Replaced Value by Definition in the renaming environment.

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 1421 matching lines @@
   // Instead of popping the value it is left alone on the simulated frame
   // and materialized on the physical stack before the call.
   // TODO(fschneider): Avoid special-casing for SSA mode here.
   if (compiler->is_ssa()) {
     ASSERT(locs()->in(0).IsRegister());
     __ PushRegister(locs()->in(0).reg());
   }
 }
 
 
+// Helper to either use the constant value of a defintion or the defintion.
+static Value* UseDefinition(Definition* defn) {
+  if (defn->IsBind() && defn->AsBind()->computation()->IsConstant()) {
+    return defn->AsBind()->computation()->AsConstant();
+  } else {
+    return new UseVal(defn);
+  }
+}
+
+
+Environment::Environment(const GrowableArray<Definition*>& definitions,
+                         intptr_t fixed_parameter_count)
+    : values_(definitions.length()),
+      locations_(NULL),
+      fixed_parameter_count_(fixed_parameter_count) {
+  for (intptr_t i = 0; i < definitions.length(); ++i) {
+    values_.Add(UseDefinition(definitions[i]));
+  }
+}
+
+
 #undef __
 
 }  // namespace dart