[Bug tree-optimization/45260] [4.5/4.6 Regression] g++4.5: -prefetch-loop-arrays internal compiler error: in verify_expr, at tree-cfg.c:2541

[changpeng dot fang at amd dot com]

------- Comment #3 from changpeng dot fang at amd dot com  2010-08-12 00:38 -------
(In reply to comment #2)
> It was caused by revision 153878:
> 
> http://gcc.gnu.org/ml/gcc-cvs/2009-11/msg00094.html
> 

I think the same patch was also committed to 4.4 branch.
Maybe some prefetch work(s) in 4.5 triggered the bug.  

> and disappeared with revision 159514:
> 
> http://gcc.gnu.org/ml/gcc-cvs/2010-05/msg00566.html
> 
> I am not if it really fixed the bug.
> 

This could not be a valid fix, because it just disable some prefetches
based on performance concern.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45260