[all-commits] [llvm/llvm-project] 5e855f: [MemCpyOpt] Don't hoist store that's not guarantee...

[Nikita Popov via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 5e855f1e8056ca0800134469ee82e0ff5ad5af59
      https://github.com/llvm/llvm-project/commit/5e855f1e8056ca0800134469ee82e0ff5ad5af59
  Author: Nikita Popov <nikita.ppv at gmail.com>
  Date:   2020-10-10 (Sat, 10 Oct 2020)

  Changed paths:
    M llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp
    M llvm/test/Transforms/MemCpyOpt/fca2memcpy.ll

  Log Message:
  -----------
  [MemCpyOpt] Don't hoist store that's not guaranteed to execute

MemCpyOpt can hoist stores while load+store pairs into memcpy.
This hoisting can currently result in stores being executed that
weren't guaranteed to execute in the original problem.

Differential Revision: https://reviews.llvm.org/D89154