Make start node a value input to parameter nodes.

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_
 
 // Opcodes for control operators.
 #define CONTROL_OP_LIST(V) \
   V(Start)                 \
   V(Dead)                  \
   V(Loop)                  \
   V(End)                   \
   V(Branch)                \
   V(IfTrue)                \
   V(IfFalse)               \
   V(Merge)                 \
   V(Return)                \
   V(Throw)                 \
   V(Continuation)          \
   V(LazyDeoptimization)    \
   V(Deoptimize)
 
 // Opcodes for common operators.
 #define LEAF_OP_LIST(V) \
-  V(Parameter)          \
   V(Int32Constant)      \
   V(Int64Constant)      \
   V(Float64Constant)    \
   V(ExternalConstant)   \
   V(NumberConstant)     \
   V(HeapConstant)
 
 #define INNER_OP_LIST(V) \
   V(Phi)                 \
   V(EffectPhi)           \
   V(FrameState)          \
   V(Call)                \
+  V(Parameter)           \
   V(Projection)
 
 #define COMMON_OP_LIST(V) \
   LEAF_OP_LIST(V)         \
   INNER_OP_LIST(V)
 
 // Opcodes for JavaScript operators.
 #define JS_COMPARE_BINOP_LIST(V) \
   V(JSEqual)                     \
   V(JSNotEqual)                  \
@@ skipping 238 matching lines @@
         return false;
     }
   }
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_OPCODES_H_