https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111820
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Looks to be the vectorizer:
#0 0x00000000012d1fe5 in wide_int_storage::operator= (x=..., this=<optimized
out>) at /home/apinski/src/upstream-gcc-git/gcc/gcc/wide-int.h:1221
#1 generic_wide_int<wide_int_storage>::operator= (this=<optimized out>) at
/home/apinski/src/upstream-gcc-git/gcc/gcc/wide-int.h:775
#2 vect_peel_nonlinear_iv_init (stmts=0x7fffffffd1c0,
init_expr=0x7ffff79dbbd0, skip_niters=<optimized out>,
step_expr=0x7ffff79bad38, induction_type=<optimized out>) at
/home/apinski/src/upstream-gcc-git/gcc/gcc/tree-vect-loop.cc:9138
#3 0x00000000012f5322 in vect_update_ivs_after_vectorizer
(loop_vinfo=0x3181a90, niters=0x7ffff79e60c0, update_e=0x7ffff79d5ba0) at
/home/apinski/src/upstream-gcc-git/gcc/gcc/tree-vect-loop-manip.cc:2028
#4 0x00000000012fec74 in vect_do_peeling
(loop_vinfo=loop_vinfo@entry=0x3181a90, niters=<optimized out>,
niters@entry=0x7ffff79bad50, nitersm1=nitersm1@entry=0x7ffff79e0b40,
niters_vector=niters_vector@entry=0x7fffffffd700,
step_vector=step_vector@entry=0x7fffffffd708,
niters_vector_mult_vf_var=niters_vector_mult_vf_var@entry=0x7fffffffd710,
th=<optimized out>, check_profitability=<optimized out>,
niters_no_overflow=<optimized out>, advance=<optimized out>) at
/home/apinski/src/upstream-gcc-git/gcc/gcc/tree-vect-loop-manip.cc:3370
#5 0x00000000012f01a9 in vect_transform_loop
(loop_vinfo=loop_vinfo@entry=0x3181a90,
loop_vectorized_call=loop_vectorized_call@entry=0x0) at
/home/apinski/src/upstream-gcc-git/gcc/gcc/tree-vect-loop.cc:11386
#6 0x0000000001331bec in vect_transform_loops (simduid_to_vf_htab=<optimized
out>, loop=0x7ffff78054b0, loop_vectorized_call=0x0, fun=<optimized out>) at
/home/apinski/src/upstream-gcc-git/gcc/gcc/tree-vectorizer.cc:1004
#7 0x00000000013321ed in try_vectorize_loop_1 (fun=0x7ffff79d6000,
loop_dist_alias_call=0x0, loop_vectorized_call=0x0, loop=0x7ffff78054b0,
num_vectorized_loops=0x7fffffffdacc, simduid_to_vf_htab=@0x7fffffffdad0: 0x0)
at /home/apinski/src/upstream-gcc-git/gcc/gcc/tree-vectorizer.cc:1150
#8 try_vectorize_loop (simduid_to_vf_htab=@0x7fffffffdad0: 0x0,
num_vectorized_loops=0x7fffffffdacc, loop=0x7ffff78054b0, fun=0x7ffff79d6000)
at /home/apinski/src/upstream-gcc-git/gcc/gcc/tree-vectorizer.cc:1180
#9 0x0000000001332845 in (anonymous namespace)::pass_vectorize::execute
(this=<optimized out>, fun=0x7ffff79d6000) at
/home/apinski/src/upstream-gcc-git/gcc/gcc/tree-vectorizer.cc:1296
