https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87391
--- Comment #4 from Alex Bradbury <asb at lowrisc dot org> --- (In reply to Jim Wilson from comment #2) > One can specify an architecture with FP registers, and an ABI that does not > use the FP registers. By the same token, it is reasonable to expect that > one should be able to specify an rv32i architecture and use an rv32e ABI > with it. In both cases, the unused registers all become call clobbered (aka > caller saved). It's a reasonable expectation, but the ABI docs explicitly state it is an illegal combination. It would make sense to propose a change to the ABI if you want to support -mabi=ilp32e -march=rv32i.
