From 4b3a8e757b5688162b3a0fd00d2cc36a70c0c35f Mon Sep 17 00:00:00 2001
From: Alexey Andreev <konsoletyper@gmail.com>
Date: Tue, 3 Dec 2019 20:57:24 +0300
Subject: [PATCH] Reduce size of a Kotlin program that uses lightweight
 reflection

---
 .../impl/ClassForNameTransformer.java         | 22 ++++++++++------
 .../teavm/classlib/impl/ExceptionHelpers.java | 25 +++++++++++++++++++
 2 files changed, 40 insertions(+), 7 deletions(-)
 create mode 100644 classlib/src/main/java/org/teavm/classlib/impl/ExceptionHelpers.java

diff --git a/classlib/src/main/java/org/teavm/classlib/impl/ClassForNameTransformer.java b/classlib/src/main/java/org/teavm/classlib/impl/ClassForNameTransformer.java
index c56741f35..bb59d5b2e 100644
--- a/classlib/src/main/java/org/teavm/classlib/impl/ClassForNameTransformer.java
+++ b/classlib/src/main/java/org/teavm/classlib/impl/ClassForNameTransformer.java
@@ -121,14 +121,22 @@ public class ClassForNameTransformer implements ClassHolderTransformer {
                     representative = program.variableAt(nameRepresentatives[nameIndex]);
                 } else if (constant != null) {
                     if (hierarchy.getClassSource().get(constant) == null || !filterClassName(constant)) {
-                        continue;
+                        InvokeInstruction invokeException = new InvokeInstruction();
+                        invokeException.setType(InvocationType.SPECIAL);
+                        invokeException.setMethod(new MethodReference(ExceptionHelpers.class, "classNotFound",
+                                Class.class));
+                        invokeException.setReceiver(program.createVariable());
+                        invokeException.setLocation(invoke.getLocation());
+                        invoke.insertPrevious(invokeException);
+                        representative = invokeException.getReceiver();
+                    } else {
+                        ClassConstantInstruction classConstant = new ClassConstantInstruction();
+                        classConstant.setConstant(ValueType.object(constant));
+                        classConstant.setReceiver(program.createVariable());
+                        classConstant.setLocation(invoke.getLocation());
+                        invoke.insertPrevious(classConstant);
+                        representative = classConstant.getReceiver();
                     }
-                    ClassConstantInstruction classConstant = new ClassConstantInstruction();
-                    classConstant.setConstant(ValueType.object(constant));
-                    classConstant.setReceiver(program.createVariable());
-                    classConstant.setLocation(invoke.getLocation());
-                    invoke.insertPrevious(classConstant);
-                    representative = classConstant.getReceiver();
                 } else {
                     continue;
                 }
diff --git a/classlib/src/main/java/org/teavm/classlib/impl/ExceptionHelpers.java b/classlib/src/main/java/org/teavm/classlib/impl/ExceptionHelpers.java
new file mode 100644
index 000000000..8e8ca4543
--- /dev/null
+++ b/classlib/src/main/java/org/teavm/classlib/impl/ExceptionHelpers.java
@@ -0,0 +1,25 @@
+/*
+ *  Copyright 2019 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.classlib.impl;
+
+public class ExceptionHelpers {
+    private ExceptionHelpers() {
+    }
+
+    public static Class<?> classNotFound() throws ClassNotFoundException {
+        throw new ClassNotFoundException();
+    }
+}