JVM_IR: fix const reads from other files in same module

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/ConstLowering.kt

@@ -49,8 +49,7 @@ class ConstLowering(val context: JvmBackendContext) : IrElementTransformerVoid()
     override fun visitCall(expression: IrCall): IrExpression {
         val function = (expression.symbol.owner as? IrSimpleFunction) ?: return super.visitCall(expression)
         val property = function.correspondingPropertySymbol?.owner ?: return super.visitCall(expression)
-        if (function != property.getter)
-            return super.visitCall(expression)
+        // If `constantValue` is not null, `function` can only be the getter because the property is immutable.
         return expression.lowerConstRead(property.backingField) ?: super.visitCall(expression)
     }
 

compiler/testData/codegen/box/properties/const/anotherFile.kt

@@ -0,0 +1,7 @@
+// FILE: 1.kt
+// File names are important! This file should come before the other one
+// in a lexicographic order.
+const val x = "OK"
+
+// FILE: 2.kt
+fun box() = x

compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java

@@ -18626,6 +18626,11 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
                 KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/box/properties/const"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.JVM, true);
             }
 
+            @TestMetadata("anotherFile.kt")
+            public void testAnotherFile() throws Exception {
+                runTest("compiler/testData/codegen/box/properties/const/anotherFile.kt");
+            }
+
             @TestMetadata("constFlags.kt")
             public void testConstFlags() throws Exception {
                 runTest("compiler/testData/codegen/box/properties/const/constFlags.kt");

compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java

@@ -18626,6 +18626,11 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
                 KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/box/properties/const"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.JVM, true);
             }
 
+            @TestMetadata("anotherFile.kt")
+            public void testAnotherFile() throws Exception {
+                runTest("compiler/testData/codegen/box/properties/const/anotherFile.kt");
+            }
+
             @TestMetadata("constFlags.kt")
             public void testConstFlags() throws Exception {
                 runTest("compiler/testData/codegen/box/properties/const/constFlags.kt");

compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java

@@ -17511,6 +17511,11 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
                 KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/box/properties/const"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.JVM_IR, true);
             }
 
+            @TestMetadata("anotherFile.kt")
+            public void testAnotherFile() throws Exception {
+                runTest("compiler/testData/codegen/box/properties/const/anotherFile.kt");
+            }
+
             @TestMetadata("constFlags.kt")
             public void testConstFlags() throws Exception {
                 runTest("compiler/testData/codegen/box/properties/const/constFlags.kt");