/*
* Copyright 2010-2015 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jetbrains.kotlin.cfg.pseudocode.instructions.jumps
import org.jetbrains.kotlin.cfg.pseudocode.PseudoValue
import org.jetbrains.kotlin.psi.KtElement
import org.jetbrains.kotlin.cfg.Label
import java.util.Arrays
import org.jetbrains.kotlin.cfg.pseudocode.instructions.BlockScope
import org.jetbrains.kotlin.cfg.pseudocode.instructions.Instruction
import org.jetbrains.kotlin.cfg.pseudocode.instructions.InstructionVisitorWithResult
import org.jetbrains.kotlin.cfg.pseudocode.instructions.InstructionVisitor
class ConditionalJumpInstruction(
element: KtElement,
val onTrue: Boolean,
blockScope: BlockScope,
targetLabel: Label,
private val conditionValue: PseudoValue?
) : AbstractJumpInstruction(element, targetLabel, blockScope) {
private var _nextOnTrue: Instruction? = null
private var _nextOnFalse: Instruction? = null
var nextOnTrue: Instruction
get() = _nextOnTrue!!
set(value) {
_nextOnTrue = outgoingEdgeTo(value)
}
var nextOnFalse: Instruction
get() = _nextOnFalse!!
set(value) {
_nextOnFalse = outgoingEdgeTo(value)
}
override val nextInstructions: Collection<Instruction>
get() = Arrays.asList(nextOnFalse, nextOnTrue)
override val inputValues: List<PseudoValue>
get() = listOfNotNull(conditionValue)
override fun accept(visitor: InstructionVisitor) {
visitor.visitConditionalJump(this)
}
override fun <R> accept(visitor: InstructionVisitorWithResult<R>): R {
return visitor.visitConditionalJump(this)
}
override fun toString(): String {
val instr = if (onTrue) "jt" else "jf"
val inValue = conditionValue?.let { "|" + it } ?: ""
return "$instr(${targetLabel.name}$inValue)"
}
override fun createCopy(newLabel: Label, blockScope: BlockScope): AbstractJumpInstruction =
ConditionalJumpInstruction(element, onTrue, blockScope, newLabel, conditionValue)
}