clang  7.0.0
RISCV.cpp
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1 //===--- RISCV.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 "RISCV.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/Path.h"
17 #include "llvm/Support/raw_ostream.h"
18 
19 using namespace clang::driver;
20 using namespace clang::driver::toolchains;
21 using namespace clang::driver::tools;
22 using namespace clang;
23 using namespace llvm::opt;
24 
25 /// RISCV Toolchain
26 RISCVToolChain::RISCVToolChain(const Driver &D, const llvm::Triple &Triple,
27  const ArgList &Args)
28  : Generic_ELF(D, Triple, Args) {
29  GCCInstallation.init(Triple, Args);
30  getFilePaths().push_back(D.SysRoot + "/lib");
31  if (GCCInstallation.isValid()) {
32  getFilePaths().push_back(GCCInstallation.getInstallPath().str());
33  getProgramPaths().push_back(
34  (GCCInstallation.getParentLibPath() + "/../bin").str());
35  }
36 }
37 
39  return new tools::RISCV::Linker(*this);
40 }
41 
42 void RISCVToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
43  ArgStringList &CC1Args) const {
44  if (DriverArgs.hasArg(options::OPT_nostdinc))
45  return;
46 
47  if (!DriverArgs.hasArg(options::OPT_nostdlibinc)) {
48  SmallString<128> Dir(getDriver().SysRoot);
49  llvm::sys::path::append(Dir, "include");
50  addSystemInclude(DriverArgs, CC1Args, Dir.str());
51  }
52 }
53 
55  const llvm::opt::ArgList &DriverArgs,
56  llvm::opt::ArgStringList &CC1Args) const {
57  StringRef LibDir = GCCInstallation.getParentLibPath();
58  const GCCVersion &Version = GCCInstallation.getVersion();
59  StringRef TripleStr = GCCInstallation.getTriple().str();
62  LibDir.str() + "/../" + TripleStr.str() + "/include/c++/" + Version.Text,
63  "", TripleStr, "", "", Multilib.includeSuffix(), DriverArgs, CC1Args);
64 }
65 
66 void RISCV::Linker::ConstructJob(Compilation &C, const JobAction &JA,
67  const InputInfo &Output,
68  const InputInfoList &Inputs,
69  const ArgList &Args,
70  const char *LinkingOutput) const {
71  const ToolChain &ToolChain = getToolChain();
72  const Driver &D = ToolChain.getDriver();
73  ArgStringList CmdArgs;
74 
75  if (!D.SysRoot.empty())
76  CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
77 
78  std::string Linker = getToolChain().GetProgramPath(getShortName());
79 
80  bool WantCRTs =
81  !Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles);
82 
83  if (WantCRTs) {
84  CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crt0.o")));
85  CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtbegin.o")));
86  }
87 
88  Args.AddAllArgs(CmdArgs, options::OPT_L);
89  ToolChain.AddFilePathLibArgs(Args, CmdArgs);
90  Args.AddAllArgs(CmdArgs,
91  {options::OPT_T_Group, options::OPT_e, options::OPT_s,
92  options::OPT_t, options::OPT_Z_Flag, options::OPT_r});
93 
94  AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
95 
96  // TODO: add C++ includes and libs if compiling C++.
97 
98  if (!Args.hasArg(options::OPT_nostdlib) &&
99  !Args.hasArg(options::OPT_nodefaultlibs)) {
100  if (ToolChain.ShouldLinkCXXStdlib(Args))
101  ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
102  CmdArgs.push_back("--start-group");
103  CmdArgs.push_back("-lc");
104  CmdArgs.push_back("-lgloss");
105  CmdArgs.push_back("--end-group");
106  CmdArgs.push_back("-lgcc");
107  }
108 
109  if (WantCRTs)
110  CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtend.o")));
111 
112  CmdArgs.push_back("-o");
113  CmdArgs.push_back(Output.getFilename());
114  C.addCommand(llvm::make_unique<Command>(JA, *this, Args.MakeArgString(Linker),
115  CmdArgs, Inputs));
116 }
117 // 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:219
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.
Definition: RISCV.cpp:42
void addLibStdCxxIncludePaths(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const override
Definition: RISCV.cpp:54
InputInfo - Wrapper for information about an input source.
Definition: InputInfo.h:23
std::string GetFilePath(const char *Name) const
Definition: ToolChain.cpp:416
path_list & getFilePaths()
Definition: ToolChain.h:216
Driver - Encapsulate logic for constructing compilation processes from a set of gcc-driver-like comma...
Definition: Driver.h:59
const GCCVersion & getVersion() const
Get the detected GCC version string.
Definition: Gnu.h:239
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:763
const Driver & getDriver() const
Definition: ToolChain.h:181
Tool * buildLinker() const override
Definition: RISCV.cpp:38
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:687
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:740
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:149
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.
Definition: RISCV.cpp:26
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:2465
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:1644
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:746
ToolChain - Access to tools for a single platform.
Definition: ToolChain.h:88
bool isValid() const
Check whether we detected a valid GCC install.
Definition: Gnu.h:217