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WebAssembly is currently using labels to end scopes, so for example a loop scope looks like this: BB0_0: loop BB0_1 ... BB0_1: with BB0_0 being the label of the first block not in the loop. This requires that the label be printed even when it's only reachable via fallthrough. To arrange this, insert a no-op LOOP_END instruction in such cases at the end of the loop. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@253901 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.