[llvm] [AArch64] Update Cost model for CLMUL (PR #202965)

[Matthew Devereau via llvm-commits]

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@@ -1,17 +1,109 @@
 ; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
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MDevereau wrote:

I've split scalar, fixed and scalable into 3 separate files now

https://github.com/llvm/llvm-project/pull/202965