Deprecate -Xuse-experimental #KT-47623 Fixed

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/CommonCompilerArguments.kt

@@ -18,6 +18,7 @@ package org.jetbrains.kotlin.cli.common.arguments
 
 import com.intellij.util.xmlb.annotations.Transient
 import org.jetbrains.kotlin.cli.common.messages.CompilerMessageSeverity
+import org.jetbrains.kotlin.cli.common.messages.CompilerMessageSeverity.WARNING
 import org.jetbrains.kotlin.cli.common.messages.MessageCollector
 import org.jetbrains.kotlin.config.*
 import java.util.*
@@ -379,9 +380,13 @@ abstract class CommonCompilerArguments : CommonToolArguments() {
             val experimentalFqNames = experimental?.toList().orEmpty()
             if (experimentalFqNames.isNotEmpty()) {
                 put(AnalysisFlags.experimental, experimentalFqNames)
-                collector.report(CompilerMessageSeverity.WARNING, "'-Xexperimental' is deprecated and will be removed in a future release")
+                collector.report(WARNING, "'-Xexperimental' is deprecated and will be removed in a future release")
             }
-            put(AnalysisFlags.useExperimental, useExperimental?.toList().orEmpty() + optIn?.toList().orEmpty())
+            val useExperimentalFqNames = useExperimental?.toList().orEmpty()
+            if (useExperimentalFqNames.isNotEmpty()) {
+                collector.report(WARNING, "'-Xuse-experimental' is deprecated and will be removed in a future release")
+            }
+            put(AnalysisFlags.useExperimental, useExperimentalFqNames + optIn?.toList().orEmpty())
             put(AnalysisFlags.expectActualLinker, expectActualLinker)
             put(AnalysisFlags.explicitApiVersion, apiVersion != null)
             put(AnalysisFlags.allowResultReturnType, allowResultReturnType)

compiler/testData/cli/jvm/experimentalDeprecatedWarning.args

@@ -4,3 +4,4 @@ $TEMP_DIR$
 -Xopt-in=kotlin.RequiresOptIn
 -Xopt-in=org.test.Warning1
 -Xexperimental=org.test.Warning2
+-Xuse-experimental=org.test.OneMore

compiler/testData/cli/jvm/experimentalDeprecatedWarning.kt

@@ -9,3 +9,6 @@ annotation class Warning1
 @RequiresOptIn
 @Retention(AnnotationRetention.BINARY)
 annotation class Warning2
+
+@RequiresOptIn
+annotation class OneMore

compiler/testData/cli/jvm/experimentalDeprecatedWarning.out

@@ -1,4 +1,5 @@
 warning: '-Xexperimental' is deprecated and will be removed in a future release
+warning: '-Xuse-experimental' is deprecated and will be removed in a future release
 warning: opt-in requirement marker org.test.Warning2 is deprecated. Warning2
 warning: opt-in requirement marker org.test.Warning1 is deprecated. Warning1
 OK