fix: don't apply const split if not needed

jadx-core/src/main/java/jadx/core/dex/visitors/typeinference/TypeInferenceVisitor.java

@@ -586,6 +586,10 @@ public final class TypeInferenceVisitor extends AbstractVisitor {
 	}
 
 	private boolean checkAndSplitConstInsn(MethodNode mth, SSAVar var) {
+		ArgType type = var.getTypeInfo().getType();
+		if (type.isTypeKnown() || var.isTypeImmutable()) {
+			return false;
+		}
 		if (var.getUsedInPhi().size() < 2) {
 			return false;
 		}

jadx-core/src/test/java/jadx/tests/integration/types/TestPrimitiveConversion2.java

@@ -17,6 +17,8 @@ public class TestPrimitiveConversion2 extends SmaliTest {
 				.doesNotContain("z2 == 0")
 				.doesNotContain("z2 | 2")
 				.containsOne("(z2 ? 1 : 0) | 2")
-				.containsOne("if (z2 && formatCurrency != null) {");
+				.containsOne("if (z2 && formatCurrency != null) {")
+				.containsOne("i = 1;")
+				.containsOne("spannable = null;");
 	}
 }