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

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-optimized" } */
   3 void bar (unsigned int);
   4
   5 void
   6 foo (void)
   7 {
   8   char buf[1] = { 3 };
   9   const char *p = buf;
  10   const char **q = &p;
  11   unsigned int ch;
  12   switch (**q)
  13     {
  14     case 1:  ch = 5; break;
  15     case 2:  ch = 4; break;
  16     case 3:  ch = 3; break;
  17     case 4:  ch = 2; break;
  18     case 5:  ch = 1; break;
  19     default: ch = 0; break;
  20     }
  21   bar (ch);
  22 }
  23 /* The switch should be switch converted and later constant propagated.  */
  24 /* { dg-final { scan-tree-dump-not "CSWTCH" "optimized"} } */
  25 /* { dg-final { scan-tree-dump-not "switch" "optimized"} } */