[Bug tree-optimization/55177] missed optimizations with __builtin_bswap

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55177
Bug 55177 depends on bug 60669, which changed state.

Bug 60669 Summary: VRP misses asserts for some already defined statements
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60669

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