https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115351
Roger Sayle <roger at nextmovesoftware dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Assignee|unassigned at gcc dot gnu.org |roger at nextmovesoftware dot com --- Comment #3 from Roger Sayle <roger at nextmovesoftware dot com> --- I have a fix (to ix86_rtx_costs) that I'm bootstrapping and regression testing. By making concatditi3 slightly cheaper than *insvti_highpart (COSTS_N_INSN(2) vs. COSTS_N_INSNS(2)+1), fwprop is able to do the right.