[llvm] [LoopVectorize] Improve Vectorization of Low Trip Count Loops (PR #195823)

[Florian Hahn via llvm-commits]

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@@ -0,0 +1,109 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --version 6
+;
+; Test that a loop with trip count == VF + 1 is allowed to vectorize
+; on RISCV where under getMinTripCountTailFoldingThreshold(). This
+; produces the required number of vector iteration and one scalar iteration.
+;
+; RUN: opt -S -p loop-vectorize %s -mtriple=riscv64 -mattr=+v -tail-folding-policy=dont-fold-tail | FileCheck %s
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fhahn wrote:

I think the RISCV tests either need their check lines updating or the flag adding.

https://github.com/llvm/llvm-project/pull/195823