[fullcodegen] Factor out EmitNewClosure from architectures.

src/full-codegen/full-codegen.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/full-codegen/full-codegen.h"
 
 #include "src/ast/ast.h"
 #include "src/ast/ast-numbering.h"
 #include "src/ast/prettyprinter.h"
 #include "src/ast/scopeinfo.h"
@@ skipping 989 matching lines @@
       current->Exit(&context_length);
       DCHECK_EQ(-1, context_length);
       current->AsTryFinally()->deferred_commands()->RecordReturn();
       return;
     }
     current = current->Exit(&context_length);
   }
   EmitReturnSequence();
 }
 
+void FullCodeGenerator::EmitNewClosure(Handle<SharedFunctionInfo> info,
+                                       bool pretenure) {
+  // Use the fast case closure allocation code that allocates in new
+  // space for nested functions that don't need literals cloning. If
+  // we're running with the --always-opt or the --prepare-always-opt
+  // flag, we need to use the runtime function so that the new function
+  // we are creating here gets a chance to have its code optimized and
+  // doesn't just get a copy of the existing unoptimized code.
+  if (!FLAG_always_opt &&
+      !FLAG_prepare_always_opt &&
+      !pretenure &&
+      scope()->is_function_scope() &&
+      info->num_literals() == 0) {
+    FastNewClosureStub stub(isolate(), info->language_mode(), info->kind());
+    __ Move(stub.GetCallInterfaceDescriptor().GetRegisterParameter(0), info);
+    __ CallStub(&stub);
+  } else {
+    __ Push(info);
+    __ CallRuntime(pretenure ? Runtime::kNewClosure_Tenured
+                             : Runtime::kNewClosure);
+  }
+  context()->Plug(result_register());
+}
+
 void FullCodeGenerator::EmitNamedPropertyLoad(Property* prop) {
   SetExpressionPosition(prop);
   Literal* key = prop->key()->AsLiteral();
   DCHECK(!key->value()->IsSmi());
   DCHECK(!prop->IsSuperAccess());
 
   __ Move(LoadDescriptor::NameRegister(), key->value());
   __ Move(LoadDescriptor::SlotRegister(),
           SmiFromSlot(prop->PropertyFeedbackSlot()));
   CallLoadIC(NOT_INSIDE_TYPEOF);
@@ skipping 875 matching lines @@
   return var->mode() == CONST_LEGACY || var->scope()->is_nonlinear() ||
          var->initializer_position() >= proxy->position();
 }
 
 
 #undef __
 
 
 }  // namespace internal
 }  // namespace v8