[PATCH] D110043: [IR] Add helper to convert offset to GEP indices

[Nikita Popov via Phabricator via llvm-commits]

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We implement logic to convert a byte offset into a sequence of GEP indices for that offset in a number of places. This patch adds a `DataLayout::getIndicesForOffset()` method, which implements the core logic. I've updated SROA, ConstantFolding and InstCombine to use it, and there's a few more places where it looks relevant.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D110043

Files:
  llvm/include/llvm/IR/DataLayout.h
  llvm/lib/Analysis/ConstantFolding.cpp
  llvm/lib/IR/DataLayout.cpp
  llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
  llvm/lib/Transforms/Scalar/SROA.cpp
  llvm/test/Transforms/InstCombine/getelementptr.ll
  llvm/test/Transforms/SROA/scalable-vectors.ll

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