r373538 - [clang][ifs] Clang Interface Stubs ToolChain plumbing.

Nico Weber via cfe-commits cfe-commits at lists.llvm.org
Wed Oct 2 18:50:33 PDT 2019


Looks like it's passing on Linux now, but still failing on macOS:

AIL: Clang :: InterfaceStubs/driver-test.c (6172 of 16012)
******************** TEST 'Clang :: InterfaceStubs/driver-test.c' FAILED
********************
Script:
--
: 'RUN: at line 3';   /Users/thakis/src/llvm-project/out/gn/bin/clang
-target x86_64-unknown-linux-gnu -x c -o
/Users/thakis/src/llvm-project/out/gn/obj/clang/test/InterfaceStubs/Output/
driver-test.c.tmp1.so -emit-interface-stubs
/Users/thakis/src/llvm-project/clang/test/InterfaceStubs/driver-test.c
/Users/thakis/src/llvm-project/clang/test/InterfaceStubs/object.c
/Users/thakis/src/llvm-project/clang/test/InterfaceStubs/weak.cpp &&
 llvm-nm
/Users/thakis/src/llvm-project/out/gn/obj/clang/test/InterfaceStubs/Output/
driver-test.c.tmp1.so 2>&1 |
/Users/thakis/src/llvm-project/out/gn/bin/FileCheck
--check-prefix=CHECK-IFS
/Users/thakis/src/llvm-project/clang/test/InterfaceStubs/driver-test.c
: 'RUN: at line 6';   /Users/thakis/src/llvm-project/out/gn/bin/clang
-target x86_64-unknown-linux-gnu -x c -o
/Users/thakis/src/llvm-project/out/gn/obj/clang/test/InterfaceStubs/Output/
driver-test.c.tmp2.so -shared
/Users/thakis/src/llvm-project/clang/test/InterfaceStubs/driver-test.c
/Users/thakis/src/llvm-project/clang/test/InterfaceStubs/object.c
/Users/thakis/src/llvm-project/clang/test/InterfaceStubs/weak.cpp &&
 llvm-nm
/Users/thakis/src/llvm-project/out/gn/obj/clang/test/InterfaceStubs/Output/
driver-test.c.tmp2.so 2>&1 |
/Users/thakis/src/llvm-project/out/gn/bin/FileCheck --check-prefix=CHECK-SO
/Users/thakis/src/llvm-project/clang/test/InterfaceStubs/driver-test.c
--
Exit Code: 1

Command Output (stderr):
--
ld: unknown option: --eh-frame-hdr
clang: error: linker command failed with exit code 1 (use -v to see
invocation)

--

********************
Testing: 0 .. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90..
Testing Time: 162.42s
********************
Failing Tests (1):
    Clang :: InterfaceStubs/driver-test.c

On Wed, Oct 2, 2019 at 8:14 PM Puyan Lotfi <puyan at puyan.org> wrote:

> Looking at this. Sorry for this. I think either the test needs to be
> restricted for the x86 target or the llvm-ifs tool is not being built with
> the distribution.
> PL
>
>
> Sent with ProtonMail <https://protonmail.com> Secure Email.
>
> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
> On Wednesday, October 2, 2019 7:36 PM, Nico Weber <thakis at chromium.org>
> wrote:
>
> Looks like this broke a bunch of tests:
>
>
> http://lab.llvm.org:8011/builders/clang-cuda-build/builds/37720/steps/ninja%20check%201/logs/FAIL%3A%20Clang%3A%3Aobject.cpp
>
> http://lab.llvm.org:8011/builders/clang-cuda-build/builds/37720/steps/ninja%20check%201/logs/FAIL%3A%20Clang%3A%3Adriver-test.c
>
> If it takes a while to fix, please revert and investigate async.
>
> On Wed, Oct 2, 2019 at 6:47 PM Puyan Lotfi via cfe-commits <
> cfe-commits at lists.llvm.org> wrote:
>
>> Author: zer0
>> Date: Wed Oct  2 15:50:07 2019
>> New Revision: 373538
>>
>> URL: http://llvm.org/viewvc/llvm-project?rev=373538&view=rev
>> Log:
>> [clang][ifs] Clang Interface Stubs ToolChain plumbing.
>>
>> This patch enables end to end support for generating ELF interface stubs
>> directly from clang. Now the following:
>>
>> clang -emit-interface-stubs -o libfoo.so a.cpp b.cpp c.cpp
>>
>> will product an ELF binary with visible symbols populated. Visibility
>> attributes
>> and -fvisibility can be used to control what gets populated.
>>
>> * Adding ToolChain support for clang Driver IFS Merge Phase
>> * Implementing a default InterfaceStubs Merge clang Tool, used by
>> ToolChain
>> * Adds support for the clang Driver to involve llvm-ifs on ifs files.
>> * Adds -emit-merged-ifs flag, to tell llvm-ifs to emit a merged ifs text
>> file
>>   instead of the final object format (normally ELF)
>>
>>
>> Differential Revision: https://reviews.llvm.org/D63978
>>
>> Added:
>>     cfe/trunk/lib/Driver/ToolChains/InterfaceStubs.cpp
>>     cfe/trunk/lib/Driver/ToolChains/InterfaceStubs.h
>>     cfe/trunk/test/InterfaceStubs/conflict-type.ifs
>>     cfe/trunk/test/InterfaceStubs/driver-test.c
>>     cfe/trunk/test/InterfaceStubs/func.ifs
>>     cfe/trunk/test/InterfaceStubs/merge-conflict-test.c
>>     cfe/trunk/test/InterfaceStubs/object-double.c
>>     cfe/trunk/test/InterfaceStubs/object-float.c
>>     cfe/trunk/test/InterfaceStubs/object.c
>>     cfe/trunk/test/InterfaceStubs/object.ifs
>> Modified:
>>     cfe/trunk/include/clang/Driver/Action.h
>>     cfe/trunk/include/clang/Driver/Options.td
>>     cfe/trunk/include/clang/Driver/Phases.h
>>     cfe/trunk/include/clang/Driver/ToolChain.h
>>     cfe/trunk/include/clang/Driver/Types.def
>>     cfe/trunk/lib/Driver/Action.cpp
>>     cfe/trunk/lib/Driver/CMakeLists.txt
>>     cfe/trunk/lib/Driver/Driver.cpp
>>     cfe/trunk/lib/Driver/Phases.cpp
>>     cfe/trunk/lib/Driver/ToolChain.cpp
>>     cfe/trunk/lib/Driver/ToolChains/Clang.cpp
>>     cfe/trunk/lib/Driver/Types.cpp
>>     cfe/trunk/lib/Frontend/CompilerInvocation.cpp
>>     cfe/trunk/test/InterfaceStubs/bad-format.cpp
>>     cfe/trunk/test/InterfaceStubs/class-template-specialization.cpp
>>     cfe/trunk/test/InterfaceStubs/externstatic.c
>>     cfe/trunk/test/InterfaceStubs/function-template-specialization.cpp
>>     cfe/trunk/test/InterfaceStubs/inline.c
>>     cfe/trunk/test/InterfaceStubs/template-namespace-function.cpp
>>     cfe/trunk/test/InterfaceStubs/weak.cpp
>>     cfe/trunk/test/lit.cfg.py
>>
>> Modified: cfe/trunk/include/clang/Driver/Action.h
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/Action.h?rev=373538&r1=373537&r2=373538&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/include/clang/Driver/Action.h (original)
>> +++ cfe/trunk/include/clang/Driver/Action.h Wed Oct  2 15:50:07 2019
>> @@ -65,6 +65,7 @@ public:
>>      BackendJobClass,
>>      AssembleJobClass,
>>      LinkJobClass,
>> +    IfsMergeJobClass,
>>      LipoJobClass,
>>      DsymutilJobClass,
>>      VerifyDebugInfoJobClass,
>> @@ -485,6 +486,17 @@ public:
>>    }
>>  };
>>
>> +class IfsMergeJobAction : public JobAction {
>> +  void anchor() override;
>> +
>> +public:
>> +  IfsMergeJobAction(ActionList &Inputs, types::ID Type);
>> +
>> +  static bool classof(const Action *A) {
>> +    return A->getKind() == IfsMergeJobClass;
>> +  }
>> +};
>> +
>>  class LinkJobAction : public JobAction {
>>    void anchor() override;
>>
>>
>> Modified: cfe/trunk/include/clang/Driver/Options.td
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/Options.td?rev=373538&r1=373537&r2=373538&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/include/clang/Driver/Options.td (original)
>> +++ cfe/trunk/include/clang/Driver/Options.td Wed Oct  2 15:50:07 2019
>> @@ -633,6 +633,9 @@ def emit_llvm : Flag<["-"], "emit-llvm">
>>    HelpText<"Use the LLVM representation for assembler and object files">;
>>  def emit_iterface_stubs : Flag<["-"], "emit-interface-stubs">,
>> Flags<[CC1Option]>, Group<Action_Group>,
>>    HelpText<"Generate Inteface Stub Files.">;
>> +def emit_merged_ifs : Flag<["-"], "emit-merged-ifs">,
>> +  Flags<[CC1Option]>, Group<Action_Group>,
>> +  HelpText<"Generate Interface Stub Files, emit merged text not
>> binary.">;
>>  def iterface_stub_version_EQ : JoinedOrSeparate<["-"],
>> "interface-stub-version=">, Flags<[CC1Option]>;
>>  def exported__symbols__list : Separate<["-"], "exported_symbols_list">;
>>  def e : JoinedOrSeparate<["-"], "e">, Group<Link_Group>;
>>
>> Modified: cfe/trunk/include/clang/Driver/Phases.h
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/Phases.h?rev=373538&r1=373537&r2=373538&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/include/clang/Driver/Phases.h (original)
>> +++ cfe/trunk/include/clang/Driver/Phases.h Wed Oct  2 15:50:07 2019
>> @@ -20,7 +20,8 @@ namespace phases {
>>      Compile,
>>      Backend,
>>      Assemble,
>> -    Link
>> +    Link,
>> +    IfsMerge,
>>    };
>>
>>    enum {
>>
>> Modified: cfe/trunk/include/clang/Driver/ToolChain.h
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/ToolChain.h?rev=373538&r1=373537&r2=373538&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/include/clang/Driver/ToolChain.h (original)
>> +++ cfe/trunk/include/clang/Driver/ToolChain.h Wed Oct  2 15:50:07 2019
>> @@ -136,11 +136,13 @@ private:
>>    mutable std::unique_ptr<Tool> Clang;
>>    mutable std::unique_ptr<Tool> Assemble;
>>    mutable std::unique_ptr<Tool> Link;
>> +  mutable std::unique_ptr<Tool> IfsMerge;
>>    mutable std::unique_ptr<Tool> OffloadBundler;
>>
>>    Tool *getClang() const;
>>    Tool *getAssemble() const;
>>    Tool *getLink() const;
>> +  Tool *getIfsMerge() const;
>>    Tool *getClangAs() const;
>>    Tool *getOffloadBundler() const;
>>
>>
>> Modified: cfe/trunk/include/clang/Driver/Types.def
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/Types.def?rev=373538&r1=373537&r2=373538&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/include/clang/Driver/Types.def (original)
>> +++ cfe/trunk/include/clang/Driver/Types.def Wed Oct  2 15:50:07 2019
>> @@ -84,7 +84,8 @@ TYPE("lto-bc",                   LTO_BC,
>>
>>  // Misc.
>>  TYPE("ast",                      AST,          INVALID,         "ast",
>>   phases::Compile, phases::Backend, phases::Assemble, phases::Link)
>> -TYPE("ifs",                      IFS,          INVALID,         "ifs",
>>   phases::Compile, phases::Backend, phases::Assemble, phases::Link)
>> +TYPE("ifs",                      IFS,          INVALID,         "ifs",
>>   phases::IfsMerge)
>> +TYPE("ifs-cpp",                  IFS_CPP,      INVALID,         "ifs",
>>   phases::Compile, phases::IfsMerge)
>>  TYPE("pcm",                      ModuleFile,   INVALID,         "pcm",
>>   phases::Compile, phases::Backend, phases::Assemble, phases::Link)
>>  TYPE("plist",                    Plist,        INVALID,
>>  "plist",  phases::Compile, phases::Backend, phases::Assemble, phases::Link)
>>  TYPE("rewritten-objc",           RewrittenObjC,INVALID,         "cpp",
>>   phases::Compile, phases::Backend, phases::Assemble, phases::Link)
>>
>> Modified: cfe/trunk/lib/Driver/Action.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/Action.cpp?rev=373538&r1=373537&r2=373538&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/lib/Driver/Action.cpp (original)
>> +++ cfe/trunk/lib/Driver/Action.cpp Wed Oct  2 15:50:07 2019
>> @@ -31,6 +31,7 @@ const char *Action::getClassName(ActionC
>>    case CompileJobClass: return "compiler";
>>    case BackendJobClass: return "backend";
>>    case AssembleJobClass: return "assembler";
>> +  case IfsMergeJobClass: return "interface-stub-merger";
>>    case LinkJobClass: return "linker";
>>    case LipoJobClass: return "lipo";
>>    case DsymutilJobClass: return "dsymutil";
>> @@ -357,6 +358,11 @@ void AssembleJobAction::anchor() {}
>>  AssembleJobAction::AssembleJobAction(Action *Input, types::ID OutputType)
>>      : JobAction(AssembleJobClass, Input, OutputType) {}
>>
>> +void IfsMergeJobAction::anchor() {}
>> +
>> +IfsMergeJobAction::IfsMergeJobAction(ActionList &Inputs, types::ID Type)
>> +    : JobAction(IfsMergeJobClass, Inputs, Type) {}
>> +
>>  void LinkJobAction::anchor() {}
>>
>>  LinkJobAction::LinkJobAction(ActionList &Inputs, types::ID Type)
>>
>> Modified: cfe/trunk/lib/Driver/CMakeLists.txt
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/CMakeLists.txt?rev=373538&r1=373537&r2=373538&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/lib/Driver/CMakeLists.txt (original)
>> +++ cfe/trunk/lib/Driver/CMakeLists.txt Wed Oct  2 15:50:07 2019
>> @@ -66,6 +66,7 @@ add_clang_library(clangDriver
>>    ToolChains/WebAssembly.cpp
>>    ToolChains/XCore.cpp
>>    ToolChains/PPCLinux.cpp
>> +  ToolChains/InterfaceStubs.cpp
>>    Types.cpp
>>    XRayArgs.cpp
>>
>>
>> Modified: cfe/trunk/lib/Driver/Driver.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/Driver.cpp?rev=373538&r1=373537&r2=373538&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/lib/Driver/Driver.cpp (original)
>> +++ cfe/trunk/lib/Driver/Driver.cpp Wed Oct  2 15:50:07 2019
>> @@ -274,11 +274,11 @@ phases::ID Driver::getFinalPhase(const D
>>        (PhaseArg = DAL.getLastArg(options::OPT__SLASH_P))) {
>>      FinalPhase = phases::Preprocess;
>>
>> -    // --precompile only runs up to precompilation.
>> +  // --precompile only runs up to precompilation.
>>    } else if ((PhaseArg = DAL.getLastArg(options::OPT__precompile))) {
>>      FinalPhase = phases::Precompile;
>>
>> -    // -{fsyntax-only,-analyze,emit-ast} only run up to the compiler.
>> +  // -{fsyntax-only,-analyze,emit-ast} only run up to the compiler.
>>    } else if ((PhaseArg = DAL.getLastArg(options::OPT_fsyntax_only)) ||
>>               (PhaseArg =
>> DAL.getLastArg(options::OPT_print_supported_cpus)) ||
>>               (PhaseArg = DAL.getLastArg(options::OPT_module_file_info))
>> ||
>> @@ -286,20 +286,23 @@ phases::ID Driver::getFinalPhase(const D
>>               (PhaseArg = DAL.getLastArg(options::OPT_rewrite_objc)) ||
>>               (PhaseArg =
>> DAL.getLastArg(options::OPT_rewrite_legacy_objc)) ||
>>               (PhaseArg = DAL.getLastArg(options::OPT__migrate)) ||
>> -             (PhaseArg =
>> DAL.getLastArg(options::OPT_emit_iterface_stubs)) ||
>>               (PhaseArg = DAL.getLastArg(options::OPT__analyze)) ||
>>               (PhaseArg = DAL.getLastArg(options::OPT_emit_ast))) {
>>      FinalPhase = phases::Compile;
>>
>> -    // -S only runs up to the backend.
>> +  // clang interface stubs
>> +  } else if ((PhaseArg =
>> DAL.getLastArg(options::OPT_emit_iterface_stubs))) {
>> +    FinalPhase = phases::IfsMerge;
>> +
>> +  // -S only runs up to the backend.
>>    } else if ((PhaseArg = DAL.getLastArg(options::OPT_S))) {
>>      FinalPhase = phases::Backend;
>>
>> -    // -c compilation only runs up to the assembler.
>> +  // -c compilation only runs up to the assembler.
>>    } else if ((PhaseArg = DAL.getLastArg(options::OPT_c))) {
>>      FinalPhase = phases::Assemble;
>>
>> -    // Otherwise do everything.
>> +  // Otherwise do everything.
>>    } else
>>      FinalPhase = phases::Link;
>>
>> @@ -3323,6 +3326,7 @@ void Driver::BuildActions(Compilation &C
>>    // Construct the actions to perform.
>>    HeaderModulePrecompileJobAction *HeaderModuleAction = nullptr;
>>    ActionList LinkerInputs;
>> +  ActionList MergerInputs;
>>
>>    for (auto &I : Inputs) {
>>      types::ID InputType = I.first;
>> @@ -3360,6 +3364,17 @@ void Driver::BuildActions(Compilation &C
>>          break;
>>        }
>>
>> +      // TODO: Consider removing this because the merged may not end up
>> being
>> +      // the final Phase in the pipeline. Perhaps the merged could just
>> merge
>> +      // and then pass an artifact of some sort to the Link Phase.
>> +      // Queue merger inputs.
>> +      if (Phase == phases::IfsMerge) {
>> +        assert(Phase == PL.back() && "merging must be final compilation
>> step.");
>> +        MergerInputs.push_back(Current);
>> +        Current = nullptr;
>> +        break;
>> +      }
>> +
>>        // Each precompiled header file after a module file action is a
>> module
>>        // header of that same module file, rather than being compiled to a
>>        // separate PCH.
>> @@ -3409,6 +3424,11 @@ void Driver::BuildActions(Compilation &C
>>      Actions.push_back(LA);
>>    }
>>
>> +  // Add an interface stubs merge action if necessary.
>> +  if (!MergerInputs.empty())
>> +    Actions.push_back(
>> +        C.MakeAction<IfsMergeJobAction>(MergerInputs, types::TY_Image));
>> +
>>    // If --print-supported-cpus, -mcpu=? or -mtune=? is specified, build
>> a custom
>>    // Compile phase that prints out supported cpu models and quits.
>>    if (Arg *A = Args.getLastArg(options::OPT_print_supported_cpus)) {
>> @@ -3445,6 +3465,8 @@ Action *Driver::ConstructPhaseAction(
>>    switch (Phase) {
>>    case phases::Link:
>>      llvm_unreachable("link action invalid here.");
>> +  case phases::IfsMerge:
>> +    llvm_unreachable("ifsmerge action invalid here.");
>>    case phases::Preprocess: {
>>      types::ID OutputTy;
>>      // -M and -MM specify the dependency file name by altering the
>> output type,
>> @@ -3509,7 +3531,7 @@ Action *Driver::ConstructPhaseAction(
>>      if (Args.hasArg(options::OPT_verify_pch))
>>        return C.MakeAction<VerifyPCHJobAction>(Input, types::TY_Nothing);
>>      if (Args.hasArg(options::OPT_emit_iterface_stubs))
>> -      return C.MakeAction<CompileJobAction>(Input, types::TY_IFS);
>> +      return C.MakeAction<CompileJobAction>(Input, types::TY_IFS_CPP);
>>      return C.MakeAction<CompileJobAction>(Input, types::TY_LLVM_BC);
>>    }
>>    case phases::Backend: {
>>
>> Modified: cfe/trunk/lib/Driver/Phases.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/Phases.cpp?rev=373538&r1=373537&r2=373538&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/lib/Driver/Phases.cpp (original)
>> +++ cfe/trunk/lib/Driver/Phases.cpp Wed Oct  2 15:50:07 2019
>> @@ -20,6 +20,7 @@ const char *phases::getPhaseName(ID Id)
>>    case Backend: return "backend";
>>    case Assemble: return "assembler";
>>    case Link: return "linker";
>> +  case IfsMerge: return "ifsmerger";
>>    }
>>
>>    llvm_unreachable("Invalid phase id.");
>>
>> Modified: cfe/trunk/lib/Driver/ToolChain.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/ToolChain.cpp?rev=373538&r1=373537&r2=373538&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/lib/Driver/ToolChain.cpp (original)
>> +++ cfe/trunk/lib/Driver/ToolChain.cpp Wed Oct  2 15:50:07 2019
>> @@ -10,6 +10,7 @@
>>  #include "InputInfo.h"
>>  #include "ToolChains/Arch/ARM.h"
>>  #include "ToolChains/Clang.h"
>> +#include "ToolChains/InterfaceStubs.h"
>>  #include "clang/Basic/ObjCRuntime.h"
>>  #include "clang/Basic/Sanitizers.h"
>>  #include "clang/Config/config.h"
>> @@ -279,6 +280,12 @@ Tool *ToolChain::getLink() const {
>>    return Link.get();
>>  }
>>
>> +Tool *ToolChain::getIfsMerge() const {
>> +  if (!IfsMerge)
>> +    IfsMerge.reset(new tools::ifstool::Merger(*this));
>> +  return IfsMerge.get();
>> +}
>> +
>>  Tool *ToolChain::getOffloadBundler() const {
>>    if (!OffloadBundler)
>>      OffloadBundler.reset(new tools::OffloadBundler(*this));
>> @@ -290,6 +297,9 @@ Tool *ToolChain::getTool(Action::ActionC
>>    case Action::AssembleJobClass:
>>      return getAssemble();
>>
>> +  case Action::IfsMergeJobClass:
>> +    return getIfsMerge();
>> +
>>    case Action::LinkJobClass:
>>      return getLink();
>>
>>
>> Modified: cfe/trunk/lib/Driver/ToolChains/Clang.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/ToolChains/Clang.cpp?rev=373538&r1=373537&r2=373538&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/lib/Driver/ToolChains/Clang.cpp (original)
>> +++ cfe/trunk/lib/Driver/ToolChains/Clang.cpp Wed Oct  2 15:50:07 2019
>> @@ -3683,32 +3683,15 @@ void Clang::ConstructJob(Compilation &C,
>>      } else if (JA.getType() == types::TY_LLVM_BC ||
>>                 JA.getType() == types::TY_LTO_BC) {
>>        CmdArgs.push_back("-emit-llvm-bc");
>> -    } else if (JA.getType() == types::TY_IFS) {
>> +    } else if (JA.getType() == types::TY_IFS ||
>> +               JA.getType() == types::TY_IFS_CPP) {
>>        StringRef ArgStr =
>>            Args.hasArg(options::OPT_iterface_stub_version_EQ)
>>                ?
>> Args.getLastArgValue(options::OPT_iterface_stub_version_EQ)
>> -              : "";
>> -      StringRef StubFormat =
>> -          llvm::StringSwitch<StringRef>(ArgStr)
>> -              .Case("experimental-ifs-v1", "experimental-ifs-v1")
>> -              .Default("");
>> -
>> -      if (StubFormat.empty()) {
>> -        std::string ErrorMessage =
>> -            "Invalid interface stub format: " + ArgStr.str() +
>> -            ((ArgStr == "experimental-yaml-elf-v1" ||
>> -              ArgStr == "experimental-tapi-elf-v1")
>> -                 ? " is deprecated."
>> -                 : ".");
>> -        D.Diag(diag::err_drv_invalid_value)
>> -            << "Must specify a valid interface stub format type, ie: "
>> -               "-interface-stub-version=experimental-ifs-v1"
>> -            << ErrorMessage;
>> -      }
>> -
>> +              : "experimental-ifs-v1";
>>        CmdArgs.push_back("-emit-interface-stubs");
>>        CmdArgs.push_back(
>> -          Args.MakeArgString(Twine("-interface-stub-version=") +
>> StubFormat));
>> +          Args.MakeArgString(Twine("-interface-stub-version=") +
>> ArgStr.str()));
>>      } else if (JA.getType() == types::TY_PP_Asm) {
>>        CmdArgs.push_back("-S");
>>      } else if (JA.getType() == types::TY_AST) {
>>
>> Added: cfe/trunk/lib/Driver/ToolChains/InterfaceStubs.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/ToolChains/InterfaceStubs.cpp?rev=373538&view=auto
>>
>> ==============================================================================
>> --- cfe/trunk/lib/Driver/ToolChains/InterfaceStubs.cpp (added)
>> +++ cfe/trunk/lib/Driver/ToolChains/InterfaceStubs.cpp Wed Oct  2
>> 15:50:07 2019
>> @@ -0,0 +1,37 @@
>> +//===---  InterfaceStubs.cpp - Base InterfaceStubs Implementations C++
>> ---===//
>> +//
>> +// Part of the LLVM Project, under the Apache License v2.0 with LLVM
>> Exceptions.
>> +// See https://llvm.org/LICENSE.txt for license information.
>> +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
>> +//
>>
>> +//===----------------------------------------------------------------------===//
>> +
>> +#include "InterfaceStubs.h"
>> +#include "CommonArgs.h"
>> +#include "clang/Driver/Compilation.h"
>> +
>> +namespace clang {
>> +namespace driver {
>> +namespace tools {
>> +namespace ifstool {
>> +void Merger::ConstructJob(Compilation &C, const JobAction &JA,
>> +                          const InputInfo &Output, const InputInfoList
>> &Inputs,
>> +                          const llvm::opt::ArgList &Args,
>> +                          const char *LinkingOutput) const {
>> +  std::string Merger = getToolChain().GetProgramPath(getShortName());
>> +  llvm::opt::ArgStringList CmdArgs;
>> +  CmdArgs.push_back("-action");
>> +  CmdArgs.push_back(Args.getLastArg(options::OPT_emit_merged_ifs)
>> +                        ? "write-ifs"
>> +                        : "write-bin");
>> +  CmdArgs.push_back("-o");
>> +  CmdArgs.push_back(Output.getFilename());
>> +  for (const auto &Input : Inputs)
>> +    CmdArgs.push_back(Input.getFilename());
>> +  C.addCommand(std::make_unique<Command>(JA, *this,
>> Args.MakeArgString(Merger),
>> +                                         CmdArgs, Inputs));
>> +}
>> +} // namespace ifstool
>> +} // namespace tools
>> +} // namespace driver
>> +} // namespace clang
>>
>> Added: cfe/trunk/lib/Driver/ToolChains/InterfaceStubs.h
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/ToolChains/InterfaceStubs.h?rev=373538&view=auto
>>
>> ==============================================================================
>> --- cfe/trunk/lib/Driver/ToolChains/InterfaceStubs.h (added)
>> +++ cfe/trunk/lib/Driver/ToolChains/InterfaceStubs.h Wed Oct  2 15:50:07
>> 2019
>> @@ -0,0 +1,36 @@
>> +//===---  InterfaceStubs.cpp - Base InterfaceStubs Implementations C++
>> ---===//
>> +//
>> +// Part of the LLVM Project, under the Apache License v2.0 with LLVM
>> Exceptions.
>> +// See https://llvm.org/LICENSE.txt for license information.
>> +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
>> +//
>>
>> +//===----------------------------------------------------------------------===//
>> +
>> +#ifndef LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_IFS_H
>> +#define LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_IFS_H
>> +
>> +#include "clang/Driver/Tool.h"
>> +#include "clang/Driver/ToolChain.h"
>> +
>> +namespace clang {
>> +namespace driver {
>> +namespace tools {
>> +namespace ifstool {
>> +class LLVM_LIBRARY_VISIBILITY Merger : public Tool {
>> +public:
>> +  Merger(const ToolChain &TC) : Tool("IFS::Merger", "llvm-ifs", TC) {}
>> +
>> +  bool hasIntegratedCPP() const override { return false; }
>> +  bool isLinkJob() const override { return false; }
>> +
>> +  void ConstructJob(Compilation &C, const JobAction &JA,
>> +                    const InputInfo &Output, const InputInfoList &Inputs,
>> +                    const llvm::opt::ArgList &TCArgs,
>> +                    const char *LinkingOutput) const override;
>> +};
>> +} // end namespace ifstool
>> +} // end namespace tools
>> +} // end namespace driver
>> +} // end namespace clang
>> +
>> +#endif // LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_IFS_H
>>
>> Modified: cfe/trunk/lib/Driver/Types.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/Types.cpp?rev=373538&r1=373537&r2=373538&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/lib/Driver/Types.cpp (original)
>> +++ cfe/trunk/lib/Driver/Types.cpp Wed Oct  2 15:50:07 2019
>> @@ -269,6 +269,7 @@ types::ID types::lookupTypeForExtension(
>>             .Case("lib", TY_Object)
>>             .Case("mii", TY_PP_ObjCXX)
>>             .Case("obj", TY_Object)
>> +           .Case("ifs", TY_IFS)
>>             .Case("pch", TY_PCH)
>>             .Case("pcm", TY_ModuleFile)
>>             .Case("c++m", TY_CXXModule)
>> @@ -319,6 +320,22 @@ void types::getCompilationPhases(const c
>>      llvm::copy_if(PhaseList, std::back_inserter(P),
>>                    [](phases::ID Phase) { return Phase <=
>> phases::Precompile; });
>>
>> +  // Treat Interface Stubs like its own compilation mode.
>> +  else if (DAL.getLastArg(options::OPT_emit_iterface_stubs)) {
>> +    llvm::SmallVector<phases::ID, phases::MaxNumberOfPhases>
>> IfsModePhaseList;
>> +    llvm::SmallVector<phases::ID, phases::MaxNumberOfPhases> &PL =
>> PhaseList;
>> +    phases::ID LastPhase = phases::IfsMerge;
>> +    if (Id != types::TY_IFS) {
>> +      if (DAL.hasArg(options::OPT_c))
>> +        LastPhase = phases::Compile;
>> +      PL = IfsModePhaseList;
>> +      types::getCompilationPhases(types::TY_IFS_CPP, PL);
>> +    }
>> +    llvm::copy_if(PL, std::back_inserter(P), [&](phases::ID Phase) {
>> +      return Phase <= LastPhase;
>> +    });
>> +  }
>> +
>>    // -{fsyntax-only,-analyze,emit-ast} only run up to the compiler.
>>    else if (DAL.getLastArg(options::OPT_fsyntax_only) ||
>>             DAL.getLastArg(options::OPT_print_supported_cpus) ||
>> @@ -327,7 +344,6 @@ void types::getCompilationPhases(const c
>>             DAL.getLastArg(options::OPT_rewrite_objc) ||
>>             DAL.getLastArg(options::OPT_rewrite_legacy_objc) ||
>>             DAL.getLastArg(options::OPT__migrate) ||
>> -           DAL.getLastArg(options::OPT_emit_iterface_stubs) ||
>>             DAL.getLastArg(options::OPT__analyze) ||
>>             DAL.getLastArg(options::OPT_emit_ast))
>>      llvm::copy_if(PhaseList, std::back_inserter(P),
>>
>> Modified: cfe/trunk/lib/Frontend/CompilerInvocation.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Frontend/CompilerInvocation.cpp?rev=373538&r1=373537&r2=373538&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/lib/Frontend/CompilerInvocation.cpp (original)
>> +++ cfe/trunk/lib/Frontend/CompilerInvocation.cpp Wed Oct  2 15:50:07 2019
>> @@ -1734,24 +1734,25 @@ static InputKind ParseFrontendArgs(Front
>>        StringRef ArgStr =
>>            Args.hasArg(OPT_iterface_stub_version_EQ)
>>                ? Args.getLastArgValue(OPT_iterface_stub_version_EQ)
>> -              : "";
>> -      llvm::Optional<frontend::ActionKind> ProgramAction =
>> -
>> llvm::StringSwitch<llvm::Optional<frontend::ActionKind>>(ArgStr)
>> -              .Case("experimental-ifs-v1",
>> frontend::GenerateInterfaceIfsExpV1)
>> -              .Default(llvm::None);
>> -      if (!ProgramAction) {
>> +              : "experimental-ifs-v1";
>> +      if (ArgStr == "experimental-yaml-elf-v1" ||
>> +          ArgStr == "experimental-tapi-elf-v1") {
>>          std::string ErrorMessage =
>>              "Invalid interface stub format: " + ArgStr.str() +
>> -            ((ArgStr == "experimental-yaml-elf-v1" ||
>> -              ArgStr == "experimental-tapi-elf-v1")
>> -                 ? " is deprecated."
>> -                 : ".");
>> +            " is deprecated.";
>> +        Diags.Report(diag::err_drv_invalid_value)
>> +            << "Must specify a valid interface stub format type, ie: "
>> +               "-interface-stub-version=experimental-ifs-v1"
>> +            << ErrorMessage;
>> +      } else if (ArgStr != "experimental-ifs-v1") {
>> +        std::string ErrorMessage =
>> +            "Invalid interface stub format: " + ArgStr.str() + ".";
>>          Diags.Report(diag::err_drv_invalid_value)
>>              << "Must specify a valid interface stub format type, ie: "
>>                 "-interface-stub-version=experimental-ifs-v1"
>>              << ErrorMessage;
>>        } else {
>> -        Opts.ProgramAction = *ProgramAction;
>> +        Opts.ProgramAction = frontend::GenerateInterfaceIfsExpV1;
>>        }
>>        break;
>>      }
>>
>> Modified: cfe/trunk/test/InterfaceStubs/bad-format.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/InterfaceStubs/bad-format.cpp?rev=373538&r1=373537&r2=373538&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/test/InterfaceStubs/bad-format.cpp (original)
>> +++ cfe/trunk/test/InterfaceStubs/bad-format.cpp Wed Oct  2 15:50:07 2019
>> @@ -1,28 +1,25 @@
>> -// REQUIRES: x86-registered-target
>> -// RUN: not %clang -target x86_64-linux-gnu -o - -emit-interface-stubs \
>> -// RUN: -interface-stub-version=bar-format %s 2>&1 | FileCheck %s
>> +// RUN: not %clang -emit-interface-stubs
>> -interface-stub-version=bad-format %s 2>&1 | \
>> +// RUN: FileCheck %s
>>
>> -// RUN: not %clang -target x86_64-linux-gnu -o - -emit-interface-stubs \
>> -// RUN: -interface-stub-version=experimental-tapi-elf-v1 %s 2>&1 | \
>> +// RUN: not %clang -emit-interface-stubs
>> -interface-stub-version=experimental-tapi-elf-v1 %s 2>&1 | \
>>  // RUN: FileCheck -check-prefix=CHECK-TAPI-DEPRECATED %s
>>
>> -// RUN: not %clang -target x86_64-linux-gnu -o - -emit-interface-stubs \
>> -// RUN: -interface-stub-version=experimental-yaml-elf-v1 %s 2>&1 | \
>> +// RUN: not %clang -emit-interface-stubs
>> -interface-stub-version=experimental-yaml-elf-v1 %s 2>&1 | \
>>  // RUN: FileCheck -check-prefix=CHECK-YAML-DEPRECATED %s
>>
>> -// RUN: not %clang_cc1 -target x86_64-linux-gnu -o -
>> -emit-interface-stubs \
>> -// RUN: -interface-stub-version=bar-format %s 2>&1 | FileCheck %s
>> +// RUN: not %clang -emit-interface-stubs
>> -interface-stub-version=bad-format %s 2>&1 | \
>> +// RUN: FileCheck %s
>>
>> -// RUN: not %clang_cc1 -target x86_64-linux-gnu -o -
>> -emit-interface-stubs \
>> +// RUN: not %clang -emit-interface-stubs \
>>  // RUN: -interface-stub-version=experimental-tapi-elf-v1 %s 2>&1 | \
>>  // RUN: FileCheck -check-prefix=CHECK-TAPI-DEPRECATED %s
>>
>> -// RUN: not %clang_cc1 -target x86_64-linux-gnu -o -
>> -emit-interface-stubs \
>> +// RUN: not %clang -emit-interface-stubs \
>>  // RUN: -interface-stub-version=experimental-yaml-elf-v1 %s 2>&1 | \
>>  // RUN: FileCheck -check-prefix=CHECK-YAML-DEPRECATED %s
>>
>>  // CHECK: error: invalid value
>> -// CHECK: 'Invalid interface stub format: bar-format.' in 'Must specify a
>> +// CHECK: 'Invalid interface stub format: bad-format.' in 'Must specify a
>>  // CHECK: valid interface stub format type, ie:
>>  // CHECK: -interface-stub-version=experimental-ifs-v1'
>>
>>
>> Modified: cfe/trunk/test/InterfaceStubs/class-template-specialization.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/InterfaceStubs/class-template-specialization.cpp?rev=373538&r1=373537&r2=373538&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/test/InterfaceStubs/class-template-specialization.cpp
>> (original)
>> +++ cfe/trunk/test/InterfaceStubs/class-template-specialization.cpp Wed
>> Oct  2 15:50:07 2019
>> @@ -1,9 +1,9 @@
>>  // REQUIRES: x86-registered-target
>> -// RUN: %clang -target x86_64-unknown-linux-gnu -o -
>> -emit-interface-stubs \
>> +// RUN: %clang -target x86_64-unknown-linux-gnu -o -
>> -emit-interface-stubs -emit-merged-ifs \
>>  // RUN: -interface-stub-version=experimental-ifs-v1 %s | \
>>  // RUN: FileCheck -check-prefix=CHECK-TAPI %s
>>
>> -// RUN: %clang -target x86_64-unknown-linux-gnu -o -
>> -emit-interface-stubs \
>> +// RUN: %clang -target x86_64-unknown-linux-gnu -o -
>> -emit-interface-stubs -emit-merged-ifs \
>>  // RUN: -interface-stub-version=experimental-ifs-v1 %s | \
>>  // RUN: FileCheck -check-prefix=CHECK-TAPI2 %s
>>  // RUN: %clang -target x86_64-unknown-linux-gnu -o - -c %s | \
>>
>> Added: cfe/trunk/test/InterfaceStubs/conflict-type.ifs
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/InterfaceStubs/conflict-type.ifs?rev=373538&view=auto
>>
>> ==============================================================================
>> --- cfe/trunk/test/InterfaceStubs/conflict-type.ifs (added)
>> +++ cfe/trunk/test/InterfaceStubs/conflict-type.ifs Wed Oct  2 15:50:07
>> 2019
>> @@ -0,0 +1,16 @@
>> +# RUN: not %clang -emit-merged-ifs -emit-interface-stubs -o - %s
>> %S/func.ifs 2>&1 | \
>> +# RUN: FileCheck %s --check-prefixes=CHECK-IFS
>> +
>> +# Here we are testing to see if two symbols with identical names will
>> fail to
>> +# merge in conflict due to mismatched types.
>> +# CHECK-IFS: error: Interface Stub: Type Mismatch for a.
>> +# CHECK-IFS-NEXT: Filename:
>> +# CHECK-IFS-NEXT: Type Values: Object Func
>> +
>> +--- !experimental-ifs-v1
>> +IfsVersion: 1.0
>> +Triple: x86_64-linux-gnu
>> +ObjectFileFormat: ELF
>> +Symbols:
>> +  a: { Type: Object, Size: 1 }
>> +...
>>
>> Added: cfe/trunk/test/InterfaceStubs/driver-test.c
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/InterfaceStubs/driver-test.c?rev=373538&view=auto
>>
>> ==============================================================================
>> --- cfe/trunk/test/InterfaceStubs/driver-test.c (added)
>> +++ cfe/trunk/test/InterfaceStubs/driver-test.c Wed Oct  2 15:50:07 2019
>> @@ -0,0 +1,12 @@
>> +// RUN: %clang -x c -o libfoo.so -emit-interface-stubs %s %S/object.c
>> %S/weak.cpp && \
>> +// RUN: llvm-nm libfoo.so 2>&1 | FileCheck %s
>> +
>> +// RUN: %clang -x c -o libfoo.so -shared %s %S/object.c %S/weak.cpp && \
>> +// RUN: llvm-nm libfoo.so 2>&1 | FileCheck %s
>> +
>> +// CHECK-DAG: data
>> +// CHECK-DAG: foo
>> +// CHECK-DAG: strongFunc
>> +// CHECK-DAG: weakFunc
>> +
>> +int foo(int bar) { return 42 + 1844; }
>> \ No newline at end of file
>>
>> Modified: cfe/trunk/test/InterfaceStubs/externstatic.c
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/InterfaceStubs/externstatic.c?rev=373538&r1=373537&r2=373538&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/test/InterfaceStubs/externstatic.c (original)
>> +++ cfe/trunk/test/InterfaceStubs/externstatic.c Wed Oct  2 15:50:07 2019
>> @@ -1,24 +1,20 @@
>> -// REQUIRES: x86-registered-target
>> -// RUN: %clang -DSTORAGE="extern" -target x86_64-unknown-linux-gnu -o - \
>> -// RUN: -emit-interface-stubs \
>> -// RUN: -interface-stub-version=experimental-ifs-v1 -std=c99 -xc %s | \
>> +// RUN: %clang -c -DSTORAGE="extern" -o - -emit-interface-stubs -std=c99
>> -xc %s | \
>>  // RUN: FileCheck -check-prefix=CHECK-EXTERN %s
>> -// RUN: %clang -DSTORAGE="extern" -target x86_64-linux-gnu -O0 -o - -c
>> -std=c99 \
>> +
>> +// RUN: %clang -DSTORAGE="extern" -O0 -o - -c -std=c99 \
>>  // RUN: -xc %s | llvm-nm - 2>&1 | FileCheck -check-prefix=CHECK-EXTERN %s
>>
>> -// RUN: %clang -DSTORAGE="extern" -target x86_64-unknown-linux-gnu -o - \
>> -// RUN: -emit-interface-stubs \
>> -// RUN: -interface-stub-version=experimental-ifs-v1 -std=c99 -xc %s | \
>> +// RUN: %clang -c -DSTORAGE="extern" -o - -emit-interface-stubs -std=c99
>> -xc %s | \
>> +// RUN: FileCheck -check-prefix=CHECK-EXTERN2 %s
>> +
>> +// RUN: %clang -DSTORAGE="extern" -O0 -o - -c -std=c99 -xc %s | llvm-nm
>> - 2>&1 | \
>>  // RUN: FileCheck -check-prefix=CHECK-EXTERN2 %s
>> -// RUN: %clang -DSTORAGE="extern" -target x86_64-linux-gnu -O0 -o - -c
>> -std=c99 \
>> -// RUN: -xc %s | llvm-nm - 2>&1 | FileCheck -check-prefix=CHECK-EXTERN2
>> %s
>>
>> -// RUN: %clang -DSTORAGE="static" -target x86_64-unknown-linux-gnu -o - \
>> -// RUN: -emit-interface-stubs \
>> -// RUN: -interface-stub-version=experimental-ifs-v1 -std=c99 -xc %s | \
>> +// RUN: %clang -c -DSTORAGE="static" -o - -emit-interface-stubs -std=c99
>> -xc %s | \
>> +// RUN: FileCheck -check-prefix=CHECK-STATIC %s
>> +
>> +// RUN: %clang -DSTORAGE="static" -O0 -o - -c -std=c99 -xc %s | llvm-nm
>> - 2>&1 | \
>>  // RUN: FileCheck -check-prefix=CHECK-STATIC %s
>> -// RUN: %clang -DSTORAGE="static" -target x86_64-linux-gnu -O0 -o - -c
>> -std=c99 \
>> -// RUN: -xc %s | llvm-nm - 2>&1 | FileCheck -check-prefix=CHECK-STATIC %s
>>
>>  // CHECK-EXTERN-NOT: foo
>>  // CHECK-STATIC-NOT: foo
>>
>> Added: cfe/trunk/test/InterfaceStubs/func.ifs
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/InterfaceStubs/func.ifs?rev=373538&view=auto
>>
>> ==============================================================================
>> --- cfe/trunk/test/InterfaceStubs/func.ifs (added)
>> +++ cfe/trunk/test/InterfaceStubs/func.ifs Wed Oct  2 15:50:07 2019
>> @@ -0,0 +1,40 @@
>> +# RUN: %clang -emit-interface-stubs -o - %s %S/object.ifs
>> -emit-merged-ifs | \
>> +# RUN: FileCheck %s --check-prefixes=CHECK-IFS
>> +
>> +# RUN: %clang -emit-interface-stubs -o - %s %S/object.ifs | llvm-readelf
>> --all | \
>> +# RUN: FileCheck %s --check-prefixes=CHECK-ELF
>> +
>> +# RUN: %clang -emit-interface-stubs -o - %s %s -emit-merged-ifs | \
>> +# RUN: FileCheck %s --check-prefixes=CHECK-MERGE-IFS
>> +
>> +# CHECK-IFS: --- !experimental-ifs-v1
>> +# CHECK-IFS-NEXT: IfsVersion:      1.0
>> +# CHECK-IFS-NEXT: Triple:          x86_64-linux-gnu
>> +# CHECK-IFS-NEXT: ObjectFileFormat: ELF
>> +# CHECK-IFS-NEXT: Symbols:
>> +# CHECK-IFS-DAG:   a:               { Type: Func }
>> +# CHECK-IFS-DAG:   b:               { Type: Object, Size: 4 }
>> +# CHECK-IFS: ...
>> +
>> +# CHECK-ELF: ELF Header:
>> +# CHECK-ELF:   Class:                             ELF64
>> +# CHECK-ELF:   Type:                              DYN (Shared object
>> file)
>> +# CHECK-ELF:   FUNC    GLOBAL DEFAULT  1 a
>> +# CHECK-ELF:   OBJECT  GLOBAL DEFAULT  1 b
>> +
>> +# Here we are testing to see if two identical symbols will merge.
>> +# CHECK-MERGE-IFS: --- !experimental-ifs-v1
>> +# CHECK-MERGE-IFS-NEXT: IfsVersion:      1.0
>> +# CHECK-MERGE-IFS-NEXT: Triple:          x86_64-linux-gnu
>> +# CHECK-MERGE-IFS-NEXT: ObjectFileFormat: ELF
>> +# CHECK-MERGE-IFS-NEXT: Symbols:
>> +# CHECK-MERGE-IFS-NEXT:   a:               { Type: Func }
>> +# CHECK-MERGE-IFS-NEXT: ...
>> +
>> +--- !experimental-ifs-v1
>> +IfsVersion: 1.0
>> +Triple: x86_64-linux-gnu
>> +ObjectFileFormat: ELF
>> +Symbols:
>> +  a: { Type: Func }
>> +...
>>
>> Modified:
>> cfe/trunk/test/InterfaceStubs/function-template-specialization.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/InterfaceStubs/function-template-specialization.cpp?rev=373538&r1=373537&r2=373538&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/test/InterfaceStubs/function-template-specialization.cpp
>> (original)
>> +++ cfe/trunk/test/InterfaceStubs/function-template-specialization.cpp
>> Wed Oct  2 15:50:07 2019
>> @@ -1,13 +1,15 @@
>>  // REQUIRES: x86-registered-target
>> -// RUN: %clang -target x86_64-unknown-linux-gnu -o -
>> -emit-interface-stubs \
>> +
>> +// TODO: Fix the case in llvm-ifs where it crashes on an empty Symbols
>> list.
>> +// RUN: %clang -target x86_64-unknown-linux-gnu -o -
>> -emit-interface-stubs -c \
>>  // RUN: -interface-stub-version=experimental-ifs-v1 %s | FileCheck %s
>>
>> -// RUN: %clang -target x86_64-unknown-linux-gnu -o -
>> -emit-interface-stubs \
>> +// RUN: %clang -target x86_64-unknown-linux-gnu -o -
>> -emit-interface-stubs -emit-merged-ifs \
>>  // RUN: -interface-stub-version=experimental-ifs-v1 \
>>  // RUN: -DUSE_TEMPLATE_FUNCTION=1 %s | \
>>  // RUN: FileCheck -check-prefix=CHECK-USES-TEMPLATE-FUNCTION %s
>>
>> -// RUN: %clang -target x86_64-unknown-linux-gnu -o -
>> -emit-interface-stubs \
>> +// RUN: %clang -target x86_64-unknown-linux-gnu -o -
>> -emit-interface-stubs -emit-merged-ifs \
>>  // RUN: -interface-stub-version=experimental-ifs-v1 \
>>  // RUN: -DSPECIALIZE_TEMPLATE_FUNCTION=1 %s | \
>>  // RUN: FileCheck -check-prefix=CHECK-SPECIALIZES-TEMPLATE-FUNCTION %s
>>
>> Modified: cfe/trunk/test/InterfaceStubs/inline.c
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/InterfaceStubs/inline.c?rev=373538&r1=373537&r2=373538&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/test/InterfaceStubs/inline.c (original)
>> +++ cfe/trunk/test/InterfaceStubs/inline.c Wed Oct  2 15:50:07 2019
>> @@ -1,37 +1,32 @@
>>  // REQUIRES: x86-registered-target
>> -// RUN: %clang -DINLINE=inline -target x86_64-unknown-linux-gnu -o - \
>> -// RUN: -emit-interface-stubs \
>> -// RUN: -interface-stub-version=experimental-ifs-v1 -std=gnu89 -xc %s | \
>> +// RUN: %clang -c -DINLINE=inline -target x86_64-unknown-linux-gnu -o - \
>> +// RUN: -emit-interface-stubs -std=gnu89 -xc %s | \
>>  // RUN: FileCheck -check-prefix=CHECK-GNU %s
>>  // RUN: %clang -DINLINE=inline -target x86_64-linux-gnu -O0 -o - -c \
>>  // RUN: -std=gnu89 -xc %s | llvm-nm - | FileCheck
>> -check-prefix=CHECK-GNU %s
>>
>> -// RUN: %clang -DINLINE="__attribute__((always_inline))" \
>> -// RUN: -target x86_64-unknown-linux-gnu -o - -emit-interface-stubs \
>> -// RUN: -interface-stub-version=experimental-ifs-v1 -xc %s | \
>> +// RUN: %clang -c -DINLINE="__attribute__((always_inline))" \
>> +// RUN: -target x86_64-unknown-linux-gnu -o - -emit-interface-stubs -xc
>> %s | \
>>  // RUN: FileCheck -check-prefix=CHECK-GNU %s
>>  // RUN: %clang -DINLINE="__attribute__((always_inline))" \
>>  // RUN: -target x86_64-linux-gnu -O0 -o - -c -xc %s | \
>>  // RUN: llvm-nm - | FileCheck -check-prefix=CHECK-GNU %s
>>
>> -// RUN: %clang -DINLINE=inline -target x86_64-unknown-linux-gnu -o - \
>> -// RUN: -emit-interface-stubs \
>> -// RUN: -interface-stub-version=experimental-ifs-v1 -std=c99 -xc %s | \
>> +// RUN: %clang -c -DINLINE=inline -target x86_64-unknown-linux-gnu -o - \
>> +// RUN: -emit-interface-stubs -std=c99 -xc %s | \
>>  // RUN: FileCheck -check-prefix=CHECK-STD %s
>>  // RUN: %clang -DINLINE=inline -target x86_64-linux-gnu -O0 -o - -c
>> -std=c99 \
>>  // RUN: -xc %s | llvm-nm - 2>&1 | FileCheck -check-prefix=CHECK-STD %s
>>
>> -// RUN: %clang -DINLINE="__attribute__((noinline))" \
>> -// RUN: -target x86_64-unknown-linux-gnu -o - -emit-interface-stubs \
>> -// RUN: -interface-stub-version=experimental-ifs-v1 -std=c99 -xc %s | \
>> +// RUN: %clang -c -DINLINE="__attribute__((noinline))" \
>> +// RUN: -target x86_64-unknown-linux-gnu -o - -emit-interface-stubs
>> -std=c99 -xc %s | \
>>  // RUN: FileCheck -check-prefix=CHECK-NOINLINE %s
>>  // RUN: %clang -DINLINE="__attribute__((noinline))" -target
>> x86_64-linux-gnu \
>>  // RUN: -O0 -o - -c -std=c99 -xc %s | llvm-nm - 2>&1 | \
>>  // RUN: FileCheck -check-prefix=CHECK-NOINLINE %s
>>
>> -// RUN: %clang -DINLINE="static" -target x86_64-unknown-linux-gnu -o - \
>> -// RUN: -emit-interface-stubs \
>> -// RUN: -interface-stub-version=experimental-ifs-v1 -std=c99 -xc %s | \
>> +// RUN: %clang -c -DINLINE="static" -target x86_64-unknown-linux-gnu -o
>> - \
>> +// RUN: -emit-interface-stubs -std=c99 -xc %s | \
>>  // RUN: FileCheck -check-prefix=CHECK-STATIC %s
>>  // RUN: %clang -DINLINE="static" -target x86_64-linux-gnu -O0 -o - -c \
>>  // RUN: -std=c99 -xc %s | llvm-nm - 2>&1 | \
>> @@ -50,12 +45,12 @@ INLINE int foo() {
>>    return var;
>>  }
>>
>> -// RUN: %clang -DINLINE=inline -target x86_64-linux-gnu -o - \
>> -// RUN: -emit-interface-stubs
>> -interface-stub-version=experimental-ifs-v1 \
>> +// RUN: %clang -c -DINLINE=inline -target x86_64-linux-gnu -o - \
>> +// RUN: -emit-interface-stubs \
>>  // RUN: -std=gnu89 -xc %s | FileCheck -check-prefix=CHECK-TAPI %s
>>
>> -// RUN: %clang -DINLINE=inline -target x86_64-linux-gnu -o - \
>> -// RUN: -emit-interface-stubs
>> -interface-stub-version=experimental-ifs-v1 \
>> +// RUN: %clang -c -DINLINE=inline -target x86_64-linux-gnu -o - \
>> +// RUN: -emit-interface-stubs \
>>  // RUN: -std=gnu89 -xc %s | FileCheck -check-prefix=CHECK-SYMBOLS %s
>>  // RUN: %clang -DINLINE=inline -target x86_64-linux-gnu -o - \
>>  // RUN: -c -std=gnu89 -xc %s | llvm-nm - 2>&1 | \
>>
>> Added: cfe/trunk/test/InterfaceStubs/merge-conflict-test.c
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/InterfaceStubs/merge-conflict-test.c?rev=373538&view=auto
>>
>> ==============================================================================
>> --- cfe/trunk/test/InterfaceStubs/merge-conflict-test.c (added)
>> +++ cfe/trunk/test/InterfaceStubs/merge-conflict-test.c Wed Oct  2
>> 15:50:07 2019
>> @@ -0,0 +1,3 @@
>> +// RUN: not %clang -o libfoo.so -emit-interface-stubs %s
>> %S/driver-test.c 2>&1 | FileCheck %s
>> +// CHECK: error: Interface Stub: Type Mismatch
>> +int foo;
>> \ No newline at end of file
>>
>> Added: cfe/trunk/test/InterfaceStubs/object-double.c
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/InterfaceStubs/object-double.c?rev=373538&view=auto
>>
>> ==============================================================================
>> --- cfe/trunk/test/InterfaceStubs/object-double.c (added)
>> +++ cfe/trunk/test/InterfaceStubs/object-double.c Wed Oct  2 15:50:07 2019
>> @@ -0,0 +1,5 @@
>> +// RUN: not %clang -o - -emit-interface-stubs %s %S/object.c 2>&1 |
>> FileCheck %s
>> +// Need to encode more type info or weak vs strong symbol resolution in
>> llvm-ifs
>> +// XFAIL: *
>> +// CHECK: error: Interface Stub: Size Mismatch
>> +float data = 42.0;
>> \ No newline at end of file
>>
>> Added: cfe/trunk/test/InterfaceStubs/object-float.c
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/InterfaceStubs/object-float.c?rev=373538&view=auto
>>
>> ==============================================================================
>> --- cfe/trunk/test/InterfaceStubs/object-float.c (added)
>> +++ cfe/trunk/test/InterfaceStubs/object-float.c Wed Oct  2 15:50:07 2019
>> @@ -0,0 +1,3 @@
>> +// RUN: not %clang -o - -emit-interface-stubs %s %S/object.c 2>&1 |
>> FileCheck %s
>> +// CHECK: error: Interface Stub: Size Mismatch
>> +double data = 42.0;
>> \ No newline at end of file
>>
>> Added: cfe/trunk/test/InterfaceStubs/object.c
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/InterfaceStubs/object.c?rev=373538&view=auto
>>
>> ==============================================================================
>> --- cfe/trunk/test/InterfaceStubs/object.c (added)
>> +++ cfe/trunk/test/InterfaceStubs/object.c Wed Oct  2 15:50:07 2019
>> @@ -0,0 +1,7 @@
>> +// RUN: %clang -c -o - -emit-interface-stubs %s | FileCheck
>> -check-prefix=CHECK-TAPI %s
>> +// RUN: %clang -c -o - -emit-interface-stubs %s | FileCheck
>> -check-prefix=CHECK-SYMBOLS %s
>> +// RUN: %clang -c -o - %s | llvm-nm - 2>&1 | FileCheck
>> -check-prefix=CHECK-SYMBOLS %s
>> +
>> +// CHECK-TAPI: data: { Type: Object, Size: 4 }
>> +// CHECK-SYMBOLS: data
>> +int data = 42;
>>
>> Added: cfe/trunk/test/InterfaceStubs/object.ifs
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/InterfaceStubs/object.ifs?rev=373538&view=auto
>>
>> ==============================================================================
>> --- cfe/trunk/test/InterfaceStubs/object.ifs (added)
>> +++ cfe/trunk/test/InterfaceStubs/object.ifs Wed Oct  2 15:50:07 2019
>> @@ -0,0 +1,28 @@
>> +# RUN: %clang -emit-interface-stubs -o - -emit-merged-ifs %s | \
>> +# RUN: FileCheck %s --check-prefixes=CHECK-IFS
>> +
>> +# RUN: %clang -emit-interface-stubs -o - %s | llvm-readelf --all | \
>> +# RUN: FileCheck %s --check-prefixes=CHECK-ELF
>> +
>> +# CHECK-IFS: --- !experimental-ifs-v1
>> +# CHECK-IFS-NEXT: IfsVersion:      1.0
>> +# CHECK-IFS-NEXT: Triple: x86_64-linux-gnu
>> +# CHECK-IFS-NEXT: ObjectFileFormat: ELF
>> +# CHECK-IFS-NEXT: Symbols:
>> +# CHECK-IFS-NEXT:   b:               { Type: Object, Size: 4 }
>> +# CHECK-IFS-NEXT: ...
>> +
>> +# CHECK-ELF: ELF Header:
>> +# CHECK-ELF:   Class:                             ELF64
>> +# CHECK-ELF:   Data:                              2's complement, little
>> endian
>> +# CHECK-ELF:   Type:                              DYN (Shared object
>> file)
>> +# CHECK-ELF-NOT:   FUNC    GLOBAL DEFAULT  1 a
>> +# CHECK-ELF:   OBJECT  GLOBAL DEFAULT  1 b
>> +
>> +--- !experimental-ifs-v1
>> +IfsVersion: 1.0
>> +Triple: x86_64-linux-gnu
>> +ObjectFileFormat: ELF
>> +Symbols:
>> +  b: { Type: Object, Size: 4 }
>> +...
>>
>> Modified: cfe/trunk/test/InterfaceStubs/template-namespace-function.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/InterfaceStubs/template-namespace-function.cpp?rev=373538&r1=373537&r2=373538&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/test/InterfaceStubs/template-namespace-function.cpp
>> (original)
>> +++ cfe/trunk/test/InterfaceStubs/template-namespace-function.cpp Wed
>> Oct  2 15:50:07 2019
>> @@ -1,5 +1,5 @@
>>  // REQUIRES: x86-registered-target
>> -// RUN: %clang -target x86_64-unknown-linux-gnu -o -
>> -emit-interface-stubs \
>> +// RUN: %clang -target x86_64-unknown-linux-gnu -o -
>> -emit-interface-stubs -emit-merged-ifs \
>>  // RUN: -interface-stub-version=experimental-ifs-v1 %s | \
>>  // RUN: FileCheck %s
>>
>>
>> Modified: cfe/trunk/test/InterfaceStubs/weak.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/InterfaceStubs/weak.cpp?rev=373538&r1=373537&r2=373538&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/test/InterfaceStubs/weak.cpp (original)
>> +++ cfe/trunk/test/InterfaceStubs/weak.cpp Wed Oct  2 15:50:07 2019
>> @@ -1,5 +1,5 @@
>>  // REQUIRES: x86-registered-target
>> -// RUN: %clang -target x86_64-linux-gnu -o - -emit-interface-stubs \
>> +// RUN: %clang -target x86_64-linux-gnu -o - -emit-interface-stubs
>> -emit-merged-ifs \
>>  // RUN: -interface-stub-version=experimental-ifs-v1 %s | \
>>  // RUN: FileCheck %s
>>
>>
>> Modified: cfe/trunk/test/lit.cfg.py
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/lit.cfg.py?rev=373538&r1=373537&r2=373538&view=diff
>>
>> ==============================================================================
>> --- cfe/trunk/test/lit.cfg.py (original)
>> +++ cfe/trunk/test/lit.cfg.py Wed Oct  2 15:50:07 2019
>> @@ -26,7 +26,7 @@ config.test_format = lit.formats.ShTest(
>>
>>  # suffixes: A list of file extensions to treat as test files.
>>  config.suffixes = ['.c', '.cpp', '.cppm', '.m', '.mm', '.cu',
>> -                   '.ll', '.cl', '.s', '.S', '.modulemap', '.test',
>> '.rs']
>> +                   '.ll', '.cl', '.s', '.S', '.modulemap', '.test',
>> '.rs', '.ifs']
>>
>>  # excludes: A list of directories to exclude from the testsuite. The
>> 'Inputs'
>>  # subdirectories contain auxiliary inputs for various tests in their
>> parent
>> @@ -61,7 +61,7 @@ config.substitutions.append(('%PATH%', c
>>  tool_dirs = [config.clang_tools_dir, config.llvm_tools_dir]
>>
>>  tools = [
>> -    'c-index-test', 'clang-diff', 'clang-format', 'clang-tblgen', 'opt',
>> +    'c-index-test', 'clang-diff', 'clang-format', 'clang-tblgen', 'opt',
>> 'llvm-ifs',
>>      ToolSubst('%clang_extdef_map', command=FindTool(
>>          'clang-extdef-mapping'), unresolved='ignore'),
>>  ]
>>
>>
>> _______________________________________________
>> cfe-commits mailing list
>> cfe-commits at lists.llvm.org
>> https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
>>
>
>
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