[llvm] [MachinePipeliner] Fix fragile tests (PR #123169)

[via llvm-commits]

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+# RUN: llc -mtriple=hexagon -mcpu=hexagonv73 -O2 -mattr=+hvxv73,hvx-length64b \
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bcahoon wrote:

Does it make sense to create a mir version of this to test the pipeliner? I'm assuming that a regression would occur if this loop isn't pipelined.

https://github.com/llvm/llvm-project/pull/123169