https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103194
Bug ID: 103194
Summary: ice in optimize_atomic_bit_test_and, at
tree-ssa-ccp.c:3626
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Target Milestone: ---
For this C code:
long pscc_a_2_3;
int pscc_a_1_4;
void pscc()
{
pscc_a_1_4 = __sync_fetch_and_and(&pscc_a_2_3, 1);
}
compiled by recent gcc trunk, does this:
$ /home/dcb/gcc/results/bin/gcc -c -O1 bug771.c
during GIMPLE pass: fab
bug771.c: In function ‘pscc’:
bug771.c:3:6: internal compiler error: in optimize_atomic_bit_test_and, at
tree-ssa-ccp.c:3626
3 | void pscc()
| ^~~~
0xee6020 optimize_atomic_bit_test_and(gimple_stmt_iterator*, internal_fn, bool,
bool)
../../trunk.git/gcc/tree-ssa-ccp.c:3626
0xee389a (anonymous namespace)::pass_fold_builtins::execute(function*)
../../trunk.git/gcc/tree-ssa-ccp.c:0
The bug first seems to occur sometime between git hash f2572a398d21fd52
and a97fdde627e64202,a distance of some 60 commits.
In that range, commit fb161782545224f55ba26ba663889c5e6e9a04d1
looks a likely candidate.
