GCC Benchmarks (coybench), AMD64 and i686, 14 August 2004

[Richard Kenner]

    The trig identity that 2*sin(x)*cos(x) is sin(2*x) is more iffy; we'd
    waste time trying to apply such transformations to every tree, and
    it's pretty much exactly what caused such controversy when everyone
    did it to Whetstone.

Although I agree with you in general about tuning to benchmarks, I disagree
with the above.  When you consider some of the even more obscure cases in
both tree and RTL folding, that doesn't seem so peculiar anymore.