Hello,

> On Sunday 27 March 2005 04:45, Canqun Yang wrote:
> > Another question is why the new RTL loop-unroller does
> > not support giv splitting.
> 
> Apparently because for most people it is not a problem that it does
> not do it, and while you have indicated earlier that it may be useful
> for you, you have neither tried to implement it yourself, nor provided
> a test case to PR20376.
> 
> FWIW you could try -fweb and see if it does what you want.  And if it
> does, you could write a limited webizer patch that works on just loop
> bodies after unrolling.

from what I understood, change to analyze_iv_to_split_insn that would
detect memory references should suffice.  Also maybe this patch might be
relevant:

http://gcc.gnu.org/ml/gcc-patches/2004-10/msg01176.html

Zdenek

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