Pass a second type argument vector to all type instantiation calls in the VM.

runtime/vm/locations.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 RUNTIME_VM_LOCATIONS_H_
 #define RUNTIME_VM_LOCATIONS_H_
 
 #include "vm/allocation.h"
 #include "vm/assembler.h"
 #include "vm/bitfield.h"
@@ skipping 534 matching lines @@
   SmallSet<Register> untagged_cpu_registers_;
   SmallSet<FpuRegister> fpu_registers_;
 
   DISALLOW_COPY_AND_ASSIGN(RegisterSet);
 };
 
 
 // Specification of locations for inputs and output.
 class LocationSummary : public ZoneAllocated {
  public:
-  enum ContainsCall { kNoCall, kCall, kCallOnSlowPath };
+  enum ContainsCall {
+    kNoCall,  // Used registers must be reserved as tmp.
+    kCall,    // Registers have been saved and can be used without reservation.
+    kCallOnSlowPath  // Used registers must be reserved as tmp.
+  };
 
   LocationSummary(Zone* zone,
                   intptr_t input_count,
                   intptr_t temp_count,
                   LocationSummary::ContainsCall contains_call);
 
   intptr_t input_count() const { return num_inputs_; }
 
   Location in(intptr_t index) const {
     ASSERT(index >= 0);
@@ skipping 102 matching lines @@
 
 #if defined(DEBUG)
   intptr_t writable_inputs_;
 #endif
 };
 
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_LOCATIONS_H_