[llvm] [LV][VPlan] Add initial support for CSA vectorization (PR #106560)

[Florian Hahn via llvm-commits]

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

Can the general code-gen parts be tested independent of RISCV? Could you add a test checking the printed VPlan containing the CAS recipes?

https://github.com/llvm/llvm-project/pull/106560