On Wed, Apr 20, 2011 at 9:09 AM, Jakub Jelinek ja...@redhat.com wrote:
Hi!
This splitter allows us to optimize (x {* {2,4,8}, {1,2,3}}) {|,^} y
for constant integer y = {1ULL,3ULL,7ULL} using lea{l,q} (| or ^ in
that case, when the low bits are known to be all 0, is like plus).
On Wed, Apr 20, 2011 at 10:27:36AM -0700, Richard Henderson wrote:
On 04/20/2011 09:09 AM, Jakub Jelinek wrote:
Hi!
This splitter allows us to optimize (x {* {2,4,8}, {1,2,3}}) {|,^} y
for constant integer y = {1ULL,3ULL,7ULL} using lea{l,q} (| or ^ in
that case, when the low bits are
Hi!
This splitter allows us to optimize (x {* {2,4,8}, {1,2,3}}) {|,^} y
for constant integer y = {1ULL,3ULL,7ULL} using lea{l,q} (| or ^ in
that case, when the low bits are known to be all 0, is like plus).
Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?
2011-04-20 Jakub
