[PATCH] SanitizerArgs: add ability to filter/diagnose unsupported sanitizers.

[Alexey Samsonov]

  +Richard, who reviewed the original patch

  I support this change.


================
Comment at: include/clang/Driver/SanitizerArgs.h:119
@@ +118,3 @@
+
+  static unsigned expandGroups(unsigned Kinds);
+
----------------
Can you add a comment for these functions?

================
Comment at: lib/Driver/SanitizerArgs.cpp:232
@@ +231,3 @@
+        TC.getTriple().getArch() == llvm::Triple::x86_64)) {
+    if (Kinds & Memory) {
+      Kinds &= ~Memory;
----------------
This part:
  if (Kinds & Foo) {
    Kinds &= ~Foo;
    <...>
  }
can be factored out into a separate function.


http://llvm-reviews.chandlerc.com/D1990