[PATCH] D109499: [DebugInfo][NFC] Erase capacity in DWARFUnit::clearDIEs().

[Alexey Lapshin via Phabricator via llvm-commits]

avl added a comment.

I used clearDIEs() in this patch https://reviews.llvm.org/D96035 and observed that memory is not freed. Looking at the reason I found that shrink_to_fit() does not change a capacity and as the result the memory stay used.

The use case in D96035 <https://reviews.llvm.org/D96035> is: load dies of DWARFUnit, clone dies to output, clean loaded dies by calling DWARFUnit::clear().

The comment says that it is not guaranteed that capacity would be reduced:

  /**  A non-binding request to reduce capacity() to size().  */
  void
  shrink_to_fit()


Repository:
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  https://reviews.llvm.org/D109499/new/

https://reviews.llvm.org/D109499