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Re: Optimzie brl to br for ia64
On Wed, Mar 12, 2003 at 05:09:26PM -0800, Richard Henderson wrote:
> On Wed, Mar 12, 2003 at 03:56:24PM -0800, H. J. Lu wrote:
> > On ia64, brl, which may be introduced by relaxation, can be optimized
> > to br. Here is a testcase:
>
> Ok, sure, but why bother? The cases in which one object file
> is that large, and yet the target is actually in range of a
> br is approximately nil. Plus, brl and br are the same speed
> on Itanium2, so I don't see what the effort would buy you.
>
I was told br had better branch predication accuracy on Itanium 2.
H.J.