Use an efficient graph constant in CodeStubGraphBuilderBase::BuildGraph().

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index eca1aeaf9c3772037e85539d1120efd539846ec6..8399f0b425ba6be845cf3227b0188cc008d8f691 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -1034,6 +1034,9 @@ void HIsNilAndBranch::PrintDataTo(StringStream* stream) {
 
 void HReturn::PrintDataTo(StringStream* stream) {
   value()->PrintNameTo(stream);
+  stream->Add(" (pop ");
+  parameter_count()->PrintNameTo(stream);
+  stream->Add(" values)");
 }