[llvm] [AMDGPU] Verify SdwaSel value range (PR #128898)

[Matt Arsenault via llvm-commits]

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+# RUN: not --crash llc -mtriple=amdgcn -mcpu=gfx1030 --verify-machineinstrs -o - %s 2>&1 | FileCheck %s
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arsenm wrote:

Don't need -verify-machineinstrs, can use -run-pass=none, and this belongs in test/MachineVerifier/AMDGPU 

https://github.com/llvm/llvm-project/pull/128898