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Re: What is acceptable for -ffast-math? A numerical viewpoint
- To: dewar at gnat dot com, guerby at acm dot org
- Subject: Re: What is acceptable for -ffast-math? A numerical viewpoint
- From: dewar at gnat dot com
- Date: Sun, 5 Aug 2001 08:48:05 -0400 (EDT)
- Cc: gcc at gcc dot gnu dot org, jthorn at galileo dot thp dot univie dot ac dot at
<<3. unless 2 showed up unfixable practical problems, the optimization
is enabled under -funsafe-fast-math
Do you actively oppose to this proposal?
Yes, it should also be the case that the field testing should show that
there is some gain. There is no point in having non-"correctness"
preserving transformations unless there is at least some evidence of
an advantage. Probably the best thing is to first put in the optimization
under its own special switch. Then if there is a real gain, and no
unacceptable surprises, then it can be made part of -ffast-math.