https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82954
Bug ID: 82954
Summary: [8 regression] ICE in fold_binary_loc, at
fold-const.c:9061
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: trippels at gcc dot gnu.org
CC: jakub at gcc dot gnu.org
Target Milestone: ---
trippels@gcc67 ~ % cat stun.ii
struct A {
struct {
int __u6_addr8;
} __in6_u;
};
struct B {
B(A &);
};
unsigned a[0];
struct C {
B m_fn1() const;
};
B C::m_fn1() const {
A b;
unsigned *c = reinterpret_cast<unsigned *>(b.__in6_u.__u6_addr8);
c[0] = c[0] ^ 1;
c[1] = c[1] ^ 1;
c[2] = c[2] ^ a[0];
c[3] = c[3] ^ a[1];
return b;
}
trippels@gcc67 ~ % g++ -O2 -c stun.ii
during GIMPLE pass: store-merging
stun.ii: In member function ‘B C::m_fn1() const’:
stun.ii:13:3: internal compiler error: in fold_binary_loc, at fold-const.c:9061
B C::m_fn1() const {
^
0xa96e20 fold_binary_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*)
../../gcc/gcc/fold-const.c:9058
0xa9d9da fold_build2_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*)
../../gcc/gcc/fold-const.c:12114
0x1524096 output_merged_store
../../gcc/gcc/gimple-ssa-store-merging.c:1873
0x1525d24 output_merged_stores
../../gcc/gcc/gimple-ssa-store-merging.c:2066
0x1525d24 terminate_and_process_chain
../../gcc/gcc/gimple-ssa-store-merging.c:2104
0x1525d24 terminate_and_release_chain
../../gcc/gcc/gimple-ssa-store-merging.c:996
0x1526234 terminate_all_aliasing_chains
../../gcc/gcc/gimple-ssa-store-merging.c:979
0x152684c process_store
../../gcc/gcc/gimple-ssa-store-merging.c:2403
0x152684c execute
../../gcc/gcc/gimple-ssa-store-merging.c:2511
