Reland "[clang-repl] Re-implement clang-interpreter as a test case."

Original commit message: "
    Original commit message:"
      The current infrastructure in lib/Interpreter has a tool, clang-repl, very
      similar to clang-interpreter which also allows incremental compilation.

      This patch moves clang-interpreter as a test case and drops it as conditionally
      built example as we already have clang-repl in place.

      Differential revision: https://reviews.llvm.org/D107049
    "

    This patch also ignores ppc due to missing weak symbol for __gxx_personality_v0
    which may be a feature request for the jit infrastructure. Also, adds a missing
    build system dependency to the orc jit.
"

Additionally, this patch defines a custom exception type and thus avoids the
requirement to include header <exception>, making it easier to deploy across
systems without standard location of the c++ headers.

Differential revision: https://reviews.llvm.org/D107049

4 files changed, 0 insertions, 147 deletions

diff --git a/clang/examples/CMakeLists.txt b/clang/examples/CMakeLists.txt
index 300d8d795c67..8a4139f5d8c1 100644
--- a/clang/examples/CMakeLists.txt
+++ b/clang/examples/CMakeLists.txt
@@ -3,7 +3,6 @@ if(NOT CLANG_BUILD_EXAMPLES)
   set(EXCLUDE_FROM_ALL ON)
 endif()
 
-add_subdirectory(clang-interpreter)
 add_subdirectory(PrintFunctionNames)
 add_subdirectory(AnnotateFunctions)
 add_subdirectory(Attribute)
diff --git a/clang/examples/clang-interpreter/CMakeLists.txt b/clang/examples/clang-interpreter/CMakeLists.txt
deleted file mode 100644
index 11056aa379ae..000000000000
--- a/clang/examples/clang-interpreter/CMakeLists.txt
+++ /dev/null
@@ -1,93 +0,0 @@
-set(LLVM_LINK_COMPONENTS
-  Core
-  ExecutionEngine
-  MC
-  MCJIT
-  Object
-  OrcJit
-  Option
-  RuntimeDyld
-  Support
-  native
-  )
-
-add_clang_executable(clang-interpreter
-  main.cpp
-  )
-
-add_dependencies(clang-interpreter
-  clang-resource-headers
-  )
-
-clang_target_link_libraries(clang-interpreter
-  PRIVATE
-  clangBasic
-  clangCodeGen
-  clangDriver
-  clangFrontend
-  clangSerialization
-  )
-
-export_executable_symbols(clang-interpreter)
-
-if (MSVC)
-  # Is this a CMake bug that even with export_executable_symbols, Windows
-  # needs to explictly export the type_info vtable
-  set_property(TARGET clang-interpreter
-               APPEND_STRING PROPERTY LINK_FLAGS " /EXPORT:??_7type_info@@6B@")
-endif()
-
-function(clang_enable_exceptions TARGET)
-  # Really have to jump through hoops to enable exception handling independent
-  # of how LLVM is being built.
-  if (NOT LLVM_REQUIRES_EH AND NOT LLVM_REQUIRES_RTTI)
-    if (MSVC)
-      # /EHs to allow throwing from extern "C"
-      set(excptnExceptions_ON "/D _HAS_EXCEPTIONS=1 /EHs /wd4714")
-      set(excptnExceptions_OFF "/D _HAS_EXCEPTIONS=0 /EHs-c-")
-      set(excptnRTTI_ON "/GR")
-      set(excptnRTTI_OFF "/GR-")
-      set(excptnEHRTTIRegEx "(/EHs(-c-?)|_HAS_EXCEPTIONS=(0|1))")
-    else()
-      set(excptnExceptions_ON "-fexceptions")
-      set(excptnExceptions_OFF "-fno-exceptions")
-      set(excptnRTTI_ON "-frtti")
-      set(excptnRTTI_OFF "-fno-rtti")
-      set(excptnEHRTTIRegEx "-f(exceptions|no-exceptions)")
-    endif()
-    if (LLVM_REQUIRES_EH)
-      set(excptnExceptions_DFLT ${excptnExceptions_ON})
-    else()
-      set(excptnExceptions_DFLT ${excptnExceptions_OFF})
-    endif()
-    if (LLVM_REQUIRES_RTTI)
-      set(excptnRTTI_DFLT ${excptnRTTI_ON})
-    else()
-      set(excptnRTTI_DFLT ${excptnRTTI_OFF})
-    endif()
-
-    # Strip the exception & rtti flags from the target
-    get_property(addedFlags TARGET ${TARGET} PROPERTY COMPILE_FLAGS)
-    string(REGEX REPLACE ${excptnEHRTTIRegEx} "" editedFlags "${addedFlags}")
-    string(REPLACE ${excptnRTTI_OFF} "" editedFlags "${editedFlags}")
-    set_property(TARGET ${TARGET} PROPERTY COMPILE_FLAGS "${editedFlags}")
-
-    get_property(addedFlags TARGET ${TARGET} PROPERTY COMPILE_DEFINITIONS)
-    string(REGEX REPLACE ${excptnEHRTTIRegEx} "" editedFlags "${addedFlags}")
-    string(REPLACE ${excptnRTTI_OFF} "" editedFlags "${editedFlags}")
-    set_property(TARGET ${TARGET} PROPERTY COMPILE_DEFINITIONS "${editedFlags}")
-
-    # Re-add the exception & rtti flags from LLVM
-    set_property(SOURCE main.cpp APPEND_STRING PROPERTY COMPILE_FLAGS
-                   " ${excptnExceptions_DFLT} ${excptnRTTI_DFLT} ")
-    set_property(SOURCE Manager.cpp APPEND_STRING PROPERTY COMPILE_FLAGS
-                   " ${excptnExceptions_DFLT} ${excptnRTTI_DFLT} ")
-
-    # Invoke with exceptions & rtti
-    set_property(SOURCE Invoke.cpp APPEND_STRING PROPERTY COMPILE_FLAGS
-                   " ${excptnExceptions_ON} ${excptnRTTI_ON} ")
-
-  endif()
-endfunction(clang_enable_exceptions)
-
-clang_enable_exceptions(clang-interpreter)
diff --git a/clang/examples/clang-interpreter/README.txt b/clang/examples/clang-interpreter/README.txt
deleted file mode 100644
index b4f8a935cef8..000000000000
--- a/clang/examples/clang-interpreter/README.txt
+++ /dev/null
@@ -1,20 +0,0 @@
-This is an example of Clang based interpreter, for executing standalone C/C++
-programs.
-
-It demonstrates the following features:
- 1. Parsing standard compiler command line arguments using the Driver library.
-
- 2. Constructing a Clang compiler instance, using the appropriate arguments
-    derived in step #1.
-
- 3. Invoking the Clang compiler to lex, parse, syntax check, and then generate
-    LLVM code.
-
- 4. Use the LLVM JIT functionality to execute the final module.
-
- 5. Intercepting a Win64 library call to allow throwing and catching exceptions
-    in and from the JIT.
-
-The implementation has many limitations and is not designed to be a full fledged
-interpreter. It is designed to demonstrate a simple but functional use of the
-Clang compiler libraries.
diff --git a/clang/examples/clang-interpreter/Test.cxx b/clang/examples/clang-interpreter/Test.cxx
deleted file mode 100644
index ed7fc86f9e5f..000000000000
--- a/clang/examples/clang-interpreter/Test.cxx
+++ /dev/null
@@ -1,33 +0,0 @@
-//===-- examples/clang-interpreter/Test.cxx - Clang C Interpreter Example -===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-
-// Example throwing in and from the JIT (particularly on Win64).
-//
-// ./bin/clang-interpreter <src>/tools/clang/examples/clang-interpreter/Test.cxx
-
-#include <stdexcept>
-#include <stdio.h>
-
-static void ThrowerAnError(const char* Name) {
-  throw std::runtime_error(Name);
-}
-
-int main(int argc, const char** argv) {
-  for (int I = 0; I < argc; ++I)
-   printf("arg[%d]='%s'\n", I, argv[I]);
-
-  try {
-    ThrowerAnError("In JIT");
-  } catch (const std::exception& E) {
-    printf("Caught: '%s'\n", E.what());
-  } catch (...) {
-    printf("Unknown exception\n");
-  }
-  ThrowerAnError("From JIT");
-  return 0;
-}