[turbofan] Support lowering of ChangeFloat64ToTagged/ChangeTaggedToInt32.

test/compiler-unittests/graph-unittest.cc

Index: test/compiler-unittests/graph-unittest.cc
diff --git a/test/compiler-unittests/graph-unittest.cc b/test/compiler-unittests/graph-unittest.cc
index e5b413c545260c519d8697a1556702ec85a499c7..5a816c2545262d366fe420889e1984c8fc97b149 100644
--- a/test/compiler-unittests/graph-unittest.cc
+++ b/test/compiler-unittests/graph-unittest.cc
@@ -8,6 +8,7 @@
 
 #include "src/compiler/node-properties-inl.h"
 
+using testing::_;
 using testing::MakeMatcher;
 using testing::MatcherInterface;
 using testing::MatchResultListener;
@@ -39,6 +40,19 @@ GraphTest::GraphTest(int num_parameters) : graph_(zone()) {
 GraphTest::~GraphTest() {}
 
 
+Matcher<Node*> GraphTest::IsAllocateHeapNumber(
+    const Matcher<Node*>& effect_matcher,
+    const Matcher<Node*>& control_matcher) {
+  return IsCall(
+      _, IsHeapConstant(PrintableUnique<HeapObject>::CreateImmovable(
+             zone(), CEntryStub(isolate(), 1).GetCode())),
+      IsExternalConstant(ExternalReference(
+          Runtime::FunctionForId(Runtime::kAllocateHeapNumber), isolate())),
+      IsInt32Constant(0), IsNumberConstant(0.0), effect_matcher,
+      control_matcher);
+}
+
+
 namespace {
 
 template <typename T>
@@ -567,6 +581,11 @@ Matcher<Node*> IsControlEffect(const Matcher<Node*>& 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));
@@ -671,6 +690,7 @@ IS_BINOP_MATCHER(Int32AddWithOverflow)
     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