Add fast 64-bit integer ADD and SUB to the optimizing compiler.

runtime/vm/flow_graph_compiler.cc

 // Copyright (c) 2012, 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/globals.h"  // Needed here to get TARGET_ARCH_XXX.
 
 #include "vm/flow_graph_compiler.h"
 
 #include "vm/dart_entry.h"
 #include "vm/debugger.h"
@@ skipping 186 matching lines @@
 
 bool FlowGraphCompiler::CanOptimize() {
   return !FLAG_report_usage_count &&
          (FLAG_optimization_counter_threshold >= 0) &&
          !Isolate::Current()->debugger()->IsActive();
 }
 
 
 void FlowGraphCompiler::VisitBlocks() {
   for (intptr_t i = 0; i < block_order().length(); ++i) {
-    assembler()->Comment("B%"Pd"", i);
     // Compile the block entry.
     BlockEntryInstr* entry = block_order()[i];
+    assembler()->Comment("B%"Pd"", entry->block_id());
     set_current_block(entry);
     entry->PrepareEntry(this);
     // Compile all successors until an exit, branch, or a block entry.
     for (ForwardInstructionIterator it(entry); !it.Done(); it.Advance()) {
       Instruction* instr = it.Current();
       if (FLAG_code_comments) EmitComment(instr);
       if (instr->IsParallelMove()) {
         parallel_move_resolver_.EmitNativeCode(instr->AsParallelMove());
       } else {
         ASSERT(instr->locs() != NULL);
@@ skipping 679 matching lines @@
     case ABOVE:         return unsigned_left > unsigned_right;
     case ABOVE_EQUAL:   return unsigned_left >= unsigned_right;
     default:
       UNIMPLEMENTED();
       return false;
   }
 }
 
 
 }  // namespace dart