[Bug other/16996] [meta-bug] code size improvements

[roger at nextmovesoftware dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=16996
Bug 16996 depends on bug 40361, which changed state.

Bug 40361 Summary: Conditional return not always profitable with -Os
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=40361

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