[turbofan] Introduces the BitcastWordToTaggedSigned and BitcastTaggedToWord opcodes.

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 104 matching lines @@
   V(Int64Sub, Operator::kNoProperties, 2, 0, 1)                              \
   V(Int64Mul, Operator::kAssociative | Operator::kCommutative, 2, 0, 1)      \
   V(Int64Div, Operator::kNoProperties, 2, 1, 1)                              \
   V(Int64Mod, Operator::kNoProperties, 2, 1, 1)                              \
   V(Int64LessThan, Operator::kNoProperties, 2, 0, 1)                         \
   V(Int64LessThanOrEqual, Operator::kNoProperties, 2, 0, 1)                  \
   V(Uint64Div, Operator::kNoProperties, 2, 1, 1)                             \
   V(Uint64Mod, Operator::kNoProperties, 2, 1, 1)                             \
   V(Uint64LessThan, Operator::kNoProperties, 2, 0, 1)                        \
   V(Uint64LessThanOrEqual, Operator::kNoProperties, 2, 0, 1)                 \
+  V(BitcastTaggedToWord, Operator::kNoProperties, 1, 0, 1)                   \
   V(BitcastWordToTagged, Operator::kNoProperties, 1, 0, 1)                   \
+  V(BitcastWordToTaggedSigned, Operator::kNoProperties, 1, 0, 1)             \
   V(TruncateFloat64ToWord32, Operator::kNoProperties, 1, 0, 1)               \
   V(ChangeFloat32ToFloat64, Operator::kNoProperties, 1, 0, 1)                \
   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)            \
@@ skipping 677 matching lines @@
   }
   ATOMIC_REPRESENTATION_LIST(STORE)
 #undef STORE
   UNREACHABLE();
   return nullptr;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8