d3a33a16bb
This change includes a fix for https://code.google.com/p/chromium/issues/detail?id=499508#c3, which required updating the visibility for symbols with eliminated definitions. --Original Commit Message-- Add new EliminateAvailableExternally module pass, which is performed in O2 compiles just before GlobalDCE, unless we are preparing for LTO. This pass eliminates available externally globals (turning them into declarations), regardless of whether they are dead/unreferenced, since we are guaranteed to have a copy available elsewhere at link time. This enables additional opportunities for GlobalDCE. If we are preparing for LTO (e.g. a -flto -c compile), the pass is not included as we want to preserve available externally functions for possible link time inlining. The FE indicates whether we are doing an -flto compile via the new PrepareForLTO flag on the PassManagerBuilder. llvm-svn: 241466 |
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| tools | ||
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| .clang-format | ||
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| CODE_OWNERS.TXT | ||
| CREDITS.TXT | ||
| LICENSE.TXT | ||
| LLVMBuild.txt | ||
| Makefile | ||
| Makefile.common | ||
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| README.txt | ||
| configure | ||
| llvm.spec.in | ||
README.txt
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.