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added if expression: ubyte a = if b>0 44 else 55

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it doesn't generate the best code yet, like regular ifs do.
This commit is contained in:
Irmen de Jong
2024-10-19 15:34:04 +02:00
parent d5fc69d3e4
commit 9851d14fb9
13 changed files with 202 additions and 53 deletions
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codeGenIntermediate/src/prog8/codegen/intermediate/ExpressionGen.kt
+31
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@@ -79,6 +79,7 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
is PtPrefix -> translate(expr)
is PtArrayIndexer -> translate(expr)
is PtBinaryExpression -> translate(expr)
is PtIfExpression -> translate(expr)
is PtBuiltinFunctionCall -> codeGen.translateBuiltinFunc(expr)
is PtFunctionCall -> translate(expr)
is PtContainmentCheck -> translate(expr)
@@ -89,6 +90,36 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
}
}
private fun translate(ifExpr: PtIfExpression): ExpressionCodeResult {
// TODO dont store condition as expression result but just use the flags, like a normal PtIfElse translation does
val condTr = translateExpression(ifExpr.condition)
val trueTr = translateExpression(ifExpr.truevalue)
val falseTr = translateExpression(ifExpr.falsevalue)
val irDt = irType(ifExpr.type)
val result = mutableListOf<IRCodeChunkBase>()
val falseLabel = codeGen.createLabelName()
val endLabel = codeGen.createLabelName()
addToResult(result, condTr, condTr.resultReg, -1)
addInstr(result, IRInstruction(Opcode.BSTEQ, labelSymbol = falseLabel), null)
if (irDt != IRDataType.FLOAT) {
addToResult(result, trueTr, trueTr.resultReg, -1)
addInstr(result, IRInstruction(Opcode.JUMP, labelSymbol = endLabel), null)
result += IRCodeChunk(falseLabel, null)
addToResult(result, falseTr, trueTr.resultReg, -1)
result += IRCodeChunk(endLabel, null)
return ExpressionCodeResult(result, irDt, trueTr.resultReg, -1)
} else {
addToResult(result, trueTr, -1, trueTr.resultFpReg)
addInstr(result, IRInstruction(Opcode.JUMP, labelSymbol = endLabel), null)
result += IRCodeChunk(falseLabel, null)
addToResult(result, falseTr, -1, trueTr.resultFpReg)
result += IRCodeChunk(endLabel, null)
return ExpressionCodeResult(result, irDt, -1, trueTr.resultFpReg)
}
}
private fun translate(expr: PtAddressOf): ExpressionCodeResult {
val vmDt = irType(expr.type)
val symbol = expr.identifier.name