Hi!
I'd like this patch (original version at the bottom) also to be
backported into 4.7.
Is it safe to backport?
On Fri, Aug 24, 2012 at 11:35 AM, Uros Bizjak <ubiz...@gmail.com> wrote:
> On Fri, Aug 24, 2012 at 9:22 AM, Igor Zamyatin <izamya...@gmail.com> wrote:
>
>> Following change enables look ahead feature in the code scheduler for
>> Atom processors. This gives quite reasonable gain for some benchmarks
>> for mobile market.
>>
>> Overall compile time increase for SPEC2000 is about 1%.
>>
>> Regtested for x86_64 and also bootstrapped with "--with-arch=core2
>> --with-cpu=atom"
>>
>> 2012-08-23 Yuri Rumyantsev <ysrum...@gmail.com>
>>
>> * config/i386/i386.c (ia32_multipass_dfa_lookahead) : Add
>> case for Atom processor.
>
> OK.
>
> Thanks,
> Uros.
Original patch:
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 976bbb4..331e29a 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -24103,6 +24103,7 @@ ia32_multipass_dfa_lookahead (void)
case PROCESSOR_CORE2_64:
case PROCESSOR_COREI7_32:
case PROCESSOR_COREI7_64:
+ case PROCESSOR_ATOM:
/* Generally, we want haifa-sched:max_issue() to look ahead as far
as many instructions can be executed on a cycle, i.e.,
issue_rate. I wonder why tuning for many CPUs does not do this. */
