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fix comparison of memory expressions (this error prevented some optimizations)

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Irmen de Jong 2020-03-26 22:59:42 +01:00
parent 152888ee93
commit ab7d7c2907
1 changed files with 7 additions and 1 deletions
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8
compiler/src/prog8/ast/statements/AstStatements.kt
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@ -432,7 +432,13 @@ data class AssignTarget(val register: Register?,
infix fun isSameAs(value: Expression): Boolean { infix fun isSameAs(value: Expression): Boolean {
return when { return when {
this.memoryAddress!=null -> false this.memoryAddress!=null -> {
// if the target is a memory write, and the value is a memory read, they're the same if the address matches
if(value is DirectMemoryRead)
this.memoryAddress.addressExpression isSameAs value.addressExpression
else
false
}
this.register!=null -> value is RegisterExpr && value.register==register this.register!=null -> value is RegisterExpr && value.register==register
this.identifier!=null -> value is IdentifierReference && value.nameInSource==identifier!!.nameInSource this.identifier!=null -> value is IdentifierReference && value.nameInSource==identifier!!.nameInSource
this.arrayindexed!=null -> value is ArrayIndexedExpression && this.arrayindexed!=null -> value is ArrayIndexedExpression &&