1 files changed, 23 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/ctz-ch.c b/gcc/testsuite/gcc.dg/tree-ssa/ctz-ch.c
new file mode 100644
index 0000000..5d72597
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/ctz-ch.c
@@ -0,0 +1,23 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-optimized" } */
+
+typedef unsigned long BITMAP_WORD;
+
+bool
+bmp_iter_set (BITMAP_WORD bits, unsigned *bit_no)
+{
+  /* If our current word is nonzero, it contains the bit we want.  */
+  if (bits)
+    {
+      while (!(bits & 1))
+	{
+	  bits >>= 1;
+	  *bit_no += 1;
+	}
+      return true;
+    }
+
+  return false;
+}
+
+/* { dg-final { scan-tree-dump-times "__builtin_ctz|\\.CTZ" 1 "optimized" } } */