[llvm] [LV] Vectorize histogram operations (PR #99851)

[Florian Hahn via llvm-commits]

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@@ -0,0 +1,44 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
+; RUN: opt < %s -passes=loop-vectorize,instcombine -enable-histogram-loop-vectorization -S | FileCheck %s
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fhahn wrote:

would this vectorize with `-force-vector-width=2` or something like that?

https://github.com/llvm/llvm-project/pull/99851