On Mon, Jul 10, 2017 at 05:10:03PM +0200, Georg-Johann Lay wrote: > Any ideas for a sane approach?
You could change insn_rtx_cost to actually calculate the cost of the insn, not just set_src_cost of a single set. This will need checking on a great many targets, not in the least because most target's cost functions are, uh, not so good. Big project, but hopefully well worth the effort. Or you change your cost function to on a QImode shift assume it is an insert instruction. Not correct of course (but neither is the currently calculated cost), but perhaps it gives good results in practice? Segher
