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A comment on LLVM patch to fix half of Spectre attack. Parent comment

Re:LLVM patch to fix half of Spectre attack by lower on Thursday January 04, 2018 @02:08PM (#16073100)
Something like this exists with function multi-versioning: https://lwn.net/Articles/691932/

For example, glibc chooses optimised machine code for memcpy depending on the CPU it runs on.

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