Track references to allocation stubs via static_calls_table, instead of keeping two referencers ali…

runtime/vm/intermediate_language_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/intermediate_language.h"
 
 #include "vm/dart_entry.h"
@@ skipping 1980 matching lines @@
 
   __ Bind(&slow_path);
   Isolate* isolate = compiler->isolate();
   const Code& stub = Code::Handle(
       isolate, isolate->stub_code()->GetAllocateArrayStub());
   const ExternalLabel label(stub.EntryPoint());
   compiler->GenerateCall(token_pos(),
                          &label,
                          RawPcDescriptors::kOther,
                          locs());
+  compiler->AddStubCallTarget(stub);
   __ Bind(&done);
   ASSERT(locs()->out(0).reg() == kResultReg);
 }
 
 
 LocationSummary* LoadFieldInstr::MakeLocationSummary(Isolate* isolate,
                                                      bool opt) const {
   const intptr_t kNumInputs = 1;
   const intptr_t kNumTemps =
       (IsUnboxedLoad() && opt) ? 1 :
@@ skipping 3894 matching lines @@
 void AllocateObjectInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   Isolate* isolate = compiler->isolate();
   StubCode* stub_code = isolate->stub_code();
   const Code& stub = Code::Handle(isolate,
                                   stub_code->GetAllocationStubForClass(cls()));
   const ExternalLabel label(stub.EntryPoint());
   compiler->GenerateCall(token_pos(),
                          &label,
                          RawPcDescriptors::kOther,
                          locs());
+  compiler->AddStubCallTarget(stub);
   __ Drop(ArgumentCount());  // Discard arguments.
 }
 
 
 void DebugStepCheckInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   ASSERT(!compiler->is_optimizing());
   StubCode* stub_code = compiler->isolate()->stub_code();
   const ExternalLabel label(stub_code->DebugStepCheckEntryPoint());
   compiler->GenerateCall(token_pos(), &label, stub_kind_, locs());
 #if defined(DEBUG)
   __ movq(R10, Immediate(kInvalidObjectPointer));
   __ movq(RBX, Immediate(kInvalidObjectPointer));
 #endif
 }
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_X64