[turbofan] Introduce new Select operator to improve bounds checking.

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_
 
 // Opcodes for control operators.
 #define INNER_CONTROL_OP_LIST(V) \
   V(Dead)                        \
@@ skipping 15 matching lines @@
 #define LEAF_OP_LIST(V) \
   V(Int32Constant)      \
   V(Int64Constant)      \
   V(Float32Constant)    \
   V(Float64Constant)    \
   V(ExternalConstant)   \
   V(NumberConstant)     \
   V(HeapConstant)
 
 #define INNER_OP_LIST(V) \
+  V(Select)              \
   V(Phi)                 \
   V(EffectPhi)           \
   V(ValueEffect)         \
   V(Finish)              \
   V(FrameState)          \
   V(StateValues)         \
   V(Call)                \
   V(Parameter)           \
   V(Projection)
 
@@ skipping 276 matching lines @@
         return false;
     }
   }
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_OPCODES_H_