[PATCH] D71025: [LoopFusion] Restrict loop fusion to rotated loops.

[Kit Barton via Phabricator via llvm-commits]

kbarton created this revision.
kbarton added reviewers: jdoerfert, Meinersbur, dmgreen, etiotto, Whitney, fhahn, hfinkel.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.
Herald added a subscriber: ormris.

This patch restricts loop fusion to only consider rotated loops as valid candidates.
This simplifies the analysis and transformation and aligns with other loop optimizations.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D71025

Files:
  llvm/lib/Transforms/Scalar/LoopFuse.cpp
  llvm/test/Transforms/LoopFusion/cannot_fuse.ll
  llvm/test/Transforms/LoopFusion/diagnostics_missed.ll
  llvm/test/Transforms/LoopFusion/four_loops.ll
  llvm/test/Transforms/LoopFusion/loop_nest.ll
  llvm/test/Transforms/LoopFusion/simple.ll

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