[Bug rtl-optimization/49330] Integer arithmetic on addresses optimised with pointer arithmetic rules

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49330

--- Comment #9 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-06-10 10:55:53 UTC ---
> Creating that pointer is perfectly valid - you are allowed to cast a
> pointer to an uintptr_t and back, which is what the code does (in some
> obfuscated way of course).

No disagreement, "problematic" only in the sense that it breaks the assumption
of the aliasing machinery, as you're creating a pointer out of nothing.