[PATCH] D141712: [GVN] Improve PRE on load instructions

[Guozhi Wei via Phabricator via llvm-commits]

Carrot updated this revision to Diff 494499.
Carrot added a comment.
Herald added a subscriber: ormris.

Check for implicit control flow instruction in function findLoadToHoistIntoPred, so we can avoid moving load across unexpected control flow.

@reames and @hans please try to see if this patch works for your code.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D141712/new/

https://reviews.llvm.org/D141712

Files:
  llvm/include/llvm/Transforms/Scalar/GVN.h
  llvm/lib/Transforms/Scalar/GVN.cpp
  llvm/test/Transforms/GVN/PRE/2011-06-01-NonLocalMemdepMiscompile.ll
  llvm/test/Transforms/GVN/PRE/2017-06-28-pre-load-dbgloc.ll
  llvm/test/Transforms/GVN/PRE/2018-06-08-pre-load-dbgloc-no-null-opt.ll
  llvm/test/Transforms/GVN/PRE/pre-load-dbg.ll
  llvm/test/Transforms/GVN/PRE/pre-load.ll
  llvm/test/Transforms/GVN/PRE/volatile.ll
  llvm/test/Transforms/GVN/condprop.ll

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