[LLVMdev] Compiler Driver Decisions

[Misha Brukman]

On Wed, Aug 04, 2004 at 12:37:39PM -0700, Reid Spencer wrote:
> On Wed, 2004-08-04 at 12:23, Misha Brukman wrote:
> > On Wed, Aug 04, 2004 at 12:16:12PM -0700, Reid Spencer wrote:
> > > So I propose:
> > >
> > [snip]
> > > -O3 = aggressive optimization, regardless of computation time with
> > > the effect of producing the fastest executable
> > 
> > I would suggest splitting -O3 into 2 or more levels of optimization,
> > because as written, -O3 sounds pretty scary: "regardless of
> > computation time", and given some people who thing that several
> > minutes of compile time is acceptable, I think it's useful to split
> > it into "aggresive opt", "aggresive interprocedural opt", and
> > "aggressive interprocedural analysis with interprocedural opt".
> 
> Okay, sounds good. How about:
> 
> -O3agg -O3ipo -O3aggipo
> 
> :) ?

I was thinking more like -O3, -O4, -O5, and the "super-duper run-time
life-long optimization" is -O6 :)

-- 
Misha Brukman :: http://misha.brukman.net :: http://llvm.cs.uiuc.edu