jhuber6 wrote:

> What happens with `-march` not specified? I only know about gcc falling back 
> on `-march=x86-64`, but depends on the target triple.

Same thing that happens when you do `--target=x86_64-unknown-linux-gnu` without 
any `-march` option. For the GPU it defaults to like gfx700 or something, but 
that's not really our fault since the user never specified one.

https://github.com/llvm/llvm-project/pull/126655
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