[turbofan] Introduce Float64Pow and NumberPow operators.

src/compiler/js-builtin-reducer.h

Index: src/compiler/js-builtin-reducer.h
diff --git a/src/compiler/js-builtin-reducer.h b/src/compiler/js-builtin-reducer.h
index c91579236f7c038699fb4031b6fa0400860c6864..5ddc86ef9950177771da5be1fbb94b1f86061c4c 100644
--- a/src/compiler/js-builtin-reducer.h
+++ b/src/compiler/js-builtin-reducer.h
@@ -33,10 +33,12 @@ class JSBuiltinReducer final : public AdvancedReducer {
   Reduction ReduceMathAtan(Node* node);
   Reduction ReduceMathAtan2(Node* node);
   Reduction ReduceMathAtanh(Node* node);
+  Reduction ReduceMathCbrt(Node* node);
   Reduction ReduceMathCeil(Node* node);
   Reduction ReduceMathClz32(Node* node);
   Reduction ReduceMathCos(Node* node);
   Reduction ReduceMathExp(Node* node);
+  Reduction ReduceMathExpm1(Node* node);
   Reduction ReduceMathFloor(Node* node);
   Reduction ReduceMathFround(Node* node);
   Reduction ReduceMathImul(Node* node);
@@ -46,8 +48,7 @@ class JSBuiltinReducer final : public AdvancedReducer {
   Reduction ReduceMathLog2(Node* node);
   Reduction ReduceMathMax(Node* node);
   Reduction ReduceMathMin(Node* node);
-  Reduction ReduceMathCbrt(Node* node);
-  Reduction ReduceMathExpm1(Node* node);
+  Reduction ReduceMathPow(Node* node);
   Reduction ReduceMathRound(Node* node);
   Reduction ReduceMathSin(Node* node);
   Reduction ReduceMathSqrt(Node* node);