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762b38dd8c
clear out deleted loops from the current queue beyond just the current loop. This is important because SimpleLoopUnswitch will now enqueue the same loop to be re-processed. When it does this with the legacy PM, we don't have a way of canceling the rest of the pipeline and so we can end up deleting the loop before we reprocess it. =/ This change also makes it easy to support deleting other loops in the queue to process, although I don't have any use cases for that. Differential Revision: https://reviews.llvm.org/D48470 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@335317 91177308-0d34-0410-b5e6-96231b3b80d8
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