Re: -fno-strength-reduce
Marc Espie (espie@quatramaran.ens.fr)
Sat, 23 Jan 1999 01:33:05 +0100
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 ?
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