OpenACC: Avoid ICE in type-cast 'async', 'wait' clauses

2020-04-23  Andrew Stubbs  <ams@codesourcery.com>
	    Thomas Schwinge  <thomas@codesourcery.com>

	PR middle-end/93488

	gcc/
	* omp-expand.c (expand_omp_target): Use force_gimple_operand_gsi on
	t_async and the wait arguments.

	gcc/testsuite/
	* c-c++-common/goacc/pr93488.c: New file.

Reviewed-by: Thomas Schwinge <thomas@codesourcery.com>

gcc/ChangeLog

+2020-04-23  Andrew Stubbs  <ams@codesourcery.com>
+	    Thomas Schwinge  <thomas@codesourcery.com>
+
+	PR middle-end/93488
+
+	* omp-expand.c (expand_omp_target): Use force_gimple_operand_gsi on
+	t_async and the wait arguments.
+
 2020-04-23  Richard Sandiford  <richard.sandiford@arm.com>
 
 	PR tree-optimization/94727

gcc/omp-expand.c

@@ -8418,7 +8418,9 @@ expand_omp_target (struct omp_region *region)
 					      i_async));
 	  }
 	if (t_async)
-	  args.safe_push (t_async);
+	  args.safe_push (force_gimple_operand_gsi (&gsi, t_async, true,
+						    NULL_TREE, true,
+						    GSI_SAME_STMT));
 
 	/* Save the argument index, and ... */
 	unsigned t_wait_idx = args.length ();
@@ -8431,9 +8433,12 @@ expand_omp_target (struct omp_region *region)
 	for (; c; c = OMP_CLAUSE_CHAIN (c))
 	  if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_WAIT)
 	    {
-	      args.safe_push (fold_convert_loc (OMP_CLAUSE_LOCATION (c),
-						integer_type_node,
-						OMP_CLAUSE_WAIT_EXPR (c)));
+	      tree arg = fold_convert_loc (OMP_CLAUSE_LOCATION (c),
+					   integer_type_node,
+					   OMP_CLAUSE_WAIT_EXPR (c));
+	      arg = force_gimple_operand_gsi (&gsi, arg, true, NULL_TREE, true,
+					      GSI_SAME_STMT);
+	      args.safe_push (arg);
 	      num_waits++;
 	    }
 

gcc/testsuite/ChangeLog

+2020-04-23  Andrew Stubbs  <ams@codesourcery.com>
+	    Thomas Schwinge  <thomas@codesourcery.com>
+
+	PR middle-end/93488
+
+	* c-c++-common/goacc/pr93488.c: New file.
+
 2020-04-23  Richard Sandiford  <richard.sandiford@arm.com>
 
 	PR tree-optimization/94727

gcc/testsuite/c-c++-common/goacc/pr93488.c

+/* PR middle-end/93488
+ 
+   Ensure that wait and async arguments can be cast to the correct type
+   without breaking gimple verification.  */
+
+void test()
+{
+  /* int */ unsigned char a = 1;
+  /* int */ unsigned char w = 1;
+
+#pragma acc parallel wait(w) async(a)
+  ;
+#pragma acc kernels wait(w) async(a)
+  ;
+#pragma acc serial wait(w) async(a)
+  ;
+  int data = 0;
+#pragma acc enter data wait(w) async(a) create(data)
+#pragma acc update wait(w) async(a) device(data)
+#pragma acc exit data wait(w) async(a) delete(data)
+#pragma acc wait(w) async(a)
+}