https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49244
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |hjl.tools at gmail dot com --- Comment #24 from Jakub Jelinek <jakub at gcc dot gnu.org> --- I wanted to look at #c20, but at least my i9-7960X for e.g. lock; btsl $65, var acts the same as lock; btsl $1, var rather than lock; btsl $1, var+8, so maybe #c20 is not possible.