[PATCH] D146622: (WIP)[AggressiveInstCombine] folding load for constant global patterened arrays and structs by GEP indices

[Kohei Asano via Phabricator via llvm-commits]

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Fold loadInst for constant aggregate types, those load results are equivalent for the given alignments.

This revision will be part 2 of the following stages.

1. alignment-based
2. GEP-based (This revision will be)

alive proofs: https://alive2.llvm.org/ce/z/qRb26K(WIP)
Depends on: https://reviews.llvm.org/D145355, https://reviews.llvm.org/D144445
Fixes: https://github.com/rust-lang/rust/issues/107208


https://reviews.llvm.org/D146622

Files:
  llvm/lib/Transforms/AggressiveInstCombine/AggressiveInstCombine.cpp
  llvm/test/Transforms/AggressiveInstCombine/patterned-load.ll

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