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org.jetbrains.kotlin.js.inline.InliningScope.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2018 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.js.inline
import org.jetbrains.kotlin.js.backend.ast.*
import org.jetbrains.kotlin.js.backend.ast.metadata.localAlias
import org.jetbrains.kotlin.js.backend.ast.metadata.staticRef
import org.jetbrains.kotlin.js.inline.clean.*
import org.jetbrains.kotlin.js.inline.util.*
import org.jetbrains.kotlin.js.translate.declaration.transformSpecialFunctionsToCoroutineMetadata
import org.jetbrains.kotlin.js.translate.utils.JsAstUtils
import java.util.*
// Handles interpreting an inline function in terms of the current context.
// Either an program fragment, or a public inline function
sealed class InliningScope {
abstract val fragment: JsProgramFragment
protected abstract fun addInlinedDeclaration(tag: String?, declaration: JsStatement)
protected abstract fun hasImport(name: JsName, tag: String): JsName?
protected abstract fun addImport(tag: String, vars: JsVars)
protected open fun preprocess(statement: JsStatement) {}
private val publicFunctionCache = mutableMapOf()
private val localFunctionCache = mutableMapOf()
private fun computeIfAbsent(tag: String?, function: JsFunction, fn: () -> JsFunction): JsFunction {
if (tag == null) return localFunctionCache.computeIfAbsent(function) { fn() }
return publicFunctionCache.computeIfAbsent(tag) { fn() }
}
fun importFunctionDefinition(definition: InlineFunctionDefinition): JsFunction {
// Apparently we should avoid this trick when we implement fair support for crossinline
// That's because crossinline lambdas inline into the declaration block and specialize those.
val result = computeIfAbsent(definition.tag, definition.fn.function) {
val newReplacements = HashMap()
val copiedStatements = ArrayList()
val importStatements = mutableMapOf()
definition.fn.wrapperBody?.let {
it.statements.asSequence()
.filterNot { it is JsReturn }
.map { it.deepCopy() }
.forEach { statement ->
preprocess(statement)
if (statement is JsVars) {
val tag = getImportTag(statement)
if (tag != null) {
val name = statement.vars[0].name
val existingName = hasImport(name, tag) ?: JsScope.declareTemporaryName(name.ident).also {
it.copyMetadataFrom(name)
importStatements[statement] = tag
copiedStatements.add(statement)
}
if (name !== existingName) {
val replacement = JsAstUtils.pureFqn(existingName, null)
newReplacements[name] = replacement
}
return@forEach
}
}
copiedStatements.add(statement)
}
}
copiedStatements.asSequence()
.flatMap { node -> collectDefinedNamesInAllScopes(node).asSequence() }
.filter { name -> !newReplacements.containsKey(name) }
.forEach { name ->
val alias = JsScope.declareTemporaryName(name.ident)
alias.copyMetadataFrom(name)
val replacement = JsAstUtils.pureFqn(alias, null)
newReplacements[name] = replacement
}
// Apply renaming and restore the static ref links
JsBlock(copiedStatements).let {
replaceNames(it, newReplacements)
// Restore the staticRef links
for ((key, value) in collectNamedFunctions(it)) {
if (key.staticRef is JsFunction) {
key.staticRef = value
}
}
}
copiedStatements.forEach {
if (it is JsVars && it in importStatements) {
addImport(importStatements[it]!!, it)
} else {
addInlinedDeclaration(definition.tag, it)
}
}
val result = definition.fn.function.deepCopy()
replaceNames(result, newReplacements)
result.body = transformSpecialFunctionsToCoroutineMetadata(result.body)
result
}.deepCopy()
// Copy parameter JsName's
val paramMap = result.parameters.associate {
val alias = JsScope.declareTemporaryName(it.name.ident)
alias.copyMetadataFrom(it.name)
it.name to JsAstUtils.pureFqn(alias, null)
}
replaceNames(result, paramMap)
return result
}
}
class ImportIntoFragmentInliningScope private constructor(
override val fragment: JsProgramFragment
) : InliningScope() {
val allCode: JsBlock
get() = JsBlock(
JsBlock(fragment.inlinedLocalDeclarations.values.toList()),
fragment.declarationBlock,
JsBlock(fragment.classes.values.map { it.postDeclarationBlock }),
fragment.exportBlock,
JsExpressionStatement(JsFunction(JsDynamicScope, fragment.initializerBlock, ""))
).also { block ->
fragment.tests?.let { block.statements.add(it) }
fragment.mainFunction?.let { block.statements.add(it) }
}
private val existingModules = fragment.importedModules.associateTo(mutableMapOf()) { it.key to it }
private val existingBindings = fragment.nameBindings.associateTo(mutableMapOf()) { it.key to it.name }
private val additionalDeclarations = mutableListOf()
override fun hasImport(name: JsName, tag: String): JsName? {
return name.localAlias?.let { (name, tag) ->
if (tag != null) {
if (tag !in existingBindings) {
addNameBinding(name, tag)
}
existingBindings[tag]
} else name
} ?: existingBindings[tag]
}
private fun addNameBinding(name: JsName, tag: String) {
fragment.nameBindings.add(JsNameBinding(tag, name))
existingBindings[tag] = name
}
override fun addImport(tag: String, vars: JsVars) {
val name = vars.vars[0].name
val expr = vars.vars[0].initExpression
fragment.imports[tag] = expr
addNameBinding(name, tag)
}
override fun addInlinedDeclaration(tag: String?, declaration: JsStatement) {
if (tag != null) {
fragment.inlinedLocalDeclarations.computeIfAbsent(tag) { JsGlobalBlock() }.statements.add(declaration)
} else {
additionalDeclarations.add(declaration)
}
}
override fun preprocess(statement: JsStatement) {
object : JsVisitorWithContextImpl() {
override fun endVisit(x: JsNameRef, ctx: JsContext) {
replaceIfNecessary(x, ctx)
}
override fun endVisit(x: JsArrayAccess, ctx: JsContext) {
replaceIfNecessary(x, ctx)
}
private fun replaceIfNecessary(expression: JsExpression, ctx: JsContext) {
val alias = expression.localAlias
if (alias != null) {
ctx.replaceMe(addInlinedModule(alias).makeRef())
}
}
}.accept(statement)
}
private fun addInlinedModule(module: JsImportedModule): JsName {
return existingModules.computeIfAbsent(module.key) {
// Copy so that the Merger.kt doesn't operate on the same instance in different fragments.
JsImportedModule(module.externalName, module.internalName, module.plainReference).also {
fragment.importedModules.add(it)
}
}.internalName
}
companion object {
fun process(fragment: JsProgramFragment, fn: (ImportIntoFragmentInliningScope) -> Unit) {
val scope = ImportIntoFragmentInliningScope(fragment)
fn(scope)
scope.apply {
// TODO fix the order?
fragment.declarationBlock.statements.addAll(0, additionalDeclarations)
// post-processing
// If run separately `private inline suspend fun`'s local declarations get inlined twice.
InlineSuspendFunctionSplitter(this).accept(allCode)
simplifyWrappedFunctions(allCode)
emergePrimitiveKClass(allCode)
removeUnusedFunctionDefinitions(allCode, collectNamedFunctions(allCode))
removeUnusedImports(fragment, allCode)
renameLabels(allCode)
}
}
}
}
class ImportIntoWrapperInliningScope private constructor(
private val wrapperBody: JsBlock,
override val fragment: JsProgramFragment
) : InliningScope() {
private val importList = mutableListOf()
private val otherLocalStatements = mutableListOf()
private val existingImports = mutableMapOf()
init {
for (s in wrapperBody.statements) {
if (s is JsVars) {
val tag = getImportTag(s)
if (tag != null) {
importList.add(s)
existingImports[tag] = s.vars[0].name
continue
}
}
otherLocalStatements.add(s)
}
}
private val additionalStatements = mutableListOf()
override fun addInlinedDeclaration(tag: String?, declaration: JsStatement) {
additionalStatements.add(declaration)
}
override fun hasImport(name: JsName, tag: String): JsName? = existingImports[tag]
override fun addImport(tag: String, vars: JsVars) {
existingImports[tag] = vars.vars[0].name
importList.add(vars)
}
companion object {
fun process(wrapperBody: JsBlock, fragment: JsProgramFragment, fn: (ImportIntoWrapperInliningScope) -> Unit) {
val scope = ImportIntoWrapperInliningScope(wrapperBody, fragment)
fn(scope)
wrapperBody.statements.apply {
clear()
addAll(scope.importList)
addAll(scope.additionalStatements)
addAll(scope.otherLocalStatements)
}
}
}
}
