[PATCH] D45284: [RISCV] More validations on the input value of -march=

[Alex Bradbury via Phabricator via cfe-commits]

asb added a comment.

Based on Andrew's response (thanks Kito for sending the query) it looks like GCC accepting lowercase only is intentional, and we should follow that. In which case, it might be an improvement to reject uppercase letters in the ISA string with a message saying that only lowercase letters are accepted.


https://reviews.llvm.org/D45284