Separate JvmTarget::bytecodeVersion version into major/minor parts

compiler/backend/src/org/jetbrains/kotlin/codegen/state/GenerationState.kt

@@ -201,7 +201,7 @@ class GenerationState private constructor(
 
     val target = configuration.get(JVMConfigurationKeys.JVM_TARGET) ?: JvmTarget.DEFAULT
     val runtimeStringConcat =
-        if (target.bytecodeVersion >= JvmTarget.JVM_9.bytecodeVersion)
+        if (target.majorVersion >= JvmTarget.JVM_9.majorVersion)
             configuration.get(JVMConfigurationKeys.STRING_CONCAT) ?: JvmStringConcat.INLINE
         else JvmStringConcat.INLINE
 

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/jvmArguments.kt

@@ -39,7 +39,7 @@ fun CompilerConfiguration.setupJvmSpecificArguments(arguments: K2JVMCompilerArgu
     }
 
     val jvmTarget = get(JVMConfigurationKeys.JVM_TARGET) ?: JvmTarget.DEFAULT
-    if (jvmTarget.bytecodeVersion < JvmTarget.JVM_1_8.bytecodeVersion) {
+    if (jvmTarget.majorVersion < JvmTarget.JVM_1_8.majorVersion) {
         val jvmDefaultMode = languageVersionSettings.getFlag(JvmAnalysisFlags.jvmDefaultMode)
         if (jvmDefaultMode.forAllMethodsWithBody) {
             messageCollector.report(
@@ -53,7 +53,7 @@ fun CompilerConfiguration.setupJvmSpecificArguments(arguments: K2JVMCompilerArgu
         val runtimeStringConcat = JvmStringConcat.fromString(arguments.stringConcat!!)
         if (runtimeStringConcat != null) {
             put(JVMConfigurationKeys.STRING_CONCAT, runtimeStringConcat)
-            if (jvmTarget.bytecodeVersion < JvmTarget.JVM_9.bytecodeVersion && runtimeStringConcat != JvmStringConcat.INLINE) {
+            if (jvmTarget.majorVersion < JvmTarget.JVM_9.majorVersion && runtimeStringConcat != JvmStringConcat.INLINE) {
                 messageCollector.report(
                     WARNING,
                     "`-Xstring-concat=${arguments.stringConcat}` does nothing with JVM target `${jvmTarget.description}`."

compiler/config.jvm/src/org/jetbrains/kotlin/config/JvmTarget.kt

@@ -21,34 +21,33 @@ import org.jetbrains.org.objectweb.asm.Opcodes
 
 enum class JvmTarget(
     override val description: String,
+    val majorVersion: Int,
     val descriptionForJavacArgument: String = description,
     val isPreview: Boolean = false,
 ) : TargetPlatformVersion {
-    JVM_1_6("1.6"),
+    JVM_1_6("1.6", Opcodes.V1_6),
-    JVM_1_8("1.8"),
+    JVM_1_8("1.8", Opcodes.V1_8),
-    JVM_9("9"),
+    JVM_9("9", Opcodes.V9),
-    JVM_10("10"),
+    JVM_10("10", Opcodes.V10),
-    JVM_11("11"),
+    JVM_11("11", Opcodes.V11),
-    JVM_12("12"),
+    JVM_12("12", Opcodes.V12),
-    JVM_13("13"),
+    JVM_13("13", Opcodes.V13),
-    JVM_14("14"),
+    JVM_14("14", Opcodes.V14),
-    JVM_15("15"),
+    JVM_15("15", Opcodes.V15),
-    JVM_15_PREVIEW("15_PREVIEW", descriptionForJavacArgument = "15", isPreview = true),
+    JVM_15_PREVIEW(
+        "15_PREVIEW", Opcodes.V15,
+        descriptionForJavacArgument = "15", isPreview = true
+    ),
     ;
 
+    val minorVersion: Int =
+        if (isPreview)
+            0xffff
+        else
+            0
+
     val bytecodeVersion: Int by lazy {
-        when (this) {
+        (minorVersion shl 16) + majorVersion
-            JVM_1_6 -> Opcodes.V1_6
-            JVM_1_8 -> Opcodes.V1_8
-            JVM_9 -> Opcodes.V9
-            JVM_10 -> Opcodes.V10
-            JVM_11 -> Opcodes.V11
-            JVM_12 -> Opcodes.V12
-            JVM_13 -> Opcodes.V13
-            JVM_14 -> Opcodes.V14
-            JVM_15 -> Opcodes.V15
-            JVM_15_PREVIEW -> Opcodes.V15 + (0xffff shl 16)
-        }
     }
 
     companion object {

compiler/frontend.java/src/org/jetbrains/kotlin/resolve/jvm/checkers/InlinePlatformCompatibilityChecker.kt

@@ -62,7 +62,7 @@ class InlinePlatformCompatibilityChecker(val jvmTarget: JvmTarget, languageVersi
 
         val propertyOrFun = DescriptorUtils.getDirectMember(resultingDescriptor)
 
-        val compilingBytecodeVersion = jvmTarget.bytecodeVersion
+        val compilingBytecodeVersion = jvmTarget.majorVersion
         if (!properError) {
             val inliningBytecodeVersion = getBytecodeVersionIfDeserializedDescriptor(propertyOrFun, false)
             if (inliningBytecodeVersion != null && compilingBytecodeVersion < inliningBytecodeVersion) {

compiler/frontend.java/src/org/jetbrains/kotlin/resolve/jvm/checkers/declarationCheckers.kt

@@ -59,7 +59,7 @@ class LocalFunInlineChecker : DeclarationChecker {
 }
 
 class JvmStaticChecker(jvmTarget: JvmTarget, languageVersionSettings: LanguageVersionSettings) : DeclarationChecker {
-    private val isLessJVM18 = jvmTarget.bytecodeVersion < JvmTarget.JVM_1_8.bytecodeVersion
+    private val isLessJVM18 = jvmTarget.majorVersion < JvmTarget.JVM_1_8.majorVersion
 
     private val supportJvmStaticInInterface = languageVersionSettings.supportsFeature(LanguageFeature.JvmStaticInInterface)
 

compiler/tests-common/tests/org/jetbrains/kotlin/codegen/CodegenTestCase.java

@@ -460,7 +460,7 @@ public abstract class CodegenTestCase extends KotlinBaseTest<KotlinBaseTest.Test
             JvmTarget customDefaultTarget = JvmTarget.fromString(DEFAULT_JVM_TARGET);
             assert customDefaultTarget != null : "Can't construct JvmTarget for " + DEFAULT_JVM_TARGET;
             JvmTarget originalTarget = configuration.get(JVMConfigurationKeys.JVM_TARGET);
-            if (originalTarget == null || customDefaultTarget.getBytecodeVersion() > originalTarget.getBytecodeVersion()) {
+            if (originalTarget == null || customDefaultTarget.getMajorVersion() > originalTarget.getMajorVersion()) {
                 // It's not safe to substitute target in general
                 // cause it can affect generated bytecode and original behaviour should be tested somehow.
                 // Original behaviour testing is perfomed by