[llvm] [AMDGPU] add s_bitset[10]_b32 optimization for shl+[or, andn2] pattern (PR #134155)

[Matt Arsenault via llvm-commits]

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+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
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arsenm wrote:

Test name should be more descriptive and mention issue, not just be a number 

https://github.com/llvm/llvm-project/pull/134155