[RFD] -ffinite-math-only.

[Toon Moene]

Gabriel Dos Reis wrote:

> Toon Moene <toon@moene.indiv.nluug.nl> writes:

> | [1  <text/plain; us-ascii (7bit)>]
> | Often, one knows that a program won't generate (or consume) NaNs and
> | Infinities; it would be nice if the compiler could be told about that fact.
> |
> | The patch below implements -ffinite-math-only, which does just that.
> | The Fortran front-end sets it by default, as there is no way to generate a
> | NaN or an Infinity in Fortran without invoking undefined behaviour.
> |
> | Would this be a useful addition to GCC ?

> Oh, yes I vote for it.  Additionally, it would be helpful it that
> options is reflected in a CPP define (__FINITE_MATH_ONLY__?) so that
> loosely coupled libraries like libstdc++-v3 could take advantages of
> it.

If we can agree on the name, that's an easy addition for me to make.

Thanks,

-- 
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