llvm-project

c9e71400 - [AArch64][clang] Improve -mcpu= and -mtune= error messages too (#197640)

[AArch64][clang] Improve -mcpu= and -mtune= error messages too (#197640) Similar to my previous change improving the error message for `-march=` in #197441, this changes `-mcpu=` and `-mtune=` arguments to only report the first invalid feature flag, rather than the entire string. This is a much clearer error message for the user.