--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/fold-bitand-1.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,32 @@
+/* { dg-do compile } */
+/* { dg-options "-w -fdump-tree-original" } */
+
+char c1 __attribute__ ((aligned (1)));
+char c2 __attribute__ ((aligned (2)));
+char c4 __attribute__ ((aligned (4)));
+char c8 __attribute__ ((aligned (8))); 
+unsigned f1(void)
+{
+  return 3 & (__SIZE_TYPE__)&c1;
+}
+
+unsigned f2(void)
+{
+  return 3 & (__SIZE_TYPE__)&c2;
+}
+
+unsigned f3(void)
+{
+  return 3 & (__SIZE_TYPE__)&c4;
+}
+
+unsigned f4(void)
+{
+  return 3 & (__SIZE_TYPE__)&c8;
+}
+
+/* { dg-final { scan-tree-dump-times "\&c1 \& 3" 1 "original" } } */
+/* { dg-final { scan-tree-dump-times "\&c2 \& 3" 1 "original" } } */
+/* { dg-final { scan-tree-dump-times "\&c4 \& 3" 0 "original" } } */
+/* { dg-final { scan-tree-dump-times "\&c8 \& 3" 0 "original" } } */
+/* { dg-final { scan-tree-dump-times "return 0" 2 "original" } } */