https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91886
--- Comment #6 from nsz at gcc dot gnu.org --- (In reply to Segher Boessenkool from comment #5) > -- LLVM should support "wa", since that is *the* constraint for VSX > registers. > -- musl should use the "wa" constraint in its inline asm. > -- If after those two you still want "ws" (for compiling legacy code, say), I > can add that back to GCC 10 (it will do just the same as "wa"). > > Is that a plan? llvm only accepts vector types for wa, not scalar types, so there is a difference between wa and ws in llvm. i guess musl can switch to wa and configure check if it works (and disable the asm on compilers where it does not) but i would prefer if ws and ww were kept as alias to wa in gcc to avoid breaking existing code (this should not have huge maintenance cost).
