> On Jul 19, 2016, at 3:38 PM, Eric Christopher <echri...@gmail.com> wrote:
> 
> 
> 
> On Tue, Jul 19, 2016 at 3:24 PM Vedant Kumar <v...@apple.com> wrote:
> 
> > On Jul 19, 2016, at 3:02 PM, Eric Christopher <echri...@gmail.com> wrote:
> >
> > ... this is pretty crazy. I think that you needed to plumb the effective 
> > triple through everything means that it really needs to be owned somewhere 
> > else and cached.
> >
> > Can you rethink this? In general it doesn't make sense to have everything 
> > need this passed down.
> 
> This came up during review.
> 
> I couldn't find a thread anywhere - and there's not one in the phab revision.

Here's the relevant part of the discussion:

  http://lists.llvm.org/pipermail/cfe-commits/Week-of-Mon-20160711/164519.html


> I did try to find a suitable place to cache the effective triple, but did not
> see one. I still don't, and am open to suggestions / willing to revert for 
> more
> review if you'd like.
> 
> Initially I thought it would be possible to cache the triple in the Tool or
> ToolChain, but that seems like it could break use-cases in which jobs are
> constructed from different threads.
> 
> 
> Where do we do that? As far as I know we don't have a case where this applies 
> and I'd consider all of this infrastructure to be internal for any external 
> tools.

We don't do that in-tree.


> Caching the triple in the Compilation seems like it would have have the same
> issue. I'm not sure how much of a problem this is in practice. We could try
> setting the effective triple in the Compilation with a RAII wrapper, e.g:
> 
>   {
>     RegisterEffectiveTriple TripleRAII(C, EffectiveTriple);
>     T->ConstructJob(...);
>   } // Effective triple cleared from the Compilation.
> 
> Let me know if you have alternate suggestions, and how you'd like to move
> forward.
> 
> 
> Adding Justin here a bit since he's looked at it more recently, but my 
> general case would be to cache in the ToolChain. Anything that has problems 
> with that caching will need to be fixed to deal (either anything depending on 
> ToolChain in clang or external code).

Sure, I can give that a shot (barring any alternate suggestions that may come
up).

To sketch it:

  - Add {get,set}EffectiveTriple to ToolChain
  - Assert that the triple exists in getEffectiveTriple()
  - Use a wrapper to set the triple before Tool::ConstructJob()
  - Remove the extra triple arguments

vedant


> 
> -eric
>  
> thanks,
> vedant
> 
> 
> >
> > Thanks!
> >
> > -eric
> >
> > On Mon, Jul 18, 2016 at 1:04 PM Vedant Kumar via cfe-commits 
> > <cfe-commits@lists.llvm.org> wrote:
> > Author: vedantk
> > Date: Mon Jul 18 14:56:38 2016
> > New Revision: 275895
> >
> > URL: http://llvm.org/viewvc/llvm-project?rev=275895&view=rev
> > Log:
> > [Driver] Compute effective target triples once per job (NFCI)
> >
> > Compute an effective target triple exactly once in ConstructJob(), and
> > then simply pass around references to it. This eliminates wasteful
> > re-computation of effective triples (e.g in getARMFloatABI()).
> >
> > Differential Revision: https://reviews.llvm.org/D22290
> >
> > Modified:
> >     cfe/trunk/docs/ReleaseNotes.rst
> >     cfe/trunk/include/clang/Driver/SanitizerArgs.h
> >     cfe/trunk/include/clang/Driver/Tool.h
> >     cfe/trunk/include/clang/Driver/ToolChain.h
> >     cfe/trunk/lib/Driver/Driver.cpp
> >     cfe/trunk/lib/Driver/SanitizerArgs.cpp
> >     cfe/trunk/lib/Driver/ToolChain.cpp
> >     cfe/trunk/lib/Driver/ToolChains.cpp
> >     cfe/trunk/lib/Driver/ToolChains.h
> >     cfe/trunk/lib/Driver/Tools.cpp
> >     cfe/trunk/lib/Driver/Tools.h
> >
> > Modified: cfe/trunk/docs/ReleaseNotes.rst
> > URL: 
> > http://llvm.org/viewvc/llvm-project/cfe/trunk/docs/ReleaseNotes.rst?rev=275895&r1=275894&r2=275895&view=diff
> > ==============================================================================
> > --- cfe/trunk/docs/ReleaseNotes.rst (original)
> > +++ cfe/trunk/docs/ReleaseNotes.rst Mon Jul 18 14:56:38 2016
> > @@ -121,7 +121,8 @@ These are major API changes that have ha
> >  Clang. If upgrading an external codebase that uses Clang as a library,
> >  this section should help get you past the largest hurdles of upgrading.
> >
> > --  ...
> > +- Classes which inherit from ``driver::Tool`` must be updated to use 
> > effective
> > +  target triples when constructing jobs.
> >
> >  AST Matchers
> >  ------------
> >
> > Modified: cfe/trunk/include/clang/Driver/SanitizerArgs.h
> > URL: 
> > http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/SanitizerArgs.h?rev=275895&r1=275894&r2=275895&view=diff
> > ==============================================================================
> > --- cfe/trunk/include/clang/Driver/SanitizerArgs.h (original)
> > +++ cfe/trunk/include/clang/Driver/SanitizerArgs.h Mon Jul 18 14:56:38 2016
> > @@ -16,6 +16,10 @@
> >  #include <string>
> >  #include <vector>
> >
> > +namespace llvm {
> > +class Triple;
> > +}
> > +
> >  namespace clang {
> >  namespace driver {
> >
> > @@ -66,7 +70,8 @@ class SanitizerArgs {
> >    bool requiresPIE() const;
> >    bool needsUnwindTables() const;
> >    bool linkCXXRuntimes() const { return LinkCXXRuntimes; }
> > -  void addArgs(const ToolChain &TC, const llvm::opt::ArgList &Args,
> > +  void addArgs(const ToolChain &TC, const llvm::Triple &EffectiveTriple,
> > +               const llvm::opt::ArgList &Args,
> >                 llvm::opt::ArgStringList &CmdArgs, types::ID InputType) 
> > const;
> >  };
> >
> >
> > Modified: cfe/trunk/include/clang/Driver/Tool.h
> > URL: 
> > http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/Tool.h?rev=275895&r1=275894&r2=275895&view=diff
> > ==============================================================================
> > --- cfe/trunk/include/clang/Driver/Tool.h (original)
> > +++ cfe/trunk/include/clang/Driver/Tool.h Mon Jul 18 14:56:38 2016
> > @@ -14,6 +14,7 @@
> >  #include "llvm/Support/Program.h"
> >
> >  namespace llvm {
> > +class Triple;
> >  namespace opt {
> >    class ArgList;
> >  }
> > @@ -127,6 +128,7 @@ public:
> >    virtual void ConstructJob(Compilation &C, const JobAction &JA,
> >                              const InputInfo &Output,
> >                              const InputInfoList &Inputs,
> > +                            const llvm::Triple &EffectiveTriple,
> >                              const llvm::opt::ArgList &TCArgs,
> >                              const char *LinkingOutput) const = 0;
> >  };
> >
> > Modified: cfe/trunk/include/clang/Driver/ToolChain.h
> > URL: 
> > http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/ToolChain.h?rev=275895&r1=275894&r2=275895&view=diff
> > ==============================================================================
> > --- cfe/trunk/include/clang/Driver/ToolChain.h (original)
> > +++ cfe/trunk/include/clang/Driver/ToolChain.h Mon Jul 18 14:56:38 2016
> > @@ -260,11 +260,13 @@ public:
> >      return ToolChain::CST_Libstdcxx;
> >    }
> >
> > -  virtual std::string getCompilerRT(const llvm::opt::ArgList &Args,
> > +  virtual std::string getCompilerRT(const llvm::Triple &EffectiveTriple,
> > +                                    const llvm::opt::ArgList &Args,
> >                                      StringRef Component,
> >                                      bool Shared = false) const;
> >
> > -  const char *getCompilerRTArgString(const llvm::opt::ArgList &Args,
> > +  const char *getCompilerRTArgString(const llvm::Triple &EffectiveTriple,
> > +                                     const llvm::opt::ArgList &Args,
> >                                       StringRef Component,
> >                                       bool Shared = false) const;
> >    /// needsProfileRT - returns true if instrumentation profile is on.
> > @@ -410,7 +412,8 @@ public:
> >        const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs) 
> > const;
> >    /// addProfileRTLibs - When -fprofile-instr-profile is specified, try to 
> > pass
> >    /// a suitable profile runtime library to the linker.
> > -  virtual void addProfileRTLibs(const llvm::opt::ArgList &Args,
> > +  virtual void addProfileRTLibs(const llvm::Triple &EffectiveTriple,
> > +                                const llvm::opt::ArgList &Args,
> >                                  llvm::opt::ArgStringList &CmdArgs) const;
> >
> >    /// \brief Add arguments to use system-specific CUDA includes.
> >
> > Modified: cfe/trunk/lib/Driver/Driver.cpp
> > URL: 
> > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/Driver.cpp?rev=275895&r1=275894&r2=275895&view=diff
> > ==============================================================================
> > --- cfe/trunk/lib/Driver/Driver.cpp (original)
> > +++ cfe/trunk/lib/Driver/Driver.cpp Mon Jul 18 14:56:38 2016
> > @@ -2256,7 +2256,21 @@ InputInfo Driver::BuildJobsForActionNoCa
> >                                               TC->getTriple().normalize()),
> >                         BaseInput);
> >
> > +  llvm::Triple EffectiveTriple;
> > +  const ArgList &Args = C.getArgsForToolChain(TC, BoundArch);
> > +  if (InputInfos.size() != 1) {
> > +    EffectiveTriple = llvm::Triple(
> > +        T->getToolChain().ComputeEffectiveClangTriple(Args));
> > +  } else {
> > +    // Pass along the input type if it can be unambiguously determined.
> > +    EffectiveTriple =
> > +        llvm::Triple(T->getToolChain().ComputeEffectiveClangTriple(
> > +            Args, InputInfos[0].getType()));
> > +  }
> > +
> >    if (CCCPrintBindings && !CCGenDiagnostics) {
> > +    // FIXME: We should be able to use the effective triple here, but 
> > doing so
> > +    // breaks some multi-arch tests.
> >      llvm::errs() << "# \"" << T->getToolChain().getTripleString() << '"'
> >                   << " - \"" << T->getName() << "\", inputs: [";
> >      for (unsigned i = 0, e = InputInfos.size(); i != e; ++i) {
> > @@ -2266,7 +2280,7 @@ InputInfo Driver::BuildJobsForActionNoCa
> >      }
> >      llvm::errs() << "], output: " << Result.getAsString() << "\n";
> >    } else {
> > -    T->ConstructJob(C, *JA, Result, InputInfos,
> > +    T->ConstructJob(C, *JA, Result, InputInfos, EffectiveTriple,
> >                      C.getArgsForToolChain(TC, BoundArch), LinkingOutput);
> >    }
> >    return Result;
> >
> > Modified: cfe/trunk/lib/Driver/SanitizerArgs.cpp
> > URL: 
> > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/SanitizerArgs.cpp?rev=275895&r1=275894&r2=275895&view=diff
> > ==============================================================================
> > --- cfe/trunk/lib/Driver/SanitizerArgs.cpp (original)
> > +++ cfe/trunk/lib/Driver/SanitizerArgs.cpp Mon Jul 18 14:56:38 2016
> > @@ -602,7 +602,9 @@ static void addIncludeLinkerOption(const
> >    CmdArgs.push_back(Args.MakeArgString(LinkerOptionFlag));
> >  }
> >
> > -void SanitizerArgs::addArgs(const ToolChain &TC, const llvm::opt::ArgList 
> > &Args,
> > +void SanitizerArgs::addArgs(const ToolChain &TC,
> > +                            const llvm::Triple &EffectiveTriple,
> > +                            const llvm::opt::ArgList &Args,
> >                              llvm::opt::ArgStringList &CmdArgs,
> >                              types::ID InputType) const {
> >    // Translate available CoverageFeatures to corresponding clang-cc1 flags.
> > @@ -626,21 +628,24 @@ void SanitizerArgs::addArgs(const ToolCh
> >      // Instruct the code generator to embed linker directives in the 
> > object file
> >      // that cause the required runtime libraries to be linked.
> >      CmdArgs.push_back(Args.MakeArgString(
> > -        "--dependent-lib=" + TC.getCompilerRT(Args, "ubsan_standalone")));
> > +        "--dependent-lib=" +
> > +        TC.getCompilerRT(EffectiveTriple, Args, "ubsan_standalone")));
> >      if (types::isCXX(InputType))
> >        CmdArgs.push_back(Args.MakeArgString(
> > -          "--dependent-lib=" + TC.getCompilerRT(Args, 
> > "ubsan_standalone_cxx")));
> > +          "--dependent-lib=" +
> > +          TC.getCompilerRT(EffectiveTriple, Args, 
> > "ubsan_standalone_cxx")));
> >    }
> >    if (TC.getTriple().isOSWindows() && needsStatsRt()) {
> > -    CmdArgs.push_back(Args.MakeArgString("--dependent-lib=" +
> > -                                         TC.getCompilerRT(Args, 
> > "stats_client")));
> > +    CmdArgs.push_back(Args.MakeArgString(
> > +        "--dependent-lib=" +
> > +        TC.getCompilerRT(EffectiveTriple, Args, "stats_client")));
> >
> >      // The main executable must export the stats runtime.
> >      // FIXME: Only exporting from the main executable (e.g. based on 
> > whether the
> >      // translation unit defines main()) would save a little space, but 
> > having
> >      // multiple copies of the runtime shouldn't hurt.
> > -    CmdArgs.push_back(Args.MakeArgString("--dependent-lib=" +
> > -                                         TC.getCompilerRT(Args, "stats")));
> > +    CmdArgs.push_back(Args.MakeArgString(
> > +        "--dependent-lib=" + TC.getCompilerRT(EffectiveTriple, Args, 
> > "stats")));
> >      addIncludeLinkerOption(TC, Args, CmdArgs, 
> > "__sanitizer_stats_register");
> >    }
> >
> >
> > Modified: cfe/trunk/lib/Driver/ToolChain.cpp
> > URL: 
> > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/ToolChain.cpp?rev=275895&r1=275894&r2=275895&view=diff
> > ==============================================================================
> > --- cfe/trunk/lib/Driver/ToolChain.cpp (original)
> > +++ cfe/trunk/lib/Driver/ToolChain.cpp Mon Jul 18 14:56:38 2016
> > @@ -267,46 +267,52 @@ Tool *ToolChain::getTool(Action::ActionC
> >    llvm_unreachable("Invalid tool kind.");
> >  }
> >
> > -static StringRef getArchNameForCompilerRTLib(const ToolChain &TC,
> > -                                             const ArgList &Args) {
> > -  const llvm::Triple &Triple = TC.getTriple();
> > -  bool IsWindows = Triple.isOSWindows();
> > +static StringRef
> > +getArchNameForCompilerRTLib(const ToolChain &TC,
> > +                            const llvm::Triple &EffectiveTriple,
> > +                            const ArgList &Args) {
> > +  bool IsWindows = EffectiveTriple.isOSWindows();
> >
> > -  if (Triple.isWindowsMSVCEnvironment() && TC.getArch() == 
> > llvm::Triple::x86)
> > +  if (EffectiveTriple.isWindowsMSVCEnvironment() &&
> > +      TC.getArch() == llvm::Triple::x86)
> >      return "i386";
> >
> >    if (TC.getArch() == llvm::Triple::arm || TC.getArch() == 
> > llvm::Triple::armeb)
> > -    return (arm::getARMFloatABI(TC, Args) == arm::FloatABI::Hard && 
> > !IsWindows)
> > +    return (arm::getARMFloatABI(TC, EffectiveTriple, Args) ==
> > +                arm::FloatABI::Hard &&
> > +            !IsWindows)
> >                 ? "armhf"
> >                 : "arm";
> >
> >    return TC.getArchName();
> >  }
> >
> > -std::string ToolChain::getCompilerRT(const ArgList &Args, StringRef 
> > Component,
> > +std::string ToolChain::getCompilerRT(const llvm::Triple &EffectiveTriple,
> > +                                     const ArgList &Args, StringRef 
> > Component,
> >                                       bool Shared) const {
> > -  const llvm::Triple &TT = getTriple();
> > -  const char *Env = TT.isAndroid() ? "-android" : "";
> > -  bool IsITANMSVCWindows =
> > -      TT.isWindowsMSVCEnvironment() || TT.isWindowsItaniumEnvironment();
> > +  const char *Env = EffectiveTriple.isAndroid() ? "-android" : "";
> > +  bool IsITANMSVCWindows = EffectiveTriple.isWindowsMSVCEnvironment() ||
> > +                           EffectiveTriple.isWindowsItaniumEnvironment();
> >
> > -  StringRef Arch = getArchNameForCompilerRTLib(*this, Args);
> > +  StringRef Arch = getArchNameForCompilerRTLib(*this, EffectiveTriple, 
> > Args);
> >    const char *Prefix = IsITANMSVCWindows ? "" : "lib";
> > -  const char *Suffix = Shared ? (Triple.isOSWindows() ? ".dll" : ".so")
> > +  const char *Suffix = Shared ? (EffectiveTriple.isOSWindows() ? ".dll" : 
> > ".so")
> >                                : (IsITANMSVCWindows ? ".lib" : ".a");
> >
> >    SmallString<128> Path(getDriver().ResourceDir);
> > -  StringRef OSLibName = Triple.isOSFreeBSD() ? "freebsd" : getOS();
> > +  StringRef OSLibName = EffectiveTriple.isOSFreeBSD() ? "freebsd" : 
> > getOS();
> >    llvm::sys::path::append(Path, "lib", OSLibName);
> >    llvm::sys::path::append(Path, Prefix + Twine("clang_rt.") + Component + 
> > "-" +
> >                                      Arch + Env + Suffix);
> >    return Path.str();
> >  }
> >
> > -const char *ToolChain::getCompilerRTArgString(const llvm::opt::ArgList 
> > &Args,
> > -                                              StringRef Component,
> > -                                              bool Shared) const {
> > -  return Args.MakeArgString(getCompilerRT(Args, Component, Shared));
> > +const char *
> > +ToolChain::getCompilerRTArgString(const llvm::Triple &EffectiveTriple,
> > +                                  const llvm::opt::ArgList &Args,
> > +                                  StringRef Component, bool Shared) const {
> > +  return Args.MakeArgString(
> > +      getCompilerRT(EffectiveTriple, Args, Component, Shared));
> >  }
> >
> >  bool ToolChain::needsProfileRT(const ArgList &Args) {
> > @@ -517,11 +523,13 @@ void ToolChain::addClangTargetOptions(co
> >
> >  void ToolChain::addClangWarningOptions(ArgStringList &CC1Args) const {}
> >
> > -void ToolChain::addProfileRTLibs(const llvm::opt::ArgList &Args,
> > +void ToolChain::addProfileRTLibs(const llvm::Triple &EffectiveTriple,
> > +                                 const llvm::opt::ArgList &Args,
> >                                   llvm::opt::ArgStringList &CmdArgs) const {
> > -  if (!needsProfileRT(Args)) return;
> > +  if (!needsProfileRT(Args))
> > +    return;
> >
> > -  CmdArgs.push_back(getCompilerRTArgString(Args, "profile"));
> > +  CmdArgs.push_back(getCompilerRTArgString(EffectiveTriple, Args, 
> > "profile"));
> >  }
> >
> >  ToolChain::RuntimeLibType ToolChain::GetRuntimeLibType(
> >
> > Modified: cfe/trunk/lib/Driver/ToolChains.cpp
> > URL: 
> > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/ToolChains.cpp?rev=275895&r1=275894&r2=275895&view=diff
> > ==============================================================================
> > --- cfe/trunk/lib/Driver/ToolChains.cpp (original)
> > +++ cfe/trunk/lib/Driver/ToolChains.cpp Mon Jul 18 14:56:38 2016
> > @@ -380,13 +380,16 @@ StringRef Darwin::getOSLibraryNameSuffix
> >    llvm_unreachable("Unsupported platform");
> >  }
> >
> > -void Darwin::addProfileRTLibs(const ArgList &Args,
> > +void Darwin::addProfileRTLibs(const llvm::Triple &EffectiveTriple,
> > +                              const ArgList &Args,
> >                                ArgStringList &CmdArgs) const {
> > -  if (!needsProfileRT(Args)) return;
> > +  if (!needsProfileRT(Args))
> > +    return;
> >
> > -  AddLinkRuntimeLib(Args, CmdArgs, (Twine("libclang_rt.profile_") +
> > -       getOSLibraryNameSuffix() + ".a").str(),
> > -                    /*AlwaysLink*/ true);
> > +  AddLinkRuntimeLib(
> > +      Args, CmdArgs,
> > +      (Twine("libclang_rt.profile_") + getOSLibraryNameSuffix() + 
> > ".a").str(),
> > +      /*AlwaysLink*/ true);
> >  }
> >
> >  void DarwinClang::AddLinkSanitizerLibArgs(const ArgList &Args,
> > @@ -400,7 +403,8 @@ void DarwinClang::AddLinkSanitizerLibArg
> >        /*AddRPath*/ true);
> >  }
> >
> > -void DarwinClang::AddLinkRuntimeLibArgs(const ArgList &Args,
> > +void DarwinClang::AddLinkRuntimeLibArgs(const llvm::Triple 
> > &EffectiveTriple,
> > +                                        const ArgList &Args,
> >                                          ArgStringList &CmdArgs) const {
> >    // Darwin only supports the compiler-rt based runtime libraries.
> >    switch (GetRuntimeLibType(Args)) {
> > @@ -1012,16 +1016,17 @@ DerivedArgList *MachO::TranslateArgs(con
> >    return DAL;
> >  }
> >
> > -void MachO::AddLinkRuntimeLibArgs(const ArgList &Args,
> > +void MachO::AddLinkRuntimeLibArgs(const llvm::Triple &EffectiveTriple,
> > +                                  const ArgList &Args,
> >                                    ArgStringList &CmdArgs) const {
> >    // Embedded targets are simple at the moment, not supporting sanitizers 
> > and
> >    // with different libraries for each member of the product { static, PIC 
> > } x
> >    // { hard-float, soft-float }
> >    llvm::SmallString<32> CompilerRT = StringRef("libclang_rt.");
> > -  CompilerRT +=
> > -      (tools::arm::getARMFloatABI(*this, Args) == 
> > tools::arm::FloatABI::Hard)
> > -          ? "hard"
> > -          : "soft";
> > +  CompilerRT += (tools::arm::getARMFloatABI(*this, EffectiveTriple, Args) 
> > ==
> > +                 tools::arm::FloatABI::Hard)
> > +                    ? "hard"
> > +                    : "soft";
> >    CompilerRT += Args.hasArg(options::OPT_fPIC) ? "_pic.a" : "_static.a";
> >
> >    AddLinkRuntimeLib(Args, CmdArgs, CompilerRT, false, true);
> > @@ -2858,9 +2863,10 @@ void MipsLLVMToolChain::AddCXXStdlibLibA
> >    CmdArgs.push_back("-lunwind");
> >  }
> >
> > -std::string MipsLLVMToolChain::getCompilerRT(const ArgList &Args,
> > -                                             StringRef Component,
> > -                                             bool Shared) const {
> > +std::string
> > +MipsLLVMToolChain::getCompilerRT(const llvm::Triple &EffectiveTriple,
> > +                                 const ArgList &Args, StringRef Component,
> > +                                 bool Shared) const {
> >    SmallString<128> Path(getDriver().ResourceDir);
> >    llvm::sys::path::append(Path, SelectedMultilib.osSuffix(), "lib" + 
> > LibSuffix,
> >                            getOS());
> > @@ -4237,9 +4243,9 @@ std::string Linux::getDynamicLinker(cons
> >    case llvm::Triple::thumb:
> >    case llvm::Triple::armeb:
> >    case llvm::Triple::thumbeb: {
> > -    const bool HF =
> > -        Triple.getEnvironment() == llvm::Triple::GNUEABIHF ||
> > -        tools::arm::getARMFloatABI(*this, Args) == 
> > tools::arm::FloatABI::Hard;
> > +    const bool HF = Triple.getEnvironment() == llvm::Triple::GNUEABIHF ||
> > +                    tools::arm::getARMFloatABI(*this, Triple, Args) ==
> > +                        tools::arm::FloatABI::Hard;
> >
> >      LibDir = "lib";
> >      Loader = HF ? "ld-linux-armhf.so.3" : "ld-linux.so.3";
> > @@ -4631,16 +4637,18 @@ SanitizerMask Linux::getSupportedSanitiz
> >    return Res;
> >  }
> >
> > -void Linux::addProfileRTLibs(const llvm::opt::ArgList &Args,
> > +void Linux::addProfileRTLibs(const llvm::Triple &EffectiveTriple,
> > +                             const llvm::opt::ArgList &Args,
> >                               llvm::opt::ArgStringList &CmdArgs) const {
> > -  if (!needsProfileRT(Args)) return;
> > +  if (!needsProfileRT(Args))
> > +    return;
> >
> >    // Add linker option -u__llvm_runtime_variable to cause runtime
> >    // initialization module to be linked in.
> >    if (!Args.hasArg(options::OPT_coverage))
> >      CmdArgs.push_back(Args.MakeArgString(
> >          Twine("-u", llvm::getInstrProfRuntimeHookVarName())));
> > -  ToolChain::addProfileRTLibs(Args, CmdArgs);
> > +  ToolChain::addProfileRTLibs(EffectiveTriple, Args, CmdArgs);
> >  }
> >
> >  /// DragonFly - DragonFly tool chain which can call as(1) and ld(1) 
> > directly.
> >
> > Modified: cfe/trunk/lib/Driver/ToolChains.h
> > URL: 
> > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/ToolChains.h?rev=275895&r1=275894&r2=275895&view=diff
> > ==============================================================================
> > --- cfe/trunk/lib/Driver/ToolChains.h (original)
> > +++ cfe/trunk/lib/Driver/ToolChains.h Mon Jul 18 14:56:38 2016
> > @@ -279,7 +279,8 @@ public:
> >                                llvm::opt::ArgStringList &CmdArgs) const {}
> >
> >    /// Add the linker arguments to link the compiler runtime library.
> > -  virtual void AddLinkRuntimeLibArgs(const llvm::opt::ArgList &Args,
> > +  virtual void AddLinkRuntimeLibArgs(const llvm::Triple &EffectiveTriple,
> > +                                     const llvm::opt::ArgList &Args,
> >                                       llvm::opt::ArgStringList &CmdArgs) 
> > const;
> >
> >    virtual void addStartObjectFileArgs(const llvm::opt::ArgList &Args,
> > @@ -303,7 +304,8 @@ public:
> >
> >    /// Add any profiling runtime libraries that are needed. This is 
> > essentially a
> >    /// MachO specific version of addProfileRT in Tools.cpp.
> > -  void addProfileRTLibs(const llvm::opt::ArgList &Args,
> > +  void addProfileRTLibs(const llvm::Triple &EffectiveTriple,
> > +                        const llvm::opt::ArgList &Args,
> >                          llvm::opt::ArgStringList &CmdArgs) const override {
> >      // There aren't any profiling libs for embedded targets currently.
> >    }
> > @@ -417,7 +419,8 @@ public:
> >              !isTargetWatchOS());
> >    }
> >
> > -  void addProfileRTLibs(const llvm::opt::ArgList &Args,
> > +  void addProfileRTLibs(const llvm::Triple &EffectiveTriple,
> > +                        const llvm::opt::ArgList &Args,
> >                          llvm::opt::ArgStringList &CmdArgs) const override;
> >
> >  protected:
> > @@ -572,7 +575,8 @@ public:
> >    /// @name Apple ToolChain Implementation
> >    /// {
> >
> > -  void AddLinkRuntimeLibArgs(const llvm::opt::ArgList &Args,
> > +  void AddLinkRuntimeLibArgs(const llvm::Triple &EffectiveTriple,
> > +                             const llvm::opt::ArgList &Args,
> >                               llvm::opt::ArgStringList &CmdArgs) const 
> > override;
> >
> >    void AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args,
> > @@ -838,7 +842,8 @@ public:
> >                             llvm::opt::ArgStringList &CC1Args) const 
> > override;
> >    bool isPIEDefault() const override;
> >    SanitizerMask getSupportedSanitizers() const override;
> > -  void addProfileRTLibs(const llvm::opt::ArgList &Args,
> > +  void addProfileRTLibs(const llvm::Triple &EffectiveTriple,
> > +                        const llvm::opt::ArgList &Args,
> >                          llvm::opt::ArgStringList &CmdArgs) const override;
> >    virtual std::string computeSysRoot() const;
> >
> > @@ -902,7 +907,8 @@ public:
> >    void AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args,
> >                             llvm::opt::ArgStringList &CmdArgs) const 
> > override;
> >
> > -  std::string getCompilerRT(const llvm::opt::ArgList &Args, StringRef 
> > Component,
> > +  std::string getCompilerRT(const llvm::Triple &EffectiveTriple,
> > +                            const llvm::opt::ArgList &Args, StringRef 
> > Component,
> >                              bool Shared = false) const override;
> >
> >    std::string computeSysRoot() const override;
> >
> > Modified: cfe/trunk/lib/Driver/Tools.cpp
> > URL: 
> > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/Tools.cpp?rev=275895&r1=275894&r2=275895&view=diff
> > ==============================================================================
> > --- cfe/trunk/lib/Driver/Tools.cpp (original)
> > +++ cfe/trunk/lib/Driver/Tools.cpp Mon Jul 18 14:56:38 2016
> > @@ -771,10 +771,11 @@ static bool useAAPCSForMachO(const llvm:
> >
> >  // Select the float ABI as determined by -msoft-float, -mhard-float, and
> >  // -mfloat-abi=.
> > -arm::FloatABI arm::getARMFloatABI(const ToolChain &TC, const ArgList 
> > &Args) {
> > +arm::FloatABI arm::getARMFloatABI(const ToolChain &TC,
> > +                                  const llvm::Triple &EffectiveTriple,
> > +                                  const ArgList &Args) {
> >    const Driver &D = TC.getDriver();
> > -  const llvm::Triple Triple(TC.ComputeEffectiveClangTriple(Args));
> > -  auto SubArch = getARMSubArchVersionNumber(Triple);
> > +  auto SubArch = getARMSubArchVersionNumber(EffectiveTriple);
> >    arm::FloatABI ABI = FloatABI::Invalid;
> >    if (Arg *A =
> >            Args.getLastArg(options::OPT_msoft_float, 
> > options::OPT_mhard_float,
> > @@ -797,23 +798,23 @@ arm::FloatABI arm::getARMFloatABI(const
> >
> >      // It is incorrect to select hard float ABI on MachO platforms if the 
> > ABI is
> >      // "apcs-gnu".
> > -    if (Triple.isOSBinFormatMachO() && !useAAPCSForMachO(Triple) &&
> > -        ABI == FloatABI::Hard) {
> > -      D.Diag(diag::err_drv_unsupported_opt_for_target) << 
> > A->getAsString(Args)
> > -                                                       << 
> > Triple.getArchName();
> > +    if (EffectiveTriple.isOSBinFormatMachO() &&
> > +        !useAAPCSForMachO(EffectiveTriple) && ABI == FloatABI::Hard) {
> > +      D.Diag(diag::err_drv_unsupported_opt_for_target)
> > +          << A->getAsString(Args) << EffectiveTriple.getArchName();
> >      }
> >    }
> >
> >    // If unspecified, choose the default based on the platform.
> >    if (ABI == FloatABI::Invalid) {
> > -    switch (Triple.getOS()) {
> > +    switch (EffectiveTriple.getOS()) {
> >      case llvm::Triple::Darwin:
> >      case llvm::Triple::MacOSX:
> >      case llvm::Triple::IOS:
> >      case llvm::Triple::TvOS: {
> >        // Darwin defaults to "softfp" for v6 and v7.
> >        ABI = (SubArch == 6 || SubArch == 7) ? FloatABI::SoftFP : 
> > FloatABI::Soft;
> > -      ABI = Triple.isWatchABI() ? FloatABI::Hard : ABI;
> > +      ABI = EffectiveTriple.isWatchABI() ? FloatABI::Hard : ABI;
> >        break;
> >      }
> >      case llvm::Triple::WatchOS:
> > @@ -826,7 +827,7 @@ arm::FloatABI arm::getARMFloatABI(const
> >        break;
> >
> >      case llvm::Triple::FreeBSD:
> > -      switch (Triple.getEnvironment()) {
> > +      switch (EffectiveTriple.getEnvironment()) {
> >        case llvm::Triple::GNUEABIHF:
> >          ABI = FloatABI::Hard;
> >          break;
> > @@ -838,7 +839,7 @@ arm::FloatABI arm::getARMFloatABI(const
> >        break;
> >
> >      default:
> > -      switch (Triple.getEnvironment()) {
> > +      switch (EffectiveTriple.getEnvironment()) {
> >        case llvm::Triple::GNUEABIHF:
> >        case llvm::Triple::MuslEABIHF:
> >        case llvm::Triple::EABIHF:
> > @@ -855,14 +856,14 @@ arm::FloatABI arm::getARMFloatABI(const
> >          break;
> >        default:
> >          // Assume "soft", but warn the user we are guessing.
> > -        if (Triple.isOSBinFormatMachO() &&
> > -            Triple.getSubArch() == llvm::Triple::ARMSubArch_v7em)
> > +        if (EffectiveTriple.isOSBinFormatMachO() &&
> > +            EffectiveTriple.getSubArch() == llvm::Triple::ARMSubArch_v7em)
> >            ABI = FloatABI::Hard;
> >          else
> >            ABI = FloatABI::Soft;
> >
> > -        if (Triple.getOS() != llvm::Triple::UnknownOS ||
> > -            !Triple.isOSBinFormatMachO())
> > +        if (EffectiveTriple.getOS() != llvm::Triple::UnknownOS ||
> > +            !EffectiveTriple.isOSBinFormatMachO())
> >            D.Diag(diag::warn_drv_assuming_mfloat_abi_is) << "soft";
> >          break;
> >        }
> > @@ -882,7 +883,7 @@ static void getARMTargetFeatures(const T
> >
> >    bool KernelOrKext =
> >        Args.hasArg(options::OPT_mkernel, options::OPT_fapple_kext);
> > -  arm::FloatABI ABI = arm::getARMFloatABI(TC, Args);
> > +  arm::FloatABI ABI = arm::getARMFloatABI(TC, Triple, Args);
> >    const Arg *WaCPU = nullptr, *WaFPU = nullptr;
> >    const Arg *WaHDiv = nullptr, *WaArch = nullptr;
> >
> > @@ -1011,7 +1012,7 @@ static void getARMTargetFeatures(const T
> >        Features.push_back("+long-calls");
> >    } else if (KernelOrKext && (!Triple.isiOS() || Triple.isOSVersionLT(6)) 
> > &&
> >               !Triple.isWatchOS()) {
> > -      Features.push_back("+long-calls");
> > +    Features.push_back("+long-calls");
> >    }
> >
> >    // Kernel code has more strict alignment requirements.
> > @@ -1025,7 +1026,8 @@ static void getARMTargetFeatures(const T
> >          D.Diag(diag::err_target_unsupported_unaligned) << "v6m";
> >        // v8M Baseline follows on from v6M, so doesn't support unaligned 
> > memory
> >        // access either.
> > -      else if (Triple.getSubArch() == 
> > llvm::Triple::SubArchType::ARMSubArch_v8m_baseline)
> > +      else if (Triple.getSubArch() ==
> > +               llvm::Triple::SubArchType::ARMSubArch_v8m_baseline)
> >          D.Diag(diag::err_target_unsupported_unaligned) << "v8m.base";
> >      } else
> >        Features.push_back("+strict-align");
> > @@ -1111,7 +1113,7 @@ void Clang::AddARMTargetArgs(const llvm:
> >    CmdArgs.push_back(ABIName);
> >
> >    // Determine floating point ABI from the options & target defaults.
> > -  arm::FloatABI ABI = arm::getARMFloatABI(getToolChain(), Args);
> > +  arm::FloatABI ABI = arm::getARMFloatABI(getToolChain(), Triple, Args);
> >    if (ABI == arm::FloatABI::Soft) {
> >      // Floating point operations and argument passing are soft.
> >      // FIXME: This changes CPP defines, we need -target-soft-float.
> > @@ -1172,11 +1174,9 @@ static std::string getAArch64TargetCPU(c
> >    return "generic";
> >  }
> >
> > -void Clang::AddAArch64TargetArgs(const ArgList &Args,
> > +void Clang::AddAArch64TargetArgs(const llvm::Triple &EffectiveTriple,
> > +                                 const ArgList &Args,
> >                                   ArgStringList &CmdArgs) const {
> > -  std::string TripleStr = getToolChain().ComputeEffectiveClangTriple(Args);
> > -  llvm::Triple Triple(TripleStr);
> > -
> >    if (!Args.hasFlag(options::OPT_mred_zone, options::OPT_mno_red_zone, 
> > true) ||
> >        Args.hasArg(options::OPT_mkernel) ||
> >        Args.hasArg(options::OPT_fapple_kext))
> > @@ -1189,7 +1189,7 @@ void Clang::AddAArch64TargetArgs(const A
> >    const char *ABIName = nullptr;
> >    if (Arg *A = Args.getLastArg(options::OPT_mabi_EQ))
> >      ABIName = A->getValue();
> > -  else if (Triple.isOSDarwin())
> > +  else if (EffectiveTriple.isOSDarwin())
> >      ABIName = "darwinpcs";
> >    else
> >      ABIName = "aapcs";
> > @@ -1204,7 +1204,7 @@ void Clang::AddAArch64TargetArgs(const A
> >        CmdArgs.push_back("-aarch64-fix-cortex-a53-835769=1");
> >      else
> >        CmdArgs.push_back("-aarch64-fix-cortex-a53-835769=0");
> > -  } else if (Triple.isAndroid()) {
> > +  } else if (EffectiveTriple.isAndroid()) {
> >      // Enabled A53 errata (835769) workaround by default on android
> >      CmdArgs.push_back("-backend-option");
> >      CmdArgs.push_back("-aarch64-fix-cortex-a53-835769=1");
> > @@ -2999,9 +2999,10 @@ static void CollectArgsForIntegratedAsse
> >  // This adds the static libclang_rt.builtins-arch.a directly to the 
> > command line
> >  // FIXME: Make sure we can also emit shared objects if they're requested
> >  // and available, check for possible errors, etc.
> > -static void addClangRT(const ToolChain &TC, const ArgList &Args,
> > -                       ArgStringList &CmdArgs) {
> > -  CmdArgs.push_back(TC.getCompilerRTArgString(Args, "builtins"));
> > +static void addClangRT(const ToolChain &TC, const llvm::Triple 
> > &EffectiveTriple,
> > +                       const ArgList &Args, ArgStringList &CmdArgs) {
> > +  CmdArgs.push_back(
> > +      TC.getCompilerRTArgString(EffectiveTriple, Args, "builtins"));
> >  }
> >
> >  namespace {
> > @@ -3075,22 +3076,27 @@ static void addOpenMPRuntime(ArgStringLi
> >    }
> >  }
> >
> > -static void addSanitizerRuntime(const ToolChain &TC, const ArgList &Args,
> > -                                ArgStringList &CmdArgs, StringRef 
> > Sanitizer,
> > -                                bool IsShared, bool IsWhole) {
> > +static void addSanitizerRuntime(const ToolChain &TC,
> > +                                const llvm::Triple &EffectiveTriple,
> > +                                const ArgList &Args, ArgStringList 
> > &CmdArgs,
> > +                                StringRef Sanitizer, bool IsShared,
> > +                                bool IsWhole) {
> >    // Wrap any static runtimes that must be forced into executable in
> >    // whole-archive.
> >    if (IsWhole) CmdArgs.push_back("-whole-archive");
> > -  CmdArgs.push_back(TC.getCompilerRTArgString(Args, Sanitizer, IsShared));
> > -  if (IsWhole) CmdArgs.push_back("-no-whole-archive");
> > +  CmdArgs.push_back(
> > +      TC.getCompilerRTArgString(EffectiveTriple, Args, Sanitizer, 
> > IsShared));
> > +  if (IsWhole)
> > +    CmdArgs.push_back("-no-whole-archive");
> >  }
> >
> >  // Tries to use a file with the list of dynamic symbols that need to be 
> > exported
> >  // from the runtime library. Returns true if the file was found.
> > -static bool addSanitizerDynamicList(const ToolChain &TC, const ArgList 
> > &Args,
> > -                                    ArgStringList &CmdArgs,
> > +static bool addSanitizerDynamicList(const ToolChain &TC,
> > +                                    const llvm::Triple &EffectiveTriple,
> > +                                    const ArgList &Args, ArgStringList 
> > &CmdArgs,
> >                                      StringRef Sanitizer) {
> > -  SmallString<128> SanRT(TC.getCompilerRT(Args, Sanitizer));
> > +  SmallString<128> SanRT(TC.getCompilerRT(EffectiveTriple, Args, 
> > Sanitizer));
> >    if (llvm::sys::fs::exists(SanRT + ".syms")) {
> >      CmdArgs.push_back(Args.MakeArgString("--dynamic-list=" + SanRT + 
> > ".syms"));
> >      return true;
> > @@ -3179,25 +3185,28 @@ collectSanitizerRuntimes(const ToolChain
> >
> >  // Should be called before we add system libraries (C++ ABI, 
> > libstdc++/libc++,
> >  // C runtime, etc). Returns true if sanitizer system deps need to be 
> > linked in.
> > -static bool addSanitizerRuntimes(const ToolChain &TC, const ArgList &Args,
> > -                                 ArgStringList &CmdArgs) {
> > +static bool addSanitizerRuntimes(const ToolChain &TC,
> > +                                 const llvm::Triple &EffectiveTriple,
> > +                                 const ArgList &Args, ArgStringList 
> > &CmdArgs) {
> >    SmallVector<StringRef, 4> SharedRuntimes, StaticRuntimes,
> >        NonWholeStaticRuntimes, HelperStaticRuntimes, RequiredSymbols;
> >    collectSanitizerRuntimes(TC, Args, SharedRuntimes, StaticRuntimes,
> >                             NonWholeStaticRuntimes, HelperStaticRuntimes,
> >                             RequiredSymbols);
> >    for (auto RT : SharedRuntimes)
> > -    addSanitizerRuntime(TC, Args, CmdArgs, RT, true, false);
> > +    addSanitizerRuntime(TC, EffectiveTriple, Args, CmdArgs, RT, true, 
> > false);
> >    for (auto RT : HelperStaticRuntimes)
> > -    addSanitizerRuntime(TC, Args, CmdArgs, RT, false, true);
> > +    addSanitizerRuntime(TC, EffectiveTriple, Args, CmdArgs, RT, false, 
> > true);
> >    bool AddExportDynamic = false;
> >    for (auto RT : StaticRuntimes) {
> > -    addSanitizerRuntime(TC, Args, CmdArgs, RT, false, true);
> > -    AddExportDynamic |= !addSanitizerDynamicList(TC, Args, CmdArgs, RT);
> > +    addSanitizerRuntime(TC, EffectiveTriple, Args, CmdArgs, RT, false, 
> > true);
> > +    AddExportDynamic |=
> > +        !addSanitizerDynamicList(TC, EffectiveTriple, Args, CmdArgs, RT);
> >    }
> >    for (auto RT : NonWholeStaticRuntimes) {
> > -    addSanitizerRuntime(TC, Args, CmdArgs, RT, false, false);
> > -    AddExportDynamic |= !addSanitizerDynamicList(TC, Args, CmdArgs, RT);
> > +    addSanitizerRuntime(TC, EffectiveTriple, Args, CmdArgs, RT, false, 
> > false);
> > +    AddExportDynamic |=
> > +        !addSanitizerDynamicList(TC, EffectiveTriple, Args, CmdArgs, RT);
> >    }
> >    for (auto S : RequiredSymbols) {
> >      CmdArgs.push_back("-u");
> > @@ -3210,12 +3219,14 @@ static bool addSanitizerRuntimes(const T
> >    return !StaticRuntimes.empty();
> >  }
> >
> > -static bool addXRayRuntime(const ToolChain &TC, const ArgList &Args,
> > -                           ArgStringList &CmdArgs) {
> > +static bool addXRayRuntime(const ToolChain &TC,
> > +                           const llvm::Triple &EffectiveTriple,
> > +                           const ArgList &Args, ArgStringList &CmdArgs) {
> >    if (Args.hasFlag(options::OPT_fxray_instrument,
> >                     options::OPT_fnoxray_instrument, false)) {
> >      CmdArgs.push_back("-whole-archive");
> > -    CmdArgs.push_back(TC.getCompilerRTArgString(Args, "xray", false));
> > +    CmdArgs.push_back(
> > +        TC.getCompilerRTArgString(EffectiveTriple, Args, "xray", false));
> >      CmdArgs.push_back("-no-whole-archive");
> >      return true;
> >    }
> > @@ -3825,9 +3836,9 @@ static void AddAssemblerKPIC(const ToolC
> >
> >  void Clang::ConstructJob(Compilation &C, const JobAction &JA,
> >                           const InputInfo &Output, const InputInfoList 
> > &Inputs,
> > +                         const llvm::Triple &EffectiveTriple,
> >                           const ArgList &Args, const char *LinkingOutput) 
> > const {
> > -  std::string TripleStr = getToolChain().ComputeEffectiveClangTriple(Args);
> > -  const llvm::Triple Triple(TripleStr);
> > +  std::string TripleStr = EffectiveTriple.str();
> >
> >    bool KernelOrKext =
> >        Args.hasArg(options::OPT_mkernel, options::OPT_fapple_kext);
> > @@ -3880,13 +3891,14 @@ void Clang::ConstructJob(Compilation &C,
> >      CmdArgs.push_back(Args.MakeArgString(NormalizedTriple));
> >    }
> >
> > -  if (Triple.isOSWindows() && (Triple.getArch() == llvm::Triple::arm ||
> > -                               Triple.getArch() == llvm::Triple::thumb)) {
> > -    unsigned Offset = Triple.getArch() == llvm::Triple::arm ? 4 : 6;
> > +  if (EffectiveTriple.isOSWindows() &&
> > +      (EffectiveTriple.getArch() == llvm::Triple::arm ||
> > +       EffectiveTriple.getArch() == llvm::Triple::thumb)) {
> > +    unsigned Offset = EffectiveTriple.getArch() == llvm::Triple::arm ? 4 : 
> > 6;
> >      unsigned Version;
> > -    Triple.getArchName().substr(Offset).getAsInteger(10, Version);
> > +    EffectiveTriple.getArchName().substr(Offset).getAsInteger(10, Version);
> >      if (Version < 7)
> > -      D.Diag(diag::err_target_unsupported_arch) << Triple.getArchName()
> > +      D.Diag(diag::err_target_unsupported_arch) << 
> > EffectiveTriple.getArchName()
> >                                                  << TripleStr;
> >    }
> >
> > @@ -4088,7 +4100,7 @@ void Clang::ConstructJob(Compilation &C,
> >    unsigned PICLevel;
> >    bool IsPIE;
> >    std::tie(RelocationModel, PICLevel, IsPIE) =
> > -      ParsePICArgs(getToolChain(), Triple, Args);
> > +      ParsePICArgs(getToolChain(), EffectiveTriple, Args);
> >
> >    const char *RMName = RelocationModelName(RelocationModel);
> >    if (RMName) {
> > @@ -4187,8 +4199,7 @@ void Clang::ConstructJob(Compilation &C,
> >                     false))
> >      CmdArgs.push_back("-fstrict-enums");
> >    if (Args.hasFlag(options::OPT_fstrict_vtable_pointers,
> > -                   options::OPT_fno_strict_vtable_pointers,
> > -                   false))
> > +                   options::OPT_fno_strict_vtable_pointers, false))
> >      CmdArgs.push_back("-fstrict-vtable-pointers");
> >    if (!Args.hasFlag(options::OPT_foptimize_sibling_calls,
> >                      options::OPT_fno_optimize_sibling_calls))
> > @@ -4403,7 +4414,7 @@ void Clang::ConstructJob(Compilation &C,
> >    }
> >
> >    // Add the target cpu
> > -  std::string CPU = getCPUName(Args, Triple, /*FromAs*/ false);
> > +  std::string CPU = getCPUName(Args, EffectiveTriple, /*FromAs*/ false);
> >    if (!CPU.empty()) {
> >      CmdArgs.push_back("-target-cpu");
> >      CmdArgs.push_back(Args.MakeArgString(CPU));
> > @@ -4415,7 +4426,7 @@ void Clang::ConstructJob(Compilation &C,
> >    }
> >
> >    // Add the target features
> > -  getTargetFeatures(getToolChain(), Triple, Args, CmdArgs, false);
> > +  getTargetFeatures(getToolChain(), EffectiveTriple, Args, CmdArgs, false);
> >
> >    // Add target specific flags.
> >    switch (getToolChain().getArch()) {
> > @@ -4427,12 +4438,12 @@ void Clang::ConstructJob(Compilation &C,
> >    case llvm::Triple::thumb:
> >    case llvm::Triple::thumbeb:
> >      // Use the effective triple, which takes into account the deployment 
> > target.
> > -    AddARMTargetArgs(Triple, Args, CmdArgs, KernelOrKext);
> > +    AddARMTargetArgs(EffectiveTriple, Args, CmdArgs, KernelOrKext);
> >      break;
> >
> >    case llvm::Triple::aarch64:
> >    case llvm::Triple::aarch64_be:
> > -    AddAArch64TargetArgs(Args, CmdArgs);
> > +    AddAArch64TargetArgs(EffectiveTriple, Args, CmdArgs);
> >      break;
> >
> >    case llvm::Triple::mips:
> > @@ -4553,8 +4564,8 @@ void Clang::ConstructJob(Compilation &C,
> >    }
> >
> >    // If a debugger tuning argument appeared, remember it.
> > -  if (Arg *A = Args.getLastArg(options::OPT_gTune_Group,
> > -                               options::OPT_ggdbN_Group)) {
> > +  if (Arg *A =
> > +          Args.getLastArg(options::OPT_gTune_Group, 
> > options::OPT_ggdbN_Group)) {
> >      if (A->getOption().matches(options::OPT_glldb))
> >        DebuggerTuning = llvm::DebuggerKind::LLDB;
> >      else if (A->getOption().matches(options::OPT_gsce))
> > @@ -4583,7 +4594,7 @@ void Clang::ConstructJob(Compilation &C,
> >
> >    // PS4 defaults to no column info
> >    if (Args.hasFlag(options::OPT_gcolumn_info, options::OPT_gno_column_info,
> > -                   /*Default=*/ !IsPS4CPU))
> > +                   /*Default=*/!IsPS4CPU))
> >      CmdArgs.push_back("-dwarf-column-info");
> >
> >    // FIXME: Move backend command line options to the module.
> > @@ -4637,9 +4648,10 @@ void Clang::ConstructJob(Compilation &C,
> >
> >    // CloudABI and WebAssembly use -ffunction-sections and -fdata-sections 
> > by
> >    // default.
> > -  bool UseSeparateSections = Triple.getOS() == llvm::Triple::CloudABI ||
> > -                             Triple.getArch() == llvm::Triple::wasm32 ||
> > -                             Triple.getArch() == llvm::Triple::wasm64;
> > +  bool UseSeparateSections =
> > +      EffectiveTriple.getOS() == llvm::Triple::CloudABI ||
> > +      EffectiveTriple.getArch() == llvm::Triple::wasm32 ||
> > +      EffectiveTriple.getArch() == llvm::Triple::wasm64;
> >
> >    if (Args.hasFlag(options::OPT_ffunction_sections,
> >                     options::OPT_fno_function_sections, 
> > UseSeparateSections)) {
> > @@ -5008,7 +5020,8 @@ void Clang::ConstructJob(Compilation &C,
> >    Args.AddLastArg(CmdArgs, options::OPT_fno_operator_names);
> >    // Emulated TLS is enabled by default on Android, and can be enabled 
> > manually
> >    // with -femulated-tls.
> > -  bool EmulatedTLSDefault = Triple.isAndroid() || 
> > Triple.isWindowsCygwinEnvironment();
> > +  bool EmulatedTLSDefault = EffectiveTriple.isAndroid() ||
> > +                            EffectiveTriple.isWindowsCygwinEnvironment();
> >    if (Args.hasFlag(options::OPT_femulated_tls, 
> > options::OPT_fno_emulated_tls,
> >                     EmulatedTLSDefault))
> >      CmdArgs.push_back("-femulated-tls");
> > @@ -5049,7 +5062,7 @@ void Clang::ConstructJob(Compilation &C,
> >    }
> >
> >    const SanitizerArgs &Sanitize = getToolChain().getSanitizerArgs();
> > -  Sanitize.addArgs(getToolChain(), Args, CmdArgs, InputType);
> > +  Sanitize.addArgs(getToolChain(), EffectiveTriple, Args, CmdArgs, 
> > InputType);
> >
> >    // Report an error for -faltivec on anything other than PowerPC.
> >    if (const Arg *A = Args.getLastArg(options::OPT_faltivec)) {
> > @@ -5191,9 +5204,9 @@ void Clang::ConstructJob(Compilation &C,
> >        CmdArgs.push_back("-backend-option");
> >        CmdArgs.push_back("-arm-no-restrict-it");
> >      }
> > -  } else if (Triple.isOSWindows() &&
> > -             (Triple.getArch() == llvm::Triple::arm ||
> > -              Triple.getArch() == llvm::Triple::thumb)) {
> > +  } else if (EffectiveTriple.isOSWindows() &&
> > +             (EffectiveTriple.getArch() == llvm::Triple::arm ||
> > +              EffectiveTriple.getArch() == llvm::Triple::thumb)) {
> >      // Windows on ARM expects restricted IT blocks
> >      CmdArgs.push_back("-backend-option");
> >      CmdArgs.push_back("-arm-restrict-it");
> > @@ -5546,7 +5559,7 @@ void Clang::ConstructJob(Compilation &C,
> >    if (Args.hasArg(options::OPT_fno_inline))
> >      CmdArgs.push_back("-fno-inline");
> >
> > -  if (Arg* InlineArg = Args.getLastArg(options::OPT_finline_functions,
> > +  if (Arg *InlineArg = Args.getLastArg(options::OPT_finline_functions,
> >                                         options::OPT_finline_hint_functions,
> >                                         options::OPT_fno_inline_functions))
> >      InlineArg->render(Args, CmdArgs);
> > @@ -5608,7 +5621,6 @@ void Clang::ConstructJob(Compilation &C,
> >                       options::OPT_fno_objc_arc_exceptions,
> >                       /*default*/ types::isCXX(InputType)))
> >        CmdArgs.push_back("-fobjc-arc-exceptions");
> > -
> >    }
> >
> >    // -fobjc-infer-related-result-type is the default, except in the 
> > Objective-C
> > @@ -5634,8 +5646,8 @@ void Clang::ConstructJob(Compilation &C,
> >
> >    // Pass down -fobjc-weak or -fno-objc-weak if present.
> >    if (types::isObjC(InputType)) {
> > -    auto WeakArg = Args.getLastArg(options::OPT_fobjc_weak,
> > -                                   options::OPT_fno_objc_weak);
> > +    auto WeakArg =
> > +        Args.getLastArg(options::OPT_fobjc_weak, 
> > options::OPT_fno_objc_weak);
> >      if (!WeakArg) {
> >        // nothing to do
> >      } else if (GCArg) {
> > @@ -5805,7 +5817,7 @@ void Clang::ConstructJob(Compilation &C,
> >        StringRef Value(A->getValue());
> >        if (Value != "always" && Value != "never" && Value != "auto")
> >          getToolChain().getDriver().Diag(diag::err_drv_clang_unsupported)
> > -              << ("-fdiagnostics-color=" + Value).str();
> > +            << ("-fdiagnostics-color=" + Value).str();
> >      }
> >      A->claim();
> >    }
> > @@ -6476,6 +6488,7 @@ void ClangAs::AddX86TargetArgs(const Arg
> >
> >  void ClangAs::ConstructJob(Compilation &C, const JobAction &JA,
> >                             const InputInfo &Output, const InputInfoList 
> > &Inputs,
> > +                           const llvm::Triple &EffectiveTriple,
> >                             const ArgList &Args,
> >                             const char *LinkingOutput) const {
> >    ArgStringList CmdArgs;
> > @@ -6483,9 +6496,7 @@ void ClangAs::ConstructJob(Compilation &
> >    assert(Inputs.size() == 1 && "Unexpected number of inputs.");
> >    const InputInfo &Input = Inputs[0];
> >
> > -  std::string TripleStr =
> > -      getToolChain().ComputeEffectiveClangTriple(Args, Input.getType());
> > -  const llvm::Triple Triple(TripleStr);
> > +  std::string TripleStr = EffectiveTriple.str();
> >
> >    // Don't warn about "clang -w -c foo.s"
> >    Args.ClaimAllArgs(options::OPT_w);
> > @@ -6514,14 +6525,14 @@ void ClangAs::ConstructJob(Compilation &
> >    CmdArgs.push_back(Clang::getBaseInputName(Args, Input));
> >
> >    // Add the target cpu
> > -  std::string CPU = getCPUName(Args, Triple, /*FromAs*/ true);
> > +  std::string CPU = getCPUName(Args, EffectiveTriple, /*FromAs*/ true);
> >    if (!CPU.empty()) {
> >      CmdArgs.push_back("-target-cpu");
> >      CmdArgs.push_back(Args.MakeArgString(CPU));
> >    }
> >
> >    // Add the target features
> > -  getTargetFeatures(getToolChain(), Triple, Args, CmdArgs, true);
> > +  getTargetFeatures(getToolChain(), EffectiveTriple, Args, CmdArgs, true);
> >
> >    // Ignore explicit -force_cpusubtype_ALL option.
> >    (void)Args.hasArg(options::OPT_force__cpusubtype__ALL);
> > @@ -6580,7 +6591,7 @@ void ClangAs::ConstructJob(Compilation &
> >    unsigned PICLevel;
> >    bool IsPIE;
> >    std::tie(RelocationModel, PICLevel, IsPIE) =
> > -      ParsePICArgs(getToolChain(), Triple, Args);
> > +      ParsePICArgs(getToolChain(), EffectiveTriple, Args);
> >
> >    const char *RMName = RelocationModelName(RelocationModel);
> >    if (RMName) {
> > @@ -6663,7 +6674,9 @@ void GnuTool::anchor() {}
> >
> >  void gcc::Common::ConstructJob(Compilation &C, const JobAction &JA,
> >                                 const InputInfo &Output,
> > -                               const InputInfoList &Inputs, const ArgList 
> > &Args,
> > +                               const InputInfoList &Inputs,
> > +                               const llvm::Triple &EffectiveTriple,
> > +                               const ArgList &Args,
> >                                 const char *LinkingOutput) const {
> >    const Driver &D = getToolChain().getDriver();
> >    ArgStringList CmdArgs;
> > @@ -6830,6 +6843,7 @@ void hexagon::Assembler::RenderExtraTool
> >  void hexagon::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
> >                                        const InputInfo &Output,
> >                                        const InputInfoList &Inputs,
> > +                                      const llvm::Triple &EffectiveTriple,
> >                                        const ArgList &Args,
> >                                        const char *LinkingOutput) const {
> >    claimNoWarnArgs(Args);
> > @@ -7073,6 +7087,7 @@ constructHexagonLinkArgs(Compilation &C,
> >  void hexagon::Linker::ConstructJob(Compilation &C, const JobAction &JA,
> >                                     const InputInfo &Output,
> >                                     const InputInfoList &Inputs,
> > +                                   const llvm::Triple &EffectiveTriple,
> >                                     const ArgList &Args,
> >                                     const char *LinkingOutput) const {
> >    auto &HTC = static_cast<const 
> > toolchains::HexagonToolChain&>(getToolChain());
> > @@ -7090,6 +7105,7 @@ void hexagon::Linker::ConstructJob(Compi
> >  void amdgpu::Linker::ConstructJob(Compilation &C, const JobAction &JA,
> >                                    const InputInfo &Output,
> >                                    const InputInfoList &Inputs,
> > +                                  const llvm::Triple &EffectiveTriple,
> >                                    const ArgList &Args,
> >                                    const char *LinkingOutput) const {
> >
> > @@ -7118,6 +7134,7 @@ bool wasm::Linker::hasIntegratedCPP() co
> >  void wasm::Linker::ConstructJob(Compilation &C, const JobAction &JA,
> >                                  const InputInfo &Output,
> >                                  const InputInfoList &Inputs,
> > +                                const llvm::Triple &EffectiveTriple,
> >                                  const ArgList &Args,
> >                                  const char *LinkingOutput) const {
> >
> > @@ -7193,7 +7210,8 @@ const std::string arm::getARMArch(String
> >      std::string CPU = llvm::sys::getHostCPUName();
> >      if (CPU != "generic") {
> >        // Translate the native cpu into the architecture suffix for that 
> > CPU.
> > -      StringRef Suffix = arm::getLLVMArchSuffixForARM(CPU, MArch, Triple);
> > +      StringRef Suffix =
> > +          arm::getLLVMArchSuffixForARM(CPU, MArch, Triple);
> >        // If there is no valid architecture suffix for this CPU we don't 
> > know how
> >        // to handle it, so return no architecture.
> >        if (Suffix.empty())
> > @@ -7453,6 +7471,7 @@ const char *Clang::getDependencyFileName
> >  void cloudabi::Linker::ConstructJob(Compilation &C, const JobAction &JA,
> >                                      const InputInfo &Output,
> >                                      const InputInfoList &Inputs,
> > +                                    const llvm::Triple &EffectiveTriple,
> >                                      const ArgList &Args,
> >                                      const char *LinkingOutput) const {
> >    const ToolChain &ToolChain = getToolChain();
> > @@ -7521,6 +7540,7 @@ void cloudabi::Linker::ConstructJob(Comp
> >  void darwin::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
> >                                       const InputInfo &Output,
> >                                       const InputInfoList &Inputs,
> > +                                     const llvm::Triple &EffectiveTriple,
> >                                       const ArgList &Args,
> >                                       const char *LinkingOutput) const {
> >    ArgStringList CmdArgs;
> > @@ -7818,6 +7838,7 @@ void darwin::Linker::AddLinkArgs(Compila
> >  void darwin::Linker::ConstructJob(Compilation &C, const JobAction &JA,
> >                                    const InputInfo &Output,
> >                                    const InputInfoList &Inputs,
> > +                                  const llvm::Triple &EffectiveTriple,
> >                                    const ArgList &Args,
> >                                    const char *LinkingOutput) const {
> >    assert(Output.getType() == types::TY_Image && "Invalid linker output 
> > type.");
> > @@ -7919,7 +7940,7 @@ void darwin::Linker::ConstructJob(Compil
> >    if (Args.hasArg(options::OPT_fnested_functions))
> >      CmdArgs.push_back("-allow_stack_execute");
> >
> > -  getMachOToolChain().addProfileRTLibs(Args, CmdArgs);
> > +  getMachOToolChain().addProfileRTLibs(EffectiveTriple, Args, CmdArgs);
> >
> >    if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
> >      if (getToolChain().getDriver().CCCIsCXX())
> > @@ -7928,7 +7949,7 @@ void darwin::Linker::ConstructJob(Compil
> >      // link_ssp spec is empty.
> >
> >      // Let the tool chain choose which runtime library to link.
> > -    getMachOToolChain().AddLinkRuntimeLibArgs(Args, CmdArgs);
> > +    getMachOToolChain().AddLinkRuntimeLibArgs(EffectiveTriple, Args, 
> > CmdArgs);
> >    }
> >
> >    if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
> > @@ -7961,6 +7982,7 @@ void darwin::Linker::ConstructJob(Compil
> >  void darwin::Lipo::ConstructJob(Compilation &C, const JobAction &JA,
> >                                  const InputInfo &Output,
> >                                  const InputInfoList &Inputs,
> > +                                const llvm::Triple &EffectiveTriple,
> >                                  const ArgList &Args,
> >                                  const char *LinkingOutput) const {
> >    ArgStringList CmdArgs;
> > @@ -7983,6 +8005,7 @@ void darwin::Lipo::ConstructJob(Compilat
> >  void darwin::Dsymutil::ConstructJob(Compilation &C, const JobAction &JA,
> >                                      const InputInfo &Output,
> >                                      const InputInfoList &Inputs,
> > +                                    const llvm::Triple &EffectiveTriple,
> >                                      const ArgList &Args,
> >                                      const char *LinkingOutput) const {
> >    ArgStringList CmdArgs;
> > @@ -8003,6 +8026,7 @@ void darwin::Dsymutil::ConstructJob(Comp
> >  void darwin::VerifyDebug::ConstructJob(Compilation &C, const JobAction &JA,
> >                                         const InputInfo &Output,
> >                                         const InputInfoList &Inputs,
> > +                                       const llvm::Triple &EffectiveTriple,
> >                                         const ArgList &Args,
> >                                         const char *LinkingOutput) const {
> >    ArgStringList CmdArgs;
> > @@ -8026,6 +8050,7 @@ void darwin::VerifyDebug::ConstructJob(C
> >  void solaris::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
> >                                        const InputInfo &Output,
> >                                        const InputInfoList &Inputs,
> > +                                      const llvm::Triple &EffectiveTriple,
> >                                        const ArgList &Args,
> >                                        const char *LinkingOutput) const {
> >    claimNoWarnArgs(Args);
> > @@ -8046,6 +8071,7 @@ void solaris::Assembler::ConstructJob(Co
> >  void solaris::Linker::ConstructJob(Compilation &C, const JobAction &JA,
> >                                     const InputInfo &Output,
> >                                     const InputInfoList &Inputs,
> > +                                   const llvm::Triple &EffectiveTriple,
> >                                     const ArgList &Args,
> >                                     const char *LinkingOutput) const {
> >    ArgStringList CmdArgs;
> > @@ -8115,7 +8141,7 @@ void solaris::Linker::ConstructJob(Compi
> >    }
> >    
> > CmdArgs.push_back(Args.MakeArgString(getToolChain().GetFilePath("crtn.o")));
> >
> > -  getToolChain().addProfileRTLibs(Args, CmdArgs);
> > +  getToolChain().addProfileRTLibs(EffectiveTriple, Args, CmdArgs);
> >
> >    const char *Exec = Args.MakeArgString(getToolChain().GetLinkerPath());
> >    C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, 
> > Inputs));
> > @@ -8124,6 +8150,7 @@ void solaris::Linker::ConstructJob(Compi
> >  void openbsd::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
> >                                        const InputInfo &Output,
> >                                        const InputInfoList &Inputs,
> > +                                      const llvm::Triple &EffectiveTriple,
> >                                        const ArgList &Args,
> >                                        const char *LinkingOutput) const {
> >    claimNoWarnArgs(Args);
> > @@ -8195,6 +8222,7 @@ void openbsd::Assembler::ConstructJob(Co
> >  void openbsd::Linker::ConstructJob(Compilation &C, const JobAction &JA,
> >                                     const InputInfo &Output,
> >                                     const InputInfoList &Inputs,
> > +                                   const llvm::Triple &EffectiveTriple,
> >                                     const ArgList &Args,
> >                                     const char *LinkingOutput) const {
> >    const Driver &D = getToolChain().getDriver();
> > @@ -8317,6 +8345,7 @@ void openbsd::Linker::ConstructJob(Compi
> >  void bitrig::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
> >                                       const InputInfo &Output,
> >                                       const InputInfoList &Inputs,
> > +                                     const llvm::Triple &EffectiveTriple,
> >                                       const ArgList &Args,
> >                                       const char *LinkingOutput) const {
> >    claimNoWarnArgs(Args);
> > @@ -8337,6 +8366,7 @@ void bitrig::Assembler::ConstructJob(Com
> >  void bitrig::Linker::ConstructJob(Compilation &C, const JobAction &JA,
> >                                    const InputInfo &Output,
> >                                    const InputInfoList &Inputs,
> > +                                  const llvm::Triple &EffectiveTriple,
> >                                    const ArgList &Args,
> >                                    const char *LinkingOutput) const {
> >    const Driver &D = getToolChain().getDriver();
> > @@ -8446,6 +8476,7 @@ void bitrig::Linker::ConstructJob(Compil
> >  void freebsd::Assembler::ConstructJob(Compilation &C, const JobAction &JA,

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