[Patch, i386] Turn on -fschedule-insns and -fsched-pressure by default for x86-64

[Jan Hubicka]

> On 12/07/2010 08:55 PM, Jack Howarth wrote:
>>     I noticed that the manpage claims this option can degrade debugging on some targets.
>> Which debug formats suffer from this problem and wouldn't we want to avoid enabling
>> -frename-registers on those targets for -O2, -O3 and -Os?
>
> I think it is false since -fvariable-tracking was committed (3.4 maybe?)

Yes, variable-tracking was introduced to solve this problem.  The manpage
probably reffers to non-dwarf2 formats (only dwarf2out use location notes) that
are much less of concern now than back then.
>
> Paolo