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[withdrawn] Re: Suggestion: Add -ffast-math to default BOOT_CFLAGS
- From: Kelley Cook <kcook34 at ford dot com>
- To: Richard Henderson <rth at redhat dot com>
- Cc: GCC Mailing List <gcc at gcc dot gnu dot org>, Nathanael Nerode <neroden at twcny dot rr dot com>
- Date: Wed, 21 Jan 2004 12:16:33 -0500
- Subject: [withdrawn] Re: Suggestion: Add -ffast-math to default BOOT_CFLAGS
- Hop-count: 1
- Reply-to: Kelley Cook <kelleycook at yahoo dot com>
Richard Henderson wrote:
>> life analysis 4.94 4.02 -0.92
>> name lookup 8.83 8.35 -0.48
>> garbage collection 5.98 5.83 -0.15
>
> Where, pray, is the floating point in these passes
> that would be affected by -ffast-math at all?
>
>> AFAIK there isn't any, which makes your numbers
>> highly suspicious.
>>
You, of course, were right to be suspicious.
I have determined that I was comparing the fully bootstrapped ffast-math
build to a build that just had "make all" performed on it from GCC 3.3.
Rerunning the test indicates that if there are any differences between
using -ffast-math or not to be lost in noise.
Patch idea withdrawn.
KC