[PATCH] D106289: [InstCombine] Fold phi ( inttoptr/ptrtoint x ) to phi (x)

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri added a comment.

In D106289#2916089 <https://reviews.llvm.org/D106289#2916089>, @aqjune wrote:

> I have a question about addrspacecast: is ptrtoint(inttoptr(ptrtoint pty1 p) to pty2) equivalent to ptrtoint(addrspacecast pty1 p to pty2)?
> Does anyone have idea about this?

I'm going to guess no. `inttoptr`/`ptrtoint` are essentially no-op bitcasts,
while `addrspacecast` is implementation-defined and in general case can be assumed to e.g. offset the pointer.


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