[turbofan] Remove last_use_ field from Node.

test/unittests/compiler/node-test-utils.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 "test/unittests/compiler/node-test-utils.h"
 
 #include "src/assembler.h"
 #include "src/compiler/node-properties.h"
 #include "src/compiler/simplified-operator.h"
 #include "src/unique.h"
@@ skipping 525 matching lines @@
   void DescribeTo(std::ostream* os) const FINAL {
     NodeMatcher::DescribeTo(os);
     *os << "), effect0 (";
     effect0_matcher_.DescribeTo(os);
     *os << ") and effect1 (";
     effect1_matcher_.DescribeTo(os);
     *os << ")";
   }
 
   bool MatchAndExplain(Node* node, MatchResultListener* listener) const FINAL {
-    return (NodeMatcher::MatchAndExplain(node, listener) &&
-            PrintMatchAndExplain(NodeProperties::GetEffectInput(node, 0),
-                                 "effect0", effect0_matcher_, listener) &&
-            PrintMatchAndExplain(NodeProperties::GetEffectInput(node, 1),
-                                 "effect1", effect1_matcher_, listener));
+    if (!NodeMatcher::MatchAndExplain(node, listener)) return false;
+
+    Node* effect0 = NodeProperties::GetEffectInput(node, 0);
+    Node* effect1 = NodeProperties::GetEffectInput(node, 1);
+
+    {
+      // Try matching in the reverse order first.
+      StringMatchResultListener value_listener;
+      if (effect0_matcher_.MatchAndExplain(effect1, &value_listener) &&
+          effect1_matcher_.MatchAndExplain(effect0, &value_listener)) {
+        return true;
+      }
+    }
+
+    return PrintMatchAndExplain(effect0, "effect0", effect0_matcher_,
+                                listener) &&
+           PrintMatchAndExplain(effect1, "effect1", effect1_matcher_, listener);
   }
 
  private:
   const Matcher<Node*> effect0_matcher_;
   const Matcher<Node*> effect1_matcher_;
 };
 
 
 class IsProjectionMatcher FINAL : public NodeMatcher {
  public:
@@ skipping 1059 matching lines @@
 IS_UNOP_MATCHER(Float64ExtractHighWord32)
 IS_UNOP_MATCHER(NumberToInt32)
 IS_UNOP_MATCHER(NumberToUint32)
 IS_UNOP_MATCHER(ObjectIsSmi)
 IS_UNOP_MATCHER(ObjectIsNonNegativeSmi)
 #undef IS_UNOP_MATCHER
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8