[PATCH] D15324: [Sema] Emit warnings when comparing result of a function with `returns_nonnull` to null

[George Burgess IV via cfe-commits]

george.burgess.iv updated this revision to Diff 42204.
george.burgess.iv marked 4 inline comments as done.
george.burgess.iv added a comment.

- Addressed all feedback
- Refactored a loop to make its intent more clear


http://reviews.llvm.org/D15324

Files:
  include/clang/Basic/DiagnosticSemaKinds.td
  include/clang/Sema/ScopeInfo.h
  lib/Sema/SemaChecking.cpp
  test/Sema/nonnull.c

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