[turbofan] Move OSR BailoutId translation into graph builder.

src/compiler/bytecode-graph-builder.h

Index: src/compiler/bytecode-graph-builder.h
diff --git a/src/compiler/bytecode-graph-builder.h b/src/compiler/bytecode-graph-builder.h
index 65e5042d9d7573d93c3f8b7de3a2b743d5f8193b..a4dba43fdf7618368aa339795f9d572c964bc45a 100644
--- a/src/compiler/bytecode-graph-builder.h
+++ b/src/compiler/bytecode-graph-builder.h
@@ -205,6 +205,10 @@ class BytecodeGraphBuilder {
   // Simulates entry and exit of exception handlers.
   void EnterAndExitExceptionHandlers(int current_offset);
 
+  // Update [source_positions_]'s current position to that of the bytecode at
+  // [offset], if any.

[Jarin, 2016/10/31 14:59:39]

Nit: above we seem to be using "{offset}" to refer to code, perhaps we should do
the same here?

+  void UpdateCurrentSourcePosition(SourcePositionTableIterator* it, int offset);
+
   // Growth increment for the temporary buffer used to construct input lists to
   // new nodes.
   static const int kInputBufferSizeIncrement = 64;
@@ -285,6 +289,7 @@ class BytecodeGraphBuilder {
   const BytecodeLoopAnalysis* loop_analysis_;
   Environment* environment_;
   BailoutId osr_ast_id_;
+  int osr_loop_offset_;
 
   // Merge environments are snapshots of the environment at points where the
   // control flow merges. This models a forward data flow propagation of all
@@ -314,13 +319,9 @@ class BytecodeGraphBuilder {
   // Analyzer of register liveness.
   LivenessAnalyzer liveness_analyzer_;
 
-  // The Turbofan source position table, to be populated.
+  // The source position table, to be populated.
   SourcePositionTable* source_positions_;
 
-  // Update [source_positions_]'s current position to that of the bytecode at
-  // [offset], if any.
-  void UpdateCurrentSourcePosition(SourcePositionTableIterator* it, int offset);
-
   static int const kBinaryOperationHintIndex = 1;
   static int const kCountOperationHintIndex = 0;
   static int const kBinaryOperationSmiHintIndex = 2;