[turbofan] Introduce DeadValue and DeadEffect operators.

src/compiler/opcodes.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_OPCODES_H_
 #define V8_COMPILER_OPCODES_H_
 
 #include <iosfwd>
 
 // Opcodes for control operators.
 #define CONTROL_OP_LIST(V) \
   V(Start)                 \
   V(Dead)                  \

[Benedikt Meurer, 2015/06/18 07:16:53]

Nit: Please rename this to DeadControl.

[Michael Starzinger, 2015/06/18 07:49:28]

Done. Also moved it down a bit.

   V(Loop)                  \
   V(Branch)                \
   V(Switch)                \
   V(IfTrue)                \
   V(IfFalse)               \
   V(IfSuccess)             \
   V(IfException)           \
   V(IfValue)               \
   V(IfDefault)             \
   V(Merge)                 \
@@ skipping 16 matching lines @@
   V(NumberConstant)         \
   V(HeapConstant)
 
 #define INNER_OP_LIST(V) \
   V(Select)              \
   V(Phi)                 \
   V(EffectSet)           \
   V(EffectPhi)           \
   V(ValueEffect)         \
   V(Finish)              \
+  V(DeadValue)           \

[Benedikt Meurer, 2015/06/18 07:16:53]

Nit: Please move these two to COMMON_OP_LIST

[Michael Starzinger, 2015/06/18 07:49:28]

Done.

+  V(DeadEffect)          \
   V(FrameState)          \
   V(StateValues)         \
   V(TypedStateValues)    \
   V(Call)                \
   V(Parameter)           \
   V(OsrValue)            \
   V(Projection)
 
 #define COMMON_OP_LIST(V) \
   CONSTANT_OP_LIST(V)     \
@@ skipping 296 matching lines @@
   }
 };
 
 std::ostream& operator<<(std::ostream&, IrOpcode::Value);
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_OPCODES_H_