[Interpreter] Adds support for DeleteLookupSlot 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 8c0922933c0b84b0077766316160e02536082117..8e8d860b9846e0e7b707df466f473fd236980e04 100644
--- a/test/cctest/compiler/test-run-bytecode-graph-builder.cc
+++ b/test/cctest/compiler/test-run-bytecode-graph-builder.cc
@@ -978,6 +978,44 @@ TEST(BytecodeGraphBuilderDeleteGlobal) {
 }
 
 
+TEST(BytecodeGraphBuilderDeleteLookupSlot) {
+  HandleAndZoneScope scope;
+  Isolate* isolate = scope.main_isolate();
+  Zone* zone = scope.main_zone();
+  Factory* factory = isolate->factory();
+
+  // TODO(mythria): Add more tests when we have support for LdaLookupSlot.
+  const char* function_prologue = "var f;"
+                                  "var x = 1;"
+                                  "y = 10;"
+                                  "var obj = {val:10};"
+                                  "var z = 30;"
+                                  "function f1() {"
+                                  "  var z = 20;"
+                                  "  eval(\"function t() {";
+  const char* function_epilogue = "        }; f = t; t();\");"
+                                  "}"
+                                  "f1();";
+
+  ExpectedSnippet<0> snippets[] = {
+      {"return delete y;", {factory->true_value()}},
+      {"return delete z;", {factory->false_value()}},
+  };
+
+  size_t num_snippets = sizeof(snippets) / sizeof(snippets[0]);
+  for (size_t i = 0; i < num_snippets; i++) {
+    ScopedVector<char> script(1024);
+    SNPrintF(script, "%s %s %s", function_prologue, snippets[i].code_snippet,
+             function_epilogue);
+
+    BytecodeGraphTester tester(isolate, zone, script.start(), "t");
+    auto callable = tester.GetCallable<>();
+    Handle<Object> return_value = callable().ToHandleChecked();
+    CHECK(return_value->SameValue(*snippets[i].return_value()));
+  }
+}
+
+
 bool get_compare_result(Token::Value opcode, Handle<Object> lhs_value,
                         Handle<Object> rhs_value) {
   switch (opcode) {