<div dir="ltr"><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Aug 6, 2014 at 2:37 AM, James Molloy <span dir="ltr"><<a href="mailto:james@jamesmolloy.co.uk" target="_blank">james@jamesmolloy.co.uk</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi Hal,<div><br></div><div>I ran some numbers on Cortex-A57 (AArch64 mode) with the SLP and Loop vectorizers swapped and with your noalias metadata enabled. I see no change outside of noise. I ran SPEC(2000+2006) and EEMBC - LNT is currently unusable on our hardware due to lack of "perf" - it's just too noisy :(</div>
<div><br></div><div>Can someone try a test on x86? If that shows the same, we should be in a good position to swap the ordering as soon as you enable noalias metadata by default.</div></div></blockquote></div><br>Can you set everything up so that there is a flag that makes this switch? Or is there already one I missed?</div>
<div class="gmail_extra"><br></div><div class="gmail_extra">Once I have flags, its easy for me to test. I can test both just the AA metadata, and then AA metadata + vectorize rearrangement.</div></div>