https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88074
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm, we never return from __gmpn_sqr_basecase_x86_64 ...
#0 0x00007ffff734b92b in __gmpn_addlsh2_n_x86_64 ()
from /usr/lib64/libgmp.so.10
#1 0x000000000000004c in ?? ()
#2 0x00007fffffff2c50 in ?? ()
#3 0x00007fffffff1448 in ?? ()
#4 0x0000000006107128 in ?? ()
#5 0x00007ffff73756ef in __gmpn_toom_eval_dgr3_pm2 ()
from /usr/lib64/libgmp.so.10
#6 0x00007ffff736d6fb in __gmpn_toom44_mul () from /usr/lib64/libgmp.so.10
#7 0x00007ffff7358283 in __gmpn_mul_n () from /usr/lib64/libgmp.so.10
#8 0x00007ffff7356ea5 in ?? () from /usr/lib64/libgmp.so.10
#9 0x00007ffff7357183 in ?? () from /usr/lib64/libgmp.so.10
#10 0x00007ffff7357ecf in __gmpn_mul_fft () from /usr/lib64/libgmp.so.10
#11 0x00007ffff737a7cf in __gmpn_mulmod_bnm1 () from /usr/lib64/libgmp.so.10
#12 0x00007ffff7358654 in __gmpn_nussbaumer_mul () from /usr/lib64/libgmp.so.10
#13 0x00007ffff735829e in __gmpn_mul_n () from /usr/lib64/libgmp.so.10
#14 0x00007ffff7354adc in __gmpn_mul () from /usr/lib64/libgmp.so.10
#15 0x00007ffff733f62d in __gmpz_mul () from /usr/lib64/libgmp.so.10
#16 0x00007ffff75d4f23 in ?? () from /usr/lib64/libmpfr.so.4
#17 0x00007ffff75d563d in mpfr_sincos_fast () from /usr/lib64/libmpfr.so.4
#18 0x00007ffff75d5c8c in mpfr_sin_cos () from /usr/lib64/libmpfr.so.4
#19 0x00007ffff7810b79 in mpc_sin_cos () from /usr/lib64/libmpc.so.3
#20 0x00007ffff78138ab in mpc_tan () from /usr/lib64/libmpc.so.3
#21 0x0000000000f4b723 in do_mpc_arg1 (result_real=0x7fffffffcc80,
result_imag=0x7fffffffcca0, func=0x87fd20 <mpc_tan@plt>,
arg_real=0x7ffff4c67ee0, arg_imag=0x7ffff4c67ec0,
format=0x24e3780 <ieee_double_format>)
at /space/rguenther/src/gcc-slpcost/gcc/fold-const-call.c:346
#22 0x0000000000f4da4a in fold_const_call_cc (result_real=0x7fffffffcc80,
result_imag=0x7fffffffcca0, fn=CFN_BUILT_IN_CTAN, arg_real=0x7ffff4c67ee0,
arg_imag=0x7ffff4c67ec0, format=0x24e3780 <ieee_double_format>)
at /space/rguenther/src/gcc-slpcost/gcc/fold-const-call.c:1051
when folding CTAN of __complex__ (3.09126495087690770626068115234375e+8,
-4.045689747817175388336181640625e+8)
