Also respect -mergeable-traps when merging cond_fails in SILOptimizer

lib/Frontend/CompilerInvocation.cpp

@@ -3109,11 +3109,11 @@ static bool ParseSILArgs(SILOptions &Opts, ArgList &Args,
     Opts.ShouldFunctionsBePreservedToDebugger &=
         LTOKind.value() == IRGenLLVMLTOKind::None;
 
-  
-  Opts.EnableAddressDependencies =
+    Opts.EnableAddressDependencies =
     Args.hasFlag(OPT_enable_address_dependencies,
                  OPT_disable_address_dependencies,
                  Opts.EnableAddressDependencies);
+  Opts.MergeableTraps = Args.hasArg(OPT_mergeable_traps);
 
   return false;
 }