[PowerPC] PR23774 stack backchain broken saga

[Richard Henderson]

On Sat, Sep 10, 2005 at 12:57:49PM +0930, Alan Modra wrote:
> Also stack deallocation when finished with alloca memory.

Ah.

> For some reason 4.0/4.1 doesn't combine this deallocation with
> stack adjustment in the epilogue, a regression from 3.4.

Yeah, I've been meaning to write a pass that goes through and figures
out when the deallocations can be removed.  I keep forgetting.


r~