[Bug tree-optimization/82991] memcpy and strcpy return value can be assumed to be equal to first argument

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82991
Bug 82991 depends on bug 83142, which changed state.

Bug 83142 Summary: Missed tail-call opportunity with memmove and other 
mem*/str* functions which return the first argument back
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83142

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
         Resolution|---                         |DUPLICATE