------- Comment #5 from rakdver at atrey dot karlin dot mff dot cuni dot cz 2006-05-28 14:25 ------- Subject: Re: Reverse loop order for increased efficiency
> ------- Comment #4 from tkoenig at gcc dot gnu dot org 2006-05-28 14:10 > ------- > (In reply to comment #3) > > Dunno if tree loop reversal is already there, but Zdenek probably likes to > > know > > what bugs he is fixing... > > Loop reversal doesn't occur yet. > > gcc version 4.2.0 20060521 (experimental) gives us: > > L4: > movl (%ecx), %eax > addl $1, %ebx > addl %edi, %ecx > movl %eax, (%edx) > addl %esi, %edx > cmpl 16(%ebp), %ebx > jne L4 loop reversal was removed with the old loop optimizer; the tree level loop reversal patch (http://gcc.gnu.org/ml/gcc-patches/2006-01/msg01851.html) was not reviewed. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22041
