Re: Increase precision of static profiles

[Tom de Vries <Tom_deVries at mentor dot com>]

On 11/17/2017 08:53 PM, Jan Hubicka wrote:
> Hi,
> this patch makes static profile to be in range 0...2^30 rather than
> 0...10000.  This is safe now as profile-counts are taking care of
> possible overflow when the profile ends up cummulating too high after
> inlining.
> MThere are two testcases that needs adusting. dump-2.c simply checks
> for specific value of counter that is now different. pr77445-2
> now gets one extra mismatch reported. The mismatch was present before
> too but due to low precision it was not visible.
>
> Bootstrapped/regtested x86_64-linux, comitted.
>
> Honza
>
> 	* predict.c (determine_unlikely_bbs): Set cgraph node count to 0
> 	when entry block was promoted unlikely.
> 	(estimate_bb_frequencies): Increase frequency scale.
> 	* profile-count.h (profile_count): Export precision info.
> 	* gcc.dg/tree-ssa/dump-2.c: Fixup template for profile precision
> 	changes.
> 	* gcc.dg/tree-ssa/pr77445-2.c: Fixup template for profile precision
> 	changes.

Hi,

this caused PR 83043 - "FAIL: libgomp.graphite/force-parallel-1.c 
scan-tree-dump-times graphite "2 loops carried no dependency" 1 (found 0 
times)" ( https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83043 ).

Thanks,
- Tom