Make IL instructions a doubly-linked list within basic blocks.

vm/il_printer.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/il_printer.h"
 
 #include "vm/intermediate_language.h"
 #include "vm/os.h"
 
 namespace dart {
@@ skipping 19 matching lines @@
 
 
 void FlowGraphPrinter::PrintBlocks() {
   if (!function_.IsNull()) {
     OS::Print("==== %s\n", function_.ToFullyQualifiedCString());
   }
 
   for (intptr_t i = 0; i < block_order_.length(); ++i) {
     // Print the block entry.
     PrintInstruction(block_order_[i]);
-    Instruction* current = block_order_[i]->StraightLineSuccessor();
+    Instruction* current = block_order_[i]->successor();
     // And all the successors until an exit, branch, or a block entry.
     while ((current != NULL) && !current->IsBlockEntry()) {
       OS::Print("\n");
       PrintInstruction(current);
-      current = current->StraightLineSuccessor();
+      current = current->successor();
     }
     BlockEntryInstr* successor =
         (current == NULL) ? NULL : current->AsBlockEntry();
     if (successor != NULL) {
       OS::Print(" goto %d", successor->block_id());
     }
     OS::Print("\n");
   }
 }
 
@@ skipping 461 matching lines @@
         }
         END("states");
       }
 
       {
         BEGIN("HIR");
         // Print the block entry.
         Print("0 0 ");  // Required fields "bci" and "use". Unused.
         Instruction* current = block_order_[i];
         PrintInstruction(current);
-        current = current->StraightLineSuccessor();
+        current = current->successor();
         // And all the successors until an exit, branch, or a block entry.
         while ((current != NULL) && !current->IsBlockEntry()) {
           Print("0 0 ");
           PrintInstruction(current);
-          current = current->StraightLineSuccessor();
+          current = current->successor();
         }
         BlockEntryInstr* successor =
             (current == NULL) ? NULL : current->AsBlockEntry();
         if (successor != NULL) {
           Print("0 0 _ Goto B%d <|@\n", successor->block_id());
         }
         END("HIR");
       }
       END("block");
     }
@@ skipping 101 matching lines @@
 }
 
 
 void ParallelMoveInstr::PrintToVisualizer(BufferFormatter* f) const {
   UNIMPLEMENTED();
 }
 
 
 
 }  // namespace dart