[PATCH] Disable passes on optnone functions

[Robinson, Paul]

Ping. Somebody willing to own MachineFunctionPass behavior?
--paulr

> -----Original Message-----
> From: llvm-commits-bounces at cs.uiuc.edu [mailto:llvm-commits-
> bounces at cs.uiuc.edu] On Behalf Of Robinson, Paul
> Sent: Monday, March 03, 2014 6:25 PM
> To: Nick Lewycky
> Cc: llvm-commits at cs.uiuc.edu
> Subject: RE: [PATCH] Disable passes on optnone functions
> 
> > -----Original Message-----
> > From: Nick Lewycky [mailto:nicholas at mxc.ca]
> > Sent: Saturday, March 01, 2014 1:17 AM
> > To: Robinson, Paul
> > Cc: llvm-commits at cs.uiuc.edu
> > Subject: Re: [PATCH] Disable passes on optnone functions
> >
> > Robinson, Paul wrote:
> > > This patch disables a number of Machine Function Passes for
> functions
> > > with the 'optnone' attribute.
> > >
> > > To come up with the list of passes, I looked at CodeGen/Passes.cpp,
> > > and disabled whatever would be excluded under CodeGenOpt::None.
> > > Except, I did not disable anything listed in addOptimizedRegAlloc(),
> > > as I can't see how to substitute one RA pass sequence for another on
> > > a per-function basis.  Maybe there's a way to deal with that safely,
> > > but for now it seemed prudent (and not horribly harmful to the goals
> > > of 'optnone') to leave well enough alone.
> > > If anybody has an idea, we're open to it.
> >
> > I note that I'm on the 'to' line, but I am certainly not the right
> > person to review this. I know some high-level design of the codegen
> > parts, but that's about it.
> 
> Ah, sorry.  You were there for me on the {Function|BasicBlock|Loop}Pass
> part, I shouldn't have presumed about MachineFunctionPass.
> 
> >
> > Would someone else please take a look?
> >
> > Nick
> 
> --paulr
> 
> 
> 
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