[interpreter, debugger] implement debugger statement.

test/cctest/interpreter/test-bytecode-generator.cc

Index: test/cctest/interpreter/test-bytecode-generator.cc
diff --git a/test/cctest/interpreter/test-bytecode-generator.cc b/test/cctest/interpreter/test-bytecode-generator.cc
index 3513cb5716be83adb6e563bb30e90c555866bbb5..bd36b5f2a698c106b65a11d27751963412930ec6 100644
--- a/test/cctest/interpreter/test-bytecode-generator.cc
+++ b/test/cctest/interpreter/test-bytecode-generator.cc
@@ -7650,6 +7650,26 @@ TEST(WithStatement) {
   }
 }
 
+TEST(DoDebugger) {
+  InitializedHandleScope handle_scope;
+  BytecodeGeneratorHelper helper;
+
+  ExpectedSnippet<const char*> snippet = {"debugger;",
+                                          0,
+                                          1,
+                                          3,
+                                          {
+                                              B(Debugger),      //

[rmcilroy, 2016/02/04 12:37:17]

https://codereview.chromium.org/1665853002/ will add a B(StackCheck) at the
start of the function.

Also, could you add "// clang-format off" before and  "// clang-format on" after
the snippet, and format the snippet like the others.

[Yang, 2016/02/04 13:47:06]

Done.

+                                              B(LdaUndefined),  //
+                                              B(Return)         //
+                                          },
+                                          0};
+
+  Handle<BytecodeArray> bytecode_array =
+      helper.MakeBytecodeForFunctionBody(snippet.code_snippet);
+  CheckBytecodeArrayEqual(snippet, bytecode_array);
+}
+
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8