[Bug tree-optimization/17560] [4.0 Regression] Infinite recursion in tree-scalar-evolution with -Os

[dnovillo at redhat dot com]

------- Additional Comments From dnovillo at redhat dot com  2004-10-08 12:39 -------
Subject: Re:  [4.0 Regression] Infinite
	recursion in tree-scalar-evolution with -Os

On Fri, 2004-10-08 at 08:07, sebastian dot pop at cri dot ensmp dot fr
wrote:

> The problem is that we have a cycle "i_1 -> i_2 -> i_1" outside any
> loop, and I'm not sure about the semantics of this representation.  
> By the way, is this a valid SSA form?
> 
It is, but this graph is irreducible.  Block #3 is only reachable via a
back edge.  Or put it another way, block #4 is the entry block for two
different loops.


Diego.



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17560