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The instruction set first appeared with Westmere, but not all processors in that and the next few generations have the instructions. According to Wikipedia[1], the first generation in which all SKUs have AES instructions are Skylake and Goldmont. I can't find any Skylake, Kabylake, Kabylake-R or Cannon Lake currently listed at https://ark.intel.com that says "Intel® AES New Instructions" "No". This matches GCC commit https://gcc.gnu.org/ml/gcc-patches/2018-08/msg01940.html [1] https://en.wikipedia.org/wiki/AES_instruction_set Patch By: thiagomacieira Differential Revision: https://reviews.llvm.org/D51510 llvm-svn: 341862