[Bug tree-optimization/124006] Improve another conditional sequence for RISC-V

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124006
Bug 124006 depends on bug 124405, which changed state.

Bug 124405 Summary: cselim sometimes does not handle conditional store 
elimination
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124405

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