Handle bug 5442338: PCDescriptors generated wrongly, disallowing optimizations, causing assert fa...

runtime/vm/opt_code_generator_ia32.cc

 // Copyright (c) 2011, 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_IA32.
 #if defined(TARGET_ARCH_IA32)
 
 #include "vm/opt_code_generator.h"
 
 #include "vm/assembler_macros.h"
@@ skipping 1512 matching lines @@
   }
   DeoptimizationBlob* deopt_blob = AddDeoptimizationBlob(node, EAX, EDX);
   Label compare;
   // Comparison with NULL is "===".
   const Immediate raw_null =
       Immediate(reinterpret_cast<intptr_t>(Object::null()));
   __ cmpl(EAX, raw_null);
   if (num_classes == 0) {
     __ j(NOT_EQUAL, deopt_blob->label());
   } else {
-    __ j(EQUAL, &compare, Assembler::kNearJump);
+    __ j(EQUAL, &compare);
     // Smi causes deoptimization.
     __ testl(EAX, Immediate(kSmiTagMask));
     __ j(ZERO, deopt_blob->label());
     __ movl(EBX, FieldAddress(EAX, Object::class_offset()));
     for (intptr_t i = 0; i < num_classes; i++) {
       const Class& cls = *(*classes)[i];
       __ CompareObject(EBX, cls);
       if (i == (num_classes - 1)) {
         __ j(NOT_EQUAL, deopt_blob->label());
       } else {
@@ skipping 603 matching lines @@
   __ addl(ESP, Immediate(node->arguments()->length() * kWordSize));
   // Result is in EAX.
   if (IsResultNeeded(node)) {
     __ pushl(EAX);
   }
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32