[LLVMdev] Incoming API Changes

[Jim Grosbach]

Nice! This is been a long road to get to this point. Thanks for seeing it through.

-Jim

> On Aug 4, 2014, at 1:14 PM, Eric Christopher <echristo at gmail.com> wrote:
> 
> Hi All,
> 
> Just wanted to give some warning (especially now that 3.5 has
> branched) that some of the TargetMachine/TargetSubtargetInfo changes
> that I've been talking about are incoming here soon. I'll be
> submitting them as I get them done, but there's a lot of mechanical
> changes so it takes a bit - even using sed/refactoring tools. :)
> 
> Here's the current plan:
> 
> a) Removing TargetMachine->TargetSubtargetInfo scaffold
> - Now that all of the in-tree backends have been rewritten to support
> this I'm going to go ahead and remove the TargetMachine forwards so
> that I can...
> 
> b) Have getSubtarget/getSubtargetImpl take a Function/MachineFunction
>  - Next on the list, this will enable us to deal with using
> subtargets based on Function/MachineFunction attributes (target-cpu,
> target-features) - also caching of interfaces
> 
> c) Continue cleaning up uses etc. This will involve removing
> resetSubtargetFeatures shortly after b and the mips instruction
> selection pass. Also things like caching the subtarget rather than the
> target in places that it seems to make sense (SelectionDAG for
> example).
> 
> If there are any problems yell as soon as you see them and I'll
> happily work with everyone to get it fixed.
> 
> Thanks!
> 
> -eric
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