Implement experimental exponentiation operator

src/compiler/js-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/js-operator.h"
 
 #include <limits>
 
 #include "src/base/lazy-instance.h"
 #include "src/compiler/opcodes.h"
@@ skipping 210 matching lines @@
   V(BitwiseXor, Operator::kNoProperties, 2, 1)            \
   V(BitwiseAnd, Operator::kNoProperties, 2, 1)            \
   V(ShiftLeft, Operator::kNoProperties, 2, 1)             \
   V(ShiftRight, Operator::kNoProperties, 2, 1)            \
   V(ShiftRightLogical, Operator::kNoProperties, 2, 1)     \
   V(Add, Operator::kNoProperties, 2, 1)                   \
   V(Subtract, Operator::kNoProperties, 2, 1)              \
   V(Multiply, Operator::kNoProperties, 2, 1)              \
   V(Divide, Operator::kNoProperties, 2, 1)                \
   V(Modulus, Operator::kNoProperties, 2, 1)               \
+  V(Exponentiate, Operator::kNoProperties, 2, 1)          \
   V(UnaryNot, Operator::kPure, 1, 1)                      \
   V(ToBoolean, Operator::kPure, 1, 1)                     \
   V(ToNumber, Operator::kNoProperties, 1, 1)              \
   V(ToString, Operator::kNoProperties, 1, 1)              \
   V(ToName, Operator::kNoProperties, 1, 1)                \
   V(ToObject, Operator::kNoProperties, 1, 1)              \
   V(Yield, Operator::kNoProperties, 1, 1)                 \
   V(Create, Operator::kEliminatable, 0, 1)                \
   V(HasProperty, Operator::kNoProperties, 2, 1)           \
   V(TypeOf, Operator::kPure, 1, 1)                        \
@@ skipping 163 matching lines @@
   return new (zone()) Operator1<Unique<String>>(                 // --
       IrOpcode::kJSCreateCatchContext, Operator::kNoProperties,  // opcode
       "JSCreateCatchContext",                                    // name
       2, 1, 1, 1, 1, 2,                                          // counts
       name);                                                     // parameter
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8