mirror of
https://github.com/irmen/prog8.git
synced 2024-11-18 19:12:44 +00:00
replace subroutine calls (statement) by GoSub
This commit is contained in:
Irmen de Jong
parent
17d403d812
commit
110e047681
@ -545,6 +545,7 @@ class AsmGen(private val program: Program,
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fun asmVariableName(identifier: IdentifierReference) =
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fixNameSymbols(identifier.nameInSource.joinToString("."))
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// TODO use INamedStatement.scopedName
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private fun getScopedSymbolNameForTarget(actualName: String, target: Statement): MutableList<String> {
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val scopedName = mutableListOf(actualName)
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var node: Node = target
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@ -857,8 +858,8 @@ class AsmGen(private val program: Program,
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internal fun translateBuiltinFunctionCallExpression(functionCall: FunctionCall, signature: FSignature, resultToStack: Boolean, resultRegister: RegisterOrPair?) =
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builtinFunctionsAsmGen.translateFunctioncallExpression(functionCall, signature, resultToStack, resultRegister)
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internal fun translateFunctionCall(functionCall: FunctionCall) =
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functioncallAsmGen.translateFunctionCall(functionCall)
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internal fun translateFunctionCall(functionCall: FunctionCall, isExpression: Boolean) =
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functioncallAsmGen.translateFunctionCall(functionCall, isExpression)
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internal fun saveXbeforeCall(functionCall: IFunctionCall) =
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functioncallAsmGen.saveXbeforeCall(functionCall)
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@ -53,7 +53,7 @@ internal class ExpressionsAsmGen(private val program: Program, private val asmge
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} else {
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sub as Subroutine
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asmgen.saveXbeforeCall(call)
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asmgen.translateFunctionCall(call)
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asmgen.translateFunctionCall(call, true)
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if(sub.regXasResult()) {
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// store the return value in X somewhere that we can acces again below
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asmgen.out(" stx P8ZP_SCRATCH_REG")
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@ -5,10 +5,7 @@ import prog8.ast.Node
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import prog8.ast.Program
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import prog8.ast.base.*
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import prog8.ast.expressions.*
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import prog8.ast.statements.InlineAssembly
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import prog8.ast.statements.RegisterOrStatusflag
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import prog8.ast.statements.Subroutine
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import prog8.ast.statements.SubroutineParameter
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import prog8.ast.statements.*
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import prog8.compiler.target.AssemblyError
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import prog8.compiler.target.cpu6502.codegen.assignment.AsmAssignSource
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import prog8.compiler.target.cpu6502.codegen.assignment.AsmAssignTarget
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@ -21,7 +18,7 @@ internal class FunctionCallAsmGen(private val program: Program, private val asmg
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internal fun translateFunctionCallStatement(stmt: IFunctionCall) {
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saveXbeforeCall(stmt)
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translateFunctionCall(stmt)
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translateFunctionCall(stmt, false)
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restoreXafterCall(stmt)
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// just ignore any result values from the function call.
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}
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@ -48,26 +45,30 @@ internal class FunctionCallAsmGen(private val program: Program, private val asmg
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}
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}
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internal fun translateFunctionCall(stmt: IFunctionCall) {
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internal fun translateFunctionCall(call: IFunctionCall, isExpression: Boolean) {
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// Output only the code to set up the parameters and perform the actual call
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// NOTE: does NOT output the code to deal with the result values!
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// NOTE: does NOT output code to save/restore the X register for this call! Every caller should deal with this in their own way!!
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// (you can use subroutine.shouldSaveX() and saveX()/restoreX() routines as a help for this)
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val sub = stmt.target.targetSubroutine(program) ?: throw AssemblyError("undefined subroutine ${stmt.target}")
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val subName = asmgen.asmSymbolName(stmt.target)
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if(stmt.args.isNotEmpty()) {
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val sub = call.target.targetSubroutine(program) ?: throw AssemblyError("undefined subroutine ${call.target}")
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if(!isExpression && !sub.isAsmSubroutine) {
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throw AssemblyError("functioncall statments to non-asmsub should have been replaced by GoSub $call")
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}
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if(call.args.isNotEmpty()) {
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if(sub.asmParameterRegisters.isEmpty()) {
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// via variables
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for(arg in sub.parameters.withIndex().zip(stmt.args)) {
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for(arg in sub.parameters.withIndex().zip(call.args)) {
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argumentViaVariable(sub, arg.first, arg.second)
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}
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} else {
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require(sub.isAsmSubroutine)
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if(sub.parameters.size==1) {
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// just a single parameter, no risk of clobbering registers
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argumentViaRegister(sub, IndexedValue(0, sub.parameters.single()), stmt.args[0])
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argumentViaRegister(sub, IndexedValue(0, sub.parameters.single()), call.args[0])
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} else {
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fun isNoClobberRisk(expr: Expression): Boolean {
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@ -89,10 +90,10 @@ internal class FunctionCallAsmGen(private val program: Program, private val asmg
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}
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when {
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stmt.args.all {isNoClobberRisk(it)} -> {
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call.args.all {isNoClobberRisk(it)} -> {
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// There's no risk of clobbering for these simple argument types. Optimize the register loading directly from these values.
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// register assignment order: 1) cx16 virtual word registers, 2) actual CPU registers, 3) CPU Carry status flag.
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val argsInfo = sub.parameters.withIndex().zip(stmt.args).zip(sub.asmParameterRegisters)
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val argsInfo = sub.parameters.withIndex().zip(call.args).zip(sub.asmParameterRegisters)
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val (cx16virtualRegs, args2) = argsInfo.partition { it.second.registerOrPair in Cx16VirtualRegisters }
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val (cpuRegs, statusRegs) = args2.partition { it.second.registerOrPair!=null }
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for(arg in cx16virtualRegs)
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@ -104,13 +105,14 @@ internal class FunctionCallAsmGen(private val program: Program, private val asmg
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}
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else -> {
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// Risk of clobbering due to complex expression args. Evaluate first, then assign registers.
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registerArgsViaStackEvaluation(stmt, sub)
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registerArgsViaStackEvaluation(call, sub)
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}
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}
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}
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}
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}
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val subName = asmgen.asmSymbolName(call.target)
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if(!sub.inline || !asmgen.options.optimize) {
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asmgen.out(" jsr $subName")
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} else {
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@ -267,7 +269,7 @@ internal class FunctionCallAsmGen(private val program: Program, private val asmg
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if(!isArgumentTypeCompatible(valueDt, parameter.value.type))
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throw AssemblyError("argument type incompatible")
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val varName = asmgen.asmVariableName(sub.scopedname+"."+parameter.value.name)
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val varName = asmgen.asmVariableName(sub.scopedName + parameter.value.name)
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asmgen.assignExpressionToVariable(value, varName, parameter.value.type, sub)
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}
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@ -159,7 +159,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
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when (val sub = value.target.targetStatement(program)) {
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is Subroutine -> {
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asmgen.saveXbeforeCall(value)
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asmgen.translateFunctionCall(value)
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asmgen.translateFunctionCall(value, true)
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val returnValue = sub.returntypes.zip(sub.asmReturnvaluesRegisters).singleOrNull { it.second.registerOrPair!=null } ?:
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sub.returntypes.zip(sub.asmReturnvaluesRegisters).single { it.second.statusflag!=null }
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when (returnValue.first) {
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@ -57,6 +57,7 @@ class StatementOptimizer(private val program: Program,
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}
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override fun after(functionCallStatement: FunctionCallStatement, parent: Node): Iterable<IAstModification> {
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// TODO use functionCallStatement.target.targetStatement() is BuiltinFunctionStatementPlaceholder ?
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if(functionCallStatement.target.nameInSource.size==1 && functionCallStatement.target.nameInSource[0] in functions.names) {
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val functionName = functionCallStatement.target.nameInSource[0]
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if (functionName in functions.purefunctionNames) {
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@ -69,35 +69,10 @@ internal class BeforeAsmGenerationAstChanger(val program: Program, private val o
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}
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private val subroutineVariables = mutableListOf<Pair<String, VarDecl>>()
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private val addedIfConditionVars = mutableSetOf<Pair<Subroutine, String>>()
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override fun before(subroutine: Subroutine, parent: Node): Iterable<IAstModification> {
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subroutineVariables.clear()
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addedIfConditionVars.clear()
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if(!subroutine.isAsmSubroutine) {
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// change 'str' parameters into 'uword' (just treat it as an address)
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val stringParams = subroutine.parameters.filter { it.type==DataType.STR }
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val parameterChanges = stringParams.map {
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val uwordParam = SubroutineParameter(it.name, DataType.UWORD, it.position)
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IAstModification.ReplaceNode(it, uwordParam, subroutine)
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}
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val stringParamsByNames = stringParams.associateBy { it.name }
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val varsChanges =
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if(stringParamsByNames.isNotEmpty()) {
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subroutine.statements
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.filterIsInstance<VarDecl>()
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.filter { it.subroutineParameter!=null && it.name in stringParamsByNames }
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.map {
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val newvar = VarDecl(it.type, DataType.UWORD, it.zeropage, null, it.name, null, false, true, it.sharedWithAsm, stringParamsByNames.getValue(it.name), it.position)
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IAstModification.ReplaceNode(it, newvar, subroutine)
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}
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}
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else emptyList()
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return parameterChanges + varsChanges
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}
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return noModifications
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}
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@ -418,11 +418,10 @@ internal class AstChecker(private val program: Program,
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val stmt = (assignment.value as FunctionCall).target.targetStatement(program)
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if (stmt is Subroutine) {
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val idt = assignment.target.inferType(program)
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if(!idt.isKnown) {
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errors.err("return type mismatch", assignment.value.position)
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}
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if(!idt.isKnown)
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throw FatalAstException("assignment target invalid dt")
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if(stmt.returntypes.isEmpty() || (stmt.returntypes.size == 1 && stmt.returntypes.single() isNotAssignableTo idt.getOr(DataType.BYTE))) {
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errors.err("return type mismatch", assignment.value.position)
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errors.err("return type mismatch: ${stmt.returntypes.single()} expected $idt", assignment.value.position)
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}
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}
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}
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@ -977,21 +976,9 @@ internal class AstChecker(private val program: Program,
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override fun visit(functionCallStatement: FunctionCallStatement) {
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val targetStatement = checkFunctionOrLabelExists(functionCallStatement.target, functionCallStatement)
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if(targetStatement!=null)
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if(targetStatement!=null) {
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checkFunctionCall(targetStatement, functionCallStatement.args, functionCallStatement.position)
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if (!functionCallStatement.void) {
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// check for unused return values
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if (targetStatement is Subroutine && targetStatement.returntypes.isNotEmpty()) {
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if(targetStatement.returntypes.size==1)
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errors.warn("result value of subroutine call is discarded (use void?)", functionCallStatement.position)
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else
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errors.warn("result values of subroutine call are discarded (use void?)", functionCallStatement.position)
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}
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else if(targetStatement is BuiltinFunctionStatementPlaceholder) {
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val rt = builtinFunctionReturnType(targetStatement.name, functionCallStatement.args, program)
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if(rt.isKnown)
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errors.warn("result value of a function call is discarded (use void?)", functionCallStatement.position)
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}
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checkUnusedReturnValues(functionCallStatement, targetStatement, program, errors)
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}
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if(functionCallStatement.target.nameInSource.last() == "sort") {
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@ -1402,3 +1389,19 @@ internal class AstChecker(private val program: Program,
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return false
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}
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}
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internal fun checkUnusedReturnValues(call: FunctionCallStatement, target: Statement, program: Program, errors: IErrorReporter) {
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if (!call.void) {
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// check for unused return values
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if (target is Subroutine && target.returntypes.isNotEmpty()) {
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if (target.returntypes.size == 1)
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errors.warn("result value of subroutine call is discarded (use void?)", call.position)
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else
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errors.warn("result values of subroutine call are discarded (use void?)", call.position)
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} else if (target is BuiltinFunctionStatementPlaceholder) {
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val rt = builtinFunctionReturnType(target.name, call.args, program)
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if (rt.isKnown)
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errors.warn("result value of a function call is discarded (use void?)", call.position)
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}
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}
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}
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@ -21,6 +21,7 @@ internal class StatementReorderer(val program: Program, val errors: IErrorReport
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// - in-place assignments are reordered a bit so that they are mostly of the form A = A <operator> <rest>
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// - sorts the choices in when statement.
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// - insert AddressOf (&) expression where required (string params to a UWORD function param etc.).
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// - replace subroutine calls (statement) by just assigning the arguments to the parameters and then a GoSub to the routine.
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private val directivesToMove = setOf("%output", "%launcher", "%zeropage", "%zpreserved", "%address", "%option")
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@ -122,6 +123,30 @@ internal class StatementReorderer(val program: Program, val errors: IErrorReport
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subs.map { IAstModification.InsertLast(it, subroutine) }
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}
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if(!subroutine.isAsmSubroutine) {
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// change 'str' parameters into 'uword' (just treat it as an address)
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val stringParams = subroutine.parameters.filter { it.type==DataType.STR }
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val parameterChanges = stringParams.map {
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val uwordParam = SubroutineParameter(it.name, DataType.UWORD, it.position)
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IAstModification.ReplaceNode(it, uwordParam, subroutine)
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}
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val stringParamsByNames = stringParams.associateBy { it.name }
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val varsChanges =
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if(stringParamsByNames.isNotEmpty()) {
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subroutine.statements
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.filterIsInstance<VarDecl>()
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.filter { it.subroutineParameter!=null && it.name in stringParamsByNames }
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.map {
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val newvar = VarDecl(it.type, DataType.UWORD, it.zeropage, null, it.name, null, false, true, it.sharedWithAsm, stringParamsByNames.getValue(it.name), it.position)
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IAstModification.ReplaceNode(it, newvar, subroutine)
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}
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}
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else emptyList()
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return parameterChanges + varsChanges
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}
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return noModifications
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}
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@ -333,4 +358,34 @@ internal class StatementReorderer(val program: Program, val errors: IErrorReport
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)
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return listOf(IAstModification.ReplaceNode(assign, memcopy, assign.parent))
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}
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override fun after(functionCallStatement: FunctionCallStatement, parent: Node): Iterable<IAstModification> {
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val function = functionCallStatement.target.targetStatement(program)!!
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checkUnusedReturnValues(functionCallStatement, function, program, errors)
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if(function is Subroutine) {
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if(function.isAsmSubroutine)
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return noModifications // TODO new logic for passing arguments to asmsub
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// regular subroutine call: replace the call with assigning the params directly + actual call with a GoSub
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require(function.asmParameterRegisters.isEmpty())
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val assignParams =
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function.parameters.zip(functionCallStatement.args).map {
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var argumentValue = it.second
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val paramIdentifier = IdentifierReference(function.scopedName + it.first.name, argumentValue.position)
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val argDt = argumentValue.inferType(program).getOrElse { throw FatalAstException("invalid dt") }
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if(argDt in ArrayDatatypes) {
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// pass the address of the array instead
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argumentValue = AddressOf(argumentValue as IdentifierReference, argumentValue.position)
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}
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Assignment(AssignTarget(paramIdentifier, null, null, argumentValue.position), argumentValue, argumentValue.position)
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}
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return assignParams.map { IAstModification.InsertBefore(functionCallStatement, it, parent as IStatementContainer) } +
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IAstModification.ReplaceNode(
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functionCallStatement as Node,
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GoSub(null, functionCallStatement.target, null, (functionCallStatement as Node).position),
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parent)
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}
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return noModifications
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}
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}
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@ -50,17 +50,18 @@ class TestSubroutines: FunSpec({
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asmfunc.parameters.single().type shouldBe DataType.STR
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asmfunc.statements.isEmpty() shouldBe true
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func.isAsmSubroutine shouldBe false
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func.parameters.single().type shouldBe DataType.STR
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func.statements.size shouldBe 4
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val paramvar = func.statements[0] as VarDecl
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paramvar.name shouldBe "thing"
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paramvar.datatype shouldBe DataType.STR
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withClue("str param for normal subroutine should be changed into UWORD") {
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func.parameters.single().type shouldBe DataType.UWORD
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func.statements.size shouldBe 4
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val paramvar = func.statements[0] as VarDecl
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paramvar.name shouldBe "thing"
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paramvar.datatype shouldBe DataType.UWORD
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}
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val assign = func.statements[2] as Assignment
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assign.target.identifier!!.nameInSource shouldBe listOf("t2")
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withClue("str param in function body should not be transformed by normal compiler steps") {
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assign.value shouldBe instanceOf<TypecastExpression>()
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withClue("str param in function body should have been transformed into just uword assignment") {
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assign.value shouldBe instanceOf<IdentifierReference>()
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}
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(assign.value as TypecastExpression).type shouldBe DataType.UWORD
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val call = func.statements[3] as FunctionCallStatement
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call.target.nameInSource.single() shouldBe "asmfunc"
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withClue("str param in function body should not be transformed by normal compiler steps") {
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@ -29,7 +29,7 @@ enum class DataType {
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UWORD -> targetType.oneOf(UWORD, FLOAT)
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WORD -> targetType.oneOf(WORD, FLOAT)
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FLOAT -> targetType == FLOAT
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STR -> targetType == STR
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STR -> targetType.oneOf(STR, UWORD)
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in ArrayDatatypes -> targetType == this
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else -> false
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}
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@ -302,7 +302,7 @@ class ArrayIndexedExpression(var arrayvar: IdentifierReference,
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val target = arrayvar.targetStatement(program)
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if (target is VarDecl) {
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return when (target.datatype) {
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DataType.STR -> InferredTypes.knownFor(DataType.UBYTE)
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DataType.STR, DataType.UWORD -> InferredTypes.knownFor(DataType.UBYTE)
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in ArrayDatatypes -> InferredTypes.knownFor(ArrayToElementTypes.getValue(target.datatype))
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else -> InferredTypes.unknown()
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}
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@ -9,6 +9,19 @@ import prog8.ast.walk.IAstVisitor
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interface INamedStatement {
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val name: String
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val scopedName: List<String>
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get() {
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val scopedName = mutableListOf(name)
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var node: Node = this as Node
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while (node !is Block) {
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node = node.parent
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if(node is INameScope) {
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scopedName.add(0, node.name)
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}
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}
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return scopedName
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}
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}
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sealed class Statement : Node {
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@ -16,6 +29,7 @@ sealed class Statement : Node {
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abstract fun accept(visitor: IAstVisitor)
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abstract fun accept(visitor: AstWalker, parent: Node)
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@Deprecated("get rid of this in favor of INamedStatement.scopedName") // TODO
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fun makeScopedName(name: String): String {
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// easy way out is to always return the full scoped name.
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// it would be nicer to find only the minimal prefixed scoped name, but that's too much hassle for now.
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@ -34,6 +48,7 @@ sealed class Statement : Node {
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return scope.joinToString(".")
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}
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fun nextSibling(): Statement? {
|
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val statements = (parent as? IStatementContainer)?.statements ?: return null
|
||||
val nextIdx = statements.indexOfFirst { it===this } + 1
|
||||
@ -664,7 +679,6 @@ class Subroutine(override val name: String,
|
||||
|
||||
override lateinit var parent: Node
|
||||
val asmGenInfo = AsmGenInfo()
|
||||
val scopedname: String by lazy { makeScopedName(name) }
|
||||
|
||||
override fun copy() = throw NotImplementedError("no support for duplicating a Subroutine")
|
||||
|
||||
@ -751,6 +765,7 @@ open class SubroutineParameter(val name: String,
|
||||
}
|
||||
|
||||
override fun copy() = SubroutineParameter(name, type, position)
|
||||
override fun toString() = "Param($type:$name)"
|
||||
}
|
||||
|
||||
class IfStatement(var condition: Expression,
|
||||
|
||||
@ -3,12 +3,16 @@ TODO
|
||||
|
||||
For next compiler release (7.4)
|
||||
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
Use GoSub to call subroutines (not in expressions?):
|
||||
Use GoSub to call subroutines (statements):
|
||||
- [DONE] allow separate assigns to subroutine's parameter variables / registers
|
||||
- for asmsubs: implement asmgen for assigning to asm parameter (register)
|
||||
- for asmsubs: implement asmgen for reading asm parameter (register)
|
||||
- replace subroutine param load code with just the right order of those assigns
|
||||
- finally replace the actual call with a GoSub
|
||||
- turn a regular subroutine call into assignments to the parameters + GoSub (take code from gosub branch)
|
||||
|
||||
Function call expression:
|
||||
- move args to assignments to params
|
||||
- add tempvar immediately in front of expression with the fuction call
|
||||
- replace the function call in the expression with the tempvar
|
||||
|
||||
|
||||
...
|
||||
|
||||
|
||||
|
||||
@ -1,26 +1,46 @@
|
||||
%import textio
|
||||
%import conv
|
||||
|
||||
main {
|
||||
|
||||
sub start() {
|
||||
ubyte @shared xx
|
||||
main.routine.r1arg = 20
|
||||
; main.routine2.r2arg = 20 ; TODO asmgen
|
||||
|
||||
xx = main.routine.r1arg
|
||||
xx++
|
||||
;xx = main.routine2.r2arg ; TODO asmgen
|
||||
;xx++
|
||||
uword xx
|
||||
xx = random_name()
|
||||
; concat_string(random_name())
|
||||
|
||||
; ubyte xx=20
|
||||
; ubyte yy=10
|
||||
;
|
||||
; routine(33)
|
||||
; txt.setcc(xx+1, yy+3, 81, 7)
|
||||
; txt.setcc(xx+2, yy+2, 81, 7)
|
||||
; txt.setcc(xx+3, yy+1, 81, 7)
|
||||
;
|
||||
; ; TODO test new param load with subroutine call in expression:
|
||||
; ; yy=routine(33)
|
||||
;
|
||||
; main.routine.r1arg = 20
|
||||
; ; main.routine2.r2arg = 20 ; TODO asmgen
|
||||
;
|
||||
; xx = main.routine.r1arg
|
||||
; xx++
|
||||
; ;xx = main.routine2.r2arg ; TODO asmgen
|
||||
; ;xx++
|
||||
|
||||
printstuff("hello")
|
||||
repeat {
|
||||
}
|
||||
}
|
||||
|
||||
sub printstuff(str addr) {
|
||||
|
||||
sub random_name() -> str {
|
||||
ubyte ii
|
||||
str name = " " ; 8 chars max
|
||||
return name
|
||||
}
|
||||
sub routine(ubyte r1arg) {
|
||||
|
||||
sub routine(ubyte r1arg) -> ubyte {
|
||||
r1arg++
|
||||
return r1arg
|
||||
}
|
||||
|
||||
asmsub routine2(ubyte r2arg @ A) {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user