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Re: PATCH - [tree-ssa] regrouping of expression tree for single multiply add.
- From: Dale Johannesen <dalej at apple dot com>
- To: law at redhat dot com
- Cc: Roger Sayle <roger at eyesopen dot com>, Fariborz Jahanian <fjahanian at apple dot com>, Diego Novillo <dnovillo at redhat dot com>, Dale Johannesen <dalej at apple dot com>, "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>
- Date: Thu, 25 Mar 2004 16:09:25 -0800
- Subject: Re: PATCH - [tree-ssa] regrouping of expression tree for single multiply add.
- References: <200403260000.i2Q006MS004354@speedy.slc.redhat.com>
On Mar 25, 2004, at 4:00 PM, law@redhat.com wrote:
In message <A2195074-7EB6-11D8-8C7F-000A95D7CD40@apple.com>, Dale
Johannesen wr
ites:
Well, there's an argument against it, all right, but the view that
it's
excellent
appears to be a minority one. It's clear that quite a few people find
such
transformations useful. Those of you who want standard-conforming
behavior
don't have to use -ffast-math, after all.
OR, those who do not want standard conforming code probably ought to be
using -ffast-math. I *much* prefer to keep the compiler standards
conforming.
I think there is general agreement on that (without -ffast-math).
But Fariborz's change is done only with flag_unsafe_math_optimizations.