Inlining of calls with optional parameters.

runtime/vm/intermediate_language.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/intermediate_language.h"
 
 #include "vm/bit_vector.h"
 #include "vm/dart_entry.h"
 #include "vm/flow_graph_allocator.h"
 #include "vm/flow_graph_builder.h"
@@ skipping 159 matching lines @@
 GraphEntryInstr::GraphEntryInstr(TargetEntryInstr* normal_entry)
     : BlockEntryInstr(0, CatchClauseNode::kInvalidTryIndex),
       normal_entry_(normal_entry),
       catch_entries_(),
       initial_definitions_(),
       spill_slot_count_(0) {
 }
 
 
 ConstantInstr* GraphEntryInstr::constant_null() {
-  ASSERT(initial_definitions_.length() > 0 &&
-         initial_definitions_[0]->IsConstant() &&
-         initial_definitions_[0]->AsConstant()->value().IsNull());
-  return initial_definitions_[0]->AsConstant();
+  ASSERT(initial_definitions_.length() > 0);
+  for (intptr_t i = 0; i < initial_definitions_.length(); ++i) {
+    ConstantInstr* defn = initial_definitions_[i]->AsConstant();
+    if (defn != NULL && defn->value().IsNull()) return defn;
+  }
+  UNREACHABLE();
+  return NULL;
 }
 
 
 static bool CompareNames(const Library& lib,
                          const char* test_name,
                          const String& name) {
   // If both names are private mangle test_name before comparison.
   if ((name.CharAt(0) == '_') && (test_name[0] == '_')) {
     const String& test_name_symbol = String::Handle(Symbols::New(test_name));
     return String::Handle(lib.PrivateName(test_name_symbol)).Equals(name);
@@ skipping 2021 matching lines @@
     new_max = new_max.Clamp();
   }
 
   return Range::Update(&range_, new_min, new_max);
 }
 
 
 #undef __
 
 }  // namespace dart