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Re: Unreviewed patch: Old loop optimizer clobbers frame pointer


On Sat, 18 Jun 2005, Ulrich Weigand wrote:
> http://gcc.gnu.org/ml/gcc-patches/2005-06/msg00157.html

This is OK for mainline.  I agree that the risks of moving modifications
to the frame pointer (especially in the presence of pseudos) outway the
potential performance benefits.  If we ever identify any cases where this
transformation is worthwhile, we can at that point investigate alternate
approaches, such as recording the dependency between all pseudos and
frame_pointer_rtx.  However, this fix seems preferable for now.

Roger
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