Refactor branch instructions to enable further optimizations.

runtime/vm/il_printer.cc

Index: runtime/vm/il_printer.cc
===================================================================
--- runtime/vm/il_printer.cc	(revision 11450)
+++ runtime/vm/il_printer.cc	(working copy)
@@ -554,33 +554,16 @@
 
 
 void BranchInstr::PrintTo(BufferFormatter* f) const {
-  f->Print("    %s:%d ", DebugName(), deopt_id());
+  f->Print("    %s ", DebugName());
   f->Print("if ");
-  left()->PrintTo(f);
-  f-> Print(" %s ", Token::Str(kind()));
-  right()->PrintTo(f);
+  computation()->PrintTo(f);
 
   f->Print(" goto (%d, %d)",
             true_successor()->block_id(),
             false_successor()->block_id());
-  if (HasICData()) {
-    PrintICData(f, *ic_data());
-  }
 }
 
 
-void StrictCompareAndBranchInstr::PrintTo(BufferFormatter* f) const {
-  f->Print("    %s", DebugName());
-  f->Print("if ");
-  left()->PrintTo(f);
-  f-> Print(" %s ", Token::Str(kind()));
-  right()->PrintTo(f);
-  f->Print(" goto (%d, %d)",
-            true_successor()->block_id(),
-            false_successor()->block_id());
-}
-
-
 void ParallelMoveInstr::PrintTo(BufferFormatter* f) const {
   f->Print("    %s ", DebugName());
   for (intptr_t i = 0; i < moves_.length(); i++) {
@@ -828,27 +811,13 @@
 void BranchInstr::PrintToVisualizer(BufferFormatter* f) const {
   f->Print("_ %s ", DebugName());
   f->Print("if ");
-  left()->PrintTo(f);
-  f-> Print(" %s ", Token::Str(kind()));
-  right()->PrintTo(f);
+  computation()->PrintTo(f);
   f->Print(" goto (B%d, B%d)",
             true_successor()->block_id(),
             false_successor()->block_id());
 }
 
 
-void StrictCompareAndBranchInstr::PrintToVisualizer(BufferFormatter* f) const {
-  f->Print("_ %s ", DebugName());
-  f->Print("if ");
-  left()->PrintTo(f);
-  f-> Print(" %s ", Token::Str(kind()));
-  right()->PrintTo(f);
-  f->Print(" goto (B%d, B%d)",
-            true_successor()->block_id(),
-            false_successor()->block_id());
-}
-
-
 void ParallelMoveInstr::PrintToVisualizer(BufferFormatter* f) const {
   UNIMPLEMENTED();
 }