llvm-project

f7629f59 - [InferAddressSpaces] Extend undef pointer operand support to phi inst (#159548)

[InferAddressSpaces] Extend undef pointer operand support to phi inst (#159548) Previously undef pointer operand is only supported for select inst, where undef in generic AS behaves like `take the other side`. This PR extends the support to other instructions, e.g. phi inst. Defer joining and inferring constant pointer operand until all other operand AS states considered. --------- Co-authored-by: Matt Arsenault <arsenm2@gmail.com>