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c-common.c (c_common_attribute_table): Handle "omp declare target link" attribute.

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gcc/c-family/
	* c-common.c (c_common_attribute_table): Handle "omp declare target
	link" attribute.
gcc/
	* cgraphunit.c (output_in_order): Do not assemble "omp declare target
	link" variables in ACCEL_COMPILER.
	* gimplify.c (gimplify_adjust_omp_clauses): Do not remove mapping of
	"omp declare target link" variables.
	* omp-low.c (scan_sharing_clauses): Do not remove mapping of "omp
	declare target link" variables.
	(add_decls_addresses_to_decl_constructor): For "omp declare target link"
	variables output address of the artificial pointer instead of address of
	the variable.  Set most significant bit of the size to mark them.
	(pass_data_omp_target_link): New pass_data.
	(pass_omp_target_link): New class.
	(find_link_var_op): New static function.
	(make_pass_omp_target_link): New function.
	* passes.def: Add pass_omp_target_link.
	* tree-pass.h (make_pass_omp_target_link): Declare.
	* varpool.c (symbol_table::output_variables): Do not assemble "omp
	declare target link" variables in ACCEL_COMPILER.
gcc/lto/
	* lto.c: Include stringpool.h and fold-const.h.
	(offload_handle_link_vars): New static function.
	(lto_main): Call offload_handle_link_vars.
libgomp/
	* libgomp.h (REFCOUNT_LINK): Define.
	(struct splay_tree_key_s): Add link_key.
	* target.c (gomp_map_vars): Treat REFCOUNT_LINK objects as not mapped.
	Replace target address of the pointer with target address of newly
	mapped object in the splay tree.  Set link pointer on target to the
	device address of the mapped object.
	(gomp_unmap_vars): Restore target address of the pointer in the splay
	tree for REFCOUNT_LINK objects after unmapping.
	(gomp_load_image_to_device): Set refcount to REFCOUNT_LINK for "omp
	declare target link" objects.
	(gomp_unload_image_from_device): Replace j with i.  Force unmap of all
	"omp declare target link" objects, which were mapped for the image.
	(gomp_exit_data): Restore target address of the pointer in the splay
	tree for REFCOUNT_LINK objects after unmapping.
	* testsuite/libgomp.c/target-link-1.c: New file.

From-SVN: r231655
This commit is contained in:
Ilya Verbin 2015-12-15 14:56:50 +00:00 committed by Ilya Verbin
parent b7e2dd6fb4
commit 4a38b02b4e
15 changed files with 368 additions and 24 deletions
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20
gcc/ChangeLog
View File

@ -1,3 +1,23 @@
2015-12-15 Ilya Verbin <ilya.verbin@intel.com>
* cgraphunit.c (output_in_order): Do not assemble "omp declare target
link" variables in ACCEL_COMPILER.
* gimplify.c (gimplify_adjust_omp_clauses): Do not remove mapping of
"omp declare target link" variables.
* omp-low.c (scan_sharing_clauses): Do not remove mapping of "omp
declare target link" variables.
(add_decls_addresses_to_decl_constructor): For "omp declare target link"
variables output address of the artificial pointer instead of address of
the variable. Set most significant bit of the size to mark them.
(pass_data_omp_target_link): New pass_data.
(pass_omp_target_link): New class.
(find_link_var_op): New static function.
(make_pass_omp_target_link): New function.
* passes.def: Add pass_omp_target_link.
* tree-pass.h (make_pass_omp_target_link): Declare.
* varpool.c (symbol_table::output_variables): Do not assemble "omp
declare target link" variables in ACCEL_COMPILER.
2015-12-15 Bernd Schmidt <bschmidt@redhat.com>
PR middle-end/21273

5
gcc/c-family/ChangeLog
View File

@ -1,3 +1,8 @@
2015-12-15 Ilya Verbin <ilya.verbin@intel.com>
* c-common.c (c_common_attribute_table): Handle "omp declare target
link" attribute.
2015-12-14 Jakub Jelinek <jakub@redhat.com>
PR c/68833

2
gcc/c-family/c-common.c
View File

@ -821,6 +821,8 @@ const struct attribute_spec c_common_attribute_table[] =
handle_simd_attribute, false },
{ "omp declare target", 0, 0, true, false, false,
handle_omp_declare_target_attribute, false },
{ "omp declare target link", 0, 0, true, false, false,
handle_omp_declare_target_attribute, false },
{ "alloc_align", 1, 1, false, true, true,
handle_alloc_align_attribute, false },
{ "assume_aligned", 1, 2, false, true, true,

7
gcc/cgraphunit.c
View File

@ -2210,6 +2210,13 @@ output_in_order (bool no_reorder)
break;
case ORDER_VAR:
#ifdef ACCEL_COMPILER
/* Do not assemble "omp declare target link" vars. */
if (DECL_HAS_VALUE_EXPR_P (nodes[i].u.v->decl)
&& lookup_attribute ("omp declare target link",
DECL_ATTRIBUTES (nodes[i].u.v->decl)))
break;
#endif
nodes[i].u.v->assemble_decl ();
break;

4
gcc/gimplify.c
View File

@ -7910,7 +7910,9 @@ gimplify_adjust_omp_clauses (gimple_seq *pre_p, gimple_seq body, tree *list_p,
n = splay_tree_lookup (ctx->variables, (splay_tree_key) decl);
if ((ctx->region_type & ORT_TARGET) != 0
&& !(n->value & GOVD_SEEN)
&& GOMP_MAP_ALWAYS_P (OMP_CLAUSE_MAP_KIND (c)) == 0)
&& GOMP_MAP_ALWAYS_P (OMP_CLAUSE_MAP_KIND (c)) == 0
&& !lookup_attribute ("omp declare target link",
DECL_ATTRIBUTES (decl)))
{
remove = true;
/* For struct element mapping, if struct is never referenced

6
gcc/lto/ChangeLog
View File

@ -1,3 +1,9 @@
2015-12-15 Ilya Verbin <ilya.verbin@intel.com>
* lto.c: Include stringpool.h and fold-const.h.
(offload_handle_link_vars): New static function.
(lto_main): Call offload_handle_link_vars.
2015-12-10 Jan Hubicka <hubicka@ucw.cz>
* lto.c (lto_read_in_decl_state): Unpickle compressed bit.

35
gcc/lto/lto.c
View File

@ -50,6 +50,8 @@ along with GCC; see the file COPYING3. If not see
#include "ipa-utils.h"
#include "gomp-constants.h"
#include "lto-symtab.h"
#include "stringpool.h"
#include "fold-const.h"
/* Number of parallel tasks to run, -1 if we want to use GNU Make jobserver. */
@ -3226,6 +3228,37 @@ lto_init (void)
#endif
}
/* Create artificial pointers for "omp declare target link" vars. */
static void
offload_handle_link_vars (void)
{
#ifdef ACCEL_COMPILER
varpool_node *var;
FOR_EACH_VARIABLE (var)
if (lookup_attribute ("omp declare target link",
DECL_ATTRIBUTES (var->decl)))
{
tree type = build_pointer_type (TREE_TYPE (var->decl));
tree link_ptr_var = make_node (VAR_DECL);
TREE_TYPE (link_ptr_var) = type;
TREE_USED (link_ptr_var) = 1;
TREE_STATIC (link_ptr_var) = 1;
DECL_MODE (link_ptr_var) = TYPE_MODE (type);
DECL_SIZE (link_ptr_var) = TYPE_SIZE (type);
DECL_SIZE_UNIT (link_ptr_var) = TYPE_SIZE_UNIT (type);
DECL_ARTIFICIAL (link_ptr_var) = 1;
tree var_name = DECL_ASSEMBLER_NAME (var->decl);
char *new_name
= ACONCAT ((IDENTIFIER_POINTER (var_name), "_linkptr", NULL));
DECL_NAME (link_ptr_var) = get_identifier (new_name);
SET_DECL_ASSEMBLER_NAME (link_ptr_var, DECL_NAME (link_ptr_var));
SET_DECL_VALUE_EXPR (var->decl, build_simple_mem_ref (link_ptr_var));
DECL_HAS_VALUE_EXPR_P (var->decl) = 1;
}
#endif
}
/* Main entry point for the GIMPLE front end. This front end has
three main personalities:
@ -3274,6 +3307,8 @@ lto_main (void)
if (!seen_error ())
{
offload_handle_link_vars ();
/* If WPA is enabled analyze the whole call graph and create an
optimization plan. Otherwise, read in all the function
bodies and continue with optimization. */

131
gcc/omp-low.c
View File

@ -2026,7 +2026,8 @@ scan_sharing_clauses (tree clauses, omp_context *ctx,
decl = OMP_CLAUSE_DECL (c);
/* Global variables with "omp declare target" attribute
don't need to be copied, the receiver side will use them
directly. */
directly. However, global variables with "omp declare target link"
attribute need to be copied. */
if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_MAP
&& DECL_P (decl)
&& ((OMP_CLAUSE_MAP_KIND (c) != GOMP_MAP_FIRSTPRIVATE_POINTER
@ -2034,7 +2035,9 @@ scan_sharing_clauses (tree clauses, omp_context *ctx,
!= GOMP_MAP_FIRSTPRIVATE_REFERENCE))
|| TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE)
&& is_global_var (maybe_lookup_decl_in_outer_ctx (decl, ctx))
&& varpool_node::get_create (decl)->offloadable)
&& varpool_node::get_create (decl)->offloadable
&& !lookup_attribute ("omp declare target link",
DECL_ATTRIBUTES (decl)))
break;
if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_MAP
&& OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_POINTER)
@ -18588,13 +18591,45 @@ add_decls_addresses_to_decl_constructor (vec<tree, va_gc> *v_decls,
for (unsigned i = 0; i < len; i++)
{
tree it = (*v_decls)[i];
bool is_function = TREE_CODE (it) != VAR_DECL;
bool is_var = TREE_CODE (it) == VAR_DECL;
bool is_link_var
= is_var
#ifdef ACCEL_COMPILER
&& DECL_HAS_VALUE_EXPR_P (it)
#endif
&& lookup_attribute ("omp declare target link", DECL_ATTRIBUTES (it));
CONSTRUCTOR_APPEND_ELT (v_ctor, NULL_TREE, build_fold_addr_expr (it));
if (!is_function)
CONSTRUCTOR_APPEND_ELT (v_ctor, NULL_TREE,
fold_convert (const_ptr_type_node,
DECL_SIZE_UNIT (it)));
tree size = NULL_TREE;
if (is_var)
size = fold_convert (const_ptr_type_node, DECL_SIZE_UNIT (it));
tree addr;
if (!is_link_var)
addr = build_fold_addr_expr (it);
else
{
#ifdef ACCEL_COMPILER
/* For "omp declare target link" vars add address of the pointer to
the target table, instead of address of the var. */
tree value_expr = DECL_VALUE_EXPR (it);
tree link_ptr_decl = TREE_OPERAND (value_expr, 0);
varpool_node::finalize_decl (link_ptr_decl);
addr = build_fold_addr_expr (link_ptr_decl);
#else
addr = build_fold_addr_expr (it);
#endif
/* Most significant bit of the size marks "omp declare target link"
vars in host and target tables. */
unsigned HOST_WIDE_INT isize = tree_to_uhwi (size);
isize |= 1ULL << (int_size_in_bytes (const_ptr_type_node)
* BITS_PER_UNIT - 1);
size = wide_int_to_tree (const_ptr_type_node, isize);
}
CONSTRUCTOR_APPEND_ELT (v_ctor, NULL_TREE, addr);
if (is_var)
CONSTRUCTOR_APPEND_ELT (v_ctor, NULL_TREE, size);
}
}
@ -19831,4 +19866,84 @@ make_pass_oacc_device_lower (gcc::context *ctxt)
return new pass_oacc_device_lower (ctxt);
}
/* "omp declare target link" handling pass. */
namespace {
const pass_data pass_data_omp_target_link =
{
GIMPLE_PASS, /* type */
"omptargetlink", /* name */
OPTGROUP_NONE, /* optinfo_flags */
TV_NONE, /* tv_id */
PROP_ssa, /* properties_required */
0, /* properties_provided */
0, /* properties_destroyed */
0, /* todo_flags_start */
TODO_update_ssa, /* todo_flags_finish */
};
class pass_omp_target_link : public gimple_opt_pass
{
public:
pass_omp_target_link (gcc::context *ctxt)
: gimple_opt_pass (pass_data_omp_target_link, ctxt)
{}
/* opt_pass methods: */
virtual bool gate (function *fun)
{
#ifdef ACCEL_COMPILER
tree attrs = DECL_ATTRIBUTES (fun->decl);
return lookup_attribute ("omp declare target", attrs)
|| lookup_attribute ("omp target entrypoint", attrs);
#else
(void) fun;
return false;
#endif
}
virtual unsigned execute (function *);
};
/* Callback for walk_gimple_stmt used to scan for link var operands. */
static tree
find_link_var_op (tree *tp, int *walk_subtrees, void *)
{
tree t = *tp;
if (TREE_CODE (t) == VAR_DECL && DECL_HAS_VALUE_EXPR_P (t)
&& lookup_attribute ("omp declare target link", DECL_ATTRIBUTES (t)))
{
*walk_subtrees = 0;
return t;
}
return NULL_TREE;
}
unsigned
pass_omp_target_link::execute (function *fun)
{
basic_block bb;
FOR_EACH_BB_FN (bb, fun)
{
gimple_stmt_iterator gsi;
for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
if (walk_gimple_stmt (&gsi, NULL, find_link_var_op, NULL))
gimple_regimplify_operands (gsi_stmt (gsi), &gsi);
}
return 0;
}
} // anon namespace
gimple_opt_pass *
make_pass_omp_target_link (gcc::context *ctxt)
{
return new pass_omp_target_link (ctxt);
}
#include "gt-omp-low.h"

1
gcc/passes.def
View File

@ -170,6 +170,7 @@ along with GCC; see the file COPYING3. If not see
NEXT_PASS (pass_fixup_cfg);
NEXT_PASS (pass_lower_eh_dispatch);
NEXT_PASS (pass_oacc_device_lower);
NEXT_PASS (pass_omp_target_link);
NEXT_PASS (pass_all_optimizations);
PUSH_INSERT_PASSES_WITHIN (pass_all_optimizations)
NEXT_PASS (pass_remove_cgraph_callee_edges);

1
gcc/tree-pass.h
View File

@ -417,6 +417,7 @@ extern gimple_opt_pass *make_pass_lower_omp (gcc::context *ctxt);
extern gimple_opt_pass *make_pass_diagnose_omp_blocks (gcc::context *ctxt);
extern gimple_opt_pass *make_pass_expand_omp (gcc::context *ctxt);
extern gimple_opt_pass *make_pass_expand_omp_ssa (gcc::context *ctxt);
extern gimple_opt_pass *make_pass_omp_target_link (gcc::context *ctxt);
extern gimple_opt_pass *make_pass_oacc_device_lower (gcc::context *ctxt);
extern gimple_opt_pass *make_pass_object_sizes (gcc::context *ctxt);
extern gimple_opt_pass *make_pass_strlen (gcc::context *ctxt);

7
gcc/varpool.c
View File

@ -748,6 +748,13 @@ symbol_table::output_variables (void)
/* Handled in output_in_order. */
if (node->no_reorder)
continue;
#ifdef ACCEL_COMPILER
/* Do not assemble "omp declare target link" vars. */
if (DECL_HAS_VALUE_EXPR_P (node->decl)
&& lookup_attribute ("omp declare target link",
DECL_ATTRIBUTES (node->decl)))
continue;
#endif
if (node->assemble_decl ())
changed = true;
}

18
libgomp/ChangeLog
View File

@ -1,3 +1,21 @@
2015-12-15 Ilya Verbin <ilya.verbin@intel.com>
* libgomp.h (REFCOUNT_LINK): Define.
(struct splay_tree_key_s): Add link_key.
* target.c (gomp_map_vars): Treat REFCOUNT_LINK objects as not mapped.
Replace target address of the pointer with target address of newly
mapped object in the splay tree. Set link pointer on target to the
device address of the mapped object.
(gomp_unmap_vars): Restore target address of the pointer in the splay
tree for REFCOUNT_LINK objects after unmapping.
(gomp_load_image_to_device): Set refcount to REFCOUNT_LINK for "omp
declare target link" objects.
(gomp_unload_image_from_device): Replace j with i. Force unmap of all
"omp declare target link" objects, which were mapped for the image.
(gomp_exit_data): Restore target address of the pointer in the splay
tree for REFCOUNT_LINK objects after unmapping.
* testsuite/libgomp.c/target-link-1.c: New file.
2015-12-14 Ilya Verbin <ilya.verbin@intel.com>
* libgomp.h (gomp_device_state): New enum.

5
libgomp/libgomp.h
View File

@ -817,6 +817,9 @@ struct target_mem_desc {
/* Special value for refcount - infinity. */
#define REFCOUNT_INFINITY (~(uintptr_t) 0)
/* Special value for refcount - tgt_offset contains target address of the
artificial pointer to "omp declare target link" object. */
#define REFCOUNT_LINK (~(uintptr_t) 1)
struct splay_tree_key_s {
/* Address of the host object. */
@ -831,6 +834,8 @@ struct splay_tree_key_s {
uintptr_t refcount;
/* Asynchronous reference count. */
uintptr_t async_refcount;
/* Pointer to the original mapping of "omp declare target link" object. */
splay_tree_key link_key;
};
/* The comparison function. */

87
libgomp/target.c
View File

@ -464,7 +464,7 @@ gomp_map_vars (struct gomp_device_descr *devicep, size_t mapnum,
}
else
n = splay_tree_lookup (mem_map, &cur_node);
if (n)
if (n && n->refcount != REFCOUNT_LINK)
gomp_map_vars_existing (devicep, n, &cur_node, &tgt->list[i],
kind & typemask);
else
@ -628,11 +628,19 @@ gomp_map_vars (struct gomp_device_descr *devicep, size_t mapnum,
else
k->host_end = k->host_start + sizeof (void *);
splay_tree_key n = splay_tree_lookup (mem_map, k);
if (n)
if (n && n->refcount != REFCOUNT_LINK)
gomp_map_vars_existing (devicep, n, k, &tgt->list[i],
kind & typemask);
else
{
k->link_key = NULL;
if (n && n->refcount == REFCOUNT_LINK)
{
/* Replace target address of the pointer with target address
of mapped object in the splay tree. */
splay_tree_remove (mem_map, n);
k->link_key = n;
}
size_t align = (size_t) 1 << (kind >> rshift);
tgt->list[i].key = k;
k->tgt = tgt;
@ -752,6 +760,16 @@ gomp_map_vars (struct gomp_device_descr *devicep, size_t mapnum,
gomp_fatal ("%s: unhandled kind 0x%.2x", __FUNCTION__,
kind);
}
if (k->link_key)
{
/* Set link pointer on target to the device address of the
mapped object. */
void *tgt_addr = (void *) (tgt->tgt_start + k->tgt_offset);
devicep->host2dev_func (devicep->target_id,
(void *) n->tgt_offset,
&tgt_addr, sizeof (void *));
}
array++;
}
}
@ -884,6 +902,9 @@ gomp_unmap_vars (struct target_mem_desc *tgt, bool do_copyfrom)
if (do_unmap)
{
splay_tree_remove (&devicep->mem_map, k);
if (k->link_key)
splay_tree_insert (&devicep->mem_map,
(splay_tree_node) k->link_key);
if (k->tgt->refcount > 1)
k->tgt->refcount--;
else
@ -1020,31 +1041,40 @@ gomp_load_image_to_device (struct gomp_device_descr *devicep, unsigned version,
k->tgt_offset = target_table[i].start;
k->refcount = REFCOUNT_INFINITY;
k->async_refcount = 0;
k->link_key = NULL;
array->left = NULL;
array->right = NULL;
splay_tree_insert (&devicep->mem_map, array);
array++;
}
/* Most significant bit of the size in host and target tables marks
"omp declare target link" variables. */
const uintptr_t link_bit = 1ULL << (sizeof (uintptr_t) * __CHAR_BIT__ - 1);
const uintptr_t size_mask = ~link_bit;
for (i = 0; i < num_vars; i++)
{
struct addr_pair *target_var = &target_table[num_funcs + i];
if (target_var->end - target_var->start
!= (uintptr_t) host_var_table[i * 2 + 1])
uintptr_t target_size = target_var->end - target_var->start;
if ((uintptr_t) host_var_table[i * 2 + 1] != target_size)
{
gomp_mutex_unlock (&devicep->lock);
if (is_register_lock)
gomp_mutex_unlock (&register_lock);
gomp_fatal ("Can't map target variables (size mismatch)");
gomp_fatal ("Cannot map target variables (size mismatch)");
}
splay_tree_key k = &array->key;
k->host_start = (uintptr_t) host_var_table[i * 2];
k->host_end = k->host_start + (uintptr_t) host_var_table[i * 2 + 1];
k->host_end
= k->host_start + (size_mask & (uintptr_t) host_var_table[i * 2 + 1]);
k->tgt = tgt;
k->tgt_offset = target_var->start;
k->refcount = REFCOUNT_INFINITY;
k->refcount = target_size & link_bit ? REFCOUNT_LINK : REFCOUNT_INFINITY;
k->async_refcount = 0;
k->link_key = NULL;
array->left = NULL;
array->right = NULL;
splay_tree_insert (&devicep->mem_map, array);
@ -1072,7 +1102,6 @@ gomp_unload_image_from_device (struct gomp_device_descr *devicep,
int num_funcs = host_funcs_end - host_func_table;
int num_vars = (host_vars_end - host_var_table) / 2;
unsigned j;
struct splay_tree_key_s k;
splay_tree_key node = NULL;
@ -1088,21 +1117,46 @@ gomp_unload_image_from_device (struct gomp_device_descr *devicep,
devicep->unload_image_func (devicep->target_id, version, target_data);
/* Remove mappings from splay tree. */
for (j = 0; j < num_funcs; j++)
int i;
for (i = 0; i < num_funcs; i++)
{
k.host_start = (uintptr_t) host_func_table[j];
k.host_start = (uintptr_t) host_func_table[i];
k.host_end = k.host_start + 1;
splay_tree_remove (&devicep->mem_map, &k);
}
for (j = 0; j < num_vars; j++)
/* Most significant bit of the size in host and target tables marks
"omp declare target link" variables. */
const uintptr_t link_bit = 1ULL << (sizeof (uintptr_t) * __CHAR_BIT__ - 1);
const uintptr_t size_mask = ~link_bit;
bool is_tgt_unmapped = false;
for (i = 0; i < num_vars; i++)
{
k.host_start = (uintptr_t) host_var_table[j * 2];
k.host_end = k.host_start + (uintptr_t) host_var_table[j * 2 + 1];
splay_tree_remove (&devicep->mem_map, &k);
k.host_start = (uintptr_t) host_var_table[i * 2];
k.host_end
= k.host_start + (size_mask & (uintptr_t) host_var_table[i * 2 + 1]);
if (!(link_bit & (uintptr_t) host_var_table[i * 2 + 1]))
splay_tree_remove (&devicep->mem_map, &k);
else
{
splay_tree_key n = splay_tree_lookup (&devicep->mem_map, &k);
splay_tree_remove (&devicep->mem_map, n);
if (n->link_key)
{
if (n->tgt->refcount > 1)
n->tgt->refcount--;
else
{
is_tgt_unmapped = true;
gomp_unmap_tgt (n->tgt);
}
}
}
}
if (node)
if (node && !is_tgt_unmapped)
{
free (node->tgt);
free (node);
@ -1658,6 +1712,9 @@ gomp_exit_data (struct gomp_device_descr *devicep, size_t mapnum,
if (k->refcount == 0)
{
splay_tree_remove (&devicep->mem_map, k);
if (k->link_key)
splay_tree_insert (&devicep->mem_map,
(splay_tree_node) k->link_key);
if (k->tgt->refcount > 1)
k->tgt->refcount--;
else

63
libgomp/testsuite/libgomp.c/target-link-1.c Normal file
View File

@ -0,0 +1,63 @@
struct S { int s, t; };
int a = 1, b = 1;
double c[27];
struct S d = { 8888, 8888 };
#pragma omp declare target link (a) to (b) link (c, d)
int
foo (void)
{
return a++ + b++;
}
int
bar (int n)
{
int *p1 = &a;
int *p2 = &b;
c[n] += 2.0;
d.s -= 2;
d.t -= 2;
return *p1 + *p2 + d.s + d.t;
}
#pragma omp declare target (foo, bar)
int
main ()
{
a = b = 2;
d.s = 17;
d.t = 18;
int res, n = 10;
#pragma omp target map (to: a, b, c, d) map (from: res)
{
res = foo () + foo ();
c[n] = 3.0;
res += bar (n);
}
int shared_mem = 0;
#pragma omp target map (alloc: shared_mem)
shared_mem = 1;
if ((shared_mem && res != (2 + 2) + (3 + 3) + (4 + 4 + 15 + 16))
|| (!shared_mem && res != (2 + 1) + (3 + 2) + (4 + 3 + 15 + 16)))
__builtin_abort ();
#pragma omp target enter data map (to: c)
#pragma omp target update from (c)
res = (int) (c[n] + 0.5);
if ((shared_mem && res != 5) || (!shared_mem && res != 0))
__builtin_abort ();
#pragma omp target map (to: a, b) map (from: res)
res = foo ();
if ((shared_mem && res != 4 + 4) || (!shared_mem && res != 2 + 3))
__builtin_abort ();
return 0;
}