[turbofan] Introduce node regions for protection from scheduling.

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 <vector>
 
 #include "src/assembler.h"
 #include "src/compiler/common-operator.h"
@@ skipping 243 matching lines @@
                                  "control2", control2_matcher_, listener));
   }
 
  private:
   const Matcher<Node*> control0_matcher_;
   const Matcher<Node*> control1_matcher_;
   const Matcher<Node*> control2_matcher_;
 };
 
 
-class IsFinishMatcher final : public NodeMatcher {
+class IsBeginRegionMatcher final : public NodeMatcher {
  public:
-  IsFinishMatcher(const Matcher<Node*>& value_matcher,
-                  const Matcher<Node*>& effect_matcher)
-      : NodeMatcher(IrOpcode::kFinish),
+  explicit IsBeginRegionMatcher(const Matcher<Node*>& effect_matcher)
+      : NodeMatcher(IrOpcode::kBeginRegion), effect_matcher_(effect_matcher) {}
+
+  void DescribeTo(std::ostream* os) const final {
+    NodeMatcher::DescribeTo(os);
+    *os << " whose effect (";
+    effect_matcher_.DescribeTo(os);
+    *os << ")";
+  }
+
+  bool MatchAndExplain(Node* node, MatchResultListener* listener) const final {
+    return (NodeMatcher::MatchAndExplain(node, listener) &&
+            PrintMatchAndExplain(NodeProperties::GetEffectInput(node), "effect",
+                                 effect_matcher_, listener));
+  }
+
+ private:
+  const Matcher<Node*> effect_matcher_;
+};
+
+
+class IsFinishRegionMatcher final : public NodeMatcher {
+ public:
+  IsFinishRegionMatcher(const Matcher<Node*>& value_matcher,
+                        const Matcher<Node*>& effect_matcher)
+      : NodeMatcher(IrOpcode::kFinishRegion),
         value_matcher_(value_matcher),
         effect_matcher_(effect_matcher) {}
 
   void DescribeTo(std::ostream* os) const final {
     NodeMatcher::DescribeTo(os);
     *os << " whose value (";
     value_matcher_.DescribeTo(os);
     *os << ") and effect (";
     effect_matcher_.DescribeTo(os);
     *os << ")";
@@ skipping 1215 matching lines @@
   return MakeMatcher(new IsIfValueMatcher(value_matcher, control_matcher));
 }
 
 
 Matcher<Node*> IsIfDefault(const Matcher<Node*>& control_matcher) {
   return MakeMatcher(
       new IsControl1Matcher(IrOpcode::kIfDefault, control_matcher));
 }
 
 
-Matcher<Node*> IsValueEffect(const Matcher<Node*>& value_matcher) {
-  return MakeMatcher(new IsUnopMatcher(IrOpcode::kValueEffect, value_matcher));
+Matcher<Node*> IsBeginRegion(const Matcher<Node*>& effect_matcher) {
+  return MakeMatcher(new IsBeginRegionMatcher(effect_matcher));
 }
 
 
-Matcher<Node*> IsFinish(const Matcher<Node*>& value_matcher,
-                        const Matcher<Node*>& effect_matcher) {
-  return MakeMatcher(new IsFinishMatcher(value_matcher, effect_matcher));
+Matcher<Node*> IsFinishRegion(const Matcher<Node*>& value_matcher,
+                              const Matcher<Node*>& effect_matcher) {
+  return MakeMatcher(new IsFinishRegionMatcher(value_matcher, effect_matcher));
 }
 
 
 Matcher<Node*> IsReturn(const Matcher<Node*>& value_matcher,
                         const Matcher<Node*>& effect_matcher,
                         const Matcher<Node*>& control_matcher) {
   return MakeMatcher(
       new IsReturnMatcher(value_matcher, effect_matcher, control_matcher));
 }
 
@@ skipping 526 matching lines @@
 IS_UNOP_MATCHER(Float64ExtractHighWord32)
 IS_UNOP_MATCHER(NumberToInt32)
 IS_UNOP_MATCHER(NumberToUint32)
 IS_UNOP_MATCHER(ObjectIsSmi)
 IS_UNOP_MATCHER(Word32Clz)
 #undef IS_UNOP_MATCHER
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8