gcc/testsuite/gcc.c-torture/execute/20030613-1.c

   1 /* PR optimization/10955 */
   2 /* Originator: <heinrich.brand@fujitsu-siemens.com> */
   3
   4 /* This used to fail on SPARC32 at -O3 because the loop unroller
   5    wrongly thought it could eliminate a pseudo in a loop, while
   6    the pseudo was used outside the loop.  */
   7
   8 extern void abort(void);
   9
  10 #define COMPLEX struct CS
  11
  12 COMPLEX {
  13   long x;
  14   long y;
  15 };
  16
  17
  18 static COMPLEX CCID (COMPLEX x)
  19 {
  20   COMPLEX a;
  21
  22   a.x = x.x;
  23   a.y = x.y;
  24
  25   return a;
  26 }
  27
  28
  29 static COMPLEX CPOW (COMPLEX x, int y)
  30 {
  31   COMPLEX a;
  32   a = x;
  33
  34   while (--y > 0)
  35     a=CCID(a);
  36
  37   return a;
  38 }
  39
  40
  41 static int c5p (COMPLEX x)
  42 {
  43   COMPLEX a,b;
  44   a = CPOW (x, 2);
  45   b = CCID( CPOW(a,2) );
  46
  47   return (b.x == b.y);
  48 }
  49
  50
  51 int main (void)
  52 {
  53   COMPLEX  x;
  54
  55   x.x = -7;
  56   x.y = -7;
  57
  58   if (!c5p(x))
  59     abort();
  60
  61   return 0;
  62 }