[Bug tree-optimization/86573] Failure to optimise passing simple values to inlined function

[s_gccbugzilla at nedprod dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86573

--- Comment #5 from Niall Douglas <s_gccbugzilla at nedprod dot com> ---
Thanks for the rapid feedback. Very very interesting that -std=c++17 causes
spew for the copy case https://godbolt.org/g/Xnrgg2, yet -std=c++14 or
-std=c++11 does not.

Is the -std=c++17 case worth opening a new bug report for?