[PATCH] D155843: [Analysis] Analysis of storing unchanged loaded value

Aleksei Romanov via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Thu Jul 20 07:25:20 PDT 2023

ara-sc created this revision.
ara-sc added reviewers: anton-afanasyev, asi-sc, RKSimon, nikic.
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Presumably patterns of the following kind could be optimized:

  %0 = load i8, ptr %c, align 1
  store i8 %0, ptr %a, align 1
  %1 = load i8, ptr %c, align 1
  store i8 %1, ptr %b, align 1

InstCombine is responsible for these optimization. Only this pass (InstCombinerImpl::visitLoadInst) uses llvm::FindAvailableLoadedValue to find previous available loads.
So we can add simple helper to get rid of the redundant code.

  rG LLVM Github Monorepo



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