[cfe-dev] [llvm-dev] RFC: First-class Matrix type

[JF Bastien via cfe-dev]

> On Oct 12, 2018, at 10:36 AM, David Greene via cfe-dev <cfe-dev at lists.llvm.org> wrote:
> 
> Adam Nemet via llvm-dev <llvm-dev at lists.llvm.org> writes:
> 
>>    Is this something that we could get if we had better loop
>>    transformations (i.e., loop fusion)?
>> 
>> As we both know, aliasing usually makes this pretty difficult. For
>> relatively small matrices run-time memchecks can be costly. Also we
>> need to be able to evaluate these fusion opportunities in the inliner
>> so having first-class type representation makes this cheap.
> 
> Fortran defines away many of these problems.  Would better local
> restrict support help with C-family languages?  There are several old
> patches from Hal that need some attention.

Agreed these patches would be neat to revive. I think we’d also want someone to pursue wg21.link/n4150 <http://wg21.link/n4150>.
However, none of that seems like it should gate matrix support in the IR.
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