https://gcc.gnu.org/bugzilla/show_bug.cgi?id=45689 Bug 45689 depends on bug 83650, which changed state.
Bug 83650 Summary: [6/7/8 Regression] Wrong simplification in cshift with negative shifts https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83650 What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED