[llvm] [VPlan] Set debug location for VPReduction/VPWidenPHI/VPWidenIntrinsicRecipe. (PR #120054)

[Elvis Wang via llvm-commits]

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+; RUN: opt < %s -passes=debugify,loop-vectorize -force-vector-interleave=1 -force-vector-width=4 -prefer-inloop-reductions -S | FileCheck %s -check-prefix DEBUGLOC
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ElvisWang123 wrote:

I think the new added `llvm/test/Transforms/LoopVectorize/RISCV/preserve-dbg-loc.ll` contains test case for `VPWidenIntrinsicRecipe` (vp.select).

It's hard to generate in-loop reduction (VPReductionRecipe) without  `-prefer-inloop-reductions`.

Perhaps rename this test case to `preserve-dbg-loc-reduction-inloop.ll`?

https://github.com/llvm/llvm-project/pull/120054