[turbofan] Introduce dedicated NumberToBoolean 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>
 
 // Opcodes for control operators.
@@ skipping 250 matching lines @@
   V(NumberLog2)                        \
   V(NumberLog10)                       \
   V(NumberRound)                       \
   V(NumberSign)                        \
   V(NumberSin)                         \
   V(NumberSinh)                        \
   V(NumberSqrt)                        \
   V(NumberTan)                         \
   V(NumberTanh)                        \
   V(NumberTrunc)                       \
+  V(NumberToBoolean)                   \
   V(NumberToInt32)                     \
   V(NumberToUint32)                    \
   V(NumberSilenceNaN)
 
 #define SIMPLIFIED_OTHER_OP_LIST(V) \
   V(PlainPrimitiveToNumber)         \
   V(PlainPrimitiveToWord32)         \
   V(PlainPrimitiveToFloat64)        \
   V(BooleanNot)                     \
   V(StringCharCodeAt)               \
@@ skipping 472 matching lines @@
   }
 };
 
 std::ostream& operator<<(std::ostream&, IrOpcode::Value);
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_OPCODES_H_