[Bug tree-optimization/125692] [16/17 Regression] ICE at -O3 with -g on x86_64-linux-gnu: verify_ssa failed since r16-6679

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125692

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

           What    |Removed                     |Added
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                 CC|                            |rguenth at gcc dot gnu.org

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
ISTR we solved this for vectorization somehow...  but yeah, having no debug
PHIs  is a PITA.

I think one "conservative" approach would be to wipe such debug uses when
rewriting into loop-closed SSA.  In fact I think that's the only reasonable
thing to do?