diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index c6068d7..7fe0a86 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -405,6 +405,13 @@
             .Case("limited", CodeGenOptions::LimitedDebugInfo)
             .Case("standalone", CodeGenOptions::FullDebugInfo));
   }
+  if (Arg *A = Args.getLastArg(OPT_debugger_tuning_EQ)) {
+    Opts.setDebuggerTuning(
+        llvm::StringSwitch<CodeGenOptions::DebuggerKind>(A->getValue())
+            .Case("gdb", CodeGenOptions::DebuggerKindGDB)
+            .Case("lldb", CodeGenOptions::DebuggerKindLLDB)
+            .Case("sce", CodeGenOptions::DebuggerKindSCE));
+  }
   Opts.DwarfVersion = getLastArgIntValue(Args, OPT_dwarf_version_EQ, 0, Diags);
   Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
   Opts.EmitCodeView = Args.hasArg(OPT_gcodeview);