[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
Bug 94274 depends on bug 112402, which changed state.

Bug 112402 Summary: [12/13/14/15 Regression] Path splitting causes 
if-conversion miss
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112402

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