[OpenMP][Tests] Flag compatibility of OpenMP runtime tests with GCC versions

[protze.joachim]

Summary

Some of the recently added tests are not compatible with GCC. Also checked compatibility with GCC 10

If the compilation fails, the test is marked as unsupported.
-> This will never change for a specific version of gcc

If the linking fails, the test is marked as expected to fail.
-> This might change as LLVM/OpenMP implements the missing GOMP interface function

I successfully ran make check-libomp with GCC versions 6-10
Issues with the OMPT tests are addressed in D82267

[protze.joachim]

In other tests we start gcc versions with gcc-4.
I added those flags for the task reduction case without explicitly testing gcc-4/gcc-5

[protze.joachim]

I have no idea, what Harbormaster is trying to tell me.

https://buildkite.com/llvm-project/premerge-checks/builds/2535#_

shows a failure in ninja all, but the only information about the command is in the artifact, which shows [4042/4042] successfully built targets.

[saiislam]

In D83077#2130159, @protze.joachim wrote:

I have no idea, what Harbormaster is trying to tell me.

https://buildkite.com/llvm-project/premerge-checks/builds/2535#_

shows a failure in ninja all, but the only information about the command is in the artifact, which shows [4042/4042] successfully built targets.

I am also seeing the same behavior for D82963 with no idea about the underlying issue.
https://buildkite.com/llvm-project/premerge-checks/builds/2519

[Hahnfeld]

LGTM

openmp/runtime/test/tasking/omp_detach_taskwait.c

 // RUN: %libomp-compile -fopenmp-version=50 && env OMP_NUM_THREADS='3' %libomp-run
 // RUN: %libomp-compile -fopenmp-version=50 && env OMP_NUM_THREADS='1' %libomp-run
 
-// Checked gcc 9.2 still does not support detach clause on task construct.
-// UNSUPPORTED: gcc-4, gcc-5, gcc-6, gcc-7, gcc-8, gcc-9
+// Checked gcc 10.1 still does not support detach clause on task construct.
+// UNSUPPORTED: gcc-4, gcc-5, gcc-6, gcc-7, gcc-8, gcc-9, gcc-10
 // clang supports detach clause since version 11.
 // UNSUPPORTED: clang-10, clang-9, clang-8, clang-7
 // icc compiler does not support detach clause.
 // UNSUPPORTED: icc
 
 #include <omp.h>
 
 int main()

openmp/runtime/test/tasking/omp_task_red_taskloop.c

 // RUN: %libomp-compile-and-run
 
+// Parsing error until gcc8:
+// UNSUPPORTED: gcc-6, gcc-7, gcc-8
+
+// Missing GOMP_taskgroup_reduction_(un)register in LLVM/OpenMP
+// Should be removed once the functions are implemented
+// XFAIL gcc-9, gcc-10
+
 #include <stdio.h>
 #include <omp.h>
 
 int r;
 
 int work(int k, int l)
 {
   return k + l + 1;

openmp/runtime/test/worksharing/for/bug_set_schedule_0.c

 // RUN: %libomp-compile-and-run
+
+// gcc 9/10 use GOMP_parallel_loop_maybe_nonmonotonic_runtime, not implemented
+// Should be removed once the functions are implemented
+// XFAIL: gcc-9, gcc-10
+
 #include <stdio.h>
 #include <omp.h>
 #include "omp_testsuite.h"
 
 /* Test that the chunk size is set to default (1) when
    chunk size <= 0 is specified */
 int a = 0;
 

openmp/runtime/test/worksharing/for/omp_for_schedule_runtime.c

 // RUN: %libomp-compile
 // RUN: env OMP_SCHEDULE=static %libomp-run 1 0
 // RUN: env OMP_SCHEDULE=static,10 %libomp-run 1 10
 // RUN: env OMP_SCHEDULE=dynamic %libomp-run 2 1
 // RUN: env OMP_SCHEDULE=dynamic,11 %libomp-run 2 11
 // RUN: env OMP_SCHEDULE=guided %libomp-run 3 1
 // RUN: env OMP_SCHEDULE=guided,12 %libomp-run 3 12
 // RUN: env OMP_SCHEDULE=auto %libomp-run 4 1
 // RUN: env OMP_SCHEDULE=trapezoidal %libomp-run 101 1
 // RUN: env OMP_SCHEDULE=trapezoidal,13 %libomp-run 101 13
 // RUN: env OMP_SCHEDULE=static_steal %libomp-run 102 1
 // RUN: env OMP_SCHEDULE=static_steal,14 %libomp-run 102 14
+
+// gcc 9/10 use GOMP_parallel_loop_maybe_nonmonotonic_runtime, not implemented
+// Should be removed once the functions are implemented
+// XFAIL: gcc-9, gcc-10
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
 #include "omp_testsuite.h"
 
 int sum;
 char* correct_kind_string;
 omp_sched_t correct_kind;

openmp/runtime/test/worksharing/for/omp_nonmonotonic_dynamic1.c

 // RUN: %libomp-compile
 // RUN: env OMP_SCHEDULE=nonmonotonic:dynamic,10 %libomp-run
 
+// gcc 9/10 use GOMP_parallel_loop_maybe_nonmonotonic_runtime, not implemented
+// Should be removed once the functions are implemented
+// XFAIL: gcc-9, gcc-10
+
 // The test checks iterations distribution for OMP 5.0 nonmonotonic OMP_SCHEDULE
 // case #threads > #chunks (fallback to monotonic dynamic)
 
 #include <stdio.h>
 #include <omp.h>
 
 #define ITERS 100
 #define CHUNK 10