[turbofan] Decouple OSR entry from {OsrPoll} bytecode.

src/compiler/bytecode-graph-builder.h

 // Copyright 2015 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_BYTECODE_GRAPH_BUILDER_H_
 #define V8_COMPILER_BYTECODE_GRAPH_BUILDER_H_
 
 #include "src/compiler/bytecode-branch-analysis.h"
 #include "src/compiler/bytecode-loop-analysis.h"
 #include "src/compiler/js-graph.h"
@@ skipping 152 matching lines @@
   void BuildJumpIfNotHole();
 
   // Simulates control flow by forward-propagating environments.
   void MergeIntoSuccessorEnvironment(int target_offset);
   void BuildLoopHeaderEnvironment(int current_offset);
   void SwitchToMergeEnvironment(int current_offset);
 
   // Simulates control flow that exits the function body.
   void MergeControlToLeaveFunction(Node* exit);
 
+  // Builds entry points that are used by OSR deconstruction.
+  void BuildOSRLoopEntryPoint(int current_offset);
+  void BuildOSRNormalEntryPoint();
+
   // Builds loop exit nodes for every exited loop between the current bytecode
   // offset and {target_offset}.
   void BuildLoopExitsForBranch(int target_offset);
   void BuildLoopExitsForFunctionExit();
   void BuildLoopExitsUntilLoop(int loop_offset);
 
   // Simulates entry and exit of exception handlers.
   void EnterAndExitExceptionHandlers(int current_offset);
 
   // Growth increment for the temporary buffer used to construct input lists to
@@ skipping 109 matching lines @@
   static int const kBinaryOperationSmiHintIndex = 2;
 
   DISALLOW_COPY_AND_ASSIGN(BytecodeGraphBuilder);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_BYTECODE_GRAPH_BUILDER_H_