https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82533
--- Comment #1 from Jim Wilson <wilson at gcc dot gnu.org> --- A reviewer suggested using register_offset in the address cost structure to fix this. That doesn't prevent all reg+reg addressing modes from being generated, though this might be fixable with some work. However, a bigger problem, is that it disables reg+reg addressing modes for both loads and stores, and disabling reg+reg loads reduces performance on Falkor. It is only the reg+reg quad-word store that needs to be disabled for best performance. To make this happen, we need to modify the md file.
