S390: [turbofan] Prevent storing signalling NaNs into holey double arrays.

src/compiler/s390/instruction-selector-s390.cc

 // Copyright 2015 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/base/adapters.h"
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
 #include "src/s390/frames-s390.h"
 
@@ skipping 1161 matching lines @@
   S390OperandGenerator g(this);
   Emit(kS390_ModDouble, g.DefineAsFixed(node, d1),
        g.UseFixed(node->InputAt(0), d1), g.UseFixed(node->InputAt(1), d2))
       ->MarkAsCall();
 }
 
 void InstructionSelector::VisitFloat32Max(Node* node) { UNREACHABLE(); }
 
 void InstructionSelector::VisitFloat64Max(Node* node) { UNREACHABLE(); }
 
+void InstructionSelector::VisitFloat64SilenceNaN(Node* node) {
+  VisitRR(this, kS390_Float64SilenceNaN, node);
+}
+
 void InstructionSelector::VisitFloat32Min(Node* node) { UNREACHABLE(); }
 
 void InstructionSelector::VisitFloat64Min(Node* node) { UNREACHABLE(); }
 
 void InstructionSelector::VisitFloat32Abs(Node* node) {
   VisitRR(this, kS390_AbsFloat, node);
 }
 
 void InstructionSelector::VisitFloat64Abs(Node* node) {
   VisitRR(this, kS390_AbsDouble, node);
@@ skipping 652 matching lines @@
 // static
 MachineOperatorBuilder::AlignmentRequirements
 InstructionSelector::AlignmentRequirements() {
   return MachineOperatorBuilder::AlignmentRequirements::
       FullUnalignedAccessSupport();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8