From: Igor Schein <igor@txc.com>
To: help-gcc@gnu.org
Subject: -funroll-all-loops
Date: Sat, 01 Apr 2000 00:00:00 -0000 [thread overview]
Message-ID: <20000107200836.G21972@dione.txc.com> (raw)
Message-ID: <20000401000000.CEjZcHXGSn9V9kvZ1xyVIUmZLAVDbfBZp31BNVDvwzk@z> (raw)
Hi,
I have a question about the following segment of info pages
for gcc:
`-funroll-all-loops'
Perform the optimization of loop unrolling. This is done for all
loops and usually makes programs run more slowly.
`-funroll-all-loops' implies `-fstrength-reduce' as well as
`-frerun-cse-after-loop'.
Does
"usually makes programs run more slowly"
imply
"however, for some rare cases it _will_ make them run faster"?
If it doesn't, then I don't see a point of using this flag at all.
Thanks
Igor
next reply other threads:[~2000-04-01 0:00 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-01-07 17:07 Igor Schein [this message]
2000-04-01 0:00 ` -funroll-all-loops Igor Schein
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