[Bug debug/87215] Unused debug info with -std=c++17

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87215

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

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

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
There's a related PR about us emitting more unused debug for global
declarations
(rather than types) and DWARF mode not implementing
-feliminate-unused-debug-symbols).  This probably is the reason for this
regression by making the previously unused types no longer unused.