adding flag

Author: Jordan Cantrell

clang/include/clang/Driver/Options.td

@@ -1751,6 +1751,8 @@ def freroll_loops : Flag<["-"], "freroll-loops">, Group<f_Group>,
   HelpText<"Turn on loop reroller">, Flags<[CC1Option]>;
 def fno_reroll_loops : Flag<["-"], "fno-reroll-loops">, Group<f_Group>,
   HelpText<"Turn off loop reroller">;
+def thisisaflagpleasechangeme : Flag<["-"], "thisisaflagpleasechangeme">, Group<f_Group>,
+  HelpText<"Turn off auto selection for struct randomization">, Flags<[CC1Option]>;
 def ftrigraphs : Flag<["-"], "ftrigraphs">, Group<f_Group>,
   HelpText<"Process trigraph sequences">, Flags<[CC1Option]>;
 def fno_trigraphs : Flag<["-"], "fno-trigraphs">, Group<f_Group>,

clang/lib/Driver/ToolChains/Clang.cpp

@@ -4411,6 +4411,10 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
     CmdArgs.push_back(A->getValue(0));
   }
 
+  if (Arg *A = Args.getLastArg(options::OPT_thisisaflagpleasechangeme)) {
+    CmdArgs.push_back( "-thisisaflagpleasechangeme" );
+  }
+
   // -fvisibility= and -fvisibility-ms-compat are of a piece.
   if (const Arg *A = Args.getLastArg(options::OPT_fvisibility_EQ,
                                      options::OPT_fvisibility_ms_compat)) {

clang/lib/Frontend/CompilerInvocation.cpp

@@ -1674,6 +1674,9 @@ static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
   if (const Arg* A = Args.getLastArg(OPT_frandstruct_seed)) {
     RandstructSeed = A->getValue(0);
   }
+  if (const Arg* A = Args.getLastArg(OPT_thisisaflagpleasechangeme)) {
+    RandstructFlag = true;
+  }
   Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
   for (const auto *AA : Args.filtered(OPT_plugin_arg))
     Opts.PluginArgs[AA->getValue(0)].emplace_back(AA->getValue(1));