JVM_IR more aggressive if-null expressions fusion

Assume that changing a return type from T to T?
is not a binary-compatible change.

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/es6/semantics/IrJsCodegenBoxES6TestGenerated.java

@@ -1030,6 +1030,11 @@ public class IrJsCodegenBoxES6TestGenerated extends AbstractIrJsCodegenBoxES6Tes
             runTest("compiler/testData/codegen/box/boxingOptimization/safeCallWithElvis.kt");
         }
 
+        @TestMetadata("safeCallWithElvisMultipleFiles.kt")
+        public void testSafeCallWithElvisMultipleFiles() throws Exception {
+            runTest("compiler/testData/codegen/box/boxingOptimization/safeCallWithElvisMultipleFiles.kt");
+        }
+
         @TestMetadata("simple.kt")
         public void testSimple() throws Exception {
             runTest("compiler/testData/codegen/box/boxingOptimization/simple.kt");

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/semantics/IrJsCodegenBoxTestGenerated.java

@@ -1030,6 +1030,11 @@ public class IrJsCodegenBoxTestGenerated extends AbstractIrJsCodegenBoxTest {
             runTest("compiler/testData/codegen/box/boxingOptimization/safeCallWithElvis.kt");
         }
 
+        @TestMetadata("safeCallWithElvisMultipleFiles.kt")
+        public void testSafeCallWithElvisMultipleFiles() throws Exception {
+            runTest("compiler/testData/codegen/box/boxingOptimization/safeCallWithElvisMultipleFiles.kt");
+        }
+
         @TestMetadata("simple.kt")
         public void testSimple() throws Exception {
             runTest("compiler/testData/codegen/box/boxingOptimization/simple.kt");

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java

@@ -1030,6 +1030,11 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
             runTest("compiler/testData/codegen/box/boxingOptimization/safeCallWithElvis.kt");
         }
 
+        @TestMetadata("safeCallWithElvisMultipleFiles.kt")
+        public void testSafeCallWithElvisMultipleFiles() throws Exception {
+            runTest("compiler/testData/codegen/box/boxingOptimization/safeCallWithElvisMultipleFiles.kt");
+        }
+
         @TestMetadata("simple.kt")
         public void testSimple() throws Exception {
             runTest("compiler/testData/codegen/box/boxingOptimization/simple.kt");

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/wasm/semantics/IrCodegenBoxWasmTestGenerated.java

@@ -900,6 +900,11 @@ public class IrCodegenBoxWasmTestGenerated extends AbstractIrCodegenBoxWasmTest
             runTest("compiler/testData/codegen/box/boxingOptimization/safeCallWithElvis.kt");
         }
 
+        @TestMetadata("safeCallWithElvisMultipleFiles.kt")
+        public void testSafeCallWithElvisMultipleFiles() throws Exception {
+            runTest("compiler/testData/codegen/box/boxingOptimization/safeCallWithElvisMultipleFiles.kt");
+        }
+
         @TestMetadata("simple.kt")
         public void testSimple() throws Exception {
             runTest("compiler/testData/codegen/box/boxingOptimization/simple.kt");