mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-01-19 04:32:19 +00:00
24c79ab7cc
This has the nice property of compiling down to memcmp when feasible. An empty ArrayRef can have a nullptr in its Data field. I didn't find anything in the standard speaking against std::equal(nullptr, nullptr, nullptr) begin valid but MSVC asserts. The way libstdc++ lowers std::equal down to memcmp also makes invoking std::equal with a nullptr undefined behavior so checking is the only way to be safe. The extra check doesn't cost us perf either because we're essentially peeling the loop header away from the rotated loop. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230920 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.