[Bug tree-optimization/88074] [7/8/9 Regression] g++ hangs on math expression

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88074

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
C testcase:

#include <complex.h>

int main()
{
  _Complex double x;
  __real x = 3.09126495087690770626068115234375e+8;
  __imag x = -4.045689747817175388336181640625e+8;
  volatile _Complex double y = ctan (x);
  return 0;
}