[llvm] [LV]Support dropping of nneg flag for zext widencast recipes. (PR #74112)

[Florian Hahn via llvm-commits]

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@@ -0,0 +1,104 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
+; RUN: opt -passes=loop-vectorize -S -mtriple=riscv64-unknown-linux-gnu -mattr=+v < %s | FileCheck %s
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fhahn wrote:

Ah right, this needs a target with masked gather-scatter support. The existing tests are in `llvm/test/Transforms/LoopVectorize/X86/drop-poison-generating-flags.ll` might be good to consolidate them there.

https://github.com/llvm/llvm-project/pull/74112