Relax assertions on equality of load fields.

runtime/vm/intermediate_language.cc

Index: runtime/vm/intermediate_language.cc
diff --git a/runtime/vm/intermediate_language.cc b/runtime/vm/intermediate_language.cc
index 5d82fef2e27cd73b6240bc57c7388ff8b30cb94c..92469b61758c86999aebc5b3737d51092af190c4 100644
--- a/runtime/vm/intermediate_language.cc
+++ b/runtime/vm/intermediate_language.cc
@@ -106,7 +106,9 @@ bool LoadFieldInstr::AttributesEqual(Instruction* other) const {
   ASSERT(other_load != NULL);
   ASSERT((offset_in_bytes() != other_load->offset_in_bytes()) ||
          ((immutable_ == other_load->immutable_) &&
-          (ResultCid() == other_load->ResultCid())));
+          ((ResultCid() == other_load->ResultCid()) ||
+           (ResultCid() == kDynamicCid) ||
+           (other_load->ResultCid() == kDynamicCid))));
   return offset_in_bytes() == other_load->offset_in_bytes();
 }