gcc/testsuite/gcc.dg/pr48552-1.c

   1 /* PR c/48552 */
   2 /* { dg-do compile } */
   3 /* { dg-options "" } */
   4
   5 struct S;
   6
   7 void
   8 f1 (void *x)
   9 {
  10   __asm volatile ("" : : "r" (*x));     /* { dg-warning "dereferencing" "deref" } */
  11 }                                       /* { dg-error "invalid use of void expression" "void expr" { target *-*-* } .-1 } */
  12
  13 void
  14 f2 (void *x)
  15 {
  16   __asm volatile ("" : "=r" (*x));      /* { dg-warning "dereferencing" "deref" } */
  17 }                                       /* { dg-error "invalid use of void expression" "void expr" { target *-*-* } .-1 } */
  18
  19 void
  20 f3 (void *x)
  21 {
  22   __asm volatile ("" : : "m" (*x));     /* { dg-warning "dereferencing" } */
  23 }
  24
  25 void
  26 f4 (void *x)
  27 {
  28   __asm volatile ("" : "=m" (*x));      /* { dg-warning "dereferencing" } */
  29 }
  30
  31 void
  32 f5 (void *x)
  33 {
  34   __asm volatile ("" : : "g" (*x));     /* { dg-warning "dereferencing" "deref" } */
  35 }                                       /* { dg-error "invalid use of void expression" "void expr" { target *-*-* } .-1 } */
  36
  37 void
  38 f6 (void *x)
  39 {
  40   __asm volatile ("" : "=g" (*x));      /* { dg-warning "dereferencing" "deref" } */
  41 }                                       /* { dg-error "invalid use of void expression" "void expr" { target *-*-* } .-1 } */
  42
  43 void
  44 f7 (struct S *x)
  45 {
  46   __asm volatile ("" : : "r" (*x));     /* { dg-error "invalid use of undefined type" } */
  47 }
  48
  49 void
  50 f8 (struct S *x)
  51 {
  52   __asm volatile ("" : "=r" (*x));      /* { dg-error "impossible constraint in 'asm'" } */
  53   /* { dg-error "non-memory output 0 must stay in memory" "memory" { target *-*-* } .-1 } */
  54 }