https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119953
--- Comment #1 from Gabriel Marcano <gabemarcano at yahoo dot com> --- I've also run into this bug, and I've done some debugging. The problem, as the log states, appears to be a constraint failure. Specifically, it looks like GCC is trying to use R13 and R14 for the addsi3 insn, but it fails the earlyclobber constraint checks specifically because R13 and R14 are next to each other, and in SImode the MSP430 configuration states that a SI value takes 2 registers. I have no GCC development experience, but to me this looks like some constraint needs to be put on the registers selected so that in SImode they can't be right next to each other in the case of earlyclobber. How to do that... I'm not quite sure yet.
