[PATCH] D89025: [RISCV] Add -mtune support

[Luís Marques via Phabricator via llvm-commits]

luismarques added a comment.

In D89025#2324334 <https://reviews.llvm.org/D89025#2324334>, @khchen wrote:

> RISCV supports `-mcpu` with default empty arch to align gcc's `-mtune` behavior since clang didn't support `-mtune` before. But now clang has `-mtune`, is it a good idea to remove those options? (ex. `rocket-rv32/rv64`, `sifive-7-rv32/64`)

If possible that would good, since -mcpu is deprecated (for e.g. x86_64) or unsupported in GCC (for e.g. RISC-V). So doing that would further align Clang with GCC. But I wonder if this might be too problematic, in terms of compatibility.


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https://reviews.llvm.org/D89025