Node* gen_subtype_check(Node* subklass, Node* superklass) {
MergeMemNode* mem = merged_memory();
Node* ctrl = control();
Node* n = Phase::gen_subtype_check(subklass, superklass, &ctrl, mem, &_gvn);
set_control(ctrl);
return n;
}
// Set unaliased memory
void set_memory(Node* c, uint alias_idx) { merged_memory()->set_memory_at(alias_idx, c); }