gcc/testsuite/gcc.dg/torture/mips-hilo-2.c

   1 /* Due to a reload inheritance bug, the asm statement in f() would be passed
   2    the low part of u.ll on little-endian 32-bit targets.  */
   3 /* { dg-do run { target mips*-*-* } } */
   4
   5 extern void abort (void);
   6 extern void exit (int);
   7
   8 unsigned int g;
   9
  10 unsigned __attribute__ ((nomips16)) long long f (unsigned int x)
  11 {
  12   union { unsigned long long ll; unsigned int parts[2]; } u;
  13
  14   u.ll = ((unsigned long long) x * x);
  15   asm ("mflo\t%0" : "=r" (g) : "l" (u.parts[1]));
  16   return u.ll;
  17 }
  18
  19 int __attribute__ ((nomips16)) main ()
  20 {
  21   union { unsigned long long ll; unsigned int parts[2]; } u;
  22
  23   u.ll = f (0x12345678);
  24   if (g != u.parts[1])
  25     abort ();
  26   exit (0);
  27 }