[PATCH] Add warnings for undefined behaviors with pointers

[Reid Kleckner]

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Comment at: include/clang/Basic/DiagnosticSemaKinds.td:2394
@@ +2393,3 @@
+  "removed during optimization">,
+  InGroup<UndefinedBoolConversion>, DefaultIgnore;
+def warn_address_of_reference_bool_conversion : Warning<
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Should these really all be DefaultIgnore if we're optimizing these checks away?

http://reviews.llvm.org/D3999