hokein added a comment.

>>> @hokein or I will try to find time to take a stab at this.
>>
>> Awesome, please keep me in the loop.
>
> Will do!

https://reviews.llvm.org/D134942 is my attempt.

In D20401#2770059 <https://reviews.llvm.org/D20401#2770059>, @nickdesaulniers 
wrote:

>> I discussed this bug with Argyrios off-list, who lgtm'd on the condition 
>> that it doesn't introduce a performance regression.
>
> Well, I'd say it's a performance regression, though perhaps reported 5 years 
> too late.

This patch does increase the number of SLocEntries. At least for SemaExpr.cpp, 
prior this patch it is ~298K, after this patch it is ~315K (~5% increase).


Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D20401/new/

https://reviews.llvm.org/D20401

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