1  /* PR middle-end/18548 */
       2  /* Test case reduced by Andrew Pinski <pinskia@physics.uc.edu> */
       3  /* { dg-do run } */
       4  /* { dg-options "-O1 " } */
       5  /* Option -fno-tree-lrs removed By Andrew MacLeod since it is no longer 
       6     supported in the compiler beginning with GCC 4.3.  */
       7  /* m32c has varying sized pointers */
       8  /* { dg-skip-if "" { "m32c-*-*" } { "*" } { "-mcpu=m32c" "-mcpu=m32cm" } } */
       9  
      10  __extension__ typedef __INTPTR_TYPE__ intptr_t;
      11  
      12  extern void abort (void);
      13  
      14  intptr_t fff[10];
      15  
      16  void f(intptr_t a, intptr_t b)
      17  {
      18    intptr_t crcc = b;
      19    intptr_t d = *((intptr_t*)(a+1));
      20    int i;
      21  
      22    a = d >= b? d:b;
      23  
      24  
      25    for(i=0;i<10;i++)
      26     fff[i] = a;
      27  }
      28  
      29  /* The variable a cannot be a local variable as we get better aliasing
      30     now and decide that the store to a is dead.  The better aliasing comes
      31     from better representation of pointer arithmetic. */
      32  intptr_t a = 10;
      33  int main(void)
      34  {
      35    int i;
      36    f((intptr_t)(&a)-1,0);
      37    for(i = 0;i<10;i++)
      38     if (fff[i]!=10)
      39      abort ();
      40    return 0;
      41  }
      42