Revert "Remove obsolete check for language version and IR backends"

This check is no longer obsolete since language version 1.3 support is
restored for Kotlin/JVM, but JS and Native never supported LV 1.3.

This is a partial revert of 0213c25c9b,
without the diagnostic in K2JVMCompilerArguments (which is not needed
since the earliest supported LV is 1.3).

 #KT-50695 Fixed

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

@@ -574,6 +574,8 @@ abstract class CommonCompilerArguments : CommonToolArguments() {
             checkLanguageVersionIsStable(languageVersion, collector)
             checkOutdatedVersions(languageVersion, apiVersion, collector)
             checkProgressiveMode(languageVersion, collector)
+
+            checkIrSupport(languageVersionSettings, collector)
         }
 
         checkPlatformSpecificSettings(languageVersionSettings, collector)
@@ -652,6 +654,10 @@ abstract class CommonCompilerArguments : CommonToolArguments() {
     protected open fun checkPlatformSpecificSettings(languageVersionSettings: LanguageVersionSettings, collector: MessageCollector) {
     }
 
+    protected open fun checkIrSupport(languageVersionSettings: LanguageVersionSettings, collector: MessageCollector) {
+        // backend-specific
+    }
+
     private enum class VersionKind(val text: String) {
         LANGUAGE("Language"), API("API")
     }

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/K2JSCompilerArguments.kt

@@ -6,11 +6,10 @@
 package org.jetbrains.kotlin.cli.common.arguments
 
 import org.jetbrains.kotlin.cli.common.arguments.K2JsArgumentConstants.*
+import org.jetbrains.kotlin.cli.common.messages.CompilerMessageSeverity
 import org.jetbrains.kotlin.cli.common.messages.MessageCollector
-import org.jetbrains.kotlin.config.AnalysisFlag
+import org.jetbrains.kotlin.config.*
 import org.jetbrains.kotlin.config.AnalysisFlags.allowFullyQualifiedNameInKClass
-import org.jetbrains.kotlin.config.LanguageFeature
-import org.jetbrains.kotlin.config.LanguageVersion
 
 class K2JSCompilerArguments : CommonCompilerArguments() {
     companion object {
@@ -257,6 +256,19 @@ class K2JSCompilerArguments : CommonCompilerArguments() {
         }
     }
 
+    override fun checkIrSupport(languageVersionSettings: LanguageVersionSettings, collector: MessageCollector) {
+        if (!isIrBackendEnabled()) return
+
+        if (languageVersionSettings.languageVersion < LanguageVersion.KOTLIN_1_4
+            || languageVersionSettings.apiVersion < ApiVersion.KOTLIN_1_4
+        ) {
+            collector.report(
+                CompilerMessageSeverity.ERROR,
+                "IR backend cannot be used with language or API version below 1.4"
+            )
+        }
+    }
+
     override fun configureLanguageFeatures(collector: MessageCollector): MutableMap<LanguageFeature, LanguageFeature.State> {
         return super.configureLanguageFeatures(collector).apply {
             if (extensionFunctionsInExternals) {