https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112345
Bug ID: 112345
Summary: ice in mark_block_for_update
Product: gcc
Version: unknown
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:
int bail, test_block_move_end;
void test_block_move(my_cpu) {
int start;
int *p;
_Bool at_end = 0;
do {
if (test_block_move_end)
at_end = 1;
if (my_cpu)
continue;
do
write64();
while (p <= start && (p += 16));
if (bail)
;
} while (!at_end && ++start);
}
compiled by recent gcc trunk as follows:
$ ~/gcc/results/bin/gcc -c -w -g -O2 bug974.c
during GIMPLE pass: thread
bug974.c: In function ‘test_block_move’:
bug974.c:2:6: internal compiler error: Segmentation fault
2 | void test_block_move(my_cpu) {
| ^~~~~~~~~~~~~~~
0xebd2e9 crash_signal(int)
../../trunk.year/gcc/toplev.cc:315
0xf61718 mark_block_for_update(basic_block_def*)
../../trunk.year/gcc/tree-into-ssa.cc:451
0xf61ec2 mark_use_interesting(tree_node*, gimple*, basic_block_def*, bool)
../../trunk.year/gcc/tree-into-ssa.cc:2654
The bg first seems to occur sometime between g:8c40b72036c967fb
and g:9119b008b4195e06
