[turbofan] Introduce Float64Pow and NumberPow operators.

src/compiler/instruction-selector.cc

Index: src/compiler/instruction-selector.cc
diff --git a/src/compiler/instruction-selector.cc b/src/compiler/instruction-selector.cc
index 558aff3b6cdb093930293a33d2287e4d047157f5..f645d3660859e4c155d66edfc9350457134ae5ab 100644
--- a/src/compiler/instruction-selector.cc
+++ b/src/compiler/instruction-selector.cc
@@ -1156,6 +1156,8 @@ void InstructionSelector::VisitNode(Node* node) {
       return MarkAsFloat64(node), VisitFloat64Log10(node);
     case IrOpcode::kFloat64Log2:
       return MarkAsFloat64(node), VisitFloat64Log2(node);
+    case IrOpcode::kFloat64Pow:
+      return MarkAsFloat64(node), VisitFloat64Pow(node);
     case IrOpcode::kFloat64Sin:
       return MarkAsFloat64(node), VisitFloat64Sin(node);
     case IrOpcode::kFloat64Sqrt:
@@ -1309,6 +1311,10 @@ void InstructionSelector::VisitFloat64Log10(Node* node) {
   VisitFloat64Ieee754Unop(node, kIeee754Float64Log10);
 }
 
+void InstructionSelector::VisitFloat64Pow(Node* node) {
+  VisitFloat64Ieee754Binop(node, kIeee754Float64Pow);
+}
+
 void InstructionSelector::VisitFloat64Sin(Node* node) {
   VisitFloat64Ieee754Unop(node, kIeee754Float64Sin);
 }