gcc/testsuite/gcc.target/i386/interrupt-23.c

   1 /* { dg-do compile { target ia32 } } */
   2 /* { dg-options "-O2 -mgeneral-regs-only -mno-cld -miamcu -maccumulate-outgoing-args" } */
   3
   4 struct interrupt_frame;
   5
   6 extern void callback0 (unsigned int id, unsigned int len)
   7   __attribute__((no_caller_saved_registers));
   8 extern void callback1 (unsigned int id, unsigned int len)
   9   __attribute__((no_caller_saved_registers));
  10 extern void callback2 (unsigned int id, unsigned int len)
  11   __attribute__((no_caller_saved_registers));
  12
  13 typedef void (*callback_t) (unsigned int id, unsigned int len)
  14   __attribute__((no_caller_saved_registers));
  15
  16 callback_t callback[] =
  17 {
  18   callback0,
  19   callback1,
  20   callback2,
  21 };
  22
  23 unsigned int remaining;
  24
  25 void
  26 __attribute__((no_caller_saved_registers))
  27 handler(int uart)
  28 {
  29   while (1) {
  30     if (remaining) {
  31       callback[uart](0, 0);
  32       break;
  33     }
  34   }
  35 }
  36
  37 int uart;
  38
  39 void
  40 __attribute__((interrupt))
  41 my_isr(struct interrupt_frame *frame)
  42 {
  43   handler(uart);
  44 }
  45
  46 /* { dg-final { scan-assembler-times "\tcld" 1 } } */