[turbofan] Introduce Float64Pow and NumberPow operators.

src/compiler/js-builtin-reducer.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-builtin-reducer.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
 #include "src/compiler/simplified-operator.h"
 #include "src/objects-inl.h"
@@ skipping 321 matching lines @@
       value = graph()->NewNode(
           common()->Select(MachineRepresentation::kNone),
           graph()->NewNode(simplified()->NumberLessThan(), input, value), input,
           value);
     }
     return Replace(value);
   }
   return NoChange();
 }
 
+// ES6 section 20.2.2.26 Math.pow ( x, y )
+Reduction JSBuiltinReducer::ReduceMathPow(Node* node) {
+  JSCallReduction r(node);
+  if (r.InputsMatchTwo(Type::PlainPrimitive(), Type::PlainPrimitive())) {
+    // Math.pow(a:plain-primitive,
+    //          b:plain-primitive) -> NumberPow(ToNumber(a), ToNumber(b))
+    Node* left = ToNumber(r.left());
+    Node* right = ToNumber(r.right());
+    Node* value = graph()->NewNode(simplified()->NumberPow(), left, right);
+    return Replace(value);
+  }
+  return NoChange();
+}
+
 // ES6 section 20.2.2.28 Math.round ( x )
 Reduction JSBuiltinReducer::ReduceMathRound(Node* node) {
   JSCallReduction r(node);
   if (r.InputsMatchOne(Type::PlainPrimitive())) {
     // Math.round(a:plain-primitive) -> NumberRound(ToNumber(a))
     Node* input = ToNumber(r.GetJSCallInput(0));
     Node* value = graph()->NewNode(simplified()->NumberRound(), input);
     return Replace(value);
   }
   return NoChange();
@@ skipping 82 matching lines @@
       break;
     case kMathAtan:
       reduction = ReduceMathAtan(node);
       break;
     case kMathAtan2:
       reduction = ReduceMathAtan2(node);
       break;
     case kMathAtanh:
       reduction = ReduceMathAtanh(node);
       break;
+    case kMathCbrt:
+      reduction = ReduceMathCbrt(node);
+      break;
+    case kMathCeil:
+      reduction = ReduceMathCeil(node);
+      break;
     case kMathClz32:
       reduction = ReduceMathClz32(node);
       break;
-    case kMathCeil:
-      reduction = ReduceMathCeil(node);
-      break;
     case kMathCos:
       reduction = ReduceMathCos(node);
       break;
     case kMathExp:
       reduction = ReduceMathExp(node);
       break;
     case kMathExpm1:
       reduction = ReduceMathExpm1(node);
       break;
     case kMathFloor:
@@ skipping 16 matching lines @@
       break;
     case kMathLog2:
       reduction = ReduceMathLog2(node);
       break;
     case kMathMax:
       reduction = ReduceMathMax(node);
       break;
     case kMathMin:
       reduction = ReduceMathMin(node);
       break;
-    case kMathCbrt:
-      reduction = ReduceMathCbrt(node);
+    case kMathPow:
+      reduction = ReduceMathPow(node);
       break;
     case kMathRound:
       reduction = ReduceMathRound(node);
       break;
     case kMathSin:
       reduction = ReduceMathSin(node);
       break;
     case kMathSqrt:
       reduction = ReduceMathSqrt(node);
       break;
@@ skipping 41 matching lines @@
 }
 
 
 SimplifiedOperatorBuilder* JSBuiltinReducer::simplified() const {
   return jsgraph()->simplified();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8