VM: Fix bug that can causes infinite opt/deopt loop.

runtime/vm/intermediate_language_mips.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_MIPS.
 #if defined(TARGET_ARCH_MIPS)
 
 #include "vm/intermediate_language.h"
 
 #include "vm/compiler.h"
@@ skipping 814 matching lines @@
   return locs;
 }
 
 
 Condition TestCidsInstr::EmitComparisonCode(FlowGraphCompiler* compiler,
                                             BranchLabels labels) {
   ASSERT((kind() == Token::kIS) || (kind() == Token::kISNOT));
   Register val_reg = locs()->in(0).reg();
   Register cid_reg = locs()->temp(0).reg();
 
-  Label* deopt = CanDeoptimize() ?
-      compiler->AddDeoptStub(deopt_id(), ICData::kDeoptTestCids) : NULL;
+  Label* deopt = CanDeoptimize()
+      ? compiler->AddDeoptStub(deopt_id(),
+                               ICData::kDeoptTestCids,
+                               licm_hoisted_ ? ICData::kHoisted : 0)
+      : NULL;
 
   const intptr_t true_result = (kind() == Token::kIS) ? 1 : 0;
   const ZoneGrowableArray<intptr_t>& data = cid_results();
   ASSERT(data[0] == kSmiCid);
   bool result = data[1] == true_result;
   __ andi(CMPRES1, val_reg, Immediate(kSmiTagMask));
   __ beq(CMPRES1, ZR, result ? labels.true_label : labels.false_label);
 
   __ LoadClassId(cid_reg, val_reg);
   for (intptr_t i = 2; i < data.length(); i += 2) {
@@ skipping 4877 matching lines @@
                                 1,
                                 locs());
   __ lw(result, Address(SP, 1 * kWordSize));
   __ addiu(SP, SP, Immediate(2 * kWordSize));
 }
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS