On 01/31/14 22:52, Richard Biener wrote:
On February 1, 2014 12:56:45 AM GMT+01:00, Steven Bosscher
<stevenb....@gmail.com> wrote:
On Fri, Jan 31, 2014 at 10:28 PM, Jakub Jelinek wrote:
Without this patch, cprop can propagate e.g. a SYMBOL_REF to former
(mem (plus (reg) (const_int)))
making it invalid RTL (as plus of CONSTANT_P arguments must be
simplified
or surrounded by CONST).
But isn't this true for all non-unary operators? Is covering MINUS and
PLUS enough?
AND should be handled as well. I can't think of any others that might be used
with symbol refs. But yes, in principle you are right.
I think AND is necessary for certain variants of the Alpha. In theory a
shift-add might be possible here, but I don't know if it happens in
practice.
jeff
