[wasm] Generate source position information

src/compiler/source-position.h

Index: src/compiler/source-position.h
diff --git a/src/compiler/source-position.h b/src/compiler/source-position.h
index 81db1d2e3eff4f97d0f93e484b83d321b8115259..e50d1f72cc01f9aa2c0ab91f3c1ba1eda0d6d758 100644
--- a/src/compiler/source-position.h
+++ b/src/compiler/source-position.h
@@ -75,6 +75,10 @@ class SourcePositionTable final {
 
   SourcePosition GetSourcePosition(Node* node) const;
 

[Michael Starzinger, 2016/04/22 11:30:21]

nit: Drop empty newline between getter and setter for readability.

[Clemens Hammacher, 2016/04/22 13:46:40]

It's already there (getter on line 76, setter on 78)? ;)

+  void SetSourcePosition(Node* node, SourcePosition position);
+
+  Graph* GetGraph() const { return graph_; }

[Michael Starzinger, 2016/04/22 11:30:21]

nit: s/GetGraph/graph/ for this simple accessor. Also AFAICT the getter is only
needed for a DCHECK. I cannot judge the importance of the DCHECK, but if its
importance is negligible then I would vote for also dropping this getter.

[Clemens Hammacher, 2016/04/22 13:46:40]

OK, dropped it.

+
   void Print(std::ostream& os) const;
 
  private: