https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68837
--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> --- On Power9 the lwa insn is cracked into an lwz and an extsw, just like on older CPUs. Cracked instructions have fewer constraints on p9 than they did on most older CPUs though (it doesn't have to be first in a fetch group any more). It still saves one insn to execute if lwz would be enough. Another option may be to just do an ld even: this saves the number of insns needed, but it takes more space for the table (so it won't be cached / prefetched as well), and absolute addresses require relocations.
