Add ObjectPool tag for external labels. Use LoadExternalLabel for native calls...

runtime/vm/intermediate_language_arm.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_ARM.
 #if defined(TARGET_ARCH_ARM)
 
 #include "vm/intermediate_language.h"
 
 #include "vm/cpu.h"
@@ skipping 943 matching lines @@
     // stub generates the redirection address when running under the simulator
     // and hence we do not change 'entry' here.
     stub_entry = StubCode::CallNativeCFunction_entry();
 #if defined(USING_SIMULATOR)
     if (!function().IsNativeAutoSetupScope()) {
       entry = Simulator::RedirectExternalReference(
           entry, Simulator::kBootstrapNativeCall, function().NumParameters());
     }
 #endif
   }
-  __ LoadImmediate(R5, entry);
+  ExternalLabel label(entry);
+  __ LoadExternalLabel(R5, &label, kNotPatchable);
   __ LoadImmediate(R1, argc_tag);
   compiler->GenerateCall(token_pos(),
                          *stub_entry,
                          RawPcDescriptors::kOther,
                          locs());
   __ Pop(result);
 }
 
 
 LocationSummary* StringFromCharCodeInstr::MakeLocationSummary(Zone* zone,
                                                               bool opt) const {
   const intptr_t kNumInputs = 1;
   // TODO(fschneider): Allow immediate operands for the char code.
   return LocationSummary::Make(zone,
                                kNumInputs,
                                Location::RequiresRegister(),
                                LocationSummary::kNoCall);
 }
 
 
 void StringFromCharCodeInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   ASSERT(compiler->is_optimizing());
   const Register char_code = locs()->in(0).reg();
   const Register result = locs()->out(0).reg();
-  __ LoadImmediate(result,
-                   reinterpret_cast<uword>(Symbols::PredefinedAddress()));
+
+  ExternalLabel label(reinterpret_cast<uword>(Symbols::PredefinedAddress()));
+  __ LoadExternalLabel(result, &label, kNotPatchable);
   __ AddImmediate(result, Symbols::kNullCharCodeSymbolOffset * kWordSize);
   __ ldr(result, Address(result, char_code, LSL, 1));  // Char code is a smi.
 }
 
 
 LocationSummary* StringToCharCodeInstr::MakeLocationSummary(Zone* zone,
                                                             bool opt) const {
   const intptr_t kNumInputs = 1;
   return LocationSummary::Make(zone,
                                kNumInputs,
@@ skipping 5847 matching lines @@
                                 1,
                                 locs());
   __ Drop(1);
   __ Pop(result);
 }
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM