gcc/testsuite/gcc.dg/fold-bitand-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-fdump-tree-original" } */
   3
   4 char c1 __attribute__ ((aligned (1)));
   5 char c2 __attribute__ ((aligned (2)));
   6 char c4 __attribute__ ((aligned (4)));
   7 char c8 __attribute__ ((aligned (8)));
   8
   9 unsigned f1(void)
  10 {
  11   return 3 & (__SIZE_TYPE__)&c1;
  12 }
  13
  14 unsigned f2(void)
  15 {
  16   return 3 & (__SIZE_TYPE__)&c2;
  17 }
  18
  19 unsigned f3(void)
  20 {
  21   return 3 & (__SIZE_TYPE__)&c4;
  22 }
  23
  24 unsigned f4(void)
  25 {
  26   return 3 & (__SIZE_TYPE__)&c8;
  27 }
  28
  29 /* { dg-final { scan-tree-dump-times "\&c1 \& 3" 1 "original" } } */
  30 /* { dg-final { scan-tree-dump-times "\&c2 \& 3" 1 "original" } } */
  31 /* { dg-final { scan-tree-dump-times "\&c4 \& 3" 0 "original" } } */
  32 /* { dg-final { scan-tree-dump-times "\&c8 \& 3" 0 "original" } } */
  33 /* { dg-final { scan-tree-dump-times "return 0" 2 "original" } } */
  34 /* { dg-final { cleanup-tree-dump "original" } } */