[PATCH] D96399: [X86][CodeGenPrepare] Try to reuse IV's incremented value instead of adding the offset (WIP)

[Max Kazantsev via Phabricator via llvm-commits]

mkazantsev updated this revision to Diff 326035.
mkazantsev retitled this revision from "[X86][CodeGenPrepare] Try to reuse IV's incremented value instead of adding the offset" to "[X86][CodeGenPrepare] Try to reuse IV's incremented value instead of adding the offset (WIP)".
mkazantsev added a comment.

Moved the logic into AddrMode optimization code, so that GEP and non-GEP modes can use it separately. So it should resolve concerns 1 and 2.

As for potential functional bugs and TODO, need to think more. Placing (WIP) until resolved.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D96399/new/

https://reviews.llvm.org/D96399

Files:
  llvm/lib/CodeGen/CodeGenPrepare.cpp
  llvm/test/CodeGen/X86/2020_12_02_decrementing_loop.ll
  llvm/test/CodeGen/X86/usub_inc_iv.ll

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