[PATCH] D136882: ConstantFold: Fold out compare of addrspacecasted null with global

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added a comment.

In D136882#3892296 <https://reviews.llvm.org/D136882#3892296>, @jdoerfert wrote:

> Do we have a target hook `isNullPtrValid(unsigned AS)`?

No. I would like that information to be encoded in the data layout. I was hoping I could get this fold without doing that much larger change


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