   if (T.getArch() == llvm::Triple::sparc)
137     CmdArgs.push_back("-EB");
138   else // SHAVE assumes little-endian, and sparcel is expressly so.
139     CmdArgs.push_back("-EL");
140 
141   // The remaining logic is mostly like gnutools::Linker::ConstructJob,
142   // but we never pass through a --sysroot option and various other bits.
143   // For example, there are no sanitizers (yet) nor gold linker.
144 
145   // Eat some arguments that may be present but have no effect.
146   Args.ClaimAllArgs(options::OPT_g_Group);
147   Args.ClaimAllArgs(options::OPT_w);
148   Args.ClaimAllArgs(options::OPT_static_libgcc);
149 
150   if (Args.hasArg(options::OPT_s)) // Pass the 'strip' option.
151     CmdArgs.push_back("-s");
152 
153   CmdArgs.push_back("-o");
154   CmdArgs.push_back(Output.getFilename());
155 
156   if (UseStartfiles) {
157     // If you want startfiles, it means you want the builtin crti and crtbegin,
158     // but not crt0. Myriad link commands provide their own crt0.o as needed.
159     CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crti.o")));
160     CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crtbegin.o")));
161   }
162 
163   Args.AddAllArgs(CmdArgs, {options::OPT_L, options::OPT_T_Group,
164                             options::OPT_e, options::OPT_s, options::OPT_t,
165                             options::OPT_Z_Flag, options::OPT_r});
166 
167   TC.AddFilePathLibArgs(Args, CmdArgs);
168 
169   bool NeedsSanitizerDeps = addSanitizerRuntimes(TC, Args, CmdArgs);
170   AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs, JA);
171 
172   if (UseDefaultLibs) {
173     if (NeedsSanitizerDeps)
174       linkSanitizerRuntimeDeps(TC, CmdArgs);
175     if (C.getDriver().CCCIsCXX()) {
176       if (TC.GetCXXStdlibType(Args) == ToolChain::CST_Libcxx) {
177         CmdArgs.push_back("-lc++");
178         CmdArgs.push_back("-lc++abi");
179       } else
180         CmdArgs.push_back("-lstdc++");
181     }
182     if (T.getOS() == llvm::Triple::RTEMS) {
183       CmdArgs.push_back("--start-group");
184       CmdArgs.push_back("-lc");
185       CmdArgs.push_back("-lgcc"); // circularly dependent on rtems
186       // You must provide your own "-L" option to enable finding these.
187       CmdArgs.push_back("-lrtemscpu");
188       CmdArgs.push_back("-lrtemsbsp");
189       CmdArgs.push_back("--end-group");
190     } else {
191       CmdArgs.push_back("-lc");
192       CmdArgs.push_back("-lgcc");
193     }
194   }
195   if (UseStartfiles) {
196     CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crtend.o")));
197     CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crtn.o")));
198   }
199 
200   std::string Exec =
201       Args.MakeArgString(TC.GetProgramPath("sparc-myriad-rtems-ld"));
202   C.addCommand(llvm::make_unique<Command>(JA, *this, Args.MakeArgString(Exec),
203                                           CmdArgs, Inputs));
204 }
205 
206 MyriadToolChain::MyriadToolChain(const Driver &D, const llvm::Triple &Triple,
207                                  const ArgList &Args)
208     : Generic_ELF(D, Triple, Args) {
209   // If a target of 'sparc-myriad-elf' is specified to clang, it wants to use
210   // 'sparc-myriad--elf' (note the unknown OS) as the canonical triple.
211   // This won't work to find gcc. Instead we give the installation detector an
212   // extra triple, which is preferable to further hacks of the logic that at
213   // present is based solely on getArch(). In particular, it would be wrong to
214   // choose the myriad installation when targeting a non-myriad sparc install.
215   switch (Triple.getArch()) {
216   default:
217     D.Diag(clang::diag::err_target_unsupported_arch)
218         << Triple.getArchName() << "myriad";
219     LLVM_FALLTHROUGH;
220   case llvm::Triple::shave:
221     return;
222   case llvm::Triple::sparc:
223   case llvm::Triple::sparcel:
224     GCCInstallation.init(Triple, Args, {"sparc-myriad-rtems"});
225   }
226 
227   if (GCCInstallation.isValid()) {
228     // This directory contains crt{i,n,begin,end}.o as well as libgcc.
229     // These files are tied to a particular version of gcc.
230     SmallString<128> CompilerSupportDir(GCCInstallation.getInstallPath());
231     addPathIfExists(D, CompilerSupportDir, getFilePaths());
232   }
233   // libstd++ and libc++ must both be found in this one place.
234   addPathIfExists(D, D.Dir + "/../sparc-myriad-rtems/lib", getFilePaths());
235 }
236 
237 MyriadToolChain::~MyriadToolChain() {}
238 
239 void MyriadToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
240                                                 ArgStringList &CC1Args) const {
241   if (!DriverArgs.hasArg(clang::driver::options::OPT_nostdinc))
242     addSystemInclude(DriverArgs, CC1Args, getDriver().SysRoot + "/include");
243 }
244 
245 void MyriadToolChain::addLibCxxIncludePaths(
246     const llvm::opt::ArgList &DriverArgs,
247     llvm::opt::ArgStringList &CC1Args) const {
248   std::string Path(getDriver().getInstalledDir());
249   addSystemInclude(DriverArgs, CC1Args, Path + "/../include/c++/v1");
250 }
251 
252 void MyriadToolChain::addLibStdCxxIncludePaths(
253     const llvm::opt::ArgList &DriverArgs,
254     llvm::opt::ArgStringList &CC1Args) const {
255   StringRef LibDir = GCCInstallation.getParentLibPath();
256   const GCCVersion &Version = GCCInstallation.getVersion();
257   StringRef TripleStr = GCCInstallation.getTriple().str();
258   const Multilib &Multilib = GCCInstallation.getMultilib();
259   addLibStdCXXIncludePaths(
260       LibDir.str() + "/../" + TripleStr.str() + "/include/c++/" + Version.Text,
261       "", TripleStr, "", "", Multilib.includeSuffix(), DriverArgs, CC1Args);
262 }
263 
264 // MyriadToolChain handles several triples:
265 //  {shave,sparc{,el}}-myriad-{rtems,unknown}-elf
266 Tool *MyriadToolChain::SelectTool(const JobAction &JA) const {
267   // The inherited method works fine if not targeting the SHAVE.
268   if (!isShaveCompilation(getTriple()))
269     return ToolChain::SelectTool(JA);
270   switch (JA.getKind()) {
271   case Action::PreprocessJobClass:
272   case Action::CompileJobClass:
273     if (!Compiler)
274       Compiler.reset(new tools::SHAVE::Compiler(*this));
275     return Compiler.get();
276   case Action::AssembleJobClass:
277     if (!Assembler)
278       Assembler.reset(new tools::SHAVE::Assembler(*this));
279     return Assembler.get();
280   default:
281     return ToolChain::getTool(JA.getKind());
282   }
283 }
284 
285 Tool *MyriadToolChain::buildLinker() const {
286   return new tools::Myriad::Linker(*this);
287 }
288 
289 SanitizerMask MyriadToolChain::getSupportedSanitizers() const {
290   return SanitizerKind::Address;
291 }
292