r189218 - Simplify now that -O4 just maps to -O3 and -O is an alias of -O2.

[Joerg Sonnenberger]

On Mon, Aug 26, 2013 at 02:05:42PM -0000, Rafael Espindola wrote:
> Author: rafael
> Date: Mon Aug 26 09:05:41 2013
> New Revision: 189218
> 
> URL: http://llvm.org/viewvc/llvm-project?rev=189218&view=rev
> Log:
> Simplify now that -O4 just maps to -O3 and -O is an alias of -O2.

I find that a bit surprising, given that -O should mean -O1.
Daniel -- you changed it to mean -O2 in r82131. Any idea why?

Joerg