1 /* { dg-do compile } */
2 /* { dg-options "-fwrapv -O1 -fno-tree-fre -fdisable-tree-evrp -ftree-vrp -fdump-tree-vrp1" } */
3 
4 extern void abort ();
5 extern void exit (int);
6 
f(int a)7 int f (int a) {
8 	if (a != 0) {
9 		a = a > 0 ? a : -a;
10 		if (a == 0)
11 		  return 1;
12 		return 0;
13 	}
14 	return 0;
15 }
16 
g(int b)17 int g (int b) {
18 	if (b != 0) {
19 		b = b > 0 ? b : -b;
20 		if (b != 0)
21 		  return 0;
22 	}
23 	return 1;
24 }
25 
26 /* { dg-final { scan-tree-dump "Folding predicate a_. == 0 to 0" "vrp1" } } */
27 /* { dg-final { scan-tree-dump "Folding predicate b_. != 0 to 1" "vrp1" } } */
28