[turbofan] Introduce DeadValue and DeadEffect operators.

src/compiler/operator-properties.cc

Index: src/compiler/operator-properties.cc
diff --git a/src/compiler/operator-properties.cc b/src/compiler/operator-properties.cc
index 4a7f1d9a2c2a06047cc0dcd1e979f4ae83459363..dce4f42db40199e800203b1440f59c7dda2ce595 100644
--- a/src/compiler/operator-properties.cc
+++ b/src/compiler/operator-properties.cc
@@ -117,7 +117,7 @@ int OperatorProperties::GetTotalInputCount(const Operator* op) {
 bool OperatorProperties::IsBasicBlockBegin(const Operator* op) {
   Operator::Opcode const opcode = op->opcode();
   return opcode == IrOpcode::kStart || opcode == IrOpcode::kEnd ||
-         opcode == IrOpcode::kDead || opcode == IrOpcode::kLoop ||
+         opcode == IrOpcode::kDeadControl || opcode == IrOpcode::kLoop ||
          opcode == IrOpcode::kMerge || opcode == IrOpcode::kIfTrue ||
          opcode == IrOpcode::kIfFalse || opcode == IrOpcode::kIfSuccess ||
          opcode == IrOpcode::kIfException || opcode == IrOpcode::kIfValue ||