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

[Florian Hahn via llvm-commits]

================
@@ -0,0 +1,161 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
+; RUN: opt -passes=loop-vectorize -force-vector-interleave=1 -force-target-instruction-cost=1 -S < %s | FileCheck %s --check-prefix=CHECK-NODOTPROD
----------------
fhahn wrote:

If this is just for testing the TTI logic, is it sufficient to have a single test rather than adding check lines for all tests?

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