> target_insn_cost is used to prevent rpad optimization to be restored by
> late_combine1, looks like it's not sufficient for size_cost.
>
> 21804static int
> 21805ix86_insn_cost (rtx_insn *insn, bool speed)
> 21806{
> 21807 int insn_cost = 0;
> 21808 /* Add extra cost to avoid post_reload late
> -Original Message-
> From: Jan Hubicka
> Sent: Wednesday, April 30, 2025 4:11 AM
> To: gcc-patches@gcc.gnu.org; Liu, Hongtao ;
> ro...@nextmovesoftware.com; ubiz...@gmail.com
> Subject: Make ix86 cost of VEC_SELECT equivalent to SUBREG same as of
> SUBREG
Hi,
this patch (partly) solves problem in PR119900 where changing ix86_size_cost
of chap SSE instruction from 2 bytes to 4 bytes regresses imagemagick with PGO
(119% on core and 54% on Zen)
There is an interesting chain of problems
1) the train run of the SPEC2017 imagick is wrong and it does not
