Enable lightweight lambdas (aka invokedynamic) since 2.0

#KT-45375 Fixed
 #KT-58173 Open

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/backend/handlers/DebugRunner.kt

@@ -191,13 +191,16 @@ class SteppingDebugRunner(testServices: TestServices) : DebugRunner(testServices
     override fun storeStep(loggedItems: ArrayList<SteppingTestLoggedData>, event: Event) {
         assert(event is LocatableEvent)
         val location = (event as LocatableEvent).location()
-        loggedItems.add(
-            SteppingTestLoggedData(
+        val data =
+            if (isIndyLambda(location)) {
+                // Invokedynamic lambdas are not synthetic in JDI, and they don't have source information.
+                SteppingTestLoggedData(-1, true, "<lambda>")
+            } else SteppingTestLoggedData(
                 location.lineNumber(),
                 location.method().isSynthetic,
                 location.formatAsExpectation()
             )
-        )
+        loggedItems.add(data)
     }
 }
 
@@ -234,12 +237,18 @@ class LocalVariableDebugRunner(testServices: TestServices) : DebugRunner(testSer
             // Local variable table completely absent - not distinguished from an empty table.
             listOf()
         }
-        loggedItems.add(
-            SteppingTestLoggedData(
+        val data =
+            if (isIndyLambda(location)) {
+                // Invokedynamic lambdas are not synthetic in JDI, and they don't have source information.
+                SteppingTestLoggedData(-1, true, "<lambda>")
+            } else SteppingTestLoggedData(
                 location.lineNumber(),
                 false,
                 location.formatAsExpectation(visibleVars)
             )
-        )
+        loggedItems.add(data)
     }
 }
+
+private fun isIndyLambda(location: Location): Boolean =
+    "$\$Lambda$" in location.declaringType().name()

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/backend/handlers/SMAPDumpHandler.kt

@@ -14,6 +14,7 @@ import org.jetbrains.kotlin.test.directives.CodegenTestDirectives.NO_SMAP_DUMP
 import org.jetbrains.kotlin.test.directives.CodegenTestDirectives.SEPARATE_SMAP_DUMPS
 import org.jetbrains.kotlin.test.directives.model.DirectivesContainer
 import org.jetbrains.kotlin.test.model.BinaryArtifacts
+import org.jetbrains.kotlin.test.model.FrontendKinds
 import org.jetbrains.kotlin.test.model.TestModule
 import org.jetbrains.kotlin.test.services.TestServices
 import org.jetbrains.kotlin.test.services.moduleStructure
@@ -77,7 +78,11 @@ class SMAPDumpHandler(testServices: TestServices) : JvmBinaryArtifactHandler(tes
         }
 
         val testDataFile = testServices.moduleStructure.originalTestDataFiles.first()
-        val expectedFile = testDataFile.withExtension(extension)
+        val firExpectedFile = testDataFile.withExtension("fir.$extension")
+        val expectedFile =
+            if (testServices.moduleStructure.modules.first().frontendKind == FrontendKinds.FIR && firExpectedFile.exists())
+                firExpectedFile
+            else testDataFile.withExtension(extension)
         assertions.assertEqualsToFile(expectedFile, dumper.generateResultingDump())
 
         if (separateDumpEnabled && isSeparateCompilation) {

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/utils/SteppingTestUtils.kt

@@ -46,10 +46,14 @@ class LocalVariableRecord(
             append(variableType)
         }
         append("=")
-        append(value)
+        append(value.toString().normalizeIndyLambdas())
     }
 }
 
+private fun String.normalizeIndyLambdas(): String =
+    // Invokedynamic lambdas have an unstable hash in the name.
+    replace("\\\$Lambda\\\$.*".toRegex(), "<lambda>")
+
 private const val EXPECTATIONS_MARKER = "// EXPECTATIONS"
 private const val FORCE_STEP_INTO_MARKER = "// FORCE_STEP_INTO"