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Re: [PATCH] Add some statistics counting to SRA


2009/6/18 Martin Jambor <mjambor@suse.cz>:
> Hi,
>
> On Thu, Jun 18, 2009 at 04:25:53PM +0200, Richard Guenther wrote:
>> On Thu, 18 Jun 2009, Martin Jambor wrote:
>>
>> > Hi,
>> >
>> > the ?patch below adds ?some simple ?statistics to ?intraprocedural SRA
>> > that I ?thought might ?be useful (and ?that I ?use to help ?me analyze
>> > differences ?in memory ?consumption and ?compile time ?that ?can cause
>> > concern).
>> >
>> > Bootstrapped and tested on x86_64-linux. ?OK for trunk?
>> >
>> > Thanks,
>> >
>> > Martin
>> >
>> >
>> > 2009-06-17 ?Martin Jambor ?<mjambor@suse.cz>
>> >
>> > ? ? * tree-sra.c: Include statistics.h
>> > ? ? (sra_stats): New variable.
>> > ? ? (sra_initialize): Clear sra_stats.
>> > ? ? (create_access_replacement): Increment sra_stats.replacements.
>> > ? ? (get_access_replacement): Do not return twice.
>> > ? ? (analyze_all_variable_accesses): Increment statistics counter by the
>> > ? ? number of scalarized aggregates.
>> > ? ? (generate_subtree_copies): Increment sra_stats.subtree_copies.
>> > ? ? (sra_modify_expr): Increment sra_stats.exprs.
>> > ? ? (load_assign_lhs_subreplacements): Increment sra_stats.subreplacements.
>> > ? ? (sra_modify_assign): Increment sra_stats.exprs,
>> > ? ? sra_stats.separate_lhs_rhs_handling and sra_stats.deleted.
>> > ? ? (perform_intra_sra): Update statistics counters.
>> > ? ? * Makefile.in (tree-sra.o): Add statistics.h to dependencies.
>>

> This function is run at most once per function (well, actually once in
> early SRA ?and once for "late" SRA). ? So I thought I ?would not store
> the count just to read it back as it is. ?But if you think it's ugly I
> can do it, I don't have any strong feelings about this.
>

This caused:

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40491


-- 
H.J.


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