[PATCH] D26242: Test for YMMRegisters.

[Zachary Turner via llvm-commits]

What does platform.processor() return? Is it possible to use that to detect
the existence of avx and just disable the test?
On Mon, Jan 8, 2018 at 8:36 AM Greg Clayton via Phabricator <
reviews at reviews.llvm.org> wrote:

> clayborg added a comment.
> Herald added a subscriber: llvm-commits.
>
> Detecting x86_64h might be tricky on different platforms. Two things I can
> think of: explicitly compile using x86_64h and when you try to run it it
> might fail. I believe that will work for Darwin, but not sure about other
> OSs (linux, Android). Mach-o has the x86_64h CPU type/subtyype, but I am
> not sure how ELF does this since they only really have the machine type and
> it isn't enough to represent x86_64h. The other way would be to start up
> the process (if it launches on all platforms) and look for a register by
> name that is only available if haswell support is available on the system.
> I believe all of our targets do correctly detect their AVX regs, so just
> stopping and looking for the register by name, and end the test as an
> expected failure or success if the register isn't available.
>
>
> Repository:
>   rL LLVM
>
> https://reviews.llvm.org/D26242
>
>
>
>
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