https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65242
--- Comment #8 from Michael Meissner <meissner at gcc dot gnu.org> --- I'm going to start looking at this. I suspect the issue is we need more checks about the offset in TOC references. In particular, the 64-bit GPR load/store instruction (ld, std), the sign-extended 32-bit load (lwa), and 128-bit load/store (lq, stq) are B-form instructions instead of D-form, meaning that the bottom 2 bits of the offset are required to be zero, and the encoding uses these bits for other purposes.
