re PR middle-end/35611 (FAIL: libgomp.c/omp-nested-1.c execution test)

	PR middle-end/35611
	* gimplify.c (gimplify_expr): Gimplify second operand of
	OMP_ATOMIC_LOAD.

	* testsuite/libgomp.c/atomic-4.c: New test.

From-SVN: r133309

gcc/ChangeLog

+2008-03-18  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/35611
+	* gimplify.c (gimplify_expr): Gimplify second operand of
+	OMP_ATOMIC_LOAD.
+
 2008-03-17  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/19637

gcc/gimplify.c

@@ -6022,12 +6022,18 @@ gimplify_expr (tree *expr_p, tree *pre_p, tree *post_p,
 
 	case OMP_RETURN:
 	case OMP_CONTINUE:
-        case OMP_ATOMIC_LOAD:
-        case OMP_ATOMIC_STORE:
-
+	case OMP_ATOMIC_STORE:
 	  ret = GS_ALL_DONE;
 	  break;
 
+	case OMP_ATOMIC_LOAD:
+	  if (gimplify_expr (&TREE_OPERAND (*expr_p, 1), pre_p, NULL,
+	      is_gimple_val, fb_rvalue) != GS_ALL_DONE)
+	    ret = GS_ERROR;
+	  else
+	    ret = GS_ALL_DONE;
+	  break;
+
 	case POINTER_PLUS_EXPR:
           /* Convert ((type *)A)+offset into &A->field_of_type_and_offset.
 	     The second is gimple immediate saving a need for extra statement.

libgomp/ChangeLog

 2008-03-18  Jakub Jelinek  <jakub@redhat.com>
 
+	PR middle-end/35611
+	* testsuite/libgomp.c/atomic-4.c: New test.
+
 	PR libgomp/35625
 	* iter.c (gomp_iter_guided_next_locked): If q > n, set end to ws->end.
 	(gomp_iter_guided_next): Likewise.

libgomp/testsuite/libgomp.c/atomic-4.c

+/* PR middle-end/35611 */
+/* { dg-options "-O2" } */
+
+extern void abort (void);
+
+int
+main (void)
+{
+  long double d = .0L;
+  int i;
+  #pragma omp parallel for shared (d)
+    for (i = 0; i < 1000; i++)
+      #pragma omp atomic
+	d += 1.0L;
+  if (d != 1000.0L)
+    abort ();
+  return 0;
+}