------- Comment #2 from dominiq at lps dot ens dot fr 2007-03-13 10:58 -------
Subject: Re: __builtin_cexpi is broken on Darwin
> you should not use __builtin_cexpi if neither sincos nor cexp is available.
Yes indeed, but an ICE is certainly not the best way to say it!
Now I have tested __builtin_cexpi, not because I want to use it, but because
it is used by the optimizer with a wrong result I would like to see fixed
ASAP.
Note that __builtin_cexp is available on Darwin and seems to work:
#include <math.h>
#include <stdio.h>
int main()
{
__complex__ double x;
__real__ x = -1.0;
__imag__ x = 0.0;
__complex__ double t = __builtin_clog(x);
double tmp = 0.5 * (__imag__ t);
x = __builtin_cexp(0.5*t);
printf("%g %g\n", (__real__ x), (__imag__ x));
printf("%g %g\n", cos(tmp), sin(tmp));
}
gives with gcc and with or without optimization:
6.12323e-17 1
6.12323e-17 1
while when compiled with g++ -O1, it gives:
6.12323e-17 1
-1 1.22465e-16
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31161
