JVM_IR: Support @JvmSynthetic annotations.

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/ClassCodegen.kt

@@ -37,6 +37,7 @@ import org.jetbrains.kotlin.load.kotlin.header.KotlinClassHeader
 import org.jetbrains.kotlin.name.SpecialNames
 import org.jetbrains.kotlin.resolve.DescriptorUtils
 import org.jetbrains.kotlin.resolve.jvm.AsmTypes
+import org.jetbrains.kotlin.resolve.jvm.annotations.JVM_SYNTHETIC_ANNOTATION_FQ_NAME
 import org.jetbrains.kotlin.resolve.jvm.annotations.TRANSIENT_ANNOTATION_FQ_NAME
 import org.jetbrains.kotlin.resolve.jvm.annotations.VOLATILE_ANNOTATION_FQ_NAME
 import org.jetbrains.kotlin.resolve.jvm.diagnostics.JvmDeclarationOrigin
@@ -346,7 +347,8 @@ private val IrField.flags: Int
             (if (isFinal) Opcodes.ACC_FINAL else 0) or
             (if (isStatic) Opcodes.ACC_STATIC else 0) or
             (if (hasAnnotation(VOLATILE_ANNOTATION_FQ_NAME)) Opcodes.ACC_VOLATILE else 0) or
-            (if (hasAnnotation(TRANSIENT_ANNOTATION_FQ_NAME)) Opcodes.ACC_TRANSIENT else 0)
+            (if (hasAnnotation(TRANSIENT_ANNOTATION_FQ_NAME)) Opcodes.ACC_TRANSIENT else 0) or
+            (if (hasAnnotation(JVM_SYNTHETIC_ANNOTATION_FQ_NAME)) Opcodes.ACC_SYNTHETIC else 0)
 
 private val IrDeclarationOrigin.flags: Int
     get() = (if (isSynthetic) Opcodes.ACC_SYNTHETIC else 0) or

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/FunctionCodegen.kt

@@ -14,6 +14,7 @@ import org.jetbrains.kotlin.ir.expressions.*
 import org.jetbrains.kotlin.ir.util.*
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.resolve.jvm.AsmTypes
+import org.jetbrains.kotlin.resolve.jvm.annotations.JVM_SYNTHETIC_ANNOTATION_FQ_NAME
 import org.jetbrains.kotlin.resolve.jvm.annotations.STRICTFP_ANNOTATION_FQ_NAME
 import org.jetbrains.kotlin.resolve.jvm.annotations.SYNCHRONIZED_ANNOTATION_FQ_NAME
 import org.jetbrains.kotlin.resolve.jvm.jvmSignature.JvmMethodGenericSignature
@@ -87,9 +88,12 @@ open class FunctionCodegen(
             else -> if (classCodegen.irClass.isJvmInterface && irFunction.body == null) Opcodes.ACC_ABSTRACT else 0 //TODO transform interface modality on lowering to DefaultImpls
         }
         val nativeFlag = if (irFunction.isExternal) Opcodes.ACC_NATIVE else 0
-        val syntheticFlag = if (irFunction.origin.isSynthetic) Opcodes.ACC_SYNTHETIC else 0
+        val syntheticFlag =
+            if (irFunction.origin.isSynthetic || irFunction.hasAnnotation(JVM_SYNTHETIC_ANNOTATION_FQ_NAME)) Opcodes.ACC_SYNTHETIC
+            else 0
         val strictFpFlag = if (irFunction.hasAnnotation(STRICTFP_ANNOTATION_FQ_NAME)) Opcodes.ACC_STRICT else 0
         val synchronizedFlag = if (irFunction.hasAnnotation(SYNCHRONIZED_ANNOTATION_FQ_NAME)) Opcodes.ACC_SYNCHRONIZED else 0
+
         return visibility or
                 modalityFlag or
                 staticFlag or

compiler/testData/codegen/box/annotations/jvmAnnotationFlags.kt

@@ -17,6 +17,21 @@ class C {
 
     @Strictfp fun str() {}
     @Synchronized fun sync() {}
+
+    @JvmSynthetic val synth = "ABC"
+
+    var synth2 = 5
+        @JvmSynthetic public get
+        @JvmSynthetic public set
+
+    @field:JvmSynthetic
+    val synth3 = 0
+
+    @get:JvmSynthetic @set:JvmSynthetic
+    var synth4 = 0
+
+    @JvmSynthetic
+    fun synth5() {}
 }
 
 fun box(): String {
@@ -29,5 +44,21 @@ fun box(): String {
     if (c.getDeclaredMethod("str").getModifiers() and Modifier.STRICT == 0) return "Fail: strict"
     if (c.getDeclaredMethod("sync").getModifiers() and Modifier.SYNCHRONIZED == 0) return "Fail: synchronized"
 
+    if (!c.getDeclaredField("synth").isSynthetic()) return "Fail: synthetic"
+    if (c.getDeclaredMethod("getSynth").isSynthetic()) return "Fail: get synthetic"
+
+    if (c.getDeclaredField("synth2").isSynthetic()) return "Fail: synthetic 2"
+    if (!c.getDeclaredMethod("getSynth2").isSynthetic()) return "Fail: get synthetic 2"
+    if (!c.getDeclaredMethod("setSynth2", Int::class.java).isSynthetic()) return "Fail: set synthetic 2"
+
+    if (!c.getDeclaredField("synth3").isSynthetic()) return "Fail: synthetic 3"
+    if (c.getDeclaredMethod("getSynth3").isSynthetic()) return "Fail: get synthetic 3"
+
+    if (c.getDeclaredField("synth4").isSynthetic()) return "Fail: synthetic 4"
+    if (!c.getDeclaredMethod("getSynth4").isSynthetic()) return "Fail: get synthetic 4"
+    if (!c.getDeclaredMethod("setSynth4", Int::class.java).isSynthetic()) return "Fail: set synthetic 4"
+
+    if (!c.getDeclaredMethod("synth5").isSynthetic()) return "Fail: synthetic 5"
+
     return "OK"
 }