mirror of
https://github.com/irmen/prog8.git
synced 2024-11-25 19:31:36 +00:00
more rewrite variable allocation
This commit is contained in:
Irmen de Jong
parent
9acc2f92d1
commit
7d67005709
@ -218,8 +218,6 @@ internal class ProgramGen(
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}
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asmgen.out("")
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asmgen.outputSourceLine(sub)
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if(sub.isAsmSubroutine) {
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if(sub.asmAddress!=null)
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@ -7,6 +7,7 @@ import prog8.ast.base.DataType
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import prog8.ast.base.VarDeclType
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import prog8.ast.expressions.StringLiteralValue
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import prog8.ast.statements.VarDecl
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import prog8.ast.statements.VarDeclOrigin
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import prog8.ast.statements.ZeropageWish
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import prog8.compilerinterface.*
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@ -19,10 +20,12 @@ internal class VariableAllocation(val vars: IVariablesAndConsts, val errors: IEr
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return
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val zeropage = options.compTarget.machine.zeropage
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// val allVariables = vars.blockVars.asSequence().flatMap { it.value }.map {it.origVar to it.origVar.scopedName} +
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// vars.subroutineVars.asSequence().flatMap { it.value }.map {it.origVar to it.origVar.scopedName}
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val allVariables = callGraph.allIdentifiers.asSequence()
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.map { it.value }
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.filterIsInstance<VarDecl>()
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.filter { it.type== VarDeclType.VAR }
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.filter { it.type== VarDeclType.VAR && it.origin!=VarDeclOrigin.SUBROUTINEPARAM }
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.toSet()
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.map { it to it.scopedName }
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val varsRequiringZp = allVariables.filter { it.first.zeropage== ZeropageWish.REQUIRE_ZEROPAGE }
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@ -30,6 +33,33 @@ internal class VariableAllocation(val vars: IVariablesAndConsts, val errors: IEr
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.filter { it.first.zeropage== ZeropageWish.PREFER_ZEROPAGE }
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.sortedBy { options.compTarget.memorySize(it.first.datatype) } // allocate the smallest DT first
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val allVarsFromCallgraph = allVariables.map { it.first.name to it.first.position }.toSet()
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val altAllVars = (vars.blockVars.flatMap { it.value }.map {it.name to it.position} + vars.subroutineVars.flatMap { it.value }.map {it.name to it.position}).toSet()
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val extraVarsInCallgraph = allVarsFromCallgraph - altAllVars
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val extraVarsInNew = altAllVars - allVarsFromCallgraph
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if(extraVarsInCallgraph.any() || extraVarsInNew.any()) {
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println("EXTRA VARS IN CALLGRAPH: ${extraVarsInCallgraph.size}")
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extraVarsInCallgraph.forEach {
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println(" $it")
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}
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println("EXTRA VARS IN VARIABLESOBJ: ${extraVarsInNew.size}")
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extraVarsInNew.forEach {
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println(" $it")
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}
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// TODO("fix differences")
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}
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val altTotalNumVars = vars.blockVars.flatMap { it.value }.size + vars.subroutineVars.flatMap { it.value }.size
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val altVarsRequiringZpBlocks = vars.blockVars.flatMap { it.value }.filter { it.zp==ZeropageWish.REQUIRE_ZEROPAGE }
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val altVarsRequiringZpSubs = vars.subroutineVars.flatMap { it.value }.filter { it.zp==ZeropageWish.REQUIRE_ZEROPAGE }
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val altTotalZpVars = altVarsRequiringZpBlocks.size + altVarsRequiringZpSubs.size
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val altVarsPreferringZpBlocks = vars.blockVars.flatMap { it.value }.filter { it.zp==ZeropageWish.PREFER_ZEROPAGE }
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val altVarsPreferringZpSubs = vars.subroutineVars.flatMap { it.value }.filter { it.zp==ZeropageWish.PREFER_ZEROPAGE }
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val altTotalPrefZpVars = altVarsPreferringZpBlocks.size + altVarsPreferringZpSubs.size
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for ((vardecl, scopedname) in varsRequiringZp) {
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val numElements: Int? = when(vardecl.datatype) {
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DataType.STR -> {
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@ -89,7 +89,11 @@ class StatementOptimizer(private val program: Program,
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mutableListOf(NumericLiteralValue(DataType.UBYTE, firstCharEncoded.toDouble(), pos)),
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functionCallStatement.void, pos
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)
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return listOf(IAstModification.ReplaceNode(functionCallStatement, chrout, parent))
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val stringDecl = string.parent as VarDecl
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return listOf(
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IAstModification.ReplaceNode(functionCallStatement, chrout, parent),
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IAstModification.Remove(stringDecl, stringDecl.parent as IStatementContainer)
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)
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} else if (string.value.length == 2) {
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val firstTwoCharsEncoded = compTarget.encodeString(string.value.take(2), string.encoding)
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val chrout1 = FunctionCallStatement(
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@ -102,9 +106,11 @@ class StatementOptimizer(private val program: Program,
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mutableListOf(NumericLiteralValue(DataType.UBYTE, firstTwoCharsEncoded[1].toDouble(), pos)),
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functionCallStatement.void, pos
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)
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val stringDecl = string.parent as VarDecl
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return listOf(
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IAstModification.InsertBefore(functionCallStatement, chrout1, parent as IStatementContainer),
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IAstModification.ReplaceNode(functionCallStatement, chrout2, parent)
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IAstModification.ReplaceNode(functionCallStatement, chrout2, parent),
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IAstModification.Remove(stringDecl, stringDecl.parent as IStatementContainer)
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)
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}
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}
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@ -69,6 +69,7 @@ class UnusedCodeRemover(private val program: Program,
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if(callgraph.unused(block)) {
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if(block.statements.any{ it !is VarDecl || it.type==VarDeclType.VAR})
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errors.warn("removing unused block '${block.name}'", block.position)
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program.removeInternedStringsFromRemovedBlock(block)
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return listOf(IAstModification.Remove(block, parent as IStatementContainer))
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}
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}
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@ -92,6 +93,7 @@ class UnusedCodeRemover(private val program: Program,
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}
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if(!subroutine.definingModule.isLibrary)
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errors.warn("removing unused subroutine '${subroutine.name}'", subroutine.position)
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program.removeInternedStringsFromRemovedSubroutine(subroutine)
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return listOf(IAstModification.Remove(subroutine, parent as IStatementContainer))
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}
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}
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@ -101,11 +103,13 @@ class UnusedCodeRemover(private val program: Program,
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override fun after(decl: VarDecl, parent: Node): Iterable<IAstModification> {
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if(decl.type==VarDeclType.VAR) {
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val forceOutput = "force_output" in decl.definingBlock.options()
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if (!forceOutput && decl.origin==VarDeclOrigin.USERCODE && !decl.sharedWithAsm && !decl.definingBlock.isInLibrary) {
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val block = decl.definingBlock
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val forceOutput = "force_output" in block.options()
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if (!forceOutput && decl.origin==VarDeclOrigin.USERCODE && !decl.sharedWithAsm && !block.isInLibrary) { // TODO remove check on block.isInLibrary, but this now breaks some programs
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val usages = callgraph.usages(decl)
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if (usages.isEmpty()) {
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errors.warn("removing unused variable '${decl.name}'", decl.position)
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if(!decl.definingModule.isLibrary)
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errors.warn("removing unused variable '${decl.name}'", decl.position)
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return listOf(IAstModification.Remove(decl, parent as IStatementContainer))
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}
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else {
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@ -113,8 +117,9 @@ class UnusedCodeRemover(private val program: Program,
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val singleUse = usages[0].parent
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if(singleUse is AssignTarget) {
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val assignment = singleUse.parent as Assignment
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if(assignment.value !is IFunctionCall) {
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errors.warn("removing unused variable '${decl.name}'", decl.position)
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if(assignment.origin==AssignmentOrigin.VARINIT) {
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if(!decl.definingModule.isLibrary)
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errors.warn("removing unused variable '${decl.name}'", decl.position)
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return listOf(
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IAstModification.Remove(decl, parent as IStatementContainer),
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IAstModification.Remove(assignment, assignment.parent as IStatementContainer)
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@ -7,13 +7,13 @@ prog8_lib {
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%asminclude "library:prog8_funcs.asm"
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; to store intermediary expression results for return values:
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; NOTE: these variables are used in the StatementReorderer and StatementOptimizer
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uword @zp retval_interm_uw
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word @zp retval_interm_w
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ubyte @zp retval_interm_ub
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byte @zp retval_interm_b
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word retval_interm_w2
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byte retval_interm_b2
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; NOTE: these variables can be used in the StatementReorderer and StatementOptimizer
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uword @zp @shared retval_interm_uw
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word @zp @shared retval_interm_w
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ubyte @zp @shared retval_interm_ub
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byte @zp @shared retval_interm_b
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word @shared retval_interm_w2
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byte @shared retval_interm_b2
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; prog8 "hooks" to be able to access the temporary scratch variables
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; YOU SHOULD NOT USE THESE IN USER CODE - THESE ARE MEANT FOR INTERNAL COMPILER USE
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@ -71,19 +71,21 @@ internal class BeforeAsmAstChanger(val program: Program, private val options: Co
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val scope=decl.definingScope
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when (decl.type) {
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VarDeclType.VAR -> {
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when(scope) {
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is Block -> {
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val decls = allBlockVars[scope] ?: mutableSetOf()
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decls.add(decl)
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allBlockVars[scope] = decls
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}
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is Subroutine -> {
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val decls = allSubroutineVars[scope] ?: mutableSetOf()
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decls.add(decl)
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allSubroutineVars[scope] = decls
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}
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else -> {
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throw FatalAstException("var can only occur in subroutine or block scope")
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if(decl.origin!=VarDeclOrigin.SUBROUTINEPARAM) {
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when (scope) {
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is Block -> {
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val decls = allBlockVars[scope] ?: mutableSetOf()
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decls.add(decl)
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allBlockVars[scope] = decls
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}
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is Subroutine -> {
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val decls = allSubroutineVars[scope] ?: mutableSetOf()
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decls.add(decl)
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allSubroutineVars[scope] = decls
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}
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else -> {
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throw FatalAstException("var can only occur in subroutine or block scope")
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}
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}
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}
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}
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@ -469,7 +471,7 @@ internal class VariablesAndConsts (
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astBlockVars.forEach { (block, decls) ->
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val vars = bv.getValue(block)
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vars.addAll(decls.map {
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IVariablesAndConsts.StaticBlockVariable(it.datatype, it.name, it.value, it.position, it)
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IVariablesAndConsts.StaticBlockVariable(it.datatype, it.name, it.value, it.zeropage, it.position, it)
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})
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}
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astBlockConsts.forEach { (block, decls) ->
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@ -497,7 +499,7 @@ internal class VariablesAndConsts (
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astSubroutineVars.forEach { (sub, decls) ->
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val vars = sv.getValue(sub)
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vars.addAll(decls.map {
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IVariablesAndConsts.StaticSubroutineVariable(it.datatype, it.name, it.position, it)
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IVariablesAndConsts.StaticSubroutineVariable(it.datatype, it.name, it.zeropage, it.position, it)
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})
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}
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astSubroutineConsts.forEach { (sub, decls) ->
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@ -36,7 +36,7 @@ main {
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}
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withClue("module order in parse tree") {
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moduleNames.drop(1) shouldBe listOf(
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"prog8_interned_strings",
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internedStringsModuleName,
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"textio",
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"syslib",
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"conv",
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@ -79,13 +79,13 @@ class TestAsmGenSymbols: StringSpec({
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override val subroutineMemvars: Map<Subroutine, Set<IVariablesAndConsts.MemoryMappedVariable>>
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init {
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blockVars = mutableMapOf()
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blockVars[block] = mutableSetOf(IVariablesAndConsts.StaticBlockVariable(varInBlock.datatype, varInBlock.name, varInBlock.value, varInBlock.position, varInBlock))
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blockVars[block] = mutableSetOf(IVariablesAndConsts.StaticBlockVariable(varInBlock.datatype, varInBlock.name, varInBlock.value, varInBlock.zeropage, varInBlock.position, varInBlock))
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blockConsts = mutableMapOf()
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blockMemvars = mutableMapOf()
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subroutineVars = mutableMapOf()
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subroutineVars[subroutine] = mutableSetOf(
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IVariablesAndConsts.StaticSubroutineVariable(varInSub.datatype, varInSub.name, varInSub.position, varInSub),
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IVariablesAndConsts.StaticSubroutineVariable(var2InSub.datatype, var2InSub.name, var2InSub.position, var2InSub)
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IVariablesAndConsts.StaticSubroutineVariable(varInSub.datatype, varInSub.name, var2InSub.zeropage, varInSub.position, varInSub),
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IVariablesAndConsts.StaticSubroutineVariable(var2InSub.datatype, var2InSub.name, var2InSub.zeropage, var2InSub.position, var2InSub)
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)
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subroutineConsts = mutableMapOf()
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subroutineMemvars = mutableMapOf()
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@ -4,9 +4,10 @@ import prog8.ast.base.DataType
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import prog8.ast.base.FatalAstException
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import prog8.ast.base.Position
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import prog8.ast.base.VarDeclType
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import prog8.ast.expressions.IdentifierReference
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import prog8.ast.expressions.StringLiteralValue
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import prog8.ast.statements.*
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import prog8.compilerinterface.Encoding
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import prog8.ast.walk.IAstVisitor
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import prog8.compilerinterface.IMemSizer
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import prog8.compilerinterface.IStringEncoding
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import prog8.parser.SourceCode
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@ -74,7 +75,8 @@ class Program(val name: String,
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get() = toplevelModule.loadAddress
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var actualLoadAddress = 0u
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private val internedStringsUnique = mutableMapOf<Pair<String, Encoding>, List<String>>()
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private val internedStringsReferenceCounts = mutableMapOf<VarDecl, Int>()
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fun internString(string: StringLiteralValue): List<String> {
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// Move a string literal into the internal, deduplicated, string pool
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@ -85,10 +87,11 @@ class Program(val name: String,
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throw FatalAstException("cannot intern a string literal that's part of a vardecl")
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}
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fun getScopedName(string: StringLiteralValue): List<String> {
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val internedStringsBlock = modules
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.first { it.name == internedStringsModuleName }.statements
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.first { it is Block && it.name == internedStringsModuleName } as Block
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val internedStringsBlock = modules
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.first { it.name == internedStringsModuleName }.statements
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.first { it is Block && it.name == internedStringsModuleName } as Block
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fun addNewInternedStringvar(string: StringLiteralValue): Pair<List<String>, VarDecl> {
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val varName = "string_${internedStringsBlock.statements.size}"
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val decl = VarDecl(
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VarDeclType.VAR, VarDeclOrigin.STRINGLITERAL, DataType.STR, ZeropageWish.NOT_IN_ZEROPAGE, null, varName, string,
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@ -96,16 +99,58 @@ class Program(val name: String,
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)
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internedStringsBlock.statements.add(decl)
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decl.linkParents(internedStringsBlock)
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return listOf(internedStringsModuleName, decl.name)
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return Pair(listOf(internedStringsModuleName, decl.name), decl)
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}
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val key = Pair(string.value, string.encoding)
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val existing = internedStringsUnique[key]
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if (existing != null)
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return existing
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val scopedName = getScopedName(string)
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internedStringsUnique[key] = scopedName
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return scopedName
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val existingDecl = internedStringsBlock.statements.singleOrNull {
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val declString = (it as VarDecl).value as StringLiteralValue
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declString.encoding == string.encoding && declString.value == string.value
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}
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return if (existingDecl != null) {
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existingDecl as VarDecl
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internedStringsReferenceCounts[existingDecl] = internedStringsReferenceCounts.getValue(existingDecl)+1
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existingDecl.scopedName
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}
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else {
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val (newName, newDecl) = addNewInternedStringvar(string)
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internedStringsReferenceCounts[newDecl] = 1
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newName
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}
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}
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fun removeInternedStringsFromRemovedSubroutine(sub: Subroutine) {
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val s = StringSearch(this)
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sub.accept(s)
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s.removeStrings(modules)
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}
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fun removeInternedStringsFromRemovedBlock(block: Block) {
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val s = StringSearch(this)
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block.accept(s)
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s.removeStrings(modules)
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}
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private class StringSearch(val program: Program): IAstVisitor {
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val removals = mutableListOf<List<String>>()
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override fun visit(identifier: IdentifierReference) {
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if(identifier.wasStringLiteral(program))
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removals.add(identifier.nameInSource)
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}
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fun removeStrings(modules: List<Module>) {
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if(removals.isNotEmpty()) {
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val internedStringsBlock = modules
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.first { it.name == internedStringsModuleName }.statements
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.first { it is Block && it.name == internedStringsModuleName } as Block
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removals.forEach { scopedname ->
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val decl = internedStringsBlock.statements.single { decl -> (decl as VarDecl).scopedName == scopedname } as VarDecl
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val numRefs = program.internedStringsReferenceCounts.getValue(decl) - 1
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program.internedStringsReferenceCounts[decl] = numRefs
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if(numRefs==0)
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internedStringsBlock.statements.remove(decl)
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}
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}
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}
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}
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}
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@ -6,6 +6,7 @@ import prog8.ast.expressions.Expression
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import prog8.ast.statements.Block
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import prog8.ast.statements.Subroutine
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import prog8.ast.statements.VarDecl
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import prog8.ast.statements.ZeropageWish
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/**
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* Experimental attempt for:
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@ -16,8 +17,8 @@ interface IVariablesAndConsts {
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data class ConstantNumberSymbol(val type: DataType, val name: String, val value: Double, val position: Position)
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data class MemoryMappedVariable(val type: DataType, val name: String, val address: UInt, val position: Position)
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// TODO should get rid of origVar altogether in the following two:
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data class StaticBlockVariable(val type: DataType, val name: String, val initialValue: Expression?, val position: Position, val origVar: VarDecl)
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data class StaticSubroutineVariable(val type: DataType, val name: String, val position: Position, val origVar: VarDecl)
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data class StaticBlockVariable(val type: DataType, val name: String, val initialValue: Expression?, val zp: ZeropageWish, val position: Position, val origVar: VarDecl)
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data class StaticSubroutineVariable(val type: DataType, val name: String, val zp: ZeropageWish, val position: Position, val origVar: VarDecl)
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fun dump(memsizer: IMemSizer)
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@ -3,7 +3,8 @@ TODO
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For next release
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^^^^^^^^^^^^^^^^
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...
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- (newvaralloc) UnusedCodeRemover after(decl: VarDecl): fix that vars defined in a library can also safely be removed if unused. Currently this breaks programs such as textelite (due to diskio.save().end_address ?)
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Need help with
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^^^^^^^^^^^^^^
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@ -2,42 +2,43 @@
|
||||
%zeropage basicsafe
|
||||
|
||||
main {
|
||||
ubyte mainglobal1 = 10
|
||||
ubyte mainglobal2 = 20
|
||||
ubyte mainglobal3 = 30
|
||||
ubyte mainglobal4 = 40
|
||||
ubyte @zp mainglobal1=10
|
||||
|
||||
sub start() {
|
||||
ubyte startval1 = 100
|
||||
ubyte startval2 = 110
|
||||
ubyte startval3 = 120
|
||||
ubyte startval4 = 130
|
||||
|
||||
txt.print_ub(mainglobal1)
|
||||
txt.nl()
|
||||
txt.print_ub(startval1)
|
||||
txt.nl()
|
||||
derp()
|
||||
derp()
|
||||
foobar()
|
||||
startval1++
|
||||
mainglobal1++
|
||||
start2()
|
||||
|
||||
sub start2() {
|
||||
uword @shared startval1 = 2002
|
||||
ubyte[2] @shared barr
|
||||
uword[2] @shared warr
|
||||
uword[] @shared warr2 = [1,2]
|
||||
}
|
||||
c64.SETNAM(1, "$")
|
||||
txt.print("1")
|
||||
txt.print("12")
|
||||
txt.print("test.")
|
||||
txt.print("test.")
|
||||
; foobar(2,1,1,1)
|
||||
; foobar2(2,1,1,1)
|
||||
}
|
||||
|
||||
asmsub derp() {
|
||||
sub unusedsubroutine() {
|
||||
c64.SETNAM(1, "$") ; TODO fix don't remove this interned string because referenced in start()
|
||||
txt.print("this string should be removed from the pool")
|
||||
txt.print("this string should be removed from the pool")
|
||||
txt.print("this string should be removed from the pool")
|
||||
}
|
||||
|
||||
sub foobar() {
|
||||
uword @shared startval1 = 2002
|
||||
uword @shared mainglobal1 = 2002
|
||||
txt.print("foobar\n")
|
||||
; asmsub foobar2(ubyte argument @A, uword a2 @R0, uword a3 @R1, uword a4 @R2) -> ubyte @A {
|
||||
; %asm {{
|
||||
; lda #0
|
||||
; rts
|
||||
; }}
|
||||
; }
|
||||
; sub foobar(ubyte argument, uword a2, uword a3, uword a4) -> ubyte {
|
||||
; argument++
|
||||
; return lsb(a2)
|
||||
; }
|
||||
}
|
||||
|
||||
foobar {
|
||||
str name = "don't remove this one"
|
||||
|
||||
sub unusedinfoobar() {
|
||||
name = "should be removed" ; TODO remove from interned strings because subroutine got removed
|
||||
txt.print(name)
|
||||
txt.print("should also be removed2") ; TODO remove from interned strings because subroutine got removed
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user