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no longer do return value optimization with tempvar, this caused invalid code sometimes.

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This commit is contained in:
Irmen de Jong 2022-12-14 22:33:16 +01:00
parent 8ab47d3321
commit ca7932c4f0
1 changed files with 0 additions and 27 deletions
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27
codeOptimizers/src/prog8/optimizer/StatementOptimizer.kt
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@ -374,31 +374,4 @@ class StatementOptimizer(private val program: Program,
return noModifications return noModifications
} }
override fun after(returnStmt: Return, parent: Node): Iterable<IAstModification> {
if(compTarget.name==VMTarget.NAME)
return noModifications
val returnvalue = returnStmt.value
if (returnvalue!=null) {
val dt = returnvalue.inferType(program).getOr(DataType.UNDEFINED)
if(dt!=DataType.UNDEFINED) {
if (returnvalue is BinaryExpression || (returnvalue is TypecastExpression && !returnvalue.expression.isSimple)) {
// first assign to intermediary variable, then return that
val (returnVarName, _) = program.getTempVar(dt)
val returnValueIntermediary = IdentifierReference(returnVarName, returnStmt.position)
val tgt = AssignTarget(returnValueIntermediary, null, null, returnStmt.position)
val assign = Assignment(tgt, returnvalue, AssignmentOrigin.OPTIMIZER, returnStmt.position)
val returnReplacement = Return(returnValueIntermediary.copy(), returnStmt.position)
return listOf(
IAstModification.InsertBefore(returnStmt, assign, parent as IStatementContainer),
IAstModification.ReplaceNode(returnStmt, returnReplacement, parent)
)
}
}
}
return noModifications
}
} }