[Bug c/85000] ICE in copy_reference_ops_from_ref, at tree-ssa-sccvn.c:895

[gscfq@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85000

--- Comment #1 from G. Steinmetz <gscfq@t-online.de> ---

Configured with --enable-checking=yes :


$ gcc-8-20180318 -c z1.c -O2 -fopenmp
during GIMPLE pass: omplower
z1.c: In function 'foo':
z1.c:8:6: internal compiler error: in scan_omp_1_op, at omp-low.c:3014
     n++;
     ~^~
0xb3f192 scan_omp_1_op
        ../../gcc/omp-low.c:3014
0xf66e22 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node*
(*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*,
hash_set<tree_node*, default_hash_traits<tree_node*> >*))
        ../../gcc/tree.c:11387
0xf67276 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node*
(*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*,
hash_set<tree_node*, default_hash_traits<tree_node*> >*))
        ../../gcc/tree.c:11703
0x9c00f0 walk_gimple_op(gimple*, tree_node* (*)(tree_node**, int*, void*),
walk_stmt_info*)
        ../../gcc/gimple-walk.c:203
0x9c072c walk_gimple_stmt(gimple_stmt_iterator*, tree_node*
(*)(gimple_stmt_iterator*, bool*, walk_stmt_info*), tree_node* (*)(tree_node**,
int*, void*), walk_stmt_info*)
        ../../gcc/gimple-walk.c:586
0x9c0918 walk_gimple_seq_mod(gimple**, tree_node* (*)(gimple_stmt_iterator*,
bool*, walk_stmt_info*), tree_node* (*)(tree_node**, int*, void*),
walk_stmt_info*)
        ../../gcc/gimple-walk.c:51
0x9c07d2 walk_gimple_stmt(gimple_stmt_iterator*, tree_node*
(*)(gimple_stmt_iterator*, bool*, walk_stmt_info*), tree_node* (*)(tree_node**,
int*, void*), walk_stmt_info*)
        ../../gcc/gimple-walk.c:596
0x9c0918 walk_gimple_seq_mod(gimple**, tree_node* (*)(gimple_stmt_iterator*,
bool*, walk_stmt_info*), tree_node* (*)(tree_node**, int*, void*),
walk_stmt_info*)
        ../../gcc/gimple-walk.c:51
0x9c07d2 walk_gimple_stmt(gimple_stmt_iterator*, tree_node*
(*)(gimple_stmt_iterator*, bool*, walk_stmt_info*), tree_node* (*)(tree_node**,
int*, void*), walk_stmt_info*)
        ../../gcc/gimple-walk.c:596
0x9c0918 walk_gimple_seq_mod(gimple**, tree_node* (*)(gimple_stmt_iterator*,
bool*, walk_stmt_info*), tree_node* (*)(tree_node**, int*, void*),
walk_stmt_info*)
        ../../gcc/gimple-walk.c:51
0xb3e169 scan_omp
        ../../gcc/omp-low.c:3205
0xb4a50a scan_omp_parallel
        ../../gcc/omp-low.c:1796
0xb4a50a scan_omp_1_stmt
        ../../gcc/omp-low.c:3123
0x9c06fa walk_gimple_stmt(gimple_stmt_iterator*, tree_node*
(*)(gimple_stmt_iterator*, bool*, walk_stmt_info*), tree_node* (*)(tree_node**,
int*, void*), walk_stmt_info*)
        ../../gcc/gimple-walk.c:568
0x9c0918 walk_gimple_seq_mod(gimple**, tree_node* (*)(gimple_stmt_iterator*,
bool*, walk_stmt_info*), tree_node* (*)(tree_node**, int*, void*),
walk_stmt_info*)
        ../../gcc/gimple-walk.c:51
0x9c07d2 walk_gimple_stmt(gimple_stmt_iterator*, tree_node*
(*)(gimple_stmt_iterator*, bool*, walk_stmt_info*), tree_node* (*)(tree_node**,
int*, void*), walk_stmt_info*)
        ../../gcc/gimple-walk.c:596
0x9c0918 walk_gimple_seq_mod(gimple**, tree_node* (*)(gimple_stmt_iterator*,
bool*, walk_stmt_info*), tree_node* (*)(tree_node**, int*, void*),
walk_stmt_info*)
        ../../gcc/gimple-walk.c:51
0xb3e169 scan_omp
        ../../gcc/omp-low.c:3205
0xb5460a execute_lower_omp
        ../../gcc/omp-low.c:8999
0xb5460a execute
        ../../gcc/omp-low.c:9056