[regexp] Port RegExp.prototype.exec to TurboFan

src/code-stub-assembler.h

Index: src/code-stub-assembler.h
diff --git a/src/code-stub-assembler.h b/src/code-stub-assembler.h
index 936c5d267799b52aee590fc4cbe85ae5e9143a57..5f42d2920eab6b905604a5f8e8469559405b82cf 100644
--- a/src/code-stub-assembler.h
+++ b/src/code-stub-assembler.h
@@ -467,6 +467,13 @@ class CodeStubAssembler : public compiler::CodeAssembler {
                               PrimitiveType primitive_type,
                               char const* method_name);
 
+  // Throws a TypeError for {method_name} if {value} is not of the given
+  // instance type. Returns {value}'s map.
+  compiler::Node* ThrowIfNotInstanceType(compiler::Node* context,
+                                         compiler::Node* value,
+                                         InstanceType instance_type,
+                                         char const* method_name);
+
   // String helpers.
   // Load a character from a String (might flatten a ConsString).
   compiler::Node* StringCharCodeAt(compiler::Node* string,