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author | Tom de Vries <tdevries@suse.de> | 2019-06-15 07:06:19 +0000 |
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committer | Tom de Vries <vries@gcc.gnu.org> | 2019-06-15 07:06:19 +0000 |
commit | 120a01d160cd47b4276507dc8f6c1ab571a9c006 (patch) | |
tree | 00e3daa8ac952df48b317271c3370dac780e62c7 /libgomp | |
parent | 2789efe3ee85f85ec83139fab6930cf2175be06a (diff) | |
download | gcc-120a01d160cd47b4276507dc8f6c1ab571a9c006.zip gcc-120a01d160cd47b4276507dc8f6c1ab571a9c006.tar.gz gcc-120a01d160cd47b4276507dc8f6c1ab571a9c006.tar.bz2 |
[openacc] Disable pass_thread_jumps for IFN_UNIQUE
If we compile the openacc testcase with -fopenacc -O2, we run into a SIGSEGV
or assert. The root cause for this is that pass_thread_jumps breaks the
invariant that OACC_FORK and OACC_JOIN mark the start and end of a
single-entry-single-exit region.
Fix this by bailing out when encountering an IFN_UNIQUE in
thread_jumps::profitable_jump_thread_path.
Bootstrapped and reg-tested on x86_64.
Build and reg-tested libgomp on x86_64 with nvptx accelerator.
2019-06-15 Tom de Vries <tdevries@suse.de>
PR tree-optimization/90009
* tree-ssa-threadbackward.c (thread_jumps::profitable_jump_thread_path):
Return NULL if bb contains IFN_UNIQUE.
* testsuite/libgomp.oacc-c-c++-common/pr90009.c: New test.
From-SVN: r272321
Diffstat (limited to 'libgomp')
-rw-r--r-- | libgomp/ChangeLog | 5 | ||||
-rw-r--r-- | libgomp/testsuite/libgomp.oacc-c-c++-common/pr90009.c | 34 |
2 files changed, 39 insertions, 0 deletions
diff --git a/libgomp/ChangeLog b/libgomp/ChangeLog index 35fe548..9a1fcff1f 100644 --- a/libgomp/ChangeLog +++ b/libgomp/ChangeLog @@ -1,3 +1,8 @@ +2019-06-15 Tom de Vries <tdevries@suse.de> + + PR tree-optimization/90009 + * testsuite/libgomp.oacc-c-c++-common/pr90009.c: New test. + 2019-06-13 Feng Xue <fxue@os.amperecomputing.com> PR tree-optimization/89713 diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/pr90009.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/pr90009.c new file mode 100644 index 0000000..58d1039 --- /dev/null +++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/pr90009.c @@ -0,0 +1,34 @@ +/* { dg-do run } */ + +#include <stdlib.h> + +#define N 100 + +int data[N]; + +int +main (void) +{ + int n = N, b = 3; +#pragma acc parallel num_workers(2) + { + int c; + if (n) + c = 0; + else + c = b; + +#pragma acc loop worker + for (int i = 0; i < n; i++) + data[i] = 1; + + if (c) + data[0] = 2; + } + + for (int i = 0; i < n; i++) + if (data[i] != 1) + abort (); + + return 0; +} |