[PATCH] D132553: [instcombine] Test for zero initialisation optimisation of integer product

[Zain Jaffal via Phabricator via llvm-commits]

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Following the work on `D131672` we do the same optimisations for integer products.
We add tests to check if a loop gets removed if we repeatdly multiply an array elements with an accumulator initalised to zero


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D132553

Files:
  llvm/test/Transforms/InstCombine/remove-loop-phi-fastmul.ll

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