- Correctly handle negative constant indices when

runtime/vm/intermediate_language_x64.cc

Index: runtime/vm/intermediate_language_x64.cc
===================================================================
--- runtime/vm/intermediate_language_x64.cc	(revision 22702)
+++ runtime/vm/intermediate_language_x64.cc	(working copy)
@@ -3942,6 +3942,13 @@
   Location index_loc = locs()->in(kIndexPos);
 
   if (length_loc.IsConstant() && index_loc.IsConstant()) {
+    // TODO(srdjan): remove this code once failures are fixed.
+    if ((Smi::Cast(length_loc.constant()).Value() >
+         Smi::Cast(index_loc.constant()).Value()) &&
+        (Smi::Cast(index_loc.constant()).Value() >= 0)) {
+      // This CheckArrayBoundInstr should have been eliminated.
+      return;
+    }
     ASSERT((Smi::Cast(length_loc.constant()).Value() <=
             Smi::Cast(index_loc.constant()).Value()) ||
            (Smi::Cast(index_loc.constant()).Value() < 0));