aeubanks added a comment.

In D111270#3060484 <https://reviews.llvm.org/D111270#3060484>, @dblaikie wrote:

> Plan is still to address the "this only works with disable free" issue? (I've 
> some preference that be addressed before this feature is turned on by default)

https://reviews.llvm.org/D111767. Thanks for pushing back, this actually does 
help a bit more with memory savings. I was worried that we'd be doing a bunch 
of pointer chasing if we supported -clear-ast-before-backend without 
-disable-free but couldn't measure any runtime regressions aside from some 
nullifying tiny wins gained by this patch.

> & is there a flag to pass to turn this off if someone had trouble with it? 
> (doesn't necessarily have to be, but just checking)

Just like `-disable-free` doesn't have a flag, I don't want one for this at 
least for now. I'd rather just revert this change and fix any issues. If we 
come across weird issues then we may have to add a flag.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D111270/new/

https://reviews.llvm.org/D111270

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