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

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-switchconv" } */
   3 /* { dg-do run } */
   4
   5 extern void abort (void);
   6
   7 static int X, Y;
   8
   9 int check(int param)
  10 {
  11   int a = 0;
  12   int b = 1;
  13
  14   switch (param)
  15     {
  16     case -2:
  17       a = 0;
  18       b = -1;
  19       break;
  20     case 1:
  21     case 2:
  22       a = 8;
  23       b = 6;
  24       break;
  25     case 3:
  26       a = 9;
  27       b = 5;
  28       break;
  29     case 6:
  30       a = 10;
  31       b = 4;
  32       break;
  33     default:
  34       a = 16;
  35       b = 1;
  36     }
  37
  38   X = a;
  39   Y = b;
  40   return 0;
  41 }
  42
  43 void assertions(int a, int b)
  44 {
  45   if (X != a || Y != b)
  46     abort();
  47
  48   return;
  49 }
  50
  51 int main ()
  52 {
  53   check (-10);
  54   assertions (16, 1);
  55
  56   check (-2);
  57   assertions (0, -1);
  58
  59   check(1);
  60   assertions (8, 6);
  61
  62   check(2);
  63   assertions (8, 6);
  64
  65   check(3);
  66   assertions (9, 5);
  67
  68   check(5);
  69   assertions (16, 1);
  70
  71   check(6);
  72   assertions (10, 4);
  73
  74   check(12);
  75   assertions (16, 1);
  76
  77   return 0;
  78 }
  79
  80 /* { dg-final { scan-tree-dump "Switch converted" "switchconv" } } */
  81 /* { dg-final { cleanup-tree-dump "switchconv" } } */