[patch] for PR 26209

[Diego Novillo]

Zdenek Dvorak wrote:
> Hello,
> 
>>>>> 	PR tree-optimization/26209
>>>>> 	* tree-ssa-loop.c (pass_scev_cprop): Add TODO_cleanup_cfg.
>>>>> 	* tree-cfgcleanup.c (cleanup_control_flow): Remove dead
>>>>> 	eh edges.
>>>>> 	* tree-cfg.c (replace_uses_by): Do not alter cfg.
>>>>>
>>>> OK.
>>> FYI, I have bootstrapped/regtested this on
>>> {i386,x86_64,ia64,s390,s390x,ppc,ppc64}-linux, no regressions.
>> Unfortunately, it creates a regression on i386-linux, though
>> not in gcc testsuite:
> 
> this is already fixed in mainline.  The relevant part of the patch is
> 
It's OK to backport this secondary fix into 4.1, provided you get
approval from Mark.