deref check

ir/pointer.cpp

@@ -529,16 +529,16 @@ Pointer::isDereferenceable(const expr &bytes0, uint64_t align,
   DisjointExpr<expr> UB(expr(false)), is_aligned(expr(false)), all_ptrs;
 
   for (auto &[ptr_expr, domain] : DisjointExpr<expr>(p, 3)) {
-    Pointer ptr(m, ptr_expr);
+    auto [ptr, inboundsd] = Pointer(m, ptr_expr).toLogical();
     auto [ub, aligned] = ::is_dereferenceable(ptr, bytes_off, bytes, align,
                                               iswrite, ignore_accessability);
 
     // record pointer if not definitely unfeasible
     if (!ub.isFalse() && !aligned.isFalse() && !ptr.blockSize().isZero())
       all_ptrs.add(std::move(ptr).release(), domain);
 
-    UB.add(std::move(ub), domain);
-    is_aligned.add(std::move(aligned), domain);
+    UB.add(ub && inboundsd, domain);
+    is_aligned.add(std::move(aligned), std::move(domain));
   }
 
   AndExpr exprs;
@@ -833,16 +833,17 @@ Pointer::mkIf(const expr &cond, const Pointer &then, const Pointer &els) {
 }
 
 ostream& operator<<(ostream &os, const Pointer &p) {
+  auto logical = p.isLogical();
+
   if (p.isNull().isTrue())
-    return os << "null";
+    return os << (logical.isFalse() ? "0x0" : "null");
 
 #define P(field, fn)   \
   if (field.isConst()) \
     field.fn(os);      \
   else                 \
     os << field
 
-  auto logical = p.isLogical();
   os << (logical.isFalse() ? "phy-ptr(" : "pointer(");
 
   if (!logical.isFalse()) {