[llvm] [LV] Add support for cmp reductions with decreasing IVs. (PR #140451)

[Florian Hahn via llvm-commits]

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@@ -1760,55 +1760,178 @@ define i64 @not_vectorized_select_decreasing_induction_icmp_const_start(ptr %a)
 ; CHECK-VF4IC1-LABEL: define i64 @not_vectorized_select_decreasing_induction_icmp_const_start(
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fhahn wrote:

that should also been taken care of now after moving & adjusting tests

https://github.com/llvm/llvm-project/pull/140451