[turbofan] Introduce a SpeculativeToNumber operator.

src/compiler/opcodes.h

 // Copyright 2013 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.
 
 #ifndef V8_COMPILER_OPCODES_H_
 #define V8_COMPILER_OPCODES_H_
 
 #include <iosfwd>
 
 #include "src/globals.h"
@@ skipping 283 matching lines @@
   V(NumberSqrt)                        \
   V(NumberTan)                         \
   V(NumberTanh)                        \
   V(NumberTrunc)                       \
   V(NumberToBoolean)                   \
   V(NumberToInt32)                     \
   V(NumberToUint32)                    \
   V(NumberToUint8Clamped)              \
   V(NumberSilenceNaN)
 
+#define SIMPLIFIED_SPECULATIVE_NUMBER_UNOP_LIST(V) V(SpeculativeToNumber)
+
 #define SIMPLIFIED_OTHER_OP_LIST(V) \
   V(PlainPrimitiveToNumber)         \
   V(PlainPrimitiveToWord32)         \
   V(PlainPrimitiveToFloat64)        \
   V(BooleanNot)                     \
   V(StringCharAt)                   \
   V(StringCharCodeAt)               \
   V(StringFromCharCode)             \
   V(StringFromCodePoint)            \
   V(StringIndexOf)                  \
@@ skipping 35 matching lines @@
   V(MaybeGrowFastElements)          \
   V(TransitionElementsKind)
 
 #define SIMPLIFIED_OP_LIST(V)                 \
   SIMPLIFIED_CHANGE_OP_LIST(V)                \
   SIMPLIFIED_CHECKED_OP_LIST(V)               \
   SIMPLIFIED_COMPARE_BINOP_LIST(V)            \
   SIMPLIFIED_NUMBER_BINOP_LIST(V)             \
   SIMPLIFIED_SPECULATIVE_NUMBER_BINOP_LIST(V) \
   SIMPLIFIED_NUMBER_UNOP_LIST(V)              \
+  SIMPLIFIED_SPECULATIVE_NUMBER_UNOP_LIST(V)  \
   SIMPLIFIED_OTHER_OP_LIST(V)
 
 // Opcodes for Machine-level operators.
 #define MACHINE_COMPARE_BINOP_LIST(V) \
   V(Word32Equal)                      \
   V(Word64Equal)                      \
   V(Int32LessThan)                    \
   V(Int32LessThanOrEqual)             \
   V(Uint32LessThan)                   \
   V(Uint32LessThanOrEqual)            \
@@ skipping 426 matching lines @@
   }
 };
 
 V8_EXPORT_PRIVATE std::ostream& operator<<(std::ostream&, IrOpcode::Value);
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_OPCODES_H_