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

   1 /* { dg-do compile } */
   2 /* { dg-options "-fdump-tree-useless" } */
   3
   4 void *alloca (__SIZE_TYPE__);
   5 void link_error ();
   6
   7 int main (int argc, char *argv[]) {
   8         char *foo;
   9         if ((foo = alloca(argc)) == 0)
  10           link_error ();
  11         return 0;
  12 }
  13 /* { dg-final { scan-tree-dump-times "link_error" 0 "useless" } } */
  14 /* { dg-final { cleanup-tree-dump "useless" } } */