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

src/compiler/machine-operator.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/machine-operator.h"
 
 #include "src/base/lazy-instance.h"
 #include "src/compiler/opcodes.h"
 #include "src/compiler/operator.h"
 
@@ skipping 112 matching lines @@
   V(ChangeFloat64ToInt32, Operator::kNoProperties, 1, 0, 1)                   \
   V(ChangeFloat64ToUint32, Operator::kNoProperties, 1, 0, 1)                  \
   V(TruncateFloat64ToUint32, Operator::kNoProperties, 1, 0, 1)                \
   V(TruncateFloat32ToInt32, Operator::kNoProperties, 1, 0, 1)                 \
   V(TruncateFloat32ToUint32, Operator::kNoProperties, 1, 0, 1)                \
   V(TryTruncateFloat32ToInt64, Operator::kNoProperties, 1, 0, 2)              \
   V(TryTruncateFloat64ToInt64, Operator::kNoProperties, 1, 0, 2)              \
   V(TryTruncateFloat32ToUint64, Operator::kNoProperties, 1, 0, 2)             \
   V(TryTruncateFloat64ToUint64, Operator::kNoProperties, 1, 0, 2)             \
   V(ChangeInt32ToFloat64, Operator::kNoProperties, 1, 0, 1)                   \
+  V(Float64SilenceNaN, Operator::kNoProperties, 1, 0, 1)                      \
   V(RoundFloat64ToInt32, Operator::kNoProperties, 1, 0, 1)                    \
   V(RoundInt32ToFloat32, Operator::kNoProperties, 1, 0, 1)                    \
   V(RoundInt64ToFloat32, Operator::kNoProperties, 1, 0, 1)                    \
   V(RoundInt64ToFloat64, Operator::kNoProperties, 1, 0, 1)                    \
   V(RoundUint32ToFloat32, Operator::kNoProperties, 1, 0, 1)                   \
   V(RoundUint64ToFloat32, Operator::kNoProperties, 1, 0, 1)                   \
   V(RoundUint64ToFloat64, Operator::kNoProperties, 1, 0, 1)                   \
   V(ChangeInt32ToInt64, Operator::kNoProperties, 1, 0, 1)                     \
   V(ChangeUint32ToFloat64, Operator::kNoProperties, 1, 0, 1)                  \
   V(ChangeUint32ToUint64, Operator::kNoProperties, 1, 0, 1)                   \
@@ skipping 551 matching lines @@
   }
   ATOMIC_REPRESENTATION_LIST(STORE)
 #undef STORE
   UNREACHABLE();
   return nullptr;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8