Re: GCC beaten by ICC in stupid trig test!

[Robert Dewar <dewar at gnat dot com>]

Roger Sayle wrote:

> May I remind everyone that the subject title "GCC beaten by ICC in
> stupid trig test!" refers to a posting by Scott Robert Ladd in which
> Intel's icc compiler generates floating point code 64x faster than
> gcc 3.3.3 (http://gcc.gnu.org/ml/gcc/2004-03/msg00634.html).
>
> Would anyone like to hazard a guess at how many floating point additions
> Intel icc v7 generates for the following function?  Even with icc's
> default arguments, i.e. "icc foo.c"?
>
> int foo(double a, double b, double c)
> {
>   return (a+b)+c == a+(b+c);
> }

If it is really true that icc treats this as true at compile
time in default mode, that's simply appalling in my view, and
not something gcc should copy!