https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99937
--- Comment #2 from mike.robins at talktalk dot net --- (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