[turbofan]: More optimizations to add and subtract operations on x64

src/compiler/instruction-selector.h

Index: src/compiler/instruction-selector.h
diff --git a/src/compiler/instruction-selector.h b/src/compiler/instruction-selector.h
index 4e916befb19b285628e9bd5ec3f909a643175221..288932d06a2ff8d04879c71edd817990771fc515 100644
--- a/src/compiler/instruction-selector.h
+++ b/src/compiler/instruction-selector.h
@@ -98,6 +98,8 @@ class InstructionSelector FINAL {
   // ============ Architecture-independent graph covering methods. =============
   // ===========================================================================
 
+  bool ValueOwnedBy(Node* owner, Node* value) const;
+
   // Used in pattern matching during code generation.
   // Check if {node} can be covered while generating code for the current
   // instruction. A node can be covered if the {user} of the node has the only