[llvm] [LoopUnrollPass] Don't pre-set `UP.Count` before legality checks in `computeUnrollCount()` (PR #185979)

[Nikita Popov via llvm-commits]

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@@ -0,0 +1,92 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -S -passes=loop-unroll -mattr=+no-default-unroll | FileCheck %s
+
+; REQUIRES: riscv-registered-target
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nikic wrote:

I see. Maybe add that as a comment to the test?

https://github.com/llvm/llvm-project/pull/185979