Sure. I've just attached it to the bug.
On 2011/8/24 14:56, Xinliang David Li wrote:
Thanks.
Can you make the test case a standalone preprocessed file (using -E)?
David
On Wed, Aug 24, 2011 at 2:26 PM, Oleg Smolsky<oleg.smol...@riverbed.com> wrote:
On 2011/8/24 13:02, Xinliang David Li wrote:
On 2011/8/23 11:38, Xinliang David Li wrote:
Partial register stall happens when there is a 32bit register read
followed by a partial register write. In your case, the stall probably
happens in the next iteration when 'add eax, 0Ah' executes, so your
manual patch does not work. Try change
add al, [dx] into two instructions (assuming esi is available here)
movzx esi, ds:data8[dx]
add eax, esi
I patched the code to use "movzx edi" but the result is a little clumsy
as
the loop is based on the virtual address rather than index.
my bad -- I did copy& paste without making it precise.
No worries. The fragment did fit into the padding :)
So, this is one test out of the suite. Many of them degraded... Are you
guys
interested in looking at other ones? Or is there something to be fixed in
the register allocation logic?
File bugs --- the isolated examples like this one would be very helpful in
the bug report.
Done:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50182
Regards,
Oleg.
