[patch, CSE] Bit-field insertion optimization

[Paolo Bonzini]

On 12/10/2010 10:46 AM, Andrew Stubbs wrote:
>
> Should the init-regs be moved before cse1 or cse2?

CSE1.

We definitely need to catch every opportunity to get rid of the 
initializations, so moving the pass earlier is nice.

> I'm happy to resubmit such a patch, but would it be applicable now, or
> would I have to wait for stage one?

Try running CSiBE or comparing a set of .i files.  If you see any case 
in which the change stands out as particularly beneficial, it may even 
be fine now.  Otherwise, including if there are size regressions, it 
should wait.

Paolo