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Summary: On x86-64 with clang 3.8, before: mov edx, 1 mov cl, dil shl rdx, cl cmp rdi, 64 mov rax, -1 cmovne rax, rdx ret after: mov ecx, 64 sub ecx, edi mov rax, -1 shr rax, cl ret Reviewers: rnk Subscribers: dylanmckay, mkuper, llvm-commits Differential Revision: https://reviews.llvm.org/D22440 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@275718 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.