[turbofan] IA: support better left operand for commutative binops

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 a86e1560c6994c201094ecae149cd4ec1fca5c08..491b8272313b4ed4665903a0a8c5e994ccf67ed0 100644
--- a/src/compiler/instruction-selector.h
+++ b/src/compiler/instruction-selector.h
@@ -84,6 +84,14 @@ class InstructionSelector FINAL {
     return Features(CpuFeatures::SupportedFeatures());
   }
 
+  // Checks if {node} was already defined, and therefore code was already
+  // generated for it.
+  bool IsDefined(Node* node) const;
+
+  // Checks if {node} has any uses, and therefore code has to be generated for
+  // it.
+  bool IsUsed(Node* node) const;
+
  private:
   friend class OperandGenerator;
 
@@ -101,17 +109,9 @@ class InstructionSelector FINAL {
   // edge and the two are in the same basic block.
   bool CanCover(Node* user, Node* node) const;
 
-  // Checks if {node} was already defined, and therefore code was already
-  // generated for it.
-  bool IsDefined(Node* node) const;
-
   // Inform the instruction selection that {node} was just defined.
   void MarkAsDefined(Node* node);
 
-  // Checks if {node} has any uses, and therefore code has to be generated for
-  // it.
-  bool IsUsed(Node* node) const;
-
   // Inform the instruction selection that {node} has at least one use and we
   // will need to generate code for it.
   void MarkAsUsed(Node* node);