New array bounds check elimination pass (focused on induction variables and bitwise operations).

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 396e98a7f931cd824e516d3faef20a94c1ec97e0..dccd6aab0b401e1b806daebb0a60b8800dab6d09 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -4251,6 +4251,8 @@ class BoundsCheckBbData: public ZoneObject {
     }
 
     if (!keep_new_check) {
+      BasicBlock()->graph()->isolate()->counters()->
+          bounds_checks_covered()->Increment();
       new_check->DeleteAndReplaceWith(new_check->ActualValue());
     }
 
@@ -4448,6 +4450,9 @@ void HGraph::EliminateRedundantBoundsChecks() {
   HPhase phase("H_Eliminate bounds checks", this);
   BoundsCheckTable checks_table(zone());
   EliminateRedundantBoundsChecks(entry_block(), &checks_table);
+  if (FLAG_abcd_ivars) {
+    EliminateRedundantBoundsChecksUsingInductionVariables();
+  }
 }