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f87990a2a8
gcc/libgomp
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Tom de Vries f87990a2a8 [openmp, simt] Disable SIMT for user-defined reduction 
The test-case included in this patch contains this target region:
...
  for (int i0 = 0 ; i0 < N0 ; i0++ )
    counter_N0.i += 1;
...

When running with nvptx accelerator, the counter variable is expected to
be N0 after the region, but instead is N0 / 32.  The problem is that rather
than getting the result for all warp lanes, we get it for just one lane.

This is caused by the implementation of SIMT being incomplete.  It handles
regular reductions, but appearantly not user-defined reductions.

For now, handle this by disabling SIMT in this case, specifically by setting
sctx->max_vf to 1.

Tested libgomp on x86_64-linux with nvptx accelerator.

gcc/ChangeLog:

2021-05-03  Tom de Vries  <tdevries@suse.de>

	PR target/100321
	* omp-low.c (lower_rec_input_clauses): Disable SIMT for user-defined
	reduction.

libgomp/ChangeLog:

2021-05-03  Tom de Vries  <tdevries@suse.de>

	PR target/100321
	* testsuite/libgomp.c/target-44.c: New test.
2021-05-03 23:13:59 +02:00
..
config libgomp/i386: Revert the type of syscall wrappers output back to long. 2021-02-12 00:07:56 +01:00
plugin libgomp HSA/GCN plugins: don't prepend the 'HSA_RUNTIME_LIB' path to 'libhsa-runtime64.so' 2021-03-25 14:11:50 +01:00
testsuite [openmp, simt] Disable SIMT for user-defined reduction 2021-05-03 23:13:59 +02:00
.gitattributes libgomp: Fixes + cleanup for OpenACC's Fortran module + openacc_lib.h 2020-02-19 09:13:44 +01:00
acc_prof.h Update copyright years. 2021-01-04 10:26:59 +01:00
acinclude.m4 re PR other/79543 (Inappropriate "ld --version" checking) 2019-09-03 14:10:26 +00:00
aclocal.m4 libgomp: Regenerate configure files with automake 1.15.1 2020-10-02 12:08:47 +02:00
affinity-fmt.c Update copyright years. 2021-01-04 10:26:59 +01:00
affinity.c Update copyright years. 2021-01-04 10:26:59 +01:00
alloc.c Update copyright years. 2021-01-04 10:26:59 +01:00
allocator.c Update copyright years. 2021-01-04 10:26:59 +01:00
atomic.c Update copyright years. 2021-01-04 10:26:59 +01:00
barrier.c Update copyright years. 2021-01-04 10:26:59 +01:00
ChangeLog Daily bump. 2021-05-01 00:16:28 +00:00
ChangeLog.graphite
config.h.in offload-defaulted: Config option to silently ignore uninstalled offload compilers 2021-04-28 18:46:47 +02:00
configure offload-defaulted: Config option to silently ignore uninstalled offload compilers 2021-04-28 18:46:47 +02:00
configure.ac offload-defaulted: Config option to silently ignore uninstalled offload compilers 2021-04-28 18:46:47 +02:00
configure.tgt libgomp: enable linux-futex on riscv64 2021-01-18 15:13:48 +01:00
critical.c Update copyright years. 2021-01-04 10:26:59 +01:00
env.c Update copyright years. 2021-01-04 10:26:59 +01:00
error.c Update copyright years. 2021-01-04 10:26:59 +01:00
fortran.c openmp: Add support for the OpenMP 5.0 task detach clause 2021-01-16 12:58:13 -08:00
hashtab.h Update copyright years. 2021-01-04 10:26:59 +01:00
icv-device.c Update copyright years. 2021-01-04 10:26:59 +01:00
icv.c Update copyright years. 2021-01-04 10:26:59 +01:00
iter_ull.c Update copyright years. 2021-01-04 10:26:59 +01:00
iter.c Update copyright years. 2021-01-04 10:26:59 +01:00
libgomp_f.h.in Update copyright years. 2021-01-04 10:26:59 +01:00
libgomp_g.h openmp: Add support for the OpenMP 5.0 task detach clause 2021-01-16 12:58:13 -08:00
libgomp-plugin.c Update copyright years. 2021-01-04 10:26:59 +01:00
libgomp-plugin.h Update copyright years. 2021-01-04 10:26:59 +01:00
libgomp.h openmp: Fix intermittent hanging of task-detach-6 libgomp tests [PR98738] 2021-02-25 14:47:11 -08:00
libgomp.map openmp: Add support for the OpenMP 5.0 task detach clause 2021-01-16 12:58:13 -08:00
libgomp.spec.in Generally link to libgomp for -ftree-parallelize-loops=*. 2013-11-07 16:07:34 +01:00
libgomp.texi libgomp: Add documentation for omp_fulfill_event runtime function 2021-01-25 09:58:51 -08:00
lock.c Update copyright years. 2021-01-04 10:26:59 +01:00
loop_ull.c Update copyright years. 2021-01-04 10:26:59 +01:00
loop.c Update copyright years. 2021-01-04 10:26:59 +01:00
Makefile.am openmp: Mark deprecated symbols in OpenMP 5.0 2020-11-05 10:32:56 -08:00
Makefile.in offload-defaulted: Config option to silently ignore uninstalled offload compilers 2021-04-28 18:46:47 +02:00
oacc-async.c Update copyright years. 2021-01-04 10:26:59 +01:00
oacc-cuda.c Update copyright years. 2021-01-04 10:26:59 +01:00
oacc-host.c Update copyright years. 2021-01-04 10:26:59 +01:00
oacc-init.c Update copyright years. 2021-01-04 10:26:59 +01:00
oacc-int.h Update copyright years. 2021-01-04 10:26:59 +01:00
oacc-mem.c Update copyright years. 2021-01-04 10:26:59 +01:00
oacc-parallel.c Update copyright years. 2021-01-04 10:26:59 +01:00
oacc-plugin.c Update copyright years. 2021-01-04 10:26:59 +01:00
oacc-plugin.h Update copyright years. 2021-01-04 10:26:59 +01:00
oacc-profiling.c Update copyright years. 2021-01-04 10:26:59 +01:00
oacc-target.c GCN libgomp port 2019-11-13 12:38:04 +00:00
omp_lib.f90.in openmp: Add support for the OpenMP 5.0 task detach clause 2021-01-16 12:58:13 -08:00
omp_lib.h.in openmp: Add support for the OpenMP 5.0 task detach clause 2021-01-16 12:58:13 -08:00
omp.h.in openmp: Add support for the OpenMP 5.0 task detach clause 2021-01-16 12:58:13 -08:00
openacc_lib.h Update copyright years. 2021-01-04 10:26:59 +01:00
openacc.f90 Update copyright years. 2021-01-04 10:26:59 +01:00
openacc.h Update copyright years. 2021-01-04 10:26:59 +01:00
ordered.c Update copyright years. 2021-01-04 10:26:59 +01:00
parallel.c Update copyright years. 2021-01-04 10:26:59 +01:00
priority_queue.c openmp: Add support for the OpenMP 5.0 task detach clause 2021-01-16 12:58:13 -08:00
priority_queue.h openmp: Add support for the OpenMP 5.0 task detach clause 2021-01-16 12:58:13 -08:00
sections.c Update copyright years. 2021-01-04 10:26:59 +01:00
secure_getenv.h Update copyright years. 2021-01-04 10:26:59 +01:00
single.c Update copyright years. 2021-01-04 10:26:59 +01:00
splay-tree.c Update copyright years. 2021-01-04 10:26:59 +01:00
splay-tree.h Update copyright years. 2021-01-04 10:26:59 +01:00
target.c offload-defaulted: Config option to silently ignore uninstalled offload compilers 2021-04-28 18:46:47 +02:00
task.c openmp: Fix intermittent hanging of task-detach-6 libgomp tests [PR98738] 2021-02-25 14:47:11 -08:00
taskloop.c Update copyright years. 2021-01-04 10:26:59 +01:00
team.c libgomp: Silence false positive -Wmaybe-uninitialized warning [PR99984] 2021-04-09 10:18:47 +02:00
teams.c Update copyright years. 2021-01-04 10:26:59 +01:00
work.c Update copyright years. 2021-01-04 10:26:59 +01:00