core: fix loop detection

jadx-samples/src/main/java/jadx/samples/TestCF3.java

@@ -87,6 +87,23 @@ public class TestCF3 extends AbstractTest {
 		return j > 10;
 	}
 
+	private int testLoops(int[] a, int b) {
+		int i = 0;
+		while (i < a.length && i < b) {
+			a[i]++;
+			i++;
+		}
+		while (i < a.length) {
+			a[i]--;
+			i++;
+		}
+		int sum = 0;
+		for (int e : a) {
+			sum += e;
+		}
+		return sum;
+	}
+
 	public static boolean testLabeledBreakContinue() {
 		String searchMe = "Look for a substring in me";
 		String substring = "sub";
@@ -227,6 +244,8 @@ public class TestCF3 extends AbstractTest {
 		assertEquals(testComplexIfInLoop3(6), 6);
 		assertEquals(testComplexIfInLoop3(8), 24);
 
+		assertEquals(testLoops(new int[]{1, 2, 3, 4, 5, 6}, 2), 19);
+
 		assertTrue(testInline() > 20);
 		assertTrue(testInline2());
 		return true;