[PATCH] D154009: [InstCombine] Folding `(inttoptr (and (ptrtoint Ptr), Mask))` -> `@llvm.ptrmask(Ptr, Mask)`

Wed Jun 28 14:39:20 PDT 2023

goldstein.w.n added a comment.

In D154009#4457421 <https://reviews.llvm.org/D154009#4457421>, @nikic wrote:

> This is not legal -- the fact that this is not legal is pretty much the whole reason why the ptrmask intrinsic exists in the first place. ptrmask preserves the provenance of the base object, while the ptrtoint/inttoptr sequence does not. The result of the inttoptr can have different provenance than the ptrtoint operand.

IC. Okay will abandon (likewise the rest of the series). Is there any way to get `@llvm.ptrmask` to generate in C code? Was having trouble doing that hence this patch.

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https://reviews.llvm.org/D154009