Lithium: avoid registers for constants when possible.

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index aa89f7146f276c9c377b8420650b291a5b3e2b01..65a9c959887a2eb926c918a95cc2fcd805047359 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -3265,6 +3265,12 @@ class HConstant: public HTemplateInstruction<0> {
          std::isnan(double_value_));
   }
 
+  bool InNewSpace() {
+    if (handle().is_null()) return false;
+    ALLOW_HANDLE_DEREF(isolate(), "using raw address");
+    return isolate()->heap()->InNewSpace(*handle());
+  }
+
   bool ImmortalImmovable() const {
     if (has_int32_value_) {
       return false;