1 2extern void abort (void); 3 4static void 5foo (int *out, const int *lp, unsigned samples) 6{ 7 int x, target; 8 for (x = 0, target = 0; x < (int)samples; x += 2, target++) 9 { 10 out[x] = lp[target]; 11 out[x - 1] = out[x - 2] + out[x]; 12 } 13} 14 15static void 16foo_novec (int *out, const int *lp, unsigned samples) 17{ 18 int x, target; 19 for (x = 0, target = 0; x < (int)samples; x += 2, target++) 20 { 21 out[x] = lp[target]; 22 out[x - 1] = out[x - 2] + out[x]; 23 __asm__ volatile ("" : : : "memory"); 24 } 25} 26 27int main(void) 28{ 29 const int lp[25] = { 30 0, 2, 4, 6, 8, 31 10, 12, 14, 16, 32 18, 20, 22, 24, 33 26, 28, 30, 32, 34 34, 36, 38, 40, 35 42, 44, 46, 48, 36 }; 37 int out[49] = {0}; 38 int out2[49] = {0}; 39 int s; 40 41 foo (out + 2, lp + 1, 48); 42 foo_novec (out2 + 2, lp + 1, 48); 43 44 for (s = 0; s < 49; s++) 45 if (out[s] != out2[s]) 46 abort (); 47 48 return 0; 49} 50 51/* { dg-final { cleanup-tree-dump "vect" } } */ 52