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

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-original" } */
   3 int test1(int a)
   4 {
   5   return !(a & 1);
   6 }
   7
   8 int test2(int b)
   9 {
  10   return (b & 1) == 0;
  11 }
  12
  13 int test3(int c)
  14 {
  15   return (c & 1) ^ 1;
  16 }
  17
  18 int test4(int d)
  19 {
  20   return (d ^ 1) & 1;
  21 }
  22
  23 int test5(int e)
  24 {
  25   return ~e & 1;
  26 }
  27
  28 /* { dg-final { scan-tree-dump-times "\\(a \& 1\\) == 0" 1 "original" } } */
  29 /* { dg-final { scan-tree-dump-times "\\(b \& 1\\) == 0" 1 "original" } } */
  30 /* { dg-final { scan-tree-dump-times "\\(c \& 1\\) == 0" 1 "original" } } */
  31 /* { dg-final { scan-tree-dump-times "\\(d \& 1\\) == 0" 1 "original" } } */
  32 /* { dg-final { scan-tree-dump-times "\\(e \& 1\\) == 0" 1 "original" } } */