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ELF has support for sections that can be split into fixed size or null terminated entities. Since these sections can be split by the linker, it is not necessary to split them in codegen. This reduces the combined .o size in a llvm+clang build from 202,394,570 to 173,819,098 bytes. The time for linking clang with gold (on a VM, on a laptop) goes from 2.250089985 to 1.383001792 seconds. The flip side is the size of rodata in clang goes from 10,926,785 to 10,929,345 bytes. The increase seems to be because of http://sourceware.org/bugzilla/show_bug.cgi?id=17902. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227431 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.