Add explicit class checks: LoadVMField.

runtime/vm/flow_graph_compiler_ia32.cc

 // Copyright (c) 2012, 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/flow_graph_compiler.h"
 
 #include "lib/error.h"
@@ skipping 1028 matching lines @@
   __ call(&StubCode::CallStaticFunctionLabel());
   AddCurrentDescriptor(PcDescriptors::kFuncCall, deopt_id, token_pos);
   RecordSafepoint(locs);
   if (is_optimizing()) {
     AddDeoptIndexAtCall(deopt_id, token_pos);
   }
   __ Drop(argument_count);
 }
 
 
-// Checks class id of instance against all 'class_ids'. Jump to 'deopt' label
-// if no match or instance is Smi.
-void FlowGraphCompiler::EmitClassChecksNoSmi(const ICData& ic_data,
-                                             Register instance_reg,
-                                             Register temp_reg,
-                                             Label* deopt) {
-  Label ok;
-  ASSERT(ic_data.GetReceiverClassIdAt(0) != kSmiCid);
-  __ testl(instance_reg, Immediate(kSmiTagMask));
-  __ j(ZERO, deopt);
-  Label is_ok;
-  const intptr_t num_checks = ic_data.NumberOfChecks();
-  const bool use_near_jump = num_checks < 5;
-  __ LoadClassId(temp_reg, instance_reg);
-  for (intptr_t i = 0; i < num_checks; i++) {
-    __ cmpl(temp_reg, Immediate(ic_data.GetReceiverClassIdAt(i)));
-    if (i == (num_checks - 1)) {
-      __ j(NOT_EQUAL, deopt);
-    } else {
-      if (use_near_jump) {
-        __ j(EQUAL, &is_ok, Assembler::kNearJump);
-      } else {
-        __ j(EQUAL, &is_ok);
-      }
-    }
-  }
-  __ Bind(&is_ok);
-}
-
-
 void FlowGraphCompiler::LoadDoubleOrSmiToXmm(XmmRegister result,
                                              Register reg,
                                              Register temp,
                                              Label* not_double_or_smi) {
   Label is_smi, done;
   __ testl(reg, Immediate(kSmiTagMask));
   __ j(ZERO, &is_smi);
   __ CompareClassId(reg, kDoubleCid, temp);
   __ j(NOT_EQUAL, not_double_or_smi);
   __ movsd(result, FieldAddress(reg, Double::value_offset()));
@@ skipping 209 matching lines @@
   __ popl(ECX);
   __ popl(EAX);
 }
 
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32