Apple-2-SW/prog8
1
0
Fork 0
mirror of https://github.com/irmen/prog8.git synced 2024-11-22 15:33:02 +00:00
Code Issues Projects Releases Wiki Activity

fix invalid const optimization with multiplication

Browse Source
This commit is contained in:
Irmen de Jong 2024-01-06 13:59:13 +01:00
parent 8e6b91cb9e
commit 806654fc44
1 changed files with 8 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
codeOptimizers/src/prog8/optimizer/ConstantFoldingOptimizer.kt
View File

@ -233,10 +233,14 @@ class ConstantFoldingOptimizer(private val program: Program, private val errors:
}
else if(leftBinExpr.operator=="*" && rightBinExpr.operator=="*"){
if (c1 != null && c2 != null && c1==c2) {
//(X * C) <plusmin> (Y * C) => (X <plusmin> Y) * C
val xwithy = BinaryExpression(leftBinExpr.left, expr.operator, rightBinExpr.left, expr.position)
val newExpr = BinaryExpression(xwithy, "*", c1, expr.position)
modifications += IAstModification.ReplaceNode(expr, newExpr, parent)
//(X * C) <plusmin> (Y * C) => (X <plusmin> Y) * C (only if types of X and Y are the same!)
val xDt = leftBinExpr.left.inferType(program)
val yDt = rightBinExpr.left.inferType(program)
if(xDt==yDt) {
val xwithy = BinaryExpression(leftBinExpr.left, expr.operator, rightBinExpr.left, expr.position)
val newExpr = BinaryExpression(xwithy, "*", c1, expr.position)
modifications += IAstModification.ReplaceNode(expr, newExpr, parent)
}
}
}
}