[PATCH] clang-cl: Add the /c, /W0 and /W1 options

[Reid Kleckner]

  LGTM


================
Comment at: lib/Driver/WindowsToolChain.cpp:351
@@ +350,3 @@
+      break;
+    case options::OPT__SLASH_W1:
+      Alias = "all";
----------------
Is it necessary to have this custom handling for aliased options?  I was hoping to limit the custom handling to things that can't be expressed as simple aliases like -W0.

================
Comment at: include/clang/Driver/Options.td:176
@@ -173,3 +175,3 @@
 
-def _HASH_HASH_HASH : Flag<["-"], "###">, Flags<[DriverOption]>,
+def _HASH_HASH_HASH : Flag<["-"], "###">, Flags<[DriverOption, CLOption]>,
     HelpText<"Print the commands to run for this compilation">;
----------------
Probably worth a TODO that in the long run this should be ClangOption instead of CLOption.


http://llvm-reviews.chandlerc.com/D1232