[PATCH] D151098: [Clang][Docs] Add help test to `-march` and `-mcpu` to suggest `-mcpu=help`

Mon May 22 07:39:15 PDT 2023

jhuber6 added a comment.

In D151098#4360750 <https://reviews.llvm.org/D151098#4360750>, @aaron.ballman wrote:

> LGTM, though it's a bit jarring that `-march` suggests using `-mcpu=help` (should we ensure that `-march=help` works on all targets instead?)

Using `-march=help` works inadvertently because it will list the targets when given an invalid one. We could probably map the `-mcpu=help` handling to `-march=help` but I'm not entirely sure what the semantics should be there. The distinction between `-march` and `-mcpu` is still not entirely clear to me, it's just a matter of whether or not the target decided to choose one or the other.

Repository:
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https://reviews.llvm.org/D151098