[tree-ssa] (analysis) bootstrap failure on armv5l-linux

[Jeroen Dobbelaere]

Diego Novillo wrote:

>On Fri, 2003-06-13 at 17:45, Jeroen Dobbelaere wrote:
>  
>
>>Hi,
>>
>>I've been looking to the problem, and this is what I see happening :
>>
>>In toplev.c, we do optimization of 'basic block reordening' (bbro) :
>>
>>    
>>
>Jeroen,
>
>Just to make sure, this failure doesn't occur in mainline, right?  The
>

Yes, that's correct.

>failure is not in the tree optimizers, though I seem to remember you
>mentioning that it only happened in tree-ssa.
>  
>
It is possible that this just shows a latent bug in 'merge_blocks', 
depending on the exact definition
of 'live at entry', 'live at exit' and how this data should be updated 
after a merger.
In this specific case, it seems to be assumed that the liveness data 
stays identical (which isn't).

>
>Diego.
>
>
>  
>
Greetings,

Jeroen Dobbelaere