[LLVMdev] PassManager

[Reid Spencer]

Hi Devang,

On Tue, 2006-11-07 at 09:32 -0800, Devang Patel wrote:
> Hi All,
> 
> I am planning to re-implement PassManager in llvm 2.0. The goal is to  
> address
> 
>    http://nondot.org/sabre/LLVMNotes/Inliner-PassManager.txt   and
>    http://nondot.org/sabre/LLVMNotes/LoopOptimizerNotes.txt
> 
> and other crazy ideas Chris has. Current implementation of PassManager  
> is very complex. Initially I attempted to update it to  address above  
> notes but realized that redoing PassManager in simple way makes more  
> sense, and Chris agreed. Instead of replacing current PassManager with  
> new PassManager in one big scoop I'm going to follow these steps:
> 
> 1) Rename existing Managers using _X suffix.
> 2) Introduce new PassManager skeleton
> 3) Add functionality in new Pass Manager
> 4) Start Using new Pass Manager
> 5) Remove existing Pass Manager
> 6) Implement LoopPassManager
> 7) Update existing Loop transformations to conform LoopPassManager

Nice! What a welcome addition. It would be nice to have a PassManager
that I can actually understand :)

Reid.