diff --git a/compiler/backend/src/org/jetbrains/kotlin/codegen/AsmUtil.java b/compiler/backend/src/org/jetbrains/kotlin/codegen/AsmUtil.java
index 4db5e9cfc45..be7c8ae55e3 100644
--- a/compiler/backend/src/org/jetbrains/kotlin/codegen/AsmUtil.java
+++ b/compiler/backend/src/org/jetbrains/kotlin/codegen/AsmUtil.java
@@ -76,8 +76,6 @@ import static org.jetbrains.org.objectweb.asm.Opcodes.*;
 
 public class AsmUtil {
 
-    public static final boolean IS_BUILT_WITH_ASM6 = Opcodes.API_VERSION <= Opcodes.ASM6;
-
     private static final Set<Type> STRING_BUILDER_OBJECT_APPEND_ARG_TYPES = Sets.newHashSet(
             getType(String.class),
             getType(StringBuffer.class),
diff --git a/compiler/backend/src/org/jetbrains/kotlin/codegen/FunctionCodegen.java b/compiler/backend/src/org/jetbrains/kotlin/codegen/FunctionCodegen.java
index 1bd6dba4a4a..fa613bd2036 100644
--- a/compiler/backend/src/org/jetbrains/kotlin/codegen/FunctionCodegen.java
+++ b/compiler/backend/src/org/jetbrains/kotlin/codegen/FunctionCodegen.java
@@ -520,22 +520,9 @@ public class FunctionCodegen {
 
         Iterator<ValueParameterDescriptor> iterator = valueParameters.iterator();
         List<JvmMethodParameterSignature> kotlinParameterTypes = jvmSignature.getValueParameters();
-        int syntheticParameterCount = 0;
-        for (int i = 0; i < kotlinParameterTypes.size(); i++) {
-            JvmMethodParameterSignature parameterSignature = kotlinParameterTypes.get(i);
-            JvmMethodParameterKind kind = parameterSignature.getKind();
-            if (kind.isSkippedInGenericSignature()) {
-                if (AsmUtil.IS_BUILT_WITH_ASM6) {
-                    markEnumOrInnerConstructorParameterAsSynthetic(mv, i, state.getClassBuilderMode());
-                }
-                else {
-                    syntheticParameterCount++;
-                }
-            }
-        }
-        if (!AsmUtil.IS_BUILT_WITH_ASM6) {
-            Asm7UtilKt.visitAnnotableParameterCount(mv, kotlinParameterTypes.size() - syntheticParameterCount);
-        }
+        int syntheticParameterCount = CollectionsKt.count(kotlinParameterTypes, signature -> signature.getKind().isSkippedInGenericSignature());
+
+        Asm7UtilKt.visitAnnotableParameterCount(mv, kotlinParameterTypes.size() - syntheticParameterCount);
 
         for (int i = 0; i < kotlinParameterTypes.size(); i++) {
             JvmMethodParameterSignature parameterSignature = kotlinParameterTypes.get(i);
@@ -553,25 +540,12 @@ public class FunctionCodegen {
 
             if (annotated != null) {
                 //noinspection ConstantConditions
-                AnnotationCodegen.forParameter(AsmUtil.IS_BUILT_WITH_ASM6 ? i : i - syntheticParameterCount, mv, innerClassConsumer, state)
+                AnnotationCodegen.forParameter(i - syntheticParameterCount, mv, innerClassConsumer, state)
                         .genAnnotations(annotated, parameterSignature.getAsmType());
             }
         }
     }
 
-    private static void markEnumOrInnerConstructorParameterAsSynthetic(MethodVisitor mv, int i, ClassBuilderMode mode) {
-        // IDEA's ClsPsi builder fails to annotate synthetic parameters
-        if (mode == ClassBuilderMode.LIGHT_CLASSES) return;
-
-        // This is needed to avoid RuntimeInvisibleParameterAnnotations error in javac:
-        // see MethodWriter.visitParameterAnnotation()
-
-        AnnotationVisitor av = mv.visitParameterAnnotation(i, "Ljava/lang/Synthetic;", true);
-        if (av != null) {
-            av.visitEnd();
-        }
-    }
-
     @Nullable
     private static Type getThisTypeForFunction(
             @NotNull FunctionDescriptor functionDescriptor,
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/FunctionCodegen.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/FunctionCodegen.kt
index 6854528fb2c..d52e1bb9688 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/FunctionCodegen.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/FunctionCodegen.kt
@@ -221,22 +221,9 @@ private fun generateParameterAnnotations(
 ) {
     val iterator = irFunction.valueParameters.iterator()
     val kotlinParameterTypes = jvmSignature.valueParameters
-    var syntheticParameterCount = 0
-    kotlinParameterTypes.forEachIndexed { i, parameterSignature ->
-        val kind = parameterSignature.kind
-        if (kind.isSkippedInGenericSignature) {
-            if (AsmUtil.IS_BUILT_WITH_ASM6) {
-                // This is needed to avoid RuntimeInvisibleParameterAnnotations error in javac:
-                // see MethodWriter.visitParameterAnnotation()
-                mv.visitParameterAnnotation(i, "Ljava/lang/Synthetic;", true)?.visitEnd()
-            } else {
-                syntheticParameterCount++
-            }
-        }
-    }
-    if (!AsmUtil.IS_BUILT_WITH_ASM6) {
-        visitAnnotableParameterCount(mv, kotlinParameterTypes.size - syntheticParameterCount)
-    }
+    val syntheticParameterCount = kotlinParameterTypes.count { it.kind.isSkippedInGenericSignature }
+
+    visitAnnotableParameterCount(mv, kotlinParameterTypes.size - syntheticParameterCount)
 
     kotlinParameterTypes.forEachIndexed { i, parameterSignature ->
         val kind = parameterSignature.kind
@@ -248,7 +235,7 @@ private fun generateParameterAnnotations(
         if (!kind.isSkippedInGenericSignature) {
             AnnotationCodegen(innerClassConsumer, context) { descriptor, visible ->
                 mv.visitParameterAnnotation(
-                    if (AsmUtil.IS_BUILT_WITH_ASM6) i else i - syntheticParameterCount,
+                    i - syntheticParameterCount,
                     descriptor,
                     visible
                 )
diff --git a/plugins/kapt3/kapt3-compiler/src/org/jetbrains/kotlin/kapt3/stubs/parseParameters.kt b/plugins/kapt3/kapt3-compiler/src/org/jetbrains/kotlin/kapt3/stubs/parseParameters.kt
index bc750136ff0..840a3a2e69a 100644
--- a/plugins/kapt3/kapt3-compiler/src/org/jetbrains/kotlin/kapt3/stubs/parseParameters.kt
+++ b/plugins/kapt3/kapt3-compiler/src/org/jetbrains/kotlin/kapt3/stubs/parseParameters.kt
@@ -74,7 +74,7 @@ internal fun MethodNode.getParametersInfo(containingClass: ClassNode, isInnerCla
             name = "p${index - startParameterIndex}"
         }
 
-        val indexForAnnotation = if (AsmUtil.IS_BUILT_WITH_ASM6) index else index - startParameterIndex
+        val indexForAnnotation = index - startParameterIndex
         val visibleAnnotations = visibleParameterAnnotations?.get(indexForAnnotation)
         val invisibleAnnotations = invisibleParameterAnnotations?.get(indexForAnnotation)
         parameterInfos += ParameterInfo(0, name, type, visibleAnnotations, invisibleAnnotations)