gcc/testsuite/gcc.dg/tree-ssa/vrp106.c

   1 /* PR tree-optimization/18046  */
   2 /* { dg-options "-O2 -fdump-tree-ethread-details" }  */
   3 /* { dg-final { scan-tree-dump-times "Registering jump thread" 1 "ethread" } }  */
   4 /* During VRP we expect to thread the true arm of the conditional through the switch
   5    and to the BB that corresponds to the 7 ... 9 case label.  */
   6 extern void foo (void);
   7 extern void bar (void);
   8 extern void baz (void);
   9
  10 void
  11 test (int i)
  12 {
  13   if (i >= 7 && i <= 8)
  14     foo ();
  15
  16   switch (i)
  17   {
  18     case 1:
  19       bar ();
  20       break;
  21     case 7:
  22     case 8:
  23     case 9:
  24       baz ();
  25       break;
  26   }
  27 }