Refactor optimized in hydrogen only runtime functions.

src/arm64/full-codegen-arm64.cc

Index: src/arm64/full-codegen-arm64.cc
diff --git a/src/arm64/full-codegen-arm64.cc b/src/arm64/full-codegen-arm64.cc
index 272e1c7e232085e9554e342d266406d261335166..768a8ae2dc698bed9dd5e61d23a893049e024fd1 100644
--- a/src/arm64/full-codegen-arm64.cc
+++ b/src/arm64/full-codegen-arm64.cc
@@ -3137,7 +3137,7 @@ void FullCodeGenerator::EmitLog(CallRuntime* expr) {
   if (CodeGenerator::ShouldGenerateLog(isolate(), args->at(0))) {
     VisitForStackValue(args->at(1));
     VisitForStackValue(args->at(2));
-    __ CallRuntime(Runtime::kLog, 2);
+    __ CallRuntime(Runtime::kHiddenLog, 2);
   }
 
   // Finally, we're expected to leave a value on the top of the stack.
@@ -3598,7 +3598,7 @@ void FullCodeGenerator::EmitGetFromCache(CallRuntime* expr) {
 
   // Call runtime to perform the lookup.
   __ Push(cache, key);
-  __ CallRuntime(Runtime::kGetFromCache, 2);
+  __ CallRuntime(Runtime::kHiddenGetFromCache, 2);
 
   __ Bind(&done);
   context()->Plug(x0);
@@ -3856,8 +3856,8 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
 
 
 void FullCodeGenerator::VisitCallRuntime(CallRuntime* expr) {
-  Handle<String> name = expr->name();
-  if (name->length() > 0 && name->Get(0) == '_') {
+  if (expr->function() != NULL &&
+      expr->function()->intrinsic_type == Runtime::INLINE) {
     Comment cmnt(masm_, "[ InlineRuntimeCall");
     EmitInlineRuntimeCall(expr);
     return;
@@ -3874,6 +3874,7 @@ void FullCodeGenerator::VisitCallRuntime(CallRuntime* expr) {
     __ Push(x0);
 
     // Load the function from the receiver.
+    Handle<String> name = expr->name();
     __ Mov(x2, Operand(name));
     CallLoadIC(NOT_CONTEXTUAL, expr->CallRuntimeFeedbackId());