[PATCH] D124119: [AArch64] Combine instructions of type or/and where AND masks can be combined.

[Biplob Mishra via Phabricator via llvm-commits]

bipmis created this revision.
bipmis added reviewers: spatel, RKSimon, dmgreen.
bipmis added projects: LLVM, All.
bipmis requested review of this revision.

The patch simplifies some of the patterns as below

(A | (B & C0)) | (B & C1 <https://reviews.llvm.org/C1>) -> A | (B & C1 <https://reviews.llvm.org/C1>|C2)
((B & C0) | A) | (B & C1 <https://reviews.llvm.org/C1>) -> (B & C1 <https://reviews.llvm.org/C1>|C2) | A

In some scenarios like byte reverse on half word, we can see this pattern multiple times and this conversion can optimize these patterns.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D124119

Files:
  llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
  llvm/test/Transforms/InstCombine/and-or.ll
  llvm/test/Transforms/InstCombine/or.ll

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D124119.424000.patch
Type: text/x-patch
Size: 4385 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20220420/99424070/attachment.bin>