lkml.org 
[lkml]   [1999]   [Jan]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: -fno-strength-reduce
In article <19990122154207.A6697@wogglebug.cygnus.com> meissner wrote:
>My personnel opinion is that strength reduction should be disabled on register
>limited machines like the x86 family, since the gains that come from losing the
>multiply are lost due to the additional register pressure the extra register
>uses. However, I lost that battle many years ago (RMS wanted -O2 to be
>consistant across machines), and have not opened it up much since then.

Does this still apply to the recent batch of egcs-current ?
I've been happily surprised to see that egcs-current actually outputs
better code than 2.8.1 on x86 in many situations, so maybe it also does
a better job of deciding when to apply strength reduction on
SMALL REGISTER CLASSES ?

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:49    [W:0.084 / U:0.316 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site