[PATCH] D54743: SROA: preserve alignment tags on loads and stores.

[Tim Northover via Phabricator via llvm-commits]

t.p.northover created this revision.
Herald added subscribers: kosarev, hiraditya, mcrosier.

When splitting up an alloca's uses we were dropping any explicit alignment tags on load and store instructions, which means they default to the ABI-required default alignment and this can cause miscompiles if the original value was smaller.

      

While I was there I decided to move the TBAA data into the base class too, since it was already shared.


Repository:
  rL LLVM

https://reviews.llvm.org/D54743

Files:
  llvm/lib/Transforms/Scalar/SROA.cpp
  llvm/test/Transforms/SROA/alignment.ll

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