Add Float64Round operator.

src/compiler/pipeline.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/pipeline.h"
 
 #include <sstream>
 
 #include "src/base/platform/elapsed-timer.h"
 #include "src/compiler/ast-graph-builder.h"
@@ skipping 229 matching lines @@
   ZonePool zone_pool(isolate());
 
   // Build the graph.
   Graph graph(zone());
   SourcePositionTable source_positions(&graph);
   source_positions.AddDecorator();
   // TODO(turbofan): there is no need to type anything during initial graph
   // construction.  This is currently only needed for the node cache, which the
   // typer could sweep over later.
   Typer typer(&graph, info()->context());
-  MachineOperatorBuilder machine;
+  MachineOperatorBuilder machine(kMachPtr,
+                                 InstructionSelector::GetSupportedOperators());
   CommonOperatorBuilder common(zone());
   JSOperatorBuilder javascript(zone());
   JSGraph jsgraph(&graph, &common, &javascript, &machine);
   Node* context_node;
   {
     PhaseStats graph_builder_stats(info(), &zone_pool, PhaseStats::CREATE_GRAPH,
                                    "graph builder");
     ZonePool::Scope zone_scope(&zone_pool);
     AstGraphBuilderWithPositions graph_builder(zone_scope.zone(), info(),
                                                &jsgraph, &source_positions);
@@ skipping 275 matching lines @@
 }
 
 
 void Pipeline::TearDown() {
   InstructionOperand::TearDownCaches();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8