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 #if __mips_isa_rev <= 5
   9 unsigned int g;
  10
  11 unsigned __attribute__ ((nomips16)) long long f (unsigned int x)
  12 {
  13   union { unsigned long long ll; unsigned int parts[2]; } u;
  14
  15   u.ll = ((unsigned long long) x * x);
  16   asm ("mflo\t%0" : "=r" (g) : "l" (u.parts[1]));
  17   return u.ll;
  18 }
  19 #endif
  20
  21 int __attribute__ ((nomips16)) main ()
  22 {
  23 #if __mips_isa_rev <= 5
  24   union { unsigned long long ll; unsigned int parts[2]; } u;
  25
  26   u.ll = f (0x12345678);
  27   if (g != u.parts[1])
  28     abort ();
  29 #endif
  30   exit (0);
  31 }