[Bug tree-optimization/17679] [4.0 Regression] Aliasing problem with ivopts

[rakdver at atrey dot karlin dot mff dot cuni dot cz]

------- Additional Comments From rakdver at atrey dot karlin dot mff dot cuni dot cz  2004-09-26 17:33 -------
Subject: Re:  [4.0 Regression] Aliasing problem with ivopts

Hello,

> As I said in another bug, this really should not be done with the
> subtraction at all, on PPC at least it is better to have different
> IV's for the arrays.

I do not think the memory reference would get expressed in this way on
PPC (if it does, it is a bug in cost function for ivopts and please
create a bugreport for it).  However on i686 this seems to be the best
option, taking the register pressure into account.

Zdenek


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17679