GCC plugin that uses LLVM for optimization and code generation

 DragonEgg is a GCC plugin (dragonegg.so) that replaces GCC's optimizers
 and code generators with those from the LLVM project.
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 It is a reimplementation of llvm-gcc that works with gcc-4.6 or later.
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 DragonEgg is under heavy development and is not mature - it may crash or
 produce wrong code.