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

[Guozhi Wei via Phabricator via llvm-commits]

Carrot updated this revision to Diff 500326.
Carrot added a comment.

To improve compile time, now I record the basic blocks contain dead load instructions, at the end of the same iteration, process these blocks again to delete load instructions. So we can avoid the extra iteration on the whole function.


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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