PATCH [6/n]: Prepare x32: PR rtl-optimization/47449: Don't propagate hard register non-local goto save area

Alan Modra
Tue Jul 5 01:35:00 GMT 2011

On Mon, Jul 04, 2011 at 05:09:28PM -0700, H.J. Lu wrote:
> On Mon, Jul 4, 2011 at 4:54 PM, Alan Modra <> wrote:
> > I didn't set out to do anything special with hard regs one way or the
> > other, just extended what was already done for paradoxical subregs to
> > sign and zero extended subregs.
> Does your change depend on processing zero/sign-extended
> hard registers?

At the time I wrote the patch I was more interested in pseudos.  I
expect that powerpc64 won't be greatly affected if hard regs were
excluded from this fwprop optimization, but you need to discuss your
patch with maintainers of this code.  My opinion as a one-time
contributor to fwprop doesn't count for much.

Alan Modra
Australia Development Lab, IBM

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