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It can happen (by line CurSU->isPending = true; // This SU is not in AvailableQueue right now.) that a SUnit is mark as available but is not in the AvailableQueue. For SUnit being selected for scheduling both conditions must be met. This patch mainly defensively protects from invalid removing a node from a queue. Sometimes nodes are marked isAvailable but are not in the queue because they have been defered due to some hazard. Patch by Pawel Bylica! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233351 91177308-0d34-0410-b5e6-96231b3b80d8
Low Level Virtual Machine (LLVM) ================================ This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments. LLVM is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt. Please see the documentation provided in docs/ for further assistance with LLVM, and in particular docs/GettingStarted.rst for getting started with LLVM and docs/README.txt for an overview of LLVM's documentation setup. If you're writing a package for LLVM, see docs/Packaging.rst for our suggestions.