Fix unsigned comparisons.

src/hydrogen-uint32-analysis.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/hydrogen-uint32-analysis.h"
 
 namespace v8 {
 namespace internal {
 
 
@@ skipping 44 matching lines @@
       // operation.
       if (store->value() == val) {
         // Clamping or a conversion to double should have beed inserted.
         ASSERT(store->elements_kind() != EXTERNAL_UINT8_CLAMPED_ELEMENTS);
         ASSERT(store->elements_kind() != EXTERNAL_FLOAT32_ELEMENTS);
         ASSERT(store->elements_kind() != EXTERNAL_FLOAT64_ELEMENTS);
         return true;
       }
     }
   } else if (use->IsCompareNumericAndBranch()) {
-    return false;  // TODO(svenpanne/3380): Fix and re-enable!
     HCompareNumericAndBranch* c = HCompareNumericAndBranch::cast(use);
     return IsUint32Operation(c->left()) && IsUint32Operation(c->right());
   }
 
   return false;
 }
 
 
 // Iterate over all uses and verify that they are uint32 safe: either don't
 // distinguish between int32 and uint32 due to their bitwise nature or
@@ skipping 156 matching lines @@
 
   // Some phis might have been optimistically marked with kUint32 flag.
   // Remove this flag from those phis that are unsafe and propagate
   // this information transitively potentially clearing kUint32 flag
   // from some non-phi operations that are used as operands to unsafe phis.
   UnmarkUnsafePhis();
 }
 
 
 } }  // namespace v8::internal