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Fix GenC tail rec elimination for unit functions when body is not in Block #1640

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Fix GenC tail rec elimination for unit functions when body is not in Block #1640

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9 changes: 4 additions & 5 deletions core/src/main/scala/stainless/genc/ir/TailRecTransformer.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -111,11 +111,10 @@ final class TailRecTransformer(val ctx: inox.Context) extends Transformer(SIR, T
val labelName = freshId("label")
val bodyWithNewParams = replaceBindings(newParamMap, body)
val bodyWithUnitReturn = bodyWithNewParams match {
case Block(stmts) =>
if fd.returnType.isUnitType then
Block(stmts :+ Return(Lit(UnitLit)))
else
bodyWithNewParams
case Block(stmts) if fd.returnType.isUnitType =>
Block(stmts :+ Return(Lit(UnitLit)))
case _ if fd.returnType.isUnitType =>
Block(Seq(bodyWithNewParams, Return(Lit(UnitLit))))
case _ => bodyWithNewParams
}
val declarations = newParamMap.toList.map { case (old, nw) => Decl(nw, Some(Binding(old))) }
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