24194090e1
This is an alternative of D157485 and a pre-feature to support AVX10. AVX10 Architecture Specification: https://cdrdv2.intel.com/v1/dl/getContent/784267 AVX10 Technical Paper: https://cdrdv2.intel.com/v1/dl/getContent/784343 RFC: https://discourse.llvm.org/t/rfc-design-for-avx10-feature-support/72661 Based on the feedbacks from LLVM and GCC community, we have agreed to start from supporting `-m[no-]evex512` on existing AVX512 features. The option `-mno-evex512` can be used with `-mavx512xxx` to build binaries that can run on both legacy AVX512 targets and AVX10-256. There're still arguments about what's the expected behavior when this option as well as `-mavx512xxx` used together with `-mavx10.1-256`. We decided to defer the support of `-mavx10.1` after we made consensus. Or furthermore, we start from supporting AVX10.2 and not providing any AVX10.1 options. Reviewed By: RKSimon, skan Differential Revision: https://reviews.llvm.org/D159250