NoQ added a comment.

Mmm, i think loop widening simply shouldn't invalidate references (though it 
should invalidate objects bound to them). Simply because you can't really 
reassign a reference.

Could we mark them as "preserve contents", like in 
https://reviews.llvm.org/D45491?


Repository:
  rC Clang

https://reviews.llvm.org/D47044



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