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

   1 /* { dg-do run } */
   2 /* { dg-options "-falign-labels=8" } */
   3 /* { dg-skip-if "no label alignment > 2" { "pdp11-*-*" } } */
   4
   5 /* On ARMv7-A CPUs, this test resulted in incorrect code generation.
   6    The code generated for the switch statement expected the jump table
   7    to immediately follow the jump instruction, but -falign-labels
   8    caused the label preceding the table to be aligned.  */
   9 /* M68K and fido only support -falign-labels argument <= 2.  */
  10
  11 volatile int x;
  12
  13 int main(void)
  14 {
  15   int y;
  16
  17   x = 0;
  18
  19   switch(x)
  20     {
  21     case 0:
  22       y = 2 * x;
  23       break;
  24     case 1:
  25       y = -3 * x;
  26       break;
  27     case 2:
  28       y = x + 5;
  29       break;
  30     case 3:
  31       y = x - 7;
  32       break;
  33     default:
  34       break;
  35     }
  36
  37   x = y;
  38
  39   return 0;
  40 }