gcc/testsuite/gcc.dg/tree-ssa/bitcmp-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-optimized" } */
   3 /* PR tree-optimization/101590 */
   4
   5 int f_and_le(unsigned len) {
   6   const unsigned N = 4;
   7   unsigned newlen = len & -N;
   8   return newlen <= len; // return 1
   9 }
  10 int f_or_ge(unsigned len) {
  11   const unsigned N = 4;
  12   unsigned newlen = len | -N;
  13   return newlen >= len; // return 1
  14 }
  15
  16 /* { dg-final { scan-tree-dump-not " <= " "optimized" } } */
  17 /* { dg-final { scan-tree-dump-not " >= " "optimized" } } */
  18 /* { dg-final { scan-tree-dump-not " & "  "optimized" } } */
  19 /* { dg-final { scan-tree-dump-not " \\\| " "optimized" } } */
  20 /* { dg-final { scan-tree-dump-times "return 1;" 2 "optimized" } } */