0ab29cf0bb
This patch implements several C++ specific mapping capabilities introduced for
OpenMP 5.0, including implicit mapping of this[:1] for non-static member
functions, zero-length array section mapping of pointer-typed members,
lambda captured variable access in target regions, and use of lambda objects
inside target regions.
Several adjustments to the C/C++ front-ends to allow more member-access syntax
as valid is also included.
PR middle-end/92120
gcc/cp/ChangeLog:
* cp-tree.h (finish_omp_target): New declaration.
(finish_omp_target_clauses): Likewise.
* parser.c (cp_parser_omp_clause_map): Adjust call to
cp_parser_omp_var_list_no_open to set 'allow_deref' argument to true.
(cp_parser_omp_target): Factor out code, adjust into calls to new
function finish_omp_target.
* pt.c (tsubst_expr): Add call to finish_omp_target_clauses for
OMP_TARGET case.
* semantics.c (handle_omp_array_sections_1): Add handling to create
'this->member' from 'member' FIELD_DECL. Remove case of rejecting
'this' when not in declare simd.
(handle_omp_array_sections): Likewise.
(finish_omp_clauses): Likewise. Adjust to allow 'this[]' in OpenMP
map clauses. Handle 'A->member' case in map clauses. Remove case of
rejecting 'this' when not in declare simd.
(struct omp_target_walk_data): New struct for walking over
target-directive tree body.
(finish_omp_target_clauses_r): New function for tree walk.
(finish_omp_target_clauses): New function.
(finish_omp_target): New function.
gcc/c/ChangeLog:
* c-parser.c (c_parser_omp_clause_map): Set 'allow_deref' argument in
call to c_parser_omp_variable_list to 'true'.
* c-typeck.c (handle_omp_array_sections_1): Add strip of MEM_REF in
array base handling.
(c_finish_omp_clauses): Handle 'A->member' case in map clauses.
gcc/ChangeLog:
* gimplify.c ("tree-hash-traits.h"): Add include.
(gimplify_scan_omp_clauses): Change struct_map_to_clause to type
hash_map<tree_operand, tree> *. Adjust struct map handling to handle
cases of *A and A->B expressions. Under !DECL_P case of
GOMP_CLAUSE_MAP handling, add STRIP_NOPS for indir_p case, add to
struct_deref_set for map(*ptr_to_struct) cases. Add MEM_REF case when
handling component_ref_p case. Add unshare_expr and gimplification
when created GOMP_MAP_STRUCT is not a DECL. Add code to add
firstprivate pointer for *pointer-to-struct case.
(gimplify_adjust_omp_clauses): Move GOMP_MAP_STRUCT removal code for
exit data directives code to earlier position.
* omp-low.c (lower_omp_target):
Handle GOMP_MAP_ATTACH_ZERO_LENGTH_ARRAY_SECTION, and
GOMP_MAP_POINTER_TO_ZERO_LENGTH_ARRAY_SECTION map kinds.
* tree-pretty-print.c (dump_omp_clause): Likewise.
gcc/testsuite/ChangeLog:
* gcc.dg/gomp/target-3.c: New testcase.
* g++.dg/gomp/target-3.C: New testcase.
* g++.dg/gomp/target-lambda-1.C: New testcase.
* g++.dg/gomp/target-lambda-2.C: New testcase.
* g++.dg/gomp/target-this-1.C: New testcase.
* g++.dg/gomp/target-this-2.C: New testcase.
* g++.dg/gomp/target-this-3.C: New testcase.
* g++.dg/gomp/target-this-4.C: New testcase.
* g++.dg/gomp/target-this-5.C: New testcase.
* g++.dg/gomp/this-2.C: Adjust testcase.
include/ChangeLog:
* gomp-constants.h (enum gomp_map_kind):
Add GOMP_MAP_ATTACH_ZERO_LENGTH_ARRAY_SECTION, and
GOMP_MAP_POINTER_TO_ZERO_LENGTH_ARRAY_SECTION map kinds.
(GOMP_MAP_POINTER_P):
Include GOMP_MAP_POINTER_TO_ZERO_LENGTH_ARRAY_SECTION.
libgomp/ChangeLog:
* libgomp.h (gomp_attach_pointer): Add bool parameter.
* oacc-mem.c (acc_attach_async): Update call to gomp_attach_pointer.
(goacc_enter_data_internal): Likewise.
* target.c (gomp_map_vars_existing): Update assert condition to
include GOMP_MAP_ATTACH_ZERO_LENGTH_ARRAY_SECTION.
(gomp_map_pointer): Add 'bool allow_zero_length_array_sections'
parameter, add support for mapping a pointer with NULL target.
(gomp_attach_pointer): Add 'bool allow_zero_length_array_sections'
parameter, add support for attaching a pointer with NULL target.
(gomp_map_vars_internal): Update calls to gomp_map_pointer and
gomp_attach_pointer, add handling for
GOMP_MAP_ATTACH_ZERO_LENGTH_ARRAY_SECTION, and
GOMP_MAP_POINTER_TO_ZERO_LENGTH_ARRAY_SECTION cases.
* testsuite/libgomp.c++/target-23.C: New testcase.
* testsuite/libgomp.c++/target-lambda-1.C: New testcase.
* testsuite/libgomp.c++/target-lambda-2.C: New testcase.
* testsuite/libgomp.c++/target-this-1.C: New testcase.
* testsuite/libgomp.c++/target-this-2.C: New testcase.
* testsuite/libgomp.c++/target-this-3.C: New testcase.
* testsuite/libgomp.c++/target-this-4.C: New testcase.
* testsuite/libgomp.c++/target-this-5.C: New testcase.
337 lines
14 KiB
C
337 lines
14 KiB
C
/* Communication between GCC and libgomp.
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Copyright (C) 2014-2021 Free Software Foundation, Inc.
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Contributed by Mentor Embedded.
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This file is part of the GNU Offloading and Multi Processing Library
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(libgomp).
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Libgomp is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef GOMP_CONSTANTS_H
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#define GOMP_CONSTANTS_H 1
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/* Memory mapping types. */
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/* One byte. */
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#define GOMP_MAP_LAST (1 << 8)
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#define GOMP_MAP_FLAG_TO (1 << 0)
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#define GOMP_MAP_FLAG_FROM (1 << 1)
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/* Special map kinds, enumerated starting here. */
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#define GOMP_MAP_FLAG_SPECIAL_0 (1 << 2)
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#define GOMP_MAP_FLAG_SPECIAL_1 (1 << 3)
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#define GOMP_MAP_FLAG_SPECIAL_2 (1 << 4)
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#define GOMP_MAP_FLAG_SPECIAL_3 (1 << 5)
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#define GOMP_MAP_FLAG_SPECIAL_4 (1 << 6)
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#define GOMP_MAP_FLAG_SPECIAL (GOMP_MAP_FLAG_SPECIAL_1 \
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| GOMP_MAP_FLAG_SPECIAL_0)
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#define GOMP_MAP_DEEP_COPY (GOMP_MAP_FLAG_SPECIAL_4 \
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| GOMP_MAP_FLAG_SPECIAL_2)
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/* This value indicates the map was created implicitly according to
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OpenMP rules. */
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#define GOMP_MAP_IMPLICIT (GOMP_MAP_FLAG_SPECIAL_3 \
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| GOMP_MAP_FLAG_SPECIAL_4)
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/* Mask for entire set of special map kind bits. */
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#define GOMP_MAP_FLAG_SPECIAL_BITS (GOMP_MAP_FLAG_SPECIAL_0 \
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| GOMP_MAP_FLAG_SPECIAL_1 \
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| GOMP_MAP_FLAG_SPECIAL_2 \
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| GOMP_MAP_FLAG_SPECIAL_3 \
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| GOMP_MAP_FLAG_SPECIAL_4)
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/* Flag to force a specific behavior (or else, trigger a run-time error). */
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#define GOMP_MAP_FLAG_FORCE (1 << 7)
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enum gomp_map_kind
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{
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/* If not already present, allocate. */
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GOMP_MAP_ALLOC = 0,
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/* ..., and copy to device. */
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GOMP_MAP_TO = (GOMP_MAP_ALLOC | GOMP_MAP_FLAG_TO),
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/* ..., and copy from device. */
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GOMP_MAP_FROM = (GOMP_MAP_ALLOC | GOMP_MAP_FLAG_FROM),
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/* ..., and copy to and from device. */
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GOMP_MAP_TOFROM = (GOMP_MAP_TO | GOMP_MAP_FROM),
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/* The following kind is an internal only map kind, used for pointer based
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array sections. OMP_CLAUSE_SIZE for these is not the pointer size,
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which is implicitly POINTER_SIZE_UNITS, but the bias. */
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GOMP_MAP_POINTER = (GOMP_MAP_FLAG_SPECIAL_0 | 0),
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/* Also internal, behaves like GOMP_MAP_TO, but additionally any
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GOMP_MAP_POINTER records consecutive after it which have addresses
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falling into that range will not be ignored if GOMP_MAP_TO_PSET wasn't
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mapped already.
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For OpenACC attach operations (e.g. copyin of struct members),
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GOMP_MAP_TO_PSET is followed by a single GOMP_MAP_ATTACH mapping
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instead. */
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GOMP_MAP_TO_PSET = (GOMP_MAP_FLAG_SPECIAL_0 | 1),
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/* Must already be present. */
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GOMP_MAP_FORCE_PRESENT = (GOMP_MAP_FLAG_SPECIAL_0 | 2),
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/* Deallocate a mapping, without copying from device. */
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GOMP_MAP_DELETE = (GOMP_MAP_FLAG_SPECIAL_0 | 3),
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/* Is a device pointer. OMP_CLAUSE_SIZE for these is unused; is implicitly
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POINTER_SIZE_UNITS. */
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GOMP_MAP_FORCE_DEVICEPTR = (GOMP_MAP_FLAG_SPECIAL_1 | 0),
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/* OpenACC device_resident. */
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GOMP_MAP_DEVICE_RESIDENT = (GOMP_MAP_FLAG_SPECIAL_1 | 1),
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/* OpenACC link. */
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GOMP_MAP_LINK = (GOMP_MAP_FLAG_SPECIAL_1 | 2),
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/* Use device data if present, fall back to host address otherwise. */
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GOMP_MAP_IF_PRESENT = (GOMP_MAP_FLAG_SPECIAL_1 | 3),
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/* Do not map, copy bits for firstprivate instead. */
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GOMP_MAP_FIRSTPRIVATE = (GOMP_MAP_FLAG_SPECIAL | 0),
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/* Similarly, but store the value in the pointer rather than
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pointed by the pointer. */
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GOMP_MAP_FIRSTPRIVATE_INT = (GOMP_MAP_FLAG_SPECIAL | 1),
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/* Pointer translate host address into device address and copy that
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back to host. */
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GOMP_MAP_USE_DEVICE_PTR = (GOMP_MAP_FLAG_SPECIAL | 2),
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/* Allocate a zero length array section. Prefer next non-zero length
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mapping over previous non-zero length mapping over zero length mapping
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at the address. If not already mapped, do nothing (and pointer translate
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to NULL). */
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GOMP_MAP_ZERO_LEN_ARRAY_SECTION = (GOMP_MAP_FLAG_SPECIAL | 3),
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/* Allocate. */
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GOMP_MAP_FORCE_ALLOC = (GOMP_MAP_FLAG_FORCE | GOMP_MAP_ALLOC),
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/* ..., and copy to device. */
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GOMP_MAP_FORCE_TO = (GOMP_MAP_FLAG_FORCE | GOMP_MAP_TO),
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/* ..., and copy from device. */
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GOMP_MAP_FORCE_FROM = (GOMP_MAP_FLAG_FORCE | GOMP_MAP_FROM),
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/* ..., and copy to and from device. */
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GOMP_MAP_FORCE_TOFROM = (GOMP_MAP_FLAG_FORCE | GOMP_MAP_TOFROM),
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/* Like GOMP_MAP_USE_DEVICE_PTR above, translate a host to a device
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address. If translation fails because the target is not mapped,
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continue using the host address. */
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GOMP_MAP_USE_DEVICE_PTR_IF_PRESENT = (GOMP_MAP_FLAG_SPECIAL_2 | 0),
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/* If not already present, allocate. And unconditionally copy to
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device. */
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GOMP_MAP_ALWAYS_TO = (GOMP_MAP_FLAG_SPECIAL_2 | GOMP_MAP_TO),
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/* If not already present, allocate. And unconditionally copy from
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device. */
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GOMP_MAP_ALWAYS_FROM = (GOMP_MAP_FLAG_SPECIAL_2
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| GOMP_MAP_FROM),
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/* If not already present, allocate. And unconditionally copy to and from
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device. */
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GOMP_MAP_ALWAYS_TOFROM = (GOMP_MAP_FLAG_SPECIAL_2
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| GOMP_MAP_TOFROM),
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/* Map a sparse struct; the address is the base of the structure, alignment
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it's required alignment, and size is the number of adjacent entries
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that belong to the struct. The adjacent entries should be sorted by
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increasing address, so it is easy to determine lowest needed address
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(address of the first adjacent entry) and highest needed address
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(address of the last adjacent entry plus its size). */
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GOMP_MAP_STRUCT = (GOMP_MAP_FLAG_SPECIAL_2
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| GOMP_MAP_FLAG_SPECIAL | 0),
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/* On a location of a pointer/reference that is assumed to be already mapped
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earlier, store the translated address of the preceeding mapping.
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No refcount is bumped by this, and the store is done unconditionally. */
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GOMP_MAP_ALWAYS_POINTER = (GOMP_MAP_FLAG_SPECIAL_2
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| GOMP_MAP_FLAG_SPECIAL | 1),
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/* Like GOMP_MAP_POINTER, but allow zero-length array section, i.e. set to
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NULL if target is not mapped. */
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GOMP_MAP_POINTER_TO_ZERO_LENGTH_ARRAY_SECTION
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= (GOMP_MAP_FLAG_SPECIAL_2
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| GOMP_MAP_FLAG_SPECIAL | 2),
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/* Forced deallocation of zero length array section. */
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GOMP_MAP_DELETE_ZERO_LEN_ARRAY_SECTION
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= (GOMP_MAP_FLAG_SPECIAL_2
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| GOMP_MAP_FLAG_SPECIAL | 3),
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/* Decrement usage count and deallocate if zero. */
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GOMP_MAP_RELEASE = (GOMP_MAP_FLAG_SPECIAL_2
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| GOMP_MAP_DELETE),
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/* The attach/detach mappings below use the OMP_CLAUSE_SIZE field as a
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bias. This will typically be zero, except when mapping an array slice
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with a non-zero base. In that case the bias will indicate the
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(positive) difference between the start of the actual mapped data and
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the "virtual" origin of the array.
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In OpenACC, attach a pointer to a mapped struct field. */
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GOMP_MAP_ATTACH = (GOMP_MAP_DEEP_COPY | 0),
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/* In OpenACC, detach a pointer to a mapped struct field. */
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GOMP_MAP_DETACH = (GOMP_MAP_DEEP_COPY | 1),
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/* In OpenACC, detach a pointer to a mapped struct field. */
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GOMP_MAP_FORCE_DETACH = (GOMP_MAP_DEEP_COPY
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| GOMP_MAP_FLAG_FORCE | 1),
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/* Like GOMP_MAP_ATTACH, but allow attaching to zero-length array sections
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(i.e. set to NULL when array section is not mapped) Currently only used
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by OpenMP. */
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GOMP_MAP_ATTACH_ZERO_LENGTH_ARRAY_SECTION
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= (GOMP_MAP_DEEP_COPY | 2),
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/* Internal to GCC, not used in libgomp. */
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/* Do not map, but pointer assign a pointer instead. */
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GOMP_MAP_FIRSTPRIVATE_POINTER = (GOMP_MAP_LAST | 1),
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/* Do not map, but pointer assign a reference instead. */
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GOMP_MAP_FIRSTPRIVATE_REFERENCE = (GOMP_MAP_LAST | 2),
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/* An attach or detach operation. Rewritten to the appropriate type during
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gimplification, depending on directive (i.e. "enter data" or
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parallel/kernels region vs. "exit data"). */
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GOMP_MAP_ATTACH_DETACH = (GOMP_MAP_LAST | 3)
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};
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#define GOMP_MAP_COPY_TO_P(X) \
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(!((X) & GOMP_MAP_FLAG_SPECIAL) \
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&& ((X) & GOMP_MAP_FLAG_TO))
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#define GOMP_MAP_COPY_FROM_P(X) \
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(!((X) & GOMP_MAP_FLAG_SPECIAL) \
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&& ((X) & GOMP_MAP_FLAG_FROM))
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#define GOMP_MAP_ALWAYS_POINTER_P(X) \
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((X) == GOMP_MAP_ALWAYS_POINTER)
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#define GOMP_MAP_POINTER_P(X) \
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((X) == GOMP_MAP_POINTER \
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|| (X) == GOMP_MAP_POINTER_TO_ZERO_LENGTH_ARRAY_SECTION)
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#define GOMP_MAP_ALWAYS_TO_P(X) \
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(((X) == GOMP_MAP_ALWAYS_TO) || ((X) == GOMP_MAP_ALWAYS_TOFROM))
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#define GOMP_MAP_ALWAYS_FROM_P(X) \
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(((X) == GOMP_MAP_ALWAYS_FROM) || ((X) == GOMP_MAP_ALWAYS_TOFROM))
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#define GOMP_MAP_ALWAYS_P(X) \
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(GOMP_MAP_ALWAYS_TO_P (X) || ((X) == GOMP_MAP_ALWAYS_FROM))
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#define GOMP_MAP_IMPLICIT_P(X) \
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(((X) & GOMP_MAP_FLAG_SPECIAL_BITS) == GOMP_MAP_IMPLICIT)
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/* Asynchronous behavior. Keep in sync with
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libgomp/{openacc.h,openacc.f90,openacc_lib.h}:acc_async_t. */
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#define GOMP_ASYNC_NOVAL -1
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#define GOMP_ASYNC_SYNC -2
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/* Device codes. Keep in sync with
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libgomp/{openacc.h,openacc.f90,openacc_lib.h}:acc_device_t as well as
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libgomp/libgomp-plugin.h. */
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#define GOMP_DEVICE_NONE 0
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#define GOMP_DEVICE_DEFAULT 1
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#define GOMP_DEVICE_HOST 2
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/* #define GOMP_DEVICE_HOST_NONSHM 3 removed. */
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#define GOMP_DEVICE_NOT_HOST 4
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#define GOMP_DEVICE_NVIDIA_PTX 5
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#define GOMP_DEVICE_INTEL_MIC 6
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#define GOMP_DEVICE_HSA 7
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#define GOMP_DEVICE_GCN 8
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#define GOMP_DEVICE_ICV -1
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#define GOMP_DEVICE_HOST_FALLBACK -2
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/* GOMP_task/GOMP_taskloop* flags argument. */
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#define GOMP_TASK_FLAG_UNTIED (1 << 0)
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#define GOMP_TASK_FLAG_FINAL (1 << 1)
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#define GOMP_TASK_FLAG_MERGEABLE (1 << 2)
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#define GOMP_TASK_FLAG_DEPEND (1 << 3)
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#define GOMP_TASK_FLAG_PRIORITY (1 << 4)
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#define GOMP_TASK_FLAG_UP (1 << 8)
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#define GOMP_TASK_FLAG_GRAINSIZE (1 << 9)
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#define GOMP_TASK_FLAG_IF (1 << 10)
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#define GOMP_TASK_FLAG_NOGROUP (1 << 11)
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#define GOMP_TASK_FLAG_REDUCTION (1 << 12)
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#define GOMP_TASK_FLAG_DETACH (1 << 13)
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#define GOMP_TASK_FLAG_STRICT (1 << 14)
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/* GOMP_target{_ext,update_ext,enter_exit_data} flags argument. */
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#define GOMP_TARGET_FLAG_NOWAIT (1 << 0)
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#define GOMP_TARGET_FLAG_EXIT_DATA (1 << 1)
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/* Internal to libgomp. */
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#define GOMP_TARGET_FLAG_UPDATE (1U << 31)
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/* OpenACC construct flags. */
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/* Force host fallback execution. */
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#define GOACC_FLAG_HOST_FALLBACK (1 << 0)
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/* For legacy reasons, in the ABI, the GOACC_FLAGs are encoded as an inverted
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bitmask. */
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#define GOACC_FLAGS_MARSHAL_OP BIT_NOT_EXPR
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#define GOACC_FLAGS_UNMARSHAL(X) (~(X))
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/* Versions of libgomp and device-specific plugins. GOMP_VERSION
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should be incremented whenever an ABI-incompatible change is introduced
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to the plugin interface defined in libgomp/libgomp.h. */
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#define GOMP_VERSION 1
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#define GOMP_VERSION_NVIDIA_PTX 1
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#define GOMP_VERSION_INTEL_MIC 0
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#define GOMP_VERSION_GCN 1
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#define GOMP_VERSION_PACK(LIB, DEV) (((LIB) << 16) | (DEV))
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#define GOMP_VERSION_LIB(PACK) (((PACK) >> 16) & 0xffff)
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#define GOMP_VERSION_DEV(PACK) ((PACK) & 0xffff)
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#define GOMP_DIM_GANG 0
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#define GOMP_DIM_WORKER 1
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#define GOMP_DIM_VECTOR 2
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#define GOMP_DIM_MAX 3
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#define GOMP_DIM_MASK(X) (1u << (X))
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/* Varadic launch arguments. End of list is marked by a zero. */
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#define GOMP_LAUNCH_DIM 1 /* Launch dimensions, op = mask */
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#define GOMP_LAUNCH_ASYNC 2 /* Async, op = cst val if not MAX */
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#define GOMP_LAUNCH_WAIT 3 /* Waits, op = num waits. */
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#define GOMP_LAUNCH_CODE_SHIFT 28
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#define GOMP_LAUNCH_DEVICE_SHIFT 16
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#define GOMP_LAUNCH_OP_SHIFT 0
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#define GOMP_LAUNCH_PACK(CODE,DEVICE,OP) \
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(((CODE) << GOMP_LAUNCH_CODE_SHIFT) \
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| ((DEVICE) << GOMP_LAUNCH_DEVICE_SHIFT) \
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| ((OP) << GOMP_LAUNCH_OP_SHIFT))
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#define GOMP_LAUNCH_CODE(X) (((X) >> GOMP_LAUNCH_CODE_SHIFT) & 0xf)
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#define GOMP_LAUNCH_DEVICE(X) (((X) >> GOMP_LAUNCH_DEVICE_SHIFT) & 0xfff)
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#define GOMP_LAUNCH_OP(X) (((X) >> GOMP_LAUNCH_OP_SHIFT) & 0xffff)
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#define GOMP_LAUNCH_OP_MAX 0xffff
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/* Bitmask to apply in order to find out the intended device of a target
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argument. */
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#define GOMP_TARGET_ARG_DEVICE_MASK ((1 << 7) - 1)
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/* The target argument is significant for all devices. */
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#define GOMP_TARGET_ARG_DEVICE_ALL 0
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/* Flag set when the subsequent element in the device-specific argument
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values. */
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#define GOMP_TARGET_ARG_SUBSEQUENT_PARAM (1 << 7)
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/* Bitmask to apply to a target argument to find out the value identifier. */
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#define GOMP_TARGET_ARG_ID_MASK (((1 << 8) - 1) << 8)
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/* Target argument index of NUM_TEAMS. */
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#define GOMP_TARGET_ARG_NUM_TEAMS (1 << 8)
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/* Target argument index of THREAD_LIMIT. */
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#define GOMP_TARGET_ARG_THREAD_LIMIT (2 << 8)
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/* If the value is directly embeded in target argument, it should be a 16-bit
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at most and shifted by this many bits. */
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#define GOMP_TARGET_ARG_VALUE_SHIFT 16
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/* Dependence types in omp_depend_t objects. */
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#define GOMP_DEPEND_IN 1
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#define GOMP_DEPEND_OUT 2
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#define GOMP_DEPEND_INOUT 3
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#define GOMP_DEPEND_MUTEXINOUTSET 4
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/* HSA specific data structures. */
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/* Identifiers of device-specific target arguments. */
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#define GOMP_TARGET_ARG_HSA_KERNEL_ATTRIBUTES (1 << 8)
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#endif
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