[15] RFR(S): 8239009: C2: Don't use PSHUF to load scalars from memory on x86

[Dean Long]

How many bytes are we loading from memory after your change?

dl

On 2/13/20 8:04 AM, Vladimir Ivanov wrote:
> http://cr.openjdk.java.net/~vlivanov/8239009/webrev.00
> https://bugs.openjdk.java.net/browse/JDK-8239009
>
> Mem-to-reg variants of PSHUF instructions load 16 bytes from memory.
>
> Switch to reg-to-reg variants and perform scalar loads of proper size 
> instead.
>
> Testing: hs-precheckin-comp,hs-tier1,hs-tier2
>
> Thanks!
>
> Best regards,
> Vladimir Ivanov