[ignition] Eliminate hole checks where statically possible for loads and stores

src/ast/ast.cc

Index: src/ast/ast.cc
diff --git a/src/ast/ast.cc b/src/ast/ast.cc
index b52fb957e8b80f53250c43df6b59b5fbd85e89e6..906bd4a9c62d32f3247cbfa30197b07bb99277da 100644
--- a/src/ast/ast.cc
+++ b/src/ast/ast.cc
@@ -165,8 +165,9 @@ VariableProxy::VariableProxy(Variable* var, int start_position,
       end_position_(end_position),
       raw_name_(var->raw_name()),
       next_unresolved_(nullptr) {
-  bit_field_ |= IsThisField::encode(var->is_this()) |
-                IsAssignedField::encode(false) | IsResolvedField::encode(false);
+  bit_field_ |=
+      IsThisField::encode(var->is_this()) | IsAssignedField::encode(false) |
+      IsResolvedField::encode(false) | NeedsHoleCheckField::encode(false);
   BindTo(var);
 }
 
@@ -178,7 +179,9 @@ VariableProxy::VariableProxy(const AstRawString* name,
       raw_name_(name),
       next_unresolved_(nullptr) {
   bit_field_ |= IsThisField::encode(variable_kind == THIS_VARIABLE) |
-                IsAssignedField::encode(false) | IsResolvedField::encode(false);
+                IsAssignedField::encode(false) |
+                IsResolvedField::encode(false) |
+                NeedsHoleCheckField::encode(false);
 }
 
 VariableProxy::VariableProxy(const VariableProxy* copy_from)