gcc/testsuite/gcc.dg/torture/pr91812.c

   1 /* { dg-do compile } */
   2 /* { dg-skip-if "" { *-*-* } { "-fno-fat-lto-objects" } { "" } } */
   3 /* { dg-options "-fdump-tree-optimized-blocks" } */
   4
   5 unsigned register1;
   6 unsigned register2;
   7
   8 void busy_wait_for_register (int x)
   9 {
  10   volatile unsigned* ptr;
  11   switch(x) {
  12     case 0x1111:
  13     ptr = &register1;
  14     break;
  15
  16     case 0x2222:
  17     ptr = &register2;
  18     break;
  19
  20     default:
  21     return;
  22   }
  23   while (*ptr) {}
  24 }
  25
  26 /* { dg-final { scan-tree-dump "loop depth 1" "optimized" } } */