org.jetbrains.kotlin.backend.jvm.lower.JvmTailrecLowering.kt Maven / Gradle / Ivy
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/*
* Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
* Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
*/
package org.jetbrains.kotlin.backend.jvm.lower
import org.jetbrains.kotlin.backend.common.lower.LoweredStatementOrigins
import org.jetbrains.kotlin.backend.common.lower.TailrecLowering
import org.jetbrains.kotlin.backend.common.phaser.PhaseDescription
import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
import org.jetbrains.kotlin.backend.jvm.ir.defaultValue
import org.jetbrains.kotlin.config.LanguageFeature
import org.jetbrains.kotlin.ir.expressions.IrExpression
import org.jetbrains.kotlin.ir.expressions.IrFunctionReference
import org.jetbrains.kotlin.ir.types.IrType
@PhaseDescription(
name = "Tailrec",
description = "Handle tailrec calls"
)
internal class JvmTailrecLowering(context: JvmBackendContext) : TailrecLowering(context) {
override val useProperComputationOrderOfTailrecDefaultParameters: Boolean =
context.config.languageVersionSettings.supportsFeature(LanguageFeature.ProperComputationOrderOfTailrecDefaultParameters)
override fun followFunctionReference(reference: IrFunctionReference): Boolean =
reference.origin == LoweredStatementOrigins.INLINE_LAMBDA
override fun nullConst(startOffset: Int, endOffset: Int, type: IrType): IrExpression =
type.defaultValue(startOffset, endOffset, context as JvmBackendContext)
}