Remove the redundant load on every context lookup.

src/prettyprinter.cc

Index: src/prettyprinter.cc
diff --git a/src/prettyprinter.cc b/src/prettyprinter.cc
index 211f3f63602fa8ed46d590e46815a9ab2d4fb998..dda7abbb3f6de1641abaf27a76f0c5c13e969960 100644
--- a/src/prettyprinter.cc
+++ b/src/prettyprinter.cc
@@ -297,13 +297,13 @@ void PrettyPrinter::VisitSlot(Slot* node) {
       Print("parameter[%d]", node->index());
       break;
     case Slot::LOCAL:
-      Print("frame[%d]", node->index());
+      Print("local[%d]", node->index());
       break;
     case Slot::CONTEXT:
-      Print(".context[%d]", node->index());
+      Print("context[%d]", node->index());
       break;
     case Slot::LOOKUP:
-      Print(".context[");
+      Print("lookup[");
       PrintLiteral(node->var()->name(), false);
       Print("]");
       break;
@@ -999,24 +999,7 @@ void AstPrinter::VisitCatchExtensionObject(CatchExtensionObject* node) {
 
 void AstPrinter::VisitSlot(Slot* node) {
   PrintIndented("SLOT ");
-  switch (node->type()) {
-    case Slot::PARAMETER:
-      Print("parameter[%d]", node->index());
-      break;
-    case Slot::LOCAL:
-      Print("frame[%d]", node->index());
-      break;
-    case Slot::CONTEXT:
-      Print(".context[%d]", node->index());
-      break;
-    case Slot::LOOKUP:
-      Print(".context[");
-      PrintLiteral(node->var()->name(), false);
-      Print("]");
-      break;
-    default:
-      UNREACHABLE();
-  }
+  PrettyPrinter::VisitSlot(node);
   Print("\n");
 }