JuliaLang/julia — comment on commit fce7c3c291bc505172de65d6bba44cce4ef29b5a
File:  line 0
By StefanKarpinski:

@JeffBezanson: this unfortunately didn't actually speed up the `printfd` benchmark at all when I reverted the relevant part of 8f752a9ecfbfeea56b81d645084b93cf8aa2b0af. I'm guessing that the fact that `flipsign` is a generic function that happens to use the `flipsign_int*` intrinsics for its implementation is defeating the ability of the intrinsics to emit the code for the constant y case.