[tree-ssa] copy prop vs. debugging

[Richard Henderson]

On Thu, Jul 03, 2003 at 11:16:35AM -0400, Jason Merrill wrote:
> 1) When coalescing, try to replace temps with user variables which are
>    copied from them.  This is an incomplete solution, but might be simpler
>    than:

That's certainly a start.

> 2) Remember the dead copies, make a list of which temporary holds the value
>    of a variable at any given time, and feed this list to the debugging
>    backend.

This actually sounds something like the partial support we have
for location lists at the rtl level.

> Thoughts?  Is there any live range splitting code in gcc these days?

Not as such, but I guess it depends on what you mean by that.


r~