optimization/2100: -fstrength-reduce (is active with -O2) produces wrong code

[Franz Sirl]

At 13:24 02.04.2002, Richard Henderson wrote:
>On Tue, Apr 02, 2002 at 01:07:58PM +0200, Franz Sirl wrote:
> > Is this really fixed now? See your comment in
> > <http://gcc.gnu.org/ml/gcc-patches/2001-11/msg02150.html>, that's the
> > reason I didn't close this one yet, though I should have added 
> something to
> > the PR :-(.
>
>Hum.  Wish I'd seen that earlier.
>
>It might be fixed anyway -- there have been several fixes in
>this area over the last couple of months.  It'd be nice to
>back out Jan's cost tweek and see what happens under the hood.
>
>Do you have time to do that?

Yeah, I'll test it later today. Maybe at least the testcase should be 
added, so we'll notice when it reappears.

BTW, if it reappears with the cost tweek backed out, do you have a (branch) 
preference on any of the suggested possible fixes in the PR?

Franz.