I'm trying to copy gcc's behavior with the -ffast-math compiler flag into haskell's ghc compiler. The only documentation I can find about it is at:
https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html I understand how floating point operations work and have come up with a reasonable list of optimizations to perform. But I doubt it is exhaustive. My question is: where can I find all the gory details about what gcc will do with this flag? I'm perfectly willing to look at source code if that's what it takes. Also, are there any optimizations that you wish -ffast-math could perform, but for various architectural reasons they don't fit into gcc?
