VM: Add double unary minus intrinsic.

runtime/vm/intrinsifier.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.
 // Class for intrinsifying functions.
 
 #include "vm/assembler.h"
 #include "vm/compiler.h"
 #include "vm/flags.h"
 #include "vm/flow_graph.h"
 #include "vm/flow_graph_compiler.h"
@@ skipping 850 matching lines @@
       new StoreInstanceFieldInstr(GrowableObjectArray::length_offset(),
                                   new Value(growable_array),
                                   new Value(length),
                                   kNoStoreBarrier,
                                   builder.TokenPos()));
   Definition* null_def = builder.AddNullDefinition();
   builder.AddIntrinsicReturn(new Value(null_def));
   return true;
 }
 
+
+bool Intrinsifier::Build_DoubleFlipSignBit(FlowGraph* flow_graph) {
+  GraphEntryInstr* graph_entry = flow_graph->graph_entry();
+  TargetEntryInstr* normal_entry = graph_entry->normal_entry();
+  BlockBuilder builder(flow_graph, normal_entry);
+
+  Definition* receiver = builder.AddParameter(1);
+  Definition* unboxed_value =
+      builder.AddUnboxInstr(kUnboxedDouble, new Value(receiver));
+  Definition* unboxed_result = builder.AddDefinition(
+      new UnaryDoubleOpInstr(Token::kNEGATE,
+                             new Value(unboxed_value),
+                             Thread::kNoDeoptId));
+  Definition* result = builder.AddDefinition(
+      BoxInstr::Create(kUnboxedDouble, new Value(unboxed_result)));
+  builder.AddIntrinsicReturn(new Value(result));
+  return true;
+}
+
 }  // namespace dart