PATCH [1/n] addr32: Properly use Pmode and word_mode

[H.J. Lu]

On Sat, Nov 12, 2011 at 9:32 AM, Uros Bizjak <ubizjak@gmail.com> wrote:
> On Sat, Nov 12, 2011 at 3:19 AM, H.J. Lu <hongjiu.lu@intel.com> wrote:
>
>> The current x32 implementation uses LEAs to convert 32bit address to
>> 64bit.  However, we can use addr32 prefix to use 32bit address directly.
>> It improves performance by 5% in SPEC CPU 2K/2006.  All changes are done
>> in x86 backend, except for a smaill unwind library assert change:
>>
>> http://gcc.gnu.org/ml/gcc-patches/2011-11/msg01555.html
>>
>> due to return column size difference.
>>
>> For x86-64, Pmode can be 32bit or 64bit, but word_mode is always 64bit.
>> push/pop only work on word_mode.  Also string instructions take Pmode
>> pointers.
>>
>> I will submit a set of patches to use 32bit Pmode for x32.  This is
>> the first patch to properly use Pmode and word_mode.  It also adds
>> addr32 prefix to string instructions if needed.  OK for trunk?
>
> Not for stage3.
>
> Uros.


Now trunk in stage1.  The patch is at

http://gcc.gnu.org/ml/gcc-patches/2011-11/msg01572.html

OK for trunk?

Thanks.

-- 
H.J.