Revert "- Use a hash table to canonicalize instances/arrays to avoid having to iterate over a linea…

runtime/vm/intermediate_language.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/intermediate_language.h"
 
 #include "vm/bit_vector.h"
 #include "vm/bootstrap.h"
 #include "vm/compiler.h"
 #include "vm/constant_propagator.h"
@@ skipping 1633 matching lines @@
     case kUnboxedUint32:  // Only truncating Uint32 arithmetic is supported.
     default:
       UNREACHABLE();
   }
 
   return false;
 }
 
 
 RawInteger* UnaryIntegerOpInstr::Evaluate(const Integer& value) const {
-  Thread* thread = Thread::Current();
-  Zone* zone = thread->zone();
-  Integer& result = Integer::Handle(zone);
+  Integer& result = Integer::Handle();
 
   switch (op_kind()) {
     case Token::kNEGATE:
       result = value.ArithmeticOp(Token::kMUL,
-                                  Smi::Handle(zone, Smi::New(-1)),
+                                  Smi::Handle(Smi::New(-1)),
                                   Heap::kOld);
       break;
 
     case Token::kBIT_NOT:
       if (value.IsSmi()) {
         result = Integer::New(~Smi::Cast(value).Value());
       } else if (value.IsMint()) {
         result = Integer::New(~Mint::Cast(value).value());
       }
       break;
 
     default:
       UNREACHABLE();
   }
 
   if (!result.IsNull()) {
     if (!IsRepresentable(result, representation())) {
       // If this operation is not truncating it would deoptimize on overflow.
       // Check that we match this behavior and don't produce a value that is
       // larger than something this operation can produce. We could have
       // specialized instructions that use this value under this assumption.
       return Integer::null();
     }
-    result ^= result.CheckAndCanonicalize(thread, NULL);
+    result ^= result.CheckAndCanonicalize(NULL);
   }
 
   return result.raw();
 }
 
 
 RawInteger* BinaryIntegerOpInstr::Evaluate(const Integer& left,
                                            const Integer& right) const {
-  Thread* thread = Thread::Current();
-  Zone* zone = thread->zone();
-  Integer& result = Integer::Handle(zone);
+  Integer& result = Integer::Handle();
 
   switch (op_kind()) {
     case Token::kTRUNCDIV:
     case Token::kMOD:
       // Check right value for zero.
       if (right.IsSmi() && right.AsInt64Value() == 0) {
         break;  // Will throw.
       }
       // Fall through.
     case Token::kADD:
@@ skipping 28 matching lines @@
       truncated &= RepresentationMask(representation());
       result = Integer::New(truncated);
       ASSERT(IsRepresentable(result, representation()));
     } else if (!IsRepresentable(result, representation())) {
       // If this operation is not truncating it would deoptimize on overflow.
       // Check that we match this behavior and don't produce a value that is
       // larger than something this operation can produce. We could have
       // specialized instructions that use this value under this assumption.
       return Integer::null();
     }
-    result ^= result.CheckAndCanonicalize(thread, NULL);
+    result ^= result.CheckAndCanonicalize(NULL);
   }
 
   return result.raw();
 }
 
 
 Definition* BinaryIntegerOpInstr::CreateConstantResult(FlowGraph* flow_graph,
                                                        const Integer& result) {
   Definition* result_defn = flow_graph->GetConstant(result);
   if (representation() != kTagged) {
@@ skipping 2001 matching lines @@
   set_native_c_function(native_function);
   function().SetIsNativeAutoSetupScope(auto_setup_scope);
   Dart_NativeEntryResolver resolver = library.native_entry_resolver();
   bool is_bootstrap_native = Bootstrap::IsBootstapResolver(resolver);
   set_is_bootstrap_native(is_bootstrap_native);
 }
 
 #undef __
 
 }  // namespace dart