llvm-project

941eab10 - [RISCV] Make parseNormalizedArchString only accept [a-z0-9_]. (#90815)

[RISCV] Make parseNormalizedArchString only accept [a-z0-9_]. (#90815) Previously we only rejected upper case characters. We should instead reject anything except lower case, numbers, and underscore. Other characters will likely confuse the extension sorting.