https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109907
--- Comment #11 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
I tried with the test case, but the expensive shifts are still there except for
the cset_32bit30_not case, which improved as noted above.
cset_32bit30 however goes from the 3-instruction code to:
cset_32bit30:
movw r26,r24 ; 19 [c=4 l=2] *movsi/0
movw r24,r22
ldi r18,30 ; 26 [c=44 l=7] *lshrsi3_const/3
1:
lsr r27
ror r26
ror r25
ror r24
dec r18
brne 1b
andi r24,lo8(1) ; 21 [c=4 l=1] *andqi3/1
ret ; 24 [c=0 l=1] return
So we are back where we started? All except one case use expensive shift.
