Rename some methods in interpreter's stack to make their purpose clearer

compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/CallInterceptor.kt

@@ -19,7 +19,6 @@ import org.jetbrains.kotlin.ir.interpreter.intrinsics.IntrinsicEvaluator
 import org.jetbrains.kotlin.ir.interpreter.proxy.wrap
 import org.jetbrains.kotlin.ir.interpreter.stack.CallStack
 import org.jetbrains.kotlin.ir.interpreter.state.*
-import org.jetbrains.kotlin.ir.interpreter.state.reflection.KTypeState
 import org.jetbrains.kotlin.ir.types.IrType
 import org.jetbrains.kotlin.ir.types.classOrNull
 import org.jetbrains.kotlin.ir.types.isArray
@@ -51,7 +50,7 @@ internal class DefaultCallInterceptor(override val interpreter: IrInterpreter) :
     override fun interceptProxy(irFunction: IrFunction, valueArguments: List<State>, expectedResultClass: Class<*>): Any? {
         val irCall = irFunction.createCall()
         return interpreter.withNewCallStack(irCall) {
-            this@withNewCallStack.environment.callStack.addInstruction(SimpleInstruction(irCall))
+            this@withNewCallStack.environment.callStack.pushInstruction(SimpleInstruction(irCall))
             valueArguments.forEach { this@withNewCallStack.environment.callStack.pushState(it) }
         }.wrap(this@DefaultCallInterceptor, remainArraysAsIs = false, extendFrom = expectedResultClass)
     }
@@ -73,7 +72,7 @@ internal class DefaultCallInterceptor(override val interpreter: IrInterpreter) :
     }
 
     override fun interceptConstructor(constructorCall: IrFunctionAccessExpression, args: List<State>, defaultAction: () -> Unit) {
-        val receiver = callStack.getState(constructorCall.getThisReceiver())
+        val receiver = callStack.loadState(constructorCall.getThisReceiver())
         val irConstructor = constructorCall.symbol.owner
         val irClass = irConstructor.parentAsClass
         when {
@@ -81,7 +80,7 @@ internal class DefaultCallInterceptor(override val interpreter: IrInterpreter) :
                 Wrapper.getConstructorMethod(irConstructor).invokeMethod(irConstructor, args)
                 when {
                     irClass.isSubclassOfThrowable() -> (receiver as ExceptionState).copyFieldsFrom(callStack.popState() as Wrapper)
-                    constructorCall is IrConstructorCall -> callStack.setState(constructorCall.getThisReceiver(), callStack.popState())
+                    constructorCall is IrConstructorCall -> callStack.rewriteState(constructorCall.getThisReceiver(), callStack.popState())
                     else -> (receiver as Complex).superWrapperClass = callStack.popState() as Wrapper
                 }
             }
@@ -140,7 +139,7 @@ internal class DefaultCallInterceptor(override val interpreter: IrInterpreter) :
 
     private fun handleIntrinsicMethods(irFunction: IrFunction): Boolean {
         val instructions = IntrinsicEvaluator.unwindInstructions(irFunction, environment) ?: return false
-        instructions.forEach { callStack.addInstruction(it) }
+        instructions.forEach { callStack.pushInstruction(it) }
         return true
     }
 
@@ -185,7 +184,7 @@ internal class DefaultCallInterceptor(override val interpreter: IrInterpreter) :
             constructorCall.putValueArgument(index, primitive.value.toIrConst(constructorValueParameters[index].owner.type))
         }
 
-        callStack.addInstruction(CompoundInstruction(constructorCall))
+        callStack.pushInstruction(CompoundInstruction(constructorCall))
     }
 
     private fun Any?.getType(defaultType: IrType): IrType {
@@ -207,7 +206,7 @@ internal class DefaultCallInterceptor(override val interpreter: IrInterpreter) :
     private fun IrFunction.trySubstituteFunctionBody(): IrElement? {
         val signature = this.symbol.signature ?: return null
         this.body = bodyMap[signature] ?: return null
-        callStack.addInstruction(CompoundInstruction(this))
+        callStack.pushInstruction(CompoundInstruction(this))
         return body
     }
 
@@ -215,6 +214,6 @@ internal class DefaultCallInterceptor(override val interpreter: IrInterpreter) :
     private fun IrFunction.tryCalculateLazyConst(): IrExpression? {
         if (this !is IrSimpleFunction) return null
         val expression = this.correspondingPropertySymbol?.owner?.backingField?.initializer?.expression
-        return expression?.apply { callStack.addInstruction(CompoundInstruction(this)) }
+        return expression?.apply { callStack.pushInstruction(CompoundInstruction(this)) }
     }
 }

compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/InstructionsUnfolder.kt

@@ -25,8 +25,8 @@ internal fun IrExpression.handleAndDropResult(callStack: CallStack, dropOnlyUnit
     val dropResult = fun() {
         if (!dropOnlyUnit && !this.type.isUnit() || callStack.peekState().isUnit()) callStack.popState()
     }
-    callStack.addInstruction(CustomInstruction(dropResult))
-    callStack.addInstruction(CompoundInstruction(this))
+    callStack.pushInstruction(CustomInstruction(dropResult))
+    callStack.pushInstruction(CompoundInstruction(this))
 }
 
 internal fun unfoldInstruction(element: IrElement?, environment: IrInterpreterEnvironment) {
@@ -45,11 +45,11 @@ internal fun unfoldInstruction(element: IrElement?, environment: IrInterpreterEn
         is IrBlock -> unfoldBlock(element, callStack)
         is IrReturn -> unfoldReturn(element, callStack)
         is IrSetField -> unfoldSetField(element, callStack)
-        is IrGetField -> callStack.addInstruction(SimpleInstruction(element))
+        is IrGetField -> callStack.pushInstruction(SimpleInstruction(element))
         is IrGetValue -> unfoldGetValue(element, environment)
         is IrGetObjectValue -> unfoldGetObjectValue(element, environment)
         is IrGetEnumValue -> unfoldGetEnumValue(element, environment)
-        is IrConst<*> -> callStack.addInstruction(SimpleInstruction(element))
+        is IrConst<*> -> callStack.pushInstruction(SimpleInstruction(element))
         is IrVariable -> unfoldVariable(element, callStack)
         is IrSetValue -> unfoldSetValue(element, callStack)
         is IrTypeOperatorCall -> unfoldTypeOperatorCall(element, callStack)
@@ -60,12 +60,12 @@ internal fun unfoldInstruction(element: IrElement?, environment: IrInterpreterEn
         is IrBreak -> unfoldBreak(element, callStack)
         is IrContinue -> unfoldContinue(element, callStack)
         is IrVararg -> unfoldVararg(element, callStack)
-        is IrSpreadElement -> callStack.addInstruction(CompoundInstruction(element.expression))
+        is IrSpreadElement -> callStack.pushInstruction(CompoundInstruction(element.expression))
         is IrTry -> unfoldTry(element, callStack)
         is IrCatch -> unfoldCatch(element, callStack)
         is IrThrow -> unfoldThrow(element, callStack)
         is IrStringConcatenation -> unfoldStringConcatenation(element, environment)
-        is IrFunctionExpression -> callStack.addInstruction(SimpleInstruction(element))
+        is IrFunctionExpression -> callStack.pushInstruction(SimpleInstruction(element))
         is IrFunctionReference -> unfoldFunctionReference(element, callStack)
         is IrPropertyReference -> unfoldPropertyReference(element, callStack)
         is IrClassReference -> unfoldClassReference(element, callStack)
@@ -83,7 +83,7 @@ private fun unfoldFunction(function: IrSimpleFunction, environment: IrInterprete
     }
     // SimpleInstruction with function is added in IrCall
     // It will serve as endpoint for all possible calls, there we drop frame and copy result to new one
-    function.body?.let { environment.callStack.addInstruction(CompoundInstruction(it)) }
+    function.body?.let { environment.callStack.pushInstruction(CompoundInstruction(it)) }
         ?: throw InterpreterError("Ir function must be with body")
 }
 
@@ -92,18 +92,18 @@ private fun unfoldConstructor(constructor: IrConstructor, callStack: CallStack)
         "kotlin.Enum.<init>", "kotlin.Throwable.<init>" -> {
             val irClass = constructor.parentAsClass
             val receiverSymbol = irClass.thisReceiver!!.symbol
-            val receiverState = callStack.getState(receiverSymbol)
+            val receiverState = callStack.loadState(receiverSymbol)
 
             irClass.declarations.filterIsInstance<IrProperty>().forEach { property ->
                 val parameter = constructor.valueParameters.singleOrNull { it.name == property.name }
-                val state = parameter?.let { callStack.getState(it.symbol) } ?: Primitive.nullStateOfType(property.getter!!.returnType)
+                val state = parameter?.let { callStack.loadState(it.symbol) } ?: Primitive.nullStateOfType(property.getter!!.returnType)
                 receiverState.setField(property.symbol, state)
             }
         }
         else -> {
             // SimpleInstruction with function is added in constructor call
             // It will serve as endpoint for all possible constructor calls, there we drop frame and return object
-            callStack.addInstruction(CompoundInstruction(constructor.body!!))
+            callStack.pushInstruction(CompoundInstruction(constructor.body!!))
         }
     }
 }
@@ -114,7 +114,7 @@ private fun unfoldValueParameters(expression: IrFunctionAccessExpression, enviro
     if (hasDefaults) {
         environment.getCachedFunction(expression.symbol, fromDelegatingCall = expression is IrDelegatingConstructorCall)?.let {
             val callToDefault = it.owner.createCall().apply { environment.irBuiltIns.copyArgs(expression, this) }
-            callStack.addInstruction(CompoundInstruction(callToDefault))
+            callStack.pushInstruction(CompoundInstruction(callToDefault))
             return
         }
 
@@ -140,7 +140,7 @@ private fun unfoldValueParameters(expression: IrFunctionAccessExpression, enviro
                 actualParameters[index] = if (copiedParameter.defaultValue != null || copiedParameter.isVararg) {
                     copiedParameter.type = copiedParameter.type.makeNullable() // make nullable type to keep consistency; parameter can be null if it is missing
                     val irGetParameter = copiedParameter.createGetValue()
-                    // if parameter is vararg and it is missing then create constructor call for empty array
+                    // if parameter is vararg and it is missing, then create constructor call for empty array
                     val defaultInitializer = originalParameter.getDefaultWithActualParameters(this@apply, actualParameters)
                         ?: environment.irBuiltIns.emptyArrayConstructor(expression.getVarargType(index)!!.getTypeIfReified(callStack))
 
@@ -162,14 +162,14 @@ private fun unfoldValueParameters(expression: IrFunctionAccessExpression, enviro
         val callToDefault = environment.setCachedFunction(
             expression.symbol, fromDelegatingCall = expression is IrDelegatingConstructorCall, newFunction = defaultFun.symbol
         ).owner.createCall().apply { environment.irBuiltIns.copyArgs(expression, this) }
-        callStack.addInstruction(CompoundInstruction(callToDefault))
+        callStack.pushInstruction(CompoundInstruction(callToDefault))
     } else {
         val irFunction = expression.symbol.owner
-        callStack.addInstruction(SimpleInstruction(expression))
+        callStack.pushInstruction(SimpleInstruction(expression))
 
         fun IrValueParameter.schedule(arg: IrExpression?) {
-            callStack.addInstruction(SimpleInstruction(this))
-            callStack.addInstruction(CompoundInstruction(arg))
+            callStack.pushInstruction(SimpleInstruction(this))
+            callStack.pushInstruction(CompoundInstruction(arg))
         }
         (expression.valueArgumentsCount - 1 downTo 0).forEach { irFunction.valueParameters[it].schedule(expression.getValueArgument(it)) }
         expression.extensionReceiver?.let { irFunction.extensionReceiverParameter!!.schedule(it) }
@@ -183,25 +183,25 @@ private fun unfoldInstanceInitializerCall(instanceInitializerCall: IrInstanceIni
 
     toInitialize.reversed().forEach {
         when {
-            it is IrAnonymousInitializer -> callStack.addInstruction(CompoundInstruction(it.body))
-            it is IrProperty && it.backingField?.initializer?.expression != null -> callStack.addInstruction(CompoundInstruction(it.backingField))
+            it is IrAnonymousInitializer -> callStack.pushInstruction(CompoundInstruction(it.body))
+            it is IrProperty && it.backingField?.initializer?.expression != null -> callStack.pushInstruction(CompoundInstruction(it.backingField))
         }
     }
 }
 
 private fun unfoldField(field: IrField, callStack: CallStack) {
-    callStack.addInstruction(SimpleInstruction(field))
-    callStack.addInstruction(CompoundInstruction(field.initializer?.expression))
+    callStack.pushInstruction(SimpleInstruction(field))
+    callStack.pushInstruction(CompoundInstruction(field.initializer?.expression))
 }
 
 private fun unfoldBody(body: IrBody, callStack: CallStack) {
-    callStack.addInstruction(SimpleInstruction(body))
+    callStack.pushInstruction(SimpleInstruction(body))
     unfoldStatements(body.statements, callStack)
 }
 
 private fun unfoldBlock(block: IrBlock, callStack: CallStack) {
     callStack.newSubFrame(block)
-    callStack.addInstruction(SimpleInstruction(block))
+    callStack.pushInstruction(SimpleInstruction(block))
     unfoldStatements(block.statements, callStack)
 }
 
@@ -214,24 +214,24 @@ private fun unfoldStatements(statements: List<IrStatement>, callStack: CallStack
             is IrFunction -> if (!statement.isLocal) TODO("Only local functions are supported")
             is IrExpression ->
                 when {
-                    i.isLastIndex() -> callStack.addInstruction(CompoundInstruction(statement))
+                    i.isLastIndex() -> callStack.pushInstruction(CompoundInstruction(statement))
                     else -> statement.handleAndDropResult(callStack, dropOnlyUnit = true)
                 }
-            else -> callStack.addInstruction(CompoundInstruction(statement))
+            else -> callStack.pushInstruction(CompoundInstruction(statement))
         }
     }
 }
 
 private fun unfoldReturn(expression: IrReturn, callStack: CallStack) {
-    callStack.addInstruction(SimpleInstruction(expression))
-    callStack.addInstruction(CompoundInstruction(expression.value))
+    callStack.pushInstruction(SimpleInstruction(expression))
+    callStack.pushInstruction(CompoundInstruction(expression.value))
 }
 
 private fun unfoldSetField(expression: IrSetField, callStack: CallStack) {
     verify(!expression.accessesTopLevelOrObjectField()) { "Cannot interpret set method on top level properties" }
 
-    callStack.addInstruction(SimpleInstruction(expression))
-    callStack.addInstruction(CompoundInstruction(expression.value))
+    callStack.pushInstruction(SimpleInstruction(expression))
+    callStack.pushInstruction(CompoundInstruction(expression.value))
 }
 
 private fun unfoldGetValue(expression: IrGetValue, environment: IrInterpreterEnvironment) {
@@ -242,7 +242,7 @@ private fun unfoldGetValue(expression: IrGetValue, environment: IrInterpreterEnv
         val irGetObject = expectedClass.createGetObject()
         return unfoldGetObjectValue(irGetObject, environment)
     }
-    environment.callStack.pushState(environment.callStack.getState(expression.symbol))
+    environment.callStack.pushState(environment.callStack.loadState(expression.symbol))
 }
 
 private fun unfoldGetObjectValue(expression: IrGetObjectValue, environment: IrInterpreterEnvironment) {
@@ -250,64 +250,64 @@ private fun unfoldGetObjectValue(expression: IrGetObjectValue, environment: IrIn
     val objectClass = expression.symbol.owner
     environment.mapOfObjects[objectClass.symbol]?.let { return callStack.pushState(it) }
 
-    callStack.addInstruction(SimpleInstruction(expression))
+    callStack.pushInstruction(SimpleInstruction(expression))
 }
 
 private fun unfoldGetEnumValue(expression: IrGetEnumValue, environment: IrInterpreterEnvironment) {
     val callStack = environment.callStack
     environment.mapOfEnums[expression.symbol]?.let { return callStack.pushState(it) }
 
-    callStack.addInstruction(SimpleInstruction(expression))
+    callStack.pushInstruction(SimpleInstruction(expression))
     val enumEntry = expression.symbol.owner
     val enumClass = enumEntry.symbol.owner.parentAsClass
     enumClass.declarations.filterIsInstance<IrEnumEntry>().forEach {
-        callStack.addInstruction(SimpleInstruction(it))
+        callStack.pushInstruction(SimpleInstruction(it))
     }
 }
 
 private fun unfoldVariable(variable: IrVariable, callStack: CallStack) {
     when (variable.initializer) {
-        null -> callStack.addVariable(variable.symbol, null)
+        null -> callStack.storeState(variable.symbol, null)
         else -> {
-            callStack.addInstruction(SimpleInstruction(variable))
-            callStack.addInstruction(CompoundInstruction(variable.initializer!!))
+            callStack.pushInstruction(SimpleInstruction(variable))
+            callStack.pushInstruction(CompoundInstruction(variable.initializer!!))
         }
     }
 }
 
 private fun unfoldSetValue(expression: IrSetValue, callStack: CallStack) {
-    callStack.addInstruction(SimpleInstruction(expression))
-    callStack.addInstruction(CompoundInstruction(expression.value))
+    callStack.pushInstruction(SimpleInstruction(expression))
+    callStack.pushInstruction(CompoundInstruction(expression.value))
 }
 
 private fun unfoldTypeOperatorCall(element: IrTypeOperatorCall, callStack: CallStack) {
-    callStack.addInstruction(SimpleInstruction(element))
-    callStack.addInstruction(CompoundInstruction(element.argument))
+    callStack.pushInstruction(SimpleInstruction(element))
+    callStack.pushInstruction(CompoundInstruction(element.argument))
 }
 
 private fun unfoldBranch(branch: IrBranch, callStack: CallStack) {
-    callStack.addInstruction(SimpleInstruction(branch))
-    callStack.addInstruction(CompoundInstruction(branch.condition))
+    callStack.pushInstruction(SimpleInstruction(branch))
+    callStack.pushInstruction(CompoundInstruction(branch.condition))
 }
 
 private fun unfoldWhileLoop(loop: IrWhileLoop, callStack: CallStack) {
     callStack.newSubFrame(loop)
-    callStack.addInstruction(SimpleInstruction(loop))
-    callStack.addInstruction(CompoundInstruction(loop.condition))
+    callStack.pushInstruction(SimpleInstruction(loop))
+    callStack.pushInstruction(CompoundInstruction(loop.condition))
 }
 
 private fun unfoldDoWhileLoop(loop: IrDoWhileLoop, callStack: CallStack) {
     callStack.newSubFrame(loop)
-    callStack.addInstruction(SimpleInstruction(loop))
-    callStack.addInstruction(CompoundInstruction(loop.condition))
-    callStack.addInstruction(CompoundInstruction(loop.body))
+    callStack.pushInstruction(SimpleInstruction(loop))
+    callStack.pushInstruction(CompoundInstruction(loop.condition))
+    callStack.pushInstruction(CompoundInstruction(loop.body))
 }
 
 private fun unfoldWhen(element: IrWhen, callStack: CallStack) {
     // new sub frame to drop it after
     callStack.newSubFrame(element)
-    callStack.addInstruction(SimpleInstruction(element))
-    element.branches.reversed().forEach { callStack.addInstruction(CompoundInstruction(it)) }
+    callStack.pushInstruction(SimpleInstruction(element))
+    element.branches.reversed().forEach { callStack.pushInstruction(CompoundInstruction(it)) }
 }
 
 private fun unfoldContinue(element: IrContinue, callStack: CallStack) {
@@ -319,14 +319,14 @@ private fun unfoldBreak(element: IrBreak, callStack: CallStack) {
 }
 
 private fun unfoldVararg(element: IrVararg, callStack: CallStack) {
-    callStack.addInstruction(SimpleInstruction(element))
-    element.elements.reversed().forEach { callStack.addInstruction(CompoundInstruction(it)) }
+    callStack.pushInstruction(SimpleInstruction(element))
+    element.elements.reversed().forEach { callStack.pushInstruction(CompoundInstruction(it)) }
 }
 
 private fun unfoldTry(element: IrTry, callStack: CallStack) {
     callStack.newSubFrame(element)
-    callStack.addInstruction(SimpleInstruction(element))
-    callStack.addInstruction(CompoundInstruction(element.tryResult))
+    callStack.pushInstruction(SimpleInstruction(element))
+    callStack.pushInstruction(CompoundInstruction(element.tryResult))
 }
 
 private fun unfoldCatch(element: IrCatch, callStack: CallStack) {
@@ -336,20 +336,20 @@ private fun unfoldCatch(element: IrCatch, callStack: CallStack) {
         val frameOwner = callStack.currentFrameOwner as IrTry
         callStack.dropSubFrame() // drop other catch blocks
         callStack.newSubFrame(element) // new frame with IrTry instruction to interpret finally block at the end
-        callStack.addVariable(element.catchParameter.symbol, exceptionState)
-        callStack.addInstruction(SimpleInstruction(frameOwner))
-        callStack.addInstruction(CompoundInstruction(element.result))
+        callStack.storeState(element.catchParameter.symbol, exceptionState)
+        callStack.pushInstruction(SimpleInstruction(frameOwner))
+        callStack.pushInstruction(CompoundInstruction(element.result))
     }
 }
 
 private fun unfoldThrow(expression: IrThrow, callStack: CallStack) {
-    callStack.addInstruction(SimpleInstruction(expression))
-    callStack.addInstruction(CompoundInstruction(expression.value))
+    callStack.pushInstruction(SimpleInstruction(expression))
+    callStack.pushInstruction(CompoundInstruction(expression.value))
 }
 
 private fun unfoldStringConcatenation(expression: IrStringConcatenation, environment: IrInterpreterEnvironment) {
     val callStack = environment.callStack
-    callStack.addInstruction(SimpleInstruction(expression))
+    callStack.pushInstruction(SimpleInstruction(expression))
 
     // this callback is used to check the need for an explicit toString call
     val explicitToStringCheck = fun() {
@@ -368,52 +368,52 @@ private fun unfoldStringConcatenation(expression: IrStringConcatenation, environ
                     return callStack.pushState(environment.convertToState(result, environment.irBuiltIns.stringType))
                 }
                 val toStringCall = state.createToStringIrCall()
-                callStack.addInstruction(SimpleInstruction(toStringCall))
+                callStack.pushInstruction(SimpleInstruction(toStringCall))
                 callStack.pushState(state)
             }
         }
     }
     expression.arguments.reversed().forEach {
-        callStack.addInstruction(CustomInstruction(explicitToStringCheck))
-        callStack.addInstruction(CompoundInstruction(it))
+        callStack.pushInstruction(CustomInstruction(explicitToStringCheck))
+        callStack.pushInstruction(CompoundInstruction(it))
     }
 }
 
 private fun unfoldComposite(element: IrComposite, callStack: CallStack) {
     when (element.origin) {
         IrStatementOrigin.DESTRUCTURING_DECLARATION, IrStatementOrigin.DO_WHILE_LOOP, null -> // is null for body of do while loop
-            element.statements.reversed().forEach { callStack.addInstruction(CompoundInstruction(it)) }
+            element.statements.reversed().forEach { callStack.pushInstruction(CompoundInstruction(it)) }
         else -> TODO("${element.origin} not implemented")
     }
 }
 
 private fun unfoldFunctionReference(reference: IrFunctionReference, callStack: CallStack) {
     val function = reference.symbol.owner
-    callStack.addInstruction(SimpleInstruction(reference))
+    callStack.pushInstruction(SimpleInstruction(reference))
 
-    reference.dispatchReceiver?.let { callStack.addInstruction(SimpleInstruction(function.dispatchReceiverParameter!!)) }
-    reference.extensionReceiver?.let { callStack.addInstruction(SimpleInstruction(function.extensionReceiverParameter!!)) }
+    reference.dispatchReceiver?.let { callStack.pushInstruction(SimpleInstruction(function.dispatchReceiverParameter!!)) }
+    reference.extensionReceiver?.let { callStack.pushInstruction(SimpleInstruction(function.extensionReceiverParameter!!)) }
 
-    reference.extensionReceiver?.let { callStack.addInstruction(CompoundInstruction(it)) }
-    reference.dispatchReceiver?.let { callStack.addInstruction(CompoundInstruction(it)) }
+    reference.extensionReceiver?.let { callStack.pushInstruction(CompoundInstruction(it)) }
+    reference.dispatchReceiver?.let { callStack.pushInstruction(CompoundInstruction(it)) }
 }
 
 private fun unfoldPropertyReference(propertyReference: IrPropertyReference, callStack: CallStack) {
     val getter = propertyReference.getter!!.owner
-    callStack.addInstruction(SimpleInstruction(propertyReference))
+    callStack.pushInstruction(SimpleInstruction(propertyReference))
 
-    propertyReference.dispatchReceiver?.let { callStack.addInstruction(SimpleInstruction(getter.dispatchReceiverParameter!!)) }
-    propertyReference.extensionReceiver?.let { callStack.addInstruction(SimpleInstruction(getter.extensionReceiverParameter!!)) }
+    propertyReference.dispatchReceiver?.let { callStack.pushInstruction(SimpleInstruction(getter.dispatchReceiverParameter!!)) }
+    propertyReference.extensionReceiver?.let { callStack.pushInstruction(SimpleInstruction(getter.extensionReceiverParameter!!)) }
 
-    propertyReference.extensionReceiver?.let { callStack.addInstruction(CompoundInstruction(it)) }
-    propertyReference.dispatchReceiver?.let { callStack.addInstruction(CompoundInstruction(it)) }
+    propertyReference.extensionReceiver?.let { callStack.pushInstruction(CompoundInstruction(it)) }
+    propertyReference.dispatchReceiver?.let { callStack.pushInstruction(CompoundInstruction(it)) }
 }
 
 private fun unfoldClassReference(classReference: IrClassReference, callStack: CallStack) {
-    callStack.addInstruction(SimpleInstruction(classReference))
+    callStack.pushInstruction(SimpleInstruction(classReference))
 }
 
 private fun unfoldGetClass(element: IrGetClass, callStack: CallStack) {
-    callStack.addInstruction(SimpleInstruction(element))
-    callStack.addInstruction(CompoundInstruction(element.argument))
+    callStack.pushInstruction(SimpleInstruction(element))
+    callStack.pushInstruction(CompoundInstruction(element.argument))
 }

compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/IrInterpreter.kt

@@ -65,7 +65,7 @@ class IrInterpreter(internal val environment: IrInterpreterEnvironment, internal
     fun interpret(expression: IrExpression, file: IrFile? = null): IrExpression {
         commandCount = 0
         callStack.newFrame(expression, file)
-        callStack.addInstruction(CompoundInstruction(expression))
+        callStack.pushInstruction(CompoundInstruction(expression))
 
         while (!callStack.hasNoInstructions()) {
             callStack.popInstruction().handle()
@@ -106,8 +106,8 @@ class IrInterpreter(internal val environment: IrInterpreterEnvironment, internal
             is IrGetEnumValue -> interpretGetEnumValue(element)
             is IrEnumEntry -> interpretEnumEntry(element)
             is IrConst<*> -> interpretConst(element)
-            is IrVariable -> callStack.addVariable(element.symbol, callStack.popState())
-            is IrSetValue -> callStack.setState(element.symbol, callStack.popState())
+            is IrVariable -> callStack.storeState(element.symbol, callStack.popState())
+            is IrSetValue -> callStack.rewriteState(element.symbol, callStack.popState())
             is IrTypeOperatorCall -> interpretTypeOperatorCall(element)
             is IrBranch -> interpretBranch(element)
             is IrWhileLoop -> interpretWhile(element)
@@ -174,7 +174,7 @@ class IrInterpreter(internal val environment: IrInterpreterEnvironment, internal
         val reifiedTypeArguments = environment.loadReifiedTypeArguments(call)
 
         callStack.newFrame(irFunction)
-        callStack.addInstruction(SimpleInstruction(irFunction))
+        callStack.pushInstruction(SimpleInstruction(irFunction))
 
         // 4. load up values onto stack; do it at first to set low priority of these variables
         if (dispatchReceiver is StateWithClosure) callStack.loadUpValues(dispatchReceiver)
@@ -182,27 +182,27 @@ class IrInterpreter(internal val environment: IrInterpreterEnvironment, internal
         if (irFunction.isLocal) callStack.copyUpValuesFromPreviousFrame()
 
         // 5. store arguments in memory (remap args on actual names)
-        irFunction.getDispatchReceiver()?.let { callStack.addVariable(it, dispatchReceiver!!) }
-        irFunction.getExtensionReceiver()?.let { callStack.addVariable(it, extensionReceiver ?: callStack.getState(it)) }
-        irFunction.valueParameters.forEachIndexed { i, param -> callStack.addVariable(param.symbol, valueArguments[i]) }
+        irFunction.getDispatchReceiver()?.let { callStack.storeState(it, dispatchReceiver!!) }
+        irFunction.getExtensionReceiver()?.let { callStack.storeState(it, extensionReceiver ?: callStack.loadState(it)) }
+        irFunction.valueParameters.forEachIndexed { i, param -> callStack.storeState(param.symbol, valueArguments[i]) }
         // `call.type` is used in check cast and emptyArray
-        callStack.addVariable(irFunction.symbol, KTypeState(call.type, environment.kTypeClass.owner))
+        callStack.storeState(irFunction.symbol, KTypeState(call.type, environment.kTypeClass.owner))
 
         // 6. store reified type parameters
-        reifiedTypeArguments.forEach { callStack.addVariable(it.key, it.value) }
+        reifiedTypeArguments.forEach { callStack.storeState(it.key, it.value) }
 
         // 7. load outer class object
         if (dispatchReceiver is Complex && irFunction.parentClassOrNull?.isInner == true) dispatchReceiver.loadOuterClassesInto(callStack)
 
         callInterceptor.interceptCall(call, irFunction, args) {
-            callStack.addInstruction(CompoundInstruction(irFunction))
+            callStack.pushInstruction(CompoundInstruction(irFunction))
         }
     }
 
     private fun interpretField(field: IrField) {
         val irClass = field.parentAsClass
         val receiver = irClass.thisReceiver!!.symbol
-        val receiverState = callStack.getState(receiver)
+        val receiverState = callStack.loadState(receiver)
         receiverState.setField(field.correspondingPropertySymbol!!, callStack.popState())
     }
 
@@ -219,7 +219,7 @@ class IrInterpreter(internal val environment: IrInterpreterEnvironment, internal
 
     @Suppress("UNUSED_PARAMETER")
     private fun interpretConstructor(constructor: IrConstructor) {
-        callStack.pushState(callStack.getState(constructor.parentAsClass.thisReceiver!!.symbol))
+        callStack.pushState(callStack.loadState(constructor.parentAsClass.thisReceiver!!.symbol))
         callStack.dropFrameAndCopyResult()
     }
 
@@ -231,7 +231,7 @@ class IrInterpreter(internal val environment: IrInterpreterEnvironment, internal
 
         // this check is used to be sure that object will be created once
         val objectState = when (constructorCall) {
-            !is IrConstructorCall -> callStack.getState(constructorCall.getThisReceiver())
+            !is IrConstructorCall -> callStack.loadState(constructorCall.getThisReceiver())
             else -> (if (irClass.isSubclassOfThrowable()) ExceptionState(irClass, callStack.getStackTrace()) else Common(irClass))
                 .apply {
                     // must set object's state here, before actual initialization, to avoid cyclic evaluation
@@ -244,12 +244,12 @@ class IrInterpreter(internal val environment: IrInterpreterEnvironment, internal
         val returnType = constructorCall.type.getTypeIfReified(callStack)
 
         callStack.newFrame(constructor)
-        callStack.addInstruction(SimpleInstruction(constructor))
+        callStack.pushInstruction(SimpleInstruction(constructor))
         if (irClass.isLocal) callStack.loadUpValues(objectState as StateWithClosure)
 
-        callStack.addVariable(constructorCall.getThisReceiver(), objectState)
-        constructor.valueParameters.forEachIndexed { i, param -> callStack.addVariable(param.symbol, valueArguments[i]) }
-        callStack.addVariable(constructor.symbol, KTypeState(returnType, environment.kTypeClass.owner))
+        callStack.storeState(constructorCall.getThisReceiver(), objectState)
+        constructor.valueParameters.forEachIndexed { i, param -> callStack.storeState(param.symbol, valueArguments[i]) }
+        callStack.storeState(constructor.symbol, KTypeState(returnType, environment.kTypeClass.owner))
 
         val superReceiver = when (val irStatement = constructor.body?.statements?.get(0)) {
             null -> null // for jvm
@@ -258,7 +258,7 @@ class IrInterpreter(internal val environment: IrInterpreterEnvironment, internal
             is IrBlock -> (irStatement.statements.last() as IrFunctionAccessExpression).getThisReceiver()
             else -> TODO("${irStatement::class.java} is not supported as first statement in constructor call")
         }
-        superReceiver?.let { callStack.addVariable(it, objectState) }
+        superReceiver?.let { callStack.storeState(it, objectState) }
 
         if (outerClass != null) {
             val outerClassSymbolToState = irClass.parentAsClass.thisReceiver!!.symbol to outerClass
@@ -267,14 +267,14 @@ class IrInterpreter(internal val environment: IrInterpreterEnvironment, internal
                 // This check is needed to test that this inner class is not subclass of its outer.
                 // If it is true and if we add the next symbol, it will interfere with super symbol in memory.
                 // In other case, we need this variable when inner class has inner super class.
-                callStack.addVariable(receiverSymbol, outerClass)
+                callStack.storeState(receiverSymbol, outerClass)
                 // used to get information from outer class
                 objectState.loadOuterClassesInto(callStack, constructorCall.getThisReceiver())
             }
         }
 
         callInterceptor.interceptConstructor(constructorCall, valueArguments) {
-            callStack.addInstruction(CompoundInstruction(constructor))
+            callStack.pushInstruction(CompoundInstruction(constructor))
         }
     }
 
@@ -303,7 +303,7 @@ class IrInterpreter(internal val environment: IrInterpreterEnvironment, internal
             val constructorCall = IrConstructorCallImpl.fromSymbolOwner(constructor.returnType, constructor.symbol)
             constructorCall.putValueArgument(0, expression.value.toIrConst(signedType))
 
-            return callStack.addInstruction(CompoundInstruction(constructorCall))
+            return callStack.pushInstruction(CompoundInstruction(constructorCall))
         }
         callStack.pushState(expression.toPrimitive())
     }
@@ -317,9 +317,9 @@ class IrInterpreter(internal val environment: IrInterpreterEnvironment, internal
         callStack.dropSubFrame()
         if (result) {
             callStack.newSubFrame(loop)
-            callStack.addInstruction(SimpleInstruction(loop))
-            callStack.addInstruction(CompoundInstruction(loop.condition))
-            callStack.addInstruction(CompoundInstruction(loop.body))
+            callStack.pushInstruction(SimpleInstruction(loop))
+            callStack.pushInstruction(CompoundInstruction(loop.condition))
+            callStack.pushInstruction(CompoundInstruction(loop.body))
         }
     }
 
@@ -328,9 +328,9 @@ class IrInterpreter(internal val environment: IrInterpreterEnvironment, internal
         callStack.dropSubFrame()
         if (result) {
             callStack.newSubFrame(loop)
-            callStack.addInstruction(SimpleInstruction(loop))
-            callStack.addInstruction(CompoundInstruction(loop.condition))
-            callStack.addInstruction(CompoundInstruction(loop.body))
+            callStack.pushInstruction(SimpleInstruction(loop))
+            callStack.pushInstruction(CompoundInstruction(loop.condition))
+            callStack.pushInstruction(CompoundInstruction(loop.body))
         }
     }
 
@@ -338,14 +338,14 @@ class IrInterpreter(internal val environment: IrInterpreterEnvironment, internal
         val result = callStack.popState().asBoolean()
         if (result) {
             callStack.dropSubFrame()
-            callStack.addInstruction(CompoundInstruction(branch.result))
+            callStack.pushInstruction(CompoundInstruction(branch.result))
         }
     }
 
     private fun interpretSetField(expression: IrSetField) {
         val receiver = (expression.receiver as IrDeclarationReference).symbol
         val propertySymbol = expression.symbol.owner.correspondingPropertySymbol!!
-        callStack.getState(receiver).apply { this.setField(propertySymbol, callStack.popState()) }
+        callStack.loadState(receiver).apply { this.setField(propertySymbol, callStack.popState()) }
     }
 
     private fun interpretGetField(expression: IrGetField) {
@@ -355,12 +355,12 @@ class IrInterpreter(internal val environment: IrInterpreterEnvironment, internal
             field.origin == IrDeclarationOrigin.IR_EXTERNAL_JAVA_DECLARATION_STUB && field.isStatic -> {
                 // for java static variables
                 when (val initializerExpression = field.initializer?.expression) {
-                    is IrConst<*> -> callStack.addInstruction(SimpleInstruction(initializerExpression))
+                    is IrConst<*> -> callStack.pushInstruction(SimpleInstruction(initializerExpression))
                     else -> callInterceptor.interceptJavaStaticField(expression)
                 }
             }
             field.origin == IrDeclarationOrigin.PROPERTY_BACKING_FIELD && field.correspondingPropertySymbol?.owner?.isConst == true -> {
-                callStack.addInstruction(CompoundInstruction(field.initializer?.expression))
+                callStack.pushInstruction(CompoundInstruction(field.initializer?.expression))
             }
             expression.accessesTopLevelOrObjectField() -> {
                 val propertyOwner = field.correspondingPropertySymbol?.owner
@@ -368,10 +368,10 @@ class IrInterpreter(internal val environment: IrInterpreterEnvironment, internal
                         propertyOwner?.backingField?.initializer?.expression is IrConst<*> ||
                         propertyOwner?.parentClassOrNull?.hasAnnotation(compileTimeAnnotation) == true // check if object is marked as compile time
                 verify(isConst) { "Cannot interpret get method on top level non const properties" }
-                callStack.addInstruction(CompoundInstruction(field.initializer?.expression))
+                callStack.pushInstruction(CompoundInstruction(field.initializer?.expression))
             }
             else -> {
-                val result = callStack.getState(receiver!!).getField(field.correspondingPropertySymbol!!)
+                val result = callStack.loadState(receiver!!).getField(field.correspondingPropertySymbol!!)
                 callStack.pushState(result!!)
             }
         }
@@ -391,7 +391,7 @@ class IrInterpreter(internal val environment: IrInterpreterEnvironment, internal
 
             val constructor = objectClass.constructors.first()
             val constructorCall = IrConstructorCallImpl.fromSymbolOwner(constructor.returnType, constructor.symbol)
-            callStack.addInstruction(CompoundInstruction(constructorCall))
+            callStack.pushInstruction(CompoundInstruction(constructorCall))
         }
     }
 
@@ -427,9 +427,9 @@ class IrInterpreter(internal val environment: IrInterpreterEnvironment, internal
             environment.mapOfEnums[enumEntry.symbol] = enumClassObject
 
             callStack.newSubFrame(enumEntry)
-            callStack.addInstruction(CustomInstruction(cleanEnumSuperCall))
-            callStack.addInstruction(CompoundInstruction(enumInitializer))
-            callStack.addVariable(enumConstructorCall.getThisReceiver(), enumClassObject)
+            callStack.pushInstruction(CustomInstruction(cleanEnumSuperCall))
+            callStack.pushInstruction(CompoundInstruction(enumInitializer))
+            callStack.storeState(enumConstructorCall.getThisReceiver(), enumClassObject)
         }
     }
 
@@ -563,7 +563,7 @@ class IrInterpreter(internal val environment: IrInterpreterEnvironment, internal
                 callStack.pushState(possibleException)
                 callStack.dropFramesUntilTryCatch()
             }
-            callStack.addInstruction(CustomInstruction(checkUnhandledException))
+            callStack.pushInstruction(CustomInstruction(checkUnhandledException))
         }
         element.finallyExpression?.handleAndDropResult(callStack)
     }
@@ -628,7 +628,7 @@ class IrInterpreter(internal val environment: IrInterpreterEnvironment, internal
     private fun interpretClassReference(classReference: IrClassReference) {
         when (classReference.symbol) {
             is IrTypeParameterSymbol -> { // reified
-                val kTypeState = callStack.getState(classReference.symbol) as KTypeState
+                val kTypeState = callStack.loadState(classReference.symbol) as KTypeState
                 callStack.pushState(KClassState(kTypeState.irType.classOrNull!!.owner, classReference.type.classOrNull!!.owner))
             }
             else -> callStack.pushState(KClassState(classReference))

compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/Utils.kt

@@ -161,7 +161,7 @@ internal fun IrFunction?.checkCast(environment: IrInterpreterEnvironment): Boole
     if (actualType.classifierOrNull !is IrTypeParameterSymbol) return true
 
     // TODO expectedType can be missing for functions called as proxy
-    val expectedType = (environment.callStack.getState(this.symbol) as? KTypeState)?.irType ?: return true
+    val expectedType = (environment.callStack.loadState(this.symbol) as? KTypeState)?.irType ?: return true
     if (expectedType.classifierOrFail is IrTypeParameterSymbol) return true
 
     val actualState = environment.callStack.peekState() ?: return true
@@ -242,7 +242,7 @@ internal fun IrValueParameter.getDefaultWithActualParameters(
 }
 
 internal fun IrType.getTypeIfReified(callStack: CallStack): IrType {
-    return this.getTypeIfReified { (callStack.getState(it) as KTypeState).irType }
+    return this.getTypeIfReified { (callStack.loadState(it) as KTypeState).irType }
 }
 
 internal fun IrType.getTypeIfReified(getType: (IrClassifierSymbol) -> IrType): IrType {

compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/intrinsics/IntrinsicImplementations.kt

@@ -43,7 +43,7 @@ internal object EmptyArray : IntrinsicBase() {
     }
 
     override fun evaluate(irFunction: IrFunction, environment: IrInterpreterEnvironment) {
-        val returnType = environment.callStack.getState(irFunction.symbol) as KTypeState
+        val returnType = environment.callStack.loadState(irFunction.symbol) as KTypeState
         environment.callStack.pushState(environment.convertToState(emptyArray<Any?>(), returnType.irType))
     }
 }
@@ -58,7 +58,7 @@ internal object ArrayOf : IntrinsicBase() {
 
     override fun evaluate(irFunction: IrFunction, environment: IrInterpreterEnvironment) {
         val elementsSymbol = irFunction.valueParameters.single().symbol
-        val varargVariable = environment.callStack.getState(elementsSymbol)
+        val varargVariable = environment.callStack.loadState(elementsSymbol)
         environment.callStack.pushState(varargVariable)
     }
 }
@@ -69,9 +69,9 @@ internal object ArrayOfNulls : IntrinsicBase() {
     }
 
     override fun evaluate(irFunction: IrFunction, environment: IrInterpreterEnvironment) {
-        val size = environment.callStack.getState(irFunction.valueParameters.first().symbol).asInt()
+        val size = environment.callStack.loadState(irFunction.valueParameters.first().symbol).asInt()
         val array = arrayOfNulls<Any?>(size)
-        val typeArgument = irFunction.typeParameters.map { environment.callStack.getState(it.symbol) }.single() as KTypeState
+        val typeArgument = irFunction.typeParameters.map { environment.callStack.loadState(it.symbol) }.single() as KTypeState
         val returnType = (irFunction.returnType as IrSimpleType).buildSimpleType {
             arguments = listOf(makeTypeProjection(typeArgument.irType, Variance.INVARIANT))
         }
@@ -88,7 +88,7 @@ internal object EnumValues : IntrinsicBase() {
     private fun getEnumClass(irFunction: IrFunction, environment: IrInterpreterEnvironment): IrClass {
         return when (irFunction.fqName) {
             "kotlin.enumValues" -> {
-                val kType = environment.callStack.getState(irFunction.typeParameters.first().symbol) as KTypeState
+                val kType = environment.callStack.loadState(irFunction.typeParameters.first().symbol) as KTypeState
                 kType.irType.classOrNull!!.owner
             }
             else -> irFunction.parent as IrClass
@@ -118,7 +118,7 @@ internal object EnumValueOf : IntrinsicBase() {
     private fun getEnumClass(irFunction: IrFunction, environment: IrInterpreterEnvironment): IrClass {
         return when (irFunction.fqName) {
             "kotlin.enumValueOf" -> {
-                val kType = environment.callStack.getState(irFunction.typeParameters.first().symbol) as KTypeState
+                val kType = environment.callStack.loadState(irFunction.typeParameters.first().symbol) as KTypeState
                 kType.irType.classOrNull!!.owner
             }
             else -> irFunction.parent as IrClass
@@ -127,7 +127,7 @@ internal object EnumValueOf : IntrinsicBase() {
 
     private fun getEnumEntryByName(irFunction: IrFunction, environment: IrInterpreterEnvironment): IrEnumEntry? {
         val enumClass = getEnumClass(irFunction, environment)
-        val enumEntryName = environment.callStack.getState(irFunction.valueParameters.first().symbol).asString()
+        val enumEntryName = environment.callStack.loadState(irFunction.valueParameters.first().symbol).asString()
         val enumEntry = enumClass.declarations.filterIsInstance<IrEnumEntry>().singleOrNull { it.name.asString() == enumEntryName }
         if (enumEntry == null) {
             IllegalArgumentException("No enum constant ${enumClass.fqName}.$enumEntryName").handleUserException(environment)
@@ -168,7 +168,7 @@ internal object EnumIntrinsics : IntrinsicBase() {
 
     override fun evaluate(irFunction: IrFunction, environment: IrInterpreterEnvironment) {
         val callStack = environment.callStack
-        val enumEntry = callStack.getState(irFunction.dispatchReceiverParameter!!.symbol)
+        val enumEntry = callStack.loadState(irFunction.dispatchReceiverParameter!!.symbol)
         when (irFunction.name.asString()) {
             "<get-name>", "<get-ordinal>" -> {
                 val symbol = (irFunction as IrSimpleFunction).correspondingPropertySymbol!!
@@ -176,13 +176,13 @@ internal object EnumIntrinsics : IntrinsicBase() {
             }
             "compareTo" -> {
                 val ordinalSymbol = enumEntry.irClass.getOriginalPropertyByName("ordinal").symbol
-                val other = callStack.getState(irFunction.valueParameters.single().symbol)
+                val other = callStack.loadState(irFunction.valueParameters.single().symbol)
                 val compareTo = enumEntry.getField(ordinalSymbol)!!.asInt().compareTo(other.getField(ordinalSymbol)!!.asInt())
                 callStack.pushState(environment.convertToState(compareTo, irFunction.returnType))
             }
             // TODO "clone" -> throw exception
             "equals" -> {
-                val other = callStack.getState(irFunction.valueParameters.single().symbol)
+                val other = callStack.loadState(irFunction.valueParameters.single().symbol)
                 callStack.pushState(environment.convertToState((enumEntry === other), irFunction.returnType))
             }
             "hashCode" -> callStack.pushState(environment.convertToState(enumEntry.hashCode(), irFunction.returnType))
@@ -204,12 +204,12 @@ internal object JsPrimitives : IntrinsicBase() {
     override fun evaluate(irFunction: IrFunction, environment: IrInterpreterEnvironment) {
         when (irFunction.fqName) {
             "kotlin.Long.<init>" -> {
-                val low = environment.callStack.getState(irFunction.valueParameters[0].symbol).asInt()
-                val high = environment.callStack.getState(irFunction.valueParameters[1].symbol).asInt()
+                val low = environment.callStack.loadState(irFunction.valueParameters[0].symbol).asInt()
+                val high = environment.callStack.loadState(irFunction.valueParameters[1].symbol).asInt()
                 environment.callStack.pushState(environment.convertToState((high.toLong().shl(32) + low), irFunction.returnType))
             }
             "kotlin.Char.<init>" -> {
-                val value = environment.callStack.getState(irFunction.valueParameters[0].symbol).asInt()
+                val value = environment.callStack.loadState(irFunction.valueParameters[0].symbol).asInt()
                 environment.callStack.pushState(environment.convertToState(value.toChar(), irFunction.returnType))
             }
         }
@@ -231,14 +231,14 @@ internal object ArrayConstructor : IntrinsicBase() {
         val instructions = mutableListOf<Instruction>(customEvaluateInstruction(irFunction, environment))
 
         val sizeSymbol = irFunction.valueParameters[0].symbol
-        val size = callStack.getState(sizeSymbol).asInt()
+        val size = callStack.loadState(sizeSymbol).asInt()
 
         val initSymbol = irFunction.valueParameters[1].symbol
-        val state = callStack.getState(initSymbol).let {
+        val state = callStack.loadState(initSymbol).let {
             (it as? KFunctionState) ?: (it as KPropertyState).convertGetterToKFunctionState(environment)
         }
         // if property was converted, then we must replace symbol in memory to get correct receiver later
-        callStack.setState(initSymbol, state)
+        callStack.rewriteState(initSymbol, state)
 
         for (i in size - 1 downTo 0) {
             val call = (state.invokeSymbol.owner as IrSimpleFunction).createCall()
@@ -252,7 +252,7 @@ internal object ArrayConstructor : IntrinsicBase() {
 
     override fun evaluate(irFunction: IrFunction, environment: IrInterpreterEnvironment) {
         val sizeDescriptor = irFunction.valueParameters[0].symbol
-        val size = environment.callStack.getState(sizeDescriptor).asInt()
+        val size = environment.callStack.loadState(sizeDescriptor).asInt()
         val arrayValue = MutableList<Any?>(size) {
             when {
                 irFunction.returnType.isCharArray() -> 0.toChar()
@@ -274,7 +274,7 @@ internal object ArrayConstructor : IntrinsicBase() {
             }
         }
 
-        val type = (environment.callStack.getState(irFunction.symbol) as KTypeState).irType
+        val type = (environment.callStack.loadState(irFunction.symbol) as KTypeState).irType
         environment.callStack.pushState(arrayValue.toPrimitiveStateArray(type))
     }
 }
@@ -298,7 +298,7 @@ internal object AssertIntrinsic : IntrinsicBase() {
         if (irFunction.valueParameters.size == 1) return listOf(customEvaluateInstruction(irFunction, environment))
 
         val lambdaParameter = irFunction.valueParameters.last()
-        val lambdaState = environment.callStack.getState(lambdaParameter.symbol) as KFunctionState
+        val lambdaState = environment.callStack.loadState(lambdaParameter.symbol) as KFunctionState
         val call = (lambdaState.invokeSymbol.owner as IrSimpleFunction).createCall()
         call.dispatchReceiver = lambdaParameter.createGetValue()
 
@@ -306,7 +306,7 @@ internal object AssertIntrinsic : IntrinsicBase() {
     }
 
     override fun evaluate(irFunction: IrFunction, environment: IrInterpreterEnvironment) {
-        val value = environment.callStack.getState(irFunction.valueParameters.first().symbol).asBoolean()
+        val value = environment.callStack.loadState(irFunction.valueParameters.first().symbol).asBoolean()
         if (value) return
         when (irFunction.valueParameters.size) {
             1 -> AssertionError("Assertion failed").handleUserException(environment)
@@ -337,7 +337,7 @@ internal object DataClassArrayToString : IntrinsicBase() {
     }
 
     override fun evaluate(irFunction: IrFunction, environment: IrInterpreterEnvironment) {
-        val array = environment.callStack.getState(irFunction.valueParameters.single().symbol) as Primitive<*>
+        val array = environment.callStack.loadState(irFunction.valueParameters.single().symbol) as Primitive<*>
         environment.callStack.pushState(environment.convertToState(arrayToString(array.value), irFunction.returnType))
     }
 }

compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/proxy/CommonProxy.kt

@@ -25,7 +25,7 @@ internal class CommonProxy private constructor(override val state: Common, overr
     private fun IrFunction.wasAlreadyCalled(): Boolean {
         val anyParameter = this.getLastOverridden().dispatchReceiverParameter!!.symbol
         val callStack = callInterceptor.environment.callStack
-        if (callStack.containsVariable(anyParameter) && callStack.getState(anyParameter) === state) return true
+        if (callStack.containsStateInMemory(anyParameter) && callStack.loadState(anyParameter) === state) return true
         return this == callInterceptor.environment.callStack.currentFrameOwner
     }
 

compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/stack/CallStack.kt

@@ -60,7 +60,7 @@ internal class CallStack {
                 is IrTry -> {
                     dropSubFrame()
                     pushState(result)
-                    addInstruction(SimpleInstruction(irReturn))
+                    pushInstruction(SimpleInstruction(irReturn))
                     frameOwner.finallyExpression?.handleAndDropResult(this)
                     return
                 }
@@ -68,7 +68,7 @@ internal class CallStack {
                     val tryBlock = currentFrame.dropInstructions()!!.element as IrTry// last instruction in `catch` block is `try`
                     dropSubFrame()
                     pushState(result)
-                    addInstruction(SimpleInstruction(irReturn))
+                    pushInstruction(SimpleInstruction(irReturn))
                     tryBlock.finallyExpression?.handleAndDropResult(this)
                     return
                 }
@@ -81,7 +81,7 @@ internal class CallStack {
         }
 
         currentFrame.dropInstructions()
-        addInstruction(SimpleInstruction(returnTarget))
+        pushInstruction(SimpleInstruction(returnTarget))
         if (returnTarget !is IrConstructor) pushState(result)
     }
 
@@ -91,17 +91,17 @@ internal class CallStack {
             when (frameOwner) {
                 is IrTry -> {
                     currentFrame.removeSubFrameWithoutDataPropagation()
-                    addInstruction(CompoundInstruction(breakOrContinue))
+                    pushInstruction(CompoundInstruction(breakOrContinue))
                     newSubFrame(frameOwner) // will be deleted when interpret 'try'
-                    addInstruction(SimpleInstruction(frameOwner))
+                    pushInstruction(SimpleInstruction(frameOwner))
                     return
                 }
                 is IrCatch -> {
                     val tryInstruction = currentFrame.dropInstructions()!! // last instruction in `catch` block is `try`
                     currentFrame.removeSubFrameWithoutDataPropagation()
-                    addInstruction(CompoundInstruction(breakOrContinue))
+                    pushInstruction(CompoundInstruction(breakOrContinue))
                     newSubFrame(tryInstruction.element!!)  // will be deleted when interpret 'try'
-                    addInstruction(tryInstruction)
+                    pushInstruction(tryInstruction)
                     return
                 }
                 else -> {
@@ -114,10 +114,10 @@ internal class CallStack {
         when (breakOrContinue) {
             is IrBreak -> currentFrame.removeSubFrameWithoutDataPropagation() // drop loop
             else -> if (breakOrContinue.loop is IrDoWhileLoop) {
-                addInstruction(SimpleInstruction(breakOrContinue.loop))
-                addInstruction(CompoundInstruction(breakOrContinue.loop.condition))
+                pushInstruction(SimpleInstruction(breakOrContinue.loop))
+                pushInstruction(CompoundInstruction(breakOrContinue.loop.condition))
             } else {
-                addInstruction(CompoundInstruction(breakOrContinue.loop))
+                pushInstruction(CompoundInstruction(breakOrContinue.loop))
             }
         }
     }
@@ -133,14 +133,14 @@ internal class CallStack {
                     is IrTry -> {
                         dropSubFrame()  // drop all instructions that left
                         newSubFrame(frameOwner)
-                        addInstruction(SimpleInstruction(frameOwner)) // to evaluate finally at the end
-                        frameOwner.catches.reversed().forEach { addInstruction(CompoundInstruction(it)) }
+                        pushInstruction(SimpleInstruction(frameOwner)) // to evaluate finally at the end
+                        frameOwner.catches.reversed().forEach { pushInstruction(CompoundInstruction(it)) }
                         pushState(exception)
                         return
                     }
                     is IrCatch -> {
                         // in case of exception in catch, drop everything except of last `try` instruction
-                        addInstruction(frame.dropInstructions()!!)
+                        pushInstruction(frame.dropInstructions()!!)
                         pushState(exception)
                         return
                     }
@@ -155,54 +155,25 @@ internal class CallStack {
     }
 
     fun hasNoInstructions() = frames.isEmpty() || (frames.size == 1 && frames.first().hasNoInstructions())
+    fun pushInstruction(instruction: Instruction) = currentFrame.pushInstruction(instruction)
+    fun popInstruction(): Instruction = currentFrame.popInstruction()
 
-    fun addInstruction(instruction: Instruction) {
-        currentFrame.addInstruction(instruction)
-    }
-
-    fun popInstruction(): Instruction {
-        return currentFrame.popInstruction()
-    }
-
-    fun pushState(state: State) {
-        currentFrame.pushState(state)
-    }
-
+    fun pushState(state: State) = currentFrame.pushState(state)
     fun popState(): State = currentFrame.popState()
     fun peekState(): State? = currentFrame.peekState()
 
-    fun addVariable(symbol: IrSymbol, state: State?) {
-        currentFrame.addVariable(symbol, state)
-    }
+    fun storeState(symbol: IrSymbol, state: State?) = currentFrame.storeState(symbol, state)
+    private fun storeState(symbol: IrSymbol, variable: Variable) = currentFrame.storeState(symbol, variable)
+    fun containsStateInMemory(symbol: IrSymbol): Boolean = currentFrame.containsStateInMemory(symbol)
+    fun loadState(symbol: IrSymbol): State = currentFrame.loadState(symbol)
+    fun rewriteState(symbol: IrSymbol, newState: State) = currentFrame.rewriteState(symbol, newState)
 
-    private fun addVariable(symbol: IrSymbol, variable: Variable) {
-        currentFrame.addVariable(symbol, variable)
-    }
-
-    fun getState(symbol: IrSymbol): State = currentFrame.getState(symbol)
-    fun setState(symbol: IrSymbol, newState: State) = currentFrame.setState(symbol, newState)
-    fun containsVariable(symbol: IrSymbol): Boolean = currentFrame.containsVariable(symbol)
-
-    fun storeUpValues(state: StateWithClosure) {
-        // TODO save only necessary declarations
-        currentFrame.copyMemoryInto(state)
-    }
-
-    fun loadUpValues(state: StateWithClosure) {
-        state.upValues.forEach { (symbol, variable) -> addVariable(symbol, variable) }
-    }
-
-    fun copyUpValuesFromPreviousFrame() {
-        frames[frames.size - 2].copyMemoryInto(currentFrame)
-    }
-
-    fun getStackTrace(): List<String> {
-        return frames.map { it.toString() }.filter { it != Frame.NOT_DEFINED }
-    }
-
-    fun getFileAndPositionInfo(): String {
-        return frames[frames.size - 2].getFileAndPositionInfo()
-    }
+    // TODO save only necessary declarations
+    fun storeUpValues(state: StateWithClosure) = currentFrame.copyMemoryInto(state)
+    fun loadUpValues(state: StateWithClosure) = state.upValues.forEach { (symbol, variable) -> storeState(symbol, variable) }
+    fun copyUpValuesFromPreviousFrame() = frames[frames.size - 2].copyMemoryInto(currentFrame)
 
+    fun getStackTrace(): List<String> = frames.map { it.toString() }.filter { it != Frame.NOT_DEFINED }
+    fun getFileAndPositionInfo(): String = frames[frames.size - 2].getFileAndPositionInfo()
     fun getStackCount(): Int = frames.size
 }

compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/stack/Frame.kt

@@ -43,31 +43,16 @@ internal class Frame(subFrameOwner: IrElement, val irFile: IrFile? = null) {
 
     fun hasNoSubFrames() = innerStack.isEmpty()
     fun hasNoInstructions() = hasNoSubFrames() || (innerStack.size == 1 && innerStack.first().isEmpty())
-
-    fun addInstruction(instruction: Instruction) {
-        currentFrame.pushInstruction(instruction)
-    }
-
-    fun popInstruction(): Instruction {
-        return currentFrame.popInstruction().apply { currentInstruction = this }
-    }
-
+    fun pushInstruction(instruction: Instruction) = currentFrame.pushInstruction(instruction)
+    fun popInstruction(): Instruction = currentFrame.popInstruction().apply { currentInstruction = this }
     fun dropInstructions() = currentFrame.dropInstructions()
 
-    fun pushState(state: State) {
-        currentFrame.pushState(state)
-    }
-
+    fun pushState(state: State) = currentFrame.pushState(state)
     fun popState(): State = currentFrame.popState()
     fun peekState(): State? = currentFrame.peekState()
 
-    fun addVariable(symbol: IrSymbol, state: State?) {
-        currentFrame.addVariable(symbol, state)
-    }
-
-    fun addVariable(symbol: IrSymbol, variable: Variable) {
-        currentFrame.addVariable(symbol, variable)
-    }
+    fun storeState(symbol: IrSymbol, state: State?) = currentFrame.storeState(symbol, state)
+    fun storeState(symbol: IrSymbol, variable: Variable) = currentFrame.storeState(symbol, variable)
 
     private inline fun forEachSubFrame(block: (SubFrame) -> Unit) {
         // TODO speed up reverse iteration or do it forward
@@ -76,28 +61,22 @@ internal class Frame(subFrameOwner: IrElement, val irFile: IrFile? = null) {
         }
     }
 
-    fun getState(symbol: IrSymbol): State {
-        forEachSubFrame {
-            it.getState(symbol)?.let { state -> return state }
-        }
+    fun loadState(symbol: IrSymbol): State {
+        forEachSubFrame { it.loadState(symbol)?.let { state -> return state } }
         throw InterpreterError("$symbol not found") // TODO better message
     }
 
-    fun setState(symbol: IrSymbol, newState: State) {
-        forEachSubFrame {
-            if (it.containsVariable(symbol)) return it.setState(symbol, newState)
-        }
+    fun rewriteState(symbol: IrSymbol, newState: State) {
+        forEachSubFrame { if (it.containsStateInMemory(symbol)) return it.rewriteState(symbol, newState) }
     }
 
-    fun containsVariable(symbol: IrSymbol): Boolean {
-        forEachSubFrame {
-            if (it.containsVariable(symbol)) return true
-        }
+    fun containsStateInMemory(symbol: IrSymbol): Boolean {
+        forEachSubFrame { if (it.containsStateInMemory(symbol)) return true }
         return false
     }
 
     fun copyMemoryInto(newFrame: Frame) {
-        this.getAll().forEach { (symbol, variable) -> if (!newFrame.containsVariable(symbol)) newFrame.addVariable(symbol, variable) }
+        this.getAll().forEach { (symbol, variable) -> if (!newFrame.containsStateInMemory(symbol)) newFrame.storeState(symbol, variable) }
     }
 
     fun copyMemoryInto(closure: StateWithClosure) {
@@ -149,17 +128,17 @@ private class SubFrame(val owner: IrElement) {
     fun peekState(): State? = dataStack.peek()
 
     // Methods to work with memory
-    fun addVariable(symbol: IrSymbol, variable: Variable) {
+    fun storeState(symbol: IrSymbol, variable: Variable) {
         memory[symbol] = variable
     }
 
-    fun addVariable(symbol: IrSymbol, state: State?) {
+    fun storeState(symbol: IrSymbol, state: State?) {
         memory[symbol] = Variable(state)
     }
 
-    fun containsVariable(symbol: IrSymbol): Boolean = memory[symbol] != null
-    fun getState(symbol: IrSymbol): State? = memory[symbol]?.state
-    fun setState(symbol: IrSymbol, newState: State) {
+    fun containsStateInMemory(symbol: IrSymbol): Boolean = memory[symbol] != null
+    fun loadState(symbol: IrSymbol): State? = memory[symbol]?.state
+    fun rewriteState(symbol: IrSymbol, newState: State) {
         memory[symbol]?.state = newState
     }
 

compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/state/Complex.kt

@@ -60,7 +60,7 @@ internal interface Complex : State {
             .toList()
             .takeFromEndWhile { receiver == null || it.first != receiver } // only state's below receiver must be loaded on stack
             .forEach { (symbol, state) ->
-                callStack.addVariable(symbol, state)
+                callStack.storeState(symbol, state)
                 (state as? StateWithClosure)?.let { callStack.loadUpValues(it) }
             }
     }