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LLVM IR is not machine independent, and is documented specifically as not designed to enable portable IR.



PNaCl's LLVM IR is machine independent and can be used standalone without Chrome.


While true in a narrow sense, it does so by targeting the lowest common practical denominator—in practice, a chip that looks a lot like a 386 or 32-bit ARM with no SIMD pipeline. That puts it as little more than a better GNU Lightning.





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