[PATCH] [AST] Introduce a new DecayedType sugar node

[Reid Kleckner]

  Thanks for the review!  Will commit with fixes for the remaining comments.


================
Comment at: lib/StaticAnalyzer/Checkers/CheckSecuritySyntaxOnly.cpp:310
@@ -309,3 +309,3 @@
   // Is the argument a 'char*'?
-  const PointerType *PT = dyn_cast<PointerType>(FPT->getArgType(0));
+  const PointerType *PT = FPT->getArgType(0)->getAs<PointerType>();
   if (!PT)
----------------
Richard Smith wrote:
> There's a bunch more of these elsewhere in the file. Please commit these fixes separately.
Do you mean I need to look for more, or just that there are many changes, and therefore I should commit them separate from the rest of DecayedType?  I went ahead and committed the current checker changes as is in r184755.


http://llvm-reviews.chandlerc.com/D1014