JVM_IR: elide static field initialization to default values

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

@@ -446,10 +446,12 @@ class ExpressionCodegen(
     override fun visitSetField(expression: IrSetField, data: BlockInfo): PromisedValue {
         val expressionValue = expression.value
         // Do not add redundant field initializers that initialize to default values.
+        val inPrimaryConstructor = irFunction is IrConstructor && irFunction.isPrimary
+        val inClassInit = irFunction.origin == JvmLoweredDeclarationOrigin.CLASS_STATIC_INITIALIZER
         // "expression.origin == null" means that the field is initialized when it is declared,
         // i.e., not in an initializer block or constructor body.
-        val skip = irFunction is IrConstructor && irFunction.isPrimary &&
-                expression.origin == null && expressionValue is IrConst<*> &&
+        val isFieldInitializer = expression.origin == null
+        val skip = (inPrimaryConstructor || inClassInit) && isFieldInitializer && expressionValue is IrConst<*> &&
                 isDefaultValueForType(expression.symbol.owner.type.asmType, expressionValue.value)
         return if (skip) voidValue.coerce(expression.asmType) else super.visitSetField(expression, data)
     }