clang  8.0.0
RISCVToolchain.cpp
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1 //===--- RISCVToolchain.cpp - RISCV 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 "RISCVToolchain.h"
11 #include "CommonArgs.h"
12 #include "InputInfo.h"
14 #include "clang/Driver/Options.h"
15 #include "llvm/Option/ArgList.h"
16 #include "llvm/Support/FileSystem.h"
17 #include "llvm/Support/Path.h"
18 #include "llvm/Support/raw_ostream.h"
19 
20 using namespace clang::driver;
21 using namespace clang::driver::toolchains;
22 using namespace clang::driver::tools;
23 using namespace clang;
24 using namespace llvm::opt;
25 
26 /// RISCV Toolchain
27 RISCVToolChain::RISCVToolChain(const Driver &D, const llvm::Triple &Triple,
28  const ArgList &Args)
29  : Generic_ELF(D, Triple, Args) {
30  GCCInstallation.init(Triple, Args);
31  getFilePaths().push_back(computeSysRoot() + "/lib");
32  if (GCCInstallation.isValid()) {
33  getFilePaths().push_back(GCCInstallation.getInstallPath().str());
34  getProgramPaths().push_back(
35  (GCCInstallation.getParentLibPath() + "/../bin").str());
36  }
37 }
38 
40  return new tools::RISCV::Linker(*this);
41 }
42 
44  const llvm::opt::ArgList &DriverArgs,
45  llvm::opt::ArgStringList &CC1Args,
46  Action::OffloadKind) const {
47  CC1Args.push_back("-nostdsysteminc");
48  CC1Args.push_back("-fuse-init-array");
49 }
50 
51 void RISCVToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
52  ArgStringList &CC1Args) const {
53  if (DriverArgs.hasArg(options::OPT_nostdinc))
54  return;
55 
56  if (!DriverArgs.hasArg(options::OPT_nostdlibinc)) {
57  SmallString<128> Dir(computeSysRoot());
58  llvm::sys::path::append(Dir, "include");
59  addSystemInclude(DriverArgs, CC1Args, Dir.str());
60  }
61 }
62 
64  const llvm::opt::ArgList &DriverArgs,
65  llvm::opt::ArgStringList &CC1Args) const {
66  const GCCVersion &Version = GCCInstallation.getVersion();
67  StringRef TripleStr = GCCInstallation.getTriple().str();
69  addLibStdCXXIncludePaths(computeSysRoot() + "/include/c++/" + Version.Text,
70  "", TripleStr, "", "", Multilib.includeSuffix(), DriverArgs, CC1Args);
71 }
72 
73 std::string RISCVToolChain::computeSysRoot() const {
74  if (!getDriver().SysRoot.empty())
75  return getDriver().SysRoot;
76 
77  if (!GCCInstallation.isValid())
78  return std::string();
79 
80  StringRef LibDir = GCCInstallation.getParentLibPath();
81  StringRef TripleStr = GCCInstallation.getTriple().str();
82  std::string SysRootDir = LibDir.str() + "/../" + TripleStr.str();
83 
84  if (!llvm::sys::fs::exists(SysRootDir))
85  return std::string();
86 
87  return SysRootDir;
88 }
89 
90 void RISCV::Linker::ConstructJob(Compilation &C, const JobAction &JA,
91  const InputInfo &Output,
92  const InputInfoList &Inputs,
93  const ArgList &Args,
94  const char *LinkingOutput) const {
95  const ToolChain &ToolChain = getToolChain();
96  const Driver &D = ToolChain.getDriver();
97  ArgStringList CmdArgs;
98 
99  if (!D.SysRoot.empty())
100  CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
101 
102  std::string Linker = getToolChain().GetProgramPath(getShortName());
103 
104  bool WantCRTs =
105  !Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles);
106 
107  if (WantCRTs) {
108  CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crt0.o")));
109  CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtbegin.o")));
110  }
111 
112  Args.AddAllArgs(CmdArgs, options::OPT_L);
113  ToolChain.AddFilePathLibArgs(Args, CmdArgs);
114  Args.AddAllArgs(CmdArgs,
115  {options::OPT_T_Group, options::OPT_e, options::OPT_s,
116  options::OPT_t, options::OPT_Z_Flag, options::OPT_r});
117 
118  AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
119 
120  // TODO: add C++ includes and libs if compiling C++.
121 
122  if (!Args.hasArg(options::OPT_nostdlib) &&
123  !Args.hasArg(options::OPT_nodefaultlibs)) {
124  if (ToolChain.ShouldLinkCXXStdlib(Args))
125  ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
126  CmdArgs.push_back("--start-group");
127  CmdArgs.push_back("-lc");
128  CmdArgs.push_back("-lgloss");
129  CmdArgs.push_back("--end-group");
130  CmdArgs.push_back("-lgcc");
131  }
132 
133  if (WantCRTs)
134  CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtend.o")));
135 
136  CmdArgs.push_back("-o");
137  CmdArgs.push_back(Output.getFilename());
138  C.addCommand(llvm::make_unique<Command>(JA, *this, Args.MakeArgString(Linker),
139  CmdArgs, Inputs));
140 }
141 // RISCV tools end.
const llvm::Triple & getTriple() const
Get the GCC triple for the detected install.
Definition: Gnu.h:220
Struct to store and manipulate GCC versions.
Definition: Gnu.h:157
const char * getFilename() const
Definition: InputInfo.h:84
GCCInstallationDetector GCCInstallation
Definition: Gnu.h:280
path_list & getProgramPaths()
Definition: ToolChain.h:227
const std::string & includeSuffix() const
Get the include directory suffix.
Definition: Multilib.h:67
void AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const override
Add the clang cc1 arguments for system include paths.
void addLibStdCxxIncludePaths(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const override
InputInfo - Wrapper for information about an input source.
Definition: InputInfo.h:23
std::string GetFilePath(const char *Name) const
Definition: ToolChain.cpp:431
path_list & getFilePaths()
Definition: ToolChain.h:224
Driver - Encapsulate logic for constructing compilation processes from a set of gcc-driver-like comma...
Definition: Driver.h:58
const GCCVersion & getVersion() const
Get the detected GCC version string.
Definition: Gnu.h:239
return Out str()
void addCommand(std::unique_ptr< Command > C)
Definition: Compilation.h:206
This corresponds to a single GCC Multilib, or a segment of one controlled by a command line flag...
Definition: Multilib.h:29
void AddFilePathLibArgs(const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const
AddFilePathLibArgs - Add each thing in getFilePaths() as a "-L" option.
Definition: ToolChain.cpp:778
void addClangTargetOptions(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args, Action::OffloadKind) const override
Add options that need to be passed to cc1 for this target.
const Driver & getDriver() const
Definition: ToolChain.h:186
static void addSystemInclude(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args, const Twine &Path)
Utility function to add a system include directory to CC1 arguments.
Definition: ToolChain.cpp:702
StringRef getParentLibPath() const
Get the detected GCC parent lib path.
Definition: Gnu.h:226
bool ShouldLinkCXXStdlib(const llvm::opt::ArgList &Args) const
Returns if the C++ standard library should be linked in.
Definition: ToolChain.cpp:755
Dataflow Directional Tag Classes.
void AddLinkerInputs(const ToolChain &TC, const InputInfoList &Inputs, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs, const JobAction &JA)
std::string SysRoot
sysroot, if present
Definition: Driver.h:148
Tool - Information on a specific compilation tool.
Definition: Tool.h:34
std::string Text
The unparsed text of the version.
Definition: Gnu.h:159
Compilation - A set of tasks to perform for a single driver invocation.
Definition: Compilation.h:46
RISCVToolChain(const Driver &D, const llvm::Triple &Triple, const llvm::opt::ArgList &Args)
RISCV Toolchain.
bool addLibStdCXXIncludePaths(Twine Base, Twine Suffix, StringRef GCCTriple, StringRef GCCMultiarchTriple, StringRef TargetMultiarchTriple, Twine IncludeSuffix, const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const
Helper to add the variant paths of a libstdc++ installation.
Definition: Gnu.cpp:2556
void init(const llvm::Triple &TargetTriple, const llvm::opt::ArgList &Args, ArrayRef< std::string > ExtraTripleAliases=None)
Initialize a GCCInstallationDetector from the driver.
Definition: Gnu.cpp:1702
StringRef getInstallPath() const
Get the detected GCC installation path.
Definition: Gnu.h:223
const Multilib & getMultilib() const
Get the detected Multilib.
Definition: Gnu.h:229
virtual void AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const
AddCXXStdlibLibArgs - Add the system specific linker arguments to use for the given C++ standard libr...
Definition: ToolChain.cpp:761
ToolChain - Access to tools for a single platform.
Definition: ToolChain.h:89
bool isValid() const
Check whether we detected a valid GCC install.
Definition: Gnu.h:217