Create a new RegExp object for every evaluation of a RegExp literal.

src/codegen.h

Index: src/codegen.h
diff --git a/src/codegen.h b/src/codegen.h
index 7a4b85814dd17c03dab8b839f662555f21a6c5be..2a6ad6435b55ef372d319b0583bb241040fffed1 100644
--- a/src/codegen.h
+++ b/src/codegen.h
@@ -80,25 +80,6 @@ enum UnaryOverwriteMode { UNARY_OVERWRITE, UNARY_NO_OVERWRITE };
 // Types of uncatchable exceptions.
 enum UncatchableExceptionType { OUT_OF_MEMORY, TERMINATION };
 
-
-#if V8_TARGET_ARCH_IA32
-#include "ia32/codegen-ia32.h"
-#elif V8_TARGET_ARCH_X64
-#include "x64/codegen-x64.h"
-#elif V8_TARGET_ARCH_ARM
-#include "arm/codegen-arm.h"
-#elif V8_TARGET_ARCH_MIPS
-#include "mips/codegen-mips.h"
-#else
-#error Unsupported target architecture.
-#endif
-
-#include "register-allocator.h"
-
-namespace v8 {
-namespace internal {
-
-
 #define INLINE_RUNTIME_FUNCTION_LIST(F) \
   F(IsSmi, 1, 1)                                                             \
   F(IsNonNegativeSmi, 1, 1)                                                  \
@@ -132,8 +113,26 @@ namespace internal {
   F(MathPow, 2, 1)                                                           \
   F(MathSin, 1, 1)                                                           \
   F(MathCos, 1, 1)                                                           \
-  F(MathSqrt, 1, 1)
+  F(MathSqrt, 1, 1)                                                          \
+  F(IsRegExpEquivalent, 2, 1)
+
+
+#if V8_TARGET_ARCH_IA32
+#include "ia32/codegen-ia32.h"
+#elif V8_TARGET_ARCH_X64
+#include "x64/codegen-x64.h"
+#elif V8_TARGET_ARCH_ARM
+#include "arm/codegen-arm.h"
+#elif V8_TARGET_ARCH_MIPS
+#include "mips/codegen-mips.h"
+#else
+#error Unsupported target architecture.
+#endif
 
+#include "register-allocator.h"
+
+namespace v8 {
+namespace internal {
 
 // Support for "structured" code comments.
 #ifdef DEBUG