a tiny bug in DehoistArrayIndex

src/hydrogen.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 5345 matching lines @@
     }
   } else if (index->IsSub()) {
     sign = -1;
     HSub* sub = HSub::cast(index);
     if (sub->left()->IsConstant()) {
       subexpression = sub->right();
       constant = HConstant::cast(sub->left());
     } else if (sub->right()->IsConstant()) {
       subexpression = sub->left();
       constant = HConstant::cast(sub->right());
-    } return;
+    } else {
+      return;
+    }
   } else {
     return;
   }
 
   if (!constant->HasInteger32Value()) return;
   int32_t value = constant->Integer32Value() * sign;
   // We limit offset values to 30 bits because we want to avoid the risk of
   // overflows when the offset is added to the object header size.
   if (value >= 1 << 30 || value < 0) return;
   array_operation->SetKey(subexpression);
@@ skipping 7092 matching lines @@
     }
   }
 
 #ifdef DEBUG
   if (graph_ != NULL) graph_->Verify(false);  // No full verify.
   if (allocator_ != NULL) allocator_->Verify();
 #endif
 }
 
 } }  // namespace v8::internal