Add tests for v8::ScriptCompiler::kEagerCompile.

R=leszeks@chromium.org

Bug: v8:7591
Change-Id: Idcd2d586ab279dc070d2cfb2558298ebdd3ce33b
Reviewed-on: https://chromium-review.googlesource.com/991873
Commit-Queue: Yang Guo <yangguo@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52321}

test/cctest/test-compiler.cc

@@ -786,5 +786,57 @@ TEST(InvocationCount) {
   CHECK_EQ(4, foo->feedback_vector()->invocation_count());
 }
 
+TEST(ShallowEagerCompilation) {
+  i::FLAG_always_opt = false;
+  CcTest::InitializeVM();
+  LocalContext env;
+  i::Isolate* isolate = CcTest::i_isolate();
+  v8::HandleScope scope(CcTest::isolate());
+  v8::Local<v8::String> source = v8_str(
+      "function f(x) {"
+      "  return x + x;"
+      "}"
+      "f(2)");
+  v8::ScriptCompiler::Source script_source(source);
+  v8::Local<v8::Script> script =
+      v8::ScriptCompiler::Compile(env.local(), &script_source,
+                                  v8::ScriptCompiler::kEagerCompile)
+          .ToLocalChecked();
+  {
+    v8::internal::DisallowCompilation no_compile_expected(isolate);
+    v8::Local<v8::Value> result = script->Run(env.local()).ToLocalChecked();
+    CHECK_EQ(4, result->Int32Value(env.local()).FromJust());
+  }
+}
+
+TEST(DeepEagerCompilation) {
+  i::FLAG_always_opt = false;
+  CcTest::InitializeVM();
+  LocalContext env;
+  i::Isolate* isolate = CcTest::i_isolate();
+  v8::HandleScope scope(CcTest::isolate());
+  v8::Local<v8::String> source = v8_str(
+      "function f(x) {"
+      "  function g(x) {"
+      "    function h(x) {"
+      "      return x ** x;"
+      "    }"
+      "    return h(x) * h(x);"
+      "  }"
+      "  return g(x) + g(x);"
+      "}"
+      "f(2)");
+  v8::ScriptCompiler::Source script_source(source);
+  v8::Local<v8::Script> script =
+      v8::ScriptCompiler::Compile(env.local(), &script_source,
+                                  v8::ScriptCompiler::kEagerCompile)
+          .ToLocalChecked();
+  {
+    v8::internal::DisallowCompilation no_compile_expected(isolate);
+    v8::Local<v8::Value> result = script->Run(env.local()).ToLocalChecked();
+    CHECK_EQ(32, result->Int32Value(env.local()).FromJust());
+  }
+}
+
 }  // namespace internal
 }  // namespace v8