Remember all deopt reasons in ic_data, not just the last one.

runtime/vm/flow_graph_compiler_x64.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_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "vm/ast_printer.h"
@@ skipping 132 matching lines @@
 
   const DeoptInfo& deopt_info =
       DeoptInfo::Handle(builder->CreateDeoptInfo(deopt_table));
   return deopt_info.raw();
 }
 
 
 void CompilerDeoptInfoWithStub::GenerateCode(FlowGraphCompiler* compiler,
                                              intptr_t stub_ix) {
   // Calls do not need stubs, they share a deoptimization trampoline.
-  ASSERT(reason() != kDeoptAtCall);
+  ASSERT(reason() != ICData::kDeoptAtCall);
   Assembler* assem = compiler->assembler();
 #define __ assem->
   __ Comment("Deopt stub for id %" Pd "", deopt_id());
   __ Bind(entry_label());
   if (FLAG_trap_on_deoptimization) __ int3();
 
   ASSERT(deopt_env() != NULL);
 
   __ Call(&StubCode::DeoptimizeLabel(), PP);
   set_pc_offset(assem->CodeSize());
@@ skipping 1063 matching lines @@
     num_args_checked = 2;
   }
   const ICData& ic_data = ICData::ZoneHandle(
       ICData::New(parsed_function().function(),  // Caller function.
                   String::Handle(target_function.name()),
                   arguments_descriptor,
                   deopt_id,
                   num_args_checked));  // No arguments checked.
   ic_data.AddTarget(target_function);
   uword label_address = 0;
-  if (ic_data.num_args_tested() == 0) {
+  if (ic_data.NumArgsTested() == 0) {
     label_address = StubCode::ZeroArgsUnoptimizedStaticCallEntryPoint();
-  } else if (ic_data.num_args_tested() == 2) {
+  } else if (ic_data.NumArgsTested() == 2) {
     label_address = StubCode::TwoArgsUnoptimizedStaticCallEntryPoint();
   } else {
     UNIMPLEMENTED();
   }
   ExternalLabel target_label("StaticCallICStub", label_address);
   __ LoadObject(RBX, ic_data, PP);
   GenerateDartCall(deopt_id,
                    token_pos,
                    &target_label,
                    PcDescriptors::kUnoptStaticCall,
@@ skipping 572 matching lines @@
   __ movups(reg, Address(RSP, 0));
   __ AddImmediate(RSP, Immediate(kFpuRegisterSize), PP);
 }
 
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64