[OpenMP][Tests][NFC] Mark unsupported libomp tests for GCC

This patch properly marks the support level for libomp test when testing with
GCC.

Some new OpenMP features were only introduced with GCC 11.
Tests using the target construct are incompatibe with GCC.

Tests pass now with GCC 10, 11, 12

Author: jprotze

openmp/runtime/test/parallel/bug54082.c

@@ -1,6 +1,10 @@
 // This test is adapted from test_parallel_for_allocate.c in SOLLVE V&V.
 // https://github.com/SOLLVE/sollve_vv/blob/master/tests/5.0/parallel_for/test_parallel_for_allocate.c
 // RUN: %libomp-compile-and-run
+
+// Support for allocate was added in GCC 11
+// UNSUPPORTED: gcc-4, gcc-5, gcc-6, gcc-7, gcc-8, gcc-9, gcc-10
+
 #include <omp.h>
 
 #include <assert.h>

openmp/runtime/test/parallel/omp_parallel_if.c

@@ -1,5 +1,9 @@
 // RUN: %libomp-compile-and-run
 // RUN: %libomp-irbuilder-compile-and-run
+
+// irbuilder is only available with clang
+// REQUIRES: clang
+
 #include <stdio.h>
 #include "omp_testsuite.h"
 

openmp/runtime/test/tasking/hidden_helper_task/single_helper_thread.c

@@ -1,5 +1,8 @@
 // RUN: %libomp-compile && env LIBOMP_NUM_HIDDEN_HELPER_THREADS=1 %libomp-run
 
+// gcc/icc target offloading is incompatible with libomp
+// UNSUPPORTED: icc, gcc
+
 // The test checks that "devide-by-0" bug fixed in runtime.
 // The fix is to increment number of threads by 1 if positive,
 // so that operation

openmp/runtime/test/teams/teams-distr-on-host.c

@@ -2,7 +2,9 @@
 // It checks that the bug in implementation of distribute construct is fixed.
 
 // RUN: %libomp-compile-and-run
-// UNSUPPORTED: icc
+
+// gcc/icc target offloading is incompatible with libomp
+// UNSUPPORTED: icc, gcc
 
 #include <stdio.h>
 #include <omp.h>

openmp/runtime/test/teams/teams_resize.c

@@ -1,5 +1,7 @@
 // RUN: %libomp-compile && env OMP_DYNAMIC=true KMP_DYNAMIC_MODE=random %libomp-run
-// UNSUPPORTED: icc
+
+// gcc/icc target offloading is incompatible with libomp
+// UNSUPPORTED: icc, gcc
 
 // This is a super simple unit test to see that teams behave properly when
 // parallel regions inside the teams construct cannot allocate teams of

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

@@ -1,5 +1,8 @@
 // RUN: %libomp-compile-and-run
 
+// Support for collapse of non-rectangular loop nests was added in GCC 11
+// UNSUPPORTED: gcc-4, gcc-5, gcc-6, gcc-7, gcc-8, gcc-9, gcc-10
+
 #include <stdio.h>
 
 #define N 3

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

@@ -1,5 +1,8 @@
 // RUN: %libomp-compile-and-run
 
+// Support for collapse of non-rectangular loop nests was added in GCC 11
+// UNSUPPORTED: gcc-4, gcc-5, gcc-6, gcc-7, gcc-8, gcc-9, gcc-10
+
 #define N 10
 int arr[N][N][N];