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

src/compiler/mips64/instruction-selector-mips64.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/base/adapters.h"
 #include "src/base/bits.h"
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
 
@@ skipping 1938 matching lines @@
 
 void InstructionSelector::VisitFloat64ExtractLowWord32(Node* node) {
   VisitRR(this, kMips64Float64ExtractLowWord32, node);
 }
 
 
 void InstructionSelector::VisitFloat64ExtractHighWord32(Node* node) {
   VisitRR(this, kMips64Float64ExtractHighWord32, node);
 }
 
+void InstructionSelector::VisitFloat64SilenceNaN(Node* node) {
+  VisitRR(this, kMips64Float64SilenceNaN, node);
+}
 
 void InstructionSelector::VisitFloat64InsertLowWord32(Node* node) {
   Mips64OperandGenerator g(this);
   Node* left = node->InputAt(0);
   Node* right = node->InputAt(1);
   Emit(kMips64Float64InsertLowWord32, g.DefineSameAsFirst(node),
        g.UseRegister(left), g.UseRegister(right));
 }
 
 
@@ skipping 106 matching lines @@
   } else {
     DCHECK(kArchVariant == kMips64r2);
     return MachineOperatorBuilder::AlignmentRequirements::
         NoUnalignedAccessSupport();
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8