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3.3 vs 3.1 on powerpc
- From: Brad Lucier <lucier at math dot purdue dot edu>
- To: gcc at gcc dot gnu dot org
- Cc: lucier at math dot purdue dot edu (Brad Lucier), feeley at iro dot umontreal dot ca
- Date: Thu, 21 Nov 2002 21:18:42 -0500 (EST)
- Subject: 3.3 vs 3.1 on powerpc
I've been doing some tests of 3.3 versus (Apple's) 3.1 on PowerPC Darwin.
With -fnew-ra and the new scheduler, I'm expecting 3.3 to kick serious butt
compared to 3.1 on some of my floating-point codes---studying the scheduler
output indicates a 50%+ improvement when scheduled for -mcpu=7400. (For
some reason, the scheduler has a more difficult time with -mcpu=7450.)
Some of this speedup results from fewer spills.
Unfortunately, I can't figure out how to get mainline 3.3 to accept some
of Apple's headers, so I can't actually run anything yet ... ;-).
Brad