[Bug tree-optimization/92879] [10 Regression] incorrect warning of __builtin_memset offset is out of the bounds on zero-size allocation and initialization

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92879

--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
After some more thought I think I need to correct myself: I suppose even in a
ctor the this pointer might need to be treated as having escaped and be
accessible to a replacement operator new, but placement new is not replaceable
so it can't access such an escaped pointer.