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Re: [PATCH] Remove forwarder blocks in tree-cfgcleanup even at -O0 if they don't change locations (PR debug/44205)

On Fri, May 21, 2010 at 10:33:10AM +0200, Richard Guenther wrote:
> On Fri, 21 May 2010, Jakub Jelinek wrote:
> Ok.

Thanks.

>  Is this a regression in 4.5 as we removed the useless pass
> which did some of the jump optimizations in 4.4?

Apparently it is a regression from 4.1/4.2/4.3 in 4.4/4.5/trunk.
Two changes broke this testcase: 1) first 4.3 started using cfglayout
mode even for -O0, but in 4.3 it still worked, as the jumps created
by outof_cfglayout didn't have any locus 2) then something in 4.4
made the jumps have a locus from the goto_locus edges.

So, ok for 4.4/4.5 too?  Have already bootstrapped/regtested
it in 4.4 on 6 linux arches.

	Jakub
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