On 8/29/22 16:15, Aldy Hernandez wrote:
But even with -ffinite-math-only, is there any benefit to propagating a known NAN? For example:
The original intent (in 2002) for the option -ffinite-math-only was for the optimizers to ignore all the various exceptions to common optimizations because they might not work correctly when presented with a NaN or an Inf.
I do not know what the effect for floating point range information would be - offhand.
But in the *spirit* of this option would be to ignore that the range [5.0, 5.0] would "also" contain NaN, for instance.
Kind regards, -- Toon Moene - e-mail: t...@moene.org - phone: +31 346 214290 Saturnushof 14, 3738 XG Maartensdijk, The Netherlands
