Less aggressive polling when concurrently compiling for OSR.

src/x64/builtins-x64.cc

Index: src/x64/builtins-x64.cc
diff --git a/src/x64/builtins-x64.cc b/src/x64/builtins-x64.cc
index a6dc0037098063244db9f6ee3c18bf9a8caa1e8c..26488efaf2486f4487dd81d7f935a20af2a86d33 100644
--- a/src/x64/builtins-x64.cc
+++ b/src/x64/builtins-x64.cc
@@ -1401,6 +1401,23 @@ void Builtins::Generate_OnStackReplacement(MacroAssembler* masm) {
 }
 
 
+void Builtins::Generate_OsrAfterStackCheck(MacroAssembler* masm) {
+  // We check the stack limit as indicator that recompilation might be done.
+  Label ok;
+  __ CompareRoot(rsp, Heap::kStackLimitRootIndex);
+  __ j(above_equal, &ok);
+  {
+    FrameScope scope(masm, StackFrame::INTERNAL);
+    __ CallRuntime(Runtime::kStackGuard, 0);
+  }
+  __ jmp(masm->isolate()->builtins()->OnStackReplacement(),
+         RelocInfo::CODE_TARGET);
+
+  __ bind(&ok);
+  __ ret(0);
+}
+
+
 #undef __
 
 } }  // namespace v8::internal