[cfe-commits] [PATCH] Add -ffp-contract option.

Meador Inge meadori at codesourcery.com
Mon Jul 2 16:52:56 PDT 2012

Attaching the patch might help the review ;-)

On Jul 2, 2012, at 4:43 PM, Lang Hames wrote:

> Hi All,
> The attached patch adds a -ffp-contract=<style> option which (mostly) follows the behavior of GCC's option. Styles are 'fast', for aggressive FMA formation, 'on' for FP_CONTRACT compliance, and 'off' for no FMA formation (in the future this might be relaxed to FMA formation in cases where the result is provably unaffected).
> Feedback would be welcome. In particular, I have toggled the fp-contract style based on the ffast-math option in Clang::ConstructJob(...) in lib/Driver/Tools.cpp. Is that the right place to do that kind of option fiddling? (It seems to be where the other fast-math related floating point options get handled).
> Cheers,
> Lang.

Meador Inge
CodeSourcery / Mentor Embedded

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