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org.jetbrains.kotlin.codegen.inline.InlineCodegenForDefaultBody.kt Maven / Gradle / Ivy
/*
* Copyright 2000-2018 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.codegen.inline
import org.jetbrains.kotlin.codegen.*
import org.jetbrains.kotlin.codegen.linkWithLabel
import org.jetbrains.kotlin.codegen.state.GenerationState
import org.jetbrains.kotlin.descriptors.FunctionDescriptor
import org.jetbrains.kotlin.descriptors.ValueParameterDescriptor
import org.jetbrains.kotlin.psi.KtExpression
import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall
import org.jetbrains.kotlin.resolve.inline.InlineUtil
import org.jetbrains.kotlin.resolve.jvm.jvmSignature.JvmMethodSignature
import org.jetbrains.org.objectweb.asm.Label
import org.jetbrains.org.objectweb.asm.Type
import org.jetbrains.org.objectweb.asm.tree.LabelNode
import org.jetbrains.org.objectweb.asm.tree.MethodNode
class InlineCodegenForDefaultBody(
private val function: FunctionDescriptor,
codegen: ExpressionCodegen,
val state: GenerationState,
private val methodOwner: Type,
private val jvmSignature: JvmMethodSignature,
private val sourceCompilerForInline: SourceCompilerForInline
) : CallGenerator {
private val sourceMapper: SourceMapper = codegen.parentCodegen.orCreateSourceMapper
private val methodStartLabel = linkedLabel()
init {
assert(InlineUtil.isInline(function)) {
"InlineCodegenForDefaultBody can inline only inline functions: $function"
}
//InlineCodegenForDefaultBody created just after visitCode call
codegen.v.visitLabel(methodStartLabel)
}
override fun genCallInner(callableMethod: Callable, resolvedCall: ResolvedCall<*>?, callDefault: Boolean, codegen: ExpressionCodegen) {
val nodeAndSmap = InlineCodegen.createInlineMethodNode(
function, methodOwner, jvmSignature, callDefault, null, codegen.typeSystem, state, sourceCompilerForInline
)
val childSourceMapper = SourceMapCopier(sourceMapper, nodeAndSmap.classSMAP)
val node = nodeAndSmap.node
val transformedMethod = MethodNode(
node.access,
node.name,
node.desc,
node.signature,
node.exceptions.toTypedArray()
)
val argsSize =
(Type.getArgumentsAndReturnSizes(jvmSignature.asmMethod.descriptor) ushr 2) - if (callableMethod.isStaticCall()) 1 else 0
node.accept(object : InlineAdapter(transformedMethod, 0, childSourceMapper) {
override fun visitLocalVariable(name: String, desc: String, signature: String?, start: Label, end: Label, index: Int) {
val startLabel = if (index < argsSize) methodStartLabel else start
super.visitLocalVariable(name, desc, signature, startLabel, end, index)
}
})
transformedMethod.accept(MethodBodyVisitor(codegen.visitor))
}
override fun genValueAndPut(
valueParameterDescriptor: ValueParameterDescriptor?,
argumentExpression: KtExpression,
parameterType: JvmKotlinType,
parameterIndex: Int
) {
throw UnsupportedOperationException("Shouldn't be called")
}
override fun putValueIfNeeded(parameterType: JvmKotlinType, value: StackValue, kind: ValueKind, parameterIndex: Int) {
//original method would be inlined directly into default impl body without any inline magic
//so we no need to load variables on stack to further method call
}
override fun putCapturedValueOnStack(stackValue: StackValue, valueType: Type, paramIndex: Int) {
throw UnsupportedOperationException("Shouldn't be called")
}
override fun processAndPutHiddenParameters(justProcess: Boolean) {
throw UnsupportedOperationException("Shouldn't be called")
}
override fun putHiddenParamsIntoLocals() {
throw UnsupportedOperationException("Shouldn't be called")
}
override fun reorderArgumentsIfNeeded(actualArgsWithDeclIndex: List, valueParameterTypes: List) {
throw UnsupportedOperationException("Shouldn't be called")
}
}