[PR tree-optimization/78024] Clear basic block flags before using BB_VISITED for OpenACC loops processing

	gcc/
	* omp-low.c (oacc_loop_discovery): Call clear_bb_flags before, and
	don't clear BB_VISITED after processing.

	gcc/testsuite/
	* gcc.dg/goacc/loop-processing-1.c: New file.

From-SVN: r241334

1 files changed, 18 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/goacc/loop-processing-1.c b/gcc/testsuite/gcc.dg/goacc/loop-processing-1.c
new file mode 100644
index 0000000..619576a
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/goacc/loop-processing-1.c
@@ -0,0 +1,18 @@
+/* Make sure that OpenACC loop processing happens.  */
+/* { dg-additional-options "-O2 -fdump-tree-oaccdevlow" } */
+
+extern int place ();
+
+void vector_1 (int *ary, int size)
+{
+#pragma acc parallel num_workers (32) vector_length(32) copy(ary[0:size]) firstprivate (size)
+  {
+#pragma acc loop gang
+    for (int jx = 0; jx < 1; jx++)
+#pragma acc loop auto
+      for (int ix = 0; ix < size; ix++)
+	ary[ix] = place ();
+  }
+}
+
+/* { dg-final { scan-tree-dump {OpenACC loops.*Loop 0\(0\).*Loop 14\(1\).*\.data_dep\.[0-9_]+ = UNIQUE \(OACC_HEAD_MARK, 0, 1, 20\);.*Head-0:.*\.data_dep\.[0-9_]+ = UNIQUE \(OACC_HEAD_MARK, 0, 1, 20\);.*\.data_dep\.[0-9_]+ = UNIQUE \(OACC_FORK, \.data_dep\.[0-9_]+, 0\);.*Tail-0:.*\.data_dep\.[0-9_]+ = UNIQUE \(OACC_TAIL_MARK, \.data_dep\.[0-9_]+, 1\);.*\.data_dep\.[0-9_]+ = UNIQUE \(OACC_JOIN, \.data_dep\.[0-9_]+, 0\);.*Loop 6\(4\).*\.data_dep\.[0-9_]+ = UNIQUE \(OACC_HEAD_MARK, 0, 1, 6\);.*Head-0:.*\.data_dep\.[0-9_]+ = UNIQUE \(OACC_HEAD_MARK, 0, 1, 6\);.*\.data_dep\.[0-9_]+ = UNIQUE \(OACC_FORK, \.data_dep\.[0-9_]+, 2\);.*Tail-0:.*\.data_dep\.[0-9_]+ = UNIQUE \(OACC_TAIL_MARK, \.data_dep\.[0-9_]+, 1\);.*\.data_dep\.[0-9_]+ = UNIQUE \(OACC_JOIN, \.data_dep\.[0-9_]+, 2\);} "oaccdevlow" } } */