Intrinsics in the INLINE_FUNCTION_LIST are now avaliable without '_', too.

src/runtime/runtime-strings.cc

Index: src/runtime/runtime-strings.cc
diff --git a/src/runtime/runtime-strings.cc b/src/runtime/runtime-strings.cc
index 9bfd69aca08e6bfc0368d7c830b0d6aac37c937d..89b0d2bfa8fe08e430a19f65397f0d15a46604f7 100644
--- a/src/runtime/runtime-strings.cc
+++ b/src/runtime/runtime-strings.cc
@@ -279,7 +279,7 @@ RUNTIME_FUNCTION(Runtime_StringLocaleCompare) {
 }
 
 
-RUNTIME_FUNCTION(Runtime_SubString) {
+RUNTIME_FUNCTION(Runtime_SubStringRT) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 3);
 
@@ -307,7 +307,13 @@ RUNTIME_FUNCTION(Runtime_SubString) {
 }
 
 
-RUNTIME_FUNCTION(Runtime_StringAdd) {
+RUNTIME_FUNCTION(Runtime_SubString) {
+  SealHandleScope shs(isolate);
+  return __RT_impl_Runtime_SubStringRT(args, isolate);
+}
+
+
+RUNTIME_FUNCTION(Runtime_StringAddRT) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 2);
   CONVERT_ARG_HANDLE_CHECKED(String, str1, 0);
@@ -320,6 +326,12 @@ RUNTIME_FUNCTION(Runtime_StringAdd) {
 }
 
 
+RUNTIME_FUNCTION(Runtime_StringAdd) {
+  SealHandleScope shs(isolate);
+  return __RT_impl_Runtime_StringAddRT(args, isolate);
+}
+
+
 RUNTIME_FUNCTION(Runtime_InternalizeString) {
   HandleScope handles(isolate);
   RUNTIME_ASSERT(args.length() == 1);
@@ -414,7 +426,7 @@ RUNTIME_FUNCTION(Runtime_CharFromCode) {
 }
 
 
-RUNTIME_FUNCTION(Runtime_StringCompare) {
+RUNTIME_FUNCTION(Runtime_StringCompareRT) {
   HandleScope handle_scope(isolate);
   DCHECK(args.length() == 2);
 
@@ -483,6 +495,12 @@ RUNTIME_FUNCTION(Runtime_StringCompare) {
 }
 
 
+RUNTIME_FUNCTION(Runtime_StringCompare) {
+  SealHandleScope shs(isolate);
+  return __RT_impl_Runtime_StringCompareRT(args, isolate);
+}
+
+
 RUNTIME_FUNCTION(Runtime_StringBuilderConcat) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 3);