[Bug libstdc++/110287] _M_check_len is expensive

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110287
Bug 110287 depends on bug 112653, which changed state.

Bug 112653 Summary: PTA should handle correctly escape information of values returned by a function
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112653

           What    |Removed                     |Added
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             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED