goldsteinn wrote:

> We should update LangRef and require that the integer arg has the size of the 
> pointer index type 
As in disallow say `ptrmask.p0.i32` on typical systems with 64-bit 
pointer/index?

> (with current GEP semantics implying a 1-extend to pointer type width), 
> implement a Verifier check for that, and add an assert in SDAG lowering that 
> the index type size is the pointer size -- I don't believe we currently have 
> any in-tree SDAG support for pointers with narrow index types, so this is 
> just a breadcrumb for out-of-tree targets to implement a 1-extend at that 
> point.
> 
> I was planning to do this, but never found the time.



https://github.com/llvm/llvm-project/pull/67166
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