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

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