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GCC 12 (https://gcc.gnu.org/PR101696) allows `arch=x86-64` `arch=x86-64-v2` `arch=x86-64-v3` `arch=x86-64-v4` in the target_clones function attribute. This patch ports the feature. * Set KeyFeature to `x86-64{,-v2,-v3,-v4}` in `Processors[]`, to be used by X86TargetInfo::multiVersionSortPriority * builtins: change `__cpu_features2` to an array like libgcc. Define `FEATURE_X86_64_{BASELINE,V2,V3,V4}` and depended ISA feature bits. * CGBuiltin.cpp: update EmitX86CpuSupports to handle `arch=x86-64*`. Close https://github.com/llvm/llvm-project/issues/55830 Reviewed By: pengfei Differential Revision: https://reviews.llvm.org/D158329
Compiler-RT ================================ This directory and its subdirectories contain source code for the compiler support routines. Compiler-RT is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt. ================================