[ic] Let LoadGlobalIC load the variable name from TypeFeedbackMetadata.

src/objects-printer.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/objects.h"
 
 #include "src/disasm.h"
 #include "src/disassembler.h"
 #include "src/interpreter/bytecodes.h"
 #include "src/objects-inl.h"
@@ skipping 560 matching lines @@
   os << "\n - capacity: " << length();
   for (int i = 0; i < length(); i++) {
     os << "\n  [" << i << "]: " << Brief(get(i));
     if (i == kNextLinkIndex) os << " (next link)";
     if (i == kPrototypeTransitionsIndex) os << " (prototype transitions)";
     if (i == kTransitionLengthIndex) os << " (number of transitions)";
   }
   os << "\n";
 }
 
+template void FeedbackVectorSpecBase<StaticFeedbackVectorSpec>::Print();
+template void FeedbackVectorSpecBase<FeedbackVectorSpec>::Print();
+
+template <typename Derived>
+void FeedbackVectorSpecBase<Derived>::Print() {
+  OFStream os(stdout);
+  FeedbackVectorSpecPrint(os);
+  os << std::flush;
+}
+
+template <typename Derived>
+void FeedbackVectorSpecBase<Derived>::FeedbackVectorSpecPrint(
+    std::ostream& os) {  // NOLINT
+  int slot_count = This()->slots();
+  os << " - slot_count: " << slot_count;
+  if (slot_count == 0) {
+    os << " (empty)\n";
+    return;
+  }
+
+  for (int slot = 0, name_index = 0; slot < slot_count;) {
+    FeedbackVectorSlotKind kind = This()->GetKind(slot);
+    int entry_size = TypeFeedbackMetadata::GetSlotSize(kind);
+    DCHECK_LT(0, entry_size);
+
+    os << "\n Slot #" << slot << " " << kind;
+    if (TypeFeedbackMetadata::SlotRequiresName(kind)) {
+      os << ", " << Brief(*This()->GetName(name_index++));
+    }
+
+    slot += entry_size;
+  }
+  os << "\n";
+}
 
 void TypeFeedbackMetadata::Print() {
   OFStream os(stdout);
   TypeFeedbackMetadataPrint(os);
   os << std::flush;
 }
 
 
 void TypeFeedbackMetadata::TypeFeedbackMetadataPrint(
     std::ostream& os) {  // NOLINT
   HeapObject::PrintHeader(os, "TypeFeedbackMetadata");
   os << "\n - length: " << length();
   if (length() == 0) {
     os << " (empty)\n";
     return;
   }
+  os << "\n - slot_count: " << slot_count();
 
   TypeFeedbackMetadataIterator iter(this);
   while (iter.HasNext()) {
     FeedbackVectorSlot slot = iter.Next();
     FeedbackVectorSlotKind kind = iter.kind();
     os << "\n Slot " << slot << " " << kind;
+    if (TypeFeedbackMetadata::SlotRequiresName(kind)) {
+      os << ", " << Brief(iter.name());
+    }
   }
   os << "\n";
 }
 
 
 void TypeFeedbackVector::Print() {
   OFStream os(stdout);
   TypeFeedbackVectorPrint(os);
   os << std::flush;
 }
 
 
 void TypeFeedbackVector::TypeFeedbackVectorPrint(std::ostream& os) {  // NOLINT
   HeapObject::PrintHeader(os, "TypeFeedbackVector");
   os << "\n - length: " << length();
   if (length() == 0) {
     os << " (empty)\n";
     return;
   }
 
   TypeFeedbackMetadataIterator iter(metadata());
   while (iter.HasNext()) {
     FeedbackVectorSlot slot = iter.Next();
     FeedbackVectorSlotKind kind = iter.kind();
 
-    os << "\n Slot " << slot << " " << kind << " ";
+    os << "\n Slot " << slot << " " << kind;
+    if (TypeFeedbackMetadata::SlotRequiresName(kind)) {
+      os << ", " << Brief(iter.name());
+    }
+    os << " ";
     switch (kind) {
       case FeedbackVectorSlotKind::LOAD_IC: {
         LoadICNexus nexus(this, slot);
         os << Code::ICState2String(nexus.StateFromFeedback());
         break;
       }
       case FeedbackVectorSlotKind::LOAD_GLOBAL_IC: {
         LoadGlobalICNexus nexus(this, slot);
         os << Code::ICState2String(nexus.StateFromFeedback());
         break;
@@ skipping 705 matching lines @@
 void JSObject::PrintTransitions(std::ostream& os) {  // NOLINT
   Object* transitions = map()->raw_transitions();
   int num_transitions = TransitionArray::NumberOfTransitions(transitions);
   if (num_transitions == 0) return;
   os << "\n - transitions";
   TransitionArray::PrintTransitions(os, transitions, false);
 }
 #endif  // defined(DEBUG) || defined(OBJECT_PRINT)
 }  // namespace internal
 }  // namespace v8