/*
* Copyright 2010-2017 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.codegen.range.forLoop
import org.jetbrains.kotlin.codegen.ExpressionCodegen
import org.jetbrains.kotlin.codegen.StackValue
import org.jetbrains.kotlin.psi.KtForExpression
import org.jetbrains.org.objectweb.asm.Label
import org.jetbrains.org.objectweb.asm.Type
abstract class AbstractForInProgressionOrRangeLoopGenerator(codegen: ExpressionCodegen, forExpression: KtForExpression) :
AbstractForLoopGenerator(codegen, forExpression) {
protected var endVar: Int = -1
private var loopParameter: StackValue? = null
init {
assert(
asmElementType.sort == Type.INT ||
asmElementType.sort == Type.BYTE ||
asmElementType.sort == Type.SHORT ||
asmElementType.sort == Type.CHAR ||
asmElementType.sort == Type.LONG
) {
"Unexpected range element type: " + asmElementType
}
}
override fun beforeLoop() {
super.beforeLoop()
endVar = createLoopTempVariable(asmElementType)
}
protected fun checkPostCondition(loopExit: Label) {
assert(endVar != -1) {
"endVar must be allocated, endVar = " + endVar
}
loopParameter().put(asmElementType, elementType, v)
v.load(endVar, asmElementType)
if (asmElementType.sort == Type.LONG) {
v.lcmp()
v.ifeq(loopExit)
} else {
v.ificmpeq(loopExit)
}
}
override fun checkPreCondition(loopExit: Label) {}
protected fun loopParameter(): StackValue =
loopParameter ?: StackValue.local(loopParameterVar, loopParameterType).also { loopParameter = it }
}