[Interpreter] Adds support for const/let variables to interpreter.

test/cctest/compiler/test-run-bytecode-graph-builder.cc

Index: test/cctest/compiler/test-run-bytecode-graph-builder.cc
diff --git a/test/cctest/compiler/test-run-bytecode-graph-builder.cc b/test/cctest/compiler/test-run-bytecode-graph-builder.cc
index 9a01eda0e109a6241c9ae63ea0cd517238990dc8..d9955bb550bce74f1a709a0e8ce48524531edb8d 100644
--- a/test/cctest/compiler/test-run-bytecode-graph-builder.cc
+++ b/test/cctest/compiler/test-run-bytecode-graph-builder.cc
@@ -2426,6 +2426,31 @@ TEST(JumpWithConstantsAndWideConstants) {
   }
 }
 
+TEST(JumpOnHole) {
+  HandleAndZoneScope scope;
+  Isolate* isolate = scope.main_isolate();
+  Zone* zone = scope.main_zone();
+  Factory* factory = isolate->factory();
+
+  // TODO(mythria): Add tests to check JumpIfHole. Initializing 'this' via super
+  // calls uses JumpIfHole.
+  ExpectedSnippet<0> snippets[] = {
+      {"let x = 1; x = 2; return x;", {factory->NewNumberFromInt(2)}},
+      {"const x = 3; return x;", {factory->NewNumberFromInt(3)}},
+  };
+
+  for (size_t i = 0; i < arraysize(snippets); i++) {
+    ScopedVector<char> script(1024);
+    SNPrintF(script, "function %s() { %s }\n%s();", kFunctionName,
+             snippets[i].code_snippet, kFunctionName);
+
+    BytecodeGraphTester tester(isolate, zone, script.start());
+    auto callable = tester.GetCallable<>();
+    Handle<Object> return_value = callable().ToHandleChecked();
+    CHECK(return_value->SameValue(*snippets[i].return_value()));
+  }
+}
+
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8