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Re: What is acceptable for -ffast-math? (Was: associative law in combine)
- To: "Gcc at Gcc dot Gnu. Org" <gcc at gcc dot gnu dot org>
- Subject: Re: What is acceptable for -ffast-math? (Was: associative law in combine)
- From: "Vincent Penquerc'h" <vincent at qubesoft dot com>
- Date: Thu, 2 Aug 2001 11:35:18 +0100
May I suggest breaking this into two separate topics, in an
attempt to avoid attribution of some arguments to the wrong
I think everyone is in agreement that -ffast-math should
not be enabled by default by -O. So I propose:
1: Should -ffast-math include transformations that can
under certain circumstances yield substantially different
results than the original code ?
2: What transformations should be allowed when -ffast-math
is *not* specified (eg the a/b/c example).