Oleg Endo <[email protected]> wrote:
> In cases where dynamic shifts are available, the ashlsi3_d pattern is
> picked first and never converted back to a short sequence of constant
> shifts. Preferring short constant shift sequences over dynamic shifts
> can potentially reduce the need for an extra register to hold the shift
> count. CSiBE shows some code size increases and decreases with this
> patch. The increases seem to be due to some unlucky register
> allocations. Overall there is a small decrease (-312 bytes on the whole
> set for '-O2 -m4-single -ml -mpretend-cmove).
>
> Tested on rev 189916 with
> make -k check RUNTESTFLAGS="--target_board=sh-sim
> \{-m2/-ml,-m2/-mb,-m2a/-mb,-m2a-single/-mb,-m4/-ml,-m4/-mb,
> -m4-single/-ml,-m4-single/-mb,-m4a-single/-ml,-m4a-single/-mb}"
>
> and no new failures.
>
> OK?
OK.
Regards,
kaz
