gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-thread-9.c

   1 /* PR 65048 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O3 -std=gnu89" } */
   4
   5 int a, b, c, d;
   6 void fn (void);
   7
   8 int
   9 foo (x)
  10      int x;
  11 {
  12   switch (x)
  13     {
  14     case 'A':
  15       return 'T';
  16     case 'U':
  17       return 'A';
  18     }
  19 }
  20
  21 void
  22 bar (int x, int y)
  23 {
  24   switch (c)
  25     {
  26     case 'U':
  27       switch (x)
  28         {
  29         default:
  30           fn ();
  31         case 'G':
  32           switch (y)
  33             {
  34             case 'A':
  35               d = 7;
  36             }
  37         }
  38     }
  39 }
  40
  41 void
  42 baz (void)
  43 {
  44   while (1)
  45     {
  46       a = foo ();
  47       b = foo ();
  48       bar (a, b);
  49     }
  50 }
  51