decrement_and_branch_until_zero pattern

[Andreas Schwab]

On Jun 07 2018, Paul Koning <paulkoning@comcast.net> wrote:

> None of these seem to use that loop optimization, with -O2 or -Os.  Did I
> miss some magic switch to turn on something else that isn't on by default?
> Or is this a feature that was broken long ago and not noticed?  If so, any
> hints where I might look for a reason?

commit 7d3c6452d7
Author: rakdver <rakdver@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Thu Mar 2 23:50:55 2006 +0000

            * loop.c: Removed.
    
    
    
    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@111650 138bc75d-0d04-0410-961f-82ee72b054a4

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
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