[Bug tree-optimization/116938] move_stmt in phiopt should use rewrite_to_defined_overflow

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116938
Bug 116938 depends on bug 116939, which changed state.

Bug 116939 Summary: 
rewrite_to_defined_overflow/gimple_with_undefined_signed_overflow should also 
rewrite VCEs (from/to integral types) into casts
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116939

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