https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92371
Bug ID: 92371
Summary: ice in info_for_reduction, at tree-vect-loop.c:4106
Product: gcc
Version: 10.0
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:
a, b;
d() {
int c = sizeof(int);
for (; a; a++)
c *= sizeof(int);
c *= sizeof(int);
b = c;
}
on recent gcc trunk with compiler flag -O3, does this:
/home/dcb/gcc/results/bin/gcc -c -O3 bug560.c
during GIMPLE pass: vect
bug560.c: In function ‘d’:
bug560.c:2:6: internal compiler error: in info_for_reduction, at
tree-vect-loop.c:4106
2 | void d() {
| ^
0x7124e4 info_for_reduction(_stmt_vec_info*)
../../trunk/gcc/tree-vect-loop.c:4106
0x10f9326 vectorizable_live_operation(_stmt_vec_info*, gimple_stmt_iterator*,
_slp_tree*, _slp_instance*, int, bool, vec<stmt_info_for_cost, va_heap,
vl_ptr>*)
../../trunk/gcc/tree-vect-loop.c:7562
0x10ec93f can_vectorize_live_stmts
../../trunk/gcc/tree-vect-stmts.c:10612
0x10ec93f can_vectorize_live_stmts
../../trunk/gcc/tree-vect-stmts.c:10593
The bug seems to first appear sometime between revision 277600 and
277650.
