[PATCH] PR 38201: -mfma/-mavx and -msse5/-msse4a don't work together

[Richard Guenther]

On Wed, Dec 10, 2008 at 3:39 AM, Ross Ridge <rridge@csclub.uwaterloo.ca> wrote:
> H.J. Lu writes:
>>Andrew recommended SSE5 FMA :-). The issue is the one you choose
>>today may not be the one you want tomorrow in which case such a gcc
>>is useless.
>
> I agree with H.J. Lu here, this isn't a choice that should be made
> arbitrarily.  The choice should be made by the user.  The last thing
> GCC needs is more undocumented behaviour that users unknowingly end up
> depending on.

But in this case the user chooses to let the compile choose.  HJs change results
in less choice for the user.

Richard.