[llvm-branch-commits] [GISelValueTracking] Use representation size for G_PTRTOINT src width (PR #139608)

[Alexander Richardson via llvm-branch-commits]

arichardson wrote:

The current behaviour is definitely buggy since we lower G_PTRTOINT as a COPY node, but assume that it zeroes the upper bits for ptr addrspace(8). I think this patch is sufficient to prevent that issue.

https://github.com/llvm/llvm-project/pull/139608