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fix compiler error and codegen fault on signed value bitwise operation

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This commit is contained in:
Irmen de Jong 2023-05-28 12:10:56 +02:00
parent d9e13201dd
commit 0eb2d437e2
5 changed files with 62 additions and 18 deletions
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6
codeOptimizers/src/prog8/optimizer/UnusedCodeRemover.kt
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@ -157,6 +157,12 @@ class UnusedCodeRemover(private val program: Program,
return noModifications
}
override fun after(assignment: Assignment, parent: Node): Iterable<IAstModification> {
if(assignment.target isSameAs assignment.value)
return listOf(IAstModification.Remove(assignment, parent as IStatementContainer))
return noModifications
}
private fun deduplicateAssignments(statements: List<Statement>, scope: IStatementContainer): List<IAstModification> {
// removes 'duplicate' assignments that assign the same target directly after another, unless it is a function call
val linesToRemove = mutableListOf<Assignment>()

11
compiler/src/prog8/compiler/astprocessing/AstChecker.kt
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@ -480,7 +480,9 @@ internal class AstChecker(private val program: Program,
errors.err("target datatype is unknown", assignment.target.position)
// otherwise, another error about missing symbol is already reported.
} else {
errors.err("type of value $valueDt doesn't match target $targetDt", assignment.value.position)
// allow bitwise operations on different types as long as the size is the same
if (!((assignment.value as? BinaryExpression)?.operator in BitwiseOperators && targetDt.isBytes && valueDt.isBytes || targetDt.isWords && valueDt.isWords))
errors.err("type of value $valueDt doesn't match target $targetDt", assignment.value.position)
}
}
}
@ -1607,8 +1609,11 @@ internal class AstChecker(private val program: Program,
else if(sourceDatatype== DataType.FLOAT && targetDatatype in IntegerDatatypes)
errors.err("cannot assign float to ${targetDatatype.name.lowercase()}; possible loss of precision. Suggestion: round the value or revert to integer arithmetic", position)
else {
if(targetDatatype!=DataType.UWORD && sourceDatatype !in PassByReferenceDatatypes)
errors.err("type of value $sourceDatatype doesn't match target $targetDatatype", position)
if(targetDatatype!=DataType.UWORD && sourceDatatype !in PassByReferenceDatatypes) {
// allow bitwise operations on different types as long as the size is the same
if (!((sourceValue as? BinaryExpression)?.operator in BitwiseOperators && targetDatatype.equalsSize(sourceDatatype)))
errors.err("type of value $sourceDatatype doesn't match target $targetDatatype", position)
}
}
return false

5
compiler/src/prog8/compiler/astprocessing/BeforeAsmAstChanger.kt
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@ -93,6 +93,11 @@ internal class BeforeAsmAstChanger(val program: Program,
)
}
} else {
if(binExpr.left isSameAs assignment.target)
return noModifications
val typeCast = binExpr.left as? TypecastExpression
if(typeCast!=null && typeCast.expression isSameAs assignment.target)
return noModifications
val sourceDt = binExpr.left.inferType(program).getOrElse { throw AssemblyError("unknown dt") }
val (_, left) = binExpr.left.typecastTo(assignment.target.inferType(program).getOrElse { throw AssemblyError(
"unknown dt"

26
compiler/src/prog8/compiler/astprocessing/TypecastsAdder.kt
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@ -133,9 +133,16 @@ class TypecastsAdder(val program: Program, val options: CompilationOptions, val
return listOf(IAstModification.ReplaceNode(expr.left, cast, expr))
}
if(leftDt istype DataType.WORD && rightDt.oneOf(DataType.UBYTE, DataType.UWORD)) {
// cast left to unsigned
val cast = TypecastExpression(expr.left, rightDt.getOr(DataType.UNDEFINED), true, expr.left.position)
return listOf(IAstModification.ReplaceNode(expr.left, cast, expr))
// cast left to unsigned word. Cast right to unsigned word if it is ubyte
val mods = mutableListOf<IAstModification>()
val cast = TypecastExpression(expr.left, DataType.UWORD, true, expr.left.position)
mods += IAstModification.ReplaceNode(expr.left, cast, expr)
if(rightDt istype DataType.UBYTE) {
mods += IAstModification.ReplaceNode(expr.right,
TypecastExpression(expr.right, DataType.UWORD, true, expr.right.position),
expr)
}
return mods
}
if(rightDt istype DataType.BYTE && leftDt.oneOf(DataType.UBYTE, DataType.UWORD)) {
// cast right to unsigned
@ -143,9 +150,16 @@ class TypecastsAdder(val program: Program, val options: CompilationOptions, val
return listOf(IAstModification.ReplaceNode(expr.right, cast, expr))
}
if(rightDt istype DataType.WORD && leftDt.oneOf(DataType.UBYTE, DataType.UWORD)) {
// cast right to unsigned
val cast = TypecastExpression(expr.right, leftDt.getOr(DataType.UNDEFINED), true, expr.right.position)
return listOf(IAstModification.ReplaceNode(expr.right, cast, expr))
// cast right to unsigned word. Cast left to unsigned word if it is ubyte
val mods = mutableListOf<IAstModification>()
val cast = TypecastExpression(expr.right, DataType.UWORD, true, expr.right.position)
mods += IAstModification.ReplaceNode(expr.right, cast, expr)
if(leftDt istype DataType.UBYTE) {
mods += IAstModification.ReplaceNode(expr.left,
TypecastExpression(expr.left, DataType.UWORD, true, expr.left.position),
expr)
}
return mods
}
}

32
examples/test.p8
View File

@ -4,18 +4,32 @@
main {
sub start() {
ubyte ub = 123
byte bb = -100
uword uw = 12345
word ww = -12345
uword table = memory("table", 100, 0)
ub |= 63 ; vm/c64 ok (127)
bb |= 63 ; vm/c64 ok (-65)
uw |= 63 ; vm/c64 ok (12351)
ww |= 63 ; vm/c64 ok (-12289)
ubyte pos
for pos in 0 to 7 {
pokew(table + 64 + pos*2, ($000a-pos)*200)
}
txt.print_ub(ub)
txt.spc()
txt.print_b(bb)
txt.spc()
txt.print_uw(uw)
txt.spc()
txt.print_w(ww)
txt.nl()
for pos in 0 to 7 {
txt.print_uw(peekw(table+64+pos*2))
txt.nl()
}
uw |= 16384 ; vm/c64 ok (28735)
ww |= 8192 ; vm/c64 ok (-4097)
txt.print_uw(uw)
txt.spc()
txt.print_w(ww)
txt.nl()
}
}