[PATCH] D120286: AMDGPU: Don't use unreachable on stores to unhandled address space

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added a comment.

In D120286#3336509 <https://reviews.llvm.org/D120286#3336509>, @rampitec wrote:

> In fact not only the stores but atomics as well including atomic load. It is probably better to declare it an invalid IR. The only exception when it might make any sense to lower it as a global is the atomic load, although it is not really needed so there is no need to open this can of worms.

We at least need to produce the same error in debug vs. release, which this achieves


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