[PATCH] D16257: PM: Implement a basic loop pass manager

[Justin Bogner via llvm-commits]

Justin Bogner via llvm-commits <llvm-commits at lists.llvm.org> writes:
> bogner created this revision.
> bogner added a reviewer: chandlerc.
> bogner added a subscriber: llvm-commits.
> bogner set the repository for this revision to rL LLVM.
> Herald added a subscriber: joker.eph.
>
> This creates the new-style LoopPassManager and wires it up with dummy
> and print passes.
>
> TODO:
>   - Is a BasicBlock name sufficient for Loop::getName(), or should we
>     include the containing function's name as well?
>
>   - LoopAnalysisManagerFunctionProxy::run could use an assert to
>     ensure that we don't run Loop Analyses before the proxy is
>     created, but this can't work without a good model for invalidating
>     the cache between functions. Note: this is an existing issue with
>     FunctionAMModuleProxy as well.
>
>   - There is no LoopVerifierPass. This can be added later.

Here are POCs for the ports of loop rotate and loop unroll so you can
see how this is used or try it out if you like.

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