https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99937
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> --- (In reply to mike.robins from comment #2) > (In reply to Richard Biener from comment #1) > > You need to adjust RTX costing accordingly which likely means adding a new > > subtarget tuning. > > Hi Richard > Are you saying that this would have to be added at the GCC source level > somehow. I.e that there is no existing -mtune... or -f... to achieve this? > Mike Generally yes. I don't know the arm backend enough to tell whether there exists an ARM variant with the multiplier behaving in this way (I suppose an in-order, non-pipelined m0 core might behave this way ...)
