Stop creating dummy call frames when calling out to C functions

runtime/vm/intermediate_language.h

 // 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.
 
 #ifndef VM_INTERMEDIATE_LANGUAGE_H_
 #define VM_INTERMEDIATE_LANGUAGE_H_
 
 #include "vm/allocation.h"
 #include "vm/ast.h"
 #include "vm/growable_array.h"
@@ skipping 6713 matching lines @@
   virtual EffectSet Effects() const { return EffectSet::None(); }
   virtual EffectSet Dependencies() const { return EffectSet::None(); }
   virtual bool AttributesEqual(Instruction* other) const {
     InvokeMathCFunctionInstr* other_invoke = other->AsInvokeMathCFunction();
     return other_invoke->recognized_kind() == recognized_kind();
   }
 
   virtual bool MayThrow() const { return false; }
 
  private:
+  static const intptr_t kSavedSpTempIndex = 0;
+  static const intptr_t kObjectTempIndex = 1;
+  static const intptr_t kDoubleTempIndex = 2;
   virtual void RawSetInputAt(intptr_t i, Value* value) {
     (*inputs_)[i] = value;
   }
 
   ZoneGrowableArray<Value*>* inputs_;
 
   const MethodRecognizer::Kind recognized_kind_;
 
   DISALLOW_COPY_AND_ASSIGN(InvokeMathCFunctionInstr);
 };
@@ skipping 436 matching lines @@
   ForwardInstructionIterator* current_iterator_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FlowGraphVisitor);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_INTERMEDIATE_LANGUAGE_H_