gcc/testsuite/gcc.dg/tree-ssa/pr109834-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1 -fdump-tree-optimized" } */
   3
   4 int f (char v)
   5 {
   6   return __builtin_popcount((int)__builtin_bswap16(v));
   7 }
   8
   9 /* We should be able to remove the bswap here as it does not matter
  10    for the popcount.  */
  11 /* { dg-final { scan-tree-dump-not "bswap" "optimized"} } */