From: Stephen Leake <Stephen.Leake@gsfc.nasa.gov>
Subject: Re: Ada vs. C: performance, size
Date: 1997/01/10
Date: 1997-01-10T00:00:00+00:00 [thread overview]
Message-ID: <32D646A7.1AEF@gsfc.nasa.gov> (raw)
In-Reply-To: dewar.852893008@merv
Just an anecdote: for a UT69R00 target, I have some C code that aborts
the gcc compiler when using -O0, but not with -O2. The problem is that
the register allocator runs out of registers! This is a VERY simple
chip, without even indexed addressing, so gcc gives up. But with -O2, it
does a much better job of figuring out how to use the registers
efficiently, and can compile successfully.
If anyone has had a similar experience with a gcc port, I'd like to hear
about it, particularly if you have any advice on how to make it better!
--
- Stephe
next prev parent reply other threads:[~1997-01-10 0:00 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
1997-01-09 0:00 Ada vs. C: performance, size W. Wesley Groleau (Wes)
1997-01-10 0:00 ` Robert Dewar
1997-01-10 0:00 ` Stephen Leake [this message]
1997-01-13 0:00 ` Richard A. O'Keefe
-- strict thread matches above, loose matches on Subject: below --
1997-01-09 0:00 W. Wesley Groleau (Wes)
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