It's still a crapshoot. GCC on xtensa adds extra instructions in several places. GCC on Arm Cortex-M0 has awful register allocation, and M0 has half as many r

It's still a crapshoot. GCC on xtensa adds extra instructions in several places. GCC on Arm Cortex-M0 has awful register allocation, and M0 has half as many registers as most ARMs...