https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91886
--- Comment #14 from Rich Felker <bugdal at aerifal dot cx> --- > So, if "ws" has been documented in the user documentation, perhaps just > (define_register_constraint "ws" "rs6000_constraints[RS6000_CONSTRAINT_wa]" > "Compatibility alias to wa") > could be added? If it has not been documented, it is fine to remove it. It is clearly documented here: https://gcc.gnu.org/onlinedocs/gcc-9.2.0/gcc/Machine-Constraints.html Whoever removed it in gcc 10 was aware of this because they explicitly deleted it from the documentation: https://gcc.gnu.org/onlinedocs/gcc/Machine-Constraints.html This should not be a permitted change, at least not without major discussion to reach consensus.
