https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61112

Martin Sebor <msebor at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |diagnostic
                 CC|                            |msebor at gcc dot gnu.org

--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
The test case in comment #0 was fixed by r227942:

[PATCH] Fix 47679 by improving jump threading

        PR tree-optimization/47679
        * tree-ssa-dom.c (record_temporary_equivalences): No longer static.
        * tree-ssa-dom.h (record_temporary_equivalences): Add prototype.
        * tree-ssa-threadedge.c: Include tree-ssa-dom.h.
        (thread_through_normal_block): Use record_temporary_equivalences.

        PR tree-optimization/47679
        * g++.dg/warn/Wuninitialized-6.C: New test.

The test case in comment #5 still results in -Wmaybe-uninitialized with GCC 9. 
As far as bisection shows, it has always been diagnosed.

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