SuperWord::unrolling_analysis() question

Berg, Michael C michael.c.berg at
Thu Apr 28 18:09:44 UTC 2016

Ok, Roland that would be great, please do add it to your next changeset.


-----Original Message-----
From: Roland Westrelin [mailto:rwestrel at] 
Sent: Thursday, April 28, 2016 7:55 AM
To: Berg, Michael C <michael.c.berg at>
Cc: hotspot-compiler-dev at
Subject: Re: SuperWord::unrolling_analysis() question

Hi Michael,

> Roland, for superword.cpp you only need this one line as change, which 
> I have tested and for which has no negative side effects on x86.  It 
> will address the issue(oldly enough, its where we started):
> Line 201   int max_vector = Matcher::max_vector_size(T_BYTE);

Thanks for experimenting with this. That looks fine to me. I can make that change as part of the patch that enables superword unrolling analysis on aarch64 unless you'd like to do it as a separate change?


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