gcc/testsuite/gcc.target/powerpc/pr106322.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O2 -mdejagnu-cpu=power4" } */
   3
   4 /* As PR106322, verify this can execute well (not abort).  */
   5
   6 #define N 64
   7 typedef unsigned short int uh;
   8 typedef unsigned short int uw;
   9 uh a[N];
  10 uh b[N];
  11 uh c[N];
  12 uh e[N];
  13
  14 __attribute__ ((noipa)) void
  15 foo ()
  16 {
  17   for (int i = 0; i < N; i++)
  18     c[i] = ((uw) b[i] * (uw) a[i]) >> 16;
  19 }
  20
  21 __attribute__ ((optimize ("-O0"))) void
  22 init ()
  23 {
  24   for (int i = 0; i < N; i++)
  25     {
  26       a[i] = (uh) (0x7ABC - 0x5 * i);
  27       b[i] = (uh) (0xEAB + 0xF * i);
  28       e[i] = ((uw) b[i] * (uw) a[i]) >> 16;
  29     }
  30 }
  31
  32 __attribute__ ((optimize ("-O0"))) void
  33 check ()
  34 {
  35   for (int i = 0; i < N; i++)
  36     {
  37       if (c[i] != e[i])
  38         __builtin_abort ();
  39     }
  40 }
  41
  42 int
  43 main ()
  44 {
  45   init ();
  46   foo ();
  47   check ();
  48
  49   return 0;
  50 }