Possible missed opportunity for register coalescing

[jrbyrnes]

See https://godbolt.org/z/vx6o4qf7M

The v_mov_b64_e32 are coming from an uncoalesced COPY. It's not clear why the COPY was not optimized out, and could be a missed opportunity.

[llvmbot]

@llvm/issue-subscribers-backend-amdgpu

Author: Jeffrey Byrnes (jrbyrnes)

See https://godbolt.org/z/vx6o4qf7M

The v_mov_b64_e32 are coming from an uncoalesced COPY. It's not clear why the COPY was not optimized out, and could be a missed opportunity.

[jrbyrnes]

Incorrect requirements.