Make prettyprinting of variable proxies clearer.

src/ast/prettyprinter.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/ast/prettyprinter.h"
 
 #include <stdarg.h>
 
 #include "src/ast/ast-value-factory.h"
 #include "src/ast/scopes.h"
@@ skipping 453 matching lines @@
 //-----------------------------------------------------------------------------
 
 
 #ifdef DEBUG
 
 // A helper for ast nodes that use FeedbackVectorSlots.
 static int FormatSlotNode(Vector<char>* buf, Expression* node,
                           const char* node_name, FeedbackVectorSlot slot) {
   int pos = SNPrintF(*buf, "%s", node_name);
   if (!slot.IsInvalid()) {
-    pos = SNPrintF(*buf + pos, " Slot(%d)", slot.ToInt());
+    pos += SNPrintF(*buf + pos, " Slot(%d)", slot.ToInt());
   }
   return pos;
 }
 
 
 PrettyPrinter::PrettyPrinter(Isolate* isolate) {
   output_ = NULL;
   size_ = 0;
   pos_ = 0;
   InitializeAstVisitor(isolate);
@@ skipping 1071 matching lines @@
   int pos =
       FormatSlotNode(&buf, node, "VAR PROXY", node->VariableFeedbackSlot());
 
   if (!node->is_resolved()) {
     SNPrintF(buf + pos, " unresolved");
     PrintLiteralWithModeIndented(buf.start(), nullptr, node->name());
   } else {
     Variable* var = node->var();
     switch (var->location()) {
       case VariableLocation::UNALLOCATED:
+        SNPrintF(buf + pos, " unallocated");
         break;
       case VariableLocation::PARAMETER:
         SNPrintF(buf + pos, " parameter[%d]", var->index());
         break;
       case VariableLocation::LOCAL:
         SNPrintF(buf + pos, " local[%d]", var->index());
         break;
       case VariableLocation::CONTEXT:
         SNPrintF(buf + pos, " context[%d]", var->index());
         break;
@@ skipping 127 matching lines @@
 
 void AstPrinter::VisitRewritableExpression(RewritableExpression* node) {
   Visit(node->expression());
 }
 
 
 #endif  // DEBUG
 
 }  // namespace internal
 }  // namespace v8