[Bug gcov-profile/118581] auto_profile can't annotate bb with all debug_stmt which assigned value with constant

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118581

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
> Does it have counter info for PHI arguments (aka copies emitted on those
> edges)?

I think yes, so IMO it should check a single successors PHIs corresponding
to the block and use those counts.