[Bug tree-optimization/94274] fold phi whose incoming args are defined from binary operations

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94274

--- Comment #8 from Drea Pinski <pinskia at gcc dot gnu.org> ---
Example 1 of comment #0 was fixed by r17-1507-gc43fed44d9ac34.
Example 1 of comment #3 is also fixed by r17-1507-gc43fed44d9ac34.

Example 2 of comment #0 is harder.