x86 regression: optimizer bug in 1.1 and dev

[Ulrich Drepper]

law@cygnus.com (Jeffrey A Law) writes:

>   > Is this something that we should always be adding to our compile flags
>   > on x86?
> It's a subject of great debate.
> 
> I've been told (and believe) it has severe impacts on x86 performance.

The impact is huge so it never should be enabled by default.  If you
are doing numeric computations on ix86 (not a wise choice) you have to
be aware of the risks and the gcc features.

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