[turbofan] Push JSToNumber conversions into Phis.

src/compiler/js-typed-lowering.h

Index: src/compiler/js-typed-lowering.h
diff --git a/src/compiler/js-typed-lowering.h b/src/compiler/js-typed-lowering.h
index ba160c491faa9b9acb0391c896c716976dda996b..3dfcefdfc4fab248a91c763f8aeb457bdfbb8f72 100644
--- a/src/compiler/js-typed-lowering.h
+++ b/src/compiler/js-typed-lowering.h
@@ -41,6 +41,7 @@ class JSTypedLowering FINAL : public Reducer {
   Reduction ReduceJSEqual(Node* node, bool invert);
   Reduction ReduceJSStrictEqual(Node* node, bool invert);
   Reduction ReduceJSToNumberInput(Node* input);
+  Reduction ReduceJSToNumber(Node* node);
   Reduction ReduceJSToStringInput(Node* input);
   Reduction ReduceJSToBooleanInput(Node* input);
   Reduction ReduceJSToBoolean(Node* node);