[LLVMbugs] [Bug 18095] clang 3.3 and more recent miscompiles NULL pointer arithmetic in optimized builds (O2)

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=18095

Mathieu Desnoyers <mathieu.desnoyers at efficios.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|INVALID                     |---

--- Comment #3 from Mathieu Desnoyers <mathieu.desnoyers at efficios.com> ---
Have you guys considered perhaps emitting a warning when clang finds such an
undefined behavior ? This would have the advantage of both carrying the
optimization when undefined behaviors are detected (performance) and making
sure existing code that worked fine on gcc and previous llvm versions don't end
up crashing in front of application end-users without warning to the developer
(robustness).

Thanks for the pointers,

Mathieu

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