riccibruno added inline comments.

================
Comment at: lib/Sema/SemaExpr.cpp:11301
+    EmitArgumentsValueModification(E);
+
   SourceLocation OrigLoc = Loc;
----------------
Comments:

1. Shouldn't you mark the variable to be modified only if 
`CheckForModifiableLvalue` returns true ?

2. I think that you need to handle way more than just member expressions. For 
example are you handling `(x, y)` (comma operator) ? But hard-coding every 
cases here is probably not ideal. It would be nice if there was already some 
code somewhere that could help you do this.

3. I believe that a `MemberExpr` has always a base. Similarly `DeclRefExpr`s 
always have a referenced declaration (so you can omit the `if`).


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D58035/new/

https://reviews.llvm.org/D58035



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