[Bug c++/2972] -Wuninitialized could warn about uninitialized member variable usage in constructors

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=2972

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot gnu.org

--- Comment #22 from Richard Biener <rguenth at gcc dot gnu.org> ---
I have a fix for this, incremental over the PR79345 one.

t.C: In constructor ‘A::A()’:
t.C:7:11: warning: ‘*<unknown>.A::g’ is used uninitialized in this function
[-Wuninitialized]
       f = g;
           ^

comes at the cost of initializing pointer-based refs as opposed to only
var-based (so this cost can be non-trivial).