gcc/testsuite/gcc.target/avr/pr67839.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-Os" } */
   3 /* { dg-final { scan-assembler "sbi 0x1f,0" } } */
   4 /* { dg-final { scan-assembler "cbi 0x1f,0" } } */
   5 /* { dg-final { scan-assembler-not "sbi 0x20,0" } } */
   6 /* { dg-final { scan-assembler-not "cbi 0x20,0" } } */
   7 /* { dg-final { scan-assembler "in r\\d+,__SREG__" } } */
   8 /* { dg-final { scan-assembler "out __SREG__,r\\d+" } } */
   9 /* { dg-final { scan-assembler-not "in r\\d+,0x40" } } */
  10 /* { dg-final { scan-assembler-not "out 0x40, r\\d+" } } */
  11
  12 /* This testcase verifies that SBI/CBI/SBIS/SBIC
  13    and IN/OUT instructions are not generated for
  14    an IO addresses outside the valid range.
  15 */
  16 #define IO_ADDR(x) (*((volatile char *)x + __AVR_SFR_OFFSET__))
  17 int main ()
  18 {
  19   IO_ADDR(0x1f) |= 1;
  20   IO_ADDR(0x1f) &= 0xFE;
  21
  22   IO_ADDR(0x20) |= 1;
  23   IO_ADDR(0x20) &= 0xFE;
  24
  25   IO_ADDR(0x3f) = IO_ADDR(0x3f);
  26
  27   IO_ADDR(0x40) = IO_ADDR(0x40);
  28   return 0;
  29 }