[Bug middle-end/91858] [9/10 Regression] Compile time hog w/ complex float trigonometric functions

[vincent-gcc at vinc17 dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91858

--- Comment #5 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
I can reproduce the issue on my Debian machine. Do you know which values are
passed to MPC?

I've tried with

  mpc_init2 (x, 24);
  mpc_init2 (y, 24);
  mpc_set_ui_ui (x, 10000, 10000, MPC_RNDNN);
  mpc_tan (y, x, MPC_RNDNN);

including with a reduced exponent range, but this is very fast. And according
to ldd, the same versions of the GMP/MPFR/MPC libraries are used here with both
GCC and my MPC test.