JVM_IR: fix source file name for mutlifile class facades

compiler/backend/src/org/jetbrains/kotlin/codegen/MemberCodegen.java

@@ -726,7 +726,7 @@ public abstract class MemberCodegen<T extends KtPureElement/* TODO: & KtDeclarat
     public SourceMapper getOrCreateSourceMapper() {
         if (sourceMapper == null) {
             // note: this is used in InlineCodegen and the element is always physical (KtElement) there
-            sourceMapper = new SourceMapper(SourceInfo.Companion.createInfo((KtElement)element, getClassName()));
+            sourceMapper = new SourceMapper(SourceInfo.Companion.createFromPsi((KtElement)element, getClassName()));
         }
         return sourceMapper;
     }

compiler/backend/src/org/jetbrains/kotlin/codegen/SourceInfo.kt

@@ -21,28 +21,26 @@ import org.jetbrains.kotlin.psi.KtElement
 import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.psi.KtNamedFunction
 
-data class SourceInfo(val source: String, val pathOrCleanFQN: String, val linesInFile: Int) {
+data class SourceInfo(
+    val sourceFileName: String?,
+    val pathOrCleanFQN: String,
+    val linesInFile: Int
+) {
 
     companion object {
-        fun createInfo(element: KtElement?, internalClassName: String): SourceInfo {
+        fun createFromPsi(element: KtElement?, internalClassName: String): SourceInfo {
             assert(element != null) { "Couldn't create source mapper for null element $internalClassName" }
             val lineNumbers = CodegenUtil.getLineNumberForElement(element!!.containingFile, true)
-                    ?: error("Couldn't extract line count in ${element.containingFile}")
+                ?: error("Couldn't extract line count in ${element.containingFile}")
 
             //TODO hack condition for package parts cleaning
             val isTopLevel = element is KtFile || (element is KtNamedFunction && element.getParent() is KtFile)
             val cleanedClassFqName = if (!isTopLevel) internalClassName else internalClassName.substringBefore('$')
 
-            return SourceInfo(element.containingKtFile.name, cleanedClassFqName, lineNumbers)
+            val fileName = element.containingKtFile.name
+            return SourceInfo(fileName, cleanedClassFqName, lineNumbers)
         }
 
-        fun createInfoForIr(lineNumbers: Int, internalClassName: String, containingFileName: String): SourceInfo {
-            //TODO cut topLevel names
-//            val isTopLevel = element is KtFile || (element is KtNamedFunction && element.getParent() is KtFile)
-//            val cleanedClassFqName = if (!isTopLevel) internalClassName else internalClassName.substringBefore('$')
-
-            return SourceInfo(containingFileName, internalClassName, lineNumbers)
-        }
     }
 }
 

compiler/backend/src/org/jetbrains/kotlin/codegen/inline/InlineCodegen.kt

@@ -20,7 +20,6 @@ import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.incremental.components.Position
 import org.jetbrains.kotlin.incremental.components.ScopeKind
 import org.jetbrains.kotlin.name.ClassId
-import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.renderer.DescriptorRenderer
 import org.jetbrains.kotlin.resolve.DescriptorToSourceUtils
 import org.jetbrains.kotlin.resolve.DescriptorUtils
@@ -28,10 +27,8 @@ import org.jetbrains.kotlin.resolve.ImportedFromObjectCallableDescriptor
 import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall
 import org.jetbrains.kotlin.resolve.inline.InlineUtil
 import org.jetbrains.kotlin.resolve.inline.isInlineOnly
-import org.jetbrains.kotlin.resolve.isInlineClassType
 import org.jetbrains.kotlin.resolve.jvm.jvmSignature.JvmMethodSignature
 import org.jetbrains.kotlin.resolve.jvm.requiresFunctionNameManglingForReturnType
-import org.jetbrains.kotlin.resolve.scopes.MemberScope
 import org.jetbrains.kotlin.serialization.deserialization.descriptors.DescriptorWithContainerSource
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.types.TypeSystemCommonBackendContext
@@ -233,7 +230,7 @@ abstract class InlineCodegen<out T : BaseExpressionCodegen>(
         )
 
         val sourceInfo = sourceMapper.sourceInfo!!
-        val callSite = SourcePosition(codegen.lastLineNumber, sourceInfo.source, sourceInfo.pathOrCleanFQN)
+        val callSite = SourcePosition(codegen.lastLineNumber, sourceInfo.sourceFileName!!, sourceInfo.pathOrCleanFQN)
         val inliner = MethodInliner(
             node, parameters, info, FieldRemapper(null, null, parameters), isSameModule,
             "Method inlining " + sourceCompiler.callElementText,

compiler/backend/src/org/jetbrains/kotlin/codegen/inline/SMAP.kt

@@ -85,9 +85,14 @@ class SourceMapper(val sourceInfo: SourceInfo?) {
         get() = fileMappings.values.toList()
 
     init {
-        sourceInfo?.let {
-            // Explicitly map the file to itself -- we'll probably need a lot of lines from it, so this will produce fewer ranges.
-            getOrRegisterNewSource(it.source, it.pathOrCleanFQN).mapNewInterval(1, 1, it.linesInFile)
+        sourceInfo?.let { sourceInfo ->
+            // If 'sourceFileName' is null, this class doesn't have debug information
+            // (e.g., multi-file class facade with multiple parts).
+            sourceInfo.sourceFileName?.let { sourceFileName ->
+                // Explicitly map the file to itself -- we'll probably need a lot of lines from it, so this will produce fewer ranges.
+                getOrRegisterNewSource(sourceFileName, sourceInfo.pathOrCleanFQN)
+                    .mapNewInterval(1, 1, sourceInfo.linesInFile)
+            }
         }
     }