gcc/testsuite/gcc.dg/falign-labels-1.c

   1 /* { dg-do run } */
   2 /* { dg-options "-falign-labels=8" } */
   3
   4 /* On ARMv7-A CPUs, this test resulted in incorrect code generation.
   5    The code generated for the switch statement expected the jump table
   6    to immediately follow the jump instruction, but -falign-labels
   7    caused the label preceding the table to be aligned.  */
   8 /* M68K and fido only support -falign-labels argument <= 2.  */
   9
  10 volatile int x;
  11
  12 int main(void)
  13 {
  14   int y;
  15
  16   x = 0;
  17
  18   switch(x)
  19     {
  20     case 0:
  21       y = 2 * x;
  22       break;
  23     case 1:
  24       y = -3 * x;
  25       break;
  26     case 2:
  27       y = x + 5;
  28       break;
  29     case 3:
  30       y = x - 7;
  31       break;
  32     default:
  33       break;
  34     }
  35
  36   x = y;
  37
  38   return 0;
  39 }