[llvm] [LoopVectorizer] Add support for partial reductions (PR #92418)

[Sam Tebbs via llvm-commits]

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@@ -91,6 +92,8 @@ struct MemIntrinsicInfo {
   }
 };
 
+enum PartialReductionExtendKind { PR_None, PR_SignExtend, PR_ZeroExtend };
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SamTebbs33 wrote:

Done.

https://github.com/llvm/llvm-project/pull/92418