core: fixed 'this' attribute propagation for move insn (#345)

jadx-core/src/test/java/jadx/tests/integration/usethis/TestDontInlineThis.java

@@ -0,0 +1,42 @@
+package jadx.tests.integration.usethis;
+
+import java.util.Random;
+
+import org.junit.Test;
+
+import jadx.core.dex.nodes.ClassNode;
+import jadx.tests.api.IntegrationTest;
+
+import static jadx.tests.api.utils.JadxMatchers.containsOne;
+import static org.junit.Assert.assertThat;
+
+public class TestDontInlineThis extends IntegrationTest {
+
+	public static class TestCls {
+		public int field = new Random().nextInt();
+
+		private TestCls test() {
+			TestCls res;
+			if (field == 7) {
+				res = this;
+			} else {
+				res = new TestCls();
+			}
+			res.method();
+			return res;
+		}
+
+		private void method() {
+		}
+	}
+
+	@Test
+	public void test() {
+		ClassNode cls = getClassNode(TestCls.class);
+		String code = cls.getCode().toString();
+
+		assertThat(code, containsOne("TestDontInlineThis$TestCls res"));
+		assertThat(code, containsOne("res = this;"));
+		assertThat(code, containsOne("res = new TestDontInlineThis$TestCls();"));
+	}
+}

jadx-core/src/test/java/jadx/tests/integration/usethis/TestInlineThis2.java

@@ -0,0 +1,47 @@
+package jadx.tests.integration.usethis;
+
+import java.util.Objects;
+
+import org.junit.Test;
+
+import jadx.core.dex.nodes.ClassNode;
+import jadx.tests.api.IntegrationTest;
+
+import static jadx.tests.api.utils.JadxMatchers.containsOne;
+import static org.hamcrest.CoreMatchers.containsString;
+import static org.hamcrest.CoreMatchers.not;
+import static org.junit.Assert.assertThat;
+
+public class TestInlineThis2 extends IntegrationTest {
+
+	public static class TestCls {
+		public int field;
+
+		private void test() {
+			TestCls thisVar = this;
+			if (Objects.isNull(thisVar)) {
+				System.out.println("null");
+			}
+			thisVar.method();
+			thisVar.field = 123;
+		}
+
+		private void method() {
+		}
+	}
+
+	@Test
+	public void test() {
+		ClassNode cls = getClassNode(TestCls.class);
+		String code = cls.getCode().toString();
+
+		assertThat(code, not(containsString("thisVar")));
+		assertThat(code, not(containsString("thisVar.method()")));
+		assertThat(code, not(containsString("thisVar.field")));
+		assertThat(code, not(containsString("= this")));
+
+		assertThat(code, containsOne("if (Objects.isNull(this)) {"));
+		assertThat(code, containsOne("this.field = 123;"));
+		assertThat(code, containsOne("method();"));
+	}
+}