Improve inobject field tracking during GVN.

src/hydrogen-check-elimination.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 85 matching lines @@
       case HValue::kCheckMapValue: {
         ReduceCheckMapValue(HCheckMapValue::cast(instr));
         break;
       }
       case HValue::kCheckHeapObject: {
         ReduceCheckHeapObject(HCheckHeapObject::cast(instr));
         break;
       }
       default: {
         // If the instruction changes maps uncontrollably, drop everything.
-        if (instr->CheckGVNFlag(kChangesMaps) ||
-            instr->CheckGVNFlag(kChangesOsrEntries)) {
+        if (instr->CheckChangesFlag(kMaps) ||
+            instr->CheckChangesFlag(kOsrEntries)) {
           Kill();
         }
       }
       // Improvements possible:
       // - eliminate redundant HCheckSmi, HCheckInstanceType instructions
       // - track which values have been HCheckHeapObject'd
     }
 
     return this;
   }
@@ skipping 207 matching lines @@
       // This store transitions the object to a new map.
       Kill(object);
       Insert(object, MapConstant(instr->transition()));
     } else if (IsMapAccess(instr->access())) {
       // This is a store directly to the map field of the object.
       Kill(object);
       if (!instr->value()->IsConstant()) return;
       Insert(object, MapConstant(instr->value()));
     } else {
       // If the instruction changes maps, it should be handled above.
-      CHECK(!instr->CheckGVNFlag(kChangesMaps));
+      CHECK(!instr->CheckChangesFlag(kMaps));
     }
   }
 
   void ReduceCompareMap(HCompareMap* instr) {
     MapSet maps = FindMaps(instr->value()->ActualValue());
     if (maps == NULL) return;
     if (maps->Contains(instr->map())) {
       if (maps->size() == 1) {
         TRACE(("Marking redundant CompareMap #%d at B%d as true\n",
             instr->id(), instr->block()->block_id()));
@@ skipping 161 matching lines @@
     switch (instr->opcode()) {
       case HValue::kStoreNamedField: {
         stores_.Add(HStoreNamedField::cast(instr), zone);
         break;
       }
       case HValue::kOsrEntry: {
         // Kill everything. Loads must not be hoisted past the OSR entry.
         maps_stored_ = true;
       }
       default: {
-        maps_stored_ |= (instr->CheckGVNFlag(kChangesMaps) |
-                         instr->CheckGVNFlag(kChangesElementsKind));
+        maps_stored_ |= (instr->CheckChangesFlag(kMaps) |
+                         instr->CheckChangesFlag(kElementsKind));
       }
     }
   }
 
   // Apply these effects to the given check elimination table.
   void Apply(HCheckTable* table) {
     if (maps_stored_) {
       // Uncontrollable map modifications; kill everything.
       table->Kill();
       return;
@@ skipping 55 matching lines @@
   PRINT_STAT(removed_cho);
   PRINT_STAT(narrowed);
   PRINT_STAT(loads);
   PRINT_STAT(empty);
   PRINT_STAT(compares_true);
   PRINT_STAT(compares_false);
   PRINT_STAT(transitions);
 }
 
 } }  // namespace v8::internal