IrInterpreter: interpret IrGetField properly

compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/IrCompileTimeChecker.kt

@@ -168,6 +168,13 @@ class IrCompileTimeChecker(
 
     override fun visitGetField(expression: IrGetField, data: Nothing?): Boolean {
         val owner = expression.symbol.owner
+        if (owner.origin == IrDeclarationOrigin.PROPERTY_BACKING_FIELD && owner.correspondingPropertySymbol?.owner?.isConst == true) {
+            val receiverComputable = expression.receiver?.accept(this, null) ?: true
+            val initializerComputable = owner.initializer?.accept(this, null) ?: false
+            if (receiverComputable && initializerComputable) {
+                return true
+            }
+        }
         val parent = owner.parent as IrSymbolOwner
         val isJavaPrimitiveStatic = owner.origin == IrDeclarationOrigin.IR_EXTERNAL_JAVA_DECLARATION_STUB && owner.isStatic &&
                 (owner.type.isPrimitiveType() || owner.type.isStringClassType())

compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/IrInterpreter.kt

@@ -540,6 +540,9 @@ class IrInterpreter(private val irBuiltIns: IrBuiltIns, private val bodyMap: Map
             stack.pushReturnValue(Wrapper.getStaticGetter(field)!!.invokeWithArguments().toState(field.type))
             return Next
         }
+        if (field.origin == IrDeclarationOrigin.PROPERTY_BACKING_FIELD && field.correspondingPropertySymbol?.owner?.isConst == true) {
+            return field.initializer?.expression?.interpret() ?: Next
+        }
         // receiver is null, for example, for top level fields
         val result = receiver?.let { stack.getVariable(receiver).state.getState(field.correspondingPropertySymbol!!) }
             ?: return (expression.symbol.owner.initializer?.expression?.interpret() ?: Next)