[Bug rtl-optimization/36008] [4.3/4.4 Regression] Function produces wrong results when inlined.

[jakub at gcc dot gnu dot org]

------- Comment #11 from jakub at gcc dot gnu dot org  2008-04-24 09:33 -------
extern void abort (void);

int g[48][3][3];

void __attribute__ ((noinline))
bar (int x[3][3], int y[3][3])
{
  static int i;
  if (x != g[i + 8] || y != g[i++])
    abort ();
}

static inline void __attribute__ ((always_inline))
foo (int x[][3][3])
{
  int i;
  for (i = 0; i < 8; i++)
#ifdef GOOD
    bar (x[i + 8], x[i]);
#else
    {
      int k = i + 8;
      bar (x[k], x[k - 8]);
    }
#endif
}

int
main ()
{
  foo (g);
  return 0;
}

with -DGOOD doesn't fail at any optimization level, without it fails again with
-O2 -funroll-loops, -O3 etc.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36008