lkml.org 
[lkml]   [2009]   [Jan]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: gcc inlining heuristics was Re: [PATCH -v7][RFC]: mutex: implement adaptive spinning


On Mon, 12 Jan 2009, H. Peter Anvin wrote:
>
> This is about storage allocation, not aliases. Storage allocation only
> depends on lifetime.

Well, the thing is, code motion does extend life-times, and if you think
you can move stores across each other (even when you can see that they
alias statically) due to type-based alias decisions, that does essentially
end up making what _used_ to be disjoint lifetimes now be potentially
overlapping.

Linus


\
 
 \ /
  Last update: 2009-01-12 20:49    [W:0.483 / U:0.732 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site