[turbofan] Proper dead code elimination as regular reducer.

src/compiler/common-operator.cc

Index: src/compiler/common-operator.cc
diff --git a/src/compiler/common-operator.cc b/src/compiler/common-operator.cc
index c58fc7cd3d677e0e49e376a141873add27368cff..406b18479f9a8999066f6fecdcd47abb4da2ebce 100644
--- a/src/compiler/common-operator.cc
+++ b/src/compiler/common-operator.cc
@@ -116,9 +116,7 @@ std::ostream& operator<<(std::ostream& os, ParameterInfo const& i) {
 
 
 #define CACHED_OP_LIST(V)                                  \
-  V(DeadValue, Operator::kPure, 0, 0, 0, 1, 0, 0)          \
-  V(DeadEffect, Operator::kPure, 0, 0, 0, 0, 1, 0)         \
-  V(DeadControl, Operator::kFoldable, 0, 0, 0, 0, 0, 1)    \
+  V(Dead, Operator::kFoldable, 0, 0, 0, 1, 1, 1)           \
   V(IfTrue, Operator::kKontrol, 0, 0, 1, 0, 0, 1)          \
   V(IfFalse, Operator::kKontrol, 0, 0, 1, 0, 0, 1)         \
   V(IfSuccess, Operator::kKontrol, 0, 0, 1, 0, 0, 1)       \