From: Cesar Philippidis <cesar_philippidis@mentor.com>
To: Jakub Jelinek <jakub@redhat.com>,
Thomas Schwinge <thomas@codesourcery.com>
Cc: <gcc-patches@gcc.gnu.org>
Subject: Re: Re: OpenACC middle end changes
Date: Thu, 13 Nov 2014 19:09:00 -0000 [thread overview]
Message-ID: <54650093.1070109@mentor.com> (raw)
In-Reply-To: <20141113180949.GX5026@tucnak.redhat.com>
I'll try to respond to the reduction stuff. It's been a while since I
started working on it, so I may have lost some state.
On 11/13/2014 10:09 AM, Jakub Jelinek wrote:
>> @@ -233,6 +242,90 @@ static tree scan_omp_1_op (tree *, int *, void *);
>> *handled_ops_p = false; \
>> break;
>>
>> +/* Helper function to get the reduction array name */
>> +static const char *
>> +omp_get_id (tree node)
>
> Be more specific in the function name what it is for?
It's the name of the array containing the partial reductions for
original reduction variable.
>> +{
>> + const char *id = IDENTIFIER_POINTER (DECL_NAME (node));
>> + int len = strlen ("omp$") + strlen (id);
>> + char *temp_name = (char *)alloca (len+1);
>> + snprintf (temp_name, len+1, "gfc$%s", id);
>
> gfc$ ?
It's just a semi-random prefix I used to make the partial reduction
array identifier unique to aid with debugging. I was working on the
fortran front end at the time. Maybe s/gfc/oacc/?
> Use
> char *temp_name = XALLOCAVEC (char, len + 1);
> instead?
>
>> + return IDENTIFIER_POINTER(get_identifier (temp_name));
>
> Formatting (missing space before ( ).
>
>> @@ -868,6 +981,25 @@ maybe_lookup_field (tree var, omp_context *ctx)
>> return n ? (tree) n->value : NULL_TREE;
>> }
>>
>> +static inline tree
>> +lookup_reduction (const char *id, omp_context *ctx)
>
> Can't you use oacc_ in the name of OpenACC specific functions?
Sure.
[snip]
>> @@ -8834,6 +9492,397 @@ make_pass_expand_omp (gcc::context *ctxt)
>>
>> /* Routines to lower OpenMP directives into OMP-GIMPLE. */
>>
>> +/* Helper function to preform, potentially COMPLEX_TYPE, operation and
>> + convert it to gimple. */
>> +static void
>> +omp_gimple_assign_with_ops (tree_code op, tree dest, tree src, gimple_seq *seq)
>
> Makes me wonder why don't you put the reduction code earlier into reduction
> clause GENERIC and then lower into clauses' GIMPLE seq.
> If there is some reason, please name it oacc at least.
I probably was trying to reuse as much of the existing code as possible.
I've swapped out too much state on this. This can be renamed too.
>> +static void
>> +initialize_reduction_data (tree clauses, tree nthreads, gimple_seq *stmt_seqp,
>> + omp_context *ctx)
>
> Likewise.
>
>> +/* Helper function to process the array of partial reductions. Nthreads
>> + indicates the number of threads. Unfortunately, GOACC_GET_NUM_THREADS
>> + cannot be used here, because nthreads on the host may be different than
>> + on the accelerator. */
>> +
>> +static void
>> +finalize_reduction_data (tree clauses, tree nthreads, gimple_seq *stmt_seqp,
>> + omp_context *ctx)
>
> Likewise.
>
>> +/* Scan through all of the gimple stmts searching for an OMP_FOR_EXPR, and
>> + scan that for reductions. */
>> +
>> +static void
>> +process_reduction_data (gimple_seq *body, gimple_seq *in_stmt_seqp,
>> + gimple_seq *out_stmt_seqp, omp_context *ctx)
>
> Likewise.
Thomas, would you like me to handle the renaming, or will you? I could
make those changes to gomp-4_0-branch if you like.
Cesar
next prev parent reply other threads:[~2014-11-13 19:03 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-13 17:04 Thomas Schwinge
2014-11-13 18:31 ` Jakub Jelinek
2014-11-13 19:09 ` Cesar Philippidis [this message]
2014-11-13 19:16 ` Jakub Jelinek
2014-11-14 1:27 ` Cesar Philippidis
2014-12-18 11:07 ` Thomas Schwinge
2014-12-18 11:39 ` Jakub Jelinek
2014-12-18 13:17 ` Thomas Schwinge
2014-12-18 11:17 ` Thomas Schwinge
2014-12-18 11:39 ` Jakub Jelinek
2014-12-18 12:11 ` Jakub Jelinek
2014-12-18 12:24 ` Jakub Jelinek
2014-12-18 12:31 ` Thomas Schwinge
2014-12-18 12:36 ` Jakub Jelinek
2014-12-18 13:12 ` Jakub Jelinek
2014-12-18 13:24 ` Thomas Schwinge
2015-02-13 16:23 ` Thomas Schwinge
2014-12-18 14:29 ` Jakub Jelinek
2014-12-18 15:10 ` libgomp offloading testing (was: OpenACC middle end changes) Thomas Schwinge
2014-12-18 16:31 ` OpenACC middle end changes Thomas Schwinge
2015-07-09 15:52 ` Merge DEF_GOACC_BUILTIN into DEF_GOMP_BUILTIN? (was: OpenACC middle end changes) Thomas Schwinge
2015-07-09 15:58 ` Jakub Jelinek
2014-11-13 22:15 ` OpenACC middle end changes Joseph Myers
2014-11-14 10:35 ` Richard Biener
2014-11-14 10:37 ` Jakub Jelinek
2014-11-16 1:46 ` Gerald Pfeifer
2014-11-19 3:02 ` Bernd Schmidt
2014-11-19 19:32 ` Bernd Schmidt
2014-11-19 20:07 ` Bernd Schmidt
2014-11-19 22:20 ` Jakub Jelinek
2015-02-20 9:48 ` Jakub Jelinek
2015-02-20 11:49 ` nvptx offloading: Tag entrypoint functions with a special attribute (was: OpenACC middle end changes) Thomas Schwinge
2014-11-20 3:25 ` OpenACC middle end changes Bernd Schmidt
2014-11-20 8:07 ` Jakub Jelinek
2014-11-20 13:15 ` Bernd Schmidt
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