Revert "Dead Virtual Function Elimination"

This reverts commit 9f6a873268e1ad9855873d9d8007086c0d01cf4f.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@374844 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 24 deletions

diff --git a/lib/Driver/ToolChains/Clang.cpp b/lib/Driver/ToolChains/Clang.cpp
index dfb3f33608..1ecc4d216d 100644
--- a/lib/Driver/ToolChains/Clang.cpp
+++ b/lib/Driver/ToolChains/Clang.cpp
@@ -5366,30 +5366,9 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
     CmdArgs.push_back(Args.MakeArgString(TargetInfo.str()));
   }
 
-  bool VirtualFunctionElimination =
-      Args.hasFlag(options::OPT_fvirtual_function_elimination,
-                   options::OPT_fno_virtual_function_elimination, false);
-  if (VirtualFunctionElimination) {
-    // VFE requires full LTO (currently, this might be relaxed to allow ThinLTO
-    // in the future).
-    if (D.getLTOMode() != LTOK_Full)
-      D.Diag(diag::err_drv_argument_only_allowed_with)
-          << "-fvirtual-function-elimination"
-          << "-flto=full";
-
-    CmdArgs.push_back("-fvirtual-function-elimination");
-  }
-
-  // VFE requires whole-program-vtables, and enables it by default.
-  bool WholeProgramVTables = Args.hasFlag(
-      options::OPT_fwhole_program_vtables,
-      options::OPT_fno_whole_program_vtables, VirtualFunctionElimination);
-  if (VirtualFunctionElimination && !WholeProgramVTables) {
-    D.Diag(diag::err_drv_argument_not_allowed_with)
-        << "-fno-whole-program-vtables"
-        << "-fvirtual-function-elimination";
-  }
-
+  bool WholeProgramVTables =
+      Args.hasFlag(options::OPT_fwhole_program_vtables,
+                   options::OPT_fno_whole_program_vtables, false);
   if (WholeProgramVTables) {
     if (!D.isUsingLTO())
       D.Diag(diag::err_drv_argument_only_allowed_with)