Rollback of r14587 in trunk branch.

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index 3ea99d40a64415c3571b21f2195d2f6b9384c28a..467e67fb8181d35198ae60ccc3ccb7f2598e3fc7 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -3363,27 +3363,16 @@ class HBinaryOperation: public HTemplateInstruction<3> {
   HValue* left() { return OperandAt(1); }
   HValue* right() { return OperandAt(2); }
 
-  // True if switching left and right operands likely generates better code.
-  bool AreOperandsBetterSwitched() {
-    if (!IsCommutative()) return false;
-
-    // Constant operands are better off on the right, they can be inlined in
-    // many situations on most platforms.
-    if (left()->IsConstant()) return true;
-    if (right()->IsConstant()) return false;
-
-    // Otherwise, if there is only one use of the right operand, it would be
-    // better off on the left for platforms that only have 2-arg arithmetic
-    // ops (e.g ia32, x64) that clobber the left operand.
-    return (right()->UseCount() == 1);
-  }
-
-  HValue* BetterLeftOperand() {
-    return AreOperandsBetterSwitched() ? right() : left();
+  // TODO(kasperl): Move these helpers to the IA-32 Lithium
+  // instruction sequence builder.
+  HValue* LeastConstantOperand() {
+    if (IsCommutative() && left()->IsConstant()) return right();
+    return left();
   }
 
-  HValue* BetterRightOperand() {
-    return AreOperandsBetterSwitched() ? left() : right();
+  HValue* MostConstantOperand() {
+    if (IsCommutative() && left()->IsConstant()) return left();
+    return right();
   }
 
   void set_observed_input_representation(int index, Representation rep) {