Myriad.cpp revision 360784 
1//===--- Myriad.cpp - Myriad ToolChain Implementations ----------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "Myriad.h"
10#include "CommonArgs.h"
11#include "clang/Driver/Compilation.h"
12#include "clang/Driver/Driver.h"
13#include "clang/Driver/DriverDiagnostic.h"
14#include "clang/Driver/Options.h"
15#include "llvm/Option/ArgList.h"
16
17using namespace clang::driver;
18using namespace clang::driver::toolchains;
19using namespace clang;
20using namespace llvm::opt;
21
22using tools::addPathIfExists;
23
24void tools::SHAVE::Compiler::ConstructJob(Compilation &C, const JobAction &JA,
25                                          const InputInfo &Output,
26                                          const InputInfoList &Inputs,
27                                          const ArgList &Args,
28                                          const char *LinkingOutput) const {
29  ArgStringList CmdArgs;
30  assert(Inputs.size() == 1);
31  const InputInfo &II = Inputs[0];
32  assert(II.getType() == types::TY_C || II.getType() == types::TY_CXX ||
33         II.getType() == types::TY_PP_CXX);
34
35  if (JA.getKind() == Action::PreprocessJobClass) {
36    Args.ClaimAllArgs();
37    CmdArgs.push_back("-E");
38  } else {
39    assert(Output.getType() == types::TY_PP_Asm); // Require preprocessed asm.
40    CmdArgs.push_back("-S");
41    CmdArgs.push_back("-fno-exceptions"); // Always do this even if unspecified.
42  }
43  CmdArgs.push_back("-DMYRIAD2");
44
45  // Append all -I, -iquote, -isystem paths, defines/undefines, 'f'
46  // flags, 'g' flags, 'M' flags, optimize flags, warning options,
47  // mcpu flags, mllvm flags, and Xclang flags.
48  // These are spelled the same way in clang and moviCompile.
49  Args.AddAllArgsExcept(
50      CmdArgs,
51      {options::OPT_I_Group, options::OPT_clang_i_Group, options::OPT_std_EQ,
52       options::OPT_D, options::OPT_U, options::OPT_f_Group,
53       options::OPT_f_clang_Group, options::OPT_g_Group, options::OPT_M_Group,
54       options::OPT_O_Group, options::OPT_W_Group, options::OPT_mcpu_EQ,
55       options::OPT_mllvm, options::OPT_Xclang},
56      {options::OPT_fno_split_dwarf_inlining});
57  Args.hasArg(options::OPT_fno_split_dwarf_inlining); // Claim it if present.
58
59  // If we're producing a dependency file, and assembly is the final action,
60  // then the name of the target in the dependency file should be the '.o'
61  // file, not the '.s' file produced by this step. For example, instead of
62  //  /tmp/mumble.s: mumble.c .../someheader.h
63  // the filename on the lefthand side should be "mumble.o"
64  if (Args.getLastArg(options::OPT_MF) && !Args.getLastArg(options::OPT_MT) &&
65      C.getActions().size() == 1 &&
66      C.getActions()[0]->getKind() == Action::AssembleJobClass) {
67    Arg *A = Args.getLastArg(options::OPT_o);
68    if (A) {
69      CmdArgs.push_back("-MT");
70      CmdArgs.push_back(Args.MakeArgString(A->getValue()));
71    }
72  }
73
74  CmdArgs.push_back(II.getFilename());
75  CmdArgs.push_back("-o");
76  CmdArgs.push_back(Output.getFilename());
77
78  std::string Exec =
79      Args.MakeArgString(getToolChain().GetProgramPath("moviCompile"));
80  C.addCommand(std::make_unique<Command>(JA, *this, Args.MakeArgString(Exec),
81                                          CmdArgs, Inputs));
82}
83
84void tools::SHAVE::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
85                                           const InputInfo &Output,
86                                           const InputInfoList &Inputs,
87                                           const ArgList &Args,
88                                           const char *LinkingOutput) const {
89  ArgStringList CmdArgs;
90
91  assert(Inputs.size() == 1);
92  const InputInfo &II = Inputs[0];
93  assert(II.getType() == types::TY_PP_Asm); // Require preprocessed asm input.
94  assert(Output.getType() == types::TY_Object);
95
96  CmdArgs.push_back("-no6thSlotCompression");
97  const Arg *CPUArg = Args.getLastArg(options::OPT_mcpu_EQ);
98  if (CPUArg)
99    CmdArgs.push_back(
100        Args.MakeArgString("-cv:" + StringRef(CPUArg->getValue())));
101  CmdArgs.push_back("-noSPrefixing");
102  CmdArgs.push_back("-a"); // Mystery option.
103  Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
104  for (const Arg *A : Args.filtered(options::OPT_I, options::OPT_isystem)) {
105    A->claim();
106    CmdArgs.push_back(
107        Args.MakeArgString(std::string("-i:") + A->getValue(0)));
108  }
109  CmdArgs.push_back(II.getFilename());
110  CmdArgs.push_back(
111      Args.MakeArgString(std::string("-o:") + Output.getFilename()));
112
113  std::string Exec =
114      Args.MakeArgString(getToolChain().GetProgramPath("moviAsm"));
115  C.addCommand(std::make_unique<Command>(JA, *this, Args.MakeArgString(Exec),
116                                          CmdArgs, Inputs));
117}
118
119void tools::Myriad::Linker::ConstructJob(Compilation &C, const JobAction &JA,
120                                         const InputInfo &Output,
121                                         const InputInfoList &Inputs,
122                                         const ArgList &Args,
123                                         const char *LinkingOutput) const {
124  const auto &TC =
125      static_cast<const toolchains::MyriadToolChain &>(getToolChain());
126  const llvm::Triple &T = TC.getTriple();
127  ArgStringList CmdArgs;
128  bool UseStartfiles =
129      !Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles);
130  bool UseDefaultLibs =
131      !Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs);
132  // Silence warning if the args contain both -nostdlib and -stdlib=.
133  Args.getLastArg(options::OPT_stdlib_EQ);
134
135  if (T.getArch() == llvm::Triple::sparc)
136    CmdArgs.push_back("-EB");
137  else // SHAVE assumes little-endian, and sparcel is expressly so.
138    CmdArgs.push_back("-EL");
139
140  // The remaining logic is mostly like gnutools::Linker::ConstructJob,
141  // but we never pass through a --sysroot option and various other bits.
142  // For example, there are no sanitizers (yet) nor gold linker.
143
144  // Eat some arguments that may be present but have no effect.
145  Args.ClaimAllArgs(options::OPT_g_Group);
146  Args.ClaimAllArgs(options::OPT_w);
147  Args.ClaimAllArgs(options::OPT_static_libgcc);
148
149  if (Args.hasArg(options::OPT_s)) // Pass the 'strip' option.
150    CmdArgs.push_back("-s");
151
152  CmdArgs.push_back("-o");
153  CmdArgs.push_back(Output.getFilename());
154
155  if (UseStartfiles) {
156    // If you want startfiles, it means you want the builtin crti and crtbegin,
157    // but not crt0. Myriad link commands provide their own crt0.o as needed.
158    CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crti.o")));
159    CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crtbegin.o")));
160  }
161
162  Args.AddAllArgs(CmdArgs, {options::OPT_L, options::OPT_T_Group,
163                            options::OPT_e, options::OPT_s, options::OPT_t,
164                            options::OPT_Z_Flag, options::OPT_r});
165
166  TC.AddFilePathLibArgs(Args, CmdArgs);
167
168  bool NeedsSanitizerDeps = addSanitizerRuntimes(TC, Args, CmdArgs);
169  AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs, JA);
170
171  if (UseDefaultLibs) {
172    if (NeedsSanitizerDeps)
173      linkSanitizerRuntimeDeps(TC, CmdArgs);
174    if (C.getDriver().CCCIsCXX()) {
175      if (TC.GetCXXStdlibType(Args) == ToolChain::CST_Libcxx) {
176        CmdArgs.push_back("-lc++");
177        CmdArgs.push_back("-lc++abi");
178      } else
179        CmdArgs.push_back("-lstdc++");
180    }
181    if (T.getOS() == llvm::Triple::RTEMS) {
182      CmdArgs.push_back("--start-group");
183      CmdArgs.push_back("-lc");
184      CmdArgs.push_back("-lgcc"); // circularly dependent on rtems
185      // You must provide your own "-L" option to enable finding these.
186      CmdArgs.push_back("-lrtemscpu");
187      CmdArgs.push_back("-lrtemsbsp");
188      CmdArgs.push_back("--end-group");
189    } else {
190      CmdArgs.push_back("-lc");
191      CmdArgs.push_back("-lgcc");
192    }
193  }
194  if (UseStartfiles) {
195    CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crtend.o")));
196    CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crtn.o")));
197  }
198
199  std::string Exec =
200      Args.MakeArgString(TC.GetProgramPath("sparc-myriad-rtems-ld"));
201  C.addCommand(std::make_unique<Command>(JA, *this, Args.MakeArgString(Exec),
202                                          CmdArgs, Inputs));
203}
204
205MyriadToolChain::MyriadToolChain(const Driver &D, const llvm::Triple &Triple,
206                                 const ArgList &Args)
207    : Generic_ELF(D, Triple, Args) {
208  // If a target of 'sparc-myriad-elf' is specified to clang, it wants to use
209  // 'sparc-myriad--elf' (note the unknown OS) as the canonical triple.
210  // This won't work to find gcc. Instead we give the installation detector an
211  // extra triple, which is preferable to further hacks of the logic that at
212  // present is based solely on getArch(). In particular, it would be wrong to
213  // choose the myriad installation when targeting a non-myriad sparc install.
214  switch (Triple.getArch()) {
215  default:
216    D.Diag(clang::diag::err_target_unsupported_arch)
217        << Triple.getArchName() << "myriad";
218    LLVM_FALLTHROUGH;
219  case llvm::Triple::shave:
220    return;
221  case llvm::Triple::sparc:
222  case llvm::Triple::sparcel:
223    GCCInstallation.init(Triple, Args, {"sparc-myriad-rtems"});
224  }
225
226  if (GCCInstallation.isValid()) {
227    // This directory contains crt{i,n,begin,end}.o as well as libgcc.
228    // These files are tied to a particular version of gcc.
229    SmallString<128> CompilerSupportDir(GCCInstallation.getInstallPath());
230    addPathIfExists(D, CompilerSupportDir, getFilePaths());
231  }
232  // libstd++ and libc++ must both be found in this one place.
233  addPathIfExists(D, D.Dir + "/../sparc-myriad-rtems/lib", getFilePaths());
234}
235
236MyriadToolChain::~MyriadToolChain() {}
237
238void MyriadToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
239                                                ArgStringList &CC1Args) const {
240  if (!DriverArgs.hasArg(clang::driver::options::OPT_nostdinc))
241    addSystemInclude(DriverArgs, CC1Args, getDriver().SysRoot + "/include");
242}
243
244void MyriadToolChain::addLibCxxIncludePaths(
245    const llvm::opt::ArgList &DriverArgs,
246    llvm::opt::ArgStringList &CC1Args) const {
247  std::string Path(getDriver().getInstalledDir());
248  addSystemInclude(DriverArgs, CC1Args, Path + "/../include/c++/v1");
249}
250
251void MyriadToolChain::addLibStdCxxIncludePaths(
252    const llvm::opt::ArgList &DriverArgs,
253    llvm::opt::ArgStringList &CC1Args) const {
254  StringRef LibDir = GCCInstallation.getParentLibPath();
255  const GCCVersion &Version = GCCInstallation.getVersion();
256  StringRef TripleStr = GCCInstallation.getTriple().str();
257  const Multilib &Multilib = GCCInstallation.getMultilib();
258  addLibStdCXXIncludePaths(
259      LibDir.str() + "/../" + TripleStr.str() + "/include/c++/" + Version.Text,
260      "", TripleStr, "", "", Multilib.includeSuffix(), DriverArgs, CC1Args);
261}
262
263// MyriadToolChain handles several triples:
264//  {shave,sparc{,el}}-myriad-{rtems,unknown}-elf
265Tool *MyriadToolChain::SelectTool(const JobAction &JA) const {
266  // The inherited method works fine if not targeting the SHAVE.
267  if (!isShaveCompilation(getTriple()))
268    return ToolChain::SelectTool(JA);
269  switch (JA.getKind()) {
270  case Action::PreprocessJobClass:
271  case Action::CompileJobClass:
272    if (!Compiler)
273      Compiler.reset(new tools::SHAVE::Compiler(*this));
274    return Compiler.get();
275  case Action::AssembleJobClass:
276    if (!Assembler)
277      Assembler.reset(new tools::SHAVE::Assembler(*this));
278    return Assembler.get();
279  default:
280    return ToolChain::getTool(JA.getKind());
281  }
282}
283
284Tool *MyriadToolChain::buildLinker() const {
285  return new tools::Myriad::Linker(*this);
286}
287
288SanitizerMask MyriadToolChain::getSupportedSanitizers() const {
289  return SanitizerKind::Address;
290}
291