[LLVMdev] RFC: Pass Manager Redux

[Andrew Trick]

On Jul 21, 2012, at 5:25 PM, Chris Lattner <clattner at apple.com> wrote:
> 2. It would be great to get conditionally invalidated analysis passes.  For example, if you run something like "dominators, loop unswitch, dominators", and loop unswitch doesn't *actually* change anything, then the second run of dominators shouldn't do anything.  In fact, we shouldn't have two instantiations of the dominator pass in the first place.


A slightly related implementation detail is that I find it useful to be able to register and configure passes without instantiating them by using the static ID only. I was never sure whether we were moving toward char& or void* IDs.

-Andy
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