[turbofan] Support lowering of ChangeFloat64ToTagged/ChangeTaggedToInt32.

test/compiler-unittests/graph-unittest.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/compiler-unittests/graph-unittest.h"
 
 #include <ostream>  // NOLINT(readability/streams)
 
 #include "src/compiler/node-properties-inl.h"
 
+using testing::_;
 using testing::MakeMatcher;
 using testing::MatcherInterface;
 using testing::MatchResultListener;
 using testing::StringMatchResultListener;
 
 namespace v8 {
 namespace internal {
 
 // TODO(bmeurer): Find a new home for these functions.
 template <typename T>
@@ skipping 539 matching lines @@
       new IsControl1Matcher(IrOpcode::kIfFalse, control_matcher));
 }
 
 
 Matcher<Node*> IsControlEffect(const Matcher<Node*>& control_matcher) {
   return MakeMatcher(
       new IsControl1Matcher(IrOpcode::kControlEffect, control_matcher));
 }
 
 
+Matcher<Node*> IsValueEffect(const Matcher<Node*>& value_matcher) {
+  return MakeMatcher(new IsUnopMatcher(IrOpcode::kValueEffect, value_matcher));
+}
+
+
 Matcher<Node*> IsFinish(const Matcher<Node*>& value_matcher,
                         const Matcher<Node*>& effect_matcher) {
   return MakeMatcher(new IsFinishMatcher(value_matcher, effect_matcher));
 }
 
 
 Matcher<Node*> IsExternalConstant(
     const Matcher<ExternalReference>& value_matcher) {
   return MakeMatcher(new IsConstantMatcher<ExternalReference>(
       IrOpcode::kExternalConstant, value_matcher));
@@ skipping 84 matching lines @@
 IS_BINOP_MATCHER(Word64Equal)
 IS_BINOP_MATCHER(Int32AddWithOverflow)
 #undef IS_BINOP_MATCHER
 
 
 #define IS_UNOP_MATCHER(Name)                                                \
   Matcher<Node*> Is##Name(const Matcher<Node*>& input_matcher) {             \
     return MakeMatcher(new IsUnopMatcher(IrOpcode::k##Name, input_matcher)); \
   }
 IS_UNOP_MATCHER(ConvertInt64ToInt32)
+IS_UNOP_MATCHER(ChangeFloat64ToInt32)
 IS_UNOP_MATCHER(ChangeInt32ToFloat64)
 #undef IS_UNOP_MATCHER
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8