gcc/testsuite/gcc.target/i386/interrupt-21.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 void (*callback[1])(unsigned int id, unsigned int len);
   7 unsigned int remaining;
   8
   9 void
  10 __attribute__((no_caller_saved_registers))
  11 handler(int uart)
  12 {
  13   while (1) {
  14     if (remaining) {
  15       callback[uart](0, 0);
  16       break;
  17     }
  18   }
  19 }
  20
  21 int uart;
  22
  23 void
  24 __attribute__((interrupt))
  25 my_isr(struct interrupt_frame *frame)
  26 {
  27   handler(uart);
  28 }
  29
  30 /* { dg-final { scan-assembler-times "\tcld" 1 } } */