Proof-of-concept RegExp-cache for exec, test, replace.

src/codegen.cc

Index: src/codegen.cc
diff --git a/src/codegen.cc b/src/codegen.cc
index bc722bbeb88bb475593a82bf109fac0d4f6dc934..edf7fbaadcff2c5c65b577a24a13f7a56284cf49 100644
--- a/src/codegen.cc
+++ b/src/codegen.cc
@@ -381,6 +381,8 @@ CodeGenerator::InlineRuntimeLUT CodeGenerator::kInlineRuntimeLUT[] = {
   {&CodeGenerator::GenerateNumberToString, "_NumberToString"},
   {&CodeGenerator::GenerateMathSin, "_Math_sin"},
   {&CodeGenerator::GenerateMathCos, "_Math_cos"},
+  {&CodeGenerator::GenerateIsIdentical, "_IsIdentical"},
+  {&CodeGenerator::GenerateRegExpId, "_RegExpId"},
 };