[aarch64-port-dev ] RFR: 8252259: AArch64: Adjust default value of FLOATPRESSURE

[Joshua Zhu]

Andrew, thanks a lot for your review.
Ningsheng, could you please help push this change?

Best Regards,
Joshua

> -----Original Message-----
> From: Andrew Haley <aph at redhat.com>
> Sent: 2020年8月25日 19:53
> To: Joshua Zhu <yueshi.zwj at alibaba-inc.com>; hotspot-compiler-
> dev at openjdk.java.net
> Cc: aarch64-port-dev at openjdk.java.net
> Subject: Re: [aarch64-port-dev ] RFR: 8252259: AArch64: Adjust default value of
> FLOATPRESSURE
> 
> On 25/08/2020 07:03, Joshua Zhu wrote:
> > Therefore I propose the default value of FLOATPRESSURE be 32 because
> > there are 32 float/SIMD registers on aarch64 and also the value of
> > register pressure is the same as 1 for each LRG of
> > Op_RegL/Op_RegD/Op_Vec. [3]
> >
> > Could you please help review this change?
> >
> > JBS: https://bugs.openjdk.java.net/browse/JDK-8252259
> > Webrev: http://cr.openjdk.java.net/~jzhu/8252259/webrev.00/
> 
> Yes, thanks. I can't remember why FLOATPRESSURE is 64, but it certainly looks
> like 32 is a much more sensible value.
> 
> --
> Andrew Haley  (he/him)
> Java Platform Lead Engineer
> Red Hat UK Ltd. <https://www.redhat.com> https://keybase.io/andrewhaley
> EAC8 43EB D3EF DB98 CC77 2FAD A5CD 6035 332F A671