From 951b8026f505dda2130486eac0d9680cbb41a5bb Mon Sep 17 00:00:00 2001
From: Svyatoslav Kuzmich <svyatoslav.kuzmich@jetbrains.com>
Date: Tue, 17 Jan 2023 09:14:57 +0000
Subject: [PATCH] [JS, Wasm] Don't generate unused constructors for interfaces

---
 .../kotlin/ir/backend/js/lower/PrimaryConstructorLowering.kt   | 3 ++-
 js/js.translator/testData/lineNumbers/delegation.kt            | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/PrimaryConstructorLowering.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/PrimaryConstructorLowering.kt
index c81f4d6933a..40e450ad18b 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/PrimaryConstructorLowering.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/PrimaryConstructorLowering.kt
@@ -17,6 +17,7 @@ import org.jetbrains.kotlin.ir.expressions.IrInstanceInitializerCall
 import org.jetbrains.kotlin.ir.expressions.impl.IrDelegatingConstructorCallImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrInstanceInitializerCallImpl
 import org.jetbrains.kotlin.ir.util.constructors
+import org.jetbrains.kotlin.ir.util.isInterface
 import org.jetbrains.kotlin.ir.util.parentAsClass
 import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid
 import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
@@ -27,7 +28,7 @@ class PrimaryConstructorLowering(val context: JsCommonBackendContext) : Declarat
     private var IrClass.syntheticPrimaryConstructor by context.mapping.classToSyntheticPrimaryConstructor
 
     override fun transformFlat(declaration: IrDeclaration): List<IrDeclaration>? {
-        if (declaration is IrClass) {
+        if (declaration is IrClass && !declaration.isInterface) {
             val constructors = declaration.constructors
 
             if (constructors.any { it.isPrimary }) return null
diff --git a/js/js.translator/testData/lineNumbers/delegation.kt b/js/js.translator/testData/lineNumbers/delegation.kt
index 0dd62f08991..54bd8d74f74 100644
--- a/js/js.translator/testData/lineNumbers/delegation.kt
+++ b/js/js.translator/testData/lineNumbers/delegation.kt
@@ -19,4 +19,4 @@ val o = object : I {
 }
 
 // LINES(JS):    1 2 3 2 2 2 2 2 2 2 * 11 12 12 12 15 15 15 16 18 17 17
-// LINES(JS_IR): 11 11 * 11 11 * 1 1 3 3 1 1 1 1 1 1 1 1 1 5 11 11 12 12 12 16 17 17 15 15 15 * 1 * 11
+// LINES(JS_IR): 11 11 * 11 11 * 1 1 3 3 1 1 1 1 1 1 1 1 1 * 11 11 12 12 12 16 17 17 15 15 15 * 1 * 11