Remove support for optimized dart leaf functions.

runtime/vm/flow_graph_compiler.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_XXX.
 
 #include "vm/flow_graph_compiler.h"
 
 #include "vm/dart_entry.h"
 #include "vm/debugger.h"
@@ skipping 121 matching lines @@
     builder.AddCopy(inner->LocationAt(i), *inner->ValueAt(i), slot_ix++);
   }
 
   const DeoptInfo& deopt_info = DeoptInfo::Handle(builder.CreateDeoptInfo());
   return deopt_info.raw();
 }
 
 
 FlowGraphCompiler::FlowGraphCompiler(Assembler* assembler,
                                      const FlowGraph& flow_graph,
-                                     bool is_optimizing,
-                                     bool is_leaf)
+                                     bool is_optimizing)
     : assembler_(assembler),
       parsed_function_(flow_graph.parsed_function()),
       block_order_(flow_graph.reverse_postorder()),
       current_block_(NULL),
       exception_handlers_list_(NULL),
       pc_descriptors_list_(NULL),
       stackmap_table_builder_(
           is_optimizing ? new StackmapTableBuilder() : NULL),
       block_info_(block_order_.length()),
       deopt_infos_(),
       object_table_(GrowableObjectArray::Handle(GrowableObjectArray::New())),
       is_optimizing_(is_optimizing),
-      is_dart_leaf_(is_leaf),
       bool_true_(Bool::ZoneHandle(Bool::True())),
       bool_false_(Bool::ZoneHandle(Bool::False())),
       double_class_(Class::ZoneHandle(
           Isolate::Current()->object_store()->double_class())),
       parallel_move_resolver_(this) {
   ASSERT(assembler != NULL);
 }
 
 
 FlowGraphCompiler::~FlowGraphCompiler() {
   // BlockInfos are zone-allocated, so their destructors are not called.
   // Verify the labels explicitly here.
   for (int i = 0; i < block_info_.length(); ++i) {
     ASSERT(!block_info_[i]->label.IsLinked());
     ASSERT(!block_info_[i]->label.HasNear());
   }
 }
 
 
-bool FlowGraphCompiler::IsLeaf() const {
-  return is_dart_leaf_ &&
-         !parsed_function_.function().IsClosureFunction() &&
-         (parsed_function().num_copied_params() == 0);
-}
-
-
 bool FlowGraphCompiler::HasFinally() const {
   return parsed_function().function().has_finally();
 }
 
 
 void FlowGraphCompiler::InitCompiler() {
   pc_descriptors_list_ = new DescriptorList(64);
   exception_handlers_list_ = new ExceptionHandlerList();
   block_info_.Clear();
   for (int i = 0; i < block_order_.length(); ++i) {
@@ skipping 282 matching lines @@
 
 
 const ICData& FlowGraphCompiler::GenerateInstanceCall(
     intptr_t deopt_id,
     intptr_t token_pos,
     const String& function_name,
     intptr_t argument_count,
     const Array& argument_names,
     intptr_t checked_argument_count,
     LocationSummary* locs) {
-  ASSERT(!IsLeaf());
   ICData& ic_data =
       ICData::ZoneHandle(ICData::New(parsed_function().function(),
                                      function_name,
                                      deopt_id,
                                      checked_argument_count));
   const Array& arguments_descriptor =
       DartEntry::ArgumentsDescriptor(argument_count, argument_names);
   uword label_address = 0;
   switch (checked_argument_count) {
     case 1:
@@ skipping 404 matching lines @@
     case ABOVE:         return unsigned_left > unsigned_right;
     case ABOVE_EQUAL:   return unsigned_left >= unsigned_right;
     default:
       UNIMPLEMENTED();
       return false;
   }
 }
 
 
 }  // namespace dart