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places based on it. Existing constant hoisting pass will merge a group of contants in a small range and hoist the const materialization code to the common dominator of their uses. However, if the uses are all in cold pathes, existing implementation may hoist the materialization code from cold pathes to a hot place. This may hurt performance. The patch introduces BFI to the pass and selects the best insertion places based on it. The change is controlled by an option consthoist-with-block-frequency which is off by default for now. Differential Revision: https://reviews.llvm.org/D28962 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300989 91177308-0d34-0410-b5e6-96231b3b80d8 |
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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.