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improved pointer[0]

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Irmen de Jong
2025-09-24 22:23:26 +02:00
parent 50fecbcebe
commit abeefb5655
5 changed files with 90 additions and 117 deletions
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14
codeOptimizers/src/prog8/optimizer/ExpressionSimplifier.kt
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@@ -492,17 +492,27 @@ class ExpressionSimplifier(private val program: Program, private val errors: IEr
return noModifications
}
override fun after(arrayIndexedExpression: ArrayIndexedExpression, parent: Node): Iterable<IAstModification> {
if(arrayIndexedExpression.indexer.constIndex()==0) {
if(arrayIndexedExpression.plainarrayvar!=null) {
if((arrayIndexedExpression.parent as? BinaryExpression)?.operator !=".") {
val binexprParent = arrayIndexedExpression.parent as? BinaryExpression
if(binexprParent?.operator!=".") {
val dt = arrayIndexedExpression.plainarrayvar!!.inferType(program).getOrUndef()
if(dt.isPointer) {
// pointer[0] --> pointer^^
val deref = PtrDereference(arrayIndexedExpression.plainarrayvar!!.nameInSource, true, arrayIndexedExpression.plainarrayvar!!.position)
return listOf(IAstModification.ReplaceNode(arrayIndexedExpression,deref, parent))
}
} else if(arrayIndexedExpression.pointerderef==null) {
// possibly pointer[0].field --> pointer.field
val target = arrayIndexedExpression.plainarrayvar!!.targetVarDecl()
if(target?.datatype?.isPointer==true) {
val field = (binexprParent.right as? IdentifierReference)?.nameInSource
if(field!=null) {
val deref = PtrDereference(arrayIndexedExpression.plainarrayvar!!.nameInSource + field, false, arrayIndexedExpression.plainarrayvar!!.position)
return listOf(IAstModification.ReplaceNode(arrayIndexedExpression.parent, deref, arrayIndexedExpression.parent.parent))
}
}
}
}
val ptrDeref = arrayIndexedExpression.pointerderef