[PATCH] D61576: [LoopInterchange] Fix handling of LCSSA nodes defined in headers and latches.

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.
fhahn added reviewers: efriedma, mcrosier, davide.
Herald added a subscriber: hiraditya.
Herald added a project: LLVM.

The code to preserve LCSSA PHIs currently only properly supports
reduction PHIs and PHIs for values defined outside the latches.

This patch improves the LCSSA PHI handling to cover PHIs for values
defined in the latches.

Fixes PR41725.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D61576

Files:
  llvm/lib/Transforms/Scalar/LoopInterchange.cpp
  llvm/test/Transforms/LoopInterchange/perserve-lcssa.ll

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D61576.198203.patch
Type: text/x-patch
Size: 9671 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20190505/905f1ab3/attachment.bin>