Moving more code to lookup an item from the native cache into code generator.

test/cctest/test-api.cc

 // Copyright 2007-2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 10246 matching lines @@
   CHECK_EQ(2, prologue_call_count_second);
   CHECK_EQ(2, epilogue_call_count_second);
   v8::V8::RemoveGCPrologueCallback(PrologueCallbackSecond);
   v8::V8::RemoveGCEpilogueCallback(EpilogueCallbackSecond);
   i::Heap::CollectAllGarbage(false);
   CHECK_EQ(2, prologue_call_count);
   CHECK_EQ(2, epilogue_call_count);
   CHECK_EQ(2, prologue_call_count_second);
   CHECK_EQ(2, epilogue_call_count_second);
 }
+
+
+THREADED_TEST(AddToJSFunctionResultCache) {
+  i::FLAG_allow_natives_syntax = true;
+  v8::HandleScope scope;
+
+  LocalContext context;
+
+  const char* code =
+      "(function() {"
+      "  var key0 = 'a';"
+      "  var key1 = 'b';"
+      "  var r0 = %_GetFromCache(0, key0);"
+      "  var r1 = %_GetFromCache(0, key1);"
+      "  var r0_ = %_GetFromCache(0, key0);"
+      "  if (r0 !== r0_)"
+      "    return 'Different results for ' + key0 + ': ' + r0 + ' vs. ' + r0_;"
+      "  var r1_ = %_GetFromCache(0, key1);"
+      "  if (r1 !== r1_)"
+      "    return 'Different results for ' + key1 + ': ' + r1 + ' vs. ' + r1_;"
+      "  return 'PASSED';"
+      "})()";
+  v8::internal::Heap::ClearJSFunctionResultCaches();
+  ExpectString(code, "PASSED");
+}
+
+
+static const int k0CacheSize = 16;
+
+THREADED_TEST(FillJSFunctionResultCache) {
+  i::FLAG_allow_natives_syntax = true;
+  v8::HandleScope scope;
+
+  LocalContext context;
+
+  const char* code =
+      "(function() {"
+      "  var k = 'a';"
+      "  var r = %_GetFromCache(0, k);"
+      "  for (var i = 0; i < 16; i++) {"
+      "    %_GetFromCache(0, 'a' + i);"
+      "  };"
+      "  if (r === %_GetFromCache(0, k))"
+      "    return 'FAILED: k0CacheSize is too small';"
+      "  return 'PASSED';"
+      "})()";
+  v8::internal::Heap::ClearJSFunctionResultCaches();
+  ExpectString(code, "PASSED");
+}
+
+
+THREADED_TEST(RoundRobinGetFromCache) {
+  i::FLAG_allow_natives_syntax = true;
+  v8::HandleScope scope;
+
+  LocalContext context;
+
+  const char* code =
+      "(function() {"
+      "  var keys = [];"
+      "  for (var i = 0; i < 16; i++) keys.push(i);"
+      "  var values = [];"
+      "  for (var i = 0; i < 16; i++) values[i] = %_GetFromCache(0, keys[i]);"
+      "  for (var i = 0; i < 16; i++) {"
+      "    var v = %_GetFromCache(0, keys[i]);"
+      "    if (v !== values[i])"
+      "      return 'Wrong value for ' + "
+      "          keys[i] + ': ' + v + ' vs. ' + values[i];"
+      "  };"
+      "  return 'PASSED';"
+      "})()";
+  v8::internal::Heap::ClearJSFunctionResultCaches();
+  ExpectString(code, "PASSED");
+}
+
+
+THREADED_TEST(ReverseGetFromCache) {
+  i::FLAG_allow_natives_syntax = true;
+  v8::HandleScope scope;
+
+  LocalContext context;
+
+  const char* code =
+      "(function() {"
+      "  var keys = [];"
+      "  for (var i = 0; i < 16; i++) keys.push(i);"
+      "  var values = [];"
+      "  for (var i = 0; i < 16; i++) values[i] = %_GetFromCache(0, keys[i]);"
+      "  for (var i = 15; i >= 16; i--) {"
+      "    var v = %_GetFromCache(0, keys[i]);"
+      "    if (v !== values[i])"
+      "      return 'Wrong value for ' + "
+      "          keys[i] + ': ' + v + ' vs. ' + values[i];"
+      "  };"
+      "  return 'PASSED';"
+      "})()";
+  v8::internal::Heap::ClearJSFunctionResultCaches();
+  ExpectString(code, "PASSED");
+}
+
+
+THREADED_TEST(TestEviction) {
+  i::FLAG_allow_natives_syntax = true;
+  v8::HandleScope scope;
+
+  LocalContext context;
+
+  const char* code =
+      "(function() {"
+      "  for (var i = 0; i < 2*16; i++) {"
+      "    %_GetFromCache(0, 'a' + i);"
+      "  };"
+      "  return 'PASSED';"
+      "})()";
+  v8::internal::Heap::ClearJSFunctionResultCaches();
+  ExpectString(code, "PASSED");
+}