gcc/testsuite/gcc.dg/20020531-1.c

   1 /* PR optimization/6842
   2    This testcase caused ICE when trying to optimize V8QI subreg of VOIDmode
   3    CONST_DOUBLE.  */
   4 /* { dg-do compile { target i?86-*-* } } */
   5 /* { dg-options "-O2 -mmmx" } */
   6
   7 typedef int __v8qi __attribute__ ((__mode__ (__V8QI__)));
   8 extern void abort (void);
   9 extern void exit (int);
  10
  11 void foo (void)
  12 {
  13   unsigned long long a = 0x0102030405060708LL;
  14   unsigned long long b = 0x1020304050607080LL;
  15   unsigned long long c;
  16
  17   c = (unsigned long long) __builtin_ia32_paddusb ((__v8qi) a, (__v8qi) b);
  18   __builtin_ia32_emms ();
  19   if (c != 0x1122334455667788LL)
  20     abort ();
  21 }