gcc/testsuite/gcc.target/arm/pr78255-1.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O2" }  */
   3
   4 #include <string.h>
   5
   6 struct table_s
   7     {
   8     void (*fun0)
   9         ( void );
  10     void (*fun1)
  11         ( void );
  12     void (*fun2)
  13         ( void );
  14     void (*fun3)
  15         ( void );
  16     void (*fun4)
  17         ( void );
  18     void (*fun5)
  19         ( void );
  20     void (*fun6)
  21         ( void );
  22     void (*fun7)
  23         ( void );
  24     } table;
  25
  26 void callback0(){__asm("mov r0, r0 \n\t");}
  27 void callback1(){__asm("mov r0, r0 \n\t");}
  28 void callback2(){__asm("mov r0, r0 \n\t");}
  29 void callback3(){__asm("mov r0, r0 \n\t");}
  30 void callback4(){__asm("mov r0, r0 \n\t");}
  31
  32 void test (void) {
  33     memset(&table, 0, sizeof table);
  34
  35     asm volatile ("" : : : "r3");
  36
  37     table.fun0 = callback0;
  38     table.fun1 = callback1;
  39     table.fun2 = callback2;
  40     table.fun3 = callback3;
  41     table.fun4 = callback4;
  42     table.fun0();
  43 }
  44
  45 void foo (void)
  46 {
  47   __builtin_abort ();
  48 }
  49
  50 int main (void)
  51 {
  52   unsigned long p = (unsigned long) &foo;
  53   asm volatile ("mov r3, %0" : : "r" (p));
  54   test ();
  55
  56   return 0;
  57 }