[Bug tree-optimization/113662] [13/14/15 Regression] Wrong code for std::sort with fancy pointer since r13-6945-g429a7a88438cc8

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113662

--- Comment #7 from Sam James <sjames at gcc dot gnu.org> ---
> I'd be glad to perform other tests if needed.

We could really do with the Boost dependency being dropped if you could try
spend time on that.

Also, please attach preprocessed source for the original testcase.