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This is used to communicate that the instruction selection pipeline failed at some point. Another way to achieve that would be to have some kind of conditional scheduling in the PassManager, such that we only schedule a pass based on the success/failure of another one. The property approach has the advantage of being lightweight and solve the problem at stake. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@279885 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 are writing a package for LLVM, see docs/Packaging.rst for our suggestions.