[Lldb-commits] [PATCH] D41962: Fix TestYMMRegisters for older machines without AVX2

[Greg Clayton via llvm-commits]

Why not just look for the AVX registers by name that are only available if they are correctly detected by the native lldb-server or debugserver? Then we can avoid all of this. If we don't execute any instructions that crash the program, we can stop before any specialized AVX instructions are executed and kill the program is we don't see a register by name? 

> On Jan 12, 2018, at 8:44 AM, Jason Molenda via Phabricator via lldb-commits <lldb-commits at lists.llvm.org> wrote:
> 
> jasonmolenda added a comment.
> 
> I suppose a possible alternative would be to figure out the avx2 / avx512 features manually based on the cpuid instead of letting the compiler do it for us.  e.g. https://stackoverflow.com/questions/1666093/cpuid-implementations-in-c and then checking the bits as e.g. described in https://en.wikipedia.org/wiki/CPUID .  Bummer to do it so low level if we can delegate this to the compiler though.
> 
> 
> Repository:
>  rL LLVM
> 
> https://reviews.llvm.org/D41962
> 
> 
> 
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