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Hi, First off, thanks Ezra for showing the way with BackgrounDrb. It''s a real godsend. I wanted to add a bit of job control to the system so that I could cancel DRB processes and so on. I thought I''d share how I did it in case anyone should find it useful or have feedback. I wanted to be able to put checkpoints into the drb job so that I could let the job do whatever needs to

Hi, I think these two patches are related to the topic: https://reviews.llvm.org/D41578 “[SCEV] Do not cache S -> V if S is not equivalent of V” * It’s committed. It can cause generation of redundant instructions. We’ve got regressions due to it. The biggest one is 7.31% regression in Spec2k6 401.bzip2 on Cortex-A57(AArch64). https://reviews.llvm.org/D42290 “[SCEV] Clear poison flags