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openacc: GOMP_MAP_ATTACH handling in find_group_last

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Arrange for GOMP_MAP_ATTACH to be grouped together with a preceding
GOMP_MAP_TO_PSET or other "to" data movement clause, except in cases
where an explicit "attach" clause is used.

2020-07-09  Julian Brown  <julian@codesourcery.com>

include/
	* gomp-constants.h (gomp_map_kind): Update comment for GOMP_MAP_TO_PSET.

libgomp/
	* oacc-mem.c (find_group_last): Group data-movement clauses
	(GOMP_MAP_TO_PSET, GOMP_MAP_TO, etc.) together with a subsequent
	GOMP_MAP_ATTACH.  Allow standalone GOMP_MAP_ATTACH also.
This commit is contained in:
Julian Brown 2020-06-11 06:43:59 -07:00
parent ac8996edb1
commit 8d2e5026d2
2 changed files with 23 additions and 4 deletions
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5
include/gomp-constants.h
View File

@ -65,7 +65,10 @@ enum gomp_map_kind
/* Also internal, behaves like GOMP_MAP_TO, but additionally any
GOMP_MAP_POINTER records consecutive after it which have addresses
falling into that range will not be ignored if GOMP_MAP_TO_PSET wasn't
mapped already. */
mapped already.
For OpenACC attach operations (e.g. copyin of struct members),
GOMP_MAP_TO_PSET is followed by a single GOMP_MAP_ATTACH mapping
instead. */
GOMP_MAP_TO_PSET = (GOMP_MAP_FLAG_SPECIAL_0 | 1),
/* Must already be present. */
GOMP_MAP_FORCE_PRESENT = (GOMP_MAP_FLAG_SPECIAL_0 | 2),

22
libgomp/oacc-mem.c
View File

@ -985,9 +985,15 @@ find_group_last (int pos, size_t mapnum, size_t *sizes, unsigned short *kinds)
switch (kind0)
{
case GOMP_MAP_TO_PSET:
while (pos + 1 < mapnum && (kinds[pos + 1] & 0xff) == GOMP_MAP_POINTER)
if (pos + 1 < mapnum
&& (kinds[pos + 1] & 0xff) == GOMP_MAP_ATTACH)
return pos + 1;
while (pos + 1 < mapnum
&& (kinds[pos + 1] & 0xff) == GOMP_MAP_POINTER)
pos++;
/* We expect at least one GOMP_MAP_POINTER after a GOMP_MAP_TO_PSET. */
/* We expect at least one GOMP_MAP_POINTER (if not a single
GOMP_MAP_ATTACH) after a GOMP_MAP_TO_PSET. */
assert (pos > first_pos);
break;
@ -1002,6 +1008,9 @@ find_group_last (int pos, size_t mapnum, size_t *sizes, unsigned short *kinds)
gomp_fatal ("unexpected mapping");
break;
case GOMP_MAP_ATTACH:
break;
default:
/* GOMP_MAP_ALWAYS_POINTER can only appear directly after some other
mapping. */
@ -1012,9 +1021,16 @@ find_group_last (int pos, size_t mapnum, size_t *sizes, unsigned short *kinds)
return pos + 1;
}
/* We can have a single GOMP_MAP_ATTACH mapping after a to/from
mapping. */
if (pos + 1 < mapnum
&& (kinds[pos + 1] & 0xff) == GOMP_MAP_ATTACH)
return pos + 1;
/* We can have zero or more GOMP_MAP_POINTER mappings after a to/from
(etc.) mapping. */
while (pos + 1 < mapnum && (kinds[pos + 1] & 0xff) == GOMP_MAP_POINTER)
while (pos + 1 < mapnum
&& (kinds[pos + 1] & 0xff) == GOMP_MAP_POINTER)
pos++;
}