Implement argument definition test in the vm.

runtime/vm/intermediate_language_x64.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_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/intermediate_language.h"
 
 #include "lib/error.h"
@@ skipping 212 matching lines @@
                                   kConditionTypeErrorRuntimeEntry,
                                   locs());
     // We should never return here.
     __ int3();
     __ Bind(&done);
   }
   ASSERT(obj == result);
 }
 
 
+LocationSummary* ArgumentDefinitionTestComp::MakeLocationSummary() const {
+  const intptr_t kNumInputs = 1;
+  const intptr_t kNumTemps = 0;
+  LocationSummary* locs =
+      new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kCall);
+  locs->set_in(0, Location::RegisterLocation(RAX));
+  locs->set_out(Location::RegisterLocation(RAX));
+  return locs;
+}
+
+
+void ArgumentDefinitionTestComp::EmitNativeCode(FlowGraphCompiler* compiler) {
+  Register saved_args_desc = locs()->in(0).reg();
+  Register result = locs()->out().reg();
+
+  // Push the result place holder initialized to NULL.
+  __ PushObject(Object::ZoneHandle());
+  __ pushq(Immediate(Smi::RawValue(formal_parameter_index())));
+  __ PushObject(formal_parameter_name());
+  __ pushq(saved_args_desc);
+  compiler->GenerateCallRuntime(deopt_id(),
+                                token_pos(),
+                                kArgumentDefinitionTestRuntimeEntry,
+                                locs());
+  __ Drop(3);
+  __ popq(result);  // Pop bool result.
+}
+
+
 static Condition TokenKindToSmiCondition(Token::Kind kind) {
   switch (kind) {
     case Token::kEQ: return EQUAL;
     case Token::kNE: return NOT_EQUAL;
     case Token::kLT: return LESS;
     case Token::kGT: return GREATER;
     case Token::kLTE: return LESS_EQUAL;
     case Token::kGTE: return  GREATER_EQUAL;
     default:
       UNREACHABLE();
@@ skipping 1984 matching lines @@
   }
   __ j(ABOVE_EQUAL, deopt);
 }
 
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_X64