1
2 /* { dg-do compile { target {{ i?86-*-* x86_64-*-* } && lp64 } } } */
3 /* { dg-options "-O2 -m64 -fdump-tree-optimized" } */
4
5 /* iv i's step 16 so its period is smaller than the max iterations
6 * i.e. replacing if (p2 > p_limit2) with testing of i may result in
7 * overflow. */
foo(long * p,long * p2,int N1,int N2)8 long foo(long* p, long* p2, int N1, int N2)
9 {
10 unsigned long i = 0;
11 long* p_limit2 = p2 + N2;
12 long s = 0;
13 while (i < N1)
14 {
15 p2++;
16 i += 16;
17 if (p2 > p_limit2)
18 break;
19 s += p[i];
20 }
21 return s;
22 }
23
24 /* { dg-final { scan-tree-dump "if \\(.*p_limit2.*\\)" "optimized"} } */
25