[gcc r13-5006] openmp: Fix up finish_omp_target_clauses [PR108286]

[Jakub Jelinek <jakub@gcc.gnu.org>]

https://gcc.gnu.org/g:29c3218618ef6177dc33871b26c8fbd9b21eabe1

commit r13-5006-g29c3218618ef6177dc33871b26c8fbd9b21eabe1
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Thu Jan 5 11:57:30 2023 +0100

    openmp: Fix up finish_omp_target_clauses [PR108286]
    
    The comment in the loop says that we shouldn't add a map clause if such
    a clause exists already, but the loop was actually using OMP_CLAUSE_DECL
    on any clause.  Target construct can have various clauses which don't
    have OMP_CLAUSE_DECL at all (e.g. nowait, device or if) or clause
    where it means something different (e.g. privatization clauses, allocate,
    depend).
    
    So, only check OMP_CLAUSE_DECL on OMP_CLAUSE_MAP clauses.
    
    2023-01-05  Jakub Jelinek  <jakub@redhat.com>
    
            PR c++/108286
            * semantics.cc (finish_omp_target_clauses): Ignore clauses other than
            OMP_CLAUSE_MAP.
    
            * testsuite/libgomp.c++/pr108286.C: New test.

Diff:
---
 gcc/cp/semantics.cc                      |  4 +++-
 libgomp/testsuite/libgomp.c++/pr108286.C | 29 +++++++++++++++++++++++++++++
 2 files changed, 32 insertions(+), 1 deletion(-)

diff --git a/gcc/cp/semantics.cc b/gcc/cp/semantics.cc
index ab52e56d6c1..ef5bf2430b1 100644
--- a/gcc/cp/semantics.cc
+++ b/gcc/cp/semantics.cc
@@ -9825,7 +9825,9 @@ finish_omp_target_clauses (location_t loc, tree body, tree *clauses_ptr)
 
 	for (tree c = *clauses_ptr; c; c = OMP_CLAUSE_CHAIN (c))
 	  {
-	    /* If map(this->ptr[:N] already exists, avoid creating another
+	    if (OMP_CLAUSE_CODE (c) != OMP_CLAUSE_MAP)
+	      continue;
+	    /* If map(this->ptr[:N]) already exists, avoid creating another
 	       such map.  */
 	    tree decl = OMP_CLAUSE_DECL (c);
 	    if ((TREE_CODE (decl) == INDIRECT_REF
diff --git a/libgomp/testsuite/libgomp.c++/pr108286.C b/libgomp/testsuite/libgomp.c++/pr108286.C
new file mode 100644
index 00000000000..ee88c2f9fd0
--- /dev/null
+++ b/libgomp/testsuite/libgomp.c++/pr108286.C
@@ -0,0 +1,29 @@
+// PR c++/108286
+// { dg-do run }
+
+struct S {
+  int
+  foo ()
+  {
+    int res = 0;
+#pragma omp target map(size, ptr[:size], res) nowait
+    res = ptr[size - 1];
+#pragma omp taskwait
+    return res;
+  }
+
+  unsigned size;
+  int *ptr;
+};
+
+int
+main ()
+{
+  S s;
+  int buf[5];
+  s.size = 5;
+  s.ptr = buf;
+  buf[4] = 42;
+  if (s.foo () != 42)
+    __builtin_abort ();
+}