fix: handle boolean condition with bitwise OR and AND (#202) (PR #522)

jadx-core/src/main/java/jadx/core/dex/regions/conditions/IfCondition.java

@@ -7,9 +7,10 @@
 import java.util.LinkedList;
 import java.util.List;
 
+import jadx.core.dex.instructions.ArithNode;
+import jadx.core.dex.instructions.ArithOp;
 import jadx.core.dex.instructions.IfNode;
 import jadx.core.dex.instructions.IfOp;
-import jadx.core.dex.instructions.InsnType;
 import jadx.core.dex.instructions.args.InsnWrapArg;
 import jadx.core.dex.instructions.args.LiteralArg;
 import jadx.core.dex.instructions.args.RegisterArg;
@@ -142,7 +143,10 @@ public static IfCondition not(IfCondition cond) {
 	public static IfCondition simplify(IfCondition cond) {
 		if (cond.isCompare()) {
 			Compare c = cond.getCompare();
-			simplifyCmpOp(c);
+			IfCondition i = simplifyCmpOp(c);
+			if (i != null) {
+				return i;
+			}
 			if (c.getOp() == IfOp.EQ && c.getB().isLiteral() && c.getB().equals(LiteralArg.FALSE)) {
 				cond = not(new IfCondition(c.invert()));
 			} else {
@@ -190,20 +194,53 @@ public static IfCondition simplify(IfCondition cond) {
 		return cond;
 	}
 
-	private static void simplifyCmpOp(Compare c) {
+	private static IfCondition simplifyCmpOp(Compare c) {
 		if (!c.getA().isInsnWrap()) {
-			return;
+			return null;
 		}
-		if (!c.getB().isLiteral() || ((LiteralArg) c.getB()).getLiteral() != 0) {
-			return;
+		if (!c.getB().isLiteral()) {
+			return null;
 		}
+		long lit = ((LiteralArg) c.getB()).getLiteral();
+		if (lit != 0 && lit != 1) {
+			return null;
+		}
+
 		InsnNode wrapInsn = ((InsnWrapArg) c.getA()).getWrapInsn();
-		InsnType type = wrapInsn.getType();
-		if (type != InsnType.CMP_L && type != InsnType.CMP_G) {
-			return;
+		switch (wrapInsn.getType()) {
+			case CMP_L:
+			case CMP_G:
+				if (lit == 0) {
+					IfNode insn = c.getInsn();
+					insn.changeCondition(insn.getOp(), wrapInsn.getArg(0), wrapInsn.getArg(1));
+				}
+				break;
+
+			case ARITH:
+				ArithOp arithOp = ((ArithNode) wrapInsn).getOp();
+				if (arithOp == ArithOp.OR || arithOp == ArithOp.AND) {
+					IfOp ifOp = c.getInsn().getOp();
+					boolean isTrue = ifOp == IfOp.NE && lit == 0
+							|| ifOp == IfOp.EQ && lit == 1;
+
+					IfOp op = isTrue ? IfOp.NE : IfOp.EQ;
+					Mode mode = isTrue && arithOp == ArithOp.OR ||
+							!isTrue && arithOp == ArithOp.AND ? Mode.OR : Mode.AND;
+
+					IfNode if1 = new IfNode(op, -1, wrapInsn.getArg(0), LiteralArg.FALSE);
+					IfNode if2 = new IfNode(op, -1, wrapInsn.getArg(1), LiteralArg.FALSE);
+					return new IfCondition(mode,
+							Arrays.asList(new IfCondition(new Compare(if1)),
+									new IfCondition(new Compare(if2))));
+				}
+			break;
+
+		default:
+			break;
 		}
-		IfNode insn = c.getInsn();
-		insn.changeCondition(insn.getOp(), wrapInsn.getArg(0), wrapInsn.getArg(1));
+
+
+		return null;
 	}
 
 	public List<RegisterArg> getRegisterArgs() {

jadx-core/src/test/java/jadx/tests/integration/conditions/TestBitwiseAnd.java

@@ -0,0 +1,92 @@
+package jadx.tests.integration.conditions;
+
+import org.junit.jupiter.api.Test;
+
+import jadx.core.dex.nodes.ClassNode;
+import jadx.tests.api.IntegrationTest;
+
+import static jadx.tests.api.utils.JadxMatchers.containsOne;
+import static org.hamcrest.MatcherAssert.assertThat;
+
+public class TestBitwiseAnd extends IntegrationTest {
+
+	public static class TestCls {
+		private boolean a;
+		private boolean b;
+
+		public void test() {
+			if ((a & b) != false) {
+				test();
+			}
+		}
+	}
+
+	@Test
+	public void test() {
+		noDebugInfo();
+		ClassNode cls = getClassNode(TestCls.class);
+		String code = cls.getCode().toString();
+
+		assertThat(code, containsOne("if (this.a && this.b) {"));
+	}
+
+	public static class TestCls2 {
+		private boolean a;
+		private boolean b;
+
+		public void test() {
+			if ((a & b) != true) {
+				test();
+			}
+		}
+	}
+
+	@Test
+	public void test2() {
+		noDebugInfo();
+		ClassNode cls = getClassNode(TestCls2.class);
+		String code = cls.getCode().toString();
+
+		assertThat(code, containsOne("if (!this.a || !this.b) {"));
+	}
+
+	public static class TestCls3 {
+		private boolean a;
+		private boolean b;
+
+		public void test() {
+			if ((a & b) == false) {
+				test();
+			}
+		}
+	}
+
+	@Test
+	public void test3() {
+		noDebugInfo();
+		ClassNode cls = getClassNode(TestCls3.class);
+		String code = cls.getCode().toString();
+
+		assertThat(code, containsOne("if (!this.a || !this.b) {"));
+	}
+
+	public static class TestCls4 {
+		private boolean a;
+		private boolean b;
+
+		public void test() {
+			if ((a & b) == true) {
+				test();
+			}
+		}
+	}
+
+	@Test
+	public void test4() {
+		noDebugInfo();
+		ClassNode cls = getClassNode(TestCls4.class);
+		String code = cls.getCode().toString();
+
+		assertThat(code, containsOne("if (this.a && this.b) {"));
+	}
+}

jadx-core/src/test/java/jadx/tests/integration/conditions/TestBitwiseOr.java

@@ -0,0 +1,92 @@
+package jadx.tests.integration.conditions;
+
+import org.junit.jupiter.api.Test;
+
+import jadx.core.dex.nodes.ClassNode;
+import jadx.tests.api.IntegrationTest;
+
+import static jadx.tests.api.utils.JadxMatchers.containsOne;
+import static org.hamcrest.MatcherAssert.assertThat;
+
+public class TestBitwiseOr extends IntegrationTest {
+
+	public static class TestCls {
+		private boolean a;
+		private boolean b;
+
+		public void test() {
+			if ((a | b) != false) {
+				test();
+			}
+		}
+	}
+
+	@Test
+	public void test() {
+		noDebugInfo();
+		ClassNode cls = getClassNode(TestCls.class);
+		String code = cls.getCode().toString();
+
+		assertThat(code, containsOne("if (this.a || this.b) {"));
+	}
+
+	public static class TestCls2 {
+		private boolean a;
+		private boolean b;
+
+		public void test() {
+			if ((a | b) != true) {
+				test();
+			}
+		}
+	}
+
+	@Test
+	public void test2() {
+		noDebugInfo();
+		ClassNode cls = getClassNode(TestCls2.class);
+		String code = cls.getCode().toString();
+
+		assertThat(code, containsOne("if (!this.a && !this.b) {"));
+	}
+
+	public static class TestCls3 {
+		private boolean a;
+		private boolean b;
+
+		public void test() {
+			if ((a | b) == false) {
+				test();
+			}
+		}
+	}
+
+	@Test
+	public void test3() {
+		noDebugInfo();
+		ClassNode cls = getClassNode(TestCls3.class);
+		String code = cls.getCode().toString();
+
+		assertThat(code, containsOne("if (!this.a && !this.b) {"));
+	}
+
+	public static class TestCls4 {
+		private boolean a;
+		private boolean b;
+
+		public void test() {
+			if ((a | b) == true) {
+				test();
+			}
+		}
+	}
+
+	@Test
+	public void test4() {
+		noDebugInfo();
+		ClassNode cls = getClassNode(TestCls4.class);
+		String code = cls.getCode().toString();
+
+		assertThat(code, containsOne("if (this.a || this.b) {"));
+	}
+}