[generators] Create the fixed array holding the registers only once.

src/bailout-reason.h

Index: src/bailout-reason.h
diff --git a/src/bailout-reason.h b/src/bailout-reason.h
index 91421bbd9c0efb5c2668379e02d11d55aa38720a..490d7b2a3dc3a94a2d4744b8158230cd979be533 100644
--- a/src/bailout-reason.h
+++ b/src/bailout-reason.h
@@ -110,6 +110,7 @@ namespace internal {
   V(kInvalidLhsInCompoundAssignment, "Invalid lhs in compound assignment")     \
   V(kInvalidLhsInCountOperation, "Invalid lhs in count operation")             \
   V(kInvalidMinLength, "Invalid min_length")                                   \
+  V(kInvalidRegisterFileInGenerator, "invalid register file in generator")     \
   V(kJSGlobalObjectNativeContextShouldBeANativeContext,                        \
     "JSGlobalObject::native_context should be a native context")               \
   V(kJSGlobalProxyContextShouldNotBeNull,                                      \