[Bug tree-optimization/57359] store motion causes wrong code for union access at -O3

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57359
Bug 57359 depends on bug 95025, which changed state.

Bug 95025 Summary: [11 Regression] ICE in execute_sm_exit at 
gcc/tree-ssa-loop-im.c:2224 since r11-161-g283cb9ea6293e813
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95025

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