https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92023
--- Comment #2 from Bruno De Fraine <bruno-gcc at defraine dot net> --- Thanks Richard, for explaining that gcc is optimizing the comparison between the address of a static object and a pointer to dynamic memory returned by operator new[]. I realized something was special about my operator delete[], but I had not figured out what. I cannot judge if the optimization performed by gcc is allowed by the C++ language or not, but I can certainly see how it is likely a very useful optimization in the overwhelming majority of cases. In such a context, I can sympathize with compilers that require that you take special care when implementing library functions for which the compiler has built-in knowledge (e.g. avoiding that the compiler optimizes your memcpy implementation to a memcpy call comes to mind as a similar problem). To avoid the optimization in my case, it seems to work to cast the pointers to uintptr_t before comparison.
