[turbofan] Introduce DeadValue and DeadEffect operators.

src/compiler/opcodes.h

Index: src/compiler/opcodes.h
diff --git a/src/compiler/opcodes.h b/src/compiler/opcodes.h
index fc67e740f6cd149279994de3cdba44873d586a9d..1c2a23c00cb47ccb5cf18243ed22f5aed5e399f1 100644
--- a/src/compiler/opcodes.h
+++ b/src/compiler/opcodes.h
@@ -10,7 +10,6 @@
 // Opcodes for control operators.
 #define CONTROL_OP_LIST(V) \
   V(Start)                 \
-  V(Dead)                  \
   V(Loop)                  \
   V(Branch)                \
   V(Switch)                \
@@ -27,6 +26,7 @@
   V(Terminate)             \
   V(OsrNormalEntry)        \
   V(OsrLoopEntry)          \
+  V(DeadControl)           \
   V(Throw)                 \
   V(End)
 
@@ -57,7 +57,10 @@
 
 #define COMMON_OP_LIST(V) \
   CONSTANT_OP_LIST(V)     \
-  INNER_OP_LIST(V)
+  INNER_OP_LIST(V)        \
+  V(DeadEffect)           \
+  V(DeadValue)
+
 
 // Opcodes for JavaScript operators.
 #define JS_COMPARE_BINOP_LIST(V) \
@@ -318,7 +321,7 @@ class IrOpcode {
 
   // Returns true if opcode for common operator.
   static bool IsCommonOpcode(Value value) {
-    return kStart <= value && value <= kProjection;
+    return kStart <= value && value <= kDeadValue;
   }
 
   // Returns true if opcode for control operator.