[JVM IR] Add tests for KT-15971.

compiler/fir/fir2ir/tests/org/jetbrains/kotlin/codegen/ir/FirBlackBoxCodegenTestGenerated.java

@@ -8535,6 +8535,21 @@ public class FirBlackBoxCodegenTestGenerated extends AbstractFirBlackBoxCodegenT
                 runTest("compiler/testData/codegen/box/defaultArguments/function/innerExtentionFunctionManyArgs.kt");
             }
 
+            @TestMetadata("kt15971.kt")
+            public void testKt15971() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971.kt");
+            }
+
+            @TestMetadata("kt15971_2.kt")
+            public void testKt15971_2() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971_2.kt");
+            }
+
+            @TestMetadata("kt15971_3.kt")
+            public void testKt15971_3() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971_3.kt");
+            }
+
             @TestMetadata("kt36188.kt")
             public void testKt36188() throws Exception {
                 runTest("compiler/testData/codegen/box/defaultArguments/function/kt36188.kt");

compiler/testData/codegen/box/defaultArguments/function/kt15971.kt

@@ -0,0 +1,19 @@
+// IGNORE_BACKEND_FIR: JVM_IR
+// IGNORE_BACKEND: JVM
+interface Q {
+    fun foo(a: Double): Double
+}
+
+interface Z {
+    fun foo(a: Double = 1.0): Double
+}
+
+class R : Q, Z {
+    override fun foo(a: Double) = a
+}
+
+fun box(): String {
+    if (R().foo() != 1.0) return "fail 1"
+    if (R().foo(2.0) != 2.0) return "fail 2"
+    return "OK"
+}

compiler/testData/codegen/box/defaultArguments/function/kt15971_2.kt

@@ -0,0 +1,19 @@
+// IGNORE_BACKEND_FIR: JVM_IR
+// IGNORE_BACKEND: JVM
+interface Q {
+    fun foo(a: Double) = 0.0
+}
+
+interface Z {
+    fun foo(a: Double = 1.0): Double
+}
+
+class R : Q, Z {
+    override fun foo(a: Double) = a
+}
+
+fun box(): String {
+    if (R().foo() != 1.0) return "fail 1"
+    if (R().foo(2.0) != 2.0) return "fail 2"
+    return "OK"
+}

compiler/testData/codegen/box/defaultArguments/function/kt15971_3.kt

@@ -0,0 +1,19 @@
+// IGNORE_BACKEND_FIR: JVM_IR
+// IGNORE_BACKEND: JVM
+interface Q {
+    fun foo(a: Double): Double
+}
+
+interface Z {
+    fun foo(a: Double = 1.0) = 0.0
+}
+
+class R : Q, Z {
+    override fun foo(a: Double) = a
+}
+
+fun box(): String {
+    if (R().foo() != 1.0) return "fail 1"
+    if (R().foo(2.0) != 2.0) return "fail 2"
+    return "OK"
+}

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

@@ -9680,6 +9680,21 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
                 runTest("compiler/testData/codegen/box/defaultArguments/function/innerExtentionFunctionManyArgs.kt");
             }
 
+            @TestMetadata("kt15971.kt")
+            public void testKt15971() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971.kt");
+            }
+
+            @TestMetadata("kt15971_2.kt")
+            public void testKt15971_2() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971_2.kt");
+            }
+
+            @TestMetadata("kt15971_3.kt")
+            public void testKt15971_3() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971_3.kt");
+            }
+
             @TestMetadata("kt36188.kt")
             public void testKt36188() throws Exception {
                 runTest("compiler/testData/codegen/box/defaultArguments/function/kt36188.kt");

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

@@ -9592,6 +9592,21 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
                 runTest("compiler/testData/codegen/box/defaultArguments/function/funInTraitChain.kt");
             }
 
+            @TestMetadata("kt15971.kt")
+            public void ignoreKt15971() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971.kt");
+            }
+
+            @TestMetadata("kt15971_2.kt")
+            public void ignoreKt15971_2() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971_2.kt");
+            }
+
+            @TestMetadata("kt15971_3.kt")
+            public void ignoreKt15971_3() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971_3.kt");
+            }
+
             private void runTest(String testDataFilePath) throws Exception {
                 KotlinTestUtils.runTest(this::doTest, TargetBackend.JVM, testDataFilePath);
             }

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

@@ -8535,6 +8535,21 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
                 runTest("compiler/testData/codegen/box/defaultArguments/function/innerExtentionFunctionManyArgs.kt");
             }
 
+            @TestMetadata("kt15971.kt")
+            public void testKt15971() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971.kt");
+            }
+
+            @TestMetadata("kt15971_2.kt")
+            public void testKt15971_2() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971_2.kt");
+            }
+
+            @TestMetadata("kt15971_3.kt")
+            public void testKt15971_3() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971_3.kt");
+            }
+
             @TestMetadata("kt36188.kt")
             public void testKt36188() throws Exception {
                 runTest("compiler/testData/codegen/box/defaultArguments/function/kt36188.kt");

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

@@ -7245,6 +7245,21 @@ public class IrJsCodegenBoxTestGenerated extends AbstractIrJsCodegenBoxTest {
                 runTest("compiler/testData/codegen/box/defaultArguments/function/innerExtentionFunctionManyArgs.kt");
             }
 
+            @TestMetadata("kt15971.kt")
+            public void testKt15971() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971.kt");
+            }
+
+            @TestMetadata("kt15971_2.kt")
+            public void testKt15971_2() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971_2.kt");
+            }
+
+            @TestMetadata("kt15971_3.kt")
+            public void testKt15971_3() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971_3.kt");
+            }
+
             @TestMetadata("kt36188.kt")
             public void testKt36188() throws Exception {
                 runTest("compiler/testData/codegen/box/defaultArguments/function/kt36188.kt");

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

@@ -7245,6 +7245,21 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
                 runTest("compiler/testData/codegen/box/defaultArguments/function/innerExtentionFunctionManyArgs.kt");
             }
 
+            @TestMetadata("kt15971.kt")
+            public void testKt15971() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971.kt");
+            }
+
+            @TestMetadata("kt15971_2.kt")
+            public void testKt15971_2() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971_2.kt");
+            }
+
+            @TestMetadata("kt15971_3.kt")
+            public void testKt15971_3() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971_3.kt");
+            }
+
             @TestMetadata("kt36188.kt")
             public void testKt36188() throws Exception {
                 runTest("compiler/testData/codegen/box/defaultArguments/function/kt36188.kt");