Reland of [turbofan] Insert dummy values when changing from None type.

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 43c6202eb7b4b044328f07f9e5a597865f9afb6a..e033e4c829bc30e07b3f0edb351a5cdc2f69daf9 100644
--- a/src/compiler/machine-operator.cc
+++ b/src/compiler/machine-operator.cc
@@ -145,12 +145,6 @@ MachineRepresentation AtomicStoreRepresentationOf(Operator const* op) {
   V(ChangeInt32ToInt64, Operator::kNoProperties, 1, 0, 1)                    \
   V(ChangeUint32ToFloat64, Operator::kNoProperties, 1, 0, 1)                 \
   V(ChangeUint32ToUint64, Operator::kNoProperties, 1, 0, 1)                  \
-  V(ImpossibleToWord32, Operator::kNoProperties, 1, 0, 1)                    \
-  V(ImpossibleToWord64, Operator::kNoProperties, 1, 0, 1)                    \
-  V(ImpossibleToFloat32, Operator::kNoProperties, 1, 0, 1)                   \
-  V(ImpossibleToFloat64, Operator::kNoProperties, 1, 0, 1)                   \
-  V(ImpossibleToTagged, Operator::kNoProperties, 1, 0, 1)                    \
-  V(ImpossibleToBit, Operator::kNoProperties, 1, 0, 1)                       \
   V(TruncateFloat64ToFloat32, Operator::kNoProperties, 1, 0, 1)              \
   V(TruncateInt64ToInt32, Operator::kNoProperties, 1, 0, 1)                  \
   V(BitcastFloat32ToInt32, Operator::kNoProperties, 1, 0, 1)                 \