[turbofan] Renamed the ChangeFloat64ToInt64 operator to TruncateFloat64ToInt64.

src/compiler/machine-operator.cc

Index: src/compiler/machine-operator.cc
diff --git a/src/compiler/machine-operator.cc b/src/compiler/machine-operator.cc
index d310ab8d097b8510ff59c13671570854b5721e33..1fd6187f8faf21639550e393810e7df98605f273 100644
--- a/src/compiler/machine-operator.cc
+++ b/src/compiler/machine-operator.cc
@@ -135,7 +135,7 @@ CheckedStoreRepresentation CheckedStoreRepresentationOf(Operator const* op) {
   V(ChangeFloat32ToFloat64, Operator::kNoProperties, 1, 0, 1)                 \
   V(ChangeFloat64ToInt32, Operator::kNoProperties, 1, 0, 1)                   \
   V(ChangeFloat64ToUint32, Operator::kNoProperties, 1, 0, 1)                  \
-  V(ChangeFloat64ToInt64, Operator::kNoProperties, 1, 0, 1)                   \
+  V(TruncateFloat64ToInt64, Operator::kNoProperties, 1, 0, 1)                 \
   V(TruncateFloat64ToUint64, Operator::kNoProperties, 1, 0, 1)                \
   V(ChangeInt32ToFloat64, Operator::kNoProperties, 1, 0, 1)                   \
   V(RoundInt64ToFloat32, Operator::kNoProperties, 1, 0, 1)                    \