[PATCH] D44189: [RISCV] Verify the input value of -march=

[Kito Cheng via Phabricator via cfe-commits]

kito-cheng updated this revision to Diff 139256.
kito-cheng added a comment.

Update revision according Alex's review.

Changes:

- Add testcase for uppercase of -march string.
- Add testcase for repeated letter in -march.
- Add more comment.
- Add several TODO item for diagnostic message improvement.
- Fix coding style issue.


Repository:
  rC Clang

https://reviews.llvm.org/D44189

Files:
  lib/Driver/ToolChains/Arch/RISCV.cpp
  test/Driver/riscv-arch.c

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