2 files changed, 1 insertions, 35 deletions

diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
index 7ad09accd8c..a2cf06a20cd 100644
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -284,26 +284,6 @@ DerivedArgList *Driver::TranslateInputArgs(const InputArgList &Args) const {
   return DAL;
 }
 
-/// \brief Check whether there are multiple instances of OptionID in Args, and
-/// if so, issue a diagnostics about it.
-static void DiagnoseOptionOverride(const Driver &D, const DerivedArgList &Args,
-                                   unsigned OptionID) {
-  assert(Args.hasArg(OptionID));
-
-  arg_iterator it = Args.filtered_begin(OptionID);
-  arg_iterator ie = Args.filtered_end();
-  Arg *Previous = *it;
-  ++it;
-
-  while (it != ie) {
-    D.Diag(clang::diag::warn_drv_overriding_joined_option)
-        << Previous->getSpelling() << Previous->getValue()
-        << (*it)->getSpelling() << (*it)->getValue();
-    Previous = *it;
-    ++it;
-  }
-}
-
 Compilation *Driver::BuildCompilation(ArrayRef<const char *> ArgList) {
   llvm::PrettyStackTraceString CrashInfo("Compilation construction");
 
@@ -1158,7 +1138,6 @@ void Driver::BuildActions(const ToolChain &TC, DerivedArgList &Args,
 
   // Diagnose misuse of /Fo.
   if (Arg *A = Args.getLastArg(options::OPT__SLASH_Fo)) {
-    DiagnoseOptionOverride(*this, Args, options::OPT__SLASH_Fo);
     StringRef V = A->getValue();
     if (V.empty()) {
       // It has to have a value.
@@ -1174,7 +1153,6 @@ void Driver::BuildActions(const ToolChain &TC, DerivedArgList &Args,
 
   // Diagnose misuse of /Fe.
   if (Arg *A = Args.getLastArg(options::OPT__SLASH_Fe)) {
-    DiagnoseOptionOverride(*this, Args, options::OPT__SLASH_Fe);
     if (A->getValue()[0] == '\0') {
       // It has to have a value.
       Diag(clang::diag::err_drv_missing_argument) << A->getSpelling() << 1;
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index a728b4dc81c..c71514064f7 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -3724,21 +3724,9 @@ void Clang::AddClangCLArgs(const ArgList &Args, ArgStringList &CmdArgs) const {
     // but defining _DEBUG is sticky.
     RTOptionID = options::OPT__SLASH_MTd;
 
-  if (Arg *A = Args.getLastArg(options::OPT__SLASH_M_Group)) {
+  if (Arg *A = Args.getLastArg(options::OPT__SLASH_M_Group))
     RTOptionID = A->getOption().getID();
 
-    // Diagnose overrides.
-    arg_iterator it = Args.filtered_begin(options::OPT__SLASH_M_Group);
-    Arg *Previous = *it++;
-    const arg_iterator ie = Args.filtered_end();
-    while (it != ie) {
-      const Driver &D = getToolChain().getDriver();
-      D.Diag(clang::diag::warn_drv_overriding_flag_option)
-        << Previous->getSpelling() << (*it)->getSpelling();
-      Previous = *it++;
-    }
-  }
-
   switch(RTOptionID) {
     case options::OPT__SLASH_MD:
       if (Args.hasArg(options::OPT__SLASH_LDd))