[crankshaft] TODO bankruptcy.

src/crankshaft/hydrogen-store-elimination.cc

 // Copyright 2013 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/crankshaft/hydrogen-store-elimination.h"
 
 #include "src/crankshaft/hydrogen-instructions.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 18 matching lines @@
   flags.Add(kTypedArrayElements);
 
   for (int i = 0; i < graph()->blocks()->length(); i++) {
     unobserved_.Rewind(0);
     HBasicBlock* block = graph()->blocks()->at(i);
     if (!block->IsReachable()) continue;
     for (HInstructionIterator it(block); !it.Done(); it.Advance()) {
       HInstruction* instr = it.Current();
       if (instr->CheckFlag(HValue::kIsDead)) continue;
 
-      // TODO(titzer): eliminate unobserved HStoreKeyed instructions too.
       switch (instr->opcode()) {
         case HValue::kStoreNamedField:
           // Remove any unobserved stores overwritten by this store.
           ProcessStore(HStoreNamedField::cast(instr));
           break;
         case HValue::kLoadNamedField:
           // Observe any unobserved stores on this object + field.
           ProcessLoad(HLoadNamedField::cast(instr));
           break;
         default:
@@ skipping 11 matching lines @@
   while (i < unobserved_.length()) {
     HStoreNamedField* prev = unobserved_.at(i);
     if (aliasing_->MustAlias(object, prev->object()->ActualValue()) &&
         prev->CanBeReplacedWith(store)) {
       // This store is guaranteed to overwrite the previous store.
       prev->DeleteAndReplaceWith(NULL);
       TRACE(("++ Unobserved store S%d overwritten by S%d\n",
              prev->id(), store->id()));
       unobserved_.Remove(i);
     } else {
-      // TODO(titzer): remove map word clearing from folded allocations.
       i++;
     }
   }
   // Only non-transitioning stores are removable.
   if (!store->has_transition()) {
     TRACE(("-- Might remove store S%d\n", store->id()));
     unobserved_.Add(store, zone());
   }
 }
 
@@ skipping 32 matching lines @@
   if (instr->DependsOnFlags().ContainsAnyOf(flags)) {
     TRACE(("-- Observed stores at I%d (GVN flags of %s)\n",
            instr->id(), instr->Mnemonic()));
     unobserved_.Rewind(0);
     return;
   }
 }
 
 }  // namespace internal
 }  // namespace v8