gcc/testsuite/gcc.dg/fold-bitand-4.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-fdump-tree-original" } */
   3
   4 typedef char char4[4] __attribute__ ((aligned (4)));
   5 char4 c4[4] __attribute__ ((aligned (16)));
   6
   7 typedef char char16[16] __attribute__ ((aligned (16)));
   8 char16 c16[4] __attribute__ ((aligned (4)));
   9
  10 int f1 (void)
  11 {
  12   /* 12 */
  13   return 15 & (__SIZE_TYPE__)&c4[3];
  14 }
  15
  16 int f2 (int i)
  17 {
  18   /* Indeterminate */
  19   return 15 & (__SIZE_TYPE__)&c4[i];
  20 }
  21
  22 int f3 (int i)
  23 {
  24   /* 0 */
  25   return 3 & (__SIZE_TYPE__)&c4[i];
  26 }
  27
  28 int f4 (int i)
  29 {
  30   /* Indeterminate */
  31   return 7 & (__SIZE_TYPE__)&c16[i];
  32 }
  33
  34 int f5 (int i)
  35 {
  36   /* 0 */
  37   return 3 & (__SIZE_TYPE__)&c16[i];
  38 }
  39
  40 /* { dg-final { scan-tree-dump-times "return 12" 1 "original" } } */
  41 /* { dg-final { scan-tree-dump-times "\& 15" 1 "original" } } */
  42 /* { dg-final { scan-tree-dump-times "return 0" 2 "original" } } */
  43 /* { dg-final { scan-tree-dump-times "\& 7" 1 "original" } } */
  44 /* { dg-final { cleanup-tree-dump "original" } } */