Revert "Fix misoptimization of 'is' test"

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 b4cf34a0e78086842510d1b584d645034cc164fc..358f299bfb3c6bf820474cd6e7404bdea85089d2 100644
--- a/runtime/vm/intermediate_language.cc
+++ b/runtime/vm/intermediate_language.cc
@@ -2736,30 +2736,6 @@ Instruction* CheckClassIdInstr::Canonicalize(FlowGraph* flow_graph) {
 }
 
 
-TestCidsInstr::TestCidsInstr(TokenPosition token_pos,
-                             Token::Kind kind,
-                             Value* value,
-                             const ZoneGrowableArray<intptr_t>& cid_results,
-                             intptr_t deopt_id)
-    : TemplateComparison(token_pos, kind, deopt_id),
-      cid_results_(cid_results),
-      licm_hoisted_(false) {
-  ASSERT((kind == Token::kIS) || (kind == Token::kISNOT));
-  SetInputAt(0, value);
-  set_operation_cid(kObjectCid);
-#ifdef DEBUG
-  ASSERT(cid_results[0] == kSmiCid);
-  if (deopt_id == Thread::kNoDeoptId) {
-    // The entry for Smi can be special, but all other entries have
-    // to match in the no-deopt case.
-    for (intptr_t i = 4; i < cid_results.length(); i += 2) {
-      ASSERT(cid_results[i + 1] == cid_results[3]);
-    }
-  }
-#endif
-}
-
-
 Definition* TestCidsInstr::Canonicalize(FlowGraph* flow_graph) {
   CompileType* in_type = left()->Type();
   intptr_t cid = in_type->ToCid();