[turbofan] Remove redundant cmp operands swap.

src/compiler/x64/instruction-selector-x64.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <algorithm>
 
 #include "src/base/adapters.h"
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
@@ skipping 1757 matching lines @@
     return VisitCompare(selector, opcode, g.Use(left), g.UseImmediate(right),
                         cont);
   }
 
   // Match memory operands on left side of comparison.
   if (g.CanBeMemoryOperand(opcode, node, left, effect_level)) {
     return VisitCompareWithMemoryOperand(selector, opcode, left,
                                          g.UseRegister(right), cont);
   }
 
-  if (g.CanBeBetterLeftOperand(right)) {
-    if (!node->op()->HasProperty(Operator::kCommutative)) cont->Commute();
-    std::swap(left, right);
-  }
-
   return VisitCompare(selector, opcode, left, right, cont,
                       node->op()->HasProperty(Operator::kCommutative));
 }
 
 // Shared routine for 64-bit word comparison operations.
 void VisitWord64Compare(InstructionSelector* selector, Node* node,
                         FlagsContinuation* cont) {
   X64OperandGenerator g(selector);
   if (selector->CanUseRootsRegister()) {
     Heap* const heap = selector->isolate()->heap();
@@ skipping 584 matching lines @@
 // static
 MachineOperatorBuilder::AlignmentRequirements
 InstructionSelector::AlignmentRequirements() {
   return MachineOperatorBuilder::AlignmentRequirements::
       FullUnalignedAccessSupport();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8