gcc/testsuite/gcc.dg/fold-bitand-2.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-fdump-tree-original" } */
   3
   4 struct {
   5   char c1;
   6   char c2;
   7   char c3;
   8   char c4;
   9 } s __attribute__ ((aligned (4)));
  10
  11 unsigned f1 (void)
  12 {
  13   return 3 & (__SIZE_TYPE__)&s.c1;
  14 }
  15
  16 unsigned f2 (void)
  17 {
  18   return 3 & (__SIZE_TYPE__)&s.c2;
  19 }
  20
  21 unsigned f3 (void)
  22 {
  23   return 3 & (__SIZE_TYPE__)&s.c3;
  24 }
  25
  26 unsigned f4 (void)
  27 {
  28   return 3 & (__SIZE_TYPE__)&s.c4;
  29 }
  30
  31 unsigned f5 (void)
  32 {
  33   return 4 & (__SIZE_TYPE__)&s.c1;
  34 }
  35
  36 /* { dg-final { scan-tree-dump-times "\& 3" 0 "original" } } */
  37 /* { dg-final { scan-tree-dump-times "\& 4" 1 "original" } } */
  38 /* { dg-final { scan-tree-dump-times "return 0" 1 "original" } } */
  39 /* { dg-final { scan-tree-dump-times "return 1" 1 "original" } } */
  40 /* { dg-final { scan-tree-dump-times "return 2" 1 "original" } } */
  41 /* { dg-final { scan-tree-dump-times "return 3" 1 "original" } } */