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Andrew Stubbs 6f51395197 libgomp: disable barriers in nested teams 
Both GCN and NVPTX allow nested parallel regions, but the barrier
implementation did not allow the nested teams to run independently of each
other (due to hardware limitations).  This patch fixes that, under the
assumption that each thread will create a new subteam of one thread, by
simply not using barriers when there's no other thread to synchronise.

libgomp/ChangeLog:

	* config/gcn/bar.c (gomp_barrier_wait_end): Skip the barrier if the
	total number of threads is one.
	(gomp_team_barrier_wake): Likewise.
	(gomp_team_barrier_wait_end): Likewise.
	(gomp_team_barrier_wait_cancel_end): Likewise.
	* config/nvptx/bar.c (gomp_barrier_wait_end): Likewise.
	(gomp_team_barrier_wake): Likewise.
	(gomp_team_barrier_wait_end): Likewise.
	(gomp_team_barrier_wait_cancel_end): Likewise.
	* testsuite/libgomp.c-c++-common/nested-parallel-unbalanced.c: New test.
 		2020-09-29 11:48:04 +01:00
..
alloc-1.c openmp: Add basic library allocator support. 2020-05-19 10:11:01 +02:00
alloc-2.c libgomp: Add Fortran routine support for allocators 2020-07-15 08:33:20 +02:00
alloc-3.c openmp: Add basic library allocator support. 2020-05-19 10:11:01 +02:00
alloc-4.c openmp: omp_alloc(0, ...) should return NULL. 2020-05-30 14:02:56 +02:00
atomic-18.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
cancel-parallel-1.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
cancel-taskgroup-1.c
…
cancel-taskgroup-2.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
cancel-taskgroup-3.c re PR libgomp/87995 (libgomp.c/../libgomp.c-c++-common/cancel-taskgroup-3.c fails consistently after r265930) 2018-12-08 09:58:24 +01:00
cancel-taskgroup-4.c omp-low.c (check_omp_nesting_restrictions): Allow cancel or cancellation point with taskgroup clause inside of taskloop. 2018-12-02 13:48:42 +01:00
critical-hint-1.c critical-hint-*.{c,f90}: Move from gcc/testsuite to libgomp/testsuite 2020-07-22 12:14:22 +02:00
critical-hint-2.c critical-hint-*.{c,f90}: Move from gcc/testsuite to libgomp/testsuite 2020-07-22 12:14:22 +02:00
depend-iterator-1.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
depend-iterator-2.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
depend-mutexinout-1.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
depend-mutexinout-2.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
depobj-1.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
display-affinity-1.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
for-1.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
for-1.h [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
for-2.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
for-2.h openmp: Handle reduction clauses on host teams construct [PR96459] 2020-08-05 10:40:10 +02:00
for-3.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
for-4.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
for-5.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
for-6.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
for-7.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
for-8.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
for-9.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
for-10.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
for-11.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
for-12.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
for-13.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
for-14.c openmp: Handle reduction clauses on host teams construct [PR96459] 2020-08-05 10:40:10 +02:00
for-15.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
for-16.c omp-builtins.def (BUILT_IN_GOMP_LOOP_NONMONOTONIC_RUNTIME_START, [...]): Fix up function types - remove one argument. 2018-12-12 23:47:55 +01:00
function-not-offloaded-aux.c [offloading] Error on missing symbols 2018-12-14 13:48:56 +00:00
function-not-offloaded.c [gcn] Set 'UI_NONE' for 'TARGET_EXCEPT_UNWIND_INFO' [PR94282] 2020-04-29 09:39:03 +02:00
lastprivate-conditional-1.c tree-core.h (enum omp_clause_code): Add OMP_CLAUSE__CONDTEMP_. 2019-05-24 23:31:59 +02:00
lastprivate-conditional-2.c tree-core.h (enum omp_clause_code): Add OMP_CLAUSE__CONDTEMP_. 2019-05-24 23:31:59 +02:00
lastprivate-conditional-3.c omp-low.c (lower_omp_1): Look through ordered... 2019-05-27 23:31:40 +02:00
lastprivate-conditional-4.c gimplify.c (struct gimplify_omp_ctx): Add clauses member. 2019-05-29 09:51:43 +02:00
lastprivate-conditional-5.c gimplify.c (struct gimplify_omp_ctx): Add clauses member. 2019-05-29 09:51:43 +02:00
lastprivate-conditional-6.c gimplify.c (struct gimplify_omp_ctx): Add clauses member. 2019-05-29 09:51:43 +02:00
lastprivate-conditional-7.c gimplify.c (gimplify_scan_omp_clauses): Don't sorry_at on lastprivate conditional on combined for simd. 2019-06-04 14:49:03 +02:00
lastprivate-conditional-8.c gimplify.c (gimplify_scan_omp_clauses): Don't sorry_at on lastprivate conditional on combined for simd. 2019-06-04 14:49:03 +02:00
lastprivate-conditional-9.c gimplify.c (gimplify_scan_omp_clauses): Don't sorry_at on lastprivate conditional on combined for simd. 2019-06-04 14:49:03 +02:00
lastprivate-conditional-10.c gimplify.c (gimplify_scan_omp_clauses): Don't sorry_at on lastprivate conditional on combined for simd. 2019-06-04 14:49:03 +02:00
loop-1.c tree.def (OMP_LOOP): New tree code. 2019-07-20 13:21:42 +02:00
loop-13.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
loop-14.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
loop-15.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
master-combined-1.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
monotonic-1.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
monotonic-2.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
nested-parallel-unbalanced.c libgomp: disable barriers in nested teams 2020-09-29 11:48:04 +01:00
nonmonotonic-1.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
nonmonotonic-2.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
ordered-4.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
pause-1.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
pause-2.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
pr45784.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
pr64824.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
pr64868.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
pr66199-1.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
pr66199-2.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
pr66199-3.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
pr66199-4.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
pr66199-5.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
pr66199-6.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
pr66199-7.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
pr66199-8.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
pr66199-9.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
pr66199-10.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
pr66199-11.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
pr66199-12.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
pr66199-13.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
pr66199-14.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
pr69389.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
pr81875.c
…
pr83046.c
…
pr93515.c openmp: Fix handling of non-addressable shared scalars in parallel nested inside of target [PR93515] 2020-02-06 09:19:08 +01:00
pr96390.c OpenMP: Handle cpp_implicit_alias in declare-target discovery (PR96390) 2020-09-28 18:08:05 +02:00
reduction-16.c [libgomp, nvptx] Add __sync_compare_and_swap_16 2020-09-14 08:28:56 +02:00
simd-1.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
simd-14.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
simd-15.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
simd-16.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
simd-17.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
target-1.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
target-2.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
target-10.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
target-13.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
target-40.c openmp: Also implicitly mark as declare target to functions mentioned in target regions 2020-05-14 09:48:32 +02:00
task-reduction-1.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
task-reduction-2.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
task-reduction-3.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
task-reduction-4.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
task-reduction-5.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
task-reduction-6.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
task-reduction-7.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
task-reduction-8.c task-reduction-8.c (bar): Add in_reduction clause for s[0]. 2018-11-08 20:38:21 +01:00
task-reduction-9.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
task-reduction-11.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
task-reduction-12.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
task-reduction-13.c workshare-reduction-1.c: New test. 2018-11-09 14:02:50 +01:00
task-reduction-14.c workshare-reduction-1.c: New test. 2018-11-09 14:02:50 +01:00
taskgroup-1.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
taskloop-1.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
taskloop-2.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
taskloop-3.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
taskloop-4.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
taskloop-reduction-1.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
taskloop-reduction-2.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
taskloop-reduction-3.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
taskloop-reduction-4.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
taskwait-depend-1.c builtin-types.def (BT_FN_VOID_BOOL, [...]): New. 2018-11-08 18:13:04 +01:00
udr-1.c [libgomp, testsuite] Move tests to libgomp.c-c++-common 2018-05-02 17:53:43 +00:00
unmap-infinity-2.c OpenACC reference count overhaul 2019-12-20 01:20:16 +00:00
variable-not-offloaded.c [offloading] Error on missing symbols 2018-12-14 13:48:56 +00:00