gcc/testsuite/gcc.dg/tree-ssa/bool-9.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1 -fdump-tree-optimized" } */
   3
   4 _Bool f1(_Bool x)
   5 {
   6   return !!x;
   7 }
   8
   9 /* There should be no != 0 which is produced by the front-end as
  10    bool_var != 0 is the same as bool_var. */
  11 /* { dg-final { scan-tree-dump-times "!= 0" 0 "optimized"} } */
  12
  13 /* There should be no subfe for powerpc.  Check if we actually optimized
  14    away the comparison.  */
  15 /* { dg-final { scan-assembler-times "subfe" 0 { target powerpc*-*-* } } } */
  16