[Bug c/42522] [m68k] Wrong code generated with -O2/-O3

[ami_stuff at o2 dot pl]

------- Comment #5 from ami_stuff at o2 dot pl  2009-12-28 23:38 -------
I found which optimization doesn't work correctly on my config:

-O2 ("Unknown format"):

_flv_probe:
        clr.l d0
        rts
        .even

-O2 -fno-cse-follow-jumps (works OK):

_flv_probe:
        move.l 4(sp),a0
        move.l 4(a0),a0
        cmp.b #70,(a0)
        jeq L10
L7:
        clr.l d0
        rts
L10:
        cmp.b #76,1(a0)
        jne L7
        cmp.b #86,2(a0)
        jne L7
        cmp.b #4,3(a0)
        jhi L7
        tst.b 5(a0)
        jne L7
        move.l 5(a0),d0
        moveq #8,d1
        cmp.l d0,d1
        jcc L7
        moveq #100,d0
        rts
        .even


-- 

ami_stuff at o2 dot pl changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |major


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42522