gcc/testsuite/gcc.dg/loop-unswitch-1.c

   1 /* For PR rtl-optimization/27735  */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -funswitch-loops -fdump-tree-unswitch-details" } */
   4
   5 void set_color(void);
   6 void xml_colorize_line(unsigned int *p, int state)
   7 {
   8   int c;
   9   switch(state)
  10     {
  11     case 1:
  12       goto parse_tag;
  13     case 2:
  14       goto parse_comment;
  15     }
  16
  17   for(;;)
  18     {
  19       c = *p;
  20       if (c == '<' && state == 0)
  21         {
  22 parse_comment: ;
  23           while (*p != '\n')
  24             state = 3;
  25 parse_tag: ;
  26           while (*p != '\n')
  27             state = 0;
  28           set_color();
  29         }
  30       else
  31         p++;
  32     }
  33 }
  34
  35 /* Test that we actually unswitched something.  */
  36 /* { dg-final { scan-tree-dump ";; Unswitching loop" "unswitch" } } */