[Bug tree-optimization/117924] unused std::vector are not optimized out fully at gimple level

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117924
Bug 117924 depends on bug 121921, which changed state.

Bug 121921 Summary: `e - (e - b)` for pointers is not optimized to just b
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121921

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